On Thu, May 15, 2014 at 04:27:24PM +0200, Mateusz Guzik wrote: > On Thu, May 15, 2014 at 03:38:34PM +0200, Peter Zijlstra wrote: > > Hi Thomas, Oleg, > > > > > > trinity$ MALLOC_CHECK_=0 ./trinity -xinit_module -xreboot -xshutdown > > -xunshare -xnfsservctl -xclock_nanosleep -xuselib -xumount -xmount -m > > --quiet -C 400 -l off -xmremap > > > > [watchdog] kernel became tainted! (512/0) Last seed was 4072360471 > > > > [15908.562512] ------------[ cut here ]------------ > > [15908.567245] WARNING: CPU: 22 PID: 3312 at > > /usr/src/linux-2.6/kernel/signal.c:3060 do_rt_tgsigqueueinfo+0xb4/0xc0() > > [15908.577715] Modules linked in: > > [15908.580857] CPU: 22 PID: 3312 Comm: trinity-c198 Not tainted > > 3.15.0-rc5-01700-g505011124ad0-dirty #1070 > > [15908.590412] Hardware name: Supermicro X8DTN/X8DTN, BIOS 4.6.3 01/08/2010 > > [15908.597228] 0000000000000009 ffff880428715e40 ffffffff81682052 > > 0000000000000000 > > [15908.604834] ffff880428715e78 ffffffff8109808c 0000000000000001 > > 000000000000ffff > > [15908.612402] 00000000efdcefbf 00000000efdcefbf 0000000000000129 > > ffff880428715e88 > > [15908.619941] Call Trace: > > [15908.622423] [<ffffffff81682052>] dump_stack+0x4e/0x7a > > [15908.627600] [<ffffffff8109808c>] warn_slowpath_common+0x8c/0xc0 > > [15908.633658] [<ffffffff810980da>] warn_slowpath_null+0x1a/0x20 > > [15908.639535] [<ffffffff810a9914>] do_rt_tgsigqueueinfo+0xb4/0xc0 > > [15908.645591] [<ffffffff810a99f1>] SYSC_rt_tgsigqueueinfo+0x61/0x80 > > [15908.651851] [<ffffffff810abb2e>] SyS_rt_tgsigqueueinfo+0xe/0x10 > > [15908.657946] [<ffffffff8168a842>] system_call_fastpath+0x16/0x1b > > [15908.664036] ---[ end trace 02450728e2526283 ]--- > > > > > > This is apparently a very common thing to hit according to google. > > Well, it warns about an argument received from userland, so nothing fishy > going on as far as kernel consistency is concerned if that's what you mean.
I hadn't looked that far.. I just manged to hit it two times in a row while waiting for my bug to trigger.
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