nfsd: Decode and send 64bit time values
The seconds field of an nfstime4 structure is 64bit, but we are assuming
that the first 32bits are zero-filled. So if the client tries to set
atime to a value before the epoch (touch -t 196001010101), then the
server will save the wrong value on disk.
Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Cc: stable@kernel.org
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 1cf1545..888a600 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -344,10 +344,7 @@
all 32 bits of 'nseconds'. */
READ_BUF(12);
len += 12;
- READ32(dummy32);
- if (dummy32)
- return nfserr_inval;
- READ32(iattr->ia_atime.tv_sec);
+ READ64(iattr->ia_atime.tv_sec);
READ32(iattr->ia_atime.tv_nsec);
if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
return nfserr_inval;
@@ -370,10 +367,7 @@
all 32 bits of 'nseconds'. */
READ_BUF(12);
len += 12;
- READ32(dummy32);
- if (dummy32)
- return nfserr_inval;
- READ32(iattr->ia_mtime.tv_sec);
+ READ64(iattr->ia_mtime.tv_sec);
READ32(iattr->ia_mtime.tv_nsec);
if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
return nfserr_inval;
@@ -2372,8 +2366,7 @@
if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
if ((buflen -= 12) < 0)
goto out_resource;
- WRITE32(0);
- WRITE32(stat.atime.tv_sec);
+ WRITE64((s64)stat.atime.tv_sec);
WRITE32(stat.atime.tv_nsec);
}
if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
@@ -2386,15 +2379,13 @@
if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
if ((buflen -= 12) < 0)
goto out_resource;
- WRITE32(0);
- WRITE32(stat.ctime.tv_sec);
+ WRITE64((s64)stat.ctime.tv_sec);
WRITE32(stat.ctime.tv_nsec);
}
if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
if ((buflen -= 12) < 0)
goto out_resource;
- WRITE32(0);
- WRITE32(stat.mtime.tv_sec);
+ WRITE64((s64)stat.mtime.tv_sec);
WRITE32(stat.mtime.tv_nsec);
}
if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {