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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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cae9910e73
This adds the ability for Netlink to report a socket's UID along with the
other UNIX diagnostic information that is already available. This will
allow diagnostic tools greater insight into which users control which
socket.
To test this, do the following as a non-root user:
unshare -U -r bash
nc -l -U user.socket.$$ &
.. and verify from within that same session that Netlink UNIX socket
diagnostics report the socket's UID as 0. Also verify that Netlink UNIX
socket diagnostics report the socket's UID as the user's UID from an
unprivileged process in a different session. Verify the same from
a root process.
Signed-off-by: Felipe Gasper <felipe@felipegasper.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
61 lines
1.3 KiB
C
61 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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#ifndef __UNIX_DIAG_H__
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#define __UNIX_DIAG_H__
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#include <linux/types.h>
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struct unix_diag_req {
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__u8 sdiag_family;
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__u8 sdiag_protocol;
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__u16 pad;
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__u32 udiag_states;
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__u32 udiag_ino;
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__u32 udiag_show;
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__u32 udiag_cookie[2];
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};
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#define UDIAG_SHOW_NAME 0x00000001 /* show name (not path) */
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#define UDIAG_SHOW_VFS 0x00000002 /* show VFS inode info */
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#define UDIAG_SHOW_PEER 0x00000004 /* show peer socket info */
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#define UDIAG_SHOW_ICONS 0x00000008 /* show pending connections */
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#define UDIAG_SHOW_RQLEN 0x00000010 /* show skb receive queue len */
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#define UDIAG_SHOW_MEMINFO 0x00000020 /* show memory info of a socket */
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#define UDIAG_SHOW_UID 0x00000040 /* show socket's UID */
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struct unix_diag_msg {
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__u8 udiag_family;
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__u8 udiag_type;
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__u8 udiag_state;
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__u8 pad;
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__u32 udiag_ino;
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__u32 udiag_cookie[2];
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};
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enum {
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/* UNIX_DIAG_NONE, standard nl API requires this attribute! */
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UNIX_DIAG_NAME,
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UNIX_DIAG_VFS,
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UNIX_DIAG_PEER,
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UNIX_DIAG_ICONS,
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UNIX_DIAG_RQLEN,
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UNIX_DIAG_MEMINFO,
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UNIX_DIAG_SHUTDOWN,
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UNIX_DIAG_UID,
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__UNIX_DIAG_MAX,
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};
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#define UNIX_DIAG_MAX (__UNIX_DIAG_MAX - 1)
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struct unix_diag_vfs {
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__u32 udiag_vfs_ino;
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__u32 udiag_vfs_dev;
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};
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struct unix_diag_rqlen {
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__u32 udiag_rqueue;
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__u32 udiag_wqueue;
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};
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#endif
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