| Message ID | 20241204-netcons_overflow_test-v1-1-a85a8d0ace21@debian.org (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | netconsole: selftest for userdata overflow | expand |
On Wed, Dec 04, 2024 at 08:40:42AM -0800, Breno Leitao wrote: > 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>
diff --git a/drivers/net/netconsole.c b/drivers/net/netconsole.c index 4ea44a2f48f7b1f9059d275f0f0edc40cc1997f0..8b9dd4842f3e516c7eaa08205a45092e64417440 100644 --- a/drivers/net/netconsole.c +++ b/drivers/net/netconsole.c @@ -705,7 +705,7 @@ 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++;
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> --- drivers/net/netconsole.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)