Davidlohr Bueso 8f89c007b6 ipc/shm: fix shmat() nil address after round-down when remapping ... shmat()'s SHM_REMAP option forbids passing a nil address for; this is in fact the very first thing we check for. Andrea reported that for SHM_RND|SHM_REMAP cases we can end up bypassing the initial addr check, but we need to check again if the address was rounded down to nil. As of this patch, such cases will return -EINVAL. Link: http://lkml.kernel.org/r/20180503204934.kk63josdu6u53fbd@linux-n805 Signed-off-by: Davidlohr Bueso <dbueso@suse.de> Reported-by: Andrea Arcangeli <aarcange@redhat.com> Cc: Joe Lawrence <joe.lawrence@redhat.com> Cc: Manfred Spraul <manfred@colorfullife.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2018-05-25 18:12:11 -07:00
..
compat.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
ipc_sysctl.c
Makefile	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
mq_sysctl.c
mqueue.c	Revert "mqueue: switch to on-demand creation of internal mount"	2018-03-24 19:34:23 -05:00
msg.c	ipc/msg: introduce msgctl(MSG_STAT_ANY)	2018-04-11 10:28:37 -07:00
msgutil.c	ipc: convert ipc_namespace.count from atomic_t to refcount_t	2017-09-08 18:26:51 -07:00
namespace.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
sem.c	ipc/sem: introduce semctl(SEM_STAT_ANY)	2018-04-11 10:28:37 -07:00
shm.c	ipc/shm: fix shmat() nil address after round-down when remapping	2018-05-25 18:12:11 -07:00
syscall.c	ipc: add msgsnd syscall/compat_syscall wrappers	2018-04-02 20:15:28 +02:00
util.c	proc: move /proc/sysvipc creation to where it belongs	2018-04-11 10:28:33 -07:00
util.h	Merge branch 'userns-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2018-04-03 19:15:32 -07:00