diff options
| author | Henrik Rydberg <rydberg@euromail.se> | 2012-06-07 04:54:29 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-07-16 09:03:50 -0700 |
| commit | 684f49c63edb17b18b8ffc84495e0b0aacc8f4ad (patch) | |
| tree | 6356ea6c2fdb0a238492dd6ea4e339fbb984378a | |
| parent | 6ee6b4d65c65a006b54b2f8f0aee405b1e01e2b2 (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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -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 f082e48ab11..70d62f5bc90 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); |