BUG at fs/jfs/jfs_dmap.c:3108 assert(nb <= DBWORD)
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kernel BUG at fs/jfs/jfs_dmap.c:3108!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 18713 Comm: syz.0.968 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:dbFindBits+0x177/0x1a0 fs/jfs/jfs_dmap.c:3108
Code: e9 20 ff ff ff e8 69 24 62 fe 48 c7 c7 e0 19 ad 8b 48 c7 c6 20 17 ad 8b ba 24 0c 00 00 48 c7 c1 00 22 ad 8b e8 2a 10 c3 fd 90 <0f> 0b e8 42 24 62 fe 48 c7 c7 e0 19 ad 8b 48 c7 c6 20 17 ad 8b ba
RSP: 0018:ffffc90004547ad0 EFLAGS: 00010246
RAX: 0000000000000032 RBX: 000000000000000a RCX: f430b9bd14886300
RDX: ffffc900076db000 RSI: 0000000000001126 RDI: 0000000000001127
RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff520008a8f09 R12: 0000000000000000
R13: 000000000000000a R14: 0000000000000400 R15: ffff888069477000
FS:  00007f582e3966c0(0000) GS:ffff888125cd4000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000557793218950 CR3: 0000000040914000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 dbAllocDmapLev+0x161/0x3b0 fs/jfs/jfs_dmap.c:2072
 dbAllocCtl+0x145/0x990 fs/jfs/jfs_dmap.c:1912
 dbAllocAG+0x1f4/0xf80 fs/jfs/jfs_dmap.c:1440
 dbDiscardAG+0x2d6/0x8f0 fs/jfs/jfs_dmap.c:1695
 jfs_ioc_trim+0x436/0x680 fs/jfs/jfs_discard.c:106
 jfs_ioctl+0x291/0x3b0 fs/jfs/ioctl.c:131
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl+0xff/0x170 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f583013e159
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:00007f582e396028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f58303c5fa0 RCX: 00007f583013e159
RDX: 0000200000000100 RSI: 00000000c0185879 RDI: 0000000000000007
RBP: 00007f58301d5024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f58303c6038 R14: 00007f58303c5fa0 R15: 00007ffdfd744b48
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:dbFindBits+0x177/0x1a0 fs/jfs/jfs_dmap.c:3108
Code: e9 20 ff ff ff e8 69 24 62 fe 48 c7 c7 e0 19 ad 8b 48 c7 c6 20 17 ad 8b ba 24 0c 00 00 48 c7 c1 00 22 ad 8b e8 2a 10 c3 fd 90 <0f> 0b e8 42 24 62 fe 48 c7 c7 e0 19 ad 8b 48 c7 c6 20 17 ad 8b ba
RSP: 0018:ffffc90004547ad0 EFLAGS: 00010246
RAX: 0000000000000032 RBX: 000000000000000a RCX: f430b9bd14886300
RDX: ffffc900076db000 RSI: 0000000000001126 RDI: 0000000000001127
RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff520008a8f09 R12: 0000000000000000
R13: 000000000000000a R14: 0000000000000400 R15: ffff888069477000
FS:  00007f582e3966c0(0000) GS:ffff888125cd4000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff200155000 CR3: 0000000040914000 CR4: 00000000003526f0