diff options
| author | Henrik Rydberg <rydberg@euromail.se> | 2012-06-07 04:54:29 -0400 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2012-07-04 05:44:08 +0100 |
| commit | 51b9f4cbf489c79d02e835f8b0819bb5f86f3660 (patch) | |
| tree | e0d61d75a9ce2ea1ba452394182cd89790ea34a8 | |
| parent | d01f95936e0c3902197307e6e62c2673fa629bf4 (diff) | |
hwmon: (applesmc) Limit key length in warning messages
commit ac852edb47b15900886ba2564eeeb13b3b526e3e upstream.
Key lookups may call read_smc() with a fixed-length key string,
and if the lookup fails, trailing stack content may appear in the
kernel log. Fixed with this patch.
Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
| -rw-r--r-- | drivers/hwmon/applesmc.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/hwmon/applesmc.c b/drivers/hwmon/applesmc.c index 4c0743660e9..d99aa848477 100644 --- a/drivers/hwmon/applesmc.c +++ b/drivers/hwmon/applesmc.c @@ -215,7 +215,7 @@ static int read_smc(u8 cmd, const char *key, u8 *buffer, u8 len) int i; if (send_command(cmd) || send_argument(key)) { - pr_warn("%s: read arg fail\n", key); + pr_warn("%.4s: read arg fail\n", key); return -EIO; } @@ -223,7 +223,7 @@ static int read_smc(u8 cmd, const char *key, u8 *buffer, u8 len) for (i = 0; i < len; i++) { if (__wait_status(0x05)) { - pr_warn("%s: read data fail\n", key); + pr_warn("%.4s: read data fail\n", key); return -EIO; } buffer[i] = inb(APPLESMC_DATA_PORT); |