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authorLinus Torvalds <torvalds@linux-foundation.org>2017-09-04 11:18:17 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2017-09-04 11:18:17 -0700
commit6c51e67b64d169419fb13318035bb442f9176612 (patch)
treeae6c64a9d703983f9df5f72e74419de2e388e32b /arch/x86/entry
parente0a195b5225e1285806622cc146dc5c3312fb392 (diff)
parentcf7de27ab35172a9240f079477cae3146a182998 (diff)
Merge branch 'x86-syscall-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull syscall updates from Ingo Molnar: "Improve the security of set_fs(): we now check the address limit on a number of key platforms (x86, arm, arm64) before returning to user-space - without adding overhead to the typical system call fast path" * 'x86-syscall-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: arm64/syscalls: Check address limit on user-mode return arm/syscalls: Check address limit on user-mode return x86/syscalls: Check address limit on user-mode return
Diffstat (limited to 'arch/x86/entry')
-rw-r--r--arch/x86/entry/common.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/entry/common.c b/arch/x86/entry/common.c
index cdefcfdd9e63..03505ffbe1b6 100644
--- a/arch/x86/entry/common.c
+++ b/arch/x86/entry/common.c
@@ -23,6 +23,7 @@
#include <linux/user-return-notifier.h>
#include <linux/uprobes.h>
#include <linux/livepatch.h>
+#include <linux/syscalls.h>
#include <asm/desc.h>
#include <asm/traps.h>
@@ -183,6 +184,8 @@ __visible inline void prepare_exit_to_usermode(struct pt_regs *regs)
struct thread_info *ti = current_thread_info();
u32 cached_flags;
+ addr_limit_user_check();
+
if (IS_ENABLED(CONFIG_PROVE_LOCKING) && WARN_ON(!irqs_disabled()))
local_irq_disable();