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[5.5,140/257] x86/entry/32: Add missing ASM_CLAC to general_protection entry

Message ID 20200416131343.933102371@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg KH April 16, 2020, 1:23 p.m. UTC 
From: Thomas Gleixner <tglx@linutronix.de>

commit 3d51507f29f2153a658df4a0674ec5b592b62085 upstream.

All exception entry points must have ASM_CLAC right at the
beginning. The general_protection entry is missing one.

Fixes: e59d1b0a2419 ("x86-32, smap: Add STAC/CLAC instructions to 32-bit kernel entry")
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Frederic Weisbecker <frederic@kernel.org>
Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com>
Reviewed-by: Andy Lutomirski <luto@kernel.org>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20200225220216.219537887@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/x86/entry/entry_32.S |    1 +
 1 file changed, 1 insertion(+)
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Patch

--- a/arch/x86/entry/entry_32.S
+++ b/arch/x86/entry/entry_32.S
@@ -1694,6 +1694,7 @@  SYM_CODE_START(int3)
 SYM_CODE_END(int3)
 
 SYM_CODE_START(general_protection)
+	ASM_CLAC
 	pushl	$do_general_protection
 	jmp	common_exception
 SYM_CODE_END(general_protection)