On Mon, Feb 03, 2025 at 06:01:59PM +0100, Peter Seiderer wrote: > Honour the user given buffer size for the hex32_arg(), num_arg(), > strn_len(), get_imix_entries() and get_labels() calls (otherwise they will > access memory outside of the user given buffer). > > In hex32_arg(), num_arg(), strn_len() error out in case no characters are > available (maxlen = 0), in num_arg() additional error out in case no valid > character is parsed. > > In get_labels() additional enable parsing labels up to MAX_IMIX_ENTRIES > instead of (MAX_IMIX_ENTRIES - 1). > > Additional remove some superfluous variable initializing and align some > variable declarations to the most common pattern. > > Signed-off-by: Peter Seiderer <ps.report@xxxxxxx> ... > diff --git a/net/core/pktgen.c b/net/core/pktgen.c ... > @@ -872,7 +886,8 @@ static ssize_t get_imix_entries(const char __user *buffer, > if (size < 14 + 20 + 8) > size = 14 + 20 + 8; > > - len = num_arg(&buffer[i], max_digits, &weight); > + max = min(10, maxlen - i); Hi Peter, 10 is used as a magic value here. I think it would be best if it were a #define so it has a name. Likewise for other constants used as arguments to min() in this patch. ...
