From systemd-devel Wed Aug 12 13:13:27 2020 From: Tomasz Chmielewski Date: Wed, 12 Aug 2020 13:13:27 +0000 To: systemd-devel Subject: Re: [systemd-devel] protecting sshd against forkbombs, excessive memory usage by other processes Message-Id: X-MARC-Message: https://marc.info/?l=systemd-devel&m=159723801604731 T24gMjAyMC0wOC0xMiAyMjowNywgTWFudGFzIE1pa3VsxJduYXMgd3JvdGU6Cj4gT24gV2VkLCBB dWcgMTIsIDIwMjAgYXQgNzowMyBBTSBUb21hc3ogQ2htaWVsZXdza2kgPG1hbmdvb0B3cGtnLm9y Zz4KPiB3cm90ZToKPiAKPj4gSSd2ZSBtYWRlIGEgbWlzdGFrZSBhbmQgaGF2ZSBleGVjdXRlZCBh IGZvcmtib21iLWxpa2UgdGFzay4gQWxtb3N0Cj4+IGltbWVkaWF0ZWx5LCB0aGUgc3lzdGVtIGJl Y2FtZSB1bnJlc3BvbnNpdmUsIHNzaCBzZXNzaW9uIGZyb3plIG9yCj4+IHdlcmUKPj4gdmVyeSBz bG93IHRvIG91dHB1dCBldmVuIHNpbmdsZSBjaGFyYWN0ZXJzOyBzb21lIHNzaCBzZXNzaW9ucyB0 aW1lZAo+PiBvdXQKPj4gYW5kIHdlcmUgZGlzY29ubmVjdGVkLgo+PiAKPj4gSXQgd2FzIG5vdCBw b3NzaWJsZSB0byBjb25uZWN0IGEgbmV3IHNzaCBzZXNzaW9uIHRvIGludGVycnVwdCB0aGUKPj4g cnVuYXdheSB0YXNrIC0gbmV3IGNvbm5lY3Rpb24gYXR0ZW1wdCB3ZXJlIHNpbXBseSB0aW1pbmcg b3V0Lgo+PiAKPj4gU1NIIGlzIHRoZSBvbmx5IHdheSB0byBhY2Nlc3MgdGhlIHNlcnZlci4gRXZl bnR1YWxseSwgYWZ0ZXIgc29tZSAzMAo+PiBtaW5zLCB0aGUgc3lzdGVtICJ1bmZyb3plIiAtIGJ1 dCAtIEkgd29uZGVyIC0gY2FuIHN5c3RlbWQgaGVscAo+PiBzeXNhZG1pbnMKPj4gZ2V0dGluZyBv dXQgb2Ygc3VjaCBzaXR1YXRpb25zPwo+PiAKPj4gSSByZWFsaXplIGl0J3MgYSBiaXQgdHJpY2t5 LCBhcyB0aGVyZSBhcmUgdHdvIGNhc2VzIGhlcmU6Cj4+IAo+PiAxKSBtaXNiZWhhdmluZyBwcm9n cmFtIGlzIGEgY2hpbGQgcHJvY2VzcyBvZiBzc2hkIChpLmUuIHVzZXIgbG9nZ2VkCj4+IGluCj4+ IGFuZCBleGVjdXRlZCBhIGZvcmtib21iKQo+IAo+IEkgZG9uJ3QgdGhpbmsgImNoaWxkIHByb2Nl c3Mgb2Ygc3NoZCIgaXMgdGhlIHVzZWZ1bCBwYXJ0LCBhcyBsb2dnZWQtaW4KPiB1c2VyIHByb2Nl c3NlcyBhcmUgYWN0dWFsbHkgbW92ZWQgdG8gYSBzZXBhcmF0ZSBjZ3JvdXAgZm9yIHRoZSBzZXNz aW9uCj4g4oCTIHNvIHllcywgdGhleSdyZSBzc2hkIGNoaWxkcmVuLCBidXQgdGhleSBhY3R1YWxs eSBoYXZlIHJlc291cmNlCj4gbGltaXRzIGZ1bGx5IHNlcGFyYXRlIGZyb20gdGhlIG1haW4gc3No ZCBkYWVtb24gcHJvY2Vzcy4KPiAKPiBXaGljaCBtZWFucyB0aGF0IHdpdGggc3lzdGVtZCwgZWFj aCB1c2VyIGFscmVhZHkgaGFzIHRoZWlyIG93biBsaW1pdAo+IG9uIHRoZSBudW1iZXIgb2YgcHJv Y2Vzc2VzL3Rhc2tzICh0aGUgZGVmYXVsdCBpbiB1c2VyLS5zbGljZS5kIGlzCj4gVGFza3NNYXg9 MzMlIG9mLi4uc29tZXRoaW5nLCBidXQgaXQgY291bGQgYmUgbG93ZXJlZCB0byBlLmcuIDEwJSBv ciB0bwo+IDQwOTYpIHdpdGhvdXQgYWZmZWN0aW5nIHRoZSBzZXJ2aWNlIGl0c2VsZi4KPiAKPiBT byBJJ20gc3VyZSB0aGF0IHNzaGQuc2VydmljZSBhbmQgdXNlci0wLnNsaWNlIGNvdWxkIGJlIHR3 ZWFrZWQKPiBzb21laG93IHRvIGdpdmUgcm9vdCBhIGhpZ2hlciBwcmlvcml0eSBhdCBjZ3JvdXAg bGV2ZWwsIGJ1dCB0aGF0Cj4gZGVwZW5kcyBvbiB3aGF0IHlvdXIgc3lzdGVtIGFjdHVhbGx5IHJh biBvdXQgb2YuLi4KCkl0IHJhbiBvdXQgb2YgbWVtb3J5LgoKClRvbWFzegpfX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpzeXN0ZW1kLWRldmVsIG1haWxpbmcg bGlzdApzeXN0ZW1kLWRldmVsQGxpc3RzLmZyZWVkZXNrdG9wLm9yZwpodHRwczovL2xpc3RzLmZy ZWVkZXNrdG9wLm9yZy9tYWlsbWFuL2xpc3RpbmZvL3N5c3RlbWQtZGV2ZWwK