[ 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 '10.128.0.147' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 36.641344] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2020/09/19 18:44 (1000) [ 36.696327] ------------[ cut here ]------------ [ 36.701557] WARNING: CPU: 0 PID: 8092 at fs/udf/inode.c:1979 __udf_add_aext.cold+0x41/0x76 [ 36.709973] Kernel panic - not syncing: panic_on_warn set ... [ 36.709973] [ 36.717319] CPU: 0 PID: 8092 Comm: syz-executor915 Not tainted 4.19.211-syzkaller #0 [ 36.725182] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.734515] Call Trace: [ 36.737089] dump_stack+0x1fc/0x2ef [ 36.740701] panic+0x26a/0x50e [ 36.743874] ? __warn_printk+0xf3/0xf3 [ 36.747758] ? __udf_add_aext.cold+0x41/0x76 [ 36.752158] ? __probe_kernel_read+0x130/0x1b0 [ 36.756736] ? __warn.cold+0x5/0x5a [ 36.760345] ? __warn+0xe4/0x200 [ 36.763692] ? __udf_add_aext.cold+0x41/0x76 [ 36.768082] __warn.cold+0x20/0x5a [ 36.771615] ? __udf_add_aext.cold+0x41/0x76 [ 36.776005] report_bug+0x262/0x2b0 [ 36.779615] do_error_trap+0x1d7/0x310 [ 36.783484] ? math_error+0x310/0x310 [ 36.787282] ? __irq_work_queue_local+0x101/0x160 [ 36.792110] ? irq_work_queue+0x29/0x80 [ 36.796073] ? error_entry+0x72/0xd0 [ 36.799772] ? trace_hardirqs_off_caller+0x6e/0x210 [ 36.804773] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 36.809600] invalid_op+0x14/0x20 [ 36.813038] RIP: 0010:__udf_add_aext.cold+0x41/0x76 [ 36.818039] Code: fa e8 b9 b1 69 f9 48 c7 c7 80 85 9a 88 e8 18 e3 fa ff 0f 0b e9 a4 1b 76 fa e8 a1 b1 69 f9 48 c7 c7 80 85 9a 88 e8 00 e3 fa ff <0f> 0b 48 8b 54 24 10 b8 ff ff 37 00 48 c1 e0 2a 48 c1 ea 03 0f b6 [ 36.836931] RSP: 0018:ffff8880b2d2edb8 EFLAGS: 00010282 [ 36.842276] RAX: 0000000000000024 RBX: ffff8880b2d2f220 RCX: 0000000000000000 [ 36.849525] RDX: 0000000000000000 RSI: ffffffff814dff01 RDI: ffffed10165a5da9 [ 36.856777] RBP: ffff88808dfd7670 R08: 0000000000000024 R09: 0000000000000000 [ 36.864028] R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000000 [ 36.871278] R13: 00000000000001d0 R14: 0000000000000010 R15: 00000000000001e8 [ 36.878542] ? vprintk_func+0x81/0x180 [ 36.882417] ? __udf_add_aext.cold+0x41/0x76 [ 36.886820] ? udf_new_tag+0x2d1/0x380 [ 36.890690] udf_setup_indirect_aext+0x504/0x7e0 [ 36.895439] ? udf_current_aext+0x900/0x900 [ 36.899766] ? udf_new_block+0x232/0x490 [ 36.903810] udf_add_aext+0x210/0x2e0 [ 36.907592] ? udf_setup_indirect_aext+0x7e0/0x7e0 [ 36.912503] ? udf_next_aext+0x2a6/0x3a0 [ 36.916543] ? udf_write_aext+0x4ff/0x860 [ 36.920672] inode_getblk+0x1984/0x3b30 [ 36.924635] ? udf_delete_aext+0xac0/0xac0 [ 36.928852] ? __lock_acquire+0x6de/0x3ff0 [ 36.933074] ? release_pages+0xb0d/0x15a0 [ 36.937216] ? lock_downgrade+0x720/0x720 [ 36.941365] ? lock_acquire+0x170/0x3c0 [ 36.945324] ? udf_get_block+0x10a/0x650 [ 36.949369] udf_get_block+0x1e1/0x650 [ 36.953240] ? udf_block_map+0x290/0x290 [ 