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| author |   Xiyu Yang <xiyuyang19@fudan.edu.cn> | 2020-04-25 20:54:37 +0800 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2020-04-27 11:17:16 -0700 |
| commit | 095f5614bfe16e5b3e191b34ea41b10d6fdd4ced (patch) | |
| tree | a5468ac927f1ac27565b6da62f24d080eb95126e /net/x25/x25_subr.c | |
| parent | aquantia: Fix the media type of AQC100 ethernet controller in the driver (diff) | |
| download | linux-dev-095f5614bfe16e5b3e191b34ea41b10d6fdd4ced.tar.xz linux-dev-095f5614bfe16e5b3e191b34ea41b10d6fdd4ced.zip | |
net/tls: Fix sk_psock refcnt leak in bpf_exec_tx_verdict()
bpf_exec_tx_verdict() invokes sk_psock_get(), which returns a reference
of the specified sk_psock object to "psock" with increased refcnt.
When bpf_exec_tx_verdict() returns, local variable "psock" becomes
invalid, so the refcount should be decreased to keep refcount balanced.
The reference counting issue happens in one exception handling path of
bpf_exec_tx_verdict(). When "policy" equals to NULL but "psock" is not
NULL, the function forgets to decrease the refcnt increased by
sk_psock_get(), causing a refcnt leak.
Fix this issue by calling sk_psock_put() on this error path before
bpf_exec_tx_verdict() returns.
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>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions