From: Tobias Klauser Date: Tue, 24 Jun 2014 13:33:22 +0000 (+0200) Subject: net: filter: Use kcalloc/kmalloc_array to allocate arrays X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=99e72a0fed07d118d329f3046ad2ec2ae9357d63;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git net: filter: Use kcalloc/kmalloc_array to allocate arrays Use kcalloc/kmalloc_array to make it clear we're allocating arrays. No integer overflow can actually happen here, since len/flen is guaranteed to be less than BPF_MAXINSNS (4096). However, this changed makes sure we're not going to get one if BPF_MAXINSNS were ever increased. Signed-off-by: Tobias Klauser Acked-by: Daniel Borkmann Acked-by: Alexei Starovoitov Signed-off-by: David S. Miller --- diff --git a/net/core/filter.c b/net/core/filter.c index 4d13b125ef4b..1dbf6462f766 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -844,7 +844,7 @@ int sk_convert_filter(struct sock_filter *prog, int len, return -EINVAL; if (new_prog) { - addrs = kzalloc(len * sizeof(*addrs), GFP_KERNEL); + addrs = kcalloc(len, sizeof(*addrs), GFP_KERNEL); if (!addrs) return -ENOMEM; } @@ -1101,7 +1101,7 @@ static int check_load_and_stores(struct sock_filter *filter, int flen) BUILD_BUG_ON(BPF_MEMWORDS > 16); - masks = kmalloc(flen * sizeof(*masks), GFP_KERNEL); + masks = kmalloc_array(flen, sizeof(*masks), GFP_KERNEL); if (!masks) return -ENOMEM;