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 868B8345EA7; Sat, 12 Sep 2026 17:05:28 +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=1789232729; cv=none; b=Xf4CQh8CukNJAT5veT984LxKytLwIIZ1RGRIUe7ayhaL492XiHxnLOxjCEx3K7eRCylDjZ0NH1t2DXgBKVTdGbTSh4FYYheNO2SRsLiS/GdsPYu6Qr0cKc6mTOfe42ZfxPFemdiZpcl83c+NEHIQuk/MI3JmD3im5IyIRA8LdsI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789232729; c=relaxed/simple; bh=wRcZYd2kEvXh7wHtd2gQpUf54EsKhvkLTS8pTXMhtJk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=i6GyFodaA6gO5ria1HJG/eGHIdQoSZ0awFZatePgl2BZcMgti+jl7xQQcRxifDyPTrMWbJdEEVDXVJ5RJ2qp6DUkq3G2ZI0epdwzT4AkZaMb6aUOg1iiOATjB59ZAAE9rrurha23fbzkLC0MURw+HmfNXng0AGITmdZgu16+uYQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=V2BwFVuz; 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="V2BwFVuz" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7EBA91F000FF; Sat, 12 Sep 2026 17:05:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789232728; bh=5ztnjF3PdaHQIcHQ7mPSt+8cHDqVuhOumCIdOOLUfh0=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=V2BwFVuzY6CmC5yNM1rdwPYwekEp1oiLM/tRBr9UeqB3hjshr54L0GF56AO56LgFk OAR9bb4GWkrfJeDy8vBvWWo8EbJF4DXqUkiitOKsPWCrS+64YVO1cAKs4WFCOF/+Hy JZYIMgN1CCJOijNnxg8f9WDZFWLqmc10SUgKV0rI= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Yichong Chen , Tyler Hicks Subject: [PATCH 5.15 068/935] ecryptfs: hold msg ctx list lock when cleaning daemon queue Date: Sat, 12 Sep 2026 08:51:38 +0200 Message-ID: <20260912065528.397893846@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260912065526.833703348@linuxfoundation.org> References: <20260912065526.833703348@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 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Yichong Chen commit 779972513c2fa8c7938e54976f686091dafff22f upstream. ecryptfs_exorcise_daemon() drops queued messages from a dying daemon without holding ecryptfs_msg_ctx_lists_mux, but ecryptfs_msg_ctx_alloc_to_free() requires that lock. Take the list lock while moving the queued contexts back to the free list to avoid racing with other global msg ctx list users. Fixes: f66e883eb618 ("eCryptfs: integrate eCryptfs device handle into the module.") Cc: Signed-off-by: Yichong Chen Signed-off-by: Tyler Hicks Signed-off-by: Greg Kroah-Hartman --- fs/ecryptfs/messaging.c | 2 ++ 1 file changed, 2 insertions(+) --- a/fs/ecryptfs/messaging.c +++ b/fs/ecryptfs/messaging.c @@ -165,6 +165,7 @@ int ecryptfs_exorcise_daemon(struct ecry mutex_unlock(&daemon->mux); goto out; } + mutex_lock(&ecryptfs_msg_ctx_lists_mux); list_for_each_entry_safe(msg_ctx, msg_ctx_tmp, &daemon->msg_ctx_out_queue, daemon_out_list) { list_del(&msg_ctx->daemon_out_list); @@ -173,6 +174,7 @@ int ecryptfs_exorcise_daemon(struct ecry "the out queue of a dying daemon\n", __func__); ecryptfs_msg_ctx_alloc_to_free(msg_ctx); } + mutex_unlock(&ecryptfs_msg_ctx_lists_mux); hlist_del(&daemon->euid_chain); mutex_unlock(&daemon->mux); kfree_sensitive(daemon);