diff options
| author | Farhan Ali <alifm@linux.ibm.com> | 2019-07-11 17:28:52 +0300 |
|---|---|---|
| committer | Cornelia Huck <cohuck@redhat.com> | 2019-07-15 15:15:37 +0300 |
| commit | 8b515be512a2435bb8aedc6390cbe140167f9eb9 (patch) | |
| tree | 6b9f6372e4f1060ba3d5b068986798f4893259c3 /drivers | |
| parent | c9f597a4d6d7a01590571291f659a2f146111e34 (diff) | |
| download | linux-8b515be512a2435bb8aedc6390cbe140167f9eb9.tar.xz | |
vfio-ccw: Fix memory leak and don't call cp_free in cp_init
We don't set cp->initialized to true so calling cp_free
will just return and not do anything.
Also fix a memory leak where we fail to free a ccwchain
on an error.
Fixes: 812271b910 ("s390/cio: Squash cp_free() and cp_unpin_free()")
Signed-off-by: Farhan Ali <alifm@linux.ibm.com>
Message-Id: <3173c4216f4555d9765eb6e4922534982bc820e4.1562854091.git.alifm@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Eric Farman <farman@linux.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/s390/cio/vfio_ccw_cp.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/drivers/s390/cio/vfio_ccw_cp.c b/drivers/s390/cio/vfio_ccw_cp.c index 46967c664c0f..e4e8724eddaa 100644 --- a/drivers/s390/cio/vfio_ccw_cp.c +++ b/drivers/s390/cio/vfio_ccw_cp.c @@ -421,7 +421,7 @@ static int ccwchain_loop_tic(struct ccwchain *chain, static int ccwchain_handle_ccw(u32 cda, struct channel_program *cp) { struct ccwchain *chain; - int len; + int len, ret; /* Copy 2K (the most we support today) of possible CCWs */ len = copy_from_iova(cp->mdev, cp->guest_cp, cda, @@ -448,7 +448,12 @@ static int ccwchain_handle_ccw(u32 cda, struct channel_program *cp) memcpy(chain->ch_ccw, cp->guest_cp, len * sizeof(struct ccw1)); /* Loop for tics on this new chain. */ - return ccwchain_loop_tic(chain, cp); + ret = ccwchain_loop_tic(chain, cp); + + if (ret) + ccwchain_free(chain); + + return ret; } /* Loop for TICs. */ @@ -642,8 +647,6 @@ int cp_init(struct channel_program *cp, struct device *mdev, union orb *orb) /* Build a ccwchain for the first CCW segment */ ret = ccwchain_handle_ccw(orb->cmd.cpa, cp); - if (ret) - cp_free(cp); if (!ret) { cp->initialized = true; |