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| author | Henrik Rydberg <rydberg@euromail.se> | 2012-06-07 04:54:29 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-07-16 08:47:38 -0700 |
| commit | cd2ae436c3ef59659ba10754213c8614d256dc86 (patch) | |
| tree | d68e8c422e27238b85f5e5743bb422384af48098 /drivers/hwmon | |
| parent | c5a07578befc10cde568f54a2103ad4273ef98c1 (diff) | |
| download | lwn-cd2ae436c3ef59659ba10754213c8614d256dc86.tar.gz lwn-cd2ae436c3ef59659ba10754213c8614d256dc86.zip | |
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>
Diffstat (limited to 'drivers/hwmon')
| -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 4c0743660e9c..d99aa8484777 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); |