BUG at fs/jfs/jfs_dmap.c:3096 assert(bitno < 32)
------------[ cut here ]------------
kernel BUG at fs/jfs/jfs_dmap.c:3096!
Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 4254 Comm: syz.0.23 Not tainted 5.15.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : dbFindBits+0x1ac/0x1b0 fs/jfs/jfs_dmap.c:3096
lr : dbFindBits+0x1ac/0x1b0 fs/jfs/jfs_dmap.c:3096
sp : ffff80001f687210
x29: ffff80001f687210 x28: ffff0000d27e9008 x27: 0000000000000000
x26: ffff0000d27e9804 x25: 0000000000000001 x24: 0000000000000000
x23: ffff8000146d5aa0 x22: 0000000000000020 x21: 0000000000000001
x20: 00000000ffffffff x19: 0000000000000000 x18: 0000000000000001
x17: 0000000000000000 x16: ffff8000083020fc x15: 00000000ffffffff
x14: 0000000000ff0100 x13: 0000000000000001 x12: 0000000000ff0100
x11: 0000000000000000 x10: 0000000000000000 x9 : a261da4e37f58d00
x8 : a261da4e37f58d00 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff80001f686af8 x4 : ffff80001424f400 x3 : ffff80000830220c
x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000030
Call trace:
 dbFindBits+0x1ac/0x1b0 fs/jfs/jfs_dmap.c:3096
 dbAllocNear+0x1f4/0x350 fs/jfs/jfs_dmap.c:1311
 dbAlloc+0x760/0x978 fs/jfs/jfs_dmap.c:832
 extBalloc fs/jfs/jfs_extent.c:523 [inline]
 extAlloc+0x3f4/0xdc4 fs/jfs/jfs_extent.c:125
 jfs_get_block+0x2bc/0x8ec fs/jfs/inode.c:258
 nobh_write_begin+0x2d8/0x9d4 fs/buffer.c:2650
 jfs_write_begin+0x58/0xa0 fs/jfs/inode.c:322
 generic_perform_write+0x204/0x480 mm/filemap.c:3785
 __generic_file_write_iter+0x23c/0x454 mm/filemap.c:3912
 generic_file_write_iter+0xb0/0x1b4 mm/filemap.c:3944
 do_iter_readv_writev+0x3a0/0x4f8 fs/read_write.c:-1
 do_iter_write+0x1c4/0x670 fs/read_write.c:855
 vfs_writev fs/read_write.c:928 [inline]
 do_pwritev+0x1c8/0x2fc fs/read_write.c:1025
 __do_sys_pwritev2 fs/read_write.c:1084 [inline]
 __se_sys_pwritev2 fs/read_write.c:1075 [inline]
 __arm64_sys_pwritev2+0xd4/0x108 fs/read_write.c:1075
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
Code: 9003f643 91318063 52818302 95e55bdb (d4210000) 
---[ end trace 59c5d05eb1626cd1 ]---