ERROR: (device loop0): remounting filesystem as read-only
ialloc: diAlloc returned -5!
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]  SMP
Modules linked in:
CPU: 0 UID: 0 PID: 7945 Comm: syz.0.206 Not tainted 6.17.0-rc1-syzkaller-g8f5ae30d69d7 #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
pstate: 63400005 (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 : ffff80009dd67860
x29: ffff80009dd67870 x28: 0000000000000078 x27: 0000000000000000
x26: 0000000000000001 x25: 0000000000000075 x24: 0000000000000155
x23: ffff0000fbf0a021 x22: 000000000000000a x21: ffff0000fbf0a010
x20: 0000000000000075 x19: dfff800000000000 x18: 00000000ffffffff
x17: ffff800093507000 x16: ffff80008b007230 x15: 0000000000000001
x14: 1ffff00013bace84 x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000080000 x10: 00000000000030b4 x9 : 1945c2a2e1eaae00
x8 : 1945c2a2e1eaae00 x7 : ffff800080563af4 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000807de560
x2 : 0000000000000001 x1 : 0000000100000000 x0 : 000000000000002b
Call trace:
 dbFindLeaf+0x484/0x488 fs/jfs/jfs_dmap.c:2983 (P)
 dbAllocDmapLev+0x74/0x36c fs/jfs/jfs_dmap.c:1969
 dbAllocCtl+0x130/0x8e0 fs/jfs/jfs_dmap.c:1825
 dbAllocAG+0xa68/0xdc0 fs/jfs/jfs_dmap.c:1472
 dbDiscardAG+0x1e0/0x66c fs/jfs/jfs_dmap.c:1608
 jfs_ioc_trim+0x3e8/0x5e0 fs/jfs/jfs_discard.c:106
 jfs_ioctl+0x2e4/0x478 fs/jfs/ioctl.c:131
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:598 [inline]
 __se_sys_ioctl fs/ioctl.c:584 [inline]
 __arm64_sys_ioctl+0x14c/0x1c4 fs/ioctl.c:584
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 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+0x58/0x180 arch/arm64/kernel/entry-common.c:879
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
Code: f004c383 913d0063 528174e2 97945ae0 (d4210000) 
---[ end trace 0000000000000000 ]---