lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Fri, 29 Nov 2019 06:54:47 +0100 From: Lukas Bulwahn <lukas.bulwahn@...il.com> To: Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp> Cc: syzbot <syzbot+30209ea299c09d8785c9@...kaller.appspotmail.com>, YueHaibing <yuehaibing@...wei.com>, Jouni Hogander <jouni.hogander@...kie.com>, Julian Anastasov <ja@....bg>, ddstreet@...e.org, Dmitry Vyukov <dvyukov@...gle.com>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, Netdev <netdev@...r.kernel.org>, syzkaller-bugs@...glegroups.com, Hulk Robot <hulkci@...wei.com>, "David S. Miller" <davem@...emloft.net> Subject: Re: unregister_netdevice: waiting for DEV to become free (2) On Thu, Nov 28, 2019 at 10:56 AM Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp> wrote: > > Hello people involved in commit a3e23f719f5c4a38 ("net-sysfs: call dev_hold if kobject_init_and_add success") > and commit b8eb718348b8fb30 ("net-sysfs: Fix reference count leak in rx|netdev_queue_add_kobject"). > > syzbot is reporting that unregister_netdevice() hangs due to underflowing > device refcount when kobject_init_and_add() failed due to -ENOMEM. > Tetsuo, would you happen to have a C reproducer program that creates the trace you reported? I could not quickly find one that by the date would fit to when we included our change on this syzbot page: https://syzkaller.appspot.com/bug?id=bae9a2236bfede42cf3d219e6bf6740c583568a4 Jouni, can you please follow up on this report. Thanks. Lukas
Powered by blists - more mailing lists