Fix bug for missing files in /proc/driver/nvidia

If one of the files (params, version, registry) in /proc/driver/nvidia
is missing the path for the next file is concatenated on the previous one.

This change ensures that the string storing the path is reset if one of
the files is not found.

Signed-off-by: Evan Lezar <[email protected]>

Author: elezar

pkg/deb/changelog

@@ -1,7 +1,8 @@
 libnvidia-container (1.6.0~rc.2-1) experimental; urgency=medium
 
- -- NVIDIA CORPORATION <[email protected]>  Tue, 26 Oct 2021 12:24:22 +0200
+  * Fix bug that lead to unexected mount error when /proc/driver/nvidia does not exist on the host
 
+ -- NVIDIA CORPORATION <[email protected]>  Tue, 26 Oct 2021 12:24:22 +0200
 
 libnvidia-container (1.6.0~rc.1-1) experimental; urgency=medium
 

pkg/rpm/SPECS/libnvidia-container.spec

@@ -100,6 +100,7 @@ This package contains command-line tools that facilitate using the library.
 
 %changelog
 * Tue Oct 26 2021  NVIDIA CORPORATION <[email protected]> 1.6.0-0.1.rc.2
+- Fix bug that lead to unexected mount error when /proc/driver/nvidia does not exist on the host
 
 * Mon Sep 20 2021  NVIDIA CORPORATION <[email protected]> 1.6.0-0.1.rc.1
 - Add AARCH64 package for Amazon Linux 2

src/nvc_mount.c

@@ -351,8 +351,14 @@ mount_procfs(struct error *err, const char *root, const struct nvc_container *cn
                 if (path_append(err, dst, files[i]) < 0)
                         goto fail;
                 if (file_mode(err, src, &mode) < 0) {
-                        if (err->code == ENOENT)
+                        if (err->code == ENOENT) {
+                                log_warnf("%s not found; skipping", src);
+                                // We reset the strings to ensure that the paths are
+                                // not concatenated if one of the files is not found.
+                                *src_end = '\0';
+                                *dst_end = '\0';
                                 continue;
+                        }
                         goto fail;
                 }
                 if (file_read_text(err, src, &buf) < 0)