CCing John, looks like John's upcoming fix may address this: bpf: sockmap, only stop/flush strp if it was enabled at some point On Tue, 07 May 2019 14:06:06 -0700, syzbot wrote: > Hello, > > syzbot found the following crash on: > > HEAD commit: 71ae5fc8 Merge tag 'linux-kselftest-5.2-rc1' of git://git... > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=136c06f0a00000 > kernel config: https://syzkaller.appspot.com/x/.config?x=511168bc7720867 > dashboard link: https://syzkaller.appspot.com/bug?extid=13d91ed9bbcd7dc13230 > compiler: gcc (GCC) 9.0.0 20181231 (experimental) > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17128012a00000 > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+13d91ed9bbcd7dc13230@xxxxxxxxxxxxxxxxxxxxxxxxx > > ------------[ cut here ]------------ > ODEBUG: assert_init not available (active state 0) object type: timer_list > hint: (null) > WARNING: CPU: 1 PID: 22 at lib/debugobjects.c:325 > debug_print_object+0x16a/0x250 lib/debugobjects.c:325 > Kernel panic - not syncing: panic_on_warn set ... > CPU: 1 PID: 22 Comm: kworker/1:1 Not tainted 5.1.0+ #1 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > Workqueue: events sk_psock_destroy_deferred > Call Trace: > __dump_stack lib/dump_stack.c:77 [inline] > dump_stack+0x172/0x1f0 lib/dump_stack.c:113 > panic+0x2cb/0x65c kernel/panic.c:214 > __warn.cold+0x20/0x45 kernel/panic.c:566 > report_bug+0x263/0x2b0 lib/bug.c:186 > fixup_bug arch/x86/kernel/traps.c:179 [inline] > fixup_bug arch/x86/kernel/traps.c:174 [inline] > do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:272 > do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:291 > invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:972 > RIP: 0010:debug_print_object+0x16a/0x250 lib/debugobjects.c:325 > Code: dd 60 f4 a1 87 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 b5 00 00 00 48 > 8b 14 dd 60 f4 a1 87 48 c7 c7 00 ea a1 87 e8 44 02 12 fe <0f> 0b 83 05 31 > 10 2d 06 01 48 83 c4 20 5b 41 5c 41 5d 41 5e 5d c3 > RSP: 0018:ffff8880a9a3f970 EFLAGS: 00010086 > RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000000000 > RDX: 0000000000000000 RSI: ffffffff815aec76 RDI: ffffed1015347f20 > RBP: ffff8880a9a3f9b0 R08: ffff8880a9a2a5c0 R09: ffffed1015d240f1 > R10: ffffed1015d240f0 R11: ffff8880ae920787 R12: 0000000000000001 > R13: ffffffff889ac720 R14: ffffffff81605b60 R15: ffff8880990fdba8 > debug_object_assert_init lib/debugobjects.c:694 [inline] > debug_object_assert_init+0x23d/0x2f0 lib/debugobjects.c:665 > debug_timer_assert_init kernel/time/timer.c:725 [inline] > debug_assert_init kernel/time/timer.c:770 [inline] > del_timer+0x7c/0x120 kernel/time/timer.c:1192 > try_to_grab_pending+0x2d7/0x710 kernel/workqueue.c:1249 > __cancel_work_timer+0xc4/0x520 kernel/workqueue.c:3079 > cancel_delayed_work_sync+0x1b/0x20 kernel/workqueue.c:3252 > strp_done+0x5d/0xf0 net/strparser/strparser.c:526 > sk_psock_destroy_deferred+0x3a/0x6c0 net/core/skmsg.c:558 > process_one_work+0x98e/0x1790 kernel/workqueue.c:2263 > worker_thread+0x98/0xe40 kernel/workqueue.c:2409 > kthread+0x357/0x430 kernel/kthread.c:253 > ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 > Kernel Offset: disabled > Rebooting in 86400 seconds.. > > > --- > This bug is generated by a bot. It may contain errors. > See https://goo.gl/tpsmEJ for more information about syzbot. > syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. > > syzbot will keep track of this bug report. See: > https://goo.gl/tpsmEJ#status for how to communicate with syzbot. > syzbot can test patches for this bug, for details see: > https://goo.gl/tpsmEJ#testing-patches
