redonkable
/
remarkable-linux
1
0
Fork 0
Code Releases Activity

xfs: don't call xfs_da_shrink_inode with NULL bp 

commit bb3d48dcf8 upstream.

xfs_attr3_leaf_create may have errored out before instantiating a buffer,
for example if the blkno is out of range.  In that case there is no work
to do to remove it, and in fact xfs_da_shrink_inode will lead to an oops
if we try.

This also seems to fix a flaw where the original error from
xfs_attr3_leaf_create gets overwritten in the cleanup case, and it
removes a pointless assignment to bp which isn't used after this.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=199969
Reported-by: Xu, Wen <wen.xu@gatech.edu>
Tested-by: Xu, Wen <wen.xu@gatech.edu>
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Cc: Eduardo Valentin <eduval@amazon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
pull/10/head
Eric Sandeen 2018-06-08 09:53:49 -07:00 committed by Greg Kroah-Hartman
parent 6f021e4ef3
commit 59f35b983e
1 changed files with 2 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
fs/xfs/libxfs/xfs_attr_leaf.c
View File

@ -785,9 +785,8 @@ xfs_attr_shortform_to_leaf(xfs_da_args_t *args)
ASSERT(blkno == 0);
error = xfs_attr3_leaf_create(args, blkno, &bp);
if (error) {
error = xfs_da_shrink_inode(args, 0, bp);
bp = NULL;
if (error)
/* xfs_attr3_leaf_create may not have instantiated a block */
if (bp && (xfs_da_shrink_inode(args, 0, bp) != 0))
goto out;
xfs_idata_realloc(dp, size, XFS_ATTR_FORK); /* try to put */
memcpy(ifp->if_u1.if_data, tmpbuffer, size); /* it back */