On Tue, Sep 09, 2014 at 01:53:50PM -0400, Vince Weaver wrote: > > OK so trying to use ftrace to track this issue, and this happens (on > core2, 3.17-rc4) > > [ 295.992012] PANIC: double fault, error_code: 0x0 > [ 295.992012] CPU: 1 PID: 2916 Comm: trace-cmd Not tainted 3.17.0-rc4+ #82 > [ 295.992012] Hardware name: AOpen DE7000/nMCP7ALPx-DE R1.06 Oct.19.2012, > BIOS 080015 10/19/2012 > [ 295.992012] task: ffff8800cb20a800 ti: ffff8800ca30c000 task.ti: > ffff8800ca30c000 > [ 295.992012] RIP: 0010:[<ffffffff81037b92>] [<ffffffff81037b92>] > perf_trace_x86_exceptions+0x2d/0xb7 > [ 295.992012] RSP: 0018:ffff8800bfffff58 EFLAGS: 00010082 > [ 295.992012] RAX: 0000000000000001 RBX: ffff880037c9f490 RCX: > 0000000000000000 > [ 295.992012] RDX: ffff8800c0000098 RSI: ffffe8ffffc81010 RDI: > ffffffff81a26600 > [ 295.992012] RBP: ffff8800c0000058 R08: 0000000000044ea5 R09: > ffffe8ffffc81010 > [ 295.992012] R10: 0000000000000000 R11: ffff8800ca30fc48 R12: > ffff8800c0000098 > [ 295.992012] R13: ffffe8ffffc81010 R14: 0000000000000000 R15: > ffffffff81a26600 > [ 295.992012] FS: 00007f4217f82700(0000) GS:ffff88011fc80000(0000) > knlGS:0000000000000000 > [ 295.992012] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b > [ 295.992012] CR2: ffff8800bfffff48 CR3: 00000000ca0b9000 CR4: > 00000000000407e0 > [ 295.992012] DR0: 0000000000000000 DR1: 0000000000000000 DR2: > 0000000000000000 > [ 295.992012] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: > 0000000000000600 > [ 295.992012] Stack: > [ 295.992012] PANIC: double fault, error_code: 0x0 >
Sasha reported something from his KVM based fuzzing, maybe that's the same. But that x86_exceptions thing is interesting, lemme go look at that first.
pgproefGDdmyh.pgp
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