From: J. Bruce Fields Date: Wed, 2 Dec 2009 00:42:57 +0000 (-0500) Subject: nfsd4: fix share mode permissions X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=57ecb34febc4c133ca0ccc7817796605a78a01d3;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git nfsd4: fix share mode permissions NFSv4 opens may function as locks denying other NFSv4 users the rights to open a file. We're requiring a user to have write permissions before they can deny write. We're *not* requiring a user to have write permissions to deny read, which is if anything a more drastic denial. What was intended was to require write permissions for DENY_READ. Signed-off-by: J. Bruce Fields --- diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c index 60a93cdefef5..a468224a118f 100644 --- a/fs/nfsd/nfs4proc.c +++ b/fs/nfsd/nfs4proc.c @@ -171,7 +171,7 @@ do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfs accmode |= NFSD_MAY_READ; if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC); - if (open->op_share_deny & NFS4_SHARE_DENY_WRITE) + if (open->op_share_deny & NFS4_SHARE_DENY_READ) accmode |= NFSD_MAY_WRITE; status = fh_verify(rqstp, current_fh, S_IFREG, accmode);