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cfg80211: fix NULL pointer derference when querying regdb 

Some drivers may call this function when regdb is not initialized yet,
so we need to make sure regdb is valid before trying to access it.

Make sure regdb is initialized before trying to access it in
reg_query_regdb_wmm() and query_regdb().

Reported-by: Eric Biggers <ebiggers3@gmail.com>
Signed-off-by: Haim Dreyfuss <haim.dreyfuss@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Haim Dreyfuss 2018-05-21 23:34:57 +03:00 committed by Johannes Berg
parent 1d6741d864
commit 5247a77ced
1 changed files with 3 additions and 0 deletions
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3
net/wireless/reg.c
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@ -916,6 +916,9 @@ int reg_query_regdb_wmm(char *alpha2, int freq, u32 *dbptr,
const struct fwdb_header *hdr = regdb;
const struct fwdb_country *country;
if (!regdb)
return -ENODATA;
if (IS_ERR(regdb))
return PTR_ERR(regdb);