lib/mpi: mpi_read_from_buffer(): sanitize short buffer printk
The first two bytes of the input buffer encode its expected length and
mpi_read_from_buffer() prints a console message if the given buffer is too
short.
However, there are some oddities with how this message is printed:
- It is printed at the default loglevel. This is different from the
one used in the case that the first two bytes' value is unsupportedly
large, i.e. KERN_INFO.
- The format specifier '%d' is used for unsigned ints.
- It prints the values of nread and *ret_nread. This is redundant since
the former is always the latter + 1.
Clean this up as follows:
- Use pr_info() rather than printk() with no loglevel.
- Use the format specifiers '%u' in place if '%d'.
- Do not print the redundant 'nread' but the more helpful 'nbytes' value.
Signed-off-by: Nicolai Stange <nicstange@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/lib/mpi/mpicoder.c b/lib/mpi/mpicoder.c
index 9c6f6b9..f4f9e33 100644
--- a/lib/mpi/mpicoder.c
+++ b/lib/mpi/mpicoder.c
@@ -97,8 +97,8 @@
nbytes = DIV_ROUND_UP(nbits, 8);
if (nbytes + 2 > *ret_nread) {
- printk("MPI: mpi larger than buffer nread=%d ret_nread=%d\n",
- *ret_nread + 1, *ret_nread);
+ pr_info("MPI: mpi larger than buffer nbytes=%u ret_nread=%u\n",
+ nbytes, *ret_nread);
return ERR_PTR(-EINVAL);
}