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authorAl Viro <viro@zeniv.linux.org.uk>2017-05-21 20:08:42 +0300
committerAl Viro <viro@zeniv.linux.org.uk>2017-05-21 20:09:57 +0300
commita7cc722fff0b32bcd28bf4722dff816b0b695f7d (patch)
tree0ccfdbc0af990caf6282b7d2d222baf6fe01aa2b /arch
parent2ea659a9ef488125eb46da6eb571de5eae5c43f6 (diff)
downloadlinux-a7cc722fff0b32bcd28bf4722dff816b0b695f7d.tar.xz
fix unsafe_put_user()
__put_user_size() relies upon its first argument having the same type as what the second one points to; the only other user makes sure of that and unsafe_put_user() should do the same. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/include/asm/uaccess.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/include/asm/uaccess.h b/arch/x86/include/asm/uaccess.h
index 68766b276d9e..d9668c3beb5b 100644
--- a/arch/x86/include/asm/uaccess.h
+++ b/arch/x86/include/asm/uaccess.h
@@ -703,7 +703,7 @@ extern struct movsl_mask {
