[syzbot] Monthly netfilter report (Mar 2026)

[syzbot] Monthly netfilter report (Mar 2026)

[syzbot]

Hello netfilter maintainers/developers,

This is a 31-day syzbot report for the netfilter subsystem.
All related reports/information can be found at:
https://syzkaller.appspot.com/upstream/s/netfilter

During the period, 2 new issues were detected and 2 were fixed.
In total, 13 issues are still open and 196 have already been fixed.

Some of the still happening issues:

Ref Crashes Repro Title
<1> 4918    Yes   INFO: rcu detected stall in worker_thread (9)
                  https://syzkaller.appspot.com/bug?extid=225bfad78b079744fd5e
<2> 692     Yes   INFO: rcu detected stall in addrconf_rs_timer (6)
                  https://syzkaller.appspot.com/bug?extid=fecf8bd19c1f78edb255
<3> 325     Yes   INFO: rcu detected stall in gc_worker (3)
                  https://syzkaller.appspot.com/bug?extid=eec403943a2a2455adaa
<4> 68      No    INFO: task hung in nfnetlink_rcv_msg (5)
                  https://syzkaller.appspot.com/bug?extid=c4b20b80ee6a7a2f5012
<5> 11      Yes   KMSAN: uninit-value in ip6table_mangle_hook (3)
                  https://syzkaller.appspot.com/bug?extid=6023ea32e206eef7920a
<6> 6       Yes   WARNING in nf_ct_bridge_post
                  https://syzkaller.appspot.com/bug?extid=a8ba738fe2db6b4bb27f

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This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
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