------------[ cut here ]------------
VFS: brelse: Trying to free free buffer
WARNING: CPU: 0 PID: 6180 at fs/buffer.c:1229 __brelse fs/buffer.c:1229 [inline]
WARNING: CPU: 0 PID: 6180 at fs/buffer.c:1229 brelse include/linux/buffer_head.h:324 [inline]
WARNING: CPU: 0 PID: 6180 at fs/buffer.c:1229 bh_lru_install fs/buffer.c:1346 [inline]
WARNING: CPU: 0 PID: 6180 at fs/buffer.c:1229 __find_get_block+0x109d/0x1150 fs/buffer.c:1400
Modules linked in:
CPU: 0 UID: 0 PID: 6180 Comm: syz.0.42 Not tainted 6.13.0-rc4-syzkaller-00012-g9b2ffa6148b1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:__brelse fs/buffer.c:1229 [inline]
RIP: 0010:brelse include/linux/buffer_head.h:324 [inline]
RIP: 0010:bh_lru_install fs/buffer.c:1346 [inline]
RIP: 0010:__find_get_block+0x109d/0x1150 fs/buffer.c:1400
Code: c7 3c 9a e8 05 60 dc ff e9 1b f7 ff ff e8 8b 83 78 ff e9 87 f7 ff ff e8 81 83 78 ff 90 48 c7 c7 e0 f0 18 8c e8 a4 26 39 ff 90 <0f> 0b 90 90 e9 6b f7 ff ff e8 65 83 78 ff 48 c7 c7 c0 c8 a8 8e 4c
RSP: 0018:ffffc9000446f400 EFLAGS: 00010246
RAX: 90af46064ac14f00 RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc90005102000 RSI: 00000000000533b9 RDI: 00000000000533ba
RBP: ffffc9000446f528 R08: ffffffff816019a2 R09: 1ffff110170e519a
R10: dffffc0000000000 R11: ffffed10170e519b R12: ffff8880593570e8
R13: ffff8880b87398b0 R14: ffff88805a24f000 R15: ffff888078befc28
FS:  00007fe6fcb7e6c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc7b420fe00 CR3: 0000000031b58000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __getblk_slow fs/buffer.c:1127 [inline]
 bdev_getblk+0x189/0x670 fs/buffer.c:1431
 ext4_sb_breadahead_unmovable+0x6a/0xf0 fs/ext4/super.c:271
 __ext4_get_inode_loc+0xb6c/0xfb0 fs/ext4/inode.c:4523
 __ext4_get_inode_loc_noinmem fs/ext4/inode.c:4553 [inline]
 __ext4_iget+0x4fd/0x3f60 fs/ext4/inode.c:4775
 __ext4_fill_super fs/ext4/super.c:5505 [inline]
 ext4_fill_super+0x572d/0x6e60 fs/ext4/super.c:5733
 get_tree_bdev_flags+0x48c/0x5c0 fs/super.c:1636
 vfs_get_tree+0x90/0x2b0 fs/super.c:1814
 do_new_mount+0x2be/0xb40 fs/namespace.c:3507
 do_mount fs/namespace.c:3847 [inline]
 __do_sys_mount fs/namespace.c:4057 [inline]
 __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4034
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe6fbd874ca
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe6fcb7de68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fe6fcb7def0 RCX: 00007fe6fbd874ca
RDX: 0000000020000040 RSI: 0000000020000200 RDI: 00007fe6fcb7deb0
RBP: 0000000020000040 R08: 00007fe6fcb7def0 R09: 0000000000200000
R10: 0000000000200000 R11: 0000000000000246 R12: 0000000020000200
R13: 00007fe6fcb7deb0 R14: 0000000000000550 R15: 00000000200002c0
 </TASK>