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| author |   Stefano Stabellini <sstabellini@kernel.org> | 2018-12-21 15:06:30 -0800 |
|---|---|---|
| committer |   Boris Ostrovsky <boris.ostrovsky@oracle.com> | 2019-01-02 11:00:10 -0500 |
| commit | 96283f9a084e23d7cda2d3c5d1ffa6df6cf1ecec (patch) | |
| tree | fe0a1cbbe09216545c426d7743f954feff8c07a3 /drivers/xen/pvcalls-front.c | |
| parent | pvcalls-front: read all data before closing the connection (diff) | |
| download | linux-dev-96283f9a084e23d7cda2d3c5d1ffa6df6cf1ecec.tar.xz linux-dev-96283f9a084e23d7cda2d3c5d1ffa6df6cf1ecec.zip | |
pvcalls-front: don't try to free unallocated rings
inflight_req_id is 0 when initialized. If inflight_req_id is 0, there is
no accept_map to free. Fix the check in pvcalls_front_release.
Signed-off-by: Stefano Stabellini <stefanos@xilinx.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Diffstat (limited to 'drivers/xen/pvcalls-front.c')
| -rw-r--r-- | drivers/xen/pvcalls-front.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/xen/pvcalls-front.c b/drivers/xen/pvcalls-front.c index e5d95aab2cb8..4f3d664b3f39 100644 --- a/drivers/xen/pvcalls-front.c +++ b/drivers/xen/pvcalls-front.c @@ -1030,8 +1030,8 @@ int pvcalls_front_release(struct socket *sock) spin_lock(&bedata->socket_lock); list_del(&map->list); spin_unlock(&bedata->socket_lock); - if (READ_ONCE(map->passive.inflight_req_id) != - PVCALLS_INVALID_ID) { + if (READ_ONCE(map->passive.inflight_req_id) != PVCALLS_INVALID_ID && + READ_ONCE(map->passive.inflight_req_id) != 0) { pvcalls_front_free_map(bedata, map->passive.accept_map); } |