tree 84d95521c8e298b0595be4f66ab5540154d6217b
parent 2df4f26167ab6adc7d2648f57f433ff461965fc8
author Al Viro <viro@ZenIV.linux.org.uk> 1351654668 +0000
committer Linus Torvalds <torvalds@linux-foundation.org> 1351657648 -0700

Return the right error value when dup[23]() newfd argument is too large

Jack Lin reports that the error return from dup3() for the RLIMIT_NOFILE
case changed incorrectly after 3.6.

The culprit is commit f33ff9927f42 ("take rlimit check to callers of
expand_files()") which when it moved the "return -EMFILE" out to the
caller, didn't notice that the dup3() had special code to turn the
EMFILE return into EBADF.

The replace_fd() helper that got added later then inherited the bug too.

Reported-by: Jack Lin <linliangjie@huawei.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
[ Noted more bugs, wrote proper changelog, fixed up typos - Linus ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>