diff mbox series

[RFC,v5,09/28] dyndbg: accept null site in dynamic_emit_prefix

Message ID 20210511185057.3815777-10-jim.cromie@gmail.com (mailing list archive)
State New
Headers show
Series dynamic debug diet plan | expand

Commit Message

Jim Cromie May 11, 2021, 6:50 p.m. UTC
2 prints use site->member, protect them with if site.

no functional changes.

Signed-off-by: Jim Cromie <jim.cromie@gmail.com>
---
 lib/dynamic_debug.c | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)
diff mbox series

Patch

diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c
index fa89d69dad4e..fb8547feb061 100644
--- a/lib/dynamic_debug.c
+++ b/lib/dynamic_debug.c
@@ -629,15 +629,19 @@  static char *__dynamic_emit_prefix(const struct _ddebug *dp, char *buf)
 					task_pid_vnr(current));
 	}
 	pos_after_tid = pos;
-	if (dp->flags & _DPRINTK_FLAGS_INCL_MODNAME)
-		pos += snprintf(buf + pos, remaining(pos), "%s:",
-				desc->modname);
-	if (dp->flags & _DPRINTK_FLAGS_INCL_FUNCNAME)
-		pos += snprintf(buf + pos, remaining(pos), "%s:",
-				desc->function);
+
+	if (desc) {
+		if (dp->flags & _DPRINTK_FLAGS_INCL_MODNAME)
+			pos += snprintf(buf + pos, remaining(pos), "%s:",
+					desc->modname);
+		if (dp->flags & _DPRINTK_FLAGS_INCL_FUNCNAME)
+			pos += snprintf(buf + pos, remaining(pos), "%s:",
+					desc->function);
+	}
 	if (dp->flags & _DPRINTK_FLAGS_INCL_LINENO)
 		pos += snprintf(buf + pos, remaining(pos), "%d:",
 				dp->lineno);
+
 	if (pos - pos_after_tid)
 		pos += snprintf(buf + pos, remaining(pos), " ");
 	if (pos >= PREFIX_SIZE)