syzbot


WARNING: locking bug in lock_sock_nested

Status: upstream: reported syz repro on 2019/05/01 12:10
Reported-by: syzbot+484d48a66e9695604115@syzkaller.appspotmail.com
First crash: 1878d, last: 1470d
Fix bisection the fix commit could be any of (bisect log):
  fa5941f45d7e Linux 4.14.114
  56dfe6252c68 Linux 4.14.188
  
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING: locking bug in lock_sock_nested syz done error 24 944d 1895d 0/27 auto-obsoleted due to no activity on 2023/04/22 14:43
android-44 WARNING: locking bug in lock_sock_nested syz 3 2247d 1896d 0/2 public: reported syz repro on 2019/04/14 00:02
Last patch testing requests (2)
Created Duration User Patch Repo Result
2023/01/25 12:32 10m retest repro linux-4.14.y report log
2022/09/07 17:27 8m retest repro linux-4.14.y report log
Fix bisection attempts (8)
Created Duration User Patch Repo Result
2020/07/13 09:22 37m bisect fix linux-4.14.y job log (2)
2020/06/13 08:32 33m bisect fix linux-4.14.y job log (0) log
2020/05/14 04:19 36m bisect fix linux-4.14.y job log (0) log
2020/04/14 03:42 36m bisect fix linux-4.14.y job log (0) log
2020/03/15 03:03 38m bisect fix linux-4.14.y job log (0) log
2020/02/13 22:49 33m bisect fix linux-4.14.y job log (0) log
2020/01/14 18:22 37m bisect fix linux-4.14.y job log (0) log
2019/12/15 17:47 35m bisect fix linux-4.14.y job log (0) log

Sample crash report:
IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready
IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready
8021q: adding VLAN 0 to HW filter on device batadv0
IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready
------------[ cut here ]------------
WARNING: CPU: 0 PID: 7255 at kernel/locking/lockdep.c:722 arch_local_save_flags arch/x86/include/asm/paravirt.h:773 [inline]
WARNING: CPU: 0 PID: 7255 at kernel/locking/lockdep.c:722 arch_local_save_flags arch/x86/include/asm/paravirt.h:771 [inline]
WARNING: CPU: 0 PID: 7255 at kernel/locking/lockdep.c:722 look_up_lock_class kernel/locking/lockdep.c:713 [inline]
WARNING: CPU: 0 PID: 7255 at kernel/locking/lockdep.c:722 register_lock_class+0xd80/0x1730 kernel/locking/lockdep.c:756
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 7255 Comm: syz-executor.0 Not tainted 4.14.114 #4
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x138/0x19c lib/dump_stack.c:53
 panic+0x1f2/0x438 kernel/panic.c:182
 __warn.cold+0x2f/0x34 kernel/panic.c:546
 report_bug+0x216/0x254 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:177 [inline]
 fixup_bug arch/x86/kernel/traps.c:172 [inline]
 do_error_trap+0x1bb/0x310 arch/x86/kernel/traps.c:295
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:314
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:944
RIP: 0010:look_up_lock_class kernel/locking/lockdep.c:722 [inline]
RIP: 0010:register_lock_class+0xd80/0x1730 kernel/locking/lockdep.c:756
RSP: 0018:ffff8880a6fb7a00 EFLAGS: 00010083
RAX: dffffc0000000000 RBX: ffffffff891a5680 RCX: ffff8880903c11e0
RDX: 1ffff1101207823f RSI: 1ffffffff11a4f4c RDI: ffff8880903c11f8
RBP: ffff8880a6fb7ac0 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff88cbff90 R11: 0000000000000000 R12: ffffffff88d27a40
R13: 1ffff11014df6f4b R14: ffffffff86ee83c0 R15: 0000000000000000
 __lock_acquire+0x147/0x45e0 kernel/locking/lockdep.c:3374
 lock_acquire+0x16f/0x430 kernel/locking/lockdep.c:3991
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline]
 _raw_spin_lock_bh+0x33/0x50 kernel/locking/spinlock.c:176
 spin_lock_bh include/linux/spinlock.h:322 [inline]
 lock_sock_nested+0x3f/0x110 net/core/sock.c:2760
 lock_sock include/net/sock.h:1462 [inline]
 inet_autobind+0x20/0x190 net/ipv4/af_inet.c:178
 inet_dgram_connect+0x13b/0x1f0 net/ipv4/af_inet.c:538
 SYSC_connect+0x1f8/0x2d0 net/socket.c:1655
 SyS_connect+0x24/0x30 net/socket.c:1636
 do_syscall_64+0x1eb/0x630 arch/x86/entry/common.c:289
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x458da9
RSP: 002b:00007f2e662ccc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458da9
RDX: 000000000000001c RSI: 0000000020000080 RDI: 0000000000000008
RBP: 000000000073bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2e662cd6d4
R13: 00000000004bf1f1 R14: 00000000004d02c0 R15: 00000000ffffffff
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/05/01 11:09 linux-4.14.y fa5941f45d7e 618456b4 .config console log report syz ci2-linux-4-14
* Struck through repros no longer work on HEAD.