./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor4179680740 <...> forked to background, child pid 3183 no interfaces have a carrier [ 23.836788][ T3184] 8021q: adding VLAN 0 to HW filter on device bond0 [ 23.850028][ T3184] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.1.24' (ECDSA) to the list of known hosts. execve("./syz-executor4179680740", ["./syz-executor4179680740"], 0x7ffd2dc75a30 /* 10 vars */) = 0 brk(NULL) = 0x5555570de000 brk(0x5555570dec40) = 0x5555570dec40 arch_prctl(ARCH_SET_FS, 0x5555570de300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor4179680740", 4096) = 28 brk(0x5555570ffc40) = 0x5555570ffc40 brk(0x555557100000) = 0x555557100000 mprotect(0x7f66bb9d7000, 16384, PROT_READ) = 0 mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000 mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000 mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000 openat(AT_FDCWD, "/dev/char/2:21", O_RDWR) = 3 ioctl(3, TIOCSETD, [21]) = 0 syzkaller login: [ 40.861903][ T3604] INFO: trying to register non-static key. [ 40.867745][ T3604] The code is fine but needs lockdep annotation, or maybe [ 40.874824][ T3604] you didn't initialize this object before use? [ 40.881037][ T3604] turning off the locking correctness validator. [ 40.887336][ T3604] CPU: 0 PID: 3604 Comm: syz-executor417 Not tainted 6.0.0-rc2-syzkaller-00191-g3e5c673f0d75 #0 [ 40.897747][ T3604] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 [ 40.907967][ T3604] Call Trace: [ 40.911232][ T3604] [ 40.914145][ T3604] dump_stack_lvl+0xcd/0x134 [ 40.918833][ T3604] register_lock_class+0xf1b/0x1120 [ 40.924103][ T3604] ? is_dynamic_key.part.0+0x130/0x130 [ 40.929546][ T3604] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 40.935512][ T3604] ? __lock_acquire+0xbc3/0x56d0 [ 40.940433][ T3604] __lock_acquire+0x109/0x56d0 [ 40.945181][ T3604] ? find_held_lock+0x2d/0x110 [ 40.950011][ T3604] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 40.955975][ T3604] ? lock_downgrade+0x6e0/0x6e0 [ 40.960815][ T3604] lock_acquire+0x1ab/0x570 [ 40.965485][ T3604] ? gsmld_write+0x5e/0x140 [ 40.969986][ T3604] ? lock_release+0x780/0x780 [ 40.974653][ T3604] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 40.980633][ T3604] ? _copy_mc_to_iter+0x1430/0x1430 [ 40.986172][ T3604] ? _raw_spin_lock_irqsave+0x4e/0x50 [ 40.991717][ T3604] _raw_spin_lock_irqsave+0x39/0x50 [ 40.996912][ T3604] ? gsmld_write+0x5e/0x140 [ 41.001669][ T3604] gsmld_write+0x5e/0x140 [ 41.005993][ T3604] file_tty_write.constprop.0+0x499/0x8f0 [ 41.011708][ T3604] ? gsmtty_tiocmget+0xd0/0xd0 [ 41.016462][ T3604] vfs_write+0x9e9/0xdd0 [ 41.020702][ T3604] ? vfs_read+0x930/0x930 [ 41.025025][ T3604] ? find_held_lock+0x2d/0x110 [ 41.029779][ T3604] ? lock_downgrade+0x6e0/0x6e0 [ 41.034618][ T3604] ? __fget_light+0x20a/0x270 [ 41.039287][ T3604] ksys_write+0x127/0x250 [ 41.043609][ T3604] ? __ia32_sys_read+0xb0/0xb0 [ 41.048452][ T3604] ? lockdep_hardirqs_on+0x79/0x100 [ 41.053731][ T3604] ? _raw_spin_unlock_irq+0x2a/0x40 [ 41.059004][ T3604] ? ptrace_notify+0xfa/0x140 [ 41.063675][ T3604] do_syscall_64+0x35/0xb0 [ 41.068085][ T3604] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 41.073970][ T3604] RIP: 0033:0x7f66bb96b289 [ 41.078374][ T3604] Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 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 c0 ff ff ff f7 d8 64 89 01 48 [ 41.097989][ T3604] RSP: 002b:00007ffd6532e468 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 write(3, NULL, 0) = 0 exit_group(0) = ? +++ exited with 0 +++ [ 41.106397][ T3604] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007