This is a note to let you know that I've just added the patch titled
jbd2: don't leak memory if setting up journal fails
to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
jbd2-don-t-leak-memory-if-setting-up-journal-fails.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From cd9cb405e0b948363811dc74dbb2890f56f2cb87 Mon Sep 17 00:00:00 2001
From: Eric Biggers <ebiggers@xxxxxxxxxx>
Date: Wed, 15 Mar 2017 15:08:48 -0400
Subject: jbd2: don't leak memory if setting up journal fails
From: Eric Biggers <ebiggers@xxxxxxxxxx>
commit cd9cb405e0b948363811dc74dbb2890f56f2cb87 upstream.
In journal_init_common(), if we failed to allocate the j_wbuf array, or
if we failed to create the buffer_head for the journal superblock, we
leaked the memory allocated for the revocation tables. Fix this.
Fixes: f0c9fd5458bacf7b12a9a579a727dc740cbe047e
Signed-off-by: Eric Biggers <ebiggers@xxxxxxxxxx>
Signed-off-by: Theodore Ts'o <tytso@xxxxxxx>
Reviewed-by: Jan Kara <jack@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/jbd2/journal.c | 22 +++++++++++-----------
fs/jbd2/revoke.c | 1 +
2 files changed, 12 insertions(+), 11 deletions(-)
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -1125,10 +1125,8 @@ static journal_t *journal_init_common(st
/* Set up a default-sized revoke table for the new mount. */
err = jbd2_journal_init_revoke(journal, JOURNAL_REVOKE_DEFAULT_HASH);
- if (err) {
- kfree(journal);
- return NULL;
- }
+ if (err)
+ goto err_cleanup;
spin_lock_init(&journal->j_history_lock);
@@ -1145,23 +1143,25 @@ static journal_t *journal_init_common(st
journal->j_wbufsize = n;
journal->j_wbuf = kmalloc_array(n, sizeof(struct buffer_head *),
GFP_KERNEL);
- if (!journal->j_wbuf) {
- kfree(journal);
- return NULL;
- }
+ if (!journal->j_wbuf)
+ goto err_cleanup;
bh = getblk_unmovable(journal->j_dev, start, journal->j_blocksize);
if (!bh) {
pr_err("%s: Cannot get buffer for journal superblock\n",
__func__);
- kfree(journal->j_wbuf);
- kfree(journal);
- return NULL;
+ goto err_cleanup;
}
journal->j_sb_buffer = bh;
journal->j_superblock = (journal_superblock_t *)bh->b_data;
return journal;
+
+err_cleanup:
+ kfree(journal->j_wbuf);
+ jbd2_journal_destroy_revoke(journal);
+ kfree(journal);
+ return NULL;
}
/* jbd2_journal_init_dev and jbd2_journal_init_inode:
--- a/fs/jbd2/revoke.c
+++ b/fs/jbd2/revoke.c
@@ -280,6 +280,7 @@ int jbd2_journal_init_revoke(journal_t *
fail1:
jbd2_journal_destroy_revoke_table(journal->j_revoke_table[0]);
+ journal->j_revoke_table[0] = NULL;
fail0:
return -ENOMEM;
}
Patches currently in stable-queue which might be from ebiggers@xxxxxxxxxx are
queue-4.9/ext4-mark-inode-dirty-after-converting-inline-directory.patch
queue-4.9/jbd2-don-t-leak-memory-if-setting-up-journal-fails.patch