[ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.7' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 33.110550] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2020/09/19 18:44 (1000) [ 33.176679] ------------[ cut here ]------------ [ 33.181657] WARNING: CPU: 0 PID: 8103 at fs/udf/inode.c:1979 __udf_add_aext.cold+0x41/0x76 [ 33.190041] Kernel panic - not syncing: panic_on_warn set ... [ 33.190041] [ 33.197393] CPU: 0 PID: 8103 Comm: syz-executor761 Not tainted 4.19.211-syzkaller #0 [ 33.205254] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.214585] Call Trace: [ 33.217161] dump_stack+0x1fc/0x2ef [ 33.220774] panic+0x26a/0x50e [ 33.223948] ? __warn_printk+0xf3/0xf3 [ 33.227817] ? __udf_add_aext.cold+0x41/0x76 [ 33.232638] ? __probe_kernel_read+0x130/0x1b0 [ 33.237200] ? __warn.cold+0x5/0x5a [ 33.240819] ? __warn+0xe4/0x200 [ 33.244169] ? __udf_add_aext.cold+0x41/0x76 [ 33.248563] __warn.cold+0x20/0x5a [ 33.252082] ? __udf_add_aext.cold+0x41/0x76 [ 33.256494] report_bug+0x262/0x2b0 [ 33.260120] do_error_trap+0x1d7/0x310 [ 33.263996] ? math_error+0x310/0x310 [ 33.267783] ? __irq_work_queue_local+0x101/0x160 [ 33.272619] ? irq_work_queue+0x29/0x80 [ 33.276638] ? error_entry+0x72/0xd0 [ 33.280478] ? trace_hardirqs_off_caller+0x6e/0x210 [ 33.285505] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.290348] invalid_op+0x14/0x20 [ 33.293796] RIP: 0010:__udf_add_aext.cold+0x41/0x76 [ 33.298794] 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 [ 33.318127] RSP: 0018:ffff8880b2c1edb8 EFLAGS: 00010282 [ 33.323476] RAX: 0000000000000024 RBX: ffff8880b2c1f220 RCX: 0000000000000000 [ 33.330860] RDX: 0000000000000000 RSI: ffffffff814dff01 RDI: ffffed1016583da9 [ 33.338205] RBP: ffff88808dbe5670 R08: 0000000000000024 R09: 0000000000000000 [ 33.345467] R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000000 [ 33.352728] R13: 00000000000001d0 R14: 0000000000000010 R15: 00000000000001e8 [ 33.360447] ? vprintk_func+0x81/0x180 [ 33.364326] ? __udf_add_aext.cold+0x41/0x76 [ 33.368724] ? udf_new_tag+0x2d1/0x380 [ 33.372595] udf_setup_indirect_aext+0x504/0x7e0 [ 33.377340] ? udf_current_aext+0x900/0x900 [ 33.381678] ? udf_new_block+0x232/0x490 [ 33.385743] udf_add_aext+0x210/0x2e0 [ 33.389530] ? udf_setup_indirect_aext+0x7e0/0x7e0 [ 33.394439] ? udf_next_aext+0x2a6/0x3a0 [ 33.398479] ? udf_write_aext+0x4ff/0x860 [ 33.402611] inode_getblk+0x1984/0x3b30 [ 33.406576] ? udf_delete_aext+0xac0/0xac0 [ 33.410793] ? __lock_acquire+0x6de/0x3ff0 [ 33.415019] ? __lock_acquire+0x6de/0x3ff0 [ 33.419241] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 33.424239] ? lock_downgrade+0x720/0x720 [ 33.428366] ? lock_acquire+0x170/0x3c0 [ 33.432317] ? udf_get_block+0x10a/0x650 [ 33.436362] udf_get_block+0x1e1/0x650 [ 33.440228] ? udf_block_map+0x290/0x290 [ 33.444269] ? lock_downgrade+0x720/0x720 [ 33.448397] ? check_preemption_disabled+0x41/0x280 [ 