Messages in this thread | | | From | Dmitry Vyukov <> | Date | Sun, 5 Nov 2017 11:09:48 +0300 | Subject | Re: WARNING in tracepoint_probe_unregister |
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On Sun, Nov 5, 2017 at 11:05 AM, syzbot <bot+f00b2fc1cf284703bf4107c0ea565aafd9b536d0@syzkaller.appspotmail.com> wrote: > Hello, > > syzkaller hit the following crash on > 36ef71cae353f88fd6e095e2aaa3e5953af1685d > git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.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 > > > WARNING: CPU: 1 PID: 2992 at kernel/tracepoint.c:243 tracepoint_remove_func > kernel/tracepoint.c:243 [inline] > WARNING: CPU: 1 PID: 2992 at kernel/tracepoint.c:243 > tracepoint_probe_unregister+0x6b3/0x870 kernel/tracepoint.c:324 > Kernel panic - not syncing: panic_on_warn set ... > > CPU: 1 PID: 2992 Comm: syzkaller812809 Not tainted 4.14.0-rc5-next-20171018+ > #8 > Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 > Call Trace: > __dump_stack lib/dump_stack.c:16 [inline] > dump_stack+0x194/0x257 lib/dump_stack.c:52 > panic+0x1e4/0x41c kernel/panic.c:183 > __warn+0x1c4/0x1e0 kernel/panic.c:546 > report_bug+0x211/0x2d0 lib/bug.c:183 > fixup_bug+0x40/0x90 arch/x86/kernel/traps.c:177 > do_trap_no_signal arch/x86/kernel/traps.c:211 [inline] > do_trap+0x260/0x390 arch/x86/kernel/traps.c:260 > do_error_trap+0x120/0x390 arch/x86/kernel/traps.c:297 > do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:310 > invalid_op+0x18/0x20 arch/x86/entry/entry_64.S:905 > RIP: 0010:tracepoint_remove_func kernel/tracepoint.c:243 [inline] > RIP: 0010:tracepoint_probe_unregister+0x6b3/0x870 kernel/tracepoint.c:324 > RSP: 0018:ffff8800397df890 EFLAGS: 00010293 > RAX: ffff88003982e8c0 RBX: 00000000fffffffe RCX: ffffffff81710233 > RDX: 0000000000000000 RSI: ffffffff85b679c0 RDI: 0000000000000282 > RBP: ffff8800397df9a8 R08: 0000000000000001 R09: 1ffff100072fbe6e > R10: ffff8800397df880 R11: 0000000000000001 R12: ffffffff8175b5e0 > R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8800397df980 > unregister_trace_block_rq_remap include/trace/events/block.h:602 [inline] > blk_unregister_tracepoints+0x1e/0x160 kernel/trace/blktrace.c:1079 > blk_trace_cleanup+0x28/0x30 kernel/trace/blktrace.c:336 > blk_trace_remove+0x55/0x80 kernel/trace/blktrace.c:348 > sg_ioctl+0x5eb/0x2d90 drivers/scsi/sg.c:1098 > vfs_ioctl fs/ioctl.c:45 [inline] > do_vfs_ioctl+0x1b1/0x1520 fs/ioctl.c:685 > SYSC_ioctl fs/ioctl.c:700 [inline] > SyS_ioctl+0x8f/0xc0 fs/ioctl.c:691 > entry_SYSCALL_64_fastpath+0x1f/0xbe > RIP: 0033:0x4396a9 > RSP: 002b:00007ffd4d3facb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000010 > RAX: ffffffffffffffda RBX: 00000000006ccac0 RCX: 00000000004396a9 > RDX: 000000002002d000 RSI: 4000000000001276 RDI: 0000000000000004 > RBP: 0000000000000082 R08: 00000000000000fe R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000038 > R13: ffffffffffffffff R14: 0000000000401eb0 R15: 0000000000000000 > Dumping ftrace buffer: > (ftrace buffer empty) > Kernel Offset: disabled > Rebooting in 86400 seconds..
Jens, this has the same root cause as "WARNING in tracepoint_probe_register_prio": https://groups.google.com/forum/#!msg/syzkaller-bugs/9IolqTA_NUk/LgLFZ6hQAQAJ right?
> --- > This bug is generated by a dumb bot. It may contain errors. > See https://goo.gl/tpsmEJ for details. > Direct all questions to syzkaller@googlegroups.com. > Please credit me with: Reported-by: syzbot <syzkaller@googlegroups.com> > > 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 > To mark this as a duplicate of another syzbot report, please reply with: > #syz dup: exact-subject-of-another-report > If it's a one-off invalid bug report, please reply with: > #syz invalid > Note: if the crash happens again, it will cause creation of a new bug > report. > Note: all commands must start from beginning of the line. > > -- > You received this message because you are subscribed to the Google Groups > "syzkaller-bugs" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to syzkaller-bugs+unsubscribe@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/syzkaller-bugs/001a114089d6731471055d37cb25%40google.com. > For more options, visit https://groups.google.com/d/optout.
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