... Log Wrap ... Log Wrap ... Log Wrap ...
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: 7956 Comm: syz.4.197 Tainted: G             L      syzkaller #0 PREEMPT 
Tainted: [L]=SOFTLOCKUP
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 : ffff80009e0e6c70
x29: ffff80009e0e6c70 x28: ffff0000d09a8008 x27: 0000000000000002
x26: ffff0000d09a880c x25: 0000000000000003 x24: 0000000000000000
x23: ffff80008fe9a410 x22: 0000000000000020 x21: 0000000000000001
x20: 00000000ffffffff x19: 0000000000000000 x18: 1fffe0003377d090
x17: ffff80008f86e000 x16: ffff800082e5c71c x15: 0000000000000001
x14: 1ffff00013c1cd08 x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000080000 x10: 000000000006d354 x9 : bb02cf008022c000
x8 : bb02cf008022c000 x7 : ffff80008049e510 x6 : 0000000000000000
x5 : 0000000000000001 x4 : 0000000000000001 x3 : ffff8000807f0b34
x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000030
Call trace:
 dbFindBits+0x1ac/0x1b0 fs/jfs/jfs_dmap.c:3036 (P)
 dbAllocNear+0x1f4/0x350 fs/jfs/jfs_dmap.c:1243
 dbAlloc+0x72c/0x9dc fs/jfs/jfs_dmap.c:832
 extBalloc fs/jfs/jfs_extent.c:336 [inline]
 extAlloc+0x42c/0xdc8 fs/jfs/jfs_extent.c:127
 jfs_get_block+0x2bc/0x8b8 fs/jfs/inode.c:254
 __block_write_begin_int+0x53c/0x15e8 fs/buffer.c:2145
 block_write_begin+0xa4/0x12c fs/buffer.c:2256
 jfs_write_begin+0x44/0x88 fs/jfs/inode.c:306
 generic_perform_write+0x244/0x7bc mm/filemap.c:4314
 __generic_file_write_iter+0xfc/0x204 mm/filemap.c:4431
 generic_file_write_iter+0x10c/0x47c mm/filemap.c:4457
 iter_file_splice_write+0x770/0xd7c fs/splice.c:738
 do_splice_from fs/splice.c:938 [inline]
 direct_splice_actor+0xec/0x14c fs/splice.c:1161
 splice_direct_to_actor+0x414/0x994 fs/splice.c:1105
 do_splice_direct_actor fs/splice.c:1204 [inline]
 do_splice_direct+0x130/0x210 fs/splice.c:1230
 do_sendfile+0x3cc/0x658 fs/read_write.c:1370
 __do_sys_sendfile64 fs/read_write.c:1431 [inline]
 __se_sys_sendfile64 fs/read_write.c:1417 [inline]
 __arm64_sys_sendfile64+0x1b4/0x274 fs/read_write.c:1417
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x5c/0x26c arch/arm64/kernel/entry-common.c:724
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
Code: d004bc83 91058063 52817b82 979252d5 (d4210000) 
---[ end trace 0000000000000000 ]---