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| author | Liu, Changcheng <changcheng.liu@intel.com> | 2017-11-17 15:28:20 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-11-17 16:10:02 -0800 |
| commit | 2f9b7e08cb27d6d8d4579bb5301fb0940ff63d19 (patch) | |
| tree | 9d2db1875e418a13b04167f53056da29f6d72f35 /lib/nmi_backtrace.c | |
| parent | 36a3d1dd4e16bcd0d2ddfb4a2ec7092f0ae0d931 (diff) | |
| download | lwn-2f9b7e08cb27d6d8d4579bb5301fb0940ff63d19.tar.gz lwn-2f9b7e08cb27d6d8d4579bb5301fb0940ff63d19.zip | |
lib/nmi_backtrace.c: fix kernel text address leak
Don't leak idle function address in NMI backtrace.
Link: http://lkml.kernel.org/r/20171106165648.GA95243@sofia
Signed-off-by: Liu Changcheng <changcheng.liu@intel.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Reviewed-by: Josh Poimboeuf <jpoimboe@redhat.com>
Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib/nmi_backtrace.c')
| -rw-r--r-- | lib/nmi_backtrace.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/lib/nmi_backtrace.c b/lib/nmi_backtrace.c index 46e4c749e4eb..61a6b5aab07e 100644 --- a/lib/nmi_backtrace.c +++ b/lib/nmi_backtrace.c @@ -93,8 +93,8 @@ bool nmi_cpu_backtrace(struct pt_regs *regs) if (cpumask_test_cpu(cpu, to_cpumask(backtrace_mask))) { arch_spin_lock(&lock); if (regs && cpu_in_idle(instruction_pointer(regs))) { - pr_warn("NMI backtrace for cpu %d skipped: idling at pc %#lx\n", - cpu, instruction_pointer(regs)); + pr_warn("NMI backtrace for cpu %d skipped: idling at %pS\n", + cpu, (void *)instruction_pointer(regs)); } else { pr_warn("NMI backtrace for cpu %d\n", cpu); if (regs) |