loop0: detected capacity change from 0 to 32768
BUG at fs/jfs/jfs_dmap.c:2972 assert(n < 4)
------------[ cut here ]------------
kernel BUG at fs/jfs/jfs_dmap.c:2972!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 5061 Comm: syz-executor243 Not tainted 6.6.0-syzkaller-14500-g1c41041124bd #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
RIP: 0010:dbFindLeaf+0x4de/0x4e0 fs/jfs/jfs_dmap.c:2972
Code: fe e9 55 ff ff ff e8 91 83 7b fe 48 c7 c7 a0 3b a2 8b 48 c7 c6 e0 38 a2 8b ba 9c 0b 00 00 48 c7 c1 60 46 a2 8b e8 c2 52 00 08 <0f> 0b 55 41 57 41 56 41 55 41 54 53 48 83 ec 68 48 89 fb 49 be 00
RSP: 0018:ffffc90003a4f978 EFLAGS: 00010246
RAX: 000000000000002b RBX: 00000000ffffffff RCX: 8c59ad7d79a32500
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 000000000000001d R08: ffffffff8171771c R09: 1ffff92000749ed0
R10: dffffc0000000000 R11: fffff52000749ed1 R12: 0000000000000155
R13: 0000000000000002 R14: 0000000000000020 R15: 000000000000000a
FS:  0000555555b08380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffead86e000 CR3: 00000000771f6000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 dbAllocDmapLev+0xd3/0x490 fs/jfs/jfs_dmap.c:1967
 dbAllocCtl+0x113/0x920 fs/jfs/jfs_dmap.c:1823
 dbAllocAG+0x28f/0x10b0 fs/jfs/jfs_dmap.c:1364
 dbDiscardAG+0x352/0xa10 fs/jfs/jfs_dmap.c:1613
 jfs_ioc_trim+0x433/0x660 fs/jfs/jfs_discard.c:100
 jfs_ioctl+0x2d0/0x3e0 fs/jfs/ioctl.c:131
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:871 [inline]
 __se_sys_ioctl+0xf8/0x170 fs/ioctl.c:857
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f5d853fd6f9
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:00007ffead86db68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ffead86dd38 RCX: 00007f5d853fd6f9
RDX: 0000000020000080 RSI: 00000000c0185879 RDI: 0000000000000004
RBP: 00007f5d85476610 R08: 0000000000000000 R09: 00007ffead86dd38
R10: 00007f5d85438ab3 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffead86dd28 R14: 0000000000000001 R15: 0000000000000001
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:dbFindLeaf+0x4de/0x4e0 fs/jfs/jfs_dmap.c:2972
Code: fe e9 55 ff ff ff e8 91 83 7b fe 48 c7 c7 a0 3b a2 8b 48 c7 c6 e0 38 a2 8b ba 9c 0b 00 00 48 c7 c1 60 46 a2 8b e8 c2 52 00 08 <0f> 0b 55 41 57 41 56 41 55 41 54 53 48 83 ec 68 48 89 fb 49 be 00
RSP: 0018:ffffc90003a4f978 EFLAGS: 00010246
RAX: 000000000000002b RBX: 00000000ffffffff RCX: 8c59ad7d79a32500
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 000000000000001d R08: ffffffff8171771c R09: 1ffff92000749ed0
R10: dffffc0000000000 R11: fffff52000749ed1 R12: 0000000000000155
R13: 0000000000000002 R14: 0000000000000020 R15: 000000000000000a
FS:  0000555555b08380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffead86e000 CR3: 00000000771f6000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400