loop0: detected capacity change from 0 to 32768
BUG at fs/jfs/jfs_dmap.c:3017 assert(n < 4)
------------[ cut here ]------------
kernel BUG at fs/jfs/jfs_dmap.c:3017!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 3498 Comm: syz-executor205 Not tainted 5.15.120-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023
RIP: 0010:dbFindLeaf+0x41f/0x430 fs/jfs/jfs_dmap.c:3017
Code: 67 55 e9 fe eb 89 e8 20 e7 9f fe 48 c7 c7 e0 a7 c0 8a 48 c7 c6 20 a5 c0 8a ba c9 0b 00 00 48 c7 c1 a0 b2 c0 8a e8 1a 69 3a 07 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 41 57 41 56
RSP: 0018:ffffc90002bcf998 EFLAGS: 00010246
RAX: 000000000000002b RBX: 0000000000000020 RCX: f7cd6b31cc43ed00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 00000000ffffffff R08: ffffffff8166491c R09: ffffed10173667a0
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88807e06d010
R13: 000000000000000a R14: ffff88807e06d041 R15: 000000000000001d
FS:  000055555617f380(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffafe7a3000 CR3: 000000007481b000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 dbAllocDmapLev+0xca/0x430 fs/jfs/jfs_dmap.c:2021
 dbAllocCtl+0x113/0x920 fs/jfs/jfs_dmap.c:1877
 dbAllocAG+0x28b/0x10b0 fs/jfs/jfs_dmap.c:1418
 dbDiscardAG+0x34e/0xa10 fs/jfs/jfs_dmap.c:1667
 jfs_ioc_trim+0x42f/0x660 fs/jfs/jfs_discard.c:100
 jfs_ioctl+0x2ac/0x3a0 fs/jfs/ioctl.c:132
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7ffb05be16f9
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:00007ffc57532398 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ffc57532568 RCX: 00007ffb05be16f9
RDX: 0000000020000080 RSI: 00000000c0185879 RDI: 0000000000000004
RBP: 00007ffb05c5a610 R08: 0000000000000000 R09: 00007ffc57532568
R10: 00007ffb05c1cab3 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffc57532558 R14: 0000000000000001 R15: 0000000000000001
 </TASK>
Modules linked in:
---[ end trace 034eebe48ea995d7 ]---
RIP: 0010:dbFindLeaf+0x41f/0x430 fs/jfs/jfs_dmap.c:3017
Code: 67 55 e9 fe eb 89 e8 20 e7 9f fe 48 c7 c7 e0 a7 c0 8a 48 c7 c6 20 a5 c0 8a ba c9 0b 00 00 48 c7 c1 a0 b2 c0 8a e8 1a 69 3a 07 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 41 57 41 56
RSP: 0018:ffffc90002bcf998 EFLAGS: 00010246
RAX: 000000000000002b RBX: 0000000000000020 RCX: f7cd6b31cc43ed00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 00000000ffffffff R08: ffffffff8166491c R09: ffffed10173667a0
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88807e06d010
R13: 000000000000000a R14: ffff88807e06d041 R15: 000000000000001d
FS:  000055555617f380(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055ff9f081bc0 CR3: 000000007481b000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400