From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx2.suse.de ([195.135.220.15]:44076 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752185AbeB0LXL (ORCPT ); Tue, 27 Feb 2018 06:23:11 -0500 From: Nikolay Borisov To: stable@vger.kernel.org Cc: chao2.yu@samsung.com, jaegeuk@kernel.org, cm224.lee@samsung.com, Yunlei He , Nikolay Borisov Subject: [PATCH 4.4] f2fs: fix a bug caused by NULL extent tree Date: Tue, 27 Feb 2018 13:23:05 +0200 Message-Id: <1519730585-909-1-git-send-email-nborisov@suse.com> Sender: stable-owner@vger.kernel.org List-ID: From: Yunlei He Thread A: Thread B: -f2fs_remount -sbi->mount_opt.opt = 0; <--- -f2fs_iget -do_read_inode -f2fs_init_extent_tree -F2FS_I(inode)->extent_tree is NULL -default_options && parse_options -remount return <--- -f2fs_map_blocks -f2fs_lookup_extent_tree -f2fs_bug_on(sbi, !et); The same problem with f2fs_new_inode. Signed-off-by: Yunlei He Signed-off-by: Jaegeuk Kim Signed-off-by: Nikolay Borisov --- Hello Greg, I would like to have upstream commit dad48e73127b ("f2fs: fix a bug caused by NULL extent tree") included in the 4.4 stable kernel. This is the backport of it. fs/f2fs/extent_cache.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/fs/f2fs/extent_cache.c b/fs/f2fs/extent_cache.c index 7ddba812e11b..6827b9c942dc 100644 --- a/fs/f2fs/extent_cache.c +++ b/fs/f2fs/extent_cache.c @@ -172,7 +172,7 @@ void f2fs_drop_largest_extent(struct inode *inode, pgoff_t fofs) __drop_largest_extent(inode, fofs, 1); } -void f2fs_init_extent_tree(struct inode *inode, struct f2fs_extent *i_ext) +static void __f2fs_init_extent_tree(struct inode *inode, struct f2fs_extent *i_ext) { struct f2fs_sb_info *sbi = F2FS_I_SB(inode); struct extent_tree *et; @@ -204,6 +204,14 @@ void f2fs_init_extent_tree(struct inode *inode, struct f2fs_extent *i_ext) write_unlock(&et->lock); } +void f2fs_init_extent_tree(struct inode *inode, struct f2fs_extent *i_ext) +{ + __f2fs_init_extent_tree(inode, i_ext); + + if (!F2FS_I(inode)->extent_tree) + set_inode_flag(F2FS_I(inode), FI_NO_EXTENT); +} + static bool f2fs_lookup_extent_tree(struct inode *inode, pgoff_t pgofs, struct extent_info *ei) { -- 2.7.4