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@xxxxxxx> CC: dmaciejak@xxxxxxxxxxxx --- fs/jbd/journal.c | 34 ++++++++++++++++++++++++---------- 1 files changed, 24 insertions(+), 10 deletions(-) diff --git a/fs/jbd/journal.c b/fs/jbd/journal.c index 9e4fa52..04eb7c8 100644 --- a/fs/jbd/journal.c +++ b/fs/jbd/journal.c @@ -632,6 +632,8 @@ struct journal_head *journal_get_descriptor_buffer(journal_t *journal) 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 block_device *bdev, 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 block_device *bdev, 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 inode *inode) 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 inode *inode) 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; } /* -- 1.6.0.2 -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html