f35d12971b
x25_lapb_receive_frame() invokes x25_get_neigh(), which returns a
reference of the specified x25_neigh object to "nb" with increased
refcnt.
When x25_lapb_receive_frame() returns, local variable "nb" becomes
invalid, so the refcount should be decreased to keep refcount balanced.
The reference counting issue happens in one path of
x25_lapb_receive_frame(). When pskb_may_pull() returns false, the
function forgets to decrease the refcnt increased by x25_get_neigh(),
causing a refcnt leak.
Fix this issue by calling x25_neigh_put() when pskb_may_pull() returns
false.
Fixes: cb101ed2c3c7 ("x25: Handle undersized/fragmented skbs")
Signed-off-by: Xiyu Yang <xiyuyang19@fudan.edu.cn>
Signed-off-by: Xin Tan <tanxin.ctf@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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|---|---|---|
| .. | ||
| af_x25.c | ||
| Kconfig | ||
| Makefile | ||
| sysctl_net_x25.c | ||
| x25_dev.c | ||
| x25_facilities.c | ||
| x25_forward.c | ||
| x25_in.c | ||
| x25_link.c | ||
| x25_out.c | ||
| x25_proc.c | ||
| x25_route.c | ||
| x25_subr.c | ||
| x25_timer.c | ||