------------[ cut here ]------------
VFS: brelse: Trying to free free buffer
WARNING: CPU: 0 PID: 3526 at fs/buffer.c:1148 __brelse fs/buffer.c:1148 [inline]
WARNING: CPU: 0 PID: 3526 at fs/buffer.c:1148 brelse include/linux/buffer_head.h:325 [inline]
WARNING: CPU: 0 PID: 3526 at fs/buffer.c:1148 bh_lru_install fs/buffer.c:1262 [inline]
WARNING: CPU: 0 PID: 3526 at fs/buffer.c:1148 __find_get_block+0x110e/0x1350 fs/buffer.c:1312
Modules linked in:
CPU: 0 PID: 3526 Comm: syz-executor.1 Not tainted 5.15.160-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:__brelse fs/buffer.c:1148 [inline]
RIP: 0010:brelse include/linux/buffer_head.h:325 [inline]
RIP: 0010:bh_lru_install fs/buffer.c:1262 [inline]
RIP: 0010:__find_get_block+0x110e/0x1350 fs/buffer.c:1312
Code: 58 d0 9a ff e8 53 50 a1 ff fb e9 e4 f1 ff ff e8 48 d0 9a ff e9 da f1 ff ff e8 3e d0 9a ff 48 c7 c7 a0 6b 97 8a e8 82 78 66 ff <0f> 0b e9 c2 f1 ff ff 44 89 f1 80 e1 07 38 c1 0f 8c 86 f2 ff ff 4c
RSP: 0018:ffffc90002da7760 EFLAGS: 00010246
RAX: 4b1416860b288b00 RBX: 0000000000000000 RCX: ffff888073869dc0
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc90002da78c0 R08: ffffffff8166860c R09: ffffed1017344f24
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8880185761d0
R13: 1ffff11017346cbe R14: ffff888074ae5658 R15: ffff88807185ec28
FS:  0000555556dc9480(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555556dd2938 CR3: 0000000064a01000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __getblk_gfp+0x2d/0xaf0 fs/buffer.c:1332
 sb_getblk include/linux/buffer_head.h:361 [inline]
 ext4_getblk+0x259/0x710 fs/ext4/inode.c:853
 ext4_bread+0x2a/0x170 fs/ext4/inode.c:899
 ext4_append+0x31f/0x5c0 fs/ext4/namei.c:83
 ext4_init_new_dir+0x33a/0xa20 fs/ext4/namei.c:2981
 ext4_mkdir+0x4f2/0xce0 fs/ext4/namei.c:3027
 vfs_mkdir+0x3b6/0x590 fs/namei.c:4065
 do_mkdirat+0x260/0x520 fs/namei.c:4090
 __do_sys_mkdirat fs/namei.c:4105 [inline]
 __se_sys_mkdirat fs/namei.c:4103 [inline]
 __x64_sys_mkdirat+0x85/0x90 fs/namei.c:4103
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fd8bcc8b9a7
Code: 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 02 01 00 00 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:00007ffe9ec95208 EFLAGS: 00000202 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007ffe9ec95280 RCX: 00007fd8bcc8b9a7
RDX: 00000000000001ff RSI: 00007ffe9ec95280 RDI: 00000000ffffff9c
RBP: 00007ffe9ec9525c R08: 0000000000000003 R09: 00007ffe9ec94fa7
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000032
R13: 000000000000cbd8 R14: 000000000000cbce R15: 0000000000000001
 </TASK>