d5dc77bfeeab0 "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.
Cc: sta...@vger.kernel.org # v3.10+
Signed-off-by: Heiko Carstens <heiko.carst...@de.ibm.com>
---
fs/dcookies.c | 2 +-
include/linux/compat.h | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/fs/dcookies.c b/fs/dcookies.c
index ab5954b50267..ac44a69fbea9 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);
diff --git a/include/linux/compat.h b/include/linux/compat.h
index c5642b83e02b..19f6003291de 100644
--- a/include/linux/compat.h
+++ b/include/linux/compat.h
@@ -422,7 +422,7 @@ extern long compat_arch_ptrace(struct task_struct *child,
compat_long_t request,
asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
compat_long_t addr, compat_long_t data);
-asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, size_t);
+asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *,
compat_size_t);
/*
* epoll (fs/eventpoll.c) compat bits follow ...
*/
--
1.8.4.5
--
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