list_add corruption. next is NULL. ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:28! Internal error: Oops - BUG: 00000000f2000800 [#1] SMP Modules linked in: CPU: 1 UID: 0 PID: 99 Comm: jfsCommit Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 pstate: 634000c5 (nZCv daIF +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : __list_add_valid_or_report+0xdc/0x148 lib/list_debug.c:27 lr : __list_add_valid_or_report+0xdc/0x148 lib/list_debug.c:27 sp : ffff8000993e7b50 x29: ffff8000993e7b50 x28: dfff800000000000 x27: 0000000080000000 x26: 0000000000000000 x25: 0000000000000000 x24: ffff0000f9246108 x23: ffff80009b403230 x22: 1ffff00013680646 x21: ffff80009b403220 x20: ffff0000f9246118 x19: 0000000000000000 x18: 00000000ffffffff x17: ffff800093335000 x16: ffff800082defcc0 x15: 0000000000000001 x14: 1ffff0001327cee4 x13: 0000000000000000 x12: 0000000000000000 x11: ffff70001327cee5 x10: 0000000000ff0100 x9 : b02559449cb0bd00 x8 : b02559449cb0bd00 x7 : ffff800080565b88 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000000 x3 : ffff8000807d6f80 x2 : 0000000000000001 x1 : 0000000100000001 x0 : 0000000000000022 Call trace: __list_add_valid_or_report+0xdc/0x148 lib/list_debug.c:27 (P) __list_add_valid include/linux/list.h:96 [inline] __list_add include/linux/list.h:158 [inline] list_add include/linux/list.h:177 [inline] diUpdatePMap+0x4e8/0xb90 fs/jfs/jfs_imap.c:2831 txUpdateMap+0x708/0x8d0 fs/jfs/jfs_txnmgr.c:2357 txLazyCommit fs/jfs/jfs_txnmgr.c:2665 [inline] jfs_lazycommit+0x394/0x94c fs/jfs/jfs_txnmgr.c:2734 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 Code: d4210000 900430e0 911a0000 974c5823 (d4210000) ---[ end trace 0000000000000000 ]---