[syzbot] Monthly net report (Sep 2026)

[syzbot]

Hello net maintainers/developers,

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

During the period, 7 new issues were detected and 15 were fixed.
In total, 56 issues are still open and 1793 have already been fixed.
There are also 30 low-priority issues.

Some of the still happening issues:

Ref  Crashes Repro Title
<1>  816     Yes   INFO: task hung in tun_chr_close (5)
                   https://syzkaller.appspot.com/bug?extid=b0ae8f1abf7d891e0426
<2>  641     Yes   WARNING in inet_sock_destruct (6)
                   https://syzkaller.appspot.com/bug?extid=5b3b7e51dda1be027b7a
<3>  509     No    possible deadlock in __ipv6_dev_mc_inc
                   https://syzkaller.appspot.com/bug?extid=afbcf622635e98bf40d2
<4>  500     Yes   INFO: task hung in nsim_destroy (4)
                   https://syzkaller.appspot.com/bug?extid=8141dcbd23a8f857798a
<5>  126     No    INFO: task hung in rxrpc_destroy_all_calls (4)
                   https://syzkaller.appspot.com/bug?extid=1c21ab751f6531a595d6
<6>  43      Yes   UBSAN: array-index-out-of-bounds in llc_conn_state_process (2)
                   https://syzkaller.appspot.com/bug?extid=628f93722c08dc5aabe0
<7>  2574    Yes   INFO: task hung in addrconf_dad_work (5)
                   https://syzkaller.appspot.com/bug?extid=82ccd564344eeaa5427d
<8>  1209    Yes   INFO: task hung in switchdev_deferred_process_work (3)
                   https://syzkaller.appspot.com/bug?extid=d6bbe0f5705cb8a5aa2b
<9>  676     Yes   INFO: rcu detected stall in tc_modify_qdisc
                   https://syzkaller.appspot.com/bug?extid=9f78d5c664a8c33f4cce
<10> 252     Yes   INFO: rcu detected stall in rtnl_newlink (5)
                   https://syzkaller.appspot.com/bug?extid=2e90866706ad999df132

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