Buffer I/O error on dev loop0, logical block 7, lost async page write
blk_update_request: I/O error, dev loop0, sector 8
Buffer I/O error on dev loop0, logical block 8, lost async page write
Buffer I/O error on dev loop0, logical block 9, lost async page write
------------[ cut here ]------------
WARNING: CPU: 0 PID: 7052 at fs/buffer.c:1150 mark_buffer_dirty+0x26c/0x480 fs/buffer.c:1150
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 7052 Comm: syz-executor3 Not tainted 4.9.135+ #11
 ffff8801adcd73e0 ffffffff81b36bf9 ffffffff82a38ba0 00000000ffffffff
 0000000000000000 0000000000000000 000000000000047e ffff8801adcd74a0
 ffffffff813f6aa5 0000000041b58ab3 ffffffff82e29bcb ffffffff813f68e6
Call Trace:
 [<ffffffff81b36bf9>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81b36bf9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff813f6aa5>] panic+0x1bf/0x39f kernel/panic.c:179
 [<ffffffff813f6d74>] __warn.cold.9+0xc1/0x17f kernel/panic.c:542
 [<ffffffff810dbe2c>] warn_slowpath_null+0x2c/0x40 kernel/panic.c:585
 [<ffffffff815b864c>] mark_buffer_dirty+0x26c/0x480 fs/buffer.c:1150
 [<ffffffff815bb38c>] __block_commit_write.isra.10+0x13c/0x200 fs/buffer.c:2061
 [<ffffffff815bb49a>] block_write_end+0x4a/0x100 fs/buffer.c:2139
 [<ffffffff815c6949>] blkdev_write_end+0x49/0x120 fs/block_dev.c:339
 [<ffffffff8140f6ac>] generic_perform_write+0x34c/0x500 mm/filemap.c:2764
 [<ffffffff81412532>] __generic_file_write_iter+0x352/0x540 mm/filemap.c:2878
 [<ffffffff815cad47>] blkdev_write_iter+0x1b7/0x370 fs/block_dev.c:1718
 [<ffffffff815071b7>] vfs_iter_write+0x2d7/0x450 fs/read_write.c:390
 [<ffffffff815ae48b>] iter_file_splice_write+0x5fb/0xb30 fs/splice.c:768
 [<ffffffff815a9a48>] do_splice_from fs/splice.c:870 [inline]
 [<ffffffff815a9a48>] direct_splice_actor+0x128/0x190 fs/splice.c:1037
 [<ffffffff815ab651>] splice_direct_to_actor+0x2c1/0x7e0 fs/splice.c:992
 [<ffffffff815abd13>] do_splice_direct+0x1a3/0x270 fs/splice.c:1080
 [<ffffffff8150d770>] do_sendfile+0x4f0/0xc30 fs/read_write.c:1393
 [<ffffffff8150f941>] C_SYSC_sendfile fs/read_write.c:1469 [inline]
 [<ffffffff8150f941>] compat_SyS_sendfile+0xd1/0x160 fs/read_write.c:1458
 [<ffffffff81006311>] do_syscall_32_irqs_on arch/x86/entry/common.c:328 [inline]
 [<ffffffff81006311>] do_fast_syscall_32+0x2f1/0xa10 arch/x86/entry/common.c:390
 [<ffffffff82804960>] entry_SYSENTER_compat+0x90/0xa2 arch/x86/entry/entry_64_compat.S:137
Kernel Offset: disabled
Rebooting in 86400 seconds..