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| author | Alexey Gladkov <legion@kernel.org> | 2021-04-22 14:27:13 +0200 |
|---|---|---|
| committer | Eric W. Biederman <ebiederm@xmission.com> | 2021-04-30 14:14:02 -0500 |
| commit | d64696905554e919321e31afc210606653b8f6a4 (patch) | |
| tree | 7c153f685f7e89823fc6c0b3e420d8fff12037df /kernel/user_namespace.c | |
| parent | 6e52a9f0532f912af37bab4caf18b57d1b9845f4 (diff) | |
| download | lwn-d64696905554e919321e31afc210606653b8f6a4.tar.gz lwn-d64696905554e919321e31afc210606653b8f6a4.zip | |
Reimplement RLIMIT_SIGPENDING on top of ucounts
The rlimit counter is tied to uid in the user_namespace. This allows
rlimit values to be specified in userns even if they are already
globally exceeded by the user. However, the value of the previous
user_namespaces cannot be exceeded.
Changelog
v11:
* Revert most of changes to fix performance issues.
v10:
* Fix memory leak on get_ucounts failure.
Signed-off-by: Alexey Gladkov <legion@kernel.org>
Link: https://lkml.kernel.org/r/df9d7764dddd50f28616b7840de74ec0f81711a8.1619094428.git.legion@kernel.org
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Diffstat (limited to 'kernel/user_namespace.c')
| -rw-r--r-- | kernel/user_namespace.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/user_namespace.c b/kernel/user_namespace.c index 7eccc4f84549..822eacee4588 100644 --- a/kernel/user_namespace.c +++ b/kernel/user_namespace.c @@ -124,6 +124,7 @@ int create_user_ns(struct cred *new) } ns->ucount_max[UCOUNT_RLIMIT_NPROC] = rlimit(RLIMIT_NPROC); ns->ucount_max[UCOUNT_RLIMIT_MSGQUEUE] = rlimit(RLIMIT_MSGQUEUE); + ns->ucount_max[UCOUNT_RLIMIT_SIGPENDING] = rlimit(RLIMIT_SIGPENDING); ns->ucounts = ucounts; /* Inherit USERNS_SETGROUPS_ALLOWED from our parent */ |