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fat: fix using uninitialized fields of fat_inode/fsinfo_inode

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am: 8353f338de

Change-Id: I8079951acacf4ede0afacd719fef7218b5a4b118
This commit is contained in:
OGAWA Hirofumi 2017-03-15 02:14:00 +00:00 • committed by android-build-merger
commit c29b2d6c1c
1 changed files with 12 additions and 1 deletions
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13
fs/fat/inode.c
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@ -1269,6 +1269,16 @@ out:
return 0; return 0;
} }
static void fat_dummy_inode_init(struct inode *inode)
{
/* Initialize this dummy inode to work as no-op. */
MSDOS_I(inode)->mmu_private = 0;
MSDOS_I(inode)->i_start = 0;
MSDOS_I(inode)->i_logstart = 0;
MSDOS_I(inode)->i_attrs = 0;
MSDOS_I(inode)->i_pos = 0;
}
static int fat_read_root(struct inode *inode) static int fat_read_root(struct inode *inode)
{ {
struct msdos_sb_info *sbi = MSDOS_SB(inode->i_sb); struct msdos_sb_info *sbi = MSDOS_SB(inode->i_sb);
@ -1713,12 +1723,13 @@ int fat_fill_super(struct super_block *sb, void *data, int silent, int isvfat,
fat_inode = new_inode(sb); fat_inode = new_inode(sb);
if (!fat_inode) if (!fat_inode)
goto out_fail; goto out_fail;
MSDOS_I(fat_inode)->i_pos = 0; fat_dummy_inode_init(fat_inode);
sbi->fat_inode = fat_inode; sbi->fat_inode = fat_inode;
fsinfo_inode = new_inode(sb); fsinfo_inode = new_inode(sb);
if (!fsinfo_inode) if (!fsinfo_inode)
goto out_fail; goto out_fail;
fat_dummy_inode_init(fsinfo_inode);
fsinfo_inode->i_ino = MSDOS_FSINFO_INO; fsinfo_inode->i_ino = MSDOS_FSINFO_INO;
sbi->fsinfo_inode = fsinfo_inode; sbi->fsinfo_inode = fsinfo_inode;
insert_inode_hash(fsinfo_inode); insert_inode_hash(fsinfo_inode);