BUG at fs/jfs/jfs_dmap.c:3036 assert(bitno < 32)
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kernel BUG at fs/jfs/jfs_dmap.c:3036!
Internal error: Oops - BUG: 00000000f2000800 [#1]  SMP
Modules linked in:
CPU: 0 UID: 0 PID: 6940 Comm: syz.0.39 Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : dbFindBits+0x1ac/0x1b0 fs/jfs/jfs_dmap.c:3036
lr : dbFindBits+0x1ac/0x1b0 fs/jfs/jfs_dmap.c:3036
sp : ffff8000a6196960
x29: ffff8000a6196960 x28: 0000000000000000 x27: dfff800000000000
x26: ffff0000df575804 x25: ffff0000df575021 x24: 0000000000000000
x23: ffff80008fb9d130 x22: 0000000000000020 x21: 0000000000000001
x20: 00000000ffffffff x19: 0000000000000000 x18: 1fffe000337db690
x17: ffff80008f57e000 x16: ffff800082deb6c0 x15: 0000000000000001
x14: 1ffff00014c32ca8 x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000080000 x10: 000000000007ffff x9 : 242a669ef6684900
x8 : 242a669ef6684900 x7 : ffff800080492744 x6 : 0000000000000000
x5 : 0000000000000001 x4 : 0000000000000001 x3 : ffff8000807d6130
x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000030
Call trace:
 dbFindBits+0x1ac/0x1b0 fs/jfs/jfs_dmap.c:3036 (P)
 dbAllocDmapLev+0x13c/0x36c fs/jfs/jfs_dmap.c:1985
 dbAllocCtl+0x130/0x8e0 fs/jfs/jfs_dmap.c:1825
 dbAllocAG+0x1c0/0xdc0 fs/jfs/jfs_dmap.c:1353
 dbAlloc+0x428/0x9dc fs/jfs/jfs_dmap.c:877
 xtSplitUp+0x380/0x1914 fs/jfs/jfs_xtree.c:760
 xtInsert+0x304/0xb4c fs/jfs/jfs_xtree.c:608
 extAlloc+0x8c0/0xdc8 fs/jfs/jfs_extent.c:150
 jfs_get_block+0x2bc/0x8b8 fs/jfs/inode.c:254
 get_more_blocks fs/direct-io.c:648 [inline]
 do_direct_IO fs/direct-io.c:936 [inline]
 __blockdev_direct_IO+0x10bc/0x2818 fs/direct-io.c:1243
 blockdev_direct_IO include/linux/fs.h:3509 [inline]
 jfs_direct_IO+0xf0/0x1d0 fs/jfs/inode.c:339
 generic_file_direct_write+0x1a8/0x350 mm/filemap.c:4176
 __generic_file_write_iter+0x10c/0x204 mm/filemap.c:4345
 generic_file_write_iter+0x10c/0x47c mm/filemap.c:4385
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x540/0xa3c fs/read_write.c:686
 ksys_write+0x120/0x210 fs/read_write.c:738
 __do_sys_write fs/read_write.c:749 [inline]
 __se_sys_write fs/read_write.c:746 [inline]
 __arm64_sys_write+0x7c/0x90 fs/read_write.c:746
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:746
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:765
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
Code: 9004b1c3 91268063 52817b82 97939be7 (d4210000) 
---[ end trace 0000000000000000 ]---