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xfs: fix memory allocation failures with ACLs

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Ever since increasing the number of supported ACLs from 25 to as
many as can fit in an xattr, there have been reports of order 4
memory allocations failing in the ACL code. Fix it in the same way
we've fixed all the xattr read/write code that has the same problem.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Mark Tinguely <tinguely@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
This commit is contained in:
Dave Chinner 2013-09-02 20:52:59 +10:00 committed by Ben Myers
parent 0a4edc8f0b
commit 2dc164f296
1 changed files with 22 additions and 10 deletions
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32
fs/xfs/xfs_acl.c
View file

@ -152,9 +152,12 @@ xfs_get_acl(struct inode *inode, int type)
* go out to the disk.
*/
len = XFS_ACL_MAX_SIZE(ip->i_mount);
xfs_acl = kzalloc(len, GFP_KERNEL);
if (!xfs_acl)
return ERR_PTR(-ENOMEM);
xfs_acl = kmem_zalloc(len, KM_SLEEP | KM_MAYFAIL);
if (!xfs_acl) {
xfs_acl = kmem_zalloc_large(len);
if (!xfs_acl)
return ERR_PTR(-ENOMEM);
}
error = -xfs_attr_get(ip, ea_name, (unsigned char *)xfs_acl,
&len, ATTR_ROOT);
@ -175,10 +178,13 @@ xfs_get_acl(struct inode *inode, int type)
if (IS_ERR(acl))
goto out;
out_update_cache:
out_update_cache:
set_cached_acl(inode, type, acl);
out:
kfree(xfs_acl);
out:
if (is_vmalloc_addr(xfs_acl))
kmem_free_large(xfs_acl);
else
kfree(xfs_acl);
return acl;
}
@ -209,9 +215,12 @@ xfs_set_acl(struct inode *inode, int type, struct posix_acl *acl)
struct xfs_acl *xfs_acl;
int len = XFS_ACL_MAX_SIZE(ip->i_mount);
xfs_acl = kzalloc(len, GFP_KERNEL);
if (!xfs_acl)
return -ENOMEM;
xfs_acl = kmem_zalloc(len, KM_SLEEP | KM_MAYFAIL);
if (!xfs_acl) {
xfs_acl = kmem_zalloc_large(len);
if (!xfs_acl)
return -ENOMEM;
}
xfs_acl_to_disk(xfs_acl, acl);
@ -222,7 +231,10 @@ xfs_set_acl(struct inode *inode, int type, struct posix_acl *acl)
error = -xfs_attr_set(ip, ea_name, (unsigned char *)xfs_acl,
len, ATTR_ROOT);
kfree(xfs_acl);
if (is_vmalloc_addr(xfs_acl))
kmem_free_large(xfs_acl);
else
kfree(xfs_acl);
} else {
/*
* A NULL ACL argument means we want to remove the ACL.