Messages in this thread Patch in this message | | | From | Hillf Danton <> | Subject | Re: [syzbot] [pm?] KASAN: use-after-free Read in netdev_unregister_kobject | Date | Tue, 23 Apr 2024 07:16:17 +0800 |
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On Mon, 22 Apr 2024 08:35:25 -0700 > syzbot found the following issue on: > > HEAD commit: 3cdb45594619 Merge tag 's390-6.9-4' of git://git.kernel.or.. > git tree: upstream > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=144067cb180000
#syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 3cdb45594619
--- x/net/bluetooth/bnep/core.c +++ y/net/bluetooth/bnep/core.c @@ -659,7 +659,7 @@ int bnep_del_connection(struct bnep_conn if (req->flags & ~valid_flags) return -EINVAL; - down_read(&bnep_session_sem); + down_write(&bnep_session_sem); s = __bnep_get_session(req->dst); if (s) { @@ -668,7 +668,7 @@ int bnep_del_connection(struct bnep_conn } else err = -ENOENT; - up_read(&bnep_session_sem); + up_write(&bnep_session_sem); return err; } --
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