diff mbox series

[net-next,v3,1/4] netconsole: Warn if MAX_USERDATA_ITEMS limit is exceeded

Message ID 20250108-netcons_overflow_test-v3-1-3d85eb091bec@debian.org (mailing list archive)
State New
Headers show
Series netconsole: selftest for userdata overflow | expand

Commit Message

Breno Leitao Jan. 8, 2025, 11:50 a.m. UTC 
netconsole configfs helpers doesn't allow the creation of more than
MAX_USERDATA_ITEMS items.

Add a warning when netconsole userdata update function attempts sees
more than MAX_USERDATA_ITEMS entries.

Replace silent ignore mechanism with WARN_ON_ONCE() to highlight
potential misuse during development and debugging.

Signed-off-by: Breno Leitao <leitao@debian.org>
Reviewed-by: Simon Horman <horms@kernel.org>
---
 drivers/net/netconsole.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/net/netconsole.c b/drivers/net/netconsole.c
index f422a2f666ef2276cf5b10e1dbc6badbc8ef0038..86ab4a42769a49eebe5dd6f01dafafc6c86ec54f 100644
--- a/drivers/net/netconsole.c
+++ b/drivers/net/netconsole.c
@@ -730,7 +730,7 @@  static void update_userdata(struct netconsole_target *nt)
 		struct userdatum *udm_item;
 		struct config_item *item;
 
-		if (child_count >= MAX_USERDATA_ITEMS)
+		if (WARN_ON_ONCE(child_count >= MAX_USERDATA_ITEMS))
 			break;
 		child_count++;