From: Sowmini Varadhan <sowmini.varadhan-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org> To: Dmitry Vyukov <dvyukov-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org> Cc: santosh.shilimkar-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org, David Miller <davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>, netdev <netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, rds-devel-N0ozoZBvEnrZJqsBc5GL+g@public.gmane.org, LKML <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, Eric Dumazet <edumazet-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>, syzkaller <syzkaller-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org> Subject: Re: net/rds: use-after-free in inet_create Date: Tue, 28 Feb 2017 17:24:10 -0500 [thread overview] Message-ID: <20170228222410.GA32635@oracle.com> (raw) In-Reply-To: <CACT4Y+Y5eM8hKQ7BgA4hEN7ozkhRGgvGJRU6Smrths6noC-PMw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> Actually, I'm not sure if I can assert that these are all manifestations of the same bug- was a netns-delete involved in this one as well? I see: > BUG: KASAN: use-after-free in memcmp+0xe3/0x160 lib/string.c:768 at : > memcmp+0xe3/0x160 lib/string.c:768 : > rds_find_bound+0x4fe/0x8a0 net/rds/bind.c:63 > rds_recv_incoming+0x5f3/0x12c0 net/rds/recv.c:349 > rds_loop_xmit+0x1c5/0x490 net/rds/loop.c:82 : This appears to be for a looped back packet, and looks like there are problems with some rds_sock that got removed from the bind_hash_table.. According to the report, socket was created at > Allocated: > PID = 5235 : > sk_prot_alloc+0x65/0x2a0 net/core/sock.c:1334 > sk_alloc+0x105/0x1010 net/core/sock.c:1396 > rds_create+0x11c/0x600 net/rds/af_rds.c:504 and closed at some point: > Freed: > PID = 5235 : > rds_release+0x3a1/0x4d0 net/rds/af_rds.c:89 > sock_release+0x8d/0x1e0 net/socket.c:599 This is all uspace created rds sockets, and while there may be an unrelated bug here, I'm not sure I see the netns/kernel-socket connection.. can you please clarify if this was also seen in some netns context? --Sowmini -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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From: Sowmini Varadhan <sowmini.varadhan@oracle.com> To: Dmitry Vyukov <dvyukov@google.com> Cc: santosh.shilimkar@oracle.com, David Miller <davem@davemloft.net>, netdev <netdev@vger.kernel.org>, linux-rdma@vger.kernel.org, rds-devel@oss.oracle.com, LKML <linux-kernel@vger.kernel.org>, Eric Dumazet <edumazet@google.com>, syzkaller <syzkaller@googlegroups.com> Subject: Re: net/rds: use-after-free in inet_create Date: Tue, 28 Feb 2017 17:24:10 -0500 [thread overview] Message-ID: <20170228222410.GA32635@oracle.com> (raw) In-Reply-To: <CACT4Y+Y5eM8hKQ7BgA4hEN7ozkhRGgvGJRU6Smrths6noC-PMw@mail.gmail.com> Actually, I'm not sure if I can assert that these are all manifestations of the same bug- was a netns-delete involved in this one as well? I see: > BUG: KASAN: use-after-free in memcmp+0xe3/0x160 lib/string.c:768 at : > memcmp+0xe3/0x160 lib/string.c:768 : > rds_find_bound+0x4fe/0x8a0 net/rds/bind.c:63 > rds_recv_incoming+0x5f3/0x12c0 net/rds/recv.c:349 > rds_loop_xmit+0x1c5/0x490 net/rds/loop.c:82 : This appears to be for a looped back packet, and looks like there are problems with some rds_sock that got removed from the bind_hash_table.. According to the report, socket was created at > Allocated: > PID = 5235 : > sk_prot_alloc+0x65/0x2a0 net/core/sock.c:1334 > sk_alloc+0x105/0x1010 net/core/sock.c:1396 > rds_create+0x11c/0x600 net/rds/af_rds.c:504 and closed at some point: > Freed: > PID = 5235 : > rds_release+0x3a1/0x4d0 net/rds/af_rds.c:89 > sock_release+0x8d/0x1e0 net/socket.c:599 This is all uspace created rds sockets, and while there may be an unrelated bug here, I'm not sure I see the netns/kernel-socket connection.. can you please clarify if this was also seen in some netns context? --Sowmini
next prev parent reply other threads:[~2017-02-28 22:24 UTC|newest] Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top 2017-02-28 14:22 net/rds: use-after-free in inet_create Dmitry Vyukov [not found] ` <CACT4Y+bi=rZr9yrajA0o0iUeR4N0q-sXYudBVsOeOiHbuApBeA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2017-02-28 15:37 ` Sowmini Varadhan 2017-02-28 15:37 ` Sowmini Varadhan 2017-02-28 15:49 ` Dmitry Vyukov 2017-02-28 16:15 ` Sowmini Varadhan 2017-02-28 16:32 ` Dmitry Vyukov 2017-02-28 16:38 ` Sowmini Varadhan [not found] ` <20170228163833.GI31155-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org> 2017-02-28 16:51 ` Dmitry Vyukov 2017-02-28 16:51 ` Dmitry Vyukov [not found] ` <CACT4Y+Y5eM8hKQ7BgA4hEN7ozkhRGgvGJRU6Smrths6noC-PMw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2017-02-28 17:33 ` Sowmini Varadhan 2017-02-28 17:33 ` Sowmini Varadhan [not found] ` <20170228173328.GL31155-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org> 2017-02-28 17:45 ` Dmitry Vyukov 2017-02-28 17:45 ` Dmitry Vyukov 2017-02-28 17:48 ` Sowmini Varadhan 2017-02-28 22:24 ` Sowmini Varadhan [this message] 2017-02-28 22:24 ` Sowmini Varadhan 2017-03-01 9:47 ` Dmitry Vyukov 2017-02-28 21:06 ` Sowmini Varadhan 2017-02-28 21:14 ` Dmitry Vyukov 2017-02-28 21:37 ` Sowmini Varadhan
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