F2FS-fs (loop2): Can't find valid F2FS filesystem in 2th superblock F2FS-fs (loop2): Magic Mismatch, valid(0xf2f52010) - read(0x0) WARNING: CPU: 0 PID: 26339 at fs/buffer.c:1087 mark_buffer_dirty+0x464/0x5c0 fs/buffer.c:1087 IPVS: ftp: loaded support on port[0] = 21 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 26339 Comm: syz-executor.4 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 F2FS-fs (loop2): Can't find valid F2FS filesystem in 2th superblock 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:mark_buffer_dirty+0x464/0x5c0 fs/buffer.c:1087 Code: c1 ea 03 80 3c 02 00 0f 85 6c 01 00 00 48 8b 3b be 04 00 00 00 e8 3c 7b fd ff 5b 5d 41 5c 41 5d e9 c1 34 b2 ff e8 bc 34 b2 ff <0f> 0b e9 d6 fb ff ff e8 b0 34 b2 ff 0f 0b e9 fa fb ff ff e8 a4 34 RSP: 0018:ffff8880474af880 EFLAGS: 00010293 RAX: ffff88809fd32140 RBX: ffff888047010690 RCX: ffffffff81b04c88 RDX: 0000000000000000 RSI: ffffffff81b050b4 RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffff88805338e2c0 R13: ffffed100a671c7d R14: ffff888047010690 R15: 0000000000000018 bfs_move_block fs/bfs/file.c:43 [inline] bfs_move_blocks fs/bfs/file.c:56 [inline] bfs_get_block+0x3b6/0xd00 fs/bfs/file.c:125 __block_write_begin_int+0x46c/0x17b0 fs/buffer.c:1978 __block_write_begin fs/buffer.c:2028 [inline] block_write_begin+0x58/0x2e0 fs/buffer.c:2087 bfs_write_begin+0x35/0xd0 fs/bfs/file.c:177 generic_perform_write+0x1f8/0x4d0 mm/filemap.c:3170 __generic_file_write_iter+0x24b/0x610 mm/filemap.c:3295 generic_file_write_iter+0x3f8/0x730 mm/filemap.c:3323 call_write_iter include/linux/fs.h:1821 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x51b/0x770 fs/read_write.c:487 vfs_write+0x1f3/0x540 fs/read_write.c:549 ksys_write+0x12b/0x2a0 fs/read_write.c:599 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fec2a715409 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fec2908a168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fec2a827f80 RCX: 00007fec2a715409 RDX: 000000000208e24b RSI: 0000000020000080 RDI: 0000000000000003 RBP: 00007fec2a770367 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe2f4f1e2f R14: 00007fec2908a300 R15: 0000000000022000 Kernel Offset: disabled Rebooting in 86400 seconds..