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NFSD: Correct the size calculation in fault_inject_write 

If len == 0 we end up with size = (0 - 1), which could cause bad things
to happen in copy_from_user().

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Bryan Schumaker 2012-12-07 16:17:29 -05:00 committed by J. Bruce Fields
parent 0a5c33e23c
commit 18d9a2ca2e
1 changed files with 1 additions and 1 deletions
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2
fs/nfsd/fault_inject.c
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@ -122,7 +122,7 @@ static ssize_t fault_inject_write(struct file *file, const char __user *buf,
size_t len, loff_t *ppos)
{
char write_buf[INET6_ADDRSTRLEN];
size_t size = min(sizeof(write_buf), len) - 1;
size_t size = min(sizeof(write_buf) - 1, len);
struct net *net = current->nsproxy->net_ns;
struct sockaddr_storage sa;
u64 val;