From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f70.google.com (mail-io1-f70.google.com [209.85.166.70]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 94F0E16D30B for ; Tue, 5 Nov 2024 11:17:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.70 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730805474; cv=none; b=lWPABeH01ZHaCuofUR5WVTNbJnoig7kwV0BU3SmlKFgXyiUh05gApenLRhrRDQFeGkVBa+sbtOpNd/tsc9MamKyRuiuZmIaijUTHHkbP1ykYvV7rAXSYyiF2WQo245TiRb2BVLoQNao1Lwy07g6Xgtgy20oVY0CSHAmWyWWBtcc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730805474; c=relaxed/simple; bh=sYOY7/eYPyraHf3lyb7BuAE00o4NvC3JJ3YyUo0QfS4=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=eDRcrOL6FEhZpW/NG62rOTTVrA0otAmQrS1yEsq0Ed3XBqDz4rR5wYU+rXGhk2sQe79NQl+4q3w8grh7hRfM/J923gb4SlZch68hZaDvdxuoksGhKSRjcJSqM6B3nsgpsKzGltoEayb+/WSJuniCRCzAqlNo8bg0oUSKm+OlR3k= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.166.70 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-io1-f70.google.com with SMTP id ca18e2360f4ac-83b567c78c3so471393239f.1 for ; Tue, 05 Nov 2024 03:17:52 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1730805472; x=1731410272; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=CnxxvP+aM8OMOvK10BXOrKfEK4hD3Hh9VsLhsQYgKNA=; b=MY1wFCsNBPWMyX9xkroS5GzFX83IyqI6FwCa+3CH7GufDvLqj4v5nlTQPI+80T0+K8 1AJ3YzqUuQ8sbSZjlDSNIzbQ22avbmIJA9xfio/cUlnYP+UeQFFsNBwbgcmFtZBzr0c6 Xkr/8t8uqhS4XJC8gX/YwfHR9Wl6z0aujWZB9k91wf0CURRFIUDal5CqaHW+8IEdq+oE tGhsqiRa0N8iiejUu6yTmEoDzTNzNvQYjSiHUMjz7sDk58j3aN7Hitm9ZJOg06y7g8em BsxPerqsypiZ27VxaGrTlcCAdvXfaPhhjS36JtuTt9/N7ZuemtnMsdDfCGdcTmWAKm+4 Qprg== X-Gm-Message-State: AOJu0Yw4WtlJSlsx+TD+ztm7vqEOUvuhWQ8aWUlHVdXuYnpBJ8IZcSV1 pCv5nSf2gNRqDK/QuyvRK1kOK4Hk7Eo1Q8QVCUKTM8GmQbjq8yAqwHO2fM3zoEJ7MjokQJAismM boe4/DY++OPwvfvOQNj0pwXy+mGRJjQhhUE++feTQtvvMXZLIlfTf0HE= X-Google-Smtp-Source: AGHT+IGnbWKkh7BI4hmhhrXFkCG79EcPO6J/1wh9vX1air9eXLOtShXzdNDpR6t0Gogmr4R3KpaH+q9+87WgdbSwyVH13ydrumP0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a92:c691:0:b0:3a0:ce43:fb62 with SMTP id e9e14a558f8ab-3a6aff71f01mr117629135ab.11.1730805471715; Tue, 05 Nov 2024 03:17:51 -0800 (PST) Date: Tue, 05 Nov 2024 03:17:51 -0800 In-Reply-To: <6729d8d1.050a0220.701a.0017.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6729fedf.050a0220.701a.001b.GAE@google.com> Subject: Re: [syzbot] Re: kernel BUG in free_bprm() From: syzbot To: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com. *** Subject: Re: kernel BUG in free_bprm() Author: dmantipov@yandex.ru #syz test https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next 850f22c42f4b0a14a015aecc26f46f9948ded6dd diff --git a/fs/exec.c b/fs/exec.c index ef18eb0ea5b4..df70ed8e36fe 100644 --- a/fs/exec.c +++ b/fs/exec.c @@ -1496,7 +1496,8 @@ static void free_bprm(struct linux_binprm *bprm) if (bprm->interp != bprm->filename) kfree(bprm->interp); kfree(bprm->fdpath); - kfree(bprm->argv0); + if (!IS_ERR(bprm->argv0)) + kfree(bprm->argv0); kfree(bprm); }