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Wed, 29 Jul 2026 14:19:21 +0800 (CST) Content-Type: text/plain; charset="utf-8" Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: base64 Subject: Re: [net] net: openvswitch: fix stack exhaustion from unaccounted clone_execute() recursion From: yang zhuorao To: aconole@redhat.com, i.maximets@ovn.org Cc: echaudro@redhat.com, security@kernel.org, dev@openvswitch.org, netdev@vger.kernel.org, pabeni@redhat.com, kuba@kernel.org, horms@kernel.org, edumazet@google.com, davem@davemloft.net Date: Wed, 29 Jul 2026 14:19:16 +0800 Message-ID: <178530595663.1425354.11834745902748968831@163.com> In-Reply-To: References: <178521875706.803907.3226960398667307795@163.com> X-CM-TRANSID:_____wAHZexlm2lqxX13MA--.20617S2 X-Coremail-Antispam: 1Uf129KBjvJXoW7tF1UJr4rXrW5JrWUCF1rWFg_yoW8GryfpF W5Kr15trWDAFyxZr97G3W5WFy8Gr4kJw43CFn5J395Jay5G3WrJFZ0krW09a1fKrWkJa12 gr40v3yfCF4DA3DanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDUYxBIdaVFxhVjvjDU0xZFpf9x07jg9NxUUUUU= X-CM-SenderInfo: xdoh55prxqwii6rwjhhfrp/xtbC5An19Gppm2mLAgAA3U QWFyb24sIElseWEsIHRoYW5rIHlvdSBib3RoIGZvciB0aGUgcmV2aWV3LgoKPiBUaGVyZSBpcyBh biBleGlzdGluZyBjaGVjayBmb3IgcmVjdXJzaW9uIGluIG92c19leGVjdXRlX2FjdGlvbnMoKSBh bmQgaW4KPiB0aGVyZSB3ZSBoYXZlIGEgbG9nIGJlZm9yZSBkcm9wcGluZzoKPiAuLi4KPiBXZSBz aG91bGQgaGF2ZSBhIHNpbWlsYXIgbG9nIGhlcmUgc28gd2UncmUgbm90IHNpbGVudGx5IGRyb3Bw aW5nLiAgQnV0LAo+IHNpbmNlIHdlIG5vdyBoYXZlIHR3byBwbGFjZXMgd2hlcmUgdGhpcyBjaGVj ayBvY2N1cnMgKGFuZCBpdCdzCj4gY29tcGxpY2F0ZWQgYmVjYXVzZSBvZiBob3cgZGVmZXJyZWQg YWN0aW9ucyBpcyBwcm9jZXNzZWQpLCBtYXliZSBpdCdzCj4gYmV0dGVyIHRvIGhhdmUgYSBmdW5j dGlvbiB0aGF0IGRvZXMgdGhlIG1hbmFnZW1lbnQ6CgpHb29kIHBvaW50LiAgdjIgZXh0cmFjdHMg dGhlIGVudGVyL2V4aXQgbG9naWMgaW50bwpvdnNfZXhlY19sZXZlbF9lbnRlcigpIGFuZCBvdnNf ZXhlY19sZXZlbF9leGl0KCkgaGVscGVycywgZXhhY3RseSBhcwp5b3Ugc3VnZ2VzdGVkLCBhbmQg dXNlcyB0aGVtIGluIGJvdGggY2xvbmVfZXhlY3V0ZSgpIGFuZApvdnNfZXhlY3V0ZV9hY3Rpb25z KCkuICBUaGUgbmV0X2NyaXRfcmF0ZWxpbWl0ZWQoKSBsb2cgaXMgbm93IGVtaXR0ZWQKb24gZXZl cnkgcmVjdXJzaW9uLWxpbWl0IGhpdCByZWdhcmRsZXNzIG9mIGVudHJ5IHBvaW50LgoKPiBUaGVy ZSBpcyBhIGRpZmZlcmVudCBpc3N1ZSBoZXJlIHRob3VnaC4gIFRoZSBleGVjX2xldmVsIGlzIHVz ZWQgYXMgYQo+IGNvdW50ZXIgZm9yIHRoZSBmbG93IGtleXMgZHVyaW5nIHRoZSBjbG9uZS4gIEFu ZCBpZiB3ZSBpbmNyZW1lbnQgaXQKPiB1bmNvbmRpdGlvbmFsbHkgd2hpbGUgbm90IGFsbG9jYXRp bmcgbmV3IGtleXMsIHdlJ2xsIHJhbiBvdXQgb2Yga2V5Cj4gc2xvdHMgbXVjaCBmYXN0ZXIgd2l0 aG91dCBhY3R1YWxseSB1c2luZyB0aGVtLgoKQWdyZWVkIHRoaXMgaXMgYSByZWFsIGNvbmNlcm4u ICBBcyBBYXJvbiBub3RlZCwgbW9zdCBkZXBsb3ltZW50cyBuZXN0Cm9ubHkgb25jZSBvciB0d2lj ZSBzbyB0aGUgcHJhY3RpY2FsIHByZXNzdXJlIGZyb20gdGhpcyBjaGFuZ2Ugc2hvdWxkCmJlIG1h bmFnZWFibGUsIGJ1dCBkZWNvdXBsaW5nIHRoZSByZWN1cnNpb24gY291bnRlciBmcm9tIHRoZSBr ZXkgc2xvdAppbmRleCBpcyB0aGUgcmlnaHQgbG9uZy10ZXJtIGZpeC4gIEhhcHB5IHRvIGxlYXZl IHRoYXQgYXMgYSBmb2xsb3ctdXAKc28gdGhpcyBzZWN1cml0eSBmaXggc3RheXMgZm9jdXNlZC4K CnYyIHBvc3RlZCBhcyBhIHNlcGFyYXRlIHRocmVhZC4KClJlZ2FyZHMsCnlhbmcgemh1b3Jhbwo=