loop0: detected capacity change from 0 to 32768
BUG at fs/jfs/jfs_dmap.c:3009 assert(nb <= DBWORD)
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kernel BUG at fs/jfs/jfs_dmap.c:3009!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 5820 Comm: syz-executor466 Not tainted 6.15.0-rc4-syzkaller-00256-g95d3481af6dc #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
RIP: 0010:dbFindBits+0x177/0x1a0 fs/jfs/jfs_dmap.c:3009
Code: e9 20 ff ff ff e8 79 44 88 fe 48 c7 c7 80 50 a3 8b 48 c7 c6 c0 4d a3 8b ba c1 0b 00 00 48 c7 c1 40 58 a3 8b e8 da 11 f0 fd 90 <0f> 0b e8 52 44 88 fe 48 c7 c7 80 50 a3 8b 48 c7 c6 c0 4d a3 8b ba
RSP: 0018:ffffc900040afac8 EFLAGS: 00010246
RAX: 0000000000000032 RBX: 000000000000000a RCX: 820067d5201a6600
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 00000000ffffffff R08: ffffc900040af7a7 R09: 1ffff92000815ef4
R10: dffffc0000000000 R11: fffff52000815ef5 R12: 0000000000000000
R13: 000000000000000a R14: 0000000000000400 R15: ffff888142f3b000
FS:  0000555575641380(0000) GS:ffff888126200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055991f3f05b0 CR3: 0000000079934000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 dbAllocDmapLev+0x16b/0x3c0 fs/jfs/jfs_dmap.c:1973
 dbAllocCtl+0x14a/0x9b0 fs/jfs/jfs_dmap.c:1813
 dbAllocAG+0x1e8/0xf10 fs/jfs/jfs_dmap.c:1349
 dbDiscardAG+0x2df/0x900 fs/jfs/jfs_dmap.c:1598
 jfs_ioc_trim+0x436/0x670 fs/jfs/jfs_discard.c:105
 jfs_ioctl+0x2b5/0x3d0 fs/jfs/ioctl.c:131
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:906 [inline]
 __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:892
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2c4fc116b9
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:00007ffc7dee5dd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ffc7dee5fa8 RCX: 00007f2c4fc116b9
RDX: 0000200000000080 RSI: 00000000c0185879 RDI: 0000000000000004
RBP: 00007f2c4fc8a610 R08: 0000000000000000 R09: 00007ffc7dee5fa8
R10: 000000000000612f R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffc7dee5f98 R14: 0000000000000001 R15: 0000000000000001
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:dbFindBits+0x177/0x1a0 fs/jfs/jfs_dmap.c:3009
Code: e9 20 ff ff ff e8 79 44 88 fe 48 c7 c7 80 50 a3 8b 48 c7 c6 c0 4d a3 8b ba c1 0b 00 00 48 c7 c1 40 58 a3 8b e8 da 11 f0 fd 90 <0f> 0b e8 52 44 88 fe 48 c7 c7 80 50 a3 8b 48 c7 c6 c0 4d a3 8b ba
RSP: 0018:ffffc900040afac8 EFLAGS: 00010246
RAX: 0000000000000032 RBX: 000000000000000a RCX: 820067d5201a6600
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 00000000ffffffff R08: ffffc900040af7a7 R09: 1ffff92000815ef4
R10: dffffc0000000000 R11: fffff52000815ef5 R12: 0000000000000000
R13: 000000000000000a R14: 0000000000000400 R15: ffff888142f3b000
FS:  0000555575641380(0000) GS:ffff888126100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000066c7e0 CR3: 0000000079934000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400