WARNING in nft_pipapo_destroy

Status: upstream: reported C repro on 2026/08/15 00:11
Bug presence: origin:lts-only
[Documentation on labels]
Reported-by: syzbot+fb0e154ca75b0e246d73@syzkaller.appspotmail.com
First crash: 61d, last: 16h16m
▶ ▼ Bug presence (2)
Date Name Commit Repro Result
2026/08/27 linux-6.1.y (ToT) 05208478041c C [report] WARNING in nft_pipapo_destroy
2026/08/27 upstream (ToT) 73e3f0710014 C Didn't crash
▶ ▼ Similar bugs (2)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 WARNING in nft_pipapo_destroy origin:lts-only -1 syz, C 52 5d09h 61d 0/3 upstream: reported C repro on 2026/08/15 00:10
linux-6.6 WARNING in nft_pipapo_destroy -1 68 16h10m 65d 0/2 upstream: reported on 2026/08/10 19:11
▶ ▼ Fix bisection attempts (1)
Created Duration User Patch Repo Result
2026/09/15 19:16 2h20m fix candidate upstream OK (0) job log

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 4456 at net/netfilter/nft_set_pipapo.c:2327 nft_pipapo_destroy+0x784/0x7e0 net/netfilter/nft_set_pipapo.c:2327
Modules linked in:
CPU: 0 PID: 4456 Comm: kworker/0:11 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026
Workqueue: events nf_tables_trans_destroy_work
pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : nft_pipapo_destroy+0x784/0x7e0 net/netfilter/nft_set_pipapo.c:2327
lr : nft_pipapo_destroy+0x784/0x7e0 net/netfilter/nft_set_pipapo.c:2327
sp : ffff8000215d7990
x29: ffff8000215d79b0 x28: dfff800000000000 x27: 1fffe0001b270e99
x26: dfff800000000000 x25: ffff0000d93874cc x24: ffff0000d9387400
x23: ffff0000cc32e918 x22: 000000000000000b x21: ffff800013c8f870
x20: ffff0000cc32e910 x19: ffff0000d93874f0 x18: 1fffe00033e6df7e
x17: ffff80001539d000 x16: ffff8000082dd264 x15: 0000000000000000
x14: 0000000000000018 x13: 0000000000ff0100 x12: ffff800017aa4a50
x11: ff008000103bba5c x10: 0000000000000000 x9 : ffff8000103bba5c
x8 : ffff0000d170b800 x7 : 0000000000000000 x6 : 000000000000003f
x5 : 0000000000000040 x4 : ffffffffffffffe0 x3 : 0000000000000000
x2 : ffff0000cc32e910 x1 : ffff0000d9387400 x0 : ffff0000cc32e928
Call trace:
 nft_pipapo_destroy+0x784/0x7e0 net/netfilter/nft_set_pipapo.c:2327
 nft_set_destroy+0x3ac/0x89c net/netfilter/nf_tables_api.c:5066
 nft_commit_release net/netfilter/nf_tables_api.c:9107 [inline]
 nf_tables_trans_destroy_work+0x980/0xd64 net/netfilter/nf_tables_api.c:9147
 process_one_work+0x7e4/0x13bc kernel/workqueue.c:2292
 worker_thread+0x8cc/0xfe8 kernel/workqueue.c:2439
 kthread+0x254/0x2e0 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850
irq event stamp: 8842
hardirqs last  enabled at (8841): [<ffff80000a97a108>] __free_object+0x1e8/0x878 lib/debugobjects.c:355
hardirqs last disabled at (8842): [<ffff800011b98ef4>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last  enabled at (8700): [<ffff80001097829c>] addrconf_dad_begin net/ipv6/addrconf.c:4103 [inline]
softirqs last  enabled at (8700): [<ffff80001097829c>] addrconf_dad_work+0x324/0x10a0 net/ipv6/addrconf.c:4171
softirqs last disabled at (8692): [<ffff800010978260>] addrconf_dad_begin net/ipv6/addrconf.c:4048 [inline]
softirqs last disabled at (8692): [<ffff800010978260>] addrconf_dad_work+0x2e8/0x10a0 net/ipv6/addrconf.c:4171
---[ end trace 0000000000000000 ]---

