bisecting fixing commit since f2bc9c908dfe3f56fe4ca4d92e5c5be80963b973
building syzkaller on 618456b4f4f74528ac6b9d709b1870d0e1d70eb2
testing commit f2bc9c908dfe3f56fe4ca4d92e5c5be80963b973 with gcc (GCC) 8.1.0
kernel signature: 6b1abe504c32d2d8d36c175a8fa3cb090b4156ee
all runs: crashed: WARNING: locking bug in inet_autobind
testing current HEAD 2187f215ebaac73ddbd814696d7c7fa34f0c3de0
testing commit 2187f215ebaac73ddbd814696d7c7fa34f0c3de0 with gcc (GCC) 8.1.0
kernel signature: 09e3abaf8fc9cb059d15497ac9071dcb132edd3c
run #0: crashed: WARNING: locking bug in inet_autobind
run #1: crashed: WARNING: locking bug in inet_autobind
run #2: crashed: WARNING: locking bug in inet_autobind
run #3: crashed: WARNING: locking bug in inet_autobind
run #4: crashed: WARNING: locking bug in inet_autobind
run #5: crashed: WARNING: locking bug in inet_autobind
run #6: OK
run #7: OK
run #8: OK
run #9: OK
revisions tested: 2, total time: 30m7.520345377s (build: 10m43.238190463s, test: 18m35.223778936s)
the crash still happens on HEAD
commit msg: Merge tag 'for-5.5-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
crash: WARNING: locking bug in inet_autobind
------------[ cut here ]------------
WARNING: CPU: 0 PID: 30164 at kernel/locking/lockdep.c:841 look_up_lock_class kernel/locking/lockdep.c:840 [inline]
WARNING: CPU: 0 PID: 30164 at kernel/locking/lockdep.c:841 register_lock_class+0x296/0x22d0 kernel/locking/lockdep.c:1185
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 30164 Comm: syz-executor.4 Not tainted 5.5.0-rc2-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+0x12d/0x187 lib/dump_stack.c:118
 panic+0x22a/0x4f5 kernel/panic.c:221
 __warn.cold.10+0x25/0x28 kernel/panic.c:582
 report_bug+0x1b0/0x270 lib/bug.c:195
 fixup_bug arch/x86/kernel/traps.c:174 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:267
 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:286
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027
RIP: 0010:look_up_lock_class kernel/locking/lockdep.c:840 [inline]
RIP: 0010:register_lock_class+0x296/0x22d0 kernel/locking/lockdep.c:1185
Code: 8d aa 08 74 27 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 80 3c 02 00 0f 85 be 16 00 00 49 81 3c 24 a0 bc 54 89 74 02 <0f> 0b 45 85 c0 0f 84 67 03 00 00 41 83 e1 01 0f 85 5d 03 00 00 41
RSP: 0018:ffff88808425fa58 EFLAGS: 00010006
RAX: dffffc0000000000 RBX: ffffffff89c9a030 RCX: 1ffff1101084bf55
RDX: 1ffff11015239614 RSI: 1ffffffff13f9f0c RDI: ffff8880a91cb0b8
RBP: ffff88808425fb30 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: ffff88808f54a080 R12: ffff8880a91cb0a0
R13: 0000000000000003 R14: 0000000000000000 R15: ffffffff87c8d900
 __lock_acquire+0xff/0x4ef0 kernel/locking/lockdep.c:3837
 lock_acquire+0x194/0x410 kernel/locking/lockdep.c:4485
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline]
 _raw_spin_lock_bh+0x31/0x40 kernel/locking/spinlock.c:175
 spin_lock_bh include/linux/spinlock.h:343 [inline]
 lock_sock_nested+0x3a/0x100 net/core/sock.c:2936
 lock_sock include/net/sock.h:1526 [inline]
 inet_autobind+0x13/0x160 net/ipv4/af_inet.c:179
 inet_dgram_connect+0x1e8/0x280 net/ipv4/af_inet.c:569
 __sys_connect_file+0x139/0x1a0 net/socket.c:1844
 __sys_connect+0x104/0x140 net/socket.c:1861
 __do_sys_connect net/socket.c:1872 [inline]
 __se_sys_connect net/socket.c:1869 [inline]
 __x64_sys_connect+0x6e/0xb0 net/socket.c:1869
 do_syscall_64+0xd0/0x600 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x458da9
Code: ad b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f54389dec78 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458da9
RDX: 000000000000001c RSI: 0000000020000080 RDI: 0000000000000007
RBP: 000000000073bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f54389df6d4
R13: 00000000004bf1f1 R14: 00000000004d02c0 R15: 00000000ffffffff
Kernel Offset: disabled
Rebooting in 86400 seconds..