------------[ cut here ]------------
WARNING: CPU: 0 PID: 7207 at fs/inode.c:364 inc_nlink+0x130/0x168 fs/inode.c:364
Modules linked in:
CPU: 0 PID: 7207 Comm: syz.4.686 Not tainted 5.15.165-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : inc_nlink+0x130/0x168 fs/inode.c:364
lr : inc_nlink+0x130/0x168 fs/inode.c:364
sp : ffff80001d417b40
x29: ffff80001d417b40 x28: dfff800000000000 x27: 0000000000000000
x26: 1fffe000181c07e2 x25: ffff800011d1fd48 x24: 0000000000000000
x23: 1fffe0001cddf1cc x22: dfff800000000000 x21: 0000000000000000
x20: ffff0000e6ef8e18 x19: ffff0000e6ef8e60 x18: 0000000000000000
x17: 0000000000000002 x16: ffff800011abbe44 x15: 0000000000000003
x14: 00000000ffff8000 x13: 00000000c09a0a32 x12: 0000000000040000
x11: 0000000000002f2e x10: ffff8000217db000 x9 : 0000000000002f2f
x8 : ffff8000089e8ed0 x7 : 0000000000000000 x6 : 000000000000003f
x5 : 0000000000000040 x4 : 0000000000000000 x3 : 0000000000000010
x2 : 0000000000000008 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 inc_nlink+0x130/0x168 fs/inode.c:364
 inode_inc_link_count include/linux/fs.h:2492 [inline]
 ext2_mkdir+0x54/0x258 fs/ext2/namei.c:241
 vfs_mkdir+0x334/0x4e4 fs/namei.c:4065
 do_mkdirat+0x20c/0x610 fs/namei.c:4090
 __do_sys_mkdirat fs/namei.c:4105 [inline]
 __se_sys_mkdirat fs/namei.c:4103 [inline]
 __arm64_sys_mkdirat+0x90/0xa8 fs/namei.c:4103
 __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+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
irq event stamp: 176662
hardirqs last  enabled at (176661): [<ffff8000088d52d4>] kasan_quarantine_put+0xdc/0x204 mm/kasan/quarantine.c:231
hardirqs last disabled at (176662): [<ffff800011ab7e5c>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396
softirqs last  enabled at (176604): [<ffff8000080308b0>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:31
softirqs last disabled at (176602): [<ffff80000803087c>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:18
---[ end trace 73cf63e82bb551c3 ]---
EXT2-fs (loop4): error: ext2_valid_block_bitmap: Invalid block bitmap - block_group = 0, block = 252
EXT2-fs (loop4): error: ext2_lookup: deleted inode referenced: 12