bisecting fixing commit since f2bc9c908dfe3f56fe4ca4d92e5c5be80963b973 building syzkaller on 618456b4f4f74528ac6b9d709b1870d0e1d70eb2 testing commit f2bc9c908dfe3f56fe4ca4d92e5c5be80963b973 with gcc (GCC) 8.4.1 20210217 kernel signature: 75336dfe0a3d0704ef19075593948248341b554e38a4e87f39de6f115b02a8ac run #0: crashed: WARNING: locking bug in selinux_netlbl_socket_connect run #1: crashed: WARNING: locking bug in selinux_netlbl_socket_connect run #2: crashed: WARNING: locking bug in selinux_netlbl_socket_connect run #3: crashed: WARNING: locking bug in selinux_netlbl_socket_connect run #4: crashed: WARNING: locking bug in selinux_netlbl_socket_connect run #5: crashed: WARNING: locking bug in ip6_datagram_connect run #6: crashed: WARNING: locking bug in selinux_netlbl_socket_connect run #7: crashed: WARNING: locking bug in selinux_netlbl_socket_connect run #8: crashed: WARNING: locking bug in selinux_netlbl_socket_connect run #9: crashed: WARNING: locking bug in selinux_netlbl_socket_connect run #10: crashed: WARNING: locking bug in selinux_netlbl_socket_connect run #11: crashed: WARNING: locking bug in selinux_netlbl_socket_connect run #12: crashed: WARNING: locking bug in selinux_netlbl_socket_connect run #13: crashed: WARNING: locking bug in selinux_netlbl_socket_connect run #14: crashed: WARNING: locking bug in selinux_netlbl_socket_connect run #15: crashed: WARNING: locking bug in selinux_netlbl_socket_connect run #16: crashed: WARNING: locking bug in selinux_netlbl_socket_connect run #17: crashed: WARNING: locking bug in selinux_netlbl_socket_connect run #18: crashed: WARNING: locking bug in selinux_netlbl_socket_connect run #19: crashed: WARNING: locking bug in selinux_netlbl_socket_connect testing current HEAD 89698becf06d341a700913c3d89ce2a914af69a2 testing commit 89698becf06d341a700913c3d89ce2a914af69a2 with gcc (GCC) 10.2.1 20210217 kernel signature: 3c70ea91f216cc08051b09ea7e2f90bbc9ae4fde58bd4eb693d4ffd23c90628f run #0: crashed: WARNING: locking bug in selinux_netlbl_socket_connect run #1: crashed: WARNING: locking bug in selinux_netlbl_socket_connect run #2: crashed: WARNING: locking bug in selinux_netlbl_socket_connect run #3: crashed: WARNING: locking bug in selinux_netlbl_socket_connect run #4: crashed: WARNING: locking bug in selinux_netlbl_socket_connect run #5: crashed: WARNING: locking bug in selinux_netlbl_socket_connect run #6: crashed: WARNING: locking bug in selinux_netlbl_socket_connect run #7: crashed: WARNING: locking bug in selinux_netlbl_socket_connect run #8: OK run #9: OK revisions tested: 2, total time: 27m47.646000373s (build: 11m32.503400852s, test: 15m3.486936471s) the crash still happens on HEAD commit msg: Merge tag 'm68knommu-for-v5.12-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu crash: WARNING: locking bug in selinux_netlbl_socket_connect ------------[ cut here ]------------ WARNING: CPU: 0 PID: 27674 at kernel/locking/lockdep.c:894 look_up_lock_class kernel/locking/lockdep.c:894 [inline] WARNING: CPU: 0 PID: 27674 at kernel/locking/lockdep.c:894 register_lock_class+0x206/0x1920 kernel/locking/lockdep.c:1243 Modules linked in: CPU: 0 PID: 27674 Comm: syz-executor.2 Not tainted 5.12.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:look_up_lock_class kernel/locking/lockdep.c:894 [inline] RIP: 0010:register_lock_class+0x206/0x1920 kernel/locking/lockdep.c:1243 Code: 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 1a 10 00 00 4d 3b 68 18 74 0b 49 81 38 40 6e ff 89 74 02 <0f> 0b 45 85 c9 0f 84 b3 00 00 00 f6 85 70 ff ff ff 01 0f 85 a6 00 RSP: 0018:ffff8881018479c0 EFLAGS: 00010002 RAX: dffffc0000000000 RBX: 1ffff11020308f41 RCX: ffffffff8aa9a1e0 RDX: 1ffff110241c1a17 RSI: 0000000000000000 RDI: ffff888120e0d0b8 RBP: ffff888101847a90 R08: ffff888120e0d0a0 R09: 0000000000000000 R10: 0000000000000000 R11: ffff88810dd9f018 R12: ffffffff8a755380 R13: ffffffff882271c0 R14: ffff888101847a68 R15: ffffffff8ade79c0 FS: 00007fbfc60a0700(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000004 CR3: 0000000115186001 CR4: 00000000001706f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __lock_acquire+0xff/0x53d0 kernel/locking/lockdep.c:4780 lock_acquire kernel/locking/lockdep.c:5511 [inline] lock_acquire+0x22a/0x8c0 kernel/locking/lockdep.c:5476 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline] _raw_spin_lock_bh+0x33/0x50 kernel/locking/spinlock.c:175 spin_lock_bh include/linux/spinlock.h:359 [inline] lock_sock_nested+0x3f/0x100 net/core/sock.c:3057 lock_sock include/net/sock.h:1604 [inline] selinux_netlbl_socket_connect+0x15/0x40 security/selinux/netlabel.c:607 selinux_socket_connect+0x4c/0x70 security/selinux/hooks.c:4900 security_socket_connect+0x50/0x90 security/security.c:2139 __sys_connect_file+0x96/0x1a0 net/socket.c:1833 __sys_connect+0x101/0x130 net/socket.c:1854 __do_sys_connect net/socket.c:1864 [inline] __se_sys_connect net/socket.c:1861 [inline] __x64_sys_connect+0x6e/0xb0 net/socket.c:1861 do_syscall_64+0x38/0x90 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4605f9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fbfc60a0198 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: ffffffffffffffda RBX: 000000000052bfa0 RCX: 00000000004605f9 RDX: 000000000000001c RSI: 0000000020000080 RDI: 0000000000000007 RBP: 00000000004a9a99 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000003 R14: 00000000004aa986 R15: 00007fbfc60a06bc irq event stamp: 188 hardirqs last enabled at (187): [] syscall_enter_from_user_mode+0x21/0x70 kernel/entry/common.c:106 hardirqs last disabled at (186): [] do_syscall_64+0x14/0x90 arch/x86/entry/common.c:41 softirqs last enabled at (72): [] spin_unlock_bh include/linux/spinlock.h:399 [inline] softirqs last enabled at (72): [] vsock_insert_unbound net/vmw_vsock/af_vsock.c:266 [inline] softirqs last enabled at (72): [] vsock_create net/vmw_vsock/af_vsock.c:2066 [inline] softirqs last enabled at (72): [] vsock_create+0x20f/0x370 net/vmw_vsock/af_vsock.c:2026 softirqs last disabled at (188): [] spin_lock_bh include/linux/spinlock.h:359 [inline] softirqs last disabled at (188): [] lock_sock_nested+0x3f/0x100 net/core/sock.c:3057 ---[ end trace bcf2faa84e880ec1 ]---