Rémi Bernon : winedbg: Don't dereference possibly NULL thread pointer.

[Alexandre Julliard]

Module: wine
Branch: stable
Commit: 75158894700090e7867132e787a6778089619962
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=75158894700090e7867132e78...

Author: Rémi Bernon 
Date:   Tue Mar  9 22:54:55 2021 +0100

winedbg: Don't dereference possibly NULL thread pointer.

Signed-off-by: Rémi Bernon 
Signed-off-by: Alexandre Julliard 
(cherry picked from commit 6eff0342ad6f8c262112e6aeb083bb386d37cf04)
Signed-off-by: Michael Stefaniuc

---

programs/winedbg/gdbproxy.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/programs/winedbg/gdbproxy.c b/programs/winedbg/gdbproxy.c
index c51fd342496..392502032e8 100644
--- a/programs/winedbg/gdbproxy.c
+++ b/programs/winedbg/gdbproxy.c
@@ -111,11 +111,11 @@ struct gdb_context
 static void gdbctx_delete_xpoint(struct gdb_context *gdbctx, struct dbg_thread *thread,
                                  dbg_ctx_t *ctx, struct gdb_xpoint *x)
 {
-    struct dbg_process *process = thread->process;
+    struct dbg_process *process = gdbctx->process;
     struct backend_cpu *cpu = process->be_cpu;

if (!cpu->remove_Xpoint(process->handle, process->process_io, ctx, x->type, x->addr, x->value, x->size))
-        ERR("%04x:%04x: Couldn't remove breakpoint at:%p/%x type:%d\n", process->pid, thread->tid, x->addr, x->size, x->type);
+        ERR("%04x:%04x: Couldn't remove breakpoint at:%p/%x type:%d\n", process->pid, thread ? thread->tid : ~0, x->addr, x->size, x->type);

list_remove(&x->entry);
     HeapFree(GetProcessHeap(), 0, x);