Check for negative sizes in file_set_size

* libdiskfs/file-set-size.c (diskfs_S_file_set_size): Return EINVAL if
size is negative.
* libnetfs/file-set-size.c (netfs_S_file_set_size): Likewise.
* libtreefs/s-file.c (treefs_S_file_set_size): Likewise.
* storeio/io.c (trivfs_S_file_set_size): Likewise.
* term/users.c (trivfs_S_file_set_size): Likewise.
* trans/null.c (trivfs_S_file_set_size): Likewise.
* trans/streamio.c (trivfs_S_file_set_size): Likewise.

7 files changed, 13 insertions, 1 deletions

diff --git a/libdiskfs/file-set-size.c b/libdiskfs/file-set-size.c
index 18abb469..fe2125ae 100644
--- a/libdiskfs/file-set-size.c
+++ b/libdiskfs/file-set-size.c
@@ -26,7 +26,7 @@ diskfs_S_file_set_size (struct protid *cred,
 {
   CHANGE_NODE_FIELD (cred,
 		     ({
-		       if (!(cred->po->openstat & O_WRITE))
+		       if (!(cred->po->openstat & O_WRITE) || (size < 0))
 			 err = EINVAL;
 		       else if (size < np->dn_stat.st_size)
 			 {
diff --git a/libnetfs/file-set-size.c b/libnetfs/file-set-size.c
index 72f31db7..b4a8cd23 100644
--- a/libnetfs/file-set-size.c
+++ b/libnetfs/file-set-size.c
@@ -29,6 +29,8 @@ netfs_S_file_set_size (struct protid *user,
   
   if (!user)
     return EOPNOTSUPP;
+  else if (size < 0)
+    return EINVAL;
   
   pthread_mutex_lock (&user->po->np->lock);
   err = netfs_attempt_set_size (user->user, user->po->np, size);
diff --git a/libtreefs/s-file.c b/libtreefs/s-file.c
index 73c32d7f..c24d645e 100644
--- a/libtreefs/s-file.c
+++ b/libtreefs/s-file.c
@@ -220,6 +220,8 @@ treefs_S_file_set_size (struct treefs_protid *cred, off_t size)
 {
   if (!cred)
     return EOPNOTSUPP;
+  else if (size < 0)
+    return EINVAL;
   return treefs_s_file_set_size (cred, size);
 }
 
diff --git a/storeio/io.c b/storeio/io.c
index c79f6ba3..eaa20def 100644
--- a/storeio/io.c
+++ b/storeio/io.c
@@ -178,6 +178,8 @@ trivfs_S_file_set_size (struct trivfs_protid *cred,
 {
   if (! cred)
     return EOPNOTSUPP;
+  else if (size < 0)
+    return EINVAL;
   else
     return 0;
 }
diff --git a/term/users.c b/term/users.c
index 9d745c6d..eacd150a 100644
--- a/term/users.c
+++ b/term/users.c
@@ -1808,6 +1808,8 @@ trivfs_S_file_set_size (struct trivfs_protid *cred,
 {
   if (!cred)
     return EOPNOTSUPP;
+  else if (size < 0)
+    return EINVAL;
   pthread_mutex_lock (&global_lock);
   if ((cred->po->openmodes & O_WRITE) == 0)
     {
diff --git a/trans/null.c b/trans/null.c
index 8b3b4e0f..4828cce3 100644
--- a/trans/null.c
+++ b/trans/null.c
@@ -245,6 +245,8 @@ trivfs_S_file_set_size (struct trivfs_protid *cred,
 			mach_port_t reply, mach_msg_type_name_t replytype,
 			loff_t size)
 {
+  if (size < 0)
+    return EINVAL;
   return 0;
 }
 
diff --git a/trans/streamio.c b/trans/streamio.c
index 8ff3dc63..68badd21 100644
--- a/trans/streamio.c
+++ b/trans/streamio.c
@@ -625,6 +625,8 @@ trivfs_S_file_set_size (struct trivfs_protid *cred,
     return EOPNOTSUPP;
   else if (!(cred->po->openmodes & O_WRITE))
     return EBADF;
+  else if (size < 0)
+    return EINVAL;
   else
     return 0;
 }