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| author | Ondrej Mosnacek <omosnace@redhat.com> | 2023-07-18 13:56:07 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-08-03 10:23:48 +0200 |
| commit | 04f7d4917471f77d87568145b646d12f51342e8d (patch) | |
| tree | 6ab292eb32e9a43ce35fcb11a52bbf544a088ce3 /io_uring | |
| parent | 017f686bcb536ff23d49c143fdf9d1fd89a9a924 (diff) | |
| download | linux-04f7d4917471f77d87568145b646d12f51342e8d.tar.gz | |
io_uring: don't audit the capability check in io_uring_create()
[ Upstream commit 6adc2272aaaf84f34b652cf77f770c6fcc4b8336 ]
The check being unconditional may lead to unwanted denials reported by
LSMs when a process has the capability granted by DAC, but denied by an
LSM. In the case of SELinux such denials are a problem, since they can't
be effectively filtered out via the policy and when not silenced, they
produce noise that may hide a true problem or an attack.
Since not having the capability merely means that the created io_uring
context will be accounted against the current user's RLIMIT_MEMLOCK
limit, we can disable auditing of denials for this check by using
ns_capable_noaudit() instead of capable().
Fixes: 2b188cc1bb85 ("Add io_uring IO interface")
Link: https://bugzilla.redhat.com/show_bug.cgi?id=2193317
Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com>
Reviewed-by: Jeff Moyer <jmoyer@redhat.com>
Link: https://lore.kernel.org/r/20230718115607.65652-1-omosnace@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'io_uring')
| -rw-r--r-- | io_uring/io_uring.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c index bd7b8cf8bc67..f091153bc854 100644 --- a/io_uring/io_uring.c +++ b/io_uring/io_uring.c @@ -3477,7 +3477,7 @@ static __cold int io_uring_create(unsigned entries, struct io_uring_params *p, ctx->syscall_iopoll = 1; ctx->compat = in_compat_syscall(); - if (!capable(CAP_IPC_LOCK)) + if (!ns_capable_noaudit(&init_user_ns, CAP_IPC_LOCK)) ctx->user = get_uid(current_user()); /* |