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linux-stable/security
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Mickaël Salaün b6e5e69643 landlock: Fix d_parent walk 
commit 88da52ccd6 upstream.

The WARN_ON_ONCE() in collect_domain_accesses() can be triggered when
trying to link a root mount point.  This cannot work in practice because
this directory is mounted, but the VFS check is done after the call to
security_path_link().

Do not use source directory's d_parent when the source directory is the
mount point.

Cc: Günther Noack <gnoack@google.com>
Cc: Paul Moore <paul@paul-moore.com>
Cc: stable@vger.kernel.org
Reported-by: syzbot+bf4903dc7e12b18ebc87@syzkaller.appspotmail.com
Fixes: b91c3e4ea7 ("landlock: Add support for file reparenting with LANDLOCK_ACCESS_FS_REFER")
Closes: https://lore.kernel.org/r/000000000000553d3f0618198200@google.com
Link: https://lore.kernel.org/r/20240516181935.1645983-2-mic@digikod.net
[mic: Fix commit message]
Signed-off-by: Mickaël Salaün <mic@digikod.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-06-21 14:35:43 +02:00
..
apparmor apparmor: Free up __cleanup() name 2024-02-23 09:12:51 +01:00
bpf bpf: Implement task local storage 2020-11-06 08:08:37 -08:00
integrity ima: detect changes to the backing overlay file 2023-11-28 17:07:12 +00:00
keys KEYS: trusted: Do not use WARN when encode fails 2024-05-25 16:21:35 +02:00
landlock landlock: Fix d_parent walk 2024-06-21 14:35:43 +02:00
loadpin LoadPin: Ignore the "contents" argument of the LSM hooks 2022-12-31 13:33:07 +01:00
lockdown lockdown: ratelimit denial messages 2022-09-14 07:37:50 -04:00
safesetid LSM: SafeSetID: Add setgroups() security policy handling 2022-07-15 18:24:42 +00:00
selinux lsm: new security_file_ioctl_compat() hook 2024-01-31 16:17:00 -08:00
smack smack: Handle SMACK64TRANSMUTE in smack_inode_setsecurity() 2024-04-03 15:19:24 +02:00
tomoyo tomoyo: fix UAF write bug in tomoyo_write_control() 2024-03-06 14:45:09 +00:00
yama task_work: cleanup notification modes 2020-10-17 15:05:30 -06:00
commoncap.c capabilities: fix potential memleak on error path from vfs_getxattr_alloc() 2022-10-28 06:44:33 -04:00
device_cgroup.c device_cgroup: Roll back to original exceptions after copy failure 2023-01-07 11:11:56 +01:00
inode.c Merge branch 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2019-07-19 10:42:02 -07:00
Kconfig x86/retbleed: Add fine grained Kconfig knobs 2022-06-29 17:43:41 +02:00
Kconfig.hardening randstruct: disable Clang 15 support 2023-02-25 11:25:43 +01:00
lsm_audit.c lsm: clean up redundant NULL pointer check 2022-08-15 22:44:01 -04:00
Makefile security: remove unneeded subdir-$(CONFIG_...) 2021-09-03 08:17:20 +09:00
min_addr.c sysctl: pass kernel pointers to ->proc_handler 2020-04-27 02:07:40 -04:00
security.c lsm: fix the logic in security_inode_getsecctx() 2024-02-23 09:12:37 +01:00