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| author |   Trond Myklebust <Trond.Myklebust@netapp.com> | 2012-08-14 18:30:41 -0400 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2012-08-16 16:15:50 -0400 |
| commit | b291f1b1c86aa0c7bc3df2994e6a1a4e53f1fde0 (patch) | |
| tree | 6f1381f4a70174dc719c557751536e8cb8828757 /fs/nfs/nfs4proc.c | |
| parent | NFSv4: Fix pointer arithmetic in decode_getacl (diff) | |
| download | linux-dev-b291f1b1c86aa0c7bc3df2994e6a1a4e53f1fde0.tar.xz linux-dev-b291f1b1c86aa0c7bc3df2994e6a1a4e53f1fde0.zip | |
NFSv4: Fix the acl cache size calculation
Currently, we do not take into account the size of the 16 byte
struct nfs4_cached_acl header, when deciding whether or not we should
cache the acl data. Consequently, we will end up allocating an
8k buffer in order to fit a maximum size 4k acl.
This patch adjusts the calculation so that we limit the cache size
to 4k for the acl header+data.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/nfs4proc.c')
| -rw-r--r-- | fs/nfs/nfs4proc.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 286ab7078413..635274140b18 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -3737,9 +3737,10 @@ out: static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len) { struct nfs4_cached_acl *acl; + size_t buflen = sizeof(*acl) + acl_len; - if (pages && acl_len <= PAGE_SIZE) { - acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL); + if (pages && buflen <= PAGE_SIZE) { + acl = kmalloc(buflen, GFP_KERNEL); if (acl == NULL) goto out; acl->cached = 1; |