------------[ cut here ]------------ do_preadv+0x1c4/0x280 fs/read_write.c:1071 generic_make_request: Trying to write to read-only block-device nullb0 (partno 0) WARNING: CPU: 1 PID: 32432 at block/blk-core.c:2176 bio_check_ro block/blk-core.c:2176 [inline] WARNING: CPU: 1 PID: 32432 at block/blk-core.c:2176 generic_make_request_checks+0x1fc5/0x24c0 block/blk-core.c:2281 Kernel panic - not syncing: panic_on_warn set ... __do_sys_preadv fs/read_write.c:1121 [inline] __se_sys_preadv fs/read_write.c:1116 [inline] __x64_sys_preadv+0x9a/0xf0 fs/read_write.c:1116 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459879 Code: fd b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ff119499c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000127 RAX: ffffffffffffffda RBX: 00007ff119499c90 RCX: 0000000000459879 RDX: 0000000000000002 RSI: 0000000020000240 RDI: 0000000000000003 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff11949a6d4 R13: 00000000004c6b98 R14: 00000000004dbd88 R15: 0000000000000004 CPU: 1 PID: 32432 Comm: syz-executor.0 Not tainted 4.19.68 #42 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x172/0x1f0 lib/dump_stack.c:113 panic+0x263/0x507 kernel/panic.c:185 __warn.cold+0x20/0x4a kernel/panic.c:540 report_bug+0x263/0x2b0 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] fixup_bug arch/x86/kernel/traps.c:173 [inline] do_error_trap+0x204/0x360 arch/x86/kernel/traps.c:296 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1037 RIP: 0010:bio_check_ro block/blk-core.c:2176 [inline] RIP: 0010:generic_make_request_checks+0x1fc5/0x24c0 block/blk-core.c:2281 Code: 85 1f 04 00 00 45 8b b6 e4 04 00 00 48 8d 73 a0 4c 89 e7 e8 cd 61 06 00 48 c7 c7 60 99 80 87 48 89 c6 44 89 f2 e8 c9 af 2e fe <0f> 0b 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 80 3c 02 kobject: 'loop2' (0000000002ca04db): kobject_uevent_env RSP: 0018:ffff888079b2ef08 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffff888079b2efd8 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8155cdd6 RDI: ffffed100f365dd3 RBP: ffff888079b2f000 R08: ffff888094510100 R09: ffff8880945109a0 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a90b1ac0 R13: ffff8880a90b1ac8 R14: 0000000000000000 R15: 0000000000000000 generic_make_request+0x24c/0x12d0 block/blk-core.c:2405 submit_bio+0xba/0x480 block/blk-core.c:2569 kobject: 'loop2' (0000000002ca04db): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (00000000aba0d77a): kobject_uevent_env kobject: 'loop5' (00000000aba0d77a): fill_kobj_path: path = '/devices/virtual/block/loop5' submit_bh_wbc+0x5dc/0x790 fs/buffer.c:3095 __block_write_full_page+0x76e/0x1010 fs/buffer.c:1766 block_write_full_page+0x21f/0x270 fs/buffer.c:2956 kobject: 'loop5' (00000000aba0d77a): kobject_uevent_env blkdev_writepage+0x25/0x30 fs/block_dev.c:581 __writepage+0x62/0xe0 mm/page-writeback.c:2308 write_cache_pages+0x971/0x1670 mm/page-writeback.c:2240 generic_writepages mm/page-writeback.c:2332 [inline] generic_writepages+0xe6/0x160 mm/page-writeback.c:2321 kobject: 'loop5' (00000000aba0d77a): fill_kobj_path: path = '/devices/virtual/block/loop5' blkdev_writepages+0x1e/0x30 fs/block_dev.c:1965 do_writepages+0xf3/0x2a0 mm/page-writeback.c:2347 __filemap_fdatawrite_range+0x26d/0x340 mm/filemap.c:445 __filemap_fdatawrite mm/filemap.c:453 [inline] filemap_fdatawrite mm/filemap.c:458 [inline] filemap_write_and_wait mm/filemap.c:639 [inline] filemap_write_and_wait+0x47/0xd0 mm/filemap.c:634 __sync_blockdev fs/block_dev.c:463 [inline] sync_blockdev fs/block_dev.c:472 [inline] __blkdev_put+0x204/0x810 fs/block_dev.c:1797 blkdev_put+0x98/0x560 fs/block_dev.c:1866 blkdev_close+0x8b/0xb0 fs/block_dev.c:1873 __fput+0x2dd/0x8b0 fs/file_table.c:278 ____fput+0x16/0x20 fs/file_table.c:309 task_work_run+0x145/0x1c0 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0x994/0x2fa0 kernel/exit.c:876 kobject: 'loop4' (0000000039f8612e): kobject_uevent_env do_group_exit+0x135/0x370 kernel/exit.c:979 get_signal+0x3ec/0x1fc0 kernel/signal.c:2574 kobject: 'loop4' (0000000039f8612e): fill_kobj_path: path = '/devices/virtual/block/loop4' do_signal+0x95/0x1960 arch/x86/kernel/signal.c:821 exit_to_usermode_loop+0x244/0x2c0 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x53d/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459879 Code: fd b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f0cc983dcf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca kobject: 'loop4' (0000000039f8612e): kobject_uevent_env RAX: fffffffffffffe00 RBX: 000000000075bfd0 RCX: 0000000000459879 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000075bfd0 RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000075bfd4 R13: 00007ffcf58507ff R14: 00007f0cc983e9c0 R15: 000000000075bfd4 Kernel Offset: disabled Rebooting in 86400 seconds..