bisecting fixing commit since f2bc9c908dfe3f56fe4ca4d92e5c5be80963b973 building syzkaller on 618456b4f4f74528ac6b9d709b1870d0e1d70eb2 testing commit f2bc9c908dfe3f56fe4ca4d92e5c5be80963b973 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: b06c8e4de3eb16a6d117b67d3b7d97d986160303d7b3c91b5c761428276518de all runs: crashed: WARNING: locking bug in selinux_netlbl_socket_connect testing current HEAD 64222515138e43da1fcf288f0289ef1020427b87 testing commit 64222515138e43da1fcf288f0289ef1020427b87 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: ad1d4508d4bbf1dc65a3f4287c489b9a6b2caff3d1ff21aed193e15cd3b08b01 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: OK run #7: OK run #8: OK run #9: crashed: WARNING: locking bug in selinux_netlbl_socket_connect revisions tested: 2, total time: 28m50.333936027s (build: 11m4.142452528s, test: 16m41.60250828s) the crash still happens on HEAD commit msg: Merge tag 'drm-fixes-2021-10-22' of git://anongit.freedesktop.org/drm/drm crash: WARNING: locking bug in selinux_netlbl_socket_connect ------------[ cut here ]------------ WARNING: CPU: 1 PID: 30986 at kernel/locking/lockdep.c:897 look_up_lock_class+0x7e/0x100 kernel/locking/lockdep.c:897 Modules linked in: CPU: 1 PID: 30986 Comm: syz-executor.3 Not tainted 5.15.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:look_up_lock_class+0x7e/0x100 kernel/locking/lockdep.c:897 Code: c0 75 0a eb 5b 48 8b 00 48 85 c0 74 53 48 39 58 40 75 f2 49 8b 55 18 48 39 90 b0 00 00 00 74 42 49 81 7d 00 c0 1e 4a 8a 74 38 <0f> 0b eb 34 e8 79 40 f7 f9 f6 c4 02 74 be e8 df 74 d4 fb 85 c0 74 RSP: 0018:ffff88816f0d79a0 EFLAGS: 00010002 RAX: ffffffff8ac00b80 RBX: ffffffff8b211e20 RCX: 0000000000000000 RDX: ffffffff8879bc00 RSI: 0000000000000000 RDI: ffff888178b990a0 RBP: ffff88816f0d79c0 R08: 0000000000000001 R09: 0000000000000000 R10: ffffed103ece6761 R11: ffff888105a78ed8 R12: 0000000000000cf1 R13: ffff888178b990a0 R14: ffffffff8af45360 R15: 0000000000000000 FS: 00007fcde250f700(0000) GS:ffff8881f6700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000004 CR3: 000000017803d005 CR4: 00000000003706e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: register_lock_class+0xb2/0x1340 kernel/locking/lockdep.c:1246 __lock_acquire+0xfc/0x53d0 kernel/locking/lockdep.c:4894 lock_acquire kernel/locking/lockdep.c:5625 [inline] lock_acquire+0x22a/0x5e0 kernel/locking/lockdep.c:5590 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline] _raw_spin_lock_bh+0x33/0x50 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:368 [inline] lock_sock_nested+0x56/0xe0 net/core/sock.c:3206 lock_sock include/net/sock.h:1615 [inline] selinux_netlbl_socket_connect+0x15/0x40 security/selinux/netlabel.c:607 selinux_socket_connect+0x4c/0x70 security/selinux/hooks.c:4970 security_socket_connect+0x50/0x90 security/security.c:2191 __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:00007fcde250f198 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: 00007fcde250f6bc irq event stamp: 162 hardirqs last enabled at (161): [] syscall_enter_from_user_mode+0x21/0x70 kernel/entry/common.c:107 hardirqs last disabled at (160): [] do_syscall_64+0x16/0xc0 arch/x86/entry/common.c:76 softirqs last enabled at (72): [] spin_unlock_bh include/linux/spinlock.h:408 [inline] softirqs last enabled at (72): [] vsock_insert_unbound net/vmw_vsock/af_vsock.c:266 [inline] softirqs last enabled at (72): [] vsock_create+0x225/0x3d0 net/vmw_vsock/af_vsock.c:2212 softirqs last disabled at (162): [] spin_lock_bh include/linux/spinlock.h:368 [inline] softirqs last disabled at (162): [] lock_sock_nested+0x56/0xe0 net/core/sock.c:3206 ---[ end trace eab2137f99ed2b02 ]---