BUG at fs/jfs/jfs_dmap.c:3089 assert(nb <= DBWORD)
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kernel BUG at fs/jfs/jfs_dmap.c:3089!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 10485 Comm: syz.3.1155 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
RIP: 0010:dbFindBits+0x16d/0x1a0 fs/jfs/jfs_dmap.c:3089
Code: 01 e9 29 ff ff ff e8 92 e4 a9 fe 48 c7 c7 00 29 62 8a 48 c7 c6 80 26 62 8a ba 11 0c 00 00 48 c7 c1 00 31 62 8a e8 03 34 e2 06 <0f> 0b e8 6c e4 a9 fe 48 c7 c7 00 29 62 8a 48 c7 c6 80 26 62 8a ba
RSP: 0018:ffffc90002fefae0 EFLAGS: 00010246
RAX: 0000000000000032 RBX: 000000000000000a RCX: 6ad77a0b2e37d700
RDX: ffffc90003071000 RSI: 000000000000bd2b RDI: 000000000000bd2c
RBP: 00000000ffffffff R08: ffff8880b9033d7f R09: 1ffff110172067af
R10: dffffc0000000000 R11: ffffed10172067b0 R12: 0000000000000000
R13: 000000000000000a R14: 0000000000000400 R15: ffff888078f47000
FS:  00007f74238b86c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000559fcf137950 CR3: 0000000061839000 CR4: 00000000003506e0
DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000083
DR3: ffffffffefffff15 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 dbAllocDmapLev+0x169/0x3c0 fs/jfs/jfs_dmap.c:2053
 dbAllocCtl+0x148/0x9b0 fs/jfs/jfs_dmap.c:1893
 dbAllocAG+0x1e7/0xfe0 fs/jfs/jfs_dmap.c:1421
 dbDiscardAG+0x2c5/0x8e0 fs/jfs/jfs_dmap.c:1676
 jfs_ioc_trim+0x41e/0x680 fs/jfs/jfs_discard.c:106
 jfs_ioctl+0x2b6/0x3c0 fs/jfs/ioctl.c:132
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f742565df79
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f74238b8028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f74258d7fa0 RCX: 00007f742565df79
RDX: 0000200000000100 RSI: 00000000c0185879 RDI: 000000000000000c
RBP: 00007f74256f47e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f74258d8038 R14: 00007f74258d7fa0 R15: 00007fff5e957b28
 </TASK>
Modules linked in:
---[ end trace 9d627eaa91e7d466 ]---
RIP: 0010:dbFindBits+0x16d/0x1a0 fs/jfs/jfs_dmap.c:3089
Code: 01 e9 29 ff ff ff e8 92 e4 a9 fe 48 c7 c7 00 29 62 8a 48 c7 c6 80 26 62 8a ba 11 0c 00 00 48 c7 c1 00 31 62 8a e8 03 34 e2 06 <0f> 0b e8 6c e4 a9 fe 48 c7 c7 00 29 62 8a 48 c7 c6 80 26 62 8a ba
RSP: 0018:ffffc90002fefae0 EFLAGS: 00010246
RAX: 0000000000000032 RBX: 000000000000000a RCX: 6ad77a0b2e37d700
RDX: ffffc90003071000 RSI: 000000000000bd2b RDI: 000000000000bd2c
RBP: 00000000ffffffff R08: ffff8880b9033d7f R09: 1ffff110172067af
R10: dffffc0000000000 R11: ffffed10172067b0 R12: 0000000000000000
R13: 000000000000000a R14: 0000000000000400 R15: ffff888078f47000
FS:  00007f74238b86c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc1a283b3bc CR3: 0000000061839000 CR4: 00000000003506e0
DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000083
DR3: ffffffffefffff15 DR6: 00000000fffe0ff0 DR7: 0000000000000400