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Groups > linux.kernel > #1507103
| From | Peter Zijlstra <peterz@infradead.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: perf: perf_fuzzer triggers vmalloc_fault (then crashes) |
| Date | 2016-10-24 13:20 +0200 |
| Message-ID | <svLsm-6Te-17@gated-at.bofh.it> (permalink) |
| References | <suUR3-6ge-3@gated-at.bofh.it> <svKwi-6el-31@gated-at.bofh.it> <svLsl-6Te-1@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Mon, Oct 24, 2016 at 06:14:02AM -0500, Josh Poimboeuf wrote: > > Josh, Andy, any clue on how I should go about fixing this? > > This is a bug in the unwinder. The NMI hit in the entry code right > after setting up the stack pointer from cpu_current_top_of_stack, so the > kernel stack was empty. __unwind_start() tried to dereference the > pointer (0xffffc90008500000) at the top of the stack. I'll make a > patch. Great, thanks!
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perf: perf_fuzzer triggers vmalloc_fault (then crashes) Vince Weaver <vincent.weaver@maine.edu> - 2016-10-22 05:10 +0200
Re: perf: perf_fuzzer triggers vmalloc_fault (then crashes) Peter Zijlstra <peterz@infradead.org> - 2016-10-24 12:20 +0200
Re: perf: perf_fuzzer triggers vmalloc_fault (then crashes) Josh Poimboeuf <jpoimboe@redhat.com> - 2016-10-24 13:20 +0200
Re: perf: perf_fuzzer triggers vmalloc_fault (then crashes) Peter Zijlstra <peterz@infradead.org> - 2016-10-24 13:20 +0200
[PATCH] x86/unwind: fix empty stack dereference in guess unwinder Josh Poimboeuf <jpoimboe@redhat.com> - 2016-10-24 15:40 +0200
[tip:x86/urgent] x86/unwind: Fix empty stack dereference in guess unwinder tip-bot for Josh Poimboeuf <tipbot@zytor.com> - 2016-10-25 12:40 +0200
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