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xfs: don't leak the retained da state when doing a leaf to node conversion

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If a setxattr operation finds an xattr structure in leaf format, adding
the attr can fail due to lack of space and hence requires an upgrade to
node format.  After this happens, we'll roll the transaction and
re-enter the state machine, at which time we need to perform a second
lookup of the attribute name to find its new location.  This lookup
attaches a new da state structure to the xfs_attr_item but doesn't free
the old one (from the leaf lookup) and leaks it.  Fix that.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Allison Henderson <allison.henderson@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:
Darrick J. Wong 2022-05-20 14:41:42 +10:00 committed by Dave Chinner
parent 309001c22c
commit a618acab13
1 changed files with 8 additions and 2 deletions
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10
fs/xfs/libxfs/xfs_attr.c
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@ -1401,8 +1401,10 @@ xfs_attr_node_hasname(
int retval, error;
state = xfs_da_state_alloc(args);
if (statep != NULL)
if (statep != NULL) {
ASSERT(*statep == NULL);
*statep = state;
}
/*
* Search to see if name exists, and get back a pointer to it.
@ -1428,6 +1430,10 @@ xfs_attr_node_addname_find_attr(
struct xfs_da_args *args = attr->xattri_da_args;
int error;
if (attr->xattri_da_state)
xfs_da_state_free(attr->xattri_da_state);
attr->xattri_da_state = NULL;
/*
* Search to see if name already exists, and get back a pointer
* to where it should go.
@ -1593,7 +1599,7 @@ STATIC int
xfs_attr_node_get(
struct xfs_da_args *args)
{
struct xfs_da_state *state;
struct xfs_da_state *state = NULL;
struct xfs_da_state_blk *blk;
int i;
int error;