wininet: Prevent use after free in logging.

Make logs which show values that are unmapped by cache_container_unlock_index() go before it's called. Signed-off-by: Jan Sikorski <jsikorski@codeweavers.com> Signed-off-by: Alexandre Julliard <julliard@winehq.org>

wininet: Prevent use after free in logging.
bcdb58cc · Jan Sikorski · Alexandre Julliard · b7f14a97 · bcdb58cc
Commit bcdb58cc authored Oct 30, 2020 by Jan Sikorski Committed by Alexandre Julliard Nov 02, 2020
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Showing with 4 additions and 4 deletions

urlcache.c dlls/wininet/urlcache.c +4 -4

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--- a/dlls/wininet/urlcache.c
+++ b/dlls/wininet/urlcache.c
@@ -1808,9 +1808,9 @@ static BOOL urlcache_get_entry_info(const char *url, void *entry_info,
    url_entry = (const entry_url*)((LPBYTE)header + hash_entry->offset);
    if(url_entry->header.signature != URL_SIGNATURE) {
-        cache_container_unlock_index(container, header);
        FIXME("Trying to retrieve entry of unknown format %s\n",
                debugstr_an((LPCSTR)&url_entry->header.signature, sizeof(DWORD)));
+        cache_container_unlock_index(container, header);
        SetLastError(ERROR_FILE_NOT_FOUND);
        return FALSE;
    }
@@ -2041,8 +2041,8 @@ BOOL WINAPI SetUrlCacheEntryInfoA(LPCSTR lpszUrlName,
    pEntry = (entry_header*)((LPBYTE)pHeader + pHashEntry->offset);
    if (pEntry->signature != URL_SIGNATURE)
    {
-        cache_container_unlock_index(pContainer, pHeader);
        FIXME("Trying to retrieve entry of unknown format %s\n", debugstr_an((LPSTR)&pEntry->signature, sizeof(DWORD)));
+        cache_container_unlock_index(pContainer, pHeader);
        SetLastError(ERROR_FILE_NOT_FOUND);
        return FALSE;
    }
@@ -2111,9 +2111,9 @@ static BOOL urlcache_entry_get_file(const char *url, void *entry_info, DWORD *si
    url_entry = (entry_url*)((LPBYTE)header + hash_entry->offset);
    if(url_entry->header.signature != URL_SIGNATURE) {
-        cache_container_unlock_index(container, header);
        FIXME("Trying to retrieve entry of unknown format %s\n",
                debugstr_an((LPSTR)&url_entry->header.signature, sizeof(DWORD)));
+        cache_container_unlock_index(container, header);
        SetLastError(ERROR_FILE_NOT_FOUND);
        return FALSE;
    }
@@ -4004,9 +4004,9 @@ BOOL WINAPI IsUrlCacheEntryExpiredA(LPCSTR url, DWORD dwFlags, FILETIME* pftLast
    pEntry = (const entry_header*)((LPBYTE)pHeader + pHashEntry->offset);
    if (pEntry->signature != URL_SIGNATURE)
    {
+        FIXME("Trying to retrieve entry of unknown format %s\n", debugstr_an((LPCSTR)&pEntry->signature, sizeof(DWORD)));
        cache_container_unlock_index(pContainer, pHeader);
        memset(pftLastModified, 0, sizeof(*pftLastModified));
-        FIXME("Trying to retrieve entry of unknown format %s\n", debugstr_an((LPCSTR)&pEntry->signature, sizeof(DWORD)));
        return TRUE;
    }