[ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Started OpenBSD Secure Shell server. [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.67' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 34.143252] NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds [ 34.158592] ------------[ cut here ]------------ [ 34.163743] WARNING: CPU: 0 PID: 8122 at fs/nilfs2/dat.c:186 nilfs_dat_commit_end.cold+0x11/0x18 [ 34.172677] Kernel panic - not syncing: panic_on_warn set ... [ 34.172677] [ 34.180058] CPU: 0 PID: 8122 Comm: syz-executor378 Not tainted 4.19.211-syzkaller #0 [ 34.187982] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 [ 34.197323] Call Trace: [ 34.199904] dump_stack+0x1fc/0x2ef [ 34.203519] panic+0x26a/0x50e [ 34.206698] ? __warn_printk+0xf3/0xf3 [ 34.210572] ? nilfs_dat_commit_end.cold+0x11/0x18 [ 34.215486] ? __probe_kernel_read+0x130/0x1b0 [ 34.220071] ? __warn.cold+0x5/0x5a [ 34.223697] ? __warn+0xe4/0x200 [ 34.227049] ? nilfs_dat_commit_end.cold+0x11/0x18 [ 34.231978] __warn.cold+0x20/0x5a [ 34.235534] ? nilfs_dat_commit_end.cold+0x11/0x18 [ 34.240459] report_bug+0x262/0x2b0 [ 34.244077] do_error_trap+0x1d7/0x310 [ 34.247946] ? math_error+0x310/0x310 [ 34.251728] ? __irq_work_queue_local+0x101/0x160 [ 34.256547] ? irq_work_queue+0x29/0x80 [ 34.260501] ? error_entry+0x72/0xd0 [ 34.264230] ? trace_hardirqs_off_caller+0x6e/0x210 [ 34.269258] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.274115] invalid_op+0x14/0x20 [ 34.277588] RIP: 0010:nilfs_dat_commit_end.cold+0x11/0x18 [ 34.283113] Code: fa e8 98 4f 69 f9 48 c7 c7 80 df 9e 88 e8 f7 80 fa ff 0f 0b e9 1a 66 b6 fa e8 80 4f 69 f9 48 c7 c7 80 df 9e 88 e8 df 80 fa ff <0f> 0b e9 0e 69 b6 fa e8 68 4f 69 f9 48 c7 c7 80 df 9e 88 e8 c7 80 [ 34.302001] RSP: 0018:ffff88808f79f950 EFLAGS: 00010286 [ 34.307350] RAX: 0000000000000024 RBX: ffff8880b5311820 RCX: 0000000000000000 [ 34.314603] RDX: 0000000000000000 RSI: ffffffff814dff01 RDI: ffffed1011ef3f1c [ 34.321859] RBP: ffff88808f79f9c0 R08: 0000000000000024 R09: 0000000000000000 [ 34.329109] R10: 0000000000000005 R11: 0000000000000000 R12: ffff88808dbec9c0 [ 34.336362] R13: ffffffff00000000 R14: ffff88808f79f9d8 R15: 0000000000000003 [ 34.343633] ? vprintk_func+0x81/0x180 [ 34.347514] nilfs_direct_delete+0x26c/0x2d0 [ 34.351905] ? nilfs_direct_gather_data+0x160/0x160 [ 34.356908] ? truncate_inode_pages_range+0x749/0x1b00 [ 34.362176] nilfs_bmap_do_delete+0x225/0x2e0 [ 34.366657] ? nilfs_btnode_abort_change_key+0x150/0x150 [ 34.372094] ? truncate_inode_page+0xc0/0xc0 [ 34.376488] ? lock_acquire+0x170/0x3c0 [ 34.380448] ? nilfs_bmap_truncate+0x7d/0x300 [ 34.384928] nilfs_bmap_truncate+0x109/0x300 [ 34.389324] ? nilfs_bmap_delete+0x100/0x100 [ 34.393754] nilfs_truncate_bmap+0x13d/0x350 [ 34.398165] ? nilfs_writepage+0x280/0x280 [ 34.402396] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 34.407400] ? nilfs_transaction_begin+0x2a8/0xa50 [ 34.412314] nilfs_evict_inode+0x14d/0x440 [ 34.416554] ? nilfs_get_block+0x970/0x970 [ 34.420951] ? nilfs_get_block+0x970/0x970 [ 34.425177] evict+0x2ed/0x760 [ 34.428356] iput+0x4f1/0x860 [ 34.431578] do_unlinkat+0x40b/0x660 [ 34.435278] ? __ia32_sys_rmdir+0x40/0x40 [ 34.439412] ? strncpy_from_user+0x2a2/0x350 [ 34.443915] ? getname_flags+0x25b/0x590 [ 34.447978] do_syscall_64+0xf9/0x620 [ 34.451943] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 34.457299] RIP: 0033:0x7f2ae1983229 [ 34.461007] 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 c0 ff ff ff f7 d8 64 89 01 48 [ 34.480114] RSP: 002b:00007ffeb7287958 EFLAGS: 00000246 ORIG_RAX: 0000000000000057 [ 34.487925] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007f2ae1983229 [ 34.495477] RDX: 00007f2ae1983229 RSI: 00007f2ae19417c3 RDI: 0000000020000080 [ 34.503116] RBP: 00007f2ae1942a90 R08: 0000000000000000 R09: 0000000000000000 [ 34.510386] R10: 0000555556a662c0 R11: 0000000000000246 R12: 00007f2ae1942b20 [ 34.517664] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 34.525160] Kernel Offset: disabled [ 34.528949] Rebooting in 86400 seconds..