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Fri, 16 Oct 2026 09:35:24 -0700 (PDT) Date: Fri, 16 Oct 2026 09:35:23 -0700 In-Reply-To: <20261016085202.1670076-1-pablo@netfilter.org> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6ad2524b.7952420f.283480.034b.GAE@google.com> Subject: [syzbot ci] Re: netfilter: flowtable: do not hw offload flows in teardown state From: syzbot ci To: netfilter-devel@vger.kernel.org, pablo@netfilter.org Cc: syzbot@lists.linux.dev, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" syzbot ci has tested the following series [v1] netfilter: flowtable: do not hw offload flows in teardown state https://lore.kernel.org/all/20261016085202.1670076-1-pablo@netfilter.org * [PATCH nf-next] netfilter: flowtable: do not hw offload flows in teardown state and found the following issue: WARNING in nf_conntrack_cleanup_net_list Full report is available here: https://ci.syzbot.org/series/ea5f346a-b1ba-462a-a812-0b29a292b49e *** WARNING in nf_conntrack_cleanup_net_list tree: nf-next URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/netfilter/nf-next.git base: a5e7d8e446af9803e37a3b6a4d416fb41178348f arch: amd64 compiler: Debian clang version 22.1.8 (1~deb13u4), Debian LLD 22.1.8 config: https://ci.syzbot.org/builds/90f3437c-11cd-439b-8d1a-bb938b62b48e/config ------------[ cut here ]------------ conntrack cleanup blocked for 60s WARNING: net/netfilter/nf_conntrack_core.c:2504 at nf_conntrack_cleanup_net_list+0x21f/0x360, CPU#0: kworker/u8:0/12 Modules linked in: CPU: 0 UID: 0 PID: 12 Comm: kworker/u8:0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Workqueue: netns cleanup_net RIP: 0010:nf_conntrack_cleanup_net_list+0x21f/0x360 Code: 4c 89 ef e8 63 bd 37 f8 4d 8b 7d 00 4d 39 ef 74 69 e8 f5 eb c6 f7 45 31 e4 e9 a5 fe ff ff e8 e8 eb c6 f7 48 8d 3d 41 56 88 07 <67> 48 0f b9 3a eb c0 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c da fe ff RSP: 0018:ffffc900001178b0 EFLAGS: 00010293 RAX: ffffffff8a011228 RBX: dffffc0000000000 RCX: ffff888102eb8000 RDX: 0000000000000000 RSI: ffffffffffffffc9 RDI: ffffffff91896870 RBP: 0000000000000021 R08: ffff888116ce7c03 R09: 1ffff11022d9cf80 R10: dffffc0000000000 R11: ffffed1022d9cf81 R12: 000000010002f152 R13: ffffc90000117a50 R14: ffffc90000117a50 R15: 000000010002f189 FS: 0000000000000000(0000) GS:ffff88818c4d4000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6e7bd28ae0 CR3: 00000000132ca000 CR4: 00000000000006f0 Call Trace: ops_undo_list+0x4b4/0x8d0 cleanup_net+0x572/0x810 process_scheduled_works+0xc3d/0x1630 worker_thread+0xa47/0xfb0 kthread+0x38b/0x480 ret_from_fork+0x514/0xb70 ret_from_fork_asm+0x1a/0x30 *** If these findings have caused you to resend the series or submit a separate fix, please add the following tag to your commit message: Tested-by: syzbot@syzkaller.appspotmail.com --- This report is generated by a bot. It may contain errors. syzbot ci engineers can be reached at syzkaller@googlegroups.com. To test a fix for this bug, please reply with `#syz test` (on a separate line) and attach the patch to the email. Notes: - The patch will be applied on top of the tested series (as an incremental fix). - To test a new version of the whole series, please send it directly to syzbot@lists.linux.dev. - Arguments like custom git repos and branches are not supported.