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| author | Al Viro <viro@zeniv.linux.org.uk> | 2017-07-10 07:40:49 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2017-07-10 07:40:49 -0400 |
| commit | c43aeb198048f64abda8655fdcdebe71cf1877ba (patch) | |
| tree | c5bfb5b0027c5d27766b0d29f120a56e04313198 | |
| parent | f263fbb8d60824993c1b64385056a3cfdbb21d45 (diff) | |
| download | linux-c43aeb198048f64abda8655fdcdebe71cf1877ba.tar.gz | |
fix brown paperbag bug in inlined copy_..._iter()
"copied nothing" == "return 0", not "return full size".
Fixes: aa28de275a24 "iov_iter/hardening: move object size checks to inlined part"
Spotted-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| -rw-r--r-- | include/linux/uio.h | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/include/linux/uio.h b/include/linux/uio.h index 342d2dc225b95..8a642cda641c8 100644 --- a/include/linux/uio.h +++ b/include/linux/uio.h @@ -103,7 +103,7 @@ static __always_inline __must_check size_t copy_to_iter(const void *addr, size_t bytes, struct iov_iter *i) { if (unlikely(!check_copy_size(addr, bytes, true))) - return bytes; + return 0; else return _copy_to_iter(addr, bytes, i); } @@ -112,7 +112,7 @@ static __always_inline __must_check size_t copy_from_iter(void *addr, size_t bytes, struct iov_iter *i) { if (unlikely(!check_copy_size(addr, bytes, false))) - return bytes; + return 0; else return _copy_from_iter(addr, bytes, i); } @@ -130,7 +130,7 @@ static __always_inline __must_check size_t copy_from_iter_nocache(void *addr, size_t bytes, struct iov_iter *i) { if (unlikely(!check_copy_size(addr, bytes, false))) - return bytes; + return 0; else return _copy_from_iter_nocache(addr, bytes, i); } @@ -160,7 +160,7 @@ static __always_inline __must_check size_t copy_from_iter_flushcache(void *addr, size_t bytes, struct iov_iter *i) { if (unlikely(!check_copy_size(addr, bytes, false))) - return bytes; + return 0; else return _copy_from_iter_flushcache(addr, bytes, i); } |