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WARNING in zap_class

Status: auto-closed as invalid on 2020/07/09 01:55
Subsystems: net
[Documentation on labels]
Reported-by: syzbot+740dcc3824577fb40563@syzkaller.appspotmail.com
First crash: 1885d, last: 1512d
▶ ▼ Discussions (1)
Title Replies (including bot) Last reply
WARNING in zap_class 0 (1) 2019/03/25 08:00

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 9841 at kernel/locking/lockdep.c:4816 remove_class_from_lock_chain kernel/locking/lockdep.c:4796 [inline]
WARNING: CPU: 1 PID: 9841 at kernel/locking/lockdep.c:4816 remove_class_from_lock_chains kernel/locking/lockdep.c:4836 [inline]
WARNING: CPU: 1 PID: 9841 at kernel/locking/lockdep.c:4816 zap_class+0x763/0xe50 kernel/locking/lockdep.c:4876
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 9841 Comm: syz-executor.4 Not tainted 5.6.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x188/0x20d lib/dump_stack.c:118
 panic+0x2e3/0x75c kernel/panic.c:221
 __warn.cold+0x2f/0x35 kernel/panic.c:582
 report_bug+0x27b/0x2f0 lib/bug.c:195
 fixup_bug arch/x86/kernel/traps.c:174 [inline]
 fixup_bug arch/x86/kernel/traps.c:169 [inline]
 do_error_trap+0x12b/0x220 arch/x86/kernel/traps.c:267
 do_invalid_op+0x32/0x40 arch/x86/kernel/traps.c:286
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027
RIP: 0010:remove_class_from_lock_chain kernel/locking/lockdep.c:4816 [inline]
RIP: 0010:remove_class_from_lock_chains kernel/locking/lockdep.c:4836 [inline]
RIP: 0010:zap_class+0x763/0xe50 kernel/locking/lockdep.c:4876
Code: c1 e8 03 42 0f b6 14 28 4c 89 e0 83 e0 07 83 c0 01 38 d0 7c 80 84 d2 0f 84 78 ff ff ff 4c 89 e7 e8 02 16 57 00 e9 6b ff ff ff <0f> 0b e8 26 59 34 02 e9 4f fb ff ff 48 89 54 24 20 48 89 4c 24 08
RSP: 0018:ffffc90001b77c10 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffffffff8c043008 RCX: ffffffff838de008
RDX: 0000000000003ed3 RSI: ffffffff838de054 RDI: 0000000000000006
RBP: ffffffff8ba6aa40 R08: ffff888031f7e2c0 R09: fffffbfff180e56f
R10: fffffbfff180e56e R11: ffffffff8c072b77 R12: ffffffff8c046198
R13: dffffc0000000000 R14: ffffffff8bbfe7c0 R15: ffffffff8bbfe7c8
 __lockdep_free_key_range+0x56/0x110 kernel/locking/lockdep.c:4999
 lockdep_unregister_key+0x1f7/0x490 kernel/locking/lockdep.c:5191
 netdev_unregister_lockdep_key net/core/dev.c:9238 [inline]
 free_netdev+0x316/0x4d0 net/core/dev.c:9895
 netdev_run_todo+0x5fc/0x760 net/core/dev.c:9637
 tun_detach drivers/net/tun.c:743 [inline]
 tun_chr_close+0xf5/0x180 drivers/net/tun.c:3459
 __fput+0x2da/0x850 fs/file_table.c:280
 task_work_run+0x13f/0x1b0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop+0x2fa/0x360 arch/x86/entry/common.c:164
 prepare_exit_to_usermode arch/x86/entry/common.c:195 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:278 [inline]
 do_syscall_64+0x6b1/0x7d0 arch/x86/entry/common.c:304
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x416041
Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 04 1b 00 00 c3 48 83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01
RSP: 002b:0000000000c7fbf0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000416041
RDX: 0000001b31020000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000001 R08: 00000000a6ebfd5c R09: 00ffffffffffffff
R10: 0000000000c7fcd0 R11: 0000000000000293 R12: 000000000076bf20
R13: 0000000000770cf8 R14: 00000000001bf8d5 R15: 000000000076bf2c
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (42):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2020/03/08 19:09 upstream 61a09258f2e5 2e9971bb .config console log report ci-upstream-kasan-gce
2020/02/19 03:52 upstream 0a44cac81050 135c18aa .config console log report ci-upstream-kasan-gce-root
2020/02/18 14:58 upstream b1da3acc781c 012fbc32 .config console log report ci-upstream-kasan-gce
2020/02/14 23:57 upstream 2019fc96af22 5d7b90f1 .config console log report ci-upstream-kasan-gce
2020/01/19 16:01 upstream 8f8972a3127f 0342f8c7 .config console log report ci-upstream-kasan-gce
2020/01/15 16:01 upstream 95e20af9fb9c 069a5a44 .config console log report ci-upstream-kasan-gce-selinux-root
2020/01/15 10:54 upstream 95e20af9fb9c fa12bd3c .config console log report ci-upstream-kasan-gce-root
2020/01/14 19:47 upstream e033e7d4a808 fa12bd3c .config console log report ci-upstream-kasan-gce-root
2020/01/14 01:05 upstream b3a987b0264d 32881205 .config console log report ci-upstream-kasan-gce-selinux-root
2020/01/03 23:25 upstream bed723519a72 68256974 .config console log report ci-upstream-kasan-gce-root
2019/12/31 02:06 upstream fd6988496e79 7f117e28 .config console log report ci-upstream-kasan-gce-root
2019/12/07 12:49 upstream eea2d5da29e3 85f26751 .config console log report ci-upstream-kasan-gce-selinux-root
2019/12/05 07:55 upstream aedc0650f913 b2088328 .config console log report ci-upstream-kasan-gce-selinux-root
2019/12/02 06:09 upstream ceb307474506 f879db37 .config console log report ci-upstream-kasan-gce-root
2019/10/28 17:21 upstream 9e5eefba3d09 439d7b14 .config console log report ci-upstream-kasan-gce-selinux-root
2019/10/13 11:11 upstream da94001239cc 2f661ec4 .config console log report ci-upstream-kasan-gce-selinux-root
2019/10/10 23:06 upstream fb20da6af705 1a3bad90 .config console log report ci-upstream-kasan-gce-smack-root
2019/10/08 11:21 upstream eda57a0e4299 28ac6e64 .config console log report ci-upstream-kasan-gce-smack-root
2019/06/28 20:56 upstream 556e2f6020bf 7509bf36 .config console log report ci-upstream-kasan-gce-root
2019/06/28 03:51 upstream c84afab02c31 7509bf36 .config console log report ci-upstream-kasan-gce-selinux-root
2019/04/27 21:32 upstream baf76f0c58ae b617407b .config console log report ci-upstream-kasan-gce-smack-root
2019/04/21 19:17 upstream 085b7755808a b0e8efcb .config console log report ci-upstream-kasan-gce-smack-root
2019/04/15 23:28 upstream 5512320c9f6f 505ab413 .config console log report ci-upstream-kasan-gce-smack-root
2019/04/12 16:59 upstream 8ee15f324866 8916f5e1 .config console log report ci-upstream-kasan-gce-smack-root
2019/03/20 14:08 upstream babf09c3837f a664c187 .config console log report ci-upstream-kasan-gce-selinux-root
2019/03/19 12:39 upstream 9e98c678c2d6 e4549234 .config console log report ci-upstream-kasan-gce-root
2019/03/16 12:43 upstream 9c7dc824d9a4 bab43553 .config console log report ci-upstream-kasan-gce-root
2019/03/14 07:04 upstream fa3d493f7a57 d09a902e .config console log report ci-upstream-kasan-gce-root
2019/03/11 21:41 upstream a089e4fed5c5 12365b99 .config console log report ci-upstream-kasan-gce-selinux-root
2020/03/11 01:54 upstream f35111a94654 35f53e45 .config console log report ci-upstream-kasan-gce-386
2020/02/16 23:57 upstream 11a48a5a18c6 1f448cd6 .config console log report ci-upstream-kasan-gce-386
2020/01/05 12:37 linux-next 7ddd09fc4b74 d646e21f .config console log report ci-upstream-linux-next-kasan-gce-root
2019/12/20 09:02 linux-next 7ddd09fc4b74 e30cbdae .config console log report ci-upstream-linux-next-kasan-gce-root
2019/10/15 11:38 linux-next 0e9d28bc6c81 b5268b89 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/10/10 00:38 linux-next 1ba4389f4572 c4b9981b .config console log report ci-upstream-linux-next-kasan-gce-root
2019/06/14 05:52 linux-next da151e650328 998ccc76 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/06/13 17:51 linux-next da151e650328 a139f92f .config console log report ci-upstream-linux-next-kasan-gce-root
2019/04/22 21:09 linux-next 3f018f4a019a 53199d6e .config console log report ci-upstream-linux-next-kasan-gce-root
2019/04/20 09:59 linux-next 3f018f4a019a b0e8efcb .config console log report ci-upstream-linux-next-kasan-gce-root
2019/03/10 08:10 linux-next cf08baa29613 12365b99 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/03/07 21:13 linux-next cf08baa29613 4b69c3cb .config console log report ci-upstream-linux-next-kasan-gce-root
2019/03/04 05:09 linux-next c63e9e91a254 1c0e457a .config console log report ci-upstream-linux-next-kasan-gce-root
* Struck through repros no longer work on HEAD.