[ OK ] Reached target Login Prompts. [ 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. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.148' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 27.845523] BFS-fs: bfs_fill_super(): loop3 is unclean, continuing [ 27.854298] BFS-fs: bfs_fill_super(): loop1 is unclean, continuing [ 27.865662] BFS-fs: bfs_fill_super(): loop0 is unclean, continuing [ 27.868520] BFS-fs: bfs_fill_super(): loop4 is unclean, continuing [ 27.882258] BFS-fs: bfs_fill_super(): loop5 is unclean, continuing [ 27.889196] BFS-fs: bfs_fill_super(): loop2 is unclean, continuing [ 27.891649] audit: type=1804 audit(1644480899.183:2): pid=7996 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor381" name="/root/file0/bus" dev="loop1" ino=3 res=1 [ 27.929211] ------------[ cut here ]------------ [ 27.934126] WARNING: CPU: 1 PID: 8001 at fs/buffer.c:1149 mark_buffer_dirty+0x347/0x480 [ 27.942257] Kernel panic - not syncing: panic_on_warn set ... [ 27.942257] [ 27.949622] CPU: 1 PID: 8001 Comm: syz-executor381 Not tainted 4.14.265-syzkaller #0 [ 27.957492] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.966835] Call Trace: [ 27.969421] dump_stack+0x1b2/0x281 [ 27.973044] panic+0x1f9/0x42d [ 27.976230] ? add_taint.cold+0x16/0x16 [ 27.979682] audit: type=1804 audit(1644480899.213:3): pid=8009 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor381" name="/root/file0/bus" dev="loop2" ino=3 res=1 [ 27.980198] ? mark_buffer_dirty+0x347/0x480 [ 27.980212] ? mark_buffer_dirty+0x347/0x480 [ 27.980220] __warn.cold+0x20/0x44 [ 27.980231] ? ist_end_non_atomic+0x10/0x10 [ 28.015366] ? mark_buffer_dirty+0x347/0x480 [ 28.019768] report_bug+0x208/0x250 [ 28.023390] do_error_trap+0x195/0x2d0 [ 28.027275] ? math_error+0x2d0/0x2d0 [ 28.031072] ? mark_held_locks+0xa6/0xf0 [ 28.035125] ? __find_get_block+0x817/0xc40 [ 28.039440] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.044280] invalid_op+0x1b/0x40 [ 28.047730] RIP: 0010:mark_buffer_dirty+0x347/0x480 [ 28.052731] RSP: 0018:ffff8880b36df450 EFLAGS: 00010297 [ 28.058082] audit: type=1804 audit(1644480899.223:4): pid=8008 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor381" name="/root/file0/bus" dev="loop5" ino=3 res=1 [ 28.058504] audit: type=1804 audit(1644480899.223:5): pid=8001 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor381" name="/root/file0/bus" dev="loop5" ino=3 res=1 [ 28.076621] RAX: ffff8880963ce000 RBX: ffff88808d3c09d8 RCX: 0000000000000000 [ 28.076627] RDX: 0000000000000000 RSI: ffff88808c700400 RDI: ffff88808d3c09d8 [ 28.076631] RBP: ffffed1012b719c5 R08: 0000000000000001 R09: ffffed10118d853f [ 28.076635] R10: ffff88808c6c29ff R11: 0000000000000000 R12: 0000000000000009 [ 28.076640] R13: ffff888095b8cd00 R14: ffff88808d3c09d8 R15: ffff88808d3bed20 [ 28.076664] bfs_get_block+0x35c/0xaf0 [ 28.076678] ? find_get_entry+0x312/0x630 [ 28.076686] ? create_page_buffers+0xce/0x1c0 executing program [ 28.076698] __block_write_begin_int+0x35c/0x1090 [ 28.076706] ? bfs_bmap+0x30/0x30 [ 28.097721] audit: type=1804 audit(1644480899.223:6): pid=8001 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor381" name="/root/file0/bus" dev="loop5" ino=3 res=1 [ 28.101992] ? __breadahead_gfp+0x150/0x150 [ 28.102004] ? wait_for_stable_page+0xe3/0x260 [ 28.102013] ? bfs_bmap+0x30/0x30 [ 28.102019] block_write_begin+0x58/0x270 [ 28.102027] bfs_write_begin+0x35/0xc0 [ 28.102037] generic_perform_write+0x1c9/0x420 executing program [ 28.102049] ? filemap_page_mkwrite+0x2d0/0x2d0 [ 28.116404] audit: type=1804 audit(1644480899.223:7): pid=7995 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor381" name="/root/file0/bus" dev="loop1" ino=3 res=1 [ 28.116556] ? current_time+0xb0/0xb0 [ 28.129120] audit: type=1804 audit(1644480899.223:8): pid=8005 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor381" name="/root/file0/bus" dev="loop0" ino=3 res=1 [ 28.131060] ? lock_acquire+0x170/0x3f0 executing program [ 28.131074] __generic_file_write_iter+0x227/0x590 [ 28.131084] generic_file_write_iter+0x36f/0x650 [ 28.131094] ? iov_iter_init+0xa6/0x1c0 [ 28.143354] audit: type=1804 audit(1644480899.223:9): pid=8027 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor381" name="/root/file0/bus" dev="loop1" ino=3 res=1 [ 28.143565] __vfs_write+0x44c/0x630 executing program executing program [ 28.155875] audit: type=1804 audit(1644480899.223:10): pid=8031 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor381" name="/root/file0/bus" dev="loop0" ino=3 res=1 [ 28.170370] ? put_timespec64+0xf0/0xf0 [ 28.170380] ? kernel_read+0x110/0x110 [ 28.170387] ? current_time+0x16/0xb0 [ 28.170399] ? mark_held_locks+0xa6/0xf0 [ 28.170412] __kernel_write+0xf5/0x330 [ 28.217319] audit: type=1804 audit(1644480899.223:11): pid=8033 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor381" name="/root/file0/bus" dev="loop0" ino=3 res=1 [ 28.217923] write_pipe_buf+0x143/0x1c0 [ 28.217934] ? default_file_splice_read+0x910/0x910 executing program [ 28.217943] ? page_cache_pipe_buf_confirm+0x18f/0x260 [ 28.350998] __splice_from_pipe+0x326/0x7a0 [ 28.355313] ? default_file_splice_read+0x910/0x910 [ 28.360324] default_file_splice_write+0xc5/0x150 [ 28.365155] ? generic_splice_sendpage+0x110/0x110 [ 28.370077] ? rw_verify_area+0xe1/0x2a0 [ 28.374129] ? generic_splice_sendpage+0x110/0x110 [ 28.379044] direct_splice_actor+0x115/0x160 [ 28.383442] splice_direct_to_actor+0x27c/0x730 [ 28.388105] ? generic_pipe_buf_nosteal+0x10/0x10 [ 28.392936] ? do_splice_to+0x140/0x140 executing program [ 28.396896] ? rw_verify_area+0xe1/0x2a0 [ 28.400951] do_splice_direct+0x164/0x210 [ 28.405087] ? splice_direct_to_actor+0x730/0x730 [ 28.409923] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 28.414925] do_sendfile+0x47f/0xb30 [ 28.418621] ? do_compat_writev+0x180/0x180 [ 28.422932] ? SyS_futex+0x1da/0x290 [ 28.426636] SyS_sendfile64+0xff/0x110 [ 28.430507] ? SyS_sendfile+0x130/0x130 [ 28.434467] ? fput_many+0xe/0x140 [ 28.437998] ? do_syscall_64+0x4c/0x640 [ 28.441959] ? SyS_sendfile+0x130/0x130 executing program executing program [ 28.445935] do_syscall_64+0x1d5/0x640 [ 28.449823] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 28.455003] RIP: 0033:0x7f4ce4db9639 [ 28.458706] RSP: 002b:00007f4ce4d662f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 [ 28.466406] RAX: ffffffffffffffda RBX: 00007f4ce4e3e420 RCX: 00007f4ce4db9639 [ 28.473670] RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000003 [ 28.480928] RBP: 00007f4ce4e0b0bc R08: 0000000000000000 R09: 0000000000000000 [ 28.488188] R10: 00008400fffffffa R11: 0000000000000246 R12: 0030656c69662f2e [ 28.495451] R13: 000010011badface R14: 75ca34411a118209 R15: 00007f4ce4e3e428 [ 28.503028] Kernel Offset: disabled [ 28.506688] Rebooting in 86400 seconds..