]> git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/commit
ipc: IPCMNI limit check for semmni
authorWaiman Long <longman@redhat.com>
Tue, 30 Oct 2018 22:07:24 +0000 (15:07 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 31 Oct 2018 15:54:14 +0000 (08:54 -0700)
commit8c81ddd2acd2c10979f5a64f6784ce7c6717495e
tree753eefd7695e89bd0667bb877123be642c134642
parent6730e6580177d13f4612767873cb5a533ad63c61
ipc: IPCMNI limit check for semmni

For SysV semaphores, the semmni value is the last part of the 4-element
sem number array.  To make semmni behave in a similar way to msgmni and
shmmni, we can't directly use the _minmax handler.  Instead, a special sem
specific handler is added to check the last argument to make sure that it
is limited to the [0, IPCMNI] range.  An error will be returned if this is
not the case.

Link: http://lkml.kernel.org/r/1536352137-12003-3-git-send-email-longman@redhat.com
Signed-off-by: Waiman Long <longman@redhat.com>
Reviewed-by: Davidlohr Bueso <dave@stgolabs.net>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Kees Cook <keescook@chromium.org>
Cc: Luis R. Rodriguez <mcgrof@kernel.org>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
ipc/ipc_sysctl.c
ipc/util.h