[reactos] 09/179: [WINESYNC] dbghelp: Detect ELF architecture before reading the whole header.

[winesync]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=7adbd03d5fcd936e93a93…

commit 7adbd03d5fcd936e93a939240b131ba487605b4b
Author:     winesync <ros-dev(a)reactos.org>
AuthorDate: Fri Sep 11 13:00:07 2020 +0200
Commit:     Jérôme Gardou <jerome.gardou(a)reactos.org>
CommitDate: Wed Sep 16 10:35:31 2020 +0200

    [WINESYNC] dbghelp: Detect ELF architecture before reading the whole header.
    
    Signed-off-by: Zebediah Figura <zfigura(a)codeweavers.com>
    Signed-off-by: Alexandre Julliard <julliard(a)winehq.org>
    
    wine commit id a612f1f56fefd00ebe6d8f7bcf7c826f5aa85eab by Zebediah Figura
<zfigura(a)codeweavers.com>
---
 dll/win32/dbghelp/elf_module.c | 14 ++++++++++----
 sdk/tools/winesync/dbghelp.cfg |  2 +-
 2 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/dll/win32/dbghelp/elf_module.c b/dll/win32/dbghelp/elf_module.c
index e4689a71b1e..d0b483abbcf 100644
--- a/dll/win32/dbghelp/elf_module.c
+++ b/dll/win32/dbghelp/elf_module.c
@@ -307,6 +307,7 @@ static BOOL elf_map_file(struct elf_map_file_data* emfd, struct
image_file_map*
     char*               filename;
     unsigned            len;
     BOOL                ret = FALSE;
+    unsigned char e_ident[EI_NIDENT];
 
     switch (emfd->kind)
     {
@@ -340,14 +341,19 @@ static BOOL elf_map_file(struct elf_map_file_data* emfd, struct
image_file_map*
     case from_process:
         break;
     }
-    if (!elf_map_file_read(fmap, emfd, &fmap->u.elf.elfhdr,
sizeof(fmap->u.elf.elfhdr), 0))
+
+    if (!elf_map_file_read(fmap, emfd, e_ident, sizeof(e_ident), 0))
         goto done;
 
     /* and check for an ELF header */
-    if (memcmp(fmap->u.elf.elfhdr.e_ident,
-               elf_signature, sizeof(elf_signature))) goto done;
+    if (memcmp(e_ident, elf_signature, sizeof(elf_signature)))
+        goto done;
+
+    fmap->addr_size = e_ident[EI_CLASS] == ELFCLASS64 ? 64 : 32;
+
+    if (!elf_map_file_read(fmap, emfd, &fmap->u.elf.elfhdr,
sizeof(fmap->u.elf.elfhdr), 0))
+        goto done;
 
-    fmap->addr_size = fmap->u.elf.elfhdr.e_ident[EI_CLASS] == ELFCLASS64 ? 64 :
32;
     fmap->u.elf.sect = HeapAlloc(GetProcessHeap(), 0,
                                  fmap->u.elf.elfhdr.e_shnum *
sizeof(fmap->u.elf.sect[0]));
     if (!fmap->u.elf.sect) goto done;
diff --git a/sdk/tools/winesync/dbghelp.cfg b/sdk/tools/winesync/dbghelp.cfg
index e58d3a96f88..95dc6bc4fb4 100644
--- a/sdk/tools/winesync/dbghelp.cfg
+++ b/sdk/tools/winesync/dbghelp.cfg
@@ -3,4 +3,4 @@ directories:
 files:
   include/dbghelp.h: sdk/include/psdk/dbghelp.h
 tags:
-  wine: c2c0e4fe510f75c757e5dbdc1b727a7c9f3d6f33
+  wine: a612f1f56fefd00ebe6d8f7bcf7c826f5aa85eab