diff options
| author | Kees Cook <keescook@chromium.org> | 2017-11-30 03:10:51 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-12-05 13:26:29 +0300 |
| commit | c16a65582a72d3adea145b9b0a737c6c35ce89fc (patch) | |
| tree | d09ff110c25b1653835abf5e335ce08adbd6c1eb /Kconfig | |
| parent | aab681eb8f3bfe2950c8493f39cef6ae34b731b3 (diff) | |
| download | linux-c16a65582a72d3adea145b9b0a737c6c35ce89fc.tar.xz | |
exec: avoid RLIMIT_STACK races with prlimit()
commit 04e35f4495dd560db30c25efca4eecae8ec8c375 upstream.
While the defense-in-depth RLIMIT_STACK limit on setuid processes was
protected against races from other threads calling setrlimit(), I missed
protecting it against races from external processes calling prlimit().
This adds locking around the change and makes sure that rlim_max is set
too.
Link: http://lkml.kernel.org/r/20171127193457.GA11348@beast
Fixes: 64701dee4178e ("exec: Use sane stack rlimit under secureexec")
Signed-off-by: Kees Cook <keescook@chromium.org>
Reported-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Reported-by: Brad Spengler <spender@grsecurity.net>
Acked-by: Serge Hallyn <serge@hallyn.com>
Cc: James Morris <james.l.morris@oracle.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Kconfig')
0 files changed, 0 insertions, 0 deletions