Andy Lutomirski 653bc77af6 x86_64, entry: Fix out of bounds read on sysenter ... Rusty noticed a Really Bad Bug (tm) in my NT fix. The entry code reads out of bounds, causing the NT fix to be unreliable. But, and this is much, much worse, if your stack is somehow just below the top of the direct map (or a hole), you read out of bounds and crash. Excerpt from the crash: [ 1.129513] RSP: 0018:ffff88001da4bf88 EFLAGS: 00010296 2b:* f7 84 24 90 00 00 00 testl $0x4000,0x90(%rsp) That read is deterministically above the top of the stack. I thought I even single-stepped through this code when I wrote it to check the offset, but I clearly screwed it up. Fixes: 8c7aa698ba ("x86_64, entry: Filter RFLAGS.NT on entry from userspace") Reported-by: Rusty Russell <rusty@ozlabs.org> Cc: stable@vger.kernel.org Signed-off-by: Andy Lutomirski <luto@amacapital.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2014-10-31 18:47:09 -07:00
..
audit.c
ia32_aout.c	handle suicide on late failure exits in execve() in search_binary_handler()	2014-10-09 02:39:00 -04:00
ia32_signal.c	x86, vdso: Reimplement vdso.so preparation in build-time C	2014-05-05 13:18:51 -07:00
ia32entry.S	x86_64, entry: Fix out of bounds read on sysenter	2014-10-31 18:47:09 -07:00
Makefile	merge compat sys_ipc instances	2013-03-03 23:00:27 -05:00
nosyscall.c
sys_ia32.c	unify compat fanotify_mark(2), switch to COMPAT_SYSCALL_DEFINE	2013-05-09 13:46:38 -04:00
syscall_ia32.c