Andy Lutomirski 61f01dd941 x86_64, asm: Work around AMD SYSRET SS descriptor attribute issue ... AMD CPUs don't reinitialize the SS descriptor on SYSRET, so SYSRET with SS == 0 results in an invalid usermode state in which SS is apparently equal to __USER_DS but causes #SS if used. Work around the issue by setting SS to __KERNEL_DS __switch_to, thus ensuring that SYSRET never happens with SS set to NULL. This was exposed by a recent vDSO cleanup. Fixes: e7d6eefaaa x86/vdso32/syscall.S: Do not load __USER32_DS to %ss Signed-off-by: Andy Lutomirski <luto@kernel.org> Cc: Peter Anvin <hpa@zytor.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Denys Vlasenko <vda.linux@googlemail.com> Cc: Brian Gerst <brgerst@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2015-04-26 17:57:38 -07:00
..
Makefile	x86/compat: Merge native and compat 32-bit syscall tables	2015-03-04 06:16:21 +01:00
audit.c	x86: hook up execveat system call	2014-12-13 12:42:51 -08:00
ia32_aout.c	assorted conversions to %p[dD]	2014-11-19 13:01:20 -05:00
ia32_signal.c	x86/signal: Remove pax argument from restore_sigcontext	2015-04-06 09:06:39 +02:00
ia32entry.S	x86_64, asm: Work around AMD SYSRET SS descriptor attribute issue	2015-04-26 17:57:38 -07:00
sys_ia32.c	x86/compat: Remove sys32_vm86_warning	2015-03-04 06:16:21 +01:00