[ 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 '10.128.1.35' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 28.661009] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue [ 28.679982] audit: type=1800 audit(1660794501.188:2): pid=7976 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor571" name="file0" dev="loop0" ino=17 res=0 [ 28.681869] ------------[ cut here ]------------ [ 28.703069] kernel BUG at fs/ext4/inode.c:2847! [ 28.712376] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 28.717738] Modules linked in: [ 28.720912] CPU: 0 PID: 7976 Comm: syz-executor571 Not tainted 4.14.290-syzkaller #0 [ 28.728766] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 [ 28.738134] task: ffff888097bd8080 task.stack: ffff8880a8da0000 [ 28.744172] RIP: 0010:ext4_writepages+0x27fc/0x32a0 [ 28.749159] RSP: 0018:ffff8880a8da7638 EFLAGS: 00010297 [ 28.754498] RAX: ffff888097bd8080 RBX: 00000000a802c010 RCX: 1ffff11012f7b211 [ 28.761744] RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffff888097bd9088 [ 28.768989] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000001bd6 [ 28.776235] R10: 0000000000000001 R11: ffff888097bd8080 R12: 0000000000000001 [ 28.783483] R13: dffffc0000000000 R14: ffff88808df44870 R15: ffff8880a8da7a60 [ 28.790736] FS: 0000555555eb4300(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 [ 28.798937] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 28.804793] CR2: 0000555d70fd5120 CR3: 00000000956ac000 CR4: 00000000003406f0 [ 28.812042] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 28.819286] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 28.826528] Call Trace: [ 28.829104] ? trace_hardirqs_on+0x10/0x10 [ 28.833312] ? trace_hardirqs_on+0x10/0x10 [ 28.837521] ? __brelse+0x43/0x60 [ 28.840954] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 28.846491] ? ext4_mark_inode_dirty+0x7a0/0x7a0 [ 28.851227] ? mark_buffer_dirty+0x95/0x480 [ 28.855537] ? __ext4_handle_dirty_metadata+0x120/0x480 [ 28.860876] ? __lock_acquire+0x5fc/0x3f20 [ 28.865180] ? ext4_chunk_trans_blocks+0x30/0x30 [ 28.870001] ? trace_hardirqs_on+0x10/0x10 [ 28.874210] ? ext4_mark_inode_dirty+0x1db/0x7a0 [ 28.878939] ? ext4_expand_extra_isize+0x460/0x460 [ 28.883848] ? ext4_mark_inode_dirty+0x7a0/0x7a0 [ 28.888578] do_writepages+0xc3/0x240 [ 28.892372] ? page_writeback_cpu_online+0x10/0x10 [ 28.897276] ? lock_acquire+0x170/0x3f0 [ 28.901221] ? do_raw_spin_unlock+0x164/0x220 [ 28.905691] ? _raw_spin_unlock+0x29/0x40 [ 28.909814] ? wbc_attach_and_unlock_inode+0x5e8/0x8d0 [ 28.915081] __filemap_fdatawrite_range+0x236/0x310 [ 28.920076] ? replace_page_cache_page+0x700/0x700 [ 28.924983] file_write_and_wait_range+0x86/0xd0 [ 28.929724] __generic_file_fsync+0x70/0x190 [ 28.934132] ext4_sync_file+0x8ed/0x12c0 [ 28.938182] ? ext4_getfsmap+0x8c0/0x8c0 [ 28.942224] vfs_fsync_range+0x103/0x260 [ 28.946263] ext4_file_write_iter+0x5fa/0xd20 [ 28.950754] ? aa_file_perm+0x304/0xab0 [ 28.954704] ? debug_check_no_obj_freed+0x2c0/0x680 [ 28.959712] ? ext4_file_read_iter+0x330/0x330 [ 28.964272] ? trace_hardirqs_on+0x10/0x10 [ 28.968485] ? iov_iter_init+0xa6/0x1c0 [ 28.972435] __vfs_write+0x44c/0x630 [ 28.976149] ? kernel_read+0x110/0x110 [ 28.980014] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 28.985005] vfs_write+0x17f/0x4d0 [ 28.988520] SyS_write+0xf2/0x210 [ 28.991970] ? SyS_read+0x210/0x210 [ 28.995577] ? __close_fd+0x159/0x230 [ 28.999353] ? do_syscall_64+0x4c/0x640 [ 29.003301] ? SyS_read+0x210/0x210 [ 29.006904] do_syscall_64+0x1d5/0x640 [ 29.010773] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 29.015936] RIP: 0033:0x7f1e68175049 [ 29.019621] RSP: 002b:00007ffd1d6142a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 29.027304] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007f1e68175049 [ 29.034551] RDX: 0000000000000016 RSI: 0000000020000380 RDI: 0000000000000004 [ 29.041797] RBP: 00007f1e681348e0 R08: 0000000000000000 R09: 0000000000000000 [ 29.049043] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f1e68134970 [ 29.056287] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 29.063548] Code: ff ff 4c 89 ff e8 e5 c6 c3 ff e9 98 db ff ff e8 cb 10 9a ff 48 8b bc 24 b8 00 00 00 e8 4e 6d b1 ff e9 18 f5 ff ff e8 b4 10 9a ff <0f> 0b e8 ad 10 9a ff 48 8b bc 24 b8 00 00 00 e8 30 6d b1 ff 8b [ 29.082632] RIP: ext4_writepages+0x27fc/0x32a0 RSP: ffff8880a8da7638 [ 29.090066] ---[ end trace 69cd01fc146f3b6d ]--- [ 29.094822] Kernel panic - not syncing: Fatal exception [ 29.100332] Kernel Offset: disabled [ 29.103942] Rebooting in 86400 seconds..