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![Zeng Heng](/assets/img/avatar_default.png)
[ Upstream commit3c675ddffb
] Here is a BUG report from syzbot: BUG: KASAN: slab-out-of-bounds in ntfs_list_ea fs/ntfs3/xattr.c:191 [inline] BUG: KASAN: slab-out-of-bounds in ntfs_listxattr+0x401/0x570 fs/ntfs3/xattr.c:710 Read of size 1 at addr ffff888021acaf3d by task syz-executor128/3632 Call Trace: ntfs_list_ea fs/ntfs3/xattr.c:191 [inline] ntfs_listxattr+0x401/0x570 fs/ntfs3/xattr.c:710 vfs_listxattr fs/xattr.c:457 [inline] listxattr+0x293/0x2d0 fs/xattr.c:804 Fix the logic of ea_all iteration. When the ea->name_len is 0, return immediately, or Add2Ptr() would visit invalid memory in the next loop. Fixes:be71b5cba2
("fs/ntfs3: Add attrib operations") Reported-by: syzbot+9fcea5ef6dc4dc72d334@syzkaller.appspotmail.com Signed-off-by: Zeng Heng <zengheng4@huawei.com> [almaz.alexandrovich@paragon-software.com: lines of the patch have changed] Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
1024 lines
21 KiB
C
1024 lines
21 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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*
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* Copyright (C) 2019-2021 Paragon Software GmbH, All rights reserved.
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*
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*/
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#include <linux/fs.h>
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#include <linux/posix_acl.h>
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#include <linux/posix_acl_xattr.h>
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#include <linux/xattr.h>
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#include "debug.h"
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#include "ntfs.h"
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#include "ntfs_fs.h"
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// clang-format off
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#define SYSTEM_DOS_ATTRIB "system.dos_attrib"
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#define SYSTEM_NTFS_ATTRIB "system.ntfs_attrib"
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#define SYSTEM_NTFS_ATTRIB_BE "system.ntfs_attrib_be"
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#define SYSTEM_NTFS_SECURITY "system.ntfs_security"
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// clang-format on
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static inline size_t unpacked_ea_size(const struct EA_FULL *ea)
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{
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return ea->size ? le32_to_cpu(ea->size) :
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ALIGN(struct_size(ea, name,
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1 + ea->name_len +
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le16_to_cpu(ea->elength)),
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4);
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}
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static inline size_t packed_ea_size(const struct EA_FULL *ea)
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{
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return struct_size(ea, name,
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1 + ea->name_len + le16_to_cpu(ea->elength)) -
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offsetof(struct EA_FULL, flags);
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}
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/*
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* find_ea
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*
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* Assume there is at least one xattr in the list.
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*/
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static inline bool find_ea(const struct EA_FULL *ea_all, u32 bytes,
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const char *name, u8 name_len, u32 *off, u32 *ea_sz)
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{
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u32 ea_size;
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*off = 0;
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if (!ea_all)
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return false;
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for (; *off < bytes; *off += ea_size) {
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const struct EA_FULL *ea = Add2Ptr(ea_all, *off);
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ea_size = unpacked_ea_size(ea);
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if (ea->name_len == name_len &&
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!memcmp(ea->name, name, name_len)) {
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if (ea_sz)
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*ea_sz = ea_size;
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return true;
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}
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}
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return false;
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}
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/*
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* ntfs_read_ea - Read all extended attributes.
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* @ea: New allocated memory.
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* @info: Pointer into resident data.
