netdev - [PATCH v2 1/2] net: page_pool: check page pool ethtool stats

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Message-ID: <abr3xq5eankrmzvyhjd5za6itfm5s7wpqwfy7lp3iuwsv33oi3@dx5eg6wmb2so>
Date: Sun, 1 Oct 2023 13:41:15 +0200
From: Sven Auhagen <sven.auhagen@...eatech.de>
To: netdev@...r.kernel.org
Cc: thomas.petazzoni@...tlin.com, hawk@...nel.org, lorenzo@...nel.org, 
	Paulo.DaSilva@...erna.com, ilias.apalodimas@...aro.org, mcroce@...ux.microsoft.com
Subject: [PATCH v2 1/2] net: page_pool: check page pool ethtool stats

If the page_pool variable is null while passing it to
the page_pool_get_stats function we receive a kernel error.

Check if the page_pool variable is at least valid.

Signed-off-by: Sven Auhagen <sven.auhagen@...eatech.de>
Reported-by: Paulo Da Silva <Paulo.DaSilva@...erna.com>

diff --git a/net/core/page_pool.c b/net/core/page_pool.c
index 2396c99bedea..4c5dca6b4a16 100644
--- a/net/core/page_pool.c
+++ b/net/core/page_pool.c
@@ -65,6 +65,9 @@ bool page_pool_get_stats(struct page_pool *pool,
 	if (!stats)
 		return false;
 
+	if (!pool)
+		return false;
+
 	/* The caller is responsible to initialize stats. */
 	stats->alloc_stats.fast += pool->alloc_stats.fast;
 	stats->alloc_stats.slow += pool->alloc_stats.slow;
-- 
2.42.0