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authorChuck Lever <chuck.lever@oracle.com>2011-01-21 06:05:38 +0300
committerTrond Myklebust <Trond.Myklebust@netapp.com>2011-01-25 23:24:47 +0300
commitf61f6da0d53842e849bab7f69e1431bd3de1136d (patch)
tree8433904f645695338b98d3dc831631ffd6f129e5 /include/linux/posix_acl.h
parent731f3f482ad3b2c58a1af2d0a9a634a82803706a (diff)
downloadlinux-f61f6da0d53842e849bab7f69e1431bd3de1136d.tar.xz
NFS: Prevent memory allocation failure in nfsacl_encode()
nfsacl_encode() allocates memory in certain cases. This of course is not guaranteed to work. Since commit 9f06c719 "SUNRPC: New xdr_streams XDR encoder API", the kernel's XDR encoders can't return a result indicating possibly a failure, so a memory allocation failure in nfsacl_encode() has become fatal (ie, the XDR code Oopses) in some cases. However, the allocated memory is a tiny fixed amount, on the order of 40-50 bytes. We can easily use a stack-allocated buffer for this, with only a wee bit of nose-holding. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'include/linux/posix_acl.h')
-rw-r--r--include/linux/posix_acl.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/posix_acl.h b/include/linux/posix_acl.h
index d68283a898bb..54211c1cd926 100644
--- a/include/linux/posix_acl.h
+++ b/include/linux/posix_acl.h
@@ -71,6 +71,7 @@ posix_acl_release(struct posix_acl *acl)
/* posix_acl.c */
+extern void posix_acl_init(struct posix_acl *, int);
extern struct posix_acl *posix_acl_alloc(int, gfp_t);
extern struct posix_acl *posix_acl_clone(const struct posix_acl *, gfp_t);
extern int posix_acl_valid(const struct posix_acl *);