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
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arm	This mostly includes the PPC changes for 4.1, which this time cover	2015-04-26 13:06:22 -07:00
arm64	This mostly includes the PPC changes for 4.1, which this time cover	2015-04-26 13:06:22 -07:00
avr32	…
blackfin	…
c6x	…
cris	CRIS changes for 4.1	2015-04-26 13:31:05 -07:00
frv	Devicetree updates for 4.1:	2015-04-24 08:46:18 -07:00
hexagon	…
ia64	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2015-04-26 17:22:07 -07:00
m32r	…
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metag	…
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mn10300	Devicetree updates for 4.1:	2015-04-24 08:46:18 -07:00
nios2	…
openrisc	…
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powerpc	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2015-04-26 17:22:07 -07:00
s390	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2015-04-26 17:22:07 -07:00
score	…
sh	Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma	2015-04-24 09:49:37 -07:00
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unicore32	…
x86	x86_64, asm: Work around AMD SYSRET SS descriptor attribute issue	2015-04-26 17:57:38 -07:00
xtensa	…
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Kconfig	…