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See http://www.infradead.org/rpr.html X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Explicitly check for the magic value insted of implicitly relying on its number representation. Signed-off-by: Christoph Hellwig Reviewed-by: Johannes Thumshirn --- fs/read_write.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/fs/read_write.c b/fs/read_write.c index 5db58b8c78d0dd..f153116bc5399b 100644 --- a/fs/read_write.c +++ b/fs/read_write.c @@ -840,8 +840,7 @@ ssize_t rw_copy_check_uvector(int type, const struct iovec __user * uvector, ret = -EINVAL; goto out; } - if (type >= 0 - && unlikely(!access_ok(buf, len))) { + if (type != CHECK_IOVEC_ONLY && unlikely(!access_ok(buf, len))) { ret = -EFAULT; goto out; } @@ -911,7 +910,7 @@ ssize_t compat_rw_copy_check_uvector(int type, } if (len < 0) /* size_t not fitting in compat_ssize_t .. */ goto out; - if (type >= 0 && + if (type != CHECK_IOVEC_ONLY && !access_ok(compat_ptr(buf), len)) { ret = -EFAULT; goto out;