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
..
Makefile	merge compat sys_ipc instances	2013-03-03 23:00:27 -05:00
audit.c	x86: coding style fixes in arch/x86/ia32/audit.c	2008-01-30 13:32:54 +01:00
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
nosyscall.c	x86-64, ia32: Move compat_ni_syscall into C and its own file	2011-11-17 13:35:35 -08:00
sys_ia32.c	unify compat fanotify_mark(2), switch to COMPAT_SYSCALL_DEFINE	2013-05-09 13:46:38 -04:00
syscall_ia32.c	x86, syscall: Re-fix typo in comment	2011-11-18 16:25:07 -08:00