alloc_inode+0x5d/0x180 fs/inode.c:211 ------------[ cut here ]------------ new_inode_pseudo fs/inode.c:911 [inline] new_inode+0x1d/0xf0 fs/inode.c:940 __ext4_new_inode+0x400/0x5a20 fs/ext4/ialloc.c:831 generic_make_request: Trying to write to read-only block-device nullb0 (partno 0) WARNING: CPU: 0 PID: 15632 at block/blk-core.c:2183 bio_check_ro block/blk-core.c:2183 [inline] WARNING: CPU: 0 PID: 15632 at block/blk-core.c:2183 generic_make_request_checks+0x17d9/0x22e0 block/blk-core.c:2288 Kernel panic - not syncing: panic_on_warn set ... ext4_mkdir+0x396/0xe10 fs/ext4/namei.c:2696 vfs_mkdir+0x508/0x7a0 fs/namei.c:3819 do_mkdirat+0x262/0x2d0 fs/namei.c:3842 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fc4b12d8b47 Code: 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc4ae84efa8 EFLAGS: 00000213 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00000000200009c0 RCX: 00007fc4b12d8b47 RDX: 0000000000000004 RSI: 00000000000001ff RDI: 0000000020000100 RBP: 00007fc4ae84f040 R08: 0000000000000000 R09: ffffffffffffffff R10: 0000000000000000 R11: 0000000000000213 R12: 0000000020000000 R13: 0000000020000100 R14: 00007fc4ae84f000 R15: 00000000200005c0 CPU: 0 PID: 15632 Comm: syz-executor.2 Not tainted 4.19.211-syzkaller #0 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+0x1fc/0x2ef lib/dump_stack.c:118 panic+0x26a/0x50e kernel/panic.c:186 __warn.cold+0x20/0x5a kernel/panic.c:541 report_bug+0x262/0x2b0 lib/bug.c:183 fixup_bug arch/x86/kernel/traps.c:178 [inline] fixup_bug arch/x86/kernel/traps.c:173 [inline] do_error_trap+0x1d7/0x310 arch/x86/kernel/traps.c:296 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1038 RIP: 0010:bio_check_ro block/blk-core.c:2183 [inline] RIP: 0010:generic_make_request_checks+0x17d9/0x22e0 block/blk-core.c:2288 Code: ca 0a 00 00 45 8b b6 1c 05 00 00 48 8d 74 24 68 48 89 ef e8 b9 14 06 00 48 c7 c7 00 29 b2 88 48 89 c6 44 89 f2 e8 4c 94 91 04 <0f> 0b 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 80 3c 02 RSP: 0018:ffff8881aebdf0b0 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffff8880ade32040 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff814dff01 RDI: ffffed1035d7be08 RBP: ffff888094b3a840 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: ffff888094b3a870 R13: ffff888094b3a848 R14: 0000000000000000 R15: 0000000000000000 generic_make_request+0x23f/0xdf0 block/blk-core.c:2412 submit_bio+0xb1/0x430 block/blk-core.c:2576 submit_bh_wbc+0x5a7/0x760 fs/buffer.c:3090 __block_write_full_page+0x71a/0xf60 fs/buffer.c:1777 block_write_full_page+0x1f3/0x260 fs/buffer.c:2951 __writepage+0x5e/0xe0 mm/page-writeback.c:2305 write_cache_pages+0x802/0x12d0 mm/page-writeback.c:2240 generic_writepages mm/page-writeback.c:2329 [inline] generic_writepages+0xdb/0x150 mm/page-writeback.c:2318 do_writepages+0xe5/0x290 mm/page-writeback.c:2344 __filemap_fdatawrite_range+0x27d/0x350 mm/filemap.c:446 __filemap_fdatawrite mm/filemap.c:454 [inline] filemap_fdatawrite mm/filemap.c:459 [inline] filemap_write_and_wait mm/filemap.c:640 [inline] filemap_write_and_wait+0x42/0xd0 mm/filemap.c:635 __sync_blockdev fs/block_dev.c:463 [inline] sync_blockdev fs/block_dev.c:472 [inline] __blkdev_put+0x682/0x870 fs/block_dev.c:1804 blkdev_close+0x86/0xb0 fs/block_dev.c:1888 __fput+0x2ce/0x890 fs/file_table.c:278 task_work_run+0x148/0x1c0 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0xbf3/0x2be0 kernel/exit.c:870 do_group_exit+0x125/0x310 kernel/exit.c:967 get_signal+0x3f2/0x1f70 kernel/signal.c:2589 do_signal+0x8f/0x1670 arch/x86/kernel/signal.c:799 exit_to_usermode_loop+0x204/0x2a0 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+0x538/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fc46e034a39 Code: Bad RIP value. RSP: 002b:00007fc46b568218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: 0000000000000001 RBX: 00007fc46e1380e8 RCX: 00007fc46e034a39 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fc46e1380ec RBP: 00007fc46e1380e0 R08: 000000000000000e R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc46e1380ec R13: 00007fffc2892daf R14: 00007fc46b568300 R15: 0000000000022000 Kernel Offset: disabled Rebooting in 86400 seconds..