Messages in this thread | | | Date | Thu, 30 Nov 2017 09:20:26 +0100 | From | Peter Zijlstra <> | Subject | Re: BUG: KASAN: slab-out-of-bounds in perf_callchain_user+0x494/0x530 |
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On Thu, Nov 30, 2017 at 10:32:19AM +0800, Fengguang Wu wrote: > Hello, > > FYI this happens in mainline kernel 4.15.0-rc1. > It looks like a new regression and hard to bisect. > > It occurs in 1 out of 57 boots. > > [ 10.009610] chown (367) used greatest stack depth: 26944 bytes left > Kernel tests: Boot OK! > [ 30.357729] trinity-main uses obsolete (PF_INET,SOCK_PACKET) > [ 31.301433] sock: process `trinity-main' is using obsolete setsockopt SO_BSDCOMPAT > [ 31.310289] ================================================================== > [ 31.311490] BUG: KASAN: slab-out-of-bounds in perf_callchain_user+0x494/0x530: > perf_callchain_store at include/linux/perf_event.h:1128 > (inlined by) perf_callchain_user at arch/x86/events/core.c:2485
I don't think we recently changed anything here...
But I do have vague memories of something being off here; I never quite could penetrate the max_stack / contexts_maxed stuff, and istr acme was going to have a peek.
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