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Mon, 03 Aug 2026 06:40:12 -0700 (PDT) From: Uladzislau Rezki X-Google-Original-From: Uladzislau Rezki Date: Mon, 3 Aug 2026 15:40:10 +0200 To: Anshuman Khandual Cc: "Uladzislau Rezki (Sony)" , linux-mm@kvack.org, Andrew Morton , Baoquan He , LKML , syzbot+61c997e6be1d9bb300ba@syzkaller.appspotmail.com Subject: Re: [PATCH] mm/vmalloc: Do not warn on -ENOMEM from va_alloc() Message-ID: References: <20260802104627.63892-1-urezki@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Mon, Aug 03, 2026 at 09:19:52AM +0530, Anshuman Khandual wrote: > On Sun, Aug 02, 2026 at 12:46:27PM +0200, Uladzislau Rezki (Sony) wrote: > > Since vmalloc() accepts non-blocking GFP flags, allocation > > requests may fail when callers pass restrictive GFP masks. > > > > va_clip() may return -ENOMEM when its GFP_NOWAIT fallback > > allocation fails during NE_FIT_TYPE splitting. This is an > > expected failure, so va_alloc() should return the error > > without triggering a kernel splat. > > Dropping WARN_ON_ONCE() just for -ENOMEM while preserving this > warning for other returned errors does make sense. > > > > > Reported-by: syzbot+61c997e6be1d9bb300ba@syzkaller.appspotmail.com > > Very small nit. > > If there is actual link for the problem report, probably it could > be added as an Link: or Closes: here. > I hope Andrew can help here. If not i will resend! Thank you! -- Uladzislau Rezki