[ 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 '10.128.0.114' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 53.195771] BFS-fs: bfs_fill_super(): loop1 is unclean, continuing [ 53.195776] BFS-fs: bfs_fill_super(): loop5 is unclean, continuing [ 53.213075] audit: type=1804 audit(1642718928.295:2): pid=8103 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor897" name="/root/file0/bus" dev="loop1" ino=3 res=1 [ 53.245700] BFS-fs: bfs_fill_super(): loop0 is unclean, continuing [ 53.259370] audit: type=1804 audit(1642718928.295:3): pid=8102 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor897" name="/root/file0/bus" dev="loop5" ino=3 res=1 [ 53.280949] BFS-fs: bfs_fill_super(): loop2 is unclean, continuing [ 53.289460] WARNING: CPU: 1 PID: 8103 at fs/buffer.c:1087 mark_buffer_dirty+0x464/0x5c0 [ 53.297725] Kernel panic - not syncing: panic_on_warn set ... [ 53.297725] [ 53.305091] CPU: 1 PID: 8103 Comm: syz-executor897 Not tainted 4.19.211-syzkaller #0 [ 53.312961] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 53.322310] Call Trace: [ 53.324894] dump_stack+0x1fc/0x2ef [ 53.328527] panic+0x26a/0x50e [ 53.331725] ? __warn_printk+0xf3/0xf3 [ 53.335616] ? mark_buffer_dirty+0x464/0x5c0 [ 53.340020] ? __probe_kernel_read+0x130/0x1b0 [ 53.344598] ? __warn.cold+0x5/0x5a [ 53.348225] ? __warn+0xe4/0x200 [ 53.351592] ? mark_buffer_dirty+0x464/0x5c0 [ 53.355997] __warn.cold+0x20/0x5a [ 53.359539] ? mark_buffer_dirty+0x464/0x5c0 [ 53.363944] report_bug+0x262/0x2b0 [ 53.367575] do_error_trap+0x1d7/0x310 [ 53.371466] ? math_error+0x310/0x310 [ 53.375270] ? lock_downgrade+0x720/0x720 [ 53.379419] ? error_entry+0x72/0xd0 [ 53.383133] ? trace_hardirqs_off_caller+0x6e/0x210 [ 53.388159] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 53.393011] invalid_op+0x14/0x20 [ 53.396471] RIP: 0010:mark_buffer_dirty+0x464/0x5c0 [ 53.401487] Code: c1 ea 03 80 3c 02 00 0f 85 6c 01 00 00 48 8b 3b be 04 00 00 00 e8 3c 7b fd ff 5b 5d 41 5c 41 5d e9 c1 34 b2 ff e8 bc 34 b2 ff <0f> 0b e9 d6 fb ff ff e8 b0 34 b2 ff 0f 0b e9 fa fb ff ff e8 a4 34 [ 53.420390] RSP: 0018:ffff888091f2f338 EFLAGS: 00010293 [ 53.423919] audit: type=1804 audit(1642718928.375:4): pid=8128 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor897" name="/root/file0/bus" dev="loop2" ino=3 res=1 [ 53.425752] RAX: ffff8880953c6600 RBX: ffff88808b424930 RCX: ffffffff81b04c88 [ 53.425765] RDX: 0000000000000000 RSI: ffffffff81b050b4 RDI: 0000000000000001 [ 53.425771] RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 [ 53.425778] R10: 0000000000000001 R11: 0000000000000000 R12: ffff8880b01ac400 [ 53.425785] R13: ffffed10160358a5 R14: ffff88808b424930 R15: 0000000000000018 [ 53.425812] ? mark_buffer_dirty+0x38/0x5c0 [ 53.425823] ? mark_buffer_dirty+0x464/0x5c0 [ 53.425838] ? mark_buffer_dirty+0x464/0x5c0 [ 53.491267] audit: type=1804 audit(1642718928.375:5): pid=8111 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor897" name="/root/file0/bus" dev="loop2" ino=3 res=1 [ 53.494909] bfs_get_block+0x3b6/0xd00 [ 53.494932] ? create_page_buffers+0x190/0x350 [ 53.494948] __block_write_begin_int+0x46c/0x17b0 [ 