[syzbot] Monthly bluetooth report (Dec 2025)

[syzbot] Monthly bluetooth report (Dec 2025)

[syzbot]

Hello bluetooth maintainers/developers,

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

During the period, 7 new issues were detected and 0 were fixed.
In total, 44 issues are still open and 96 have already been fixed.

Some of the still happening issues:

Ref  Crashes Repro Title
<1>  45703   Yes   KASAN: slab-use-after-free Read in l2cap_unregister_user
                   https://syzkaller.appspot.com/bug?extid=14b6d57fb728e27ce23c
<2>  7893    Yes   WARNING in call_timer_fn
                   https://syzkaller.appspot.com/bug?extid=6fb78d577e89e69602f9
<3>  4001    Yes   general protection fault in lock_sock_nested
                   https://syzkaller.appspot.com/bug?extid=d3ccfb78a0dc16ffebe3
<4>  3361    Yes   WARNING in hci_conn_timeout (2)
                   https://syzkaller.appspot.com/bug?extid=fc4b5b2477d4ca272907
<5>  2969    Yes   general protection fault in h5_recv
                   https://syzkaller.appspot.com/bug?extid=b5691bb559396b262064
<6>  596     No    KASAN: vmalloc-out-of-bounds Read in kcov_remote_start
                   https://syzkaller.appspot.com/bug?extid=8a173e13208949931dc7
<7>  440     Yes   possible deadlock in l2cap_conn_del
                   https://syzkaller.appspot.com/bug?extid=b71bb48c13bf3fed3692
<8>  426     Yes   WARNING: ODEBUG bug in hci_release_dev (2)
                   https://syzkaller.appspot.com/bug?extid=b170dbf55520ebf5969a
<9>  335     No    WARNING in l2cap_chan_del
                   https://syzkaller.appspot.com/bug?extid=3272785b7a1fc9b510f6
<10> 246     Yes   KASAN: slab-use-after-free Write in hci_conn_drop (3)
                   https://syzkaller.appspot.com/bug?extid=3609b9b48e68e1fe47fd

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