36.957284] ? create_empty_buffers+0x4e7/0x760 [ 36.961937] ? _raw_spin_unlock+0x29/0x40 [ 36.966065] ? create_page_buffers+0x190/0x350 [ 36.970629] __block_write_begin_int+0x46c/0x17b0 [ 36.975456] ? udf_block_map+0x290/0x290 [ 36.979505] ? __breadahead_gfp+0x130/0x130 [ 36.983810] ? balance_dirty_pages_ratelimited+0x684/0x1df0 [ 36.989500] ? wait_for_stable_page+0x122/0x360 [ 36.994153] ? udf_block_map+0x290/0x290 [ 36.998199] block_write_begin+0x58/0x2e0 [ 37.002333] udf_write_begin+0x39/0xa0 [ 37.006206] generic_perform_write+0x1f8/0x4d0 [ 37.010773] ? filemap_page_mkwrite+0x2f0/0x2f0 [ 37.015433] ? current_time+0x1c0/0x1c0 [ 37.019391] ? lock_downgrade+0x720/0x720 [ 37.023524] ? lock_acquire+0x170/0x3c0 [ 37.027477] __generic_file_write_iter+0x24b/0x610 [ 37.032405] udf_file_write_iter+0x2d4/0x4e0 [ 37.036793] ? iov_iter_init+0xb8/0x1d0 [ 37.040747] __vfs_write+0x51b/0x770 [ 37.044439] ? kernel_read+0x110/0x110 [ 37.048315] __kernel_write+0x109/0x370 [ 37.052271] write_pipe_buf+0x153/0x1f0 [ 37.056228] ? generic_file_read_iter+0xdcd/0x2b60 [ 37.061139] ? default_file_splice_read+0xa00/0xa00 [ 37.066139] ? splice_from_pipe_next.part.0+0x2ad/0x360 [ 37.071490] ? page_cache_pipe_buf_confirm+0x1e5/0x2a0 [ 37.076747] __splice_from_pipe+0x389/0x800 [ 37.081053] ? default_file_splice_read+0xa00/0xa00 [ 37.086055] default_file_splice_write+0xd8/0x180 [ 37.090879] ? generic_splice_sendpage+0x140/0x140 [ 37.095794] ? security_file_permission+0x1c0/0x220 [ 37.100794] ? generic_splice_sendpage+0x140/0x140 [ 37.105725] direct_splice_actor+0x115/0x160 [ 37.110120] splice_direct_to_actor+0x33f/0x8d0 [ 37.114771] ? generic_pipe_buf_nosteal+0x10/0x10 [ 37.119597] ? do_splice_to+0x160/0x160 [ 37.123557] do_splice_direct+0x1a7/0x270 [ 37.127686] ? splice_direct_to_actor+0x8d0/0x8d0 [ 37.132513] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 37.137512] do_sendfile+0x550/0xc30 [ 37.141211] ? do_compat_pwritev64+0x1b0/0x1b0 [ 37.145778] ? __might_fault+0x192/0x1d0 [ 37.149826] __se_sys_sendfile64+0xc4/0x160 [ 37.154135] ? __se_sys_sendfile+0x180/0x180 [ 37.158531] ? trace_hardirqs_off_caller+0x6e/0x210 [ 37.163532] ? do_syscall_64+0x21/0x620 [ 37.167488] do_syscall_64+0xf9/0x620 [ 37.171273] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 37.176444] RIP: 0033:0x7fa873994509 [ 37.180143] 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 [ 37.199028] RSP: 002b:00007ffc1839cc98 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 [ 37.206718] RAX: ffffffffffffffda RBX: 000000000000000b RCX: 00007fa873994509 [ 37.213970] RDX: 0000000020000240 RSI: 0000000000000004 RDI: 0000000000000004 [ 37.221221] RBP: 00007fa873953da0 R08: 0000000000000000 R09: 0000000000000000 [ 37.228471] R10: 0000000000007fff R11: 0000000000000246 R12: 00007fa873953e30 [ 37.235718] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 37.243281] Kernel Offset: disabled [ 37.246942] Rebooting in 86400 seconds..