Crashes (124):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/08/21 07:15 linux-6.1.y 7e6e67054721 1e72964b .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in nft_pipapo_destroy
2026/10/14 11:46 linux-6.1.y a500ba24937a 1a71827b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in nft_pipapo_destroy
2026/10/08 17:41 linux-6.1.y a500ba24937a b2734a59 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in nft_pipapo_destroy
2026/10/07 10:13 linux-6.1.y a500ba24937a 6520ecdb .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in nft_pipapo_destroy
2026/10/06 00:07 linux-6.1.y a500ba24937a f7710056 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in nft_pipapo_destroy
2026/10/05 12:00 linux-6.1.y a500ba24937a af63e995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in nft_pipapo_destroy
2026/10/01 12:47 linux-6.1.y 1a8763b93150 f5cdae2f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in nft_pipapo_destroy
2026/09/30 18:37 linux-6.1.y 1a8763b93150 38f7f0d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in nft_pipapo_destroy
2026/09/30 06:23 linux-6.1.y 1a8763b93150 7808aef4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in nft_pipapo_destroy
2026/09/29 17:43 linux-6.1.y 1a8763b93150 328436b3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in nft_pipapo_destroy
2026/09/29 01:01 linux-6.1.y 1a8763b93150 7bf4ea23 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in nft_pipapo_destroy
2026/09/29 01:01 linux-6.1.y 1a8763b93150 7bf4ea23 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in nft_pipapo_destroy
2026/09/26 02:55 linux-6.1.y 1a8763b93150 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in nft_pipapo_destroy
2026/09/25 02:38 linux-6.1.y 1a8763b93150 f281d9d2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in nft_pipapo_destroy
2026/09/24 14:27 linux-6.1.y 1a8763b93150 3c3cdf19 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in nft_pipapo_destroy
2026/09/22 20:16 linux-6.1.y 1a8763b93150 5207b90e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in nft_pipapo_destroy
2026/09/16 23:17 linux-6.1.y 1a8763b93150 95928915 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in nft_pipapo_destroy
2026/09/16 05:00 linux-6.1.y 1a8763b93150 12a0a44a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in nft_pipapo_destroy
2026/09/14 13:14 linux-6.1.y 1a8763b93150 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in nft_pipapo_destroy
2026/09/12 01:11 linux-6.1.y cf82dcca9634 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in nft_pipapo_destroy
2026/09/10 10:48 linux-6.1.y cf82dcca9634 1fe56c0a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in nft_pipapo_destroy
2026/09/09 04:18 linux-6.1.y cf82dcca9634 8387c273 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in nft_pipapo_destroy
2026/09/08 15:28 linux-6.1.y cf82dcca9634 243b72f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in nft_pipapo_destroy
2026/09/08 15:28 linux-6.1.y cf82dcca9634 243b72f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in nft_pipapo_destroy
2026/09/07 12:07 linux-6.1.y cf82dcca9634 680aa3e1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in nft_pipapo_destroy
2026/09/07 12:06 linux-6.1.y cf82dcca9634 680aa3e1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in nft_pipapo_destroy
2026/09/07 12:05 linux-6.1.y cf82dcca9634 680aa3e1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in nft_pipapo_destroy
2026/09/04 23:13 linux-6.1.y cf82dcca9634 4f7b22a0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in nft_pipapo_destroy
2026/09/04 23:11 linux-6.1.y cf82dcca9634 4f7b22a0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in nft_pipapo_destroy
2026/09/04 23:11 linux-6.1.y cf82dcca9634 4f7b22a0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in nft_pipapo_destroy
2026/09/04 23:10 linux-6.1.y cf82dcca9634 4f7b22a0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in nft_pipapo_destroy
2026/09/03 21:18 linux-6.1.y cf82dcca9634 801f0966 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in nft_pipapo_destroy
2026/09/03 21:18 linux-6.1.y cf82dcca9634 801f0966 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in nft_pipapo_destroy
2026/10/13 07:18 linux-6.1.y a500ba24937a 5a1eeac4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in nft_pipapo_destroy
2026/10/12 13:45 linux-6.1.y a500ba24937a 745a967f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in nft_pipapo_destroy
2026/10/09 18:00 linux-6.1.y a500ba24937a 4f92358f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in nft_pipapo_destroy
2026/10/03 11:41 linux-6.1.y a500ba24937a 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in nft_pipapo_destroy
2026/10/02 17:34 linux-6.1.y 1a8763b93150 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in nft_pipapo_destroy
2026/10/02 01:31 linux-6.1.y 1a8763b93150 6d32eb1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in nft_pipapo_destroy
2026/10/02 01:31 linux-6.1.y 1a8763b93150 6d32eb1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in nft_pipapo_destroy
2026/09/24 02:10 linux-6.1.y 1a8763b93150 0281b448 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in nft_pipapo_destroy
2026/09/23 10:51 linux-6.1.y 1a8763b93150 abce1216 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in nft_pipapo_destroy
2026/09/22 20:04 linux-6.1.y 1a8763b93150 5207b90e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in nft_pipapo_destroy
2026/09/22 04:48 linux-6.1.y 1a8763b93150 e12281bd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in nft_pipapo_destroy
2026/09/17 16:57 linux-6.1.y 1a8763b93150 8d7d05f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in nft_pipapo_destroy
2026/08/15 00:11 linux-6.1.y e4f7d8be268e 746171ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in nft_pipapo_destroy
* Struck through repros no longer work on HEAD.