loop0: detected capacity change from 0 to 32768
BUG at fs/jfs/jfs_dmap.c:2959 assert(n < 4)
------------[ cut here ]------------
kernel BUG at fs/jfs/jfs_dmap.c:2959!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 5041 Comm: syz-executor201 Not tainted 6.5.0-rc7-next-20230825-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
RIP: 0010:dbFindLeaf+0x14e/0x240 fs/jfs/jfs_dmap.c:2959
Code: fe 83 fb 04 75 8c e8 a1 9a 90 fe 48 c7 c1 40 b5 ca 8a ba 8f 0b 00 00 48 c7 c6 80 b3 ca 8a 48 c7 c7 c0 b3 ca 8a e8 22 b7 73 fe <0f> 0b e8 7b 9a 90 fe 46 8d 34 ad 01 00 00 00 31 ff 83 6c 24 04 01
RSP: 0018:ffffc90003dd7a80 EFLAGS: 00010286
RAX: 000000000000002b RBX: 0000000000000004 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff816b8b92 RDI: 0000000000000005
RBP: ffff888072d52010 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000000 R11: 0000000000000001 R12: 000000000000000a
R13: 0000000000000020 R14: 000000000000001d R15: 00000000ffffffff
FS:  0000555555988380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f147f9f1b10 CR3: 0000000072d56000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 dbAllocDmapLev+0xaa/0x2f0 fs/jfs/jfs_dmap.c:1960
 dbAllocCtl+0x12c/0x7b0 fs/jfs/jfs_dmap.c:1816
 dbAllocAG+0x8c5/0xd20 fs/jfs/jfs_dmap.c:1357
 dbDiscardAG+0x23a/0x790 fs/jfs/jfs_dmap.c:1606
 jfs_ioc_trim+0x406/0x5c0 fs/jfs/jfs_discard.c:100
 jfs_ioctl+0x337/0x430 fs/jfs/ioctl.c:131
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:871 [inline]
 __se_sys_ioctl fs/ioctl.c:857 [inline]
 __x64_sys_ioctl+0x18f/0x210 fs/ioctl.c:857
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f7dd0b596f9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 17 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffce32079d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ffce3207ba8 RCX: 00007f7dd0b596f9
RDX: 0000000020000080 RSI: 00000000c0185879 RDI: 0000000000000004
RBP: 00007f7dd0bd2610 R08: 0000000000000000 R09: 00007ffce3207ba8
R10: 00007f7dd0b94ab3 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffce3207b98 R14: 0000000000000001 R15: 0000000000000001
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:dbFindLeaf+0x14e/0x240 fs/jfs/jfs_dmap.c:2959
Code: fe 83 fb 04 75 8c e8 a1 9a 90 fe 48 c7 c1 40 b5 ca 8a ba 8f 0b 00 00 48 c7 c6 80 b3 ca 8a 48 c7 c7 c0 b3 ca 8a e8 22 b7 73 fe <0f> 0b e8 7b 9a 90 fe 46 8d 34 ad 01 00 00 00 31 ff 83 6c 24 04 01
RSP: 0018:ffffc90003dd7a80 EFLAGS: 00010286
RAX: 000000000000002b RBX: 0000000000000004 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff816b8b92 RDI: 0000000000000005
RBP: ffff888072d52010 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000000 R11: 0000000000000001 R12: 000000000000000a
R13: 0000000000000020 R14: 000000000000001d R15: 00000000ffffffff
FS:  0000555555988380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f147f9f1b10 CR3: 0000000072d56000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400