From: Cesar Eduardo Barros Date: Sat, 16 Feb 2008 10:41:25 +0000 (-0200) Subject: [CPUFREQ] fix show_trans_table X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=25aca347d49ffc38aa3b7e63ce9b90df7f8b79c8;p=GitHub%2Fmt8127%2Fandroid_kernel_alcatel_ttab.git [CPUFREQ] fix show_trans_table Fix show_trans_table when it overflows PAGE_SIZE. * Not all snprintf calls were protected against being passed a negative length. * When show_trans_table overflows, len might be > PAGE_SIZE. In that case, returns PAGE_SIZE. Signed-off-by: Cesar Eduardo Barros Signed-off-by: Dave Jones --- diff --git a/drivers/cpufreq/cpufreq_stats.c b/drivers/cpufreq/cpufreq_stats.c index 070421a5480e..ef09e069433b 100644 --- a/drivers/cpufreq/cpufreq_stats.c +++ b/drivers/cpufreq/cpufreq_stats.c @@ -114,7 +114,7 @@ show_trans_table(struct cpufreq_policy *policy, char *buf) stat->freq_table[i]); } if (len >= PAGE_SIZE) - return len; + return PAGE_SIZE; len += snprintf(buf + len, PAGE_SIZE - len, "\n"); @@ -131,8 +131,12 @@ show_trans_table(struct cpufreq_policy *policy, char *buf) len += snprintf(buf + len, PAGE_SIZE - len, "%9u ", stat->trans_table[i*stat->max_state+j]); } + if (len >= PAGE_SIZE) + break; len += snprintf(buf + len, PAGE_SIZE - len, "\n"); } + if (len >= PAGE_SIZE) + return PAGE_SIZE; return len; } CPUFREQ_STATDEVICE_ATTR(trans_table,0444,show_trans_table);