loop2: detected capacity change from 0 to 32768
BUG at fs/jfs/jfs_dmap.c:2983 assert(n < 4)
------------[ cut here ]------------
kernel BUG at fs/jfs/jfs_dmap.c:2983!
Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 6326 Comm: syz.2.337 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : dbFindLeaf+0x484/0x488 fs/jfs/jfs_dmap.c:2983
lr : dbFindLeaf+0x484/0x488 fs/jfs/jfs_dmap.c:2983
sp : ffff800021d971f0
x29: ffff800021d97200 x28: 0000000000000058 x27: 00000000ffffffff
x26: 0000000000000001 x25: 0000000000000055 x24: 0000000000000155
x23: ffff0000d449f021 x22: 0000000000000000 x21: ffff0000d449f010
x20: 0000000000000055 x19: dfff800000000000 x18: ffff800011a5bd40
x17: 1fffe00033ee7b7e x16: ffff8000082d3a08 x15: 0000000040000000
x14: 0000000000000002 x13: 1ffff00002a0a0b1 x12: 0000000000080000
x11: 0000000000011745 x10: ffff800025cca000 x9 : 51274da4e113e700
x8 : 51274da4e113e700 x7 : ffff8000082532dc x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : ffff80000a84818c
x2 : ffff00019f73dd10 x1 : 0000000100000000 x0 : 000000000000002b
Call trace:
 dbFindLeaf+0x484/0x488 fs/jfs/jfs_dmap.c:2983
 dbAllocDmapLev+0x74/0x36c fs/jfs/jfs_dmap.c:1969
 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
 dtSplitUp fs/jfs/jfs_dtree.c:982 [inline]
 dtInsert+0x820/0x55ac fs/jfs/jfs_dtree.c:871
 jfs_mknod+0x374/0x7b0 fs/jfs/namei.c:1408
 vfs_mknod+0x3c4/0x44c fs/namei.c:3993
 unix_bind_bsd net/unix/af_unix.c:1215 [inline]
 unix_bind+0x448/0xbbc net/unix/af_unix.c:1308
 __sys_bind+0x1dc/0x27c net/socket.c:1811
 __do_sys_bind net/socket.c:1822 [inline]
 __se_sys_bind net/socket.c:1820 [inline]
 __arm64_sys_bind+0x7c/0x94 net/socket.c:1820
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
Code: f0042aa3 91280063 528174e2 95fe9bd6 (d4210000) 
---[ end trace 0000000000000000 ]---