loop2: detected capacity change from 0 to 32768
divide error: 0000 [#1] SMP NOPTI
CPU: 0 PID: 5961 Comm: syz.2.15 Not tainted 5.13.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:dbAllocAG+0x196/0x5b0 fs/jfs/jfs_dmap.c:1429
Code: c4 03 00 00 e8 db 6c a1 ff 48 8b 74 24 08 b9 0a 00 00 00 31 ff 44 8b 76 28 8b 5e 2c 43 8d 04 36 29 c1 b8 01 00 00 00 d3 e0 99 <f7> fb 83 e8 01 44 21 f8 0f af c3 03 46 30 89 de 89 44 24 14 e8 61
RSP: 0018:ffffc9000040bd58 EFLAGS: 00010216
RAX: 0000000000000400 RBX: 0000000000000000 RCX: 000000000000000a
RDX: 0000000000000000 RSI: ffff888124a1d000 RDI: 0000000000000000
RBP: 0000000000000003 R08: 0000000000000155 R09: 0000000000000000
R10: ffffffff8183cc44 R11: 0000000000000000 R12: 000000000000000c
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007fd603dee6c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d35ffff CR3: 0000000119b18000 CR4: 0000000000350ef0
Call Trace:
 dbDiscardAG+0x178/0x440 fs/jfs/jfs_dmap.c:1643
 jfs_ioc_trim+0x13e/0x1b0 fs/jfs/jfs_discard.c:100
 jfs_ioctl+0x14f/0x1b0 fs/jfs/ioctl.c:132
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:1069 [inline]
 __se_sys_ioctl fs/ioctl.c:1055 [inline]
 __x64_sys_ioctl+0xff/0x140 fs/ioctl.c:1055
 do_syscall_64+0x41/0x80 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fd60436f809
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:00007fd603dee058 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fd604534fa0 RCX: 00007fd60436f809
RDX: 0000000020000080 RSI: 00000000c0185879 RDI: 0000000000000004
RBP: 00007fd6043e293e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fd604534fa0 R15: 00007ffe1cb72c28
Modules linked in:
---[ end trace c5aedab60a913f12 ]---
RIP: 0010:dbAllocAG+0x196/0x5b0 fs/jfs/jfs_dmap.c:1429
Code: c4 03 00 00 e8 db 6c a1 ff 48 8b 74 24 08 b9 0a 00 00 00 31 ff 44 8b 76 28 8b 5e 2c 43 8d 04 36 29 c1 b8 01 00 00 00 d3 e0 99 <f7> fb 83 e8 01 44 21 f8 0f af c3 03 46 30 89 de 89 44 24 14 e8 61
RSP: 0018:ffffc9000040bd58 EFLAGS: 00010216
RAX: 0000000000000400 RBX: 0000000000000000 RCX: 000000000000000a
RDX: 0000000000000000 RSI: ffff888124a1d000 RDI: 0000000000000000
RBP: 0000000000000003 R08: 0000000000000155 R09: 0000000000000000
R10: ffffffff8183cc44 R11: 0000000000000000 R12: 000000000000000c
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007fd603dee6c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d35ffff CR3: 0000000119b18000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	03 00                	add    (%rax),%eax
   2:	00 e8                	add    %ch,%al
   4:	db 6c a1 ff          	fldt   -0x1(%rcx,%riz,4)
   8:	48 8b 74 24 08       	mov    0x8(%rsp),%rsi
   d:	b9 0a 00 00 00       	mov    $0xa,%ecx
  12:	31 ff                	xor    %edi,%edi
  14:	44 8b 76 28          	mov    0x28(%rsi),%r14d
  18:	8b 5e 2c             	mov    0x2c(%rsi),%ebx
  1b:	43 8d 04 36          	lea    (%r14,%r14,1),%eax
  1f:	29 c1                	sub    %eax,%ecx
  21:	b8 01 00 00 00       	mov    $0x1,%eax
  26:	d3 e0                	shl    %cl,%eax
  28:	99                   	cltd
* 29:	f7 fb                	idiv   %ebx <-- trapping instruction
  2b:	83 e8 01             	sub    $0x1,%eax
  2e:	44 21 f8             	and    %r15d,%eax
  31:	0f af c3             	imul   %ebx,%eax
  34:	03 46 30             	add    0x30(%rsi),%eax
  37:	89 de                	mov    %ebx,%esi
  39:	89 44 24 14          	mov    %eax,0x14(%rsp)
  3d:	e8                   	.byte 0xe8
  3e:	61                   	(bad)