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*/
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static int ntfs_read_ea(struct ntfs_inode *ni, struct EA_FULL **ea,
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size_t add_bytes, const struct EA_INFO **info)
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{
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int err = -EINVAL;
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struct ntfs_sb_info *sbi = ni->mi.sbi;
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struct ATTR_LIST_ENTRY *le = NULL;
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struct ATTRIB *attr_info, *attr_ea;
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void *ea_p;
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u32 size, off, ea_size;
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static_assert(le32_to_cpu(ATTR_EA_INFO) < le32_to_cpu(ATTR_EA));
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*ea = NULL;
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*info = NULL;
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attr_info =
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ni_find_attr(ni, NULL, &le, ATTR_EA_INFO, NULL, 0, NULL, NULL);
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attr_ea =
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ni_find_attr(ni, attr_info, &le, ATTR_EA, NULL, 0, NULL, NULL);
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if (!attr_ea || !attr_info)
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return 0;
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*info = resident_data_ex(attr_info, sizeof(struct EA_INFO));
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if (!*info)
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goto out;
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/* Check Ea limit. */
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size = le32_to_cpu((*info)->size);
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if (size > sbi->ea_max_size) {
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err = -EFBIG;
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goto out;
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}
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if (attr_size(attr_ea) > sbi->ea_max_size) {
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err = -EFBIG;
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goto out;
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}
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if (!size) {
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/* EA info persists, but xattr is empty. Looks like EA problem. */
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goto out;
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}
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/* Allocate memory for packed Ea. */
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ea_p = kmalloc(size_add(size, add_bytes), GFP_NOFS);
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if (!ea_p)
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return -ENOMEM;
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if (attr_ea->non_res) {
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struct runs_tree run;
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run_init(&run);
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err = attr_load_runs_range(ni, ATTR_EA, NULL, 0, &run, 0, size);
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if (!err)
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err = ntfs_read_run_nb(sbi, &run, 0, ea_p, size, NULL);
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run_close(&run);
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if (err)
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goto out1;
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} else {
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void *p = resident_data_ex(attr_ea, size);
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if (!p)
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goto out1;
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memcpy(ea_p, p, size);
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}
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memset(Add2Ptr(ea_p, size), 0, add_bytes);
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/* Check all attributes for consistency. */
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for (off = 0; off < size; off += ea_size) {
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const struct EA_FULL *ef = Add2Ptr(ea_p, off);
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u32 bytes = size - off;
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/* Check if we can use field ea->size. */
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if (bytes < sizeof(ef->size))
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goto out1;
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if (ef->size) {
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ea_size = le32_to_cpu(ef->size);
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if (ea_size > bytes)
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goto out1;
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continue;
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}
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/* Check if we can use fields ef->name_len and ef->elength. */
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if (bytes < offsetof(struct EA_FULL, name))
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goto out1;
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ea_size = ALIGN(struct_size(ef, name,
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1 + ef->name_len +
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le16_to_cpu(ef->elength)),
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4);
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if (ea_size > bytes)
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goto out1;
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}
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*ea = ea_p;
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return 0;
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out1:
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kfree(ea_p);
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out:
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ntfs_set_state(sbi, NTFS_DIRTY_DIRTY);
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return err;
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}
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/*
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* ntfs_list_ea
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*
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* Copy a list of xattrs names into the buffer
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* provided, or compute the buffer size required.
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*
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* Return:
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* * Number of bytes used / required on
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* * -ERRNO - on failure
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*/
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static ssize_t ntfs_list_ea(struct ntfs_inode *ni, char *buffer,
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size_t bytes_per_buffer)
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{
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const struct EA_INFO *info;
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struct EA_FULL *ea_all = NULL;
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const struct EA_FULL *ea;
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u32 off, size;
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int err;
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int ea_size;
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size_t ret;
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err = ntfs_read_ea(ni, &ea_all, 0, &info);
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if (err)
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return err;
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if (!info || !ea_all)
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return 0;
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size = le32_to_cpu(info->size);
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/* Enumerate all xattrs. */
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for (ret = 0, off = 0; off < size; off += ea_size) {
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ea = Add2Ptr(ea_all, off);
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ea_size = unpacked_ea_size(ea);
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if (!ea->name_len)
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break;
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if (buffer) {
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if (ret + ea->name_len + 1 > bytes_per_buffer) {
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err = -ERANGE;
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goto out;
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}
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memcpy(buffer + ret, ea->name, ea->name_len);
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buffer[ret + ea->name_len] = 0;
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}
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ret += ea->name_len + 1;
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}
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out:
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kfree(ea_all);
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return err ? err : ret;
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}
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static int ntfs_get_ea(struct inode *inode, const char *name, size_t name_len,
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void *buffer, size_t size, size_t *required)
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{
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struct ntfs_inode *ni = ntfs_i(inode);
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const struct EA_INFO *info;
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struct EA_FULL *ea_all = NULL;
