[syzbot] Monthly bluetooth report (Apr 2026)

[syzbot] Monthly bluetooth report (Apr 2026)

[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, 1 new issues were detected and 1 were fixed.
In total, 32 issues are still open and 100 have already been fixed.

Some of the still happening issues:

Ref  Crashes Repro Title
<1>  13597   Yes   WARNING in hci_conn_timeout (2)
                   https://syzkaller.appspot.com/bug?extid=fc4b5b2477d4ca272907
<2>  8418    Yes   WARNING in call_timer_fn
                   https://syzkaller.appspot.com/bug?extid=6fb78d577e89e69602f9
<3>  4468    Yes   general protection fault in lock_sock_nested
                   https://syzkaller.appspot.com/bug?extid=d3ccfb78a0dc16ffebe3
<4>  1400    No    KASAN: vmalloc-out-of-bounds Read in kcov_remote_start
                   https://syzkaller.appspot.com/bug?extid=8a173e13208949931dc7
<5>  1022    Yes   KASAN: slab-use-after-free Write in hci_conn_drop (3)
                   https://syzkaller.appspot.com/bug?extid=3609b9b48e68e1fe47fd
<6>  569     Yes   possible deadlock in l2cap_conn_del
                   https://syzkaller.appspot.com/bug?extid=b71bb48c13bf3fed3692
<7>  351     No    WARNING in l2cap_chan_del
                   https://syzkaller.appspot.com/bug?extid=3272785b7a1fc9b510f6
<8>  273     Yes   KASAN: wild-memory-access Read in l2cap_connect_cfm
                   https://syzkaller.appspot.com/bug?extid=0e4ebcc970728e056324
<9>  167     Yes   WARNING in hci_recv_frame
                   https://syzkaller.appspot.com/bug?extid=3e07a461b836821ff70e
<10> 147     Yes   KASAN: slab-use-after-free Read in l2cap_sock_new_connection_cb
                   https://syzkaller.appspot.com/bug?extid=cdae834448ec8c3602fe

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