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: 12344 Comm: syz.7.1620 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: e9 fd 90 0f 0b e8 e2 15 81 fe 48 c7 c7 80 dd c3 8b 48 c7 c6 c0 da c3 8b ba dc 0b 00 00 48 c7 c1 60 e5 c3 8b e8 53 07 e9 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:ffffc90003bfe1e8 EFLAGS: 00010246
RAX: 0000000000000030 RBX: 0000000000000000 RCX: bf39a287e74e7d00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 00000000ffffffff R08: ffffc90003bfdf07 R09: 1ffff9200077fbe0
R10: dffffc0000000000 R11: fffff5200077fbe1 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000020
FS:  0000000000000000(0000) GS:ffff8881a3c18000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd8184af6f CR3: 0000000025402000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 dbAllocDmapLev+0x16b/0x3c0
 dbAllocCtl+0x14a/0x9c0
 dbAllocAG+0x1e6/0xff0
 dbAlloc+0x5a8/0xba0
 extAlloc+0x54a/0xfb0
 jfs_get_block+0x346/0xab0
 __block_write_begin_int+0x6b5/0x1900
 block_write_begin+0x8a/0x120
 jfs_write_begin+0x35/0x80
 generic_perform_write+0x2c5/0x900
 generic_file_write_iter+0x117/0x550
 __kernel_write_iter+0x428/0x910
 dump_user_range+0x8a0/0xc90
 elf_core_dump+0x337b/0x3990
 coredump_write+0x1169/0x1900
 vfs_coredump+0x1daa/0x2a50
 get_signal+0x1109/0x1340
 arch_do_signal_or_restart+0x9a/0x750
 irqentry_exit_to_user_mode+0x81/0x120
 exc_page_fault+0x9f/0xf0
 asm_exc_page_fault+0x26/0x30
RIP: 0033:0x7f825c38ebe9
Code: Unable to access opcode bytes at 0x7f825c38ebbf.
RSP: 002b:00007f825d12bfe8 EFLAGS: 00010206
RAX: 0000000000000000 RBX: 00007f825c5c6090 RCX: 00007f825c38ebe9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001a2400
RBP: 00007f825c411e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f825c5c6128 R14: 00007f825c5c6090 R15: 00007ffd818490e8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:dbFindBits+0x19e/0x1a0
Code: e9 fd 90 0f 0b e8 e2 15 81 fe 48 c7 c7 80 dd c3 8b 48 c7 c6 c0 da c3 8b ba dc 0b 00 00 48 c7 c1 60 e5 c3 8b e8 53 07 e9 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:ffffc90003bfe1e8 EFLAGS: 00010246
RAX: 0000000000000030 RBX: 0000000000000000 RCX: bf39a287e74e7d00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 00000000ffffffff R08: ffffc90003bfdf07 R09: 1ffff9200077fbe0
R10: dffffc0000000000 R11: fffff5200077fbe1 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000020
FS:  0000000000000000(0000) GS:ffff8881a3c18000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f825c38ebbf CR3: 0000000025402000 CR4: 00000000000006f0
