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| author | Goldwyn Rodrigues <rgoldwyn@suse.de> | 2011-07-04 09:26:57 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-07-04 15:53:28 -0700 |
| commit | b2bc4782191cb574924a1d09f48083ea8b33a93b (patch) | |
| tree | e91ef7b6fb2869908ce1aa7372747687ad0b5ec3 /drivers | |
| parent | ba466c74d99b91b2f390a09ad31bbc6cddd8cf4b (diff) | |
| download | lwn-b2bc4782191cb574924a1d09f48083ea8b33a93b.tar.gz lwn-b2bc4782191cb574924a1d09f48083ea8b33a93b.zip | |
RDMA: Check for NULL mode in .devnode methods
Commits 71c29bd5c235 ("IB/uverbs: Add devnode method to set path/mode")
and c3af0980ce01 ("IB: Add devnode methods to cm_class and umad_class")
added devnode methods that set the mode.
However, these methods don't check for a NULL mode, and so we get a
crash when unloading modules because devtmpfs_delete_node() calls
device_get_devnode() with mode == NULL.
Add the missing checks.
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.de>
[ Also fix cm.c. - Roland ]
Signed-off-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/infiniband/core/cm.c | 3 | ||||
| -rw-r--r-- | drivers/infiniband/core/uverbs_main.c | 3 |
2 files changed, 4 insertions, 2 deletions
diff --git a/drivers/infiniband/core/cm.c b/drivers/infiniband/core/cm.c index f62f52fb9ece..fc0f2bd9ca82 100644 --- a/drivers/infiniband/core/cm.c +++ b/drivers/infiniband/core/cm.c @@ -3641,7 +3641,8 @@ static struct kobj_type cm_port_obj_type = { static char *cm_devnode(struct device *dev, mode_t *mode) { - *mode = 0666; + if (mode) + *mode = 0666; return kasprintf(GFP_KERNEL, "infiniband/%s", dev_name(dev)); } diff --git a/drivers/infiniband/core/uverbs_main.c b/drivers/infiniband/core/uverbs_main.c index e49a85f8a44d..56898b6578a4 100644 --- a/drivers/infiniband/core/uverbs_main.c +++ b/drivers/infiniband/core/uverbs_main.c @@ -826,7 +826,8 @@ static void ib_uverbs_remove_one(struct ib_device *device) static char *uverbs_devnode(struct device *dev, mode_t *mode) { - *mode = 0666; + if (mode) + *mode = 0666; return kasprintf(GFP_KERNEL, "infiniband/%s", dev_name(dev)); } |