bisecting fixing commit since f2bc9c908dfe3f56fe4ca4d92e5c5be80963b973 building syzkaller on 618456b4f4f74528ac6b9d709b1870d0e1d70eb2 testing commit f2bc9c908dfe3f56fe4ca4d92e5c5be80963b973 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: b06c8e4de3eb16a6d117b67d3b7d97d986160303d7b3c91b5c761428276518de 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 inet_autobind 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 inet_autobind 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 inet_autobind run #19: OK testing current HEAD 923dcc5eb0c111eccd51cc7ce1658537e3c38b25 testing commit 923dcc5eb0c111eccd51cc7ce1658537e3c38b25 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 58550e566cb69d2053a0c270b82f4ad2c50e3e0e75f60c3ac7039369310d5630 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: 28m42.24843531s (build: 10m29.71074068s, test: 17m16.048260344s) the crash still happens on HEAD commit msg: Merge branch 'akpm' (patches from Andrew) crash: WARNING: locking bug in selinux_netlbl_socket_connect ------------[ cut here ]------------ WARNING: CPU: 0 PID: 872 at kernel/locking/lockdep.c:909 look_up_lock_class+0x74/0xf0 kernel/locking/lockdep.c:909 Modules linked in: CPU: 0 PID: 872 Comm: syz-executor.3 Not tainted 5.16.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:look_up_lock_class+0x74/0xf0 kernel/locking/lockdep.c:909 Code: 85 c0 75 0a eb 66 48 8b 00 48 85 c0 74 5e 48 39 70 40 75 f2 48 8b 4f 18 48 39 88 b0 00 00 00 74 4d 48 81 3f e0 fe 49 8a 74 44 <0f> 0b eb 40 48 83 3d 50 46 a9 01 00 74 69 9c 58 0f 1f 44 00 00 f6 RSP: 0018:ffff88815d6b79b8 EFLAGS: 00010006 RAX: ffffffff8abff1a0 RBX: 1ffff1102bad6f42 RCX: ffffffff887b46e0 RDX: 0000000000000a42 RSI: ffffffff8b20ffc0 RDI: ffff8881762420a0 RBP: ffff88815d6b79c0 R08: 0000000000000001 R09: 0000000000000000 R10: fffffbfff14208ba R11: ffff8881759bf058 R12: 0000000000000000 R13: ffff8881762420a0 R14: ffffffff8af43380 R15: 0000000000000000 FS: 00007fe27d2e0700(0000) GS:ffff8881f6600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000178267005 CR4: 00000000003706f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: register_lock_class+0xeb/0x1340 kernel/locking/lockdep.c:1258 __lock_acquire+0xfc/0x53d0 kernel/locking/lockdep.c:4906 lock_acquire kernel/locking/lockdep.c:5637 [inline] lock_acquire+0x22a/0x5e0 kernel/locking/lockdep.c:5602 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x33/0x50 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:354 [inline] lock_sock_nested+0x54/0xe0 net/core/sock.c:3288 lock_sock include/net/sock.h:1645 [inline] selinux_netlbl_socket_connect+0x15/0x40 security/selinux/netlabel.c:610 selinux_socket_connect+0x4c/0x70 security/selinux/hooks.c:4953 security_socket_connect+0x50/0x90 security/security.c:2192 __sys_connect_file+0x96/0x1a0 net/socket.c:1892 __sys_connect+0x101/0x130 net/socket.c:1913 __do_sys_connect net/socket.c:1923 [inline] __se_sys_connect net/socket.c:1920 [inline] __x64_sys_connect+0x6e/0xb0 net/socket.c:1920 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xc0 arch/x86/entry/common.c:80 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:00007fe27d2e0198 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: 00007fe27d2e06bc irq event stamp: 150 hardirqs last enabled at (149): [] syscall_enter_from_user_mode+0x21/0x70 kernel/entry/common.c:107 hardirqs last disabled at (148): [] do_syscall_64+0x16/0xc0 arch/x86/entry/common.c:76 softirqs last enabled at (62): [] spin_unlock_bh include/linux/spinlock.h:394 [inline] softirqs last enabled at (62): [] vsock_insert_unbound net/vmw_vsock/af_vsock.c:266 [inline] softirqs last enabled at (62): [] vsock_create+0x225/0x3d0 net/vmw_vsock/af_vsock.c:2210 softirqs last disabled at (150): [] spin_lock_bh include/linux/spinlock.h:354 [inline] softirqs last disabled at (150): [] lock_sock_nested+0x54/0xe0 net/core/sock.c:3288 ---[ end trace 5d767b72f7dd4604 ]---