[syzbot] Monthly net report (Jul 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, 2 new issues were detected and 7 were fixed.
In total, 56 issues are still open and 1759 have already been fixed.
There are also 29 low-priority issues.

Some of the still happening issues:

Ref Crashes Repro Title
<1> 4131 Yes INFO: task hung in synchronize_rcu (4)
https://syzkaller.appspot.com/bug?extid=222aa26d0a5dbc2e84fe
<2> 937 No INFO: task hung in netdev_run_todo (4)
https://syzkaller.appspot.com/bug?extid=894cca71fa925aabfdb2
<3> 690 Yes INFO: task hung in tun_chr_close (5)
https://syzkaller.appspot.com/bug?extid=b0ae8f1abf7d891e0426
<4> 639 Yes WARNING in inet_sock_destruct (6)
https://syzkaller.appspot.com/bug?extid=5b3b7e51dda1be027b7a
<5> 491 No possible deadlock in __ipv6_dev_mc_inc
https://syzkaller.appspot.com/bug?extid=afbcf622635e98bf40d2
<6> 447 Yes INFO: task hung in nsim_destroy (4)
https://syzkaller.appspot.com/bug?extid=8141dcbd23a8f857798a
<7> 165 Yes INFO: rcu detected stall in sys_unshare (9)
https://syzkaller.appspot.com/bug?extid=872bccd9a68c6ba47718
<8> 116 Yes KASAN: use-after-free Read in qdisc_pkt_len_segs_init
https://syzkaller.appspot.com/bug?extid=83181a31faf9455499c5
<9> 91 Yes INFO: rcu detected stall in rescuer_thread (2)
https://syzkaller.appspot.com/bug?extid=d5f7a5097c24c7c2dbbb
<10> 1366 Yes possible deadlock in hsr_dev_xmit (2)
https://syzkaller.appspot.com/bug?extid=fbf74291c3b7e753b481

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