f2fs: don't access node/meta inode mapping after iput
This fixes wrong access of address spaces of node and meta inodes after iput.
Fixes: 60aa4d5536
("f2fs: fix use-after-free issue when accessing sbi->stat_info")
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Родитель
31867b23d7
Коммит
7c77bf7de1
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@ -96,8 +96,10 @@ static void update_general_status(struct f2fs_sb_info *sbi)
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si->free_secs = free_sections(sbi);
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si->prefree_count = prefree_segments(sbi);
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si->dirty_count = dirty_segments(sbi);
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si->node_pages = NODE_MAPPING(sbi)->nrpages;
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si->meta_pages = META_MAPPING(sbi)->nrpages;
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if (sbi->node_inode)
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si->node_pages = NODE_MAPPING(sbi)->nrpages;
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if (sbi->meta_inode)
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si->meta_pages = META_MAPPING(sbi)->nrpages;
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si->nats = NM_I(sbi)->nat_cnt;
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si->dirty_nats = NM_I(sbi)->dirty_nat_cnt;
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si->sits = MAIN_SEGS(sbi);
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@ -175,7 +177,6 @@ static void update_sit_info(struct f2fs_sb_info *sbi)
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static void update_mem_info(struct f2fs_sb_info *sbi)
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{
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struct f2fs_stat_info *si = F2FS_STAT(sbi);
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unsigned npages;
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int i;
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if (si->base_mem)
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@ -258,10 +259,14 @@ get_cache:
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sizeof(struct extent_node);
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si->page_mem = 0;
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npages = NODE_MAPPING(sbi)->nrpages;
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si->page_mem += (unsigned long long)npages << PAGE_SHIFT;
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npages = META_MAPPING(sbi)->nrpages;
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si->page_mem += (unsigned long long)npages << PAGE_SHIFT;
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if (sbi->node_inode) {
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unsigned npages = NODE_MAPPING(sbi)->nrpages;
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si->page_mem += (unsigned long long)npages << PAGE_SHIFT;
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}
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if (sbi->meta_inode) {
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unsigned npages = META_MAPPING(sbi)->nrpages;
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si->page_mem += (unsigned long long)npages << PAGE_SHIFT;
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}
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}
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static int stat_show(struct seq_file *s, void *v)
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@ -1075,7 +1075,10 @@ static void f2fs_put_super(struct super_block *sb)
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f2fs_bug_on(sbi, sbi->fsync_node_num);
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iput(sbi->node_inode);
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sbi->node_inode = NULL;
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iput(sbi->meta_inode);
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sbi->meta_inode = NULL;
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/*
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* iput() can update stat information, if f2fs_write_checkpoint()
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@ -3410,6 +3413,7 @@ free_node_inode:
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f2fs_release_ino_entry(sbi, true);
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truncate_inode_pages_final(NODE_MAPPING(sbi));
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iput(sbi->node_inode);
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sbi->node_inode = NULL;
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free_stats:
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f2fs_destroy_stats(sbi);
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free_nm:
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@ -3422,6 +3426,7 @@ free_devices:
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free_meta_inode:
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make_bad_inode(sbi->meta_inode);
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iput(sbi->meta_inode);
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sbi->meta_inode = NULL;
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free_io_dummy:
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mempool_destroy(sbi->write_io_dummy);
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free_percpu:
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