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: 17605 Comm: syz.7.2823 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:dbFindBits+0x19e/0x1a0
Code: e3 fd 90 0f 0b e8 32 00 7c fe 48 c7 c7 c0 6d a4 8b 48 c7 c6 00 6b a4 8b ba dc 0b 00 00 48 c7 c1 a0 75 a4 8b e8 c3 8d e3 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:ffffc900072fe9c8 EFLAGS: 00010246
RAX: 0000000000000030 RBX: 0000000000000000 RCX: b10e9f4995517300
RDX: ffffc9002bad4000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: 00000000ffffffff R08: ffffc900072fe6e7 R09: 1ffff92000e5fcdc
R10: dffffc0000000000 R11: fffff52000e5fcdd R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000020
FS:  00007f2a544266c0(0000) GS:ffff8882a9f3b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056442aa8e000 CR3: 0000000172738000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 dbAllocDmapLev+0x16b/0x3c0
 dbAllocCtl+0x14a/0x9c0
 dbAllocAG+0x1e6/0xff0
 dbAlloc+0x5a8/0xba0
 xtSplitUp+0x4b0/0x1f40
 xtInsert+0x415/0xe30
 extAlloc+0xa9a/0xfb0
 jfs_get_block+0x346/0xab0
 __blockdev_direct_IO+0x16ff/0x3490
 jfs_direct_IO+0x119/0x220
 generic_file_direct_write+0x1db/0x3e0
 __generic_file_write_iter+0x11d/0x230
 generic_file_write_iter+0x117/0x550
 do_iter_readv_writev+0x623/0x8c0
 vfs_writev+0x31a/0x960
 __se_sys_pwritev2+0x179/0x290
 do_syscall_64+0xfa/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2a5358f6c9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2a54426038 EFLAGS: 00000246 ORIG_RAX: 0000000000000148
RAX: ffffffffffffffda RBX: 00007f2a537e6090 RCX: 00007f2a5358f6c9
RDX: 0000000000000001 RSI: 0000200000000240 RDI: 0000000000000004
RBP: 00007f2a53611f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000007800 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2a537e6128 R14: 00007f2a537e6090 R15: 00007ffe72a5a9b8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:dbFindBits+0x19e/0x1a0
Code: e3 fd 90 0f 0b e8 32 00 7c fe 48 c7 c7 c0 6d a4 8b 48 c7 c6 00 6b a4 8b ba dc 0b 00 00 48 c7 c1 a0 75 a4 8b e8 c3 8d e3 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:ffffc900072fe9c8 EFLAGS: 00010246
RAX: 0000000000000030 RBX: 0000000000000000 RCX: b10e9f4995517300
RDX: ffffc9002bad4000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: 00000000ffffffff R08: ffffc900072fe6e7 R09: 1ffff92000e5fcdc
R10: dffffc0000000000 R11: fffff52000e5fcdd R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000020
FS:  00007f2a544266c0(0000) GS:ffff88818eb3b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000557922f84668 CR3: 0000000172738000 CR4: 00000000000006f0
