BUG at fs/jfs/jfs_txnmgr.c:662 assert(last)
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kernel BUG at fs/jfs/jfs_txnmgr.c:662!
Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 4520 Comm: syz.0.24 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 : txLock+0x1714/0x18ac fs/jfs/jfs_txnmgr.c:662
lr : txLock+0x1714/0x18ac fs/jfs/jfs_txnmgr.c:662
sp : ffff800021b57110
x29: ffff800021b57140 x28: 0000000000000048 x27: 0000000000002020
x26: 0000000000000000 x25: 0000000000000000 x24: 0000000000000005
x23: ffff8000201ca000 x22: ffff8000201ca000 x21: dfff800000000000
x20: ffff8000201ca168 x19: 1ffff00004039400 x18: 0000000000000000
x17: 0000000000000000 x16: ffff800011b3e320 x15: 0000000000000002
x14: 0000000000000001 x13: 1ffff0000436ad88 x12: 0000000000080000
x11: 000000000000738c x10: ffff800022359000 x9 : b3019edaaa372200
x8 : b3019edaaa372200 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff800021b56bd8 x4 : ffff800015414e60 x3 : ffff80000a8d09fc
x2 : ffff00019f420d10 x1 : 0000000100000000 x0 : 000000000000002b
Call trace:
 txLock+0x1714/0x18ac fs/jfs/jfs_txnmgr.c:662
 dtSplitRoot+0x298/0x11b8 fs/jfs/jfs_dtree.c:1927
 dtSplitUp fs/jfs/jfs_dtree.c:993 [inline]
 dtInsert+0xb10/0x5710 fs/jfs/jfs_dtree.c:871
 jfs_create+0x5d0/0x90c fs/jfs/namei.c:137
 lookup_open fs/namei.c:3490 [inline]
 open_last_lookups fs/namei.c:3558 [inline]
 path_openat+0xda8/0x27a0 fs/namei.c:3788
 do_filp_open+0x198/0x38c fs/namei.c:3818
 do_sys_openat2+0x134/0x3fc fs/open.c:1320
 do_sys_open fs/open.c:1336 [inline]
 __do_sys_openat fs/open.c:1352 [inline]
 __se_sys_openat fs/open.c:1347 [inline]
 __arm64_sys_openat+0x11c/0x150 fs/open.c:1347
 __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: d0043903 911f0063 528052c2 979cb989 (d4210000) 
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