33.453404] ? create_page_buffers+0x190/0x350 [ 33.457978] __block_write_begin_int+0x46c/0x17b0 [ 33.462800] ? udf_block_map+0x290/0x290 [ 33.466846] ? __breadahead_gfp+0x130/0x130 [ 33.471152] ? wait_for_stable_page+0x122/0x360 [ 33.475801] ? udf_block_map+0x290/0x290 [ 33.479842] block_write_begin+0x58/0x2e0 [ 33.484147] udf_write_begin+0x39/0xa0 [ 33.488012] ? current_time+0x13c/0x1c0 [ 33.491968] generic_perform_write+0x1f8/0x4d0 [ 33.496535] ? filemap_page_mkwrite+0x2f0/0x2f0 [ 33.501186] ? current_time+0x1c0/0x1c0 [ 33.505143] ? lock_downgrade+0x720/0x720 [ 33.509271] ? lock_acquire+0x170/0x3c0 [ 33.513226] __generic_file_write_iter+0x24b/0x610 [ 33.518140] udf_file_write_iter+0x2d4/0x4e0 [ 33.522546] ? iov_iter_init+0xb8/0x1d0 [ 33.526519] __vfs_write+0x51b/0x770 [ 33.530226] ? kernel_read+0x110/0x110 [ 33.534111] ? lock_downgrade+0x720/0x720 [ 33.538245] ? check_preemption_disabled+0x41/0x280 [ 33.543248] __kernel_write+0x109/0x370 [ 33.547205] write_pipe_buf+0x153/0x1f0 [ 33.551157] ? generic_file_read_iter+0xdcd/0x2b60 [ 33.556065] ? default_file_splice_read+0xa00/0xa00 [ 33.561061] ? splice_from_pipe_next.part.0+0x2ad/0x360 [ 33.566404] ? page_cache_pipe_buf_confirm+0x1e5/0x2a0 [ 33.571661] __splice_from_pipe+0x389/0x800 [ 33.575971] ? default_file_splice_read+0xa00/0xa00 [ 33.580969] default_file_splice_write+0xd8/0x180 [ 33.585793] ? generic_splice_sendpage+0x140/0x140 [ 33.590707] ? security_file_permission+0x1c0/0x220 [ 33.595703] ? generic_splice_sendpage+0x140/0x140 [ 33.600613] direct_splice_actor+0x115/0x160 [ 33.605004] splice_direct_to_actor+0x33f/0x8d0 [ 33.609657] ? generic_pipe_buf_nosteal+0x10/0x10 [ 33.614483] ? do_splice_to+0x160/0x160 [ 33.618441] do_splice_direct+0x1a7/0x270 [ 33.622568] ? splice_direct_to_actor+0x8d0/0x8d0 [ 33.627415] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 33.632421] do_sendfile+0x550/0xc30 [ 33.636121] ? do_compat_pwritev64+0x1b0/0x1b0 [ 33.640689] ? __might_fault+0x192/0x1d0 [ 33.644734] __se_sys_sendfile64+0xc4/0x160 [ 33.649174] ? __se_sys_sendfile+0x180/0x180 [ 33.653565] ? trace_hardirqs_off_caller+0x6e/0x210 [ 33.658562] ? do_syscall_64+0x21/0x620 [ 33.662518] do_syscall_64+0xf9/0x620 [ 33.666304] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 33.671476] RIP: 0033:0x7f7d68d68459 [ 33.675199] 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 [ 33.694094] RSP: 002b:00007ffe62901988 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 [ 33.701784] RAX: ffffffffffffffda RBX: 0000000000000023 RCX: 00007f7d68d68459 [ 33.709033] RDX: 00000000200001c0 RSI: 0000000000000003 RDI: 0000000000000003 [ 33.716292] RBP: 00008080ffffff80 R08: 0000000000000000 R09: 0000000000000000 [ 33.723543] R10: 00008080ffffff80 R11: 0000000000000246 R12: 00007f7d68d27d80 [ 33.730802] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 33.738257] Kernel Offset: disabled [ 33.741908] Rebooting in 86400 seconds..