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const struct EA_FULL *ea;
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u32 off, len;
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int err;
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if (!(ni->ni_flags & NI_FLAG_EA))
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return -ENODATA;
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if (!required)
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ni_lock(ni);
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len = 0;
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if (name_len > 255) {
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err = -ENAMETOOLONG;
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goto out;
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}
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err = ntfs_read_ea(ni, &ea_all, 0, &info);
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if (err)
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goto out;
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if (!info)
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goto out;
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/* Enumerate all xattrs. */
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if (!find_ea(ea_all, le32_to_cpu(info->size), name, name_len, &off,
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NULL)) {
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err = -ENODATA;
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goto out;
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}
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ea = Add2Ptr(ea_all, off);
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len = le16_to_cpu(ea->elength);
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if (!buffer) {
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err = 0;
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goto out;
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}
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if (len > size) {
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err = -ERANGE;
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if (required)
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*required = len;
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goto out;
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}
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memcpy(buffer, ea->name + ea->name_len + 1, len);
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err = 0;
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out:
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kfree(ea_all);
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if (!required)
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ni_unlock(ni);
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return err ? err : len;
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}
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static noinline int ntfs_set_ea(struct inode *inode, const char *name,
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size_t name_len, const void *value,
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size_t val_size, int flags, bool locked,
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__le16 *ea_size)
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{
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struct ntfs_inode *ni = ntfs_i(inode);
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struct ntfs_sb_info *sbi = ni->mi.sbi;
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int err;
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struct EA_INFO ea_info;
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const struct EA_INFO *info;
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struct EA_FULL *new_ea;
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struct EA_FULL *ea_all = NULL;
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size_t add, new_pack;
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u32 off, size, ea_sz;
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__le16 size_pack;
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struct ATTRIB *attr;
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struct ATTR_LIST_ENTRY *le;
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struct mft_inode *mi;
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struct runs_tree ea_run;
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u64 new_sz;
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void *p;
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if (!locked)
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ni_lock(ni);
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run_init(&ea_run);
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if (name_len > 255) {
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err = -ENAMETOOLONG;
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goto out;
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}
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add = ALIGN(struct_size(ea_all, name, 1 + name_len + val_size), 4);
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err = ntfs_read_ea(ni, &ea_all, add, &info);
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if (err)
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goto out;
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if (!info) {
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memset(&ea_info, 0, sizeof(ea_info));
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size = 0;
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size_pack = 0;
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} else {
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memcpy(&ea_info, info, sizeof(ea_info));
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size = le32_to_cpu(ea_info.size);
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size_pack = ea_info.size_pack;
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}
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if (info && find_ea(ea_all, size, name, name_len, &off, &ea_sz)) {
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struct EA_FULL *ea;
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if (flags & XATTR_CREATE) {
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err = -EEXIST;
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goto out;
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}
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ea = Add2Ptr(ea_all, off);
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/*
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* Check simple case when we try to insert xattr with the same value
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* e.g. ntfs_save_wsl_perm
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*/
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if (val_size && le16_to_cpu(ea->elength) == val_size &&
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!memcmp(ea->name + ea->name_len + 1, value, val_size)) {
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/* xattr already contains the required value. */
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goto out;
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}
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/* Remove current xattr. */
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if (ea->flags & FILE_NEED_EA)
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le16_add_cpu(&ea_info.count, -1);
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le16_add_cpu(&ea_info.size_pack, 0 - packed_ea_size(ea));
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memmove(ea, Add2Ptr(ea, ea_sz), size - off - ea_sz);
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size -= ea_sz;
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memset(Add2Ptr(ea_all, size), 0, ea_sz);
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ea_info.size = cpu_to_le32(size);
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if ((flags & XATTR_REPLACE) && !val_size) {
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/* Remove xattr. */
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goto update_ea;
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}
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} else {
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if (flags & XATTR_REPLACE) {
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err = -ENODATA;
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goto out;
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}
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if (!ea_all) {
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ea_all = kzalloc(add, GFP_NOFS);
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if (!ea_all) {
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err = -ENOMEM;
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goto out;
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}
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}
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}
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/* Append new xattr. */
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new_ea = Add2Ptr(ea_all, size);
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new_ea->size = cpu_to_le32(add);
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new_ea->flags = 0;
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new_ea->name_len = name_len;
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new_ea->elength = cpu_to_le16(val_size);
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memcpy(new_ea->name, name, name_len);
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new_ea->name[name_len] = 0;
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memcpy(new_ea->name + name_len + 1, value, val_size);
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new_pack = le16_to_cpu(ea_info.size_pack) + packed_ea_size(new_ea);
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ea_info.size_pack = cpu_to_le16(new_pack);
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/* New size of ATTR_EA. */
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size += add;
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ea_info.size = cpu_to_le32(size);
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/*
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* 1. Check ea_info.size_pack for overflow.
