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: 5743 Comm: syz.0.342 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 : ffff8000216f76e0
x29: ffff8000216f7710 x28: 0000000000000048 x27: 0000000000008001
x26: 0000000000000000 x25: 0000000000000000 x24: 0000000000000005
x23: ffff80002018a000 x22: ffff80002018a000 x21: dfff800000000000
x20: ffff80002018a168 x19: 1ffff00004031400 x18: 1fffe00033e8417e
x17: 0000000000000000 x16: ffff800011b3e320 x15: 0000000000000002
x14: 0000000000000001 x13: 1ffff000042dee44 x12: 0000000000080000
x11: 000000000002df25 x10: ffff800025689000 x9 : f010bc8dd96bce00
x8 : f010bc8dd96bce00 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff8000216f71b8 x4 : ffff800015414e60 x3 : ffff80000a8d09fc
x2 : ffff00019f420d10 x1 : 0000000100000000 x0 : 000000000000002b
Call trace:
 txLock+0x1714/0x18ac fs/jfs/jfs_txnmgr.c:662
 diWrite+0x354/0x1268 fs/jfs/jfs_imap.c:654
 txCommit+0x608/0x3d34 fs/jfs/jfs_txnmgr.c:1256
 jfs_mkdir+0x730/0x8fc fs/jfs/namei.c:290
 vfs_mkdir+0x314/0x4d8 fs/namei.c:4114
 do_mkdirat+0x1b8/0x3ec fs/namei.c:4139
 __do_sys_mkdirat fs/namei.c:4154 [inline]
 __se_sys_mkdirat fs/namei.c:4152 [inline]
 __arm64_sys_mkdirat+0x90/0xa8 fs/namei.c:4152
 __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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