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: 7951 Comm: syz.3.217 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026
RIP: 0010:dbFindBits+0x19e/0x1a0 fs/jfs/jfs_dmap.c:3036
Code: dd fd 90 0f 0b e8 02 4b 79 fe 48 c7 c7 e0 1e 6a 8b 48 c7 c6 20 1c 6a 8b ba dc 0b 00 00 48 c7 c1 20 27 6a 8b e8 63 70 dd 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:ffffc90003cf7568 EFLAGS: 00010246
RAX: 0000000000000030 RBX: 0000000000000000 RCX: 1cdb7fa36af07900
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff5200079ee5d R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000020
FS:  00007fba110846c0(0000) GS:ffff8881266c9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff086284000 CR3: 000000003acae000 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:826
 vfs_link+0x7c5/0xa00 fs/namei.c:5655
 do_linkat+0x266/0x5b0 fs/namei.c:5725
 __do_sys_link fs/namei.c:5759 [inline]
 __se_sys_link fs/namei.c:5757 [inline]
 __x64_sys_link+0x82/0x90 fs/namei.c:5757
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fba1b26aeb9
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:00007fba11084028 EFLAGS: 00000246 ORIG_RAX: 0000000000000056
RAX: ffffffffffffffda RBX: 00007fba1b4e6180 RCX: 00007fba1b26aeb9
RDX: 0000000000000000 RSI: 0000200000000240 RDI: 0000200000000940
RBP: 00007fba1b2d8c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fba1b4e6218 R14: 00007fba1b4e6180 R15: 00007fff011f17d8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:dbFindBits+0x19e/0x1a0 fs/jfs/jfs_dmap.c:3036
Code: dd fd 90 0f 0b e8 02 4b 79 fe 48 c7 c7 e0 1e 6a 8b 48 c7 c6 20 1c 6a 8b ba dc 0b 00 00 48 c7 c1 20 27 6a 8b e8 63 70 dd 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:ffffc90003cf7568 EFLAGS: 00010246
RAX: 0000000000000030 RBX: 0000000000000000 RCX: 1cdb7fa36af07900
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff5200079ee5d R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000020
FS:  00007fba110846c0(0000) GS:ffff8881266c9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff086284000 CR3: 000000003acae000 CR4: 00000000003526f0