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Code Issues Releases Wiki Activity

ksmbd: fix oops from fuse driver 

Marios reported kernel oops from fuse driver when ksmbd call
mark_inode_dirty(). This patch directly update ->i_ctime after removing
mark_inode_ditry() and notify_change will put inode to dirty list.

Cc: Tom Talpey <tom@talpey.com>
Cc: Ronnie Sahlberg <ronniesahlberg@gmail.com>
Cc: Ralph Böhme <slow@samba.org>
Cc: Hyunchul Lee <hyc.lee@gmail.com>
Reported-by: Marios Makassikis <mmakassikis@freebox.fr>
Tested-by: Marios Makassikis <mmakassikis@freebox.fr>
Acked-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Namjae Jeon 2021-10-03 13:19:00 +09:00 committed by Steve French
parent 2db72604f3
commit 64e7875560
1 changed files with 6 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
fs/ksmbd/smb2pdu.c
View File

@ -5483,7 +5483,6 @@ static int set_file_basic_info(struct ksmbd_file *fp,
struct ksmbd_share_config *share)
{
struct iattr attrs;
struct timespec64 ctime;
struct file *filp;
struct inode *inode;
struct user_namespace *user_ns;
@ -5505,13 +5504,11 @@ static int set_file_basic_info(struct ksmbd_file *fp,
attrs.ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
}
if (file_info->ChangeTime) {
attrs.ia_valid |= ATTR_CTIME;
if (file_info->ChangeTime)
attrs.ia_ctime = ksmbd_NTtimeToUnix(file_info->ChangeTime);
ctime = attrs.ia_ctime;
attrs.ia_valid |= ATTR_CTIME;
} else {
ctime = inode->i_ctime;
}
else
attrs.ia_ctime = inode->i_ctime;
if (file_info->LastWriteTime) {
attrs.ia_mtime = ksmbd_NTtimeToUnix(file_info->LastWriteTime);
@ -5557,11 +5554,9 @@ static int set_file_basic_info(struct ksmbd_file *fp,
return -EACCES;
inode_lock(inode);
inode->i_ctime = attrs.ia_ctime;
attrs.ia_valid &= ~ATTR_CTIME;
rc = notify_change(user_ns, dentry, &attrs, NULL);
if (!rc) {
inode->i_ctime = ctime;
mark_inode_dirty(inode);
}
inode_unlock(inode);
}
return rc;