From: Suraj Jitindar Singh Date: Wed, 5 Sep 2018 02:09:51 +0000 (+1000) Subject: powerpc/pseries: Remove VLA from lparcfg_write() X-Git-Tag: v4.20-rc1~97^2~179 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=74422e2b19391e0bb9f11b0ab4522bbf7f93c4ba;p=linux.git powerpc/pseries: Remove VLA from lparcfg_write() In lparcfg_write we hard code kbuf_sz and then use this as the variable length of kbuf creating a variable length array. Since we're hard coding the length anyway just define the array using this as the length and remove the need for kbuf_sz, thus removing the variable length array. Signed-off-by: Suraj Jitindar Singh Reviewed-by: Joel Stanley Signed-off-by: Michael Ellerman --- diff --git a/arch/powerpc/platforms/pseries/lparcfg.c b/arch/powerpc/platforms/pseries/lparcfg.c index 7c872dc01bdb..8bd590af488a 100644 --- a/arch/powerpc/platforms/pseries/lparcfg.c +++ b/arch/powerpc/platforms/pseries/lparcfg.c @@ -585,8 +585,7 @@ static ssize_t update_mpp(u64 *entitlement, u8 *weight) static ssize_t lparcfg_write(struct file *file, const char __user * buf, size_t count, loff_t * off) { - int kbuf_sz = 64; - char kbuf[kbuf_sz]; + char kbuf[64]; char *tmp; u64 new_entitled, *new_entitled_ptr = &new_entitled; u8 new_weight, *new_weight_ptr = &new_weight; @@ -595,7 +594,7 @@ static ssize_t lparcfg_write(struct file *file, const char __user * buf, if (!firmware_has_feature(FW_FEATURE_SPLPAR)) return -EINVAL; - if (count > kbuf_sz) + if (count > sizeof(kbuf)) return -EINVAL; if (copy_from_user(kbuf, buf, count))