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* 2. New attribute size must fit value from $AttrDef
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*/
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if (new_pack > 0xffff || size > sbi->ea_max_size) {
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ntfs_inode_warn(
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inode,
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"The size of extended attributes must not exceed 64KiB");
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err = -EFBIG; // -EINVAL?
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goto out;
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}
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update_ea:
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if (!info) {
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/* Create xattr. */
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if (!size) {
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err = 0;
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goto out;
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}
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err = ni_insert_resident(ni, sizeof(struct EA_INFO),
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ATTR_EA_INFO, NULL, 0, NULL, NULL,
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NULL);
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if (err)
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goto out;
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err = ni_insert_resident(ni, 0, ATTR_EA, NULL, 0, NULL, NULL,
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NULL);
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if (err)
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goto out;
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}
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new_sz = size;
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err = attr_set_size(ni, ATTR_EA, NULL, 0, &ea_run, new_sz, &new_sz,
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false, NULL);
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if (err)
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goto out;
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le = NULL;
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attr = ni_find_attr(ni, NULL, &le, ATTR_EA_INFO, NULL, 0, NULL, &mi);
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if (!attr) {
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err = -EINVAL;
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goto out;
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}
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if (!size) {
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/* Delete xattr, ATTR_EA_INFO */
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ni_remove_attr_le(ni, attr, mi, le);
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} else {
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p = resident_data_ex(attr, sizeof(struct EA_INFO));
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if (!p) {
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err = -EINVAL;
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goto out;
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}
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memcpy(p, &ea_info, sizeof(struct EA_INFO));
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mi->dirty = true;
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}
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le = NULL;
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attr = ni_find_attr(ni, NULL, &le, ATTR_EA, NULL, 0, NULL, &mi);
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if (!attr) {
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err = -EINVAL;
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goto out;
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}
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if (!size) {
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/* Delete xattr, ATTR_EA */
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ni_remove_attr_le(ni, attr, mi, le);
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} else if (attr->non_res) {
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err = attr_load_runs_range(ni, ATTR_EA, NULL, 0, &ea_run, 0,
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size);
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if (err)
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goto out;
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err = ntfs_sb_write_run(sbi, &ea_run, 0, ea_all, size, 0);
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if (err)
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goto out;
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} else {
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p = resident_data_ex(attr, size);
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if (!p) {
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err = -EINVAL;
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goto out;
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}
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memcpy(p, ea_all, size);
