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| author | Henrik Rydberg <rydberg@euromail.se> | 2012-06-07 10:54:29 +0200 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2012-06-18 17:48:00 +0200 |
| commit | ac852edb47b15900886ba2564eeeb13b3b526e3e (patch) | |
| tree | 90cb765f808e48f7b956a0e979b99b0c4f44e3b3 | |
| parent | Linux 3.5-rc3 (diff) | |
| download | linux-ac852edb47b15900886ba2564eeeb13b3b526e3e.tar.xz linux-ac852edb47b15900886ba2564eeeb13b3b526e3e.zip | |
hwmon: (applesmc) Limit key length in warning messages
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>
Cc: stable@vger.kernel.org
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
| -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 f082e48ab113..70d62f5bc909 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); |