INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.32' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 33.566670] EXT4-fs (sda1): shut down requested (0) [ 33.823987] ------------[ cut here ]------------ [ 33.828783] DEBUG_LOCKS_WARN_ON(sem->owner != get_current()) [ 33.828823] WARNING: CPU: 1 PID: 4441 at kernel/locking/rwsem.c:133 up_write+0x1cc/0x210 [ 33.842783] Kernel panic - not syncing: panic_on_warn set ... [ 33.842783] [ 33.850121] CPU: 1 PID: 4441 Comm: syzkaller594909 Not tainted 4.16.0+ #11 [ 33.857099] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.866423] Call Trace: [ 33.868987] dump_stack+0x1a7/0x27d [ 33.872584] ? arch_local_irq_restore+0x53/0x53 [ 33.877222] ? vsnprintf+0x1ed/0x1900 [ 33.880991] panic+0x1f8/0x42c [ 33.884153] ? refcount_error_report+0x214/0x214 [ 33.888876] ? show_regs_print_info+0x18/0x18 [ 33.893342] ? __warn+0x1c1/0x200 [ 33.896763] ? up_write+0x1cc/0x210 [ 33.900359] __warn+0x1dc/0x200 [ 33.903608] ? up_write+0x1cc/0x210 [ 33.907208] report_bug+0x1f4/0x2b0 [ 33.910809] fixup_bug.part.10+0x37/0x80 [ 33.914840] do_error_trap+0x2d7/0x3e0 [ 33.918696] ? vprintk_default+0x28/0x30 [ 33.922727] ? math_error+0x400/0x400 [ 33.926494] ? printk+0xaa/0xca [ 33.929740] ? show_regs_print_info+0x18/0x18 [ 33.934209] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.939026] do_invalid_op+0x1b/0x20 [ 33.943751] invalid_op+0x1b/0x40 [ 33.947174] RIP: 0010:up_write+0x1cc/0x210 [ 33.951376] RSP: 0018:ffff8801b349f710 EFLAGS: 00010286 [ 33.956709] RAX: dffffc0000000008 RBX: ffff8801ccc0ce40 RCX: ffffffff815ae26e [ 33.963947] RDX: 0000000000000000 RSI: 1ffff10036693e92 RDI: 1ffff10036693e67 [ 33.971188] RBP: ffff8801b349f798 R08: fffffbfff10b0659 R09: fffffbfff10b0659 [ 33.978433] R10: ffff8801b349f708 R11: fffffbfff10b0658 R12: 1ffff10036693ee2 [ 33.985681] R13: dffffc0000000000 R14: ffff8801b349f770 R15: ffff8801ccc0ce98 [ 33.992942] ? vprintk_func+0x5e/0xc0 [ 33.996718] ? up_read+0x110/0x110 [ 34.000227] ? lock_release+0xa40/0xa40 [ 34.004172] ? thaw_super+0xfb/0x260 [ 34.007858] percpu_up_write+0xca/0x110 [ 34.011802] ? __percpu_up_read+0x50/0x50 [ 34.015920] thaw_super+0x1ca/0x260 [ 34.019525] thaw_bdev+0x151/0x180 [ 34.023039] ext4_ioctl+0x1f85/0x3e60 [ 34.026808] ? rcu_report_exp_cpu_mult+0x480/0x480 [ 34.031706] ? rcu_report_exp_cpu_mult+0x480/0x480 [ 34.036603] ? ext4_ioctl_group_add+0x510/0x510 [ 34.041242] ? is_bpf_text_address+0xa4/0x120 [ 34.045710] ? kernel_text_address+0xd1/0xe0 [ 34.050086] ? __unwind_start+0x169/0x330 [ 34.054200] ? __kernel_text_address+0xd/0x40 [ 34.058663] ? unwind_get_return_address+0x61/0xa0 [ 34.063561] ? __save_stack_trace+0x7e/0xd0 [ 34.067856] ? save_stack+0xa3/0xd0 [ 34.071449] ? save_stack+0x43/0xd0 [ 34.075047] ? __kasan_slab_free+0x11a/0x170 [ 34.079423] ? kasan_slab_free+0xe/0x10 [ 34.083367] ? kmem_cache_free+0x83/0x2a0 [ 34.087481] ? putname+0xee/0x130 [ 34.090911] ? do_sys_open+0x31b/0x6d0 [ 34.094782] ? SyS_open+0x2d/0x40 [ 34.098215] ? do_syscall_64+0x281/0x940 [ 34.102248] ? entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 34.107585] ? lock_release+0xa40/0xa40 [ 34.111529] ? kasan_check_read+0x11/0x20 [ 34.115643] ? do_raw_spin_unlock+0x9e/0x310 [ 34.120020] ? do_raw_spin_trylock+0x1a0/0x1a0 [ 34.124571] ? kasan_check_write+0x14/0x20 [ 34.128773] ? do_raw_spin_lock+0xc1/0x230 [ 34.132975] ? trace_hardirqs_off+0xd/0x10 [ 34.137176] ? _raw_spin_unlock_irqrestore+0xa6/0xc0 [ 34.142255] ? debug_check_no_obj_freed+0x2f8/0x633 [ 34.147243] ? kasan_check_read+0x11/0x20 [ 34.151365] ? ext4_ioctl_group_add+0x510/0x510 [ 34.156003] do_vfs_ioctl+0x1b1/0x1520 [ 34.159858] ? ioctl_preallocate+0x2b0/0x2b0 [ 34.164235] ? fget_raw+0x20/0x20 [ 34.167657] ? kmem_cache_free+0x258/0x2a0 [ 34.171858] ? putname+0xf3/0x130 [ 34.175285] ? do_sys_open+0x320/0x6d0 [ 34.179140] ? filp_open+0x70/0x70 [ 34.182647] ? mm_fault_error+0x2c0/0x2c0 [ 34.186766] ? security_file_ioctl+0x89/0xb0 [ 34.191145] SyS_ioctl+0x8f/0xc0 [ 34.194481] ? do_vfs_ioctl+0x1520/0x1520 [ 34.198596] do_syscall_64+0x281/0x940 [ 34.202454] ? vmalloc_sync_all+0x30/0x30 [ 34.206569] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 34.211296] ? syscall_return_slowpath+0x550/0x550 [ 34.216192] ? syscall_return_slowpath+0x2ac/0x550 [ 34.221090] ? prepare_exit_to_usermode+0x350/0x350 [ 34.226076] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 34.231408] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.236220] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 34.241377] RIP: 0033:0x440109 [ 34.244535] RSP: 002b:00007fffce185d28 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 34.252211] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440109 [ 34.259450] RDX: 0000000020000100 RSI: 000000008004587d RDI: 0000000000000003 [ 34.266693] RBP: 00000000006ca018 R08: 000000000000000f R09: 65732f636f72702f [ 34.273933] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401990 [ 34.281171] R13: 0000000000401a20 R14: 0000000000000000 R15: 0000000000000000 [ 34.288892] Dumping ftrace buffer: [ 34.292403] (ftrace buffer empty) [ 34.296086] Kernel Offset: disabled [ 34.299691] Rebooting in 86400 seconds..