[ 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 '10.128.0.84' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 33.712314] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2020/09/19 18:44 (1000) [ 33.740475] ------------[ cut here ]------------ [ 33.745605] WARNING: CPU: 0 PID: 8115 at fs/udf/truncate.c:226 udf_truncate_extents.cold+0x11/0x18 [ 33.754706] Kernel panic - not syncing: panic_on_warn set ... [ 33.754706] [ 33.762053] CPU: 0 PID: 8115 Comm: syz-executor353 Not tainted 4.19.211-syzkaller #0 [ 33.769923] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022 [ 33.779253] Call Trace: [ 33.781829] dump_stack+0x1fc/0x2ef [ 33.785445] panic+0x26a/0x50e [ 33.788634] ? __warn_printk+0xf3/0xf3 [ 33.792506] ? udf_truncate_extents.cold+0x11/0x18 [ 33.797418] ? __probe_kernel_read+0x130/0x1b0 [ 33.801979] ? __warn.cold+0x5/0x5a [ 33.805599] ? __warn+0xe4/0x200 [ 33.808945] ? udf_truncate_extents.cold+0x11/0x18 [ 33.813869] __warn.cold+0x20/0x5a [ 33.817393] ? udf_truncate_extents.cold+0x11/0x18 [ 33.822303] report_bug+0x262/0x2b0 [ 33.825913] do_error_trap+0x1d7/0x310 [ 33.829796] ? math_error+0x310/0x310 [ 33.833577] ? __irq_work_queue_local+0x101/0x160 [ 33.838399] ? irq_work_queue+0x29/0x80 [ 33.842356] ? error_entry+0x72/0xd0 [ 33.846053] ? trace_hardirqs_off_caller+0x6e/0x210 [ 33.851050] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.855873] invalid_op+0x14/0x20 [ 33.859308] RIP: 0010:udf_truncate_extents.cold+0x11/0x18 [ 33.864820] Code: 89 df 48 c7 c6 40 a9 9a 88 e8 ac f9 ff ff 41 bc ea ff ff ff e9 96 57 78 fa e8 b0 a9 69 f9 48 c7 c7 60 b4 9a 88 e8 0f db fa ff <0f> 0b e9 81 78 78 fa e8 98 a9 69 f9 48 c7 c6 40 ba 9a 88 48 c7 c7 [ 33.883700] RSP: 0018:ffff8880b2fb7948 EFLAGS: 00010286 [ 33.889041] RAX: 0000000000000024 RBX: ffff88808b009670 RCX: 0000000000000000 [ 33.896305] RDX: 0000000000000000 RSI: ffffffff814dff01 RDI: ffffed10165f6f1b [ 33.903555] RBP: ffff8880b2fb7a30 R08: 0000000000000024 R09: 0000000000000000 [ 33.910819] R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880b2fb79f0 [ 33.918079] R13: 0000000000000150 R14: 00000000000000ff R15: ffff8880b0c00900 [ 33.925337] ? vprintk_func+0x81/0x180 [ 33.929219] ? udf_truncate_extents.cold+0x11/0x18 [ 33.934129] ? lock_downgrade+0x720/0x720 [ 33.938258] ? udf_discard_prealloc+0x690/0x690 [ 33.942927] ? udf_write_failed.isra.0+0x173/0x1d0 [ 33.947839] ? udf_write_failed.isra.0+0xd4/0x1d0 [ 33.952666] udf_write_failed.isra.0+0x17b/0x1d0 [ 33.957411] udf_write_begin+0x89/0xa0 [ 33.961277] ? current_time+0x13c/0x1c0 [ 33.965235] generic_perform_write+0x1f8/0x4d0 [ 33.969802] ? filemap_page_mkwrite+0x2f0/0x2f0 [ 33.974449] ? current_time+0x1c0/0x1c0 [ 33.978420] __generic_file_write_iter+0x24b/0x610 [ 33.983329] udf_file_write_iter+0x2d4/0x4e0 [ 33.987720] __vfs_write+0x51b/0x770 [ 33.991431] ? common_file_perm+0x4e5/0x850 [ 33.995733] ? kernel_read+0x110/0x110 [ 33.999607] ? check_preemption_disabled+0x41/0x280 [ 34.004605] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 34.009602] vfs_write+0x1f3/0x540 [ 34.013124] ksys_write+0x12b/0x2a0 [ 34.016729] ? __ia32_sys_read+0xb0/0xb0 [ 34.020772] ? trace_hardirqs_off_caller+0x6e/0x210 [ 34.026058] ? do_syscall_64+0x21/0x620 [ 34.030012] do_syscall_64+0xf9/0x620 [ 34.033796] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 34.038967] RIP: 0033:0x7fd50aaf5419 [ 34.042662] 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 [ 34.061545] RSP: 002b:00007ffc0e17e5d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 34.069242] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fd50aaf5419 [ 34.076505] RDX: 000000000000000e RSI: 0000000020000480 RDI: 0000000000000003 [ 34.083755] RBP: 00007fd50aab4cb0 R08: 0000000000000000 R09: 0000000000000000 [ 34.091005] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd50aab4d40 [ 34.098252] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 34.105698] Kernel Offset: disabled [ 34.109353] Rebooting in 86400 seconds..