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authorNicolai Stange <nicstange@gmail.com>2016-05-27 00:19:54 +0300
committerHerbert Xu <herbert@gondor.apana.org.au>2016-05-31 11:42:00 +0300
commitcdf24b42c6740ec429e85a8405e5e917abac8595 (patch)
tree04a20f3b24b3efac01968f554a9eee23f9ba53c5
parent7af791e0f0d00c14f01ba2ffe3b6e2b50a35fc6f (diff)
downloadlinux-cdf24b42c6740ec429e85a8405e5e917abac8595.tar.xz
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>
-rw-r--r--lib/mpi/mpicoder.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/lib/mpi/mpicoder.c b/lib/mpi/mpicoder.c
index 9c6f6b986682..f4f9e3396f3e 100644
--- a/lib/mpi/mpicoder.c
+++ b/lib/mpi/mpicoder.c
@@ -97,8 +97,8 @@ MPI mpi_read_from_buffer(const void *xbuffer, unsigned *ret_nread)
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);
}