On Tue, Dec 26, 2017 at 1:55 AM, Wanpeng Li <kernellwp@xxxxxxxxx> wrote: > 2017-12-26 8:22 GMT+08:00 syzbot > <syzbot+adbefe6736a5b37af36f19ebfa8764fcdd9ddaed@xxxxxxxxxxxxxxxxxxxxxxxxx>: >> syzkaller has found reproducer for the following crash on >> 464e1d5f23cca236b930ef068c328a64cab78fb1 >> git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/master >> compiler: gcc (GCC) 7.1.1 20170620 >> .config is attached >> Raw console output is attached. >> C reproducer is attached >> syzkaller reproducer is attached. See https://goo.gl/kgGztJ >> for information about syzkaller reproducers >> > > https://git.kernel.org/pub/scm/virt/kvm/kvm.git/commit/?h=queue&id=ed3b37ac63a060bdc184d126c0655c1af8b6de62 > > There is a fix in kvm/queue. Hi Wanpeng, syzbot does not know about the fix and still thinks that this bug is open. Please tell it about the fix: > syzbot will keep track of this bug report. > Once a fix for this bug is committed, please reply to this email with: > #syz fix: exact-commit-title > Note: all commands must start from beginning of the line. >> WARNING: CPU: 0 PID: 3356 at arch/x86/kernel/traps.c:801 >> cond_local_irq_disable arch/x86/kernel/traps.c:86 [inline] >> WARNING: CPU: 0 PID: 3356 at arch/x86/kernel/traps.c:801 >> do_debug+0x4d8/0x6e0 arch/x86/kernel/traps.c:815 >> Kernel panic - not syncing: panic_on_warn set ... >> >> CPU: 0 PID: 3356 Comm: syzkaller834441 Not tainted 4.15.0-rc5+ #237 >> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS >> Google 01/01/2011 >> Call Trace: >> <#DB> >> __dump_stack lib/dump_stack.c:17 [inline] >> dump_stack+0x194/0x257 lib/dump_stack.c:53 >> panic+0x1e4/0x41c kernel/panic.c:183 >> __warn+0x1dc/0x200 kernel/panic.c:547 >> report_bug+0x211/0x2d0 lib/bug.c:184 >> fixup_bug.part.11+0x37/0x80 arch/x86/kernel/traps.c:178 >> fixup_bug arch/x86/kernel/traps.c:247 [inline] >> do_error_trap+0x2d7/0x3e0 arch/x86/kernel/traps.c:296 >> do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315 >> invalid_op+0x22/0x40 arch/x86/entry/entry_64.S:1061 >> RIP: 0010:cond_local_irq_disable arch/x86/kernel/traps.c:86 [inline] >> RIP: 0010:do_debug+0x4d8/0x6e0 arch/x86/kernel/traps.c:815 >> RSP: 0018:fffffe800000ee98 EFLAGS: 00010246 >> RAX: dffffc0000000000 RBX: fffffe800000ef58 RCX: 0000000000000000 >> RDX: 1fffffd000001dfc RSI: 0000000000000001 RDI: ffffffff85ec81f8 >> RBP: fffffe800000ef48 R08: fffffe800000efe8 R09: 0000000000000000 >> R10: 0000000000000000 R11: 0000000000000000 R12: 000000000000e003 >> R13: ffff8801c2340040 R14: 1fffffd000001dd8 R15: 0000000000004000 >> debug+0x34/0x60 arch/x86/entry/entry_64.S:1214 >> RIP: 0010:__put_user_8+0x1f/0x25 arch/x86/lib/putuser.S:83 >> RSP: 0018:ffff8801c9f8ff28 EFLAGS: 00000293 >> RAX: 000000005a4195b6 RBX: 00007fffffffeff9 RCX: 0000000020000000 >> RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000282 >> RBP: ffff8801c9f8ff48 R08: 0000000000000000 R09: 1ffff100393f1fc2 >> R10: ffff8801c9f8fdd8 R11: 0000000000000000 R12: 000000005a4195b6 >> R13: 0000000020000000 R14: 00007f2c937f99c0 R15: 0000000000000001 >> </#DB> >> entry_SYSCALL_64_fastpath+0x1f/0x96 >> RIP: 0033:0x44aef9 >> RSP: 002b:00007f2c937f8ce8 EFLAGS: 00000206 ORIG_RAX: 00000000000000c9 >> RAX: ffffffffffffffda RBX: 00000000006dcc24 RCX: 000000000044aef9 >> RDX: 000000000044aef9 RSI: 000000000044aef9 RDI: 0000000020000000 >> RBP: 00000000006dcc20 R08: 0000000000000000 R09: 0000000000000000 >> R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 >> R13: 00007ffe9191073f R14: 00007f2c937f99c0 R15: 0000000000000001 >> >> Dumping ftrace buffer: >> (ftrace buffer empty) >> Kernel Offset: disabled >> Rebooting in 86400 seconds.. >>
