Re: [libvirt] [PATCH 04/10] storage: avoid memory leak on stat failure

Spotted by coverity. Triggers on failed stat, although I'm not sure how easy that condition is, so I'm not sure if this is a runtime memory hog. Regression introduced in commit 8077d64 (unreleased). * src/util/storage_file.c (virStorageFileGetMetadataFromFD): Reduce need for malloc, avoiding a leak. --- src/util/storage_file.c | 15 +++++++-------- 1 files changed, 7 insertions(+), 8 deletions(-) diff --git a/src/util/storage_file.c b/src/util/storage_file.c index 8dbd933..6b3b756 100644 --- a/src/util/storage_file.c +++ b/src/util/storage_file.c @@ -831,11 +831,6 @@ virStorageFileGetMetadataFromFD(const char *path, int ret = -1; struct stat sb; - if (VIR_ALLOC_N(head, len) < 0) { - virReportOOMError(); - return -1; - } - memset(meta, 0, sizeof (*meta)); if (fstat(fd, &sb) < 0) { @@ -847,13 +842,17 @@ virStorageFileGetMetadataFromFD(const char *path, /* No header to probe for directories */ if (S_ISDIR(sb.st_mode)) { - ret = 0; - goto cleanup; + return 0; } if (lseek(fd, 0, SEEK_SET) == (off_t)-1) { virReportSystemError(errno, _("cannot seek to start of '%s'"), path); - goto cleanup; + return -1; + } + + if (VIR_ALLOC_N(head, len) < 0) { + virReportOOMError(); + return -1; } if ((len = read(fd, head, len)) < 0) {