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Message-Id: <200901270734.n0R7YXCj001118@imap1.linux-foundation.org>
Date: Mon, 26 Jan 2009 23:34:33 -0800
From: akpm@...ux-foundation.org
To: mm-commits@...r.kernel.org
Cc: jack@...e.cz, dmaciejak@...tinet.com, linux-ext4@...r.kernel.org
Subject: + jbd-fix-oops-in-jbd_journal_init_inode-on-corrupted-fs.patch added to -mm tree
The patch titled
jbd: fix oops in jbd_journal_init_inode() on corrupted fs
has been added to the -mm tree. Its filename is
jbd-fix-oops-in-jbd_journal_init_inode-on-corrupted-fs.patch
Before you just go and hit "reply", please:
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find
out what to do about this
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: jbd: fix oops in jbd_journal_init_inode() on corrupted fs
From: Jan Kara <jack@...e.cz>
On 32-bit system with CONFIG_LBD getblk can fail because provided block
number is too big. Make JBD gracefully handle that.
Signed-off-by: Jan Kara <jack@...e.cz>
Cc: <dmaciejak@...tinet.com>
Cc: <linux-ext4@...r.kernel.org>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
---
fs/jbd/journal.c | 34 ++++++++++++++++++++++++----------
1 file changed, 24 insertions(+), 10 deletions(-)
diff -puN fs/jbd/journal.c~jbd-fix-oops-in-jbd_journal_init_inode-on-corrupted-fs fs/jbd/journal.c
--- a/fs/jbd/journal.c~jbd-fix-oops-in-jbd_journal_init_inode-on-corrupted-fs
+++ a/fs/jbd/journal.c
@@ -632,6 +632,8 @@ struct journal_head *journal_get_descrip
return NULL;
bh = __getblk(journal->j_dev, blocknr, journal->j_blocksize);
+ if (!bh)
+ return NULL;
lock_buffer(bh);
memset(bh->b_data, 0, journal->j_blocksize);
set_buffer_uptodate(bh);
@@ -728,9 +730,7 @@ journal_t * journal_init_dev(struct bloc
if (!journal->j_wbuf) {
printk(KERN_ERR "%s: Cant allocate bhs for commit thread\n",
__func__);
- kfree(journal);
- journal = NULL;
- goto out;
+ goto out_err;
}
journal->j_dev = bdev;
journal->j_fs_dev = fs_dev;
@@ -738,11 +738,19 @@ journal_t * journal_init_dev(struct bloc
journal->j_maxlen = len;
bh = __getblk(journal->j_dev, start, journal->j_blocksize);
- J_ASSERT(bh != NULL);
+ if (!bh) {
+ printk(KERN_ERR
+ "%s: Cannot get buffer for journal superblock\n",
+ __func__);
+ goto out_err;
+ }
journal->j_sb_buffer = bh;
journal->j_superblock = (journal_superblock_t *)bh->b_data;
-out:
+
return journal;
+out_err:
+ kfree(journal);
+ return NULL;
}
/**
@@ -782,8 +790,7 @@ journal_t * journal_init_inode (struct i
if (!journal->j_wbuf) {
printk(KERN_ERR "%s: Cant allocate bhs for commit thread\n",
__func__);
- kfree(journal);
- return NULL;
+ goto out_err;
}
err = journal_bmap(journal, 0, &blocknr);
@@ -791,16 +798,23 @@ journal_t * journal_init_inode (struct i
if (err) {
printk(KERN_ERR "%s: Cannnot locate journal superblock\n",
__func__);
- kfree(journal);
- return NULL;
+ goto out_err;
}
bh = __getblk(journal->j_dev, blocknr, journal->j_blocksize);
- J_ASSERT(bh != NULL);
+ if (!bh) {
+ printk(KERN_ERR
+ "%s: Cannot get buffer for journal superblock\n",
+ __func__);
+ goto out_err;
+ }
journal->j_sb_buffer = bh;
journal->j_superblock = (journal_superblock_t *)bh->b_data;
return journal;
+out_err:
+ kfree(journal);
+ return NULL;
}
/*
_
Patches currently in -mm which might be from jack@...e.cz are
linux-next.patch
ext2-add-blk_issue_flush-to-syncing-paths.patch
jbd-fix-oops-in-jbd_journal_init_inode-on-corrupted-fs.patch
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