BUG at fs/jfs/jfs_dmap.c:3036 assert(bitno < 32)
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kernel BUG at fs/jfs/jfs_dmap.c:3036!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 11712 Comm: syz.5.771 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:dbFindBits+0x19e/0x1a0 fs/jfs/jfs_dmap.c:3036
Code: d6 fd 90 0f 0b e8 e2 7a 73 fe 48 c7 c7 20 9a 8a 8b 48 c7 c6 60 97 8a 8b ba dc 0b 00 00 48 c7 c1 60 a2 8a 8b e8 63 78 d6 fd 90 <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 41 57 41
RSP: 0018:ffffc9000d45f568 EFLAGS: 00010246
RAX: 0000000000000030 RBX: 0000000000000000 RCX: 4494a1dec293d300
RDX: ffffc90004cd9000 RSI: 0000000000001646 RDI: 0000000000001647
RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52001a8be5d R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000020
FS:  00007f3365dee6c0(0000) GS:ffff88812643c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5f5a5c5000 CR3: 0000000061186000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 dbAllocDmapLev+0x16b/0x3c0 fs/jfs/jfs_dmap.c:1985
 dbAllocCtl+0x14a/0x9c0 fs/jfs/jfs_dmap.c:1825
 dbAllocAG+0x1e6/0xff0 fs/jfs/jfs_dmap.c:1353
 dbAlloc+0x5ab/0xba0 fs/jfs/jfs_dmap.c:877
 dtSplitUp fs/jfs/jfs_dtree.c:982 [inline]
 dtInsert+0xb53/0x5f10 fs/jfs/jfs_dtree.c:871
 jfs_link+0x370/0x610 fs/jfs/namei.c:827
 vfs_link+0x518/0x6e0 fs/namei.c:5746
 filename_linkat+0x273/0x600 fs/namei.c:5814
 __do_sys_link fs/namei.c:5847 [inline]
 __se_sys_link+0x55/0x2c0 fs/namei.c:5843
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3367b9c799
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:00007f3365dee028 EFLAGS: 00000246 ORIG_RAX: 0000000000000056
RAX: ffffffffffffffda RBX: 00007f3367e15fa0 RCX: 00007f3367b9c799
RDX: 0000000000000000 RSI: 0000200000000240 RDI: 0000200000000940
RBP: 00007f3367c32c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3367e16038 R14: 00007f3367e15fa0 R15: 00007ffdfc132cb8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:dbFindBits+0x19e/0x1a0 fs/jfs/jfs_dmap.c:3036
Code: d6 fd 90 0f 0b e8 e2 7a 73 fe 48 c7 c7 20 9a 8a 8b 48 c7 c6 60 97 8a 8b ba dc 0b 00 00 48 c7 c1 60 a2 8a 8b e8 63 78 d6 fd 90 <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 41 57 41
RSP: 0018:ffffc9000d45f568 EFLAGS: 00010246
RAX: 0000000000000030 RBX: 0000000000000000 RCX: 4494a1dec293d300
RDX: ffffc90004cd9000 RSI: 0000000000001646 RDI: 0000000000001647
RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52001a8be5d R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000020
FS:  00007f3365dee6c0(0000) GS:ffff88812643c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5f5a5c5000 CR3: 0000000061186000 CR4: 00000000003526f0