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mi->dirty = true;
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}
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/* Check if we delete the last xattr. */
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if (size)
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ni->ni_flags |= NI_FLAG_EA;
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else
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ni->ni_flags &= ~NI_FLAG_EA;
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if (ea_info.size_pack != size_pack)
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ni->ni_flags |= NI_FLAG_UPDATE_PARENT;
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if (ea_size)
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*ea_size = ea_info.size_pack;
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mark_inode_dirty(&ni->vfs_inode);
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out:
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if (!locked)
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ni_unlock(ni);
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|
run_close(&ea_run);
|
|
kfree(ea_all);
|
|
|
|
return err;
|
|
}
|
|
|
|
#ifdef CONFIG_NTFS3_FS_POSIX_ACL
|
|
|
|
/*
|
|
* ntfs_get_acl - inode_operations::get_acl
|
|
*/
|
|
struct posix_acl *ntfs_get_acl(struct mnt_idmap *idmap,
|
|
struct dentry *dentry, int type)
|
|
{
|
|
struct inode *inode = d_inode(dentry);
|
|
struct ntfs_inode *ni = ntfs_i(inode);
|
|
const char *name;
|
|
size_t name_len;
|
|
struct posix_acl *acl;
|
|
size_t req;
|
|
int err;
|
|
void *buf;
|
|
|
|
/* Allocate PATH_MAX bytes. */
|
|
buf = __getname();
|
|
if (!buf)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
/* Possible values of 'type' was already checked above. */
|
|
if (type == ACL_TYPE_ACCESS) {
|
|
name = XATTR_NAME_POSIX_ACL_ACCESS;
|
|
name_len = sizeof(XATTR_NAME_POSIX_ACL_ACCESS) - 1;
|
|
} else {
|
|
name = XATTR_NAME_POSIX_ACL_DEFAULT;
|
|
name_len = sizeof(XATTR_NAME_POSIX_ACL_DEFAULT) - 1;
|
|
}
|
|
|
|
ni_lock(ni);
|
|
|
|
err = ntfs_get_ea(inode, name, name_len, buf, PATH_MAX, &req);
|
|
|
|
ni_unlock(ni);
|
|
|
|
/* Translate extended attribute to acl. */
|
|
if (err >= 0) {
|
|
acl = posix_acl_from_xattr(&init_user_ns, buf, err);
|
|
} else if (err == -ENODATA) {
|
|
acl = NULL;
|
|
} else {
|
|
acl = ERR_PTR(err);
|
|
}
|
|
|
|
if (!IS_ERR(acl))
|
|
set_cached_acl(inode, type, acl);
|
|
|
|
__putname(buf);
|
|
|
|
return acl;
|
|
}
|
|
|
|
static noinline int ntfs_set_acl_ex(struct mnt_idmap *idmap,
|
|
struct inode *inode, struct posix_acl *acl,
|
|
int type, bool init_acl)
|
|
{
|
|
const char *name;
|
|
size_t size, name_len;
|
|
void *value;
|
|
int err;
|
|
int flags;
|
|
umode_t mode;
|
|
|
|
if (S_ISLNK(inode->i_mode))
|
|
return -EOPNOTSUPP;
|
|
|
|
mode = inode->i_mode;
|
|
switch (type) {
|
|
case ACL_TYPE_ACCESS:
|
|
/* Do not change i_mode if we are in init_acl */
|
|
if (acl && !init_acl) {
|
|
err = posix_acl_update_mode(idmap, inode, &mode,
|
|
&acl);
|
|
if (err)
|
|
return err;
|
|
}
|
|
name = XATTR_NAME_POSIX_ACL_ACCESS;
|
|
name_len = sizeof(XATTR_NAME_POSIX_ACL_ACCESS) - 1;
|
|
break;
|
|
|
|
case ACL_TYPE_DEFAULT:
|
|
if (!S_ISDIR(inode->i_mode))
|
|
return acl ? -EACCES : 0;
|
|
name = XATTR_NAME_POSIX_ACL_DEFAULT;
|
|
name_len = sizeof(XATTR_NAME_POSIX_ACL_DEFAULT) - 1;
|
|
break;
|
|
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (!acl) {
|
|
/* Remove xattr if it can be presented via mode. */
|
|
size = 0;
|
|
value = NULL;
|
|
flags = XATTR_REPLACE;
|
|
} else {
|
|
size = posix_acl_xattr_size(acl->a_count);
|
|
value = kmalloc(size, GFP_NOFS);
|
|
if (!value)
|
|
return -ENOMEM;
|
|
err = posix_acl_to_xattr(&init_user_ns, acl, value, size);
|
|
if (err < 0)
|
|
goto out;
|
|
flags = 0;
|
|
}
|
|
|
|
err = ntfs_set_ea(inode, name, name_len, value, size, flags, 0, NULL);
|
|
if (err == -ENODATA && !size)
|
|
err = 0; /* Removing non existed xattr. */
|
|
if (!err) {
|
|
set_cached_acl(inode, type, acl);
|
|
inode->i_mode = mode;
|
|
inode->i_ctime = current_time(inode);
|
|
mark_inode_dirty(inode);
|
|
}
|
|
|
|
out:
|
|
kfree(value);
|
|
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* ntfs_set_acl - inode_operations::set_acl
|
|
*/
|
|
int ntfs_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
|
|
struct posix_acl *acl, int type)
|
|
{
|
|
return ntfs_set_acl_ex(idmap, d_inode(dentry), acl, type, false);
|
|
}
|
|
|
|
/*
|
|
* ntfs_init_acl - Initialize the ACLs of a new inode.
|
|
*
|
|
* Called from ntfs_create_inode().
|
|
*/
|
|
int ntfs_init_acl(struct mnt_idmap *idmap, struct inode *inode,
|
|
struct inode *dir)
|
|
{
|
|
struct posix_acl *default_acl, *acl;
|
|
int err;
|
|
|
|
err = posix_acl_create(dir, &inode->i_mode, &default_acl, &acl);
|
|
if (err)
|
|
return err;
|
|
|
|
if (default_acl) {
|
|
err = ntfs_set_acl_ex(idmap, inode, default_acl,
|
|
ACL_TYPE_DEFAULT, true);
|
|
posix_acl_release(default_acl);
|
|
} else {
|
|
inode->i_default_acl = NULL;
|
|
}
|
|
|
|
if (acl) {
|
|
if (!err)
|
|
err = ntfs_set_acl_ex(idmap, inode, acl,
|
|
ACL_TYPE_ACCESS, true);
|
|
posix_acl_release(acl);
|
|
} else {
|
|
inode->i_acl = NULL;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* ntfs_acl_chmod - Helper for ntfs3_setattr().
