EXT4-fs warning (device loop0): ext4_update_dynamic_rev:1062: 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: 0 PID: 4436 Comm: syz-executor.0 Not tainted 5.15.182-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
Call trace:
 dump_backtrace+0x0/0x43c arch/arm64/kernel/stacktrace.c:152
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106
 dump_stack+0x1c/0x5c lib/dump_stack.c:113
 panic+0x2e4/0x854 kernel/panic.c:309
 ext4_handle_error+0x618/0x6c0 fs/ext4/super.c:668
 __ext4_error+0x1d8/0x298 fs/ext4/super.c:760
 ext4_validate_block_bitmap+0xc64/0xfc0 fs/ext4/balloc.c:-1
 ext4_wait_block_bitmap+0x194/0x1e0 fs/ext4/balloc.c:579
 ext4_read_block_bitmap+0x54/0xe8 fs/ext4/balloc.c:591
 ext4_mb_clear_bb fs/ext4/mballoc.c:6040 [inline]
 ext4_free_blocks+0xb58/0x23cc fs/ext4/mballoc.c:6286
 ext4_remove_blocks fs/ext4/extents.c:2523 [inline]
 ext4_ext_rm_leaf fs/ext4/extents.c:2689 [inline]
 ext4_ext_remove_space+0x1d98/0x3830 fs/ext4/extents.c:2937
 ext4_ext_truncate+0x184/0x24c fs/ext4/extents.c:4471
 ext4_truncate+0x9c0/0xf94 fs/ext4/inode.c:4250
 ext4_process_orphan+0x17c/0x2b4 fs/ext4/orphan.c:339
 ext4_orphan_cleanup+0x888/0xf8c fs/ext4/orphan.c:474
 ext4_fill_super+0x7a5c/0x812c fs/ext4/super.c:4975
 mount_bdev+0x264/0x358 fs/super.c:1400
 ext4_mount+0x44/0x58 fs/ext4/super.c:6627
 legacy_get_tree+0xd4/0x16c fs/fs_context.c:611
 vfs_get_tree+0x90/0x274 fs/super.c:1530
 do_new_mount+0x228/0x810 fs/namespace.c:3013
 path_mount+0x5b4/0x1000 fs/namespace.c:3343
 do_mount fs/namespace.c:3356 [inline]
 __do_sys_mount fs/namespace.c:3564 [inline]
 __se_sys_mount fs/namespace.c:3541 [inline]
 __arm64_sys_mount+0x514/0x5e4 fs/namespace.c:3541
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
SMP: stopping secondary CPUs
Kernel Offset: disabled
CPU features: 0x8,000081c1,21302e40
Memory Limit: none
Rebooting in 86400 seconds..