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authorDan Carpenter <dan.carpenter@oracle.com>2016-10-14 09:34:18 +0200
committerJon Mason <jdmason@kudzu.us>2016-11-13 22:48:30 +0100
commit819baf885953b588b63bef28e5598daf9ed4ddf9 (patch)
treec4c576acfae821524f886b7f12841f9168ffa6ff /drivers/ntb/test
parentntb: ntb_hw_intel: init peer_addr in struct intel_ntb_dev (diff)
downloadlinux-819baf885953b588b63bef28e5598daf9ed4ddf9.tar.xz
linux-819baf885953b588b63bef28e5598daf9ed4ddf9.zip
ntb_perf: potential info leak in debugfs
This is a static checker warning, not something I'm desperately concerned about. But snprintf() returns the number of bytes that would have been copied if there were space. We really care about the number of bytes that actually were copied so we should use scnprintf() instead. It probably won't overrun, and in that case we may as well just use sprintf() but these sorts of things make static checkers and code reviewers happier. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
Diffstat (limited to 'drivers/ntb/test')
-rw-r--r--drivers/ntb/test/ntb_perf.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/ntb/test/ntb_perf.c b/drivers/ntb/test/ntb_perf.c
index e065b695200d..e75d4fdc0866 100644
--- a/drivers/ntb/test/ntb_perf.c
+++ b/drivers/ntb/test/ntb_perf.c
@@ -589,7 +589,7 @@ static ssize_t debugfs_run_read(struct file *filp, char __user *ubuf,
return -ENOMEM;
if (mutex_is_locked(&perf->run_mutex)) {
- out_off = snprintf(buf, 64, "running\n");
+ out_off = scnprintf(buf, 64, "running\n");
goto read_from_buf;
}
@@ -600,14 +600,14 @@ static ssize_t debugfs_run_read(struct file *filp, char __user *ubuf,
break;
if (pctx->status) {
- out_off += snprintf(buf + out_off, 1024 - out_off,
+ out_off += scnprintf(buf + out_off, 1024 - out_off,
"%d: error %d\n", i,
pctx->status);
continue;
}
rate = div64_u64(pctx->copied, pctx->diff_us);
- out_off += snprintf(buf + out_off, 1024 - out_off,
+ out_off += scnprintf(buf + out_off, 1024 - out_off,
"%d: copied %llu bytes in %llu usecs, %llu MBytes/s\n",
i, pctx->copied, pctx->diff_us, rate);
}