|
|
*/
|
|
int ntfs_acl_chmod(struct mnt_idmap *idmap, struct dentry *dentry)
|
|
{
|
|
struct inode *inode = d_inode(dentry);
|
|
struct super_block *sb = inode->i_sb;
|
|
|
|
if (!(sb->s_flags & SB_POSIXACL))
|
|
return 0;
|
|
|
|
if (S_ISLNK(inode->i_mode))
|
|
return -EOPNOTSUPP;
|
|
|
|
return posix_acl_chmod(idmap, dentry, inode->i_mode);
|
|
}
|
|
|
|
/*
|
|
* ntfs_listxattr - inode_operations::listxattr
|
|
*/
|
|
ssize_t ntfs_listxattr(struct dentry *dentry, char *buffer, size_t size)
|
|
{
|
|
struct inode *inode = d_inode(dentry);
|
|
struct ntfs_inode *ni = ntfs_i(inode);
|
|
ssize_t ret;
|
|
|
|
if (!(ni->ni_flags & NI_FLAG_EA)) {
|
|
/* no xattr in file */
|
|
return 0;
|
|
}
|
|
|
|
ni_lock(ni);
|
|
|
|
ret = ntfs_list_ea(ni, buffer, size);
|
|
|
|
ni_unlock(ni);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int ntfs_getxattr(const struct xattr_handler *handler, struct dentry *de,
|
|
struct inode *inode, const char *name, void *buffer,
|
|
size_t size)
|
|
{
|
|
int err;
|
|
struct ntfs_inode *ni = ntfs_i(inode);
|
|
|
|
/* Dispatch request. */
|
|
if (!strcmp(name, SYSTEM_DOS_ATTRIB)) {
|
|
/* system.dos_attrib */
|
|
if (!buffer) {
|
|
err = sizeof(u8);
|
|
} else if (size < sizeof(u8)) {
|
|
err = -ENODATA;
|
|
} else {
|
|
err = sizeof(u8);
|
|
*(u8 *)buffer = le32_to_cpu(ni->std_fa);
|
|
}
|
|
goto out;
|
|
}
|
|
|
|
if (!strcmp(name, SYSTEM_NTFS_ATTRIB) ||
|
|
!strcmp(name, SYSTEM_NTFS_ATTRIB_BE)) {
|
|
/* system.ntfs_attrib */
|
|
if (!buffer) {
|
|
err = sizeof(u32);
|
|
} else if (size < sizeof(u32)) {
|
|
err = -ENODATA;
|
|
} else {
|
|
err = sizeof(u32);
|
|
*(u32 *)buffer = le32_to_cpu(ni->std_fa);
|
|
if (!strcmp(name, SYSTEM_NTFS_ATTRIB_BE))
|
|
*(__be32 *)buffer = cpu_to_be32(*(u32 *)buffer);
|
|
}
|
|
goto out;
|
|
}
|
|
|
|
if (!strcmp(name, SYSTEM_NTFS_SECURITY)) {
|
|
/* system.ntfs_security*/
|
|
struct SECURITY_DESCRIPTOR_RELATIVE *sd = NULL;
|
|
size_t sd_size = 0;
|
|
|
|
if (!is_ntfs3(ni->mi.sbi)) {
|
|
/* We should get nt4 security. */
|
|
err = -EINVAL;
|
|
goto out;
|
|
} else if (le32_to_cpu(ni->std_security_id) <
|
|
SECURITY_ID_FIRST) {
|
|
err = -ENOENT;
|
|
goto out;
|
|
}
|
|
|
|
err = ntfs_get_security_by_id(ni->mi.sbi, ni->std_security_id,
|
|
&sd, &sd_size);
|
|
if (err)
|
|
goto out;
|
|
|
|
if (!is_sd_valid(sd, sd_size)) {
|
|
ntfs_inode_warn(
