From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 69E9933B6F1; Wed, 30 Sep 2026 18:34:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790793272; cv=none; b=j3sQyrtVGT8YO54YM9gjnBIOLF6JvIpQWM/mPUVl+Yj3W55qt7VODthiFLk9xma3ofW9u7y24zEHNI2Udwh6n41l/0P2/X1yu98k5hC3OLtYcdhy6GM3zGhHc5ClWtzw4Qt+kC5Y3E4yoE0954+bGe9PmIy6a0y+y0Os5sgZ6mY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790793272; c=relaxed/simple; bh=4J4Dnc8ggtlO77gOL2x0IyN+PwjCMxf25V5gF3FqDn0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=uoJW5RUBbJKSfvRWFLd3Hs0nUZ9EipwBn+s99XqQfgeGu17czrTQdSh4gClbv9VfeO5Du/HvYNNvObg59m4UarnIajAnA9BaRD1noHe9FTRWvNCvkz1b58o0tsN0+ouagyjSF2P54spa5DVzNO4X0b3tRxdFVbr3WoZKOgZnDCM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=NDiiNjrS; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="NDiiNjrS" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C71E01F000FF; Wed, 30 Sep 2026 18:34:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1790793271; bh=4nRR/H97jzBqwfQgJbLU33zTJ7SwKLO4tbi7kZRhyMg=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=NDiiNjrSTwKafkxgZy467QwbRSpY65plAhhp2ia5IxpGbJpqBJWZi3sr6wBJg5v/s phGQH6+AsEDypUX673NIRGXk5iycqEXCG+t2UYlgciQlfUBXMONL10BD0J4p9zrU65 rKYMA9z/Nvp5GXCUsZxza/26oU/eJU+XTfgPN/KM= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Hui Peng , "Christian Brauner (Amutable)" , Sasha Levin Subject: [PATCH 6.18 196/395] autofs: fix sbi->pipe file reference leak in autofs_kill_sb() Date: Wed, 30 Sep 2026 17:27:38 +0200 Message-ID: <20260930152344.900806631@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260930152340.591469096@linuxfoundation.org> References: <20260930152340.591469096@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Hui Peng [ Upstream commit aa5e44b29ffe4eaa08cc2237fd65bc2596bc023e ] When autofs_fill_super() fails before clearing AUTOFS_SBI_CATATONIC (for example, when find_get_pid() fails on an invalid pgrp mount option, or when an fs_context is closed before mounting), deactivate_locked_super() invokes autofs_kill_sb() -> autofs_catatonic_mode(sbi). Because AUTOFS_SBI_CATATONIC is still set in sbi->flags, autofs_catatonic_mode() returns early without calling fput(sbi->pipe), permanently leaking the pipe struct file reference. Explicitly release sbi->pipe in autofs_kill_sb() if it is still non-NULL after autofs_catatonic_mode(). Fixes: ebc921ca9b92 ("autofs: copy autofs4 to autofs") Signed-off-by: Hui Peng Link: https://patch.msgid.link/20260919204808.2812930-1-benquike@gmail.com Signed-off-by: Christian Brauner (Amutable) Signed-off-by: Sasha Levin --- fs/autofs/inode.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/fs/autofs/inode.c b/fs/autofs/inode.c index 9593d407cbc6f..54e5c3a9cba2a 100644 --- a/fs/autofs/inode.c +++ b/fs/autofs/inode.c @@ -51,6 +51,10 @@ void autofs_kill_sb(struct super_block *sb) if (sbi) { /* Free wait queues, close pipe */ autofs_catatonic_mode(sbi); + if (sbi->pipe) { + fput(sbi->pipe); + sbi->pipe = NULL; + } put_pid(sbi->oz_pgrp); } -- 2.53.0