------------[ cut here ]------------
VFS: brelse: Trying to free free buffer
WARNING: CPU: 1 PID: 8074 at fs/buffer.c:1229 __brelse fs/buffer.c:1229 [inline]
WARNING: CPU: 1 PID: 8074 at fs/buffer.c:1229 __brelse+0x6d/0xb0 fs/buffer.c:1223
Modules linked in:
CPU: 1 UID: 0 PID: 8074 Comm: syz.1.419 Not tainted 6.13.0-rc5-syzkaller-00163-gab75170520d4 #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+0x6d/0xb0 fs/buffer.c:1223
Code: 84 d2 75 52 44 8b 63 60 31 ff 44 89 e6 e8 fb d5 79 ff 45 85 e4 75 20 e8 b1 d3 79 ff 90 48 c7 c7 e0 24 7f 8b e8 c4 0d 3a ff 90 <0f> 0b 90 90 5b 5d 41 5c e9 96 d3 79 ff e8 91 d3 79 ff be 04 00 00
RSP: 0018:ffffc90000a18f40 EFLAGS: 00010082
RAX: 0000000000000000 RBX: ffff888059529828 RCX: ffffffff815a5139
RDX: ffff888032835a00 RSI: ffffffff815a5146 RDI: 0000000000000001
RBP: ffff888059529888 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffff888059529828 R14: dffffc0000000000 R15: ffffffff82204230
FS:  00007fe67c8db6c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c335bc7 CR3: 00000000699cc000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 brelse include/linux/buffer_head.h:324 [inline]
 __invalidate_bh_lrus fs/buffer.c:1498 [inline]
 invalidate_bh_lru+0xa2/0x190 fs/buffer.c:1511
 csd_do_func kernel/smp.c:134 [inline]
 __flush_smp_call_function_queue+0x27d/0x8c0 kernel/smp.c:540
 __sysvec_call_function_single+0x8c/0x410 arch/x86/kernel/smp.c:271
 instr_sysvec_call_function_single arch/x86/kernel/smp.c:266 [inline]
 sysvec_call_function_single+0x9f/0xc0 arch/x86/kernel/smp.c:266
 </IRQ>
 <TASK>
 asm_sysvec_call_function_single+0x1a/0x20 arch/x86/include/asm/idtentry.h:709
RIP: 0010:__might_sleep+0x4/0x170 kernel/sched/core.c:8675
Code: e8 91 c3 93 00 e9 14 fc ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa <48> b8 00 00 00 00 00 fc ff df 41 54 65 4c 8b 25 38 b5 9b 7e 55 89
RSP: 0018:ffffc900041af6c8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff88806b1995e8 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000232 RDI: ffffffff8b6cc3e0
RBP: ffffc900041af810 R08: ffffffff89d06977 R09: 0000000000000000
R10: ffffc900041af830 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000000002 R14: 0000000000000000 R15: ffffc900041af750
 __mutex_lock_common kernel/locking/mutex.c:562 [inline]
 __mutex_lock+0x108/0xa60 kernel/locking/mutex.c:735
 __unix_dgram_recvmsg+0x267/0xe50 net/unix/af_unix.c:2433
 unix_dgram_recvmsg+0xd0/0x110 net/unix/af_unix.c:2538
 sock_recvmsg_nosec net/socket.c:1033 [inline]
 ____sys_recvmsg+0x5fb/0x6b0 net/socket.c:2801
 ___sys_recvmsg+0x115/0x1a0 net/socket.c:2845
 do_recvmmsg+0x2f8/0x740 net/socket.c:2940
 __sys_recvmmsg net/socket.c:3014 [inline]
 __do_sys_recvmmsg net/socket.c:3037 [inline]
 __se_sys_recvmmsg net/socket.c:3030 [inline]
 __x64_sys_recvmmsg+0x239/0x290 net/socket.c:3030
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe67bb85d29
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007fe67c8db038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007fe67bd76080 RCX: 00007fe67bb85d29
RDX: 0000000000010106 RSI: 00000000200000c0 RDI: 0000000000000008
RBP: 00007fe67bc01b08 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fe67bd76080 R15: 00007ffcfcf0c308
 </TASK>
----------------
Code disassembly (best guess):
   0:	e8 91 c3 93 00       	call   0x93c396
   5:	e9 14 fc ff ff       	jmp    0xfffffc1e
   a:	66 66 2e 0f 1f 84 00 	data16 cs nopw 0x0(%rax,%rax,1)
  11:	00 00 00 00
  15:	90                   	nop
  16:	90                   	nop
  17:	90                   	nop
  18:	90                   	nop
  19:	90                   	nop
  1a:	90                   	nop
  1b:	90                   	nop
  1c:	90                   	nop
  1d:	90                   	nop
  1e:	90                   	nop
  1f:	90                   	nop
  20:	90                   	nop
  21:	90                   	nop
  22:	90                   	nop
  23:	90                   	nop
  24:	90                   	nop
  25:	90                   	nop
  26:	f3 0f 1e fa          	endbr64
* 2a:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax <-- trapping instruction
  31:	fc ff df
  34:	41 54                	push   %r12
  36:	65 4c 8b 25 38 b5 9b 	mov    %gs:0x7e9bb538(%rip),%r12        # 0x7e9bb576
  3d:	7e
  3e:	55                   	push   %rbp
  3f:	89                   	.byte 0x89