|
|
inode,
|
|
"looks like you get incorrect security descriptor id=%u",
|
|
ni->std_security_id);
|
|
}
|
|
|
|
if (!buffer) {
|
|
err = sd_size;
|
|
} else if (size < sd_size) {
|
|
err = -ENODATA;
|
|
} else {
|
|
err = sd_size;
|
|
memcpy(buffer, sd, sd_size);
|
|
}
|
|
kfree(sd);
|
|
goto out;
|
|
}
|
|
|
|
/* Deal with NTFS extended attribute. */
|
|
err = ntfs_get_ea(inode, name, strlen(name), buffer, size, NULL);
|
|
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* ntfs_setxattr - inode_operations::setxattr
|
|
*/
|
|
static noinline int ntfs_setxattr(const struct xattr_handler *handler,
|
|
struct mnt_idmap *idmap,
|
|
struct dentry *de, struct inode *inode,
|
|
const char *name, const void *value,
|
|
size_t size, int flags)
|
|
{
|
|
int err = -EINVAL;
|
|
struct ntfs_inode *ni = ntfs_i(inode);
|
|
enum FILE_ATTRIBUTE new_fa;
|
|
|
|
/* Dispatch request. */
|
|
if (!strcmp(name, SYSTEM_DOS_ATTRIB)) {
|
|
if (sizeof(u8) != size)
|
|
goto out;
|
|
new_fa = cpu_to_le32(*(u8 *)value);
|
|
goto set_new_fa;
|
|
}
|
|
|
|
if (!strcmp(name, SYSTEM_NTFS_ATTRIB) ||
|
|
!strcmp(name, SYSTEM_NTFS_ATTRIB_BE)) {
|
|
if (size != sizeof(u32))
|
|
goto out;
|
|
if (!strcmp(name, SYSTEM_NTFS_ATTRIB_BE))
|
|
new_fa = cpu_to_le32(be32_to_cpu(*(__be32 *)value));
|
|
else
|
|
new_fa = cpu_to_le32(*(u32 *)value);
|
|
|
|
if (S_ISREG(inode->i_mode)) {
|
|
/* Process compressed/sparsed in special way. */
|
|
ni_lock(ni);
|
|
err = ni_new_attr_flags(ni, new_fa);
|
|
ni_unlock(ni);
|
|
if (err)
|
|
goto out;
|
|
}
|
|
set_new_fa:
|
|
/*
|
|
* Thanks Mark Harmstone:
|
|
* Keep directory bit consistency.
|
|
*/
|
|
if (S_ISDIR(inode->i_mode))
|
|
new_fa |= FILE_ATTRIBUTE_DIRECTORY;
|
|
else
|
|
new_fa &= ~FILE_ATTRIBUTE_DIRECTORY;
|
|
|
|
if (ni->std_fa != new_fa) {
|
|
ni->std_fa = new_fa;
|
|
if (new_fa & FILE_ATTRIBUTE_READONLY)
|
|
inode->i_mode &= ~0222;
|
|
else
|
|
inode->i_mode |= 0222;
|
|
/* Std attribute always in primary record. */
|
|
ni->mi.dirty = true;
|
|
mark_inode_dirty(inode);
|
|
}
|
|
err = 0;
|
|
|
|
goto out;
|
|
}
|
|
|
|
if (!strcmp(name, SYSTEM_NTFS_SECURITY)) {
|
|
/* system.ntfs_security*/
|
|
__le32 security_id;
|
|
bool inserted;
|
|
struct ATTR_STD_INFO5 *std;
|
|
|
|
if (!is_ntfs3(ni->mi.sbi)) {
|
|
/*
|
|
* We should replace ATTR_SECURE.
|
|
* Skip this way cause it is nt4 feature.
