tetragon: Fix storing of flags and mode for path

[ upstream commit ad5c2b0 ]

Currently we only store first byte of flags and mode from path retrieval,
which ends up with wrong flags and permissions in all arguments that goes
through path retrieval.

fixing it by properly storing the value in argument byte array.

Signed-off-by: Jiri Olsa <[email protected]>

Author: olsajiri

bpf/process/types/basic.h

@@ -375,8 +375,8 @@ FUNC_INLINE long store_path(char *args, char *buffer, const struct path *arg,
 	 * -----------------------------------------
 	 * Next we set up the flags.
 	 */
-	args[size] = (u32)flags;
-	args[size + sizeof(u32)] = (u16)i_mode;
+	*(u32 *)&args[size] = (u32)flags;
+	*(u16 *)&args[size + sizeof(u32)] = (u16)i_mode;
 	size += sizeof(u32) + sizeof(u16); // for the flags + i_mode
 
 	return size;