[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.123' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 126.194035] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 126.202209] gfs2: fsid=syz:syz: Now mounting FS... [ 126.230071] gfs2: fsid=syz:syz.0: journal 0 mapped with 1 extents [ 126.236591] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 126.243706] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 126.254690] gfs2: fsid=syz:syz.0: jid=0: Done [ 126.260080] gfs2: fsid=syz:syz.0: first mount done, others may mount executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 156.658112] WARNING: CPU: 0 PID: 23 at include/linux/backing-dev.h:340 account_page_dirtied+0x8cc/0xbb0 [ 156.667953] Kernel panic - not syncing: panic_on_warn set ... [ 156.667953] [ 156.675352] CPU: 0 PID: 23 Comm: kworker/u4:1 Not tainted 4.19.211-syzkaller #0 [ 156.682807] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 156.692173] Workqueue: writeback wb_workfn (flush-7:0) [ 156.697468] Call Trace: [ 156.700044] dump_stack+0x1fc/0x2ef [ 156.703669] panic+0x26a/0x50e [ 156.706846] ? __warn_printk+0xf3/0xf3 [ 156.710720] ? account_page_dirtied+0x8cc/0xbb0 [ 156.715429] ? __probe_kernel_read+0x130/0x1b0 [ 156.720009] ? __warn.cold+0x5/0x5a [ 156.723619] ? __warn+0xe4/0x200 [ 156.727061] ? account_page_dirtied+0x8cc/0xbb0 [ 156.731712] __warn.cold+0x20/0x5a [ 156.735251] ? account_page_dirtied+0x8cc/0xbb0 [ 156.739918] report_bug+0x262/0x2b0 [ 156.743534] do_error_trap+0x1d7/0x310 [ 156.747422] ? math_error+0x310/0x310 [ 156.751210] ? mark_held_locks+0xf0/0xf0 [ 156.755260] ? error_entry+0x72/0xd0 [ 156.758968] ? trace_hardirqs_off_caller+0x2c/0x210 [ 156.763971] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 156.768800] invalid_op+0x14/0x20 [ 156.772240] RIP: 0010:account_page_dirtied+0x8cc/0xbb0 [ 156.777501] Code: 88 01 00 00 be ff ff ff ff 48 8d 78 70 e8 ec e1 ca ff 31 ff 89 c3 89 c6 e8 f1 b3 e2 ff 85 db 0f 85 39 f9 ff ff e8 74 b2 e2 ff <0f> 0b e9 2d f9 ff ff e8 68 b2 e2 ff 4c 89 e6 4c 89 ef e8 9d b3 2d [ 156.796474] RSP: 0018:ffff8880b5047598 EFLAGS: 00010093 [ 156.801833] RAX: ffff8880b503c600 RBX: 0000000000000000 RCX: ffffffff817fd2ef [ 156.809085] RDX: 0000000000000000 RSI: ffffffff817fd2fc RDI: 0000000000000005 [ 156.816337] RBP: ffff8880ae288a60 R08: 0000000000000001 R09: 0000000000000000 [ 156.823590] R10: 0000000000000005 R11: 0000000000000000 R12: ffffea000266e340 [ 156.830850] R13: ffff8880ae2888d8 R14: ffff8880b0784be0 R15: ffffea000266e348 [ 156.838114] ? account_page_dirtied+0x8bf/0xbb0 [ 156.842769] ? account_page_dirtied+0x8cc/0xbb0 [ 156.847427] ? account_page_dirtied+0x8cc/0xbb0 [ 156.852096] __set_page_dirty+0x7f/0x3e0 [ 156.856145] ? lock_page_memcg+0xa7/0x220 [ 156.860276] mark_buffer_dirty+0x424/0x5c0 [ 156.864496] gfs2_unpin+0xd6/0xe80 [ 156.868023] ? log_write_header+0x29b/0x1010 [ 156.872414] ? wait_woken+0x250/0x250 [ 156.876199] buf_lo_after_commit+0x140/0x210 [ 156.880590] ? gfs2_unpin+0xe80/0xe80 [ 156.884376] gfs2_log_flush+0x9fa/0x1ef0 [ 156.888424] ? mark_held_locks+0xf0/0xf0 [ 156.892472] ? gfs2_log_shutdown+0x3f0/0x3f0 [ 156.896866] ? reacquire_held_locks+0xb5/0x430 [ 156.901467] ? do_writepages+0x1f5/0x290 [ 156.905548] ? __writeback_single_inode+0x306/0x11d0 [ 156.910652] ? lock_downgrade+0x720/0x720 [ 156.914796] gfs2_write_inode+0x3f2/0x550 [ 156.918943] __writeback_single_inode+0x733/0x11d0 [ 156.923861] writeback_sb_inodes+0x537/0xef0 [ 156.928273] ? wbc_detach_inode+0x840/0x840 [ 156.932605] ? down_read_trylock+0x4e/0x90 [ 156.936826] ? trylock_super+0x1d/0x100 [ 156.940884] __writeback_inodes_wb+0xc6/0x280 [ 156.945365] wb_writeback+0x841/0xcc0 [ 156.949154] ? writeback_inodes_wb.constprop.0+0x1d0/0x1d0 [ 156.954764] ? cpumask_next+0x3c/0x40 [ 156.958550] ? get_nr_dirty_inodes+0x19e/0x210 [ 156.963119] wb_workfn+0x8ba/0x1250 [ 156.966734] ? inode_wait_for_writeback+0x30/0x30 [ 156.971568] process_one_work+0x864/0x1570 [ 156.975790] ? pwq_dec_nr_in_flight+0x2d0/0x2d0 [ 156.980465] worker_thread+0x64c/0x1130 [ 156.984430] ? process_one_work+0x1570/0x1570 [ 156.988927] kthread+0x33f/0x460 [ 156.992281] ? kthread_park+0x180/0x180 [ 156.996240] ret_from_fork+0x24/0x30 [ 157.000330] Kernel Offset: disabled [ 157.004015] Rebooting in 86400 seconds..