|
|
*/
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
if (!is_sd_valid(value, size)) {
|
|
err = -EINVAL;
|
|
ntfs_inode_warn(
|
|
inode,
|
|
"you try to set invalid security descriptor");
|
|
goto out;
|
|
}
|
|
|
|
err = ntfs_insert_security(ni->mi.sbi, value, size,
|
|
&security_id, &inserted);
|
|
if (err)
|
|
goto out;
|
|
|
|
ni_lock(ni);
|
|
std = ni_std5(ni);
|
|
if (!std) {
|
|
err = -EINVAL;
|
|
} else if (std->security_id != security_id) {
|
|
std->security_id = ni->std_security_id = security_id;
|
|
/* Std attribute always in primary record. */
|
|
ni->mi.dirty = true;
|
|
mark_inode_dirty(&ni->vfs_inode);
|
|
}
|
|
ni_unlock(ni);
|
|
goto out;
|
|
}
|
|
|
|
/* Deal with NTFS extended attribute. */
|
|
err = ntfs_set_ea(inode, name, strlen(name), value, size, flags, 0,
|
|
NULL);
|
|
|
|
out:
|
|
inode->i_ctime = current_time(inode);
|
|
mark_inode_dirty(inode);
|
|
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* ntfs_save_wsl_perm
|
|
*
|
|
* save uid/gid/mode in xattr
|
|
*/
|
|
int ntfs_save_wsl_perm(struct inode *inode, __le16 *ea_size)
|
|
{
|
|
int err;
|
|
__le32 value;
|
|
struct ntfs_inode *ni = ntfs_i(inode);
|
|
|
|
ni_lock(ni);
|
|
value = cpu_to_le32(i_uid_read(inode));
|
|
err = ntfs_set_ea(inode, "$LXUID", sizeof("$LXUID") - 1, &value,
|
|
sizeof(value), 0, true, ea_size);
|
|
if (err)
|
|
goto out;
|
|
|
|
value = cpu_to_le32(i_gid_read(inode));
|
|
err = ntfs_set_ea(inode, "$LXGID", sizeof("$LXGID") - 1, &value,
|
|
sizeof(value), 0, true, ea_size);
|
|
if (err)
|
|
goto out;
|
|
|
|
value = cpu_to_le32(inode->i_mode);
|
|
err = ntfs_set_ea(inode, "$LXMOD", sizeof("$LXMOD") - 1, &value,
|
|
sizeof(value), 0, true, ea_size);
|
|
if (err)
|
|
goto out;
|
|
|
|
if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
|
|
value = cpu_to_le32(inode->i_rdev);
|
|
err = ntfs_set_ea(inode, "$LXDEV", sizeof("$LXDEV") - 1, &value,
|
|
sizeof(value), 0, true, ea_size);
|
|
if (err)
|
|
goto out;
|
|
}
|
|
|
|
out:
|
|
ni_unlock(ni);
|
|
/* In case of error should we delete all WSL xattr? */
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* ntfs_get_wsl_perm
|
|
*
|
|
* get uid/gid/mode from xattr
|
|
* it is called from ntfs_iget5->ntfs_read_mft
|
|
*/
|
|
void ntfs_get_wsl_perm(struct inode *inode)
|
|
{
|
|
size_t sz;
|
|
__le32 value[3];
|
|
|
|
if (ntfs_get_ea(inode, "$LXUID", sizeof("$LXUID") - 1, &value[0],
|
|
sizeof(value[0]), &sz) == sizeof(value[0]) &&
|
|
ntfs_get_ea(inode, "$LXGID", sizeof("$LXGID") - 1, &value[1],
|
|
sizeof(value[1]), &sz) == sizeof(value[1]) &&
|
|
ntfs_get_ea(inode, "$LXMOD", sizeof("$LXMOD") - 1, &value[2],
|
|
sizeof(value[2]), &sz) == sizeof(value[2])) {
|
|
i_uid_write(inode, (uid_t)le32_to_cpu(value[0]));
|
|
i_gid_write(inode, (gid_t)le32_to_cpu(value[1]));
|
|
inode->i_mode = le32_to_cpu(value[2]);
|
|
|
|
if (ntfs_get_ea(inode, "$LXDEV", sizeof("$$LXDEV") - 1,
|
|
&value[0], sizeof(value),
|
|
&sz) == sizeof(value[0])) {
|
|
inode->i_rdev = le32_to_cpu(value[0]);
|
|
}
|
|
}
|
|
}
|
|
|
|
static bool ntfs_xattr_user_list(struct dentry *dentry)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
// clang-format off
|
|
static const struct xattr_handler ntfs_other_xattr_handler = {
|
|
.prefix = "",
|
|
.get = ntfs_getxattr,
|
|
.set = ntfs_setxattr,
|
|
.list = ntfs_xattr_user_list,
|
|
};
|
|
|
|
const struct xattr_handler *ntfs_xattr_handlers[] = {
|
|
&ntfs_other_xattr_handler,
|
|
NULL,
|
|
};
|
|
// clang-format on
|