Xie He f6f751cb31 net: x25: Increase refcnt of "struct x25_neigh" in x25_rx_call_request ... [ Upstream commit 4ee18c179e ] The x25_disconnect function in x25_subr.c would decrease the refcount of "x25->neighbour" (struct x25_neigh) and reset this pointer to NULL. However, the x25_rx_call_request function in af_x25.c, which is called when we receive a connection request, does not increase the refcount when it assigns the pointer. Fix this issue by increasing the refcount of "struct x25_neigh" in x25_rx_call_request. This patch fixes frequent kernel crashes when using AF_X25 sockets. Fixes: 4becb7ee5b ("net/x25: Fix x25_neigh refcnt leak when x25 disconnect") Cc: Martin Schiller <ms@dev.tdt.de> Signed-off-by: Xie He <xie.he.0141@gmail.com> Link: https://lore.kernel.org/r/20201112103506.5875-1-xie.he.0141@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2020-11-24 13:28:58 +01:00
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Kconfig	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
Makefile	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
af_x25.c	net: x25: Increase refcnt of "struct x25_neigh" in x25_rx_call_request	2020-11-24 13:28:58 +01:00
sysctl_net_x25.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
x25_dev.c	net/x25: Fix x25_neigh refcnt leak when receiving frame	2020-04-29 16:33:09 +02:00
x25_facilities.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 41	2019-05-24 17:27:12 +02:00
x25_forward.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 41	2019-05-24 17:27:12 +02:00
x25_in.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 41	2019-05-24 17:27:12 +02:00
x25_link.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 41	2019-05-24 17:27:12 +02:00
x25_out.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 41	2019-05-24 17:27:12 +02:00
x25_proc.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 41	2019-05-24 17:27:12 +02:00
x25_route.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 41	2019-05-24 17:27:12 +02:00
x25_subr.c	net/x25: Fix null-ptr-deref in x25_disconnect	2020-08-05 09:59:44 +02:00
x25_timer.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 41	2019-05-24 17:27:12 +02:00