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authorEric W. Biederman <ebiederm@xmission.com>2021-10-16 20:30:00 +0300
committerEric W. Biederman <ebiederm@xmission.com>2021-10-19 19:01:52 +0300
commit629715adc62b0ad27ab04d0aa73a71927f886910 (patch)
tree9a748fa28329aaf1eb4ff72bb86e496b0e8f8976 /kernel
parent15bc01effefe97757ef02ca09e9d1b927ab22725 (diff)
downloadlinux-629715adc62b0ad27ab04d0aa73a71927f886910.tar.xz
ucounts: Pair inc_rlimit_ucounts with dec_rlimit_ucoutns in commit_creds
The purpose of inc_rlimit_ucounts and dec_rlimit_ucounts in commit_creds is to change which rlimit counter is used to track a process when the credentials changes. Use the same test for both to guarantee the tracking is correct. Cc: stable@vger.kernel.org Fixes: 21d1c5e386bc ("Reimplement RLIMIT_NPROC on top of ucounts") Link: https://lkml.kernel.org/r/87v91us0w4.fsf_-_@disp2133 Tested-by: Yu Zhao <yuzhao@google.com> Reviewed-by: Alexey Gladkov <legion@kernel.org> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/cred.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/cred.c b/kernel/cred.c
index f784e08c2fbd..3d163bfd64a9 100644
--- a/kernel/cred.c
+++ b/kernel/cred.c
@@ -501,7 +501,7 @@ int commit_creds(struct cred *new)
inc_rlimit_ucounts(new->ucounts, UCOUNT_RLIMIT_NPROC, 1);
rcu_assign_pointer(task->real_cred, new);
rcu_assign_pointer(task->cred, new);
- if (new->user != old->user)
+ if (new->user != old->user || new->user_ns != old->user_ns)
dec_rlimit_ucounts(old->ucounts, UCOUNT_RLIMIT_NPROC, 1);
alter_cred_subscribers(old, -2);