From d8d14bd09cddbaf0168d61af638455a26bd027ff Mon Sep 17 00:00:00 2001 From: Heiko Carstens Date: Wed, 29 Jan 2014 14:05:46 -0800 Subject: fs/compat: fix lookup_dcookie() parameter handling Commit d5dc77bfeeab ("consolidate compat lookup_dcookie()") coverted all architectures to the new compat_sys_lookup_dcookie() syscall. The "len" paramater of the new compat syscall must have the type compat_size_t in order to enforce zero extension for architectures where the ABI requires that the caller of a function performed zero and/or sign extension to 64 bit of all parameters. Signed-off-by: Heiko Carstens Cc: Al Viro Cc: Ingo Molnar Cc: "H. Peter Anvin" Cc: Hendrik Brueckner Cc: Martin Schwidefsky Cc: [v3.10+] Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/dcookies.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs') diff --git a/fs/dcookies.c b/fs/dcookies.c index ab5954b5026..ac44a69fbea 100644 --- a/fs/dcookies.c +++ b/fs/dcookies.c @@ -204,7 +204,7 @@ out: } #ifdef CONFIG_COMPAT -COMPAT_SYSCALL_DEFINE4(lookup_dcookie, u32, w0, u32, w1, char __user *, buf, size_t, len) +COMPAT_SYSCALL_DEFINE4(lookup_dcookie, u32, w0, u32, w1, char __user *, buf, compat_size_t, len) { #ifdef __BIG_ENDIAN return sys_lookup_dcookie(((u64)w0 << 32) | w1, buf, len); -- cgit v1.2.3-18-g5258