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| author | Daniel Micay <danielmicay@gmail.com> | 2017-05-04 09:32:09 -0400 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-05-05 08:05:13 +0200 |
| commit | 5ea30e4e58040cfd6434c2f33dc3ea76e2c15b05 (patch) | |
| tree | 050d8d790a8434e1379b525f2f0aa33d1370b610 /kernel/fork.c | |
| parent | d3b5d35290d729a2518af00feca867385a1b08fa (diff) | |
| download | lwn-5ea30e4e58040cfd6434c2f33dc3ea76e2c15b05.tar.gz lwn-5ea30e4e58040cfd6434c2f33dc3ea76e2c15b05.zip | |
stackprotector: Increase the per-task stack canary's random range from 32 bits to 64 bits on 64-bit platforms
The stack canary is an 'unsigned long' and should be fully initialized to
random data rather than only 32 bits of random data.
Signed-off-by: Daniel Micay <danielmicay@gmail.com>
Acked-by: Arjan van de Ven <arjan@linux.intel.com>
Acked-by: Rik van Riel <riel@redhat.com>
Acked-by: Kees Cook <keescook@chromium.org>
Cc: Arjan van Ven <arjan@linux.intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: kernel-hardening@lists.openwall.com
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/20170504133209.3053-1-danielmicay@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/fork.c')
| -rw-r--r-- | kernel/fork.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/fork.c b/kernel/fork.c index 3a4343cdfe90..d681f8f10d2d 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -536,7 +536,7 @@ static struct task_struct *dup_task_struct(struct task_struct *orig, int node) set_task_stack_end_magic(tsk); #ifdef CONFIG_CC_STACKPROTECTOR - tsk->stack_canary = get_random_int(); + tsk->stack_canary = get_random_long(); #endif /* |