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author | Andy Lutomirski <luto@kernel.org> | 2017-12-04 15:07:27 +0100 |
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committer | Ingo Molnar <mingo@kernel.org> | 2017-12-17 14:27:51 +0100 |
commit | 7fbbd5cbebf118a9e09f5453f686656a167c3d1c (patch) | |
tree | 93baa3bc3d3dd933d75ba5336674e78e3f328b7b /arch/x86/kernel/process.c | |
parent | 40e7f949e0d9a33968ebde5d67f7e3a47c97742a (diff) | |
download | linux-stable-7fbbd5cbebf118a9e09f5453f686656a167c3d1c.tar.gz linux-stable-7fbbd5cbebf118a9e09f5453f686656a167c3d1c.tar.bz2 linux-stable-7fbbd5cbebf118a9e09f5453f686656a167c3d1c.zip |
x86/entry/64: Remove the SYSENTER stack canary
Now that the SYSENTER stack has a guard page, there's no need for a canary
to detect overflow after the fact.
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Borislav Petkov <bp@suse.de>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Borislav Petkov <bpetkov@suse.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David Laight <David.Laight@aculab.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Eduardo Valentin <eduval@amazon.com>
Cc: Greg KH <gregkh@linuxfoundation.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: aliguori@amazon.com
Cc: daniel.gruss@iaik.tugraz.at
Cc: hughd@google.com
Cc: keescook@google.com
Link: https://lkml.kernel.org/r/20171204150606.572577316@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/kernel/process.c')
-rw-r--r-- | arch/x86/kernel/process.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c index 86e83762e3b3..6a04287f222b 100644 --- a/arch/x86/kernel/process.c +++ b/arch/x86/kernel/process.c @@ -81,7 +81,6 @@ __visible DEFINE_PER_CPU_SHARED_ALIGNED(struct tss_struct, cpu_tss) = { */ .io_bitmap = { [0 ... IO_BITMAP_LONGS] = ~0 }, #endif - .SYSENTER_stack_canary = STACK_END_MAGIC, }; EXPORT_PER_CPU_SYMBOL(cpu_tss); |