Kernel: Fix SMAP violation in join_thread()

awesomekling · awesomekling · commit 200459d644c3 · 2020-01-08T15:21:05.000+01:00
diff --git a/Kernel/Process.cpp b/Kernel/Process.cpp
@@ -3370,7 +3370,7 @@ int Process::sys$join_thread(int tid, void** exit_value)
     thread = nullptr;
 
     if (exit_value)
-        *exit_value = joinee_exit_value;
+        copy_to_user(exit_value, &joinee_exit_value, sizeof(joinee_exit_value));
     return 0;
 }
 

Original file line number	Diff line number	Diff line change
`@@ -3370,7 +3370,7 @@ int Process::sys$join_thread(int tid, void** exit_value)`
`3370`	`3370`	`thread = nullptr;`
`3371`	`3371`
`3372`	`3372`	`if (exit_value)`
`3373`		`- *exit_value = joinee_exit_value;`
	`3373`	`+ copy_to_user(exit_value, &joinee_exit_value, sizeof(joinee_exit_value));`
`3374`	`3374`	`return 0;`
`3375`	`3375`	`}`
`3376`	`3376`