[PATCH 0/1] MR8241: dbghelp: Avoid use after free by moving assignment before vector_add (ASan).

[Bernhard Übelacker (＠bernhardu)]

Followup to 5c54087c47.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=58340
Co-authored-by: Eric Pouech

[PATCH 1/1] dbghelp: Avoid use after free by moving assignment before vector_add (ASan).

[Bernhard Übelacker]

From: Bernhard Übelacker

Followup to 5c54087c47.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=58340
Co-authored-by: Eric Pouech 
---
 dlls/dbghelp/symbol.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/dlls/dbghelp/symbol.c b/dlls/dbghelp/symbol.c
index f051fa793ff..29a32ad7dcf 100644
--- a/dlls/dbghelp/symbol.c
+++ b/dlls/dbghelp/symbol.c
@@ -432,6 +432,8 @@ void symt_add_func_line(struct module* module, struct symt_function* func,
         WARN("Duplicate addition of line number in %s\n", debugstr_a(func->hash_elt.name));
         return;
     }
+    /* clear previous last */
+    if (prev) prev->is_last = 0;
     if (!last_matches)
     {
         /* we shouldn't have line changes on first line of function */
@@ -442,8 +444,6 @@ void symt_add_func_line(struct module* module, struct symt_function* func,
         dli->line_number    = 0;
         dli->u.source_file  = source_idx;
     }
-    /* clear previous last */
-    if (prev) prev->is_last = 0;
     dli = vector_add(&func->vlines, &module->pool);
     dli->is_source_file = 0;
     dli->is_first       = 0; /* only a source file can be first */

[PATCH 0/1] MR8241: dbghelp: Avoid use after free by moving assignment before vector_add (ASan). - approved

[eric pouech (＠epo)]

This merge request was approved by eric pouech.