blk_update_request: I/O error, dev loop0, sector 32 Buffer I/O error on dev loop0, logical block 8, lost async page write blk_update_request: I/O error, dev loop0, sector 36 Buffer I/O error on dev loop0, logical block 9, lost async page write ------------[ cut here ]------------ WARNING: CPU: 0 PID: 29053 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: 29053 Comm: syz-executor4 Not tainted 4.9.144+ #77 ffff88019b5cf3f0 ffffffff81b43b89 ffffffff82a39060 00000000ffffffff ffffffff82ab7b00 0000000000000000 0000000000000009 ffff88019b5cf4b0 ffffffff813f7575 0000000041b58ab3 ffffffff82e2e82b ffffffff813f73b6 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] panic+0x1bf/0x39f kernel/panic.c:179 [] __warn.cold.8+0x2f/0x2f kernel/panic.c:542 [] warn_slowpath_null+0x2c/0x40 kernel/panic.c:585 [] mark_buffer_dirty+0x26c/0x480 fs/buffer.c:1150 [] __block_commit_write.isra.10+0x13c/0x200 fs/buffer.c:2061 [] block_write_end+0x4a/0x100 fs/buffer.c:2139 [] blkdev_write_end+0x49/0x120 fs/block_dev.c:339 [] generic_perform_write+0x34c/0x500 mm/filemap.c:2764 [] __generic_file_write_iter+0x352/0x540 mm/filemap.c:2878 [] blkdev_write_iter+0x1b7/0x370 fs/block_dev.c:1718 [] vfs_iter_write+0x2d7/0x450 fs/read_write.c:390 [] iter_file_splice_write+0x5fb/0xb30 fs/splice.c:768 [] do_splice_from fs/splice.c:870 [inline] [] direct_splice_actor+0x128/0x190 fs/splice.c:1037 [] splice_direct_to_actor+0x2c1/0x7e0 fs/splice.c:992 [] do_splice_direct+0x1a3/0x270 fs/splice.c:1080 [] do_sendfile+0x4f0/0xc30 fs/read_write.c:1393 [] SYSC_sendfile64 fs/read_write.c:1448 [inline] [] SyS_sendfile64+0xd1/0x160 fs/read_write.c:1440 [] do_syscall_64+0x19f/0x550 arch/x86/entry/common.c:285 [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb Kernel Offset: disabled Rebooting in 86400 seconds..