Merge tag 'v3.7' into v4l_for_linus

Linux 3.7

* tag 'v3.7': (1545 commits)
  Linux 3.7
  Input: matrix-keymap - provide proper module license
  Revert "revert "Revert "mm: remove __GFP_NO_KSWAPD""" and associated damage
  ipv4: ip_check_defrag must not modify skb before unsharing
  Revert "mm: avoid waking kswapd for THP allocations when compaction is deferred or contended"
  inet_diag: validate port comparison byte code to prevent unsafe reads
  inet_diag: avoid unsafe and nonsensical prefix matches in inet_diag_bc_run()
  inet_diag: validate byte code to prevent oops in inet_diag_bc_run()
  inet_diag: fix oops for IPv4 AF_INET6 TCP SYN-RECV state
  mm: vmscan: fix inappropriate zone congestion clearing
  vfs: fix O_DIRECT read past end of block device
  net: gro: fix possible panic in skb_gro_receive()
  tcp: bug fix Fast Open client retransmission
  tmpfs: fix shared mempolicy leak
  mm: vmscan: do not keep kswapd looping forever due to individual uncompactable zones
  mm: compaction: validate pfn range passed to isolate_freepages_block
  mmc: sh-mmcif: avoid oops on spurious interrupts (second try)
  Revert misapplied "mmc: sh-mmcif: avoid oops on spurious interrupts"
  mmc: sdhci-s3c: fix missing clock for gpio card-detect
  lib/Makefile: Fix oid_registry build dependency
  ...

1 files changed, 10 insertions, 9 deletions

diff --git a/fs/file.c b/fs/file.c
index d3b5fa80b71b..eff23162485f 100644
--- a/fs/file.c
+++ b/fs/file.c
@@ -685,7 +685,6 @@ void do_close_on_exec(struct files_struct *files)
 	struct fdtable *fdt;
 
 	/* exec unshares first */
-	BUG_ON(atomic_read(&files->count) != 1);
 	spin_lock(&files->file_lock);
 	for (i = 0; ; i++) {
 		unsigned long set;
@@ -900,7 +899,7 @@ int replace_fd(unsigned fd, struct file *file, unsigned flags)
 		return __close_fd(files, fd);
 
 	if (fd >= rlimit(RLIMIT_NOFILE))
-		return -EMFILE;
+		return -EBADF;
 
 	spin_lock(&files->file_lock);
 	err = expand_files(files, fd);
@@ -926,7 +925,7 @@ SYSCALL_DEFINE3(dup3, unsigned int, oldfd, unsigned int, newfd, int, flags)
 		return -EINVAL;
 
 	if (newfd >= rlimit(RLIMIT_NOFILE))
-		return -EMFILE;
+		return -EBADF;
 
 	spin_lock(&files->file_lock);
 	err = expand_files(files, newfd);
@@ -995,16 +994,18 @@ int iterate_fd(struct files_struct *files, unsigned n,
 		const void *p)
 {
 	struct fdtable *fdt;
-	struct file *file;
 	int res = 0;
 	if (!files)
 		return 0;
 	spin_lock(&files->file_lock);
-	fdt = files_fdtable(files);
-	while (!res && n < fdt->max_fds) {
-		file = rcu_dereference_check_fdtable(files, fdt->fd[n++]);
-		if (file)
-			res = f(p, file, n);
+	for (fdt = files_fdtable(files); n < fdt->max_fds; n++) {
+		struct file *file;
+		file = rcu_dereference_check_fdtable(files, fdt->fd[n]);
+		if (!file)
+			continue;
+		res = f(p, file, n);
+		if (res)
+			break;
 	}
 	spin_unlock(&files->file_lock);
 	return res;