diff options
| author | Alexey Gladkov <legion@kernel.org> | 2021-04-22 14:27:16 +0200 |
|---|---|---|
| committer | Eric W. Biederman <ebiederm@xmission.com> | 2021-04-30 14:14:03 -0500 |
| commit | c1ada3dc7219b02b3467aa906c2f5f8b098578d1 (patch) | |
| tree | ed42c25748ccbec5d4704b99d4934f1b6c91ffe8 /kernel/ucount.c | |
| parent | e4aebf06695c32d49f1007f9d252f97b5b2998a7 (diff) | |
ucounts: Set ucount_max to the largest positive value the type can hold
The ns->ucount_max[] is signed long which is less than the rlimit size.
We have to protect ucount_max[] from overflow and only use the largest
value that we can hold.
On 32bit using "long" instead of "unsigned long" to hold the counts has
the downside that RLIMIT_MSGQUEUE and RLIMIT_MEMLOCK are limited to 2GiB
instead of 4GiB. I don't think anyone cares but it should be mentioned
in case someone does.
The RLIMIT_NPROC and RLIMIT_SIGPENDING used atomic_t so their maximum
hasn't changed.
Signed-off-by: Alexey Gladkov <legion@kernel.org>
Link: https://lkml.kernel.org/r/1825a5dfa18bc5a570e79feb05e2bd07fd57e7e3.1619094428.git.legion@kernel.org
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Diffstat (limited to 'kernel/ucount.c')
0 files changed, 0 insertions, 0 deletions