[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.217' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 29.043763] IPVS: ftp: loaded support on port[0] = 21 [ 29.100963] NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds [ 29.124077] audit: type=1800 audit(1677765458.425:2): pid=7967 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor149" name="bus" dev="loop0" ino=18 res=0 [ 29.153323] ------------[ cut here ]------------ [ 29.158582] WARNING: CPU: 1 PID: 7994 at fs/nilfs2/sufile.c:551 nilfs_sufile_set_segment_usage+0x461/0x5f0 [ 29.168667] Kernel panic - not syncing: kernel: panic_on_warn set ... [ 29.168667] [ 29.176893] CPU: 1 PID: 7994 Comm: segctord Not tainted 4.14.307-syzkaller #0 [ 29.190020] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023 [ 29.199843] Call Trace: [ 29.202429] dump_stack+0x1b2/0x281 [ 29.206046] panic+0x21d/0x451 [ 29.209252] ? add_taint.cold+0x16/0x16 [ 29.213313] ? log_store.cold+0x16/0x16 [ 29.217302] ? nilfs_sufile_set_segment_usage+0x461/0x5f0 [ 29.222924] check_panic_on_warn.cold+0x19/0x35 [ 29.227586] __warn+0xdf/0x1e0 [ 29.230777] ? ist_end_non_atomic+0x10/0x10 [ 29.235190] ? nilfs_sufile_set_segment_usage+0x461/0x5f0 [ 29.240724] report_bug+0x208/0x250 [ 29.244342] do_error_trap+0x195/0x2d0 [ 29.248213] ? math_error+0x2d0/0x2d0 [ 29.251994] ? nilfs_mdt_submit_block.constprop.0+0x970/0x970 [ 29.257872] ? lock_downgrade+0x740/0x740 [ 29.262028] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 29.266854] invalid_op+0x1b/0x40 [ 29.270288] RIP: 0010:nilfs_sufile_set_segment_usage+0x461/0x5f0 [ 29.276437] RSP: 0018:ffff8880b3d57af8 EFLAGS: 00010297 [ 29.281807] RAX: ffff8880b363e4c0 RBX: ffff88808cf91200 RCX: ffff8880a893d000 [ 29.289166] RDX: 0000000000000000 RSI: 1ffff11014446f51 RDI: ffff8880a893d06c [ 29.296435] RBP: ffff8880a893d060 R08: ffff8880a2237a00 R09: 0000000000000000 [ 29.303867] R10: 0000000000000000 R11: ffff8880b363e4c0 R12: 0000000000000000 [ 29.311734] R13: 1ffff110167aaf64 R14: ffff88808cf915b0 R15: 000000006400ab52 [ 29.319180] ? nilfs_sufile_set_segment_usage+0x461/0x5f0 [ 29.324873] ? up_write+0x17/0x60 [ 29.328317] ? nilfs_write_inode_common+0x696/0x830 [ 29.333512] ? nilfs_sufile_mark_dirty+0x520/0x520 [ 29.338597] ? nilfs_segctor_fill_in_super_root+0x296/0x410 [ 29.344286] nilfs_segctor_do_construct+0x1c82/0x79c0 [ 29.349571] ? nilfs_segctor_scan_file+0x630/0x630 [ 29.354484] ? lock_acquire+0x170/0x3f0 [ 29.358560] ? lock_downgrade+0x740/0x740 [ 29.362683] ? do_raw_spin_unlock+0x164/0x220 [ 29.367244] ? _raw_spin_unlock+0x29/0x40 [ 29.372858] nilfs_segctor_construct+0x6db/0x8e0 [ 29.378451] nilfs_segctor_thread+0x3ad/0xdb0 [ 29.383025] ? nilfs_segctor_construct+0x8e0/0x8e0 [ 29.388072] ? __schedule+0x1450/0x1de0 [ 29.392121] ? wait_woken+0x230/0x230 [ 29.395903] ? nilfs_segctor_construct+0x8e0/0x8e0 [ 29.400824] kthread+0x30d/0x420 [ 29.404171] ? kthread_create_on_node+0xd0/0xd0 [ 29.408821] ret_from_fork+0x24/0x30 [ 29.413067] Kernel Offset: disabled [ 29.416833] Rebooting in 86400 seconds..