loop0: detected capacity change from 0 to 512
ext2: Unknown parameter 'ÿÿÿÿ'
EXT4-fs (loop0): feature flags set on rev 0 fs, running e2fsck is recommended
EXT4-fs (loop0): warning: checktime reached, running e2fsck is recommended
EXT4-fs warning (device loop0): ext4_update_dynamic_rev:1087: updating to rev 1 because of new feature flag, running e2fsck is recommended
EXT4-fs error (device loop0): ext4_validate_block_bitmap:429: comm syz-executor.0: bg 0: block 46: invalid block bitmap
Kernel panic - not syncing: EXT4-fs (device loop0): panic forced after error
CPU: 1 PID: 337 Comm: syz-executor.0 Not tainted 6.1.138-syzkaller-1169882-g6246d345f550 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 <TASK>
 __dump_stack+0x21/0x24 lib/dump_stack.c:88
 dump_stack_lvl+0xee/0x150 lib/dump_stack.c:106
 dump_stack+0x15/0x24 lib/dump_stack.c:113
 panic+0x283/0x698 kernel/panic.c:339
 ext4_handle_error+0x7a3/0x860 fs/ext4/super.c:687
 __ext4_error+0x214/0x400 fs/ext4/super.c:779
 ext4_validate_block_bitmap+0x79e/0x870 fs/ext4/balloc.c:-1
 ext4_wait_block_bitmap+0x13d/0x1c0 fs/ext4/balloc.c:580
 ext4_read_block_bitmap+0x41/0x80 fs/ext4/balloc.c:592
 ext4_mb_clear_bb fs/ext4/mballoc.c:6027 [inline]
 ext4_free_blocks+0xd65/0x2100 fs/ext4/mballoc.c:6273
 ext4_remove_blocks fs/ext4/extents.c:2525 [inline]
 ext4_ext_rm_leaf fs/ext4/extents.c:2691 [inline]
 ext4_ext_remove_space+0x1b7d/0x3fb0 fs/ext4/extents.c:2939
 ext4_ext_truncate+0x200/0x320 fs/ext4/extents.c:4469
 ext4_truncate+0x9a6/0xf90 fs/ext4/inode.c:4291
 ext4_process_orphan+0x1d9/0x320 fs/ext4/orphan.c:339
 ext4_orphan_cleanup+0xb02/0x1210 fs/ext4/orphan.c:474
 __ext4_fill_super fs/ext4/super.c:5510 [inline]
 ext4_fill_super+0x73ad/0x78f0 fs/ext4/super.c:5641
 get_tree_bdev+0x444/0x680 fs/super.c:1368
 ext4_get_tree+0x1c/0x20 fs/ext4/super.c:5671
 vfs_get_tree+0x9a/0x270 fs/super.c:1575
 do_new_mount+0x25a/0xa20 fs/namespace.c:3057
 path_mount+0x675/0x1010 fs/namespace.c:3387
 do_mount fs/namespace.c:3400 [inline]
 __do_sys_mount fs/namespace.c:3608 [inline]
 __se_sys_mount+0x318/0x380 fs/namespace.c:3585
 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3585
 x64_sys_call+0x65d/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:166
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f8fefc7cae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 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 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8fef7ff0c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f8fefd9bf80 RCX: 00007f8fefc7cae9
RDX: 00000000200001c0 RSI: 00000000200006c0 RDI: 0000000020000640
RBP: 00007f8fefcc847a R08: 0000000000000000 R09: 0000000000000000
R10: 000000003f000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f8fefd9bf80 R15: 00007fff97da1198
 </TASK>
Kernel Offset: disabled
Rebooting in 86400 seconds..