BUG at fs/jfs/jfs_dmap.c:3021 assert(nb <= DBWORD)
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kernel BUG at fs/jfs/jfs_dmap.c:3021!
Internal error: Oops - BUG: 00000000f2000800 [#1]  SMP
Modules linked in:
CPU: 0 UID: 0 PID: 8072 Comm: syz.4.235 Not tainted syzkaller #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 : dbFindBits+0x184/0x1b0 fs/jfs/jfs_dmap.c:3021
lr : dbFindBits+0x184/0x1b0 fs/jfs/jfs_dmap.c:3021
sp : ffff80009e7d7890
x29: ffff80009e7d7890 x28: 00000000ffffffff x27: dfff800000000000
x26: ffff0000d5aa79d4 x25: ffff0000d5aa7021 x24: 000000000000000a
x23: 000000000008fba0 x22: ffff0000cbf15000 x21: 0000000000000400
x20: 0000000000000000 x19: 000000000000000a x18: 1fffe00033797688
x17: ffff80008f7de000 x16: ffff80008b0155d8 x15: 0000000000000001
x14: 1ffff00013cfae88 x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000080000 x10: 0000000000001ede x9 : 87a6328664301e00
x8 : 87a6328664301e00 x7 : ffff800080490a90 x6 : 0000000000000000
x5 : 0000000000000001 x4 : 0000000000000001 x3 : ffff8000807de538
x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000032
Call trace:
 dbFindBits+0x184/0x1b0 fs/jfs/jfs_dmap.c:3021 (P)
 dbAllocDmapLev+0x13c/0x36c fs/jfs/jfs_dmap.c:1985
 dbAllocCtl+0x130/0x8e0 fs/jfs/jfs_dmap.c:1825
 dbAllocAG+0x1c0/0xdc0 fs/jfs/jfs_dmap.c:1353
 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+0x5c/0x254 arch/arm64/kernel/entry-common.c:744
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:763
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
Code: f004c403 91150063 528179a2 9794543a (d4210000) 
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