2.6.27-stable review patch. If anyone has any objections, please let us know. ------------------ From: Cedric Hombourger commit 99e3a1eb3c22bb671c6f3d22d8244bfc9fad8185 upstream. While building the kernel, we end-up calling modpost with -K and -M options for the same file (Modules.markers). This is resulting in modpost's main function calling read_markers() and then write_markers() on the same file. We then have read_markers() mmap'ing the file, and writer_markers() opening that same file for writing. The issue is that read_markers() exits without munmap'ing the file and is as a matter holding a reference on Modules.markers. When write_markers() is opening that very same file for writing, we still have a reference on it and cygwin (Windows?) is then making fopen() fail with EPERM. Calling release_file() before exiting read_markers() clears that reference (and memory leak) and fopen() then succeeds. Tested on both cygwin (1.3.22) and Linux. Also ran modpost within valgrind on Linux to make sure that the munmap'ed file was not accessed after read_markers() Signed-off-by: Cedric Hombourger Cc: Signed-off-by: Andrew Morton Signed-off-by: Sam Ravnborg Signed-off-by: Greg Kroah-Hartman --- scripts/mod/modpost.c | 1 + 1 file changed, 1 insertion(+) --- a/scripts/mod/modpost.c +++ b/scripts/mod/modpost.c @@ -1997,6 +1997,7 @@ static void read_markers(const char *fna if (!mod->skip) add_marker(mod, marker, fmt); } + release_file(file, size); return; fail: fatal("parse error in markers list file\n"); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/