From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 892CC1A704B; Wed, 20 Nov 2024 12:58:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732107518; cv=none; b=JVwqRlX4f3df78X+qYCh6jfSo7ZokR/btUN1yLJkbZ21LW/NqKuFv9wxxWrtWEKY9ZGy7MLW86eeUKsXWXKRlHcHYeDT3qgZOLbZmgQQ6dX+QHZ0BAWyMav1zpxBxsBekr1ed07579Uh65eyxMSScj3LKg6geKrCOjnWFKkSzAg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732107518; c=relaxed/simple; bh=DwlPtRSSWvl/bX1vm+4vyLGpGTl3POX8ueUMBo08lxI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=mR5mwNfiDRPtfW++uyqVxGVa+SfiFPGTxYpTQfD0JMN3FW2ERIWE7CU9E0YzCfdysJhwC9izmRYSRB5UfTlhfvLtk7eoC/32k5XjoRSYGGVeRtYk1HOkDpZ7aisNmwo832d+CPn7ted0VM6UTRX8ht9vFtZEgJHlfywxE6v5IXM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=CGAwLQP+; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="CGAwLQP+" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5E1EFC4CED1; Wed, 20 Nov 2024 12:58:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1732107518; bh=DwlPtRSSWvl/bX1vm+4vyLGpGTl3POX8ueUMBo08lxI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=CGAwLQP+2g5C0R13xCzCV6WHCTHYi/eRPSBE8zCkEV581fsUrXFCeGSmbhAAWjkqY ZJUJXtn6U/Ao14RNOx+Jktk26ZZC+aqfFHhwouO+zhS0WXZNOJZzs7Sy6vbaFQFsIJ WQJ+QUoHCDsgahZNLpUV7GdQesdIIRIYHzsOLyHs= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Hugh Dickins , Chuck Lever , Jeongjun Park , Yu Zhao , Andrew Morton Subject: [PATCH 6.11 048/107] mm: revert "mm: shmem: fix data-race in shmem_getattr()" Date: Wed, 20 Nov 2024 13:56:23 +0100 Message-ID: <20241120125630.759755487@linuxfoundation.org> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241120125629.681745345@linuxfoundation.org> References: <20241120125629.681745345@linuxfoundation.org> User-Agent: quilt/0.67 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 6.11-stable review patch. If anyone has any objections, please let me know. ------------------ From: Andrew Morton commit d1aa0c04294e29883d65eac6c2f72fe95cc7c049 upstream. Revert d949d1d14fa2 ("mm: shmem: fix data-race in shmem_getattr()") as suggested by Chuck [1]. It is causing deadlocks when accessing tmpfs over NFS. As Hugh commented, "added just to silence a syzbot sanitizer splat: added where there has never been any practical problem". Link: https://lkml.kernel.org/r/ZzdxKF39VEmXSSyN@tissot.1015granger.net [1] Fixes: d949d1d14fa2 ("mm: shmem: fix data-race in shmem_getattr()") Acked-by: Hugh Dickins Cc: Chuck Lever Cc: Jeongjun Park Cc: Yu Zhao Cc: Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman --- mm/shmem.c | 2 -- 1 file changed, 2 deletions(-) --- a/mm/shmem.c +++ b/mm/shmem.c @@ -1163,9 +1163,7 @@ static int shmem_getattr(struct mnt_idma stat->attributes_mask |= (STATX_ATTR_APPEND | STATX_ATTR_IMMUTABLE | STATX_ATTR_NODUMP); - inode_lock_shared(inode); generic_fillattr(idmap, request_mask, inode, stat); - inode_unlock_shared(inode); if (shmem_huge_global_enabled(inode, 0, false, NULL, 0)) stat->blksize = HPAGE_PMD_SIZE;