From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1ABDC1EBFED; Tue, 15 Oct 2024 11:40:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728992454; cv=none; b=g6idaopvNWnE6wYkWLGTB6KzH2WsxwBHptfeel2yCuw5rTVKtkydlPyizX5A5iBZGN687emPvtyHse00pgI29dci10wVmSde8+VjRc76ViENxr9aB8oHPjifyRatgRoxD3FNAaj8iQSCamph7ml9BwcuYLVbWmfg3TwEicgL1hc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728992454; c=relaxed/simple; bh=aVfac0RqHmfVMZJpegMbGEW7FKKprgDw/AnGlfaECb8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=MCAkzIPSTCmDIPW6AssbTz6x9yQqEFKNv/BAeqVQWj/UKWkI+dZAojL5WyFwWMMeO6Wk87bDjImF+yldiknPhFE6PRS7YZ5fYTqBqPBM/VN07v6CVGqeg8yZTC7Yc66RkhSiJfGYd2DonTWD9npqjUhm/kf1a7crGy1/LbYrezs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=lSVf79+a; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="lSVf79+a" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7763AC4CECE; Tue, 15 Oct 2024 11:40:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1728992453; bh=aVfac0RqHmfVMZJpegMbGEW7FKKprgDw/AnGlfaECb8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=lSVf79+amVvp2pGZzkto1Fk9aJYRr+Th09utDvrdyba3F5kR3McyMwrgrVBitYiYH JR9+HRx5g5hpfWf4C70lbIvJVXkzMTQ+xjDQfvPsuNN4VBELxgHg6lWttkez0KKaSH NNNvPbi+jT1xBcUh7inp/W8daZDguzAjueNI8Hvg= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, syzbot , Eric Dumazet , Daniel Borkmann , Martin KaFai Lau , John Fastabend , Sasha Levin Subject: [PATCH 5.15 122/691] sock_map: Add a cond_resched() in sock_hash_free() Date: Tue, 15 Oct 2024 13:21:10 +0200 Message-ID: <20241015112445.199191676@linuxfoundation.org> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241015112440.309539031@linuxfoundation.org> References: <20241015112440.309539031@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Eric Dumazet [ Upstream commit b1339be951ad31947ae19bc25cb08769bf255100 ] Several syzbot soft lockup reports all have in common sock_hash_free() If a map with a large number of buckets is destroyed, we need to yield the cpu when needed. Fixes: 75e68e5bf2c7 ("bpf, sockhash: Synchronize delete from bucket list on map free") Reported-by: syzbot Signed-off-by: Eric Dumazet Signed-off-by: Daniel Borkmann Acked-by: Martin KaFai Lau Acked-by: John Fastabend Link: https://lore.kernel.org/bpf/20240906154449.3742932-1-edumazet@google.com Signed-off-by: Sasha Levin --- net/core/sock_map.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/core/sock_map.c b/net/core/sock_map.c index 0f9648c6bcf76..9ef58dd1139d3 100644 --- a/net/core/sock_map.c +++ b/net/core/sock_map.c @@ -1177,6 +1177,7 @@ static void sock_hash_free(struct bpf_map *map) sock_put(elem->sk); sock_hash_free_elem(htab, elem); } + cond_resched(); } /* wait for psock readers accessing its map link */ -- 2.43.0