tcp: release sk_frag.page in tcp_disconnect

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[ Upstream commit 9b42d55a66 ]

socket can be disconnected and gets transformed back to a listening
socket, if sk_frag.page is not released, which will be cloned into
a new socket by sk_clone_lock, but the reference count of this page
is increased, lead to a use after free or double free issue

Signed-off-by: Li RongQing <lirongqing@baidu.com>
Cc: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Li RongQing 2018-01-26 16:40:41 +08:00 • committed by Greg Kroah-Hartman

parent b0acbef9ed

commit f76c9a0fbf

1 changed files with 6 additions and 0 deletions

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net/ipv4/tcp.c

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