From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793729879; b=MX+frnRgH35V4woxQ0s00civOv/jmYU7dZVgAo2gZasTzqrs+w5Q/BXTgGxq9wmpGJiu J8K/IZeOsEqfDK8rU/wRFsUJo3bdHQH0SxpihAOBMb+oZJwJxJn9jugST8fwRRTMEW/BY p4VyiHvqh51TT8neCF7Go7wmVt/nFurpQ6kFmpKMzgEOO/kL+ezlqtjLW/c8Kb8+kLof+ 1K+PM1XdTa85YGVC3oOvnWYFFD1XRo+vi429omTj8t/8FvqF6tjI7GZjOROusHJSKILv2 c7+imXBNmxwOHJjBfaWioVnluM1DKZGIJBZm2VVCEgnW9nxXmhD+V8I5gYn7NNZjCUg== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793729879; h=Received:DKIM-Signature:Date:From:To:Cc:Subject:Message-ID: References:MIME-Version:Content-Type:Content-Disposition:In-Reply-To; bh=JPfBxuzzEE7KvkqimyPoXojo7KxSVDk0J6om8MLBKvM=; b=U3o6ew43JSsVIZ1hhicO0PGTUkz9ryJ1Skk0tWIXEl6JjIxE44i/nNjCh+yZOrPqIzsL ijubcFnkmQQ51vL4zvZiAqlhXa1R4/0F8D1ZLxCYoWhzAIfoQL01LwOyLyBRy4fXarHRg 3mGqKMmrxp7+GaiustmUMdyL89ZIUVgSYriRwO7fD1+ddlUK2cUHENLAbQlMYcyRVTfn1 OMmoNVGtaJEg2Bk0doMCwD3yuVVgvGMYn8k9KUMwqXyHkuVVRPWjxfZDEYHDnSA4P24id eDU3fjJtHZKiAMFPpN7nOcGpcLbANjombE1M7nNjDwJFIBwzgPH+wFTsqJX77rLpKag== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=cYJ0xKPO; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 723F4606A324 for ; Tue, 3 Nov 2026 18:17:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=cYJ0xKPO Received: by smtp.kernel.org (Postfix) with ESMTPSA id B8C261F0093A; Tue, 3 Nov 2026 18:17:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793729879; bh=JPfBxuzzEE7KvkqimyPoXojo7KxSVDk0J6om8MLBKvM=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=cYJ0xKPOTqS32Ar9DQVkqqNTCGdv3S49T2/wab0KO0vfF8JB1tAQneyKhJZz2ETBZ 1uaQ8RTsK/NrbxR1ddclVKvSsp29+tyFprevmXcw8wR2R5LFVLmzYLBhoTiWhlGVvU F2470d+AOSkoi1SpR4ddGFwYncfUZniFJakcGRTw4QgiuwHCNWkG8AwEUxfyM8xC5K 4kbiAta7Xdsl1W34FZDVSLrP899z/4sgcIkdvgws4zFIqfCG2LcINBQ+lXIUO7GQc8 D/sWfjA/lWzH2Y/NY0u8Xp9ZIDS5g915wBo8crzoobensrNe3nKOpvjMajfts1gWDc EXEWZA1/IcfAQ== Date: Tue, 3 Nov 2026 18:17:57 +0000 From: Eric Biggers To: Bartos-Elekes Zsolt Cc: Theodore Ts'o , Andreas Dilger , linux-ext4@vger.kernel.org Subject: Re: PROBLEM: NULL pointer dereference in ext4_mb_load_buddy_gfp Message-ID: <20261103181757.GA2224825@google.com> References: <6b2dbf1d-43b8-f9e9-a2b6-e538f295bf94@kite.hu> X-Mailing-List: linux-ext4@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <6b2dbf1d-43b8-f9e9-a2b6-e538f295bf94@kite.hu> On Tue, Nov 03, 2026 at 03:26:08PM +0100, Bartos-Elekes Zsolt wrote: > Linux version 6.1.191 (me@hostname) (gcc (Debian 12.2.0-14+deb12u1) 12.2.0, Yes, the stable maintainers broke ext4 in 6.1.191. The fix is https://lore.kernel.org/linux-ext4/20261102-ext4-ntfs3-null-folio-v1-1-4fd91ee23a4a@elliotjb.com/ - Eric