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] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 4487 Comm: syz.0.23 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026
pstate: 62400005 (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 : ffff800020e278c0
x29: ffff800020e278c0 x28: ffff0000cbbf5021 x27: dfff800000000000
x26: 00000000ffffffff x25: ffff0000cbbf5800 x24: 000000000000000a
x23: 0000000000000000 x22: ffff0000f76de000 x21: 0000000000000400
x20: 00000000ffffffff x19: 000000000000000a x18: 1fffe00033e7277e
x17: ffff80001537d000 x16: ffff800011b8ee98 x15: ffff00019f393bfc
x14: 0000000000000001 x13: 1ffff000041c4e80 x12: 0000000000000000
x11: ff00800008315174 x10: 0000000000000000 x9 : 7dd2a965d5385c00
x8 : 7dd2a965d5385c00 x7 : ffff80000825ab3c x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : ffff80000a91ef3c
x2 : ffff00019f393d10 x1 : 0000000100000000 x0 : 0000000000000032
Call trace:
 dbFindBits+0x184/0x1b0 fs/jfs/jfs_dmap.c:3021
 dbAllocDmapLev+0x140/0x348 fs/jfs/jfs_dmap.c:1985
 dbAllocCtl+0x128/0x8c0 fs/jfs/jfs_dmap.c:1825
 dbAllocAG+0x1bc/0xe24 fs/jfs/jfs_dmap.c:1353
 dbDiscardAG+0x1e0/0x674 fs/jfs/jfs_dmap.c:1608
 jfs_ioc_trim+0x3f8/0x5f0 fs/jfs/jfs_discard.c:105
 jfs_ioctl+0x2ec/0x448 fs/jfs/ioctl.c:131
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl fs/ioctl.c:856 [inline]
 __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:856
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 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: 90043ce3 91390063 528179a2 979d7202 (d4210000) 
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