53.494963] ? bfs_bmap+0x30/0x30 [ 53.530542] BFS-fs: bfs_fill_super(): loop4 is unclean, continuing [ 53.533348] ? __breadahead_gfp+0x130/0x130 [ 53.533368] ? wait_for_stable_page+0x122/0x360 [ 53.552073] ? bfs_bmap+0x30/0x30 [ 53.555532] block_write_begin+0x58/0x2e0 [ 53.559692] bfs_write_begin+0x35/0xd0 [ 53.563585] generic_perform_write+0x1f8/0x4d0 [ 53.568175] ? filemap_page_mkwrite+0x2f0/0x2f0 [ 53.572849] ? current_time+0x1c0/0x1c0 [ 53.576830] ? lock_acquire+0x170/0x3c0 [ 53.580808] __generic_file_write_iter+0x24b/0x610 [ 53.585740] generic_file_write_iter+0x3f8/0x730 [ 53.590503] __vfs_write+0x51b/0x770 [ 53.594219] ? kernel_read+0x110/0x110 [ 53.598113] ? ktime_get_coarse_real_ts64+0x1c7/0x290 [ 53.603322] __kernel_write+0x109/0x370 [ 53.607304] write_pipe_buf+0x153/0x1f0 [ 53.611287] ? default_file_splice_read+0xa00/0xa00 [ 53.616307] ? splice_from_pipe_next.part.0+0x2ad/0x360 [ 53.621678] ? page_cache_pipe_buf_confirm+0x1e5/0x2a0 [ 53.626960] __splice_from_pipe+0x389/0x800 [ 53.631287] ? default_file_splice_read+0xa00/0xa00 [ 53.636310] default_file_splice_write+0xd8/0x180 [ 53.641155] ? generic_splice_sendpage+0x140/0x140 [ 53.641432] audit: type=1804 audit(1642718928.375:6): pid=8111 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor897" name="/root/file0/bus" dev="loop2" ino=3 res=1 [ 53.646082] ? security_file_permission+0x1c0/0x220 [ 53.646099] ? generic_splice_sendpage+0x140/0x140 [ 53.646115] direct_splice_actor+0x115/0x160 [ 53.646131] splice_direct_to_actor+0x33f/0x8d0 [ 53.646149] ? generic_pipe_buf_nosteal+0x10/0x10 [ 53.646169] ? do_splice_to+0x160/0x160 [ 53.693591] do_splice_direct+0x1a7/0x270 [ 53.697744] ? splice_direct_to_actor+0x8d0/0x8d0 [ 53.702598] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 53.707626] do_sendfile+0x550/0xc30 [ 53.711350] ? do_compat_pwritev64+0x1b0/0x1b0 [ 53.715937] ? __se_sys_futex+0x28f/0x3b0 [ 53.720085] ? __se_sys_futex+0x298/0x3b0 [ 53.724248] __se_sys_sendfile64+0x147/0x160 [ 53.728660] ? __se_sys_sendfile+0x180/0x180 [ 53.733074] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 53.738442] ? trace_hardirqs_off_caller+0x6e/0x210 [ 53.743462] ? do_syscall_64+0x21/0x620 [ 53.747443] do_syscall_64+0xf9/0x620 [ 53.751272] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 53.756456] RIP: 0033:0x7f259a475639 [ 53.760171] 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 b8 ff ff ff f7 d8 64 89 01 48 [ 53.779079] RSP: 002b:00007f259a4222f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 [ 53.786253] audit: type=1804 audit(1642718928.375:7): pid=8116 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor897" name="/root/file0/bus" dev="loop4" ino=3 res=1 [ 53.786785] RAX: ffffffffffffffda RBX: 00007f259a4fa420 RCX: 00007f259a475639 [ 53.786793] RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000003 [ 53.786801] RBP: 00007f259a4c70bc R08: 0000000000000000 R09: 0000000000000000 [ 53.786808] R10: 00008400fffffffa R11: 0000000000000246 R12: 0030656c69662f2e [ 53.786816] R13: 000010011badface R14: 75ca34411a118209 R15: 00007f259a4fa428 [ 53.806759] Kernel Offset: disabled [ 53.846603] Rebooting in 86400 seconds..