syzbot

EXT4-fs error (device loop3): mb_free_blocks:1510: group 0, inode 16: block 39:freeing already freed block (bit 39); block bitmap corrupt.
Kernel panic - not syncing: EXT4-fs (device loop3): panic forced after error
CPU: 1 PID: 11309 Comm: syz-executor.3 Not tainted 5.10.161-syzkaller-00019-g416c4356f372 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack_lvl+0x1e2/0x24b lib/dump_stack.c:118
 dump_stack+0x15/0x17 lib/dump_stack.c:135
 panic+0x2a0/0x7d7 kernel/panic.c:231
 ext4_handle_error+0x30e/0x310 fs/ext4/super.c:688
 __ext4_grp_locked_error+0x2bc/0x710 fs/ext4/super.c:1004
 mb_free_blocks+0xfc4/0x1260 fs/ext4/mballoc.c:1506
 ext4_free_blocks+0x1b2d/0x2ad0 fs/ext4/mballoc.c:5521
 ext4_remove_blocks+0x893/0x1180 fs/ext4/extents.c:2538
 ext4_ext_rm_leaf+0xaa8/0x18c0 fs/ext4/extents.c:2704
 ext4_ext_remove_space+0xf25/0x22a0 fs/ext4/extents.c:2952
 ext4_ext_truncate+0x18a/0x210 fs/ext4/extents.c:4413
 ext4_truncate+0xba0/0x1270 fs/ext4/inode.c:4356
 ext4_evict_inode+0xf1e/0x1730 fs/ext4/inode.c:288
 evict+0x2a3/0x6c0 fs/inode.c:577
 iput_final fs/inode.c:1655 [inline]
 iput+0x61f/0x7d0 fs/inode.c:1681
 ext4_orphan_cleanup+0xa15/0xdb0 fs/ext4/super.c:3136
 ext4_fill_super+0x8880/0x9150 fs/ext4/super.c:5087
 mount_bdev+0x25f/0x370 fs/super.c:1420
 ext4_mount+0x34/0x40 fs/ext4/super.c:6606
 legacy_get_tree+0xf0/0x190 fs/fs_context.c:592
 vfs_get_tree+0x88/0x290 fs/super.c:1550
 do_new_mount+0x289/0xad0 fs/namespace.c:2899
 path_mount+0x58d/0xce0 fs/namespace.c:3229
 do_mount fs/namespace.c:3242 [inline]
 __do_sys_mount fs/namespace.c:3450 [inline]
 __se_sys_mount+0x2d2/0x3c0 fs/namespace.c:3427
 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3427
 do_syscall_64+0x34/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xc6
RIP: 0033:0x7f2dc57b969a
Code: 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 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:00007f2dc452af88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00000000000004b3 RCX: 00007f2dc57b969a
RDX: 0000000020000000 RSI: 0000000020000500 RDI: 00007f2dc452afe0
RBP: 00007f2dc452b020 R08: 00007f2dc452b020 R09: 000000000200029c
R10: 000000000200029c R11: 0000000000000202 R12: 0000000020000000
R13: 0000000020000500 R14: 00007f2dc452afe0 R15: 0000000020000100
Kernel Offset: disabled
Rebooting in 86400 seconds..