Commit 44d6f787 authored by Hidehiro Kawai's avatar Hidehiro Kawai Committed by Theodore Ts'o

ext3: fix a bug accessing freed memory in ext3_abort

Vegard Nossum reported a bug which accesses freed memory (found via
kmemcheck).  When journal has been aborted, ext3_put_super() calls
ext3_abort() after freeing the journal_t object, and then ext3_abort()
accesses it.  This patch fix it.
Signed-off-by: default avatarHidehiro Kawai <hidehiro.kawai.ez@hitachi.com>
Acked-by: default avatarJan Kara <jack@suse.cz>
Signed-off-by: default avatar"Theodore Ts'o" <tytso@mit.edu>
parent 0173a326
......@@ -281,7 +281,8 @@ void ext3_abort (struct super_block * sb, const char * function,
EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS;
sb->s_flags |= MS_RDONLY;
EXT3_SB(sb)->s_mount_opt |= EXT3_MOUNT_ABORT;
journal_abort(EXT3_SB(sb)->s_journal, -EIO);
if (EXT3_SB(sb)->s_journal)
journal_abort(EXT3_SB(sb)->s_journal, -EIO);
}
void ext3_warning (struct super_block * sb, const char * function,
......@@ -390,11 +391,14 @@ static void ext3_put_super (struct super_block * sb)
{
struct ext3_sb_info *sbi = EXT3_SB(sb);
struct ext3_super_block *es = sbi->s_es;
int i;
int i, err;
ext3_xattr_put_super(sb);
if (journal_destroy(sbi->s_journal) < 0)
err = journal_destroy(sbi->s_journal);
sbi->s_journal = NULL;
if (err < 0)
ext3_abort(sb, __func__, "Couldn't clean up the journal");
if (!(sb->s_flags & MS_RDONLY)) {
EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
es->s_state = cpu_to_le16(sbi->s_mount_state);
......
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