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: 0 PID: 4461 Comm: syz.2.62 Not tainted 5.15.186-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
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 : ffff800020227890
x29: ffff800020227890 x28: 00000000ffffffff x27: dfff800000000000
x26: ffff0000cd8549d4 x25: ffff0000cd854021 x24: 000000000000000a
x23: 000000000008fba0 x22: ffff0000e7df7000 x21: 0000000000000400
x20: 0000000000000000 x19: 000000000000000a x18: 0000000000000001
x17: 0000000000000002 x16: ffff8000111b2714 x15: 00000000ffffffff
x14: 0000000000ff0100 x13: 0000000000000001 x12: 0000000000080000
x11: 000000000000ccb0 x10: ffff80002681b000 x9 : 1223f43192b09b00
x8 : 1223f43192b09b00 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff800020227178 x4 : ffff80001423f400 x3 : ffff80000a7343e4
x2 : ffff0001a10e9d50 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+0x3e8/0x5e0 fs/jfs/jfs_discard.c:106
 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: b003f543 91010063 52818302 95e4f050 (d4210000) 
---[ end trace 94d543971341c730 ]---