diff options
author | Johannes Berg <johannes.berg@intel.com> | 2015-12-10 10:37:51 +0100 |
---|---|---|
committer | Johannes Berg <johannes.berg@intel.com> | 2015-12-10 10:37:51 +0100 |
commit | b7bb110008607a915298bf0f47d25886ecb94477 (patch) | |
tree | f024cb45187d06fb2afb5e89ed51f2443595deb8 /net | |
parent | mac80211: fix off-channel mgmt-tx uninitialized variable usage (diff) | |
download | linux-b7bb110008607a915298bf0f47d25886ecb94477.tar.xz linux-b7bb110008607a915298bf0f47d25886ecb94477.zip |
rfkill: copy the name into the rfkill struct
Some users of rfkill, like NFC and cfg80211, use a dynamic name when
allocating rfkill, in those cases dev_name(). Therefore, the pointer
passed to rfkill_alloc() might not be valid forever, I specifically
found the case that the rfkill name was quite obviously an invalid
pointer (or at least garbage) when the wiphy had been renamed.
Fix this by making a copy of the rfkill name in rfkill_alloc().
Cc: stable@vger.kernel.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net')
-rw-r--r-- | net/rfkill/core.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/net/rfkill/core.c b/net/rfkill/core.c index b41e9ea2ffff..f53bf3b6558b 100644 --- a/net/rfkill/core.c +++ b/net/rfkill/core.c @@ -49,7 +49,6 @@ struct rfkill { spinlock_t lock; - const char *name; enum rfkill_type type; unsigned long state; @@ -73,6 +72,7 @@ struct rfkill { struct delayed_work poll_work; struct work_struct uevent_work; struct work_struct sync_work; + char name[]; }; #define to_rfkill(d) container_of(d, struct rfkill, dev) @@ -876,14 +876,14 @@ struct rfkill * __must_check rfkill_alloc(const char *name, if (WARN_ON(type == RFKILL_TYPE_ALL || type >= NUM_RFKILL_TYPES)) return NULL; - rfkill = kzalloc(sizeof(*rfkill), GFP_KERNEL); + rfkill = kzalloc(sizeof(*rfkill) + strlen(name) + 1, GFP_KERNEL); if (!rfkill) return NULL; spin_lock_init(&rfkill->lock); INIT_LIST_HEAD(&rfkill->node); rfkill->type = type; - rfkill->name = name; + strcpy(rfkill->name, name); rfkill->ops = ops; rfkill->data = ops_data; |