diff options
| author |   Jan Kara <jack@suse.cz> | 2009-08-03 18:24:21 +0200 |
|---|---|---|
| committer |   Joel Becker <joel.becker@oracle.com> | 2009-08-17 12:50:12 -0700 |
| commit | ada508274b8698a33cb0e5bd037db0f9dc781795 (patch) | |
| tree | 43788f6393117159d75897bb75496c0ddb6c4e1b /fs | |
| parent | ocfs2: Fix possible deadlock when extending quota file (diff) | |
| download | linux-dev-ada508274b8698a33cb0e5bd037db0f9dc781795.tar.xz linux-dev-ada508274b8698a33cb0e5bd037db0f9dc781795.zip | |
ocfs2: Handle quota file corruption more gracefully
ocfs2_read_virt_blocks() does BUG when we try to read a block from a file
beyond its end. Since this can happen due to filesystem corruption, it
is not really an appropriate answer. Make ocfs2_read_quota_block() check
the condition and handle it by calling ocfs2_error() and returning EIO.
[ Modified to print ip_blkno in the error - Joel ]
Reported-by: Tristan Ye <tristan.ye@oracle.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/ocfs2/quota_global.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/fs/ocfs2/quota_global.c b/fs/ocfs2/quota_global.c index bf7742d0ee3b..44f2a5e1d042 100644 --- a/fs/ocfs2/quota_global.c +++ b/fs/ocfs2/quota_global.c @@ -23,6 +23,7 @@ #include "sysfile.h" #include "dlmglue.h" #include "uptodate.h" +#include "super.h" #include "quota.h" static struct workqueue_struct *ocfs2_quota_wq = NULL; @@ -114,6 +115,15 @@ int ocfs2_read_quota_block(struct inode *inode, u64 v_block, int rc = 0; struct buffer_head *tmp = *bh; + if (i_size_read(inode) >> inode->i_sb->s_blocksize_bits <= v_block) { + ocfs2_error(inode->i_sb, + "Quota file %llu is probably corrupted! Requested " + "to read block %Lu but file has size only %Lu\n", + (unsigned long long)OCFS2_I(inode)->ip_blkno, + (unsigned long long)v_block, + (unsigned long long)i_size_read(inode)); + return -EIO; + } rc = ocfs2_read_virt_blocks(inode, v_block, 1, &tmp, 0, ocfs2_validate_quota_block); if (rc) |