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Groups > linux.kernel > #1532020
| From | Peter Zijlstra <peterz@infradead.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: perf: fuzzer BUG: KASAN: stack-out-of-bounds in __unwind_start |
| Date | 2016-11-29 10:20 +0100 |
| Message-ID | <sIMJY-6yn-23@gated-at.bofh.it> (permalink) |
| References | <sH6a6-5Oe-27@gated-at.bofh.it> <sIC7T-7Cs-11@gated-at.bofh.it> <sIEMq-T5-15@gated-at.bofh.it> <sIJCp-4cE-3@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Mon, Nov 28, 2016 at 11:52:41PM -0600, Josh Poimboeuf wrote:
> > We used to do that, but the resulting NMIs were problematic on some
> > platforms. Perhaps things have gotten better?
>
> Did a little digging on git blame and found the following commit (which
> seems to be the cause of the KASAN warning and missing stack dump):
>
> bc1dce514e9b ("rcu: Don't use NMIs to dump other CPUs' stacks")
>
> I presume this commit is still needed because of the NMI printk deadlock
> issues which were discussed at Kernel Summit. I guess those issues need
> to be sorted out before the above commit can be reverted.
so printk should more or less work from NMI, esp. after:
42a0bb3f7138 ("printk/nmi: generic solution for safe printk in NMI")
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Re: perf: fuzzer BUG: KASAN: stack-out-of-bounds in __unwind_start Josh Poimboeuf <jpoimboe@redhat.com> - 2016-11-28 23:00 +0100
Re: perf: fuzzer BUG: KASAN: stack-out-of-bounds in __unwind_start "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2016-11-29 01:50 +0100
Re: perf: fuzzer BUG: KASAN: stack-out-of-bounds in __unwind_start Josh Poimboeuf <jpoimboe@redhat.com> - 2016-11-29 07:00 +0100
Re: perf: fuzzer BUG: KASAN: stack-out-of-bounds in __unwind_start Peter Zijlstra <peterz@infradead.org> - 2016-11-29 10:20 +0100
Re: perf: fuzzer BUG: KASAN: stack-out-of-bounds in __unwind_start "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2016-11-29 15:10 +0100
Re: perf: fuzzer BUG: KASAN: stack-out-of-bounds in __unwind_start Josh Poimboeuf <jpoimboe@redhat.com> - 2016-11-29 16:10 +0100
Re: perf: fuzzer BUG: KASAN: stack-out-of-bounds in __unwind_start Petr Mladek <pmladek@suse.com> - 2016-11-29 17:20 +0100
Re: perf: fuzzer BUG: KASAN: stack-out-of-bounds in __unwind_start "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2016-11-29 19:10 +0100
Re: perf: fuzzer BUG: KASAN: stack-out-of-bounds in __unwind_start "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2016-11-29 18:00 +0100
Re: perf: fuzzer BUG: KASAN: stack-out-of-bounds in __unwind_start Josh Poimboeuf <jpoimboe@redhat.com> - 2016-11-29 18:20 +0100
Re: perf: fuzzer BUG: KASAN: stack-out-of-bounds in __unwind_start "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2016-11-29 18:40 +0100
Re: perf: fuzzer BUG: KASAN: stack-out-of-bounds in __unwind_start Petr Mladek <pmladek@suse.com> - 2016-11-30 11:00 +0100
Re: perf: fuzzer BUG: KASAN: stack-out-of-bounds in __unwind_start "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2016-11-29 11:30 +0100
Re: perf: fuzzer BUG: KASAN: stack-out-of-bounds in __unwind_start Peter Zijlstra <peterz@infradead.org> - 2016-11-29 13:50 +0100
Re: perf: fuzzer BUG: KASAN: stack-out-of-bounds in __unwind_start "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2016-11-29 16:20 +0100
Re: perf: fuzzer BUG: KASAN: stack-out-of-bounds in __unwind_start Petr Mladek <pmladek@suse.com> - 2016-11-29 17:30 +0100
Re: perf: fuzzer BUG: KASAN: stack-out-of-bounds in __unwind_start Peter Zijlstra <peterz@infradead.org> - 2016-11-29 18:20 +0100
Re: perf: fuzzer BUG: KASAN: stack-out-of-bounds in __unwind_start "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2016-11-29 20:50 +0100
Re: perf: fuzzer BUG: KASAN: stack-out-of-bounds in __unwind_start Peter Zijlstra <peterz@infradead.org> - 2016-11-29 21:00 +0100
Re: perf: fuzzer BUG: KASAN: stack-out-of-bounds in __unwind_start "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2016-11-29 21:10 +0100
Re: perf: fuzzer BUG: KASAN: stack-out-of-bounds in __unwind_start "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2016-11-29 21:40 +0100
Re: perf: fuzzer BUG: KASAN: stack-out-of-bounds in __unwind_start Josh Poimboeuf <jpoimboe@redhat.com> - 2016-11-30 20:20 +0100
Re: perf: fuzzer BUG: KASAN: stack-out-of-bounds in __unwind_start "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2016-11-30 21:00 +0100
Re: perf: fuzzer BUG: KASAN: stack-out-of-bounds in __unwind_start Peter Zijlstra <peterz@infradead.org> - 2016-12-01 07:00 +0100
Re: perf: fuzzer BUG: KASAN: stack-out-of-bounds in __unwind_start "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2016-12-01 13:40 +0100
Re: perf: fuzzer BUG: KASAN: stack-out-of-bounds in __unwind_start Peter Zijlstra <peterz@infradead.org> - 2016-12-01 17:50 +0100
Re: perf: fuzzer BUG: KASAN: stack-out-of-bounds in __unwind_start "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2016-12-01 18:10 +0100
Re: perf: fuzzer BUG: KASAN: stack-out-of-bounds in __unwind_start Petr Mladek <pmladek@suse.com> - 2016-11-30 11:10 +0100
Re: perf: fuzzer BUG: KASAN: stack-out-of-bounds in __unwind_start Peter Zijlstra <peterz@infradead.org> - 2016-11-30 12:10 +0100
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