loop0: detected capacity change from 0 to 32768
BUG at fs/jfs/jfs_dmap.c:3096 assert(nb <= DBWORD)
------------[ cut here ]------------
kernel BUG at fs/jfs/jfs_dmap.c:3096!
Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 4935 Comm: syz.0.16 Not tainted 5.15.183-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : dbFindBits+0x184/0x1b0 fs/jfs/jfs_dmap.c:3096
lr : dbFindBits+0x184/0x1b0 fs/jfs/jfs_dmap.c:3096
sp : ffff80001f907890
x29: ffff80001f907890 x28: 00000000ffffffff x27: dfff800000000000
x26: ffff0000d571b800 x25: ffff0000d571b021 x24: 000000000000000a
x23: 0000000000000000 x22: ffff0000d9aa9000 x21: 0000000000000400
x20: 00000000ffffffff x19: 000000000000000a x18: 0000000000000002
x17: ffff800016cdf000 x16: ffff8000111a3d3c x15: ffff8000167bf4c0
x14: ffff0000d4b20a00 x13: 1ffff0000282a06b x12: 0000000000ff0100
x11: 0000000000000000 x10: 0000000000000000 x9 : 3025a2b2680c1c00
x8 : 3025a2b2680c1c00 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000000 x3 : ffff80000a732084
x2 : ffff0001a111cd10 x1 : 0000000100000000 x0 : 0000000000000032
Call trace:
 dbFindBits+0x184/0x1b0 fs/jfs/jfs_dmap.c:3096
 dbAllocDmapLev+0x13c/0x36c fs/jfs/jfs_dmap.c:2060
 dbAllocCtl+0x130/0x910 fs/jfs/jfs_dmap.c:1900
 dbAllocAG+0x1c4/0xd20 fs/jfs/jfs_dmap.c:1436
 dbDiscardAG+0x1e0/0x66c fs/jfs/jfs_dmap.c:1685
 jfs_ioc_trim+0x3dc/0x5d0 fs/jfs/jfs_discard.c:105
 jfs_ioctl+0x34c/0x524 fs/jfs/ioctl.c:132
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl fs/ioctl.c:860 [inline]
 __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:860
 __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: f003f4c3 91020063 52818302 95e4bee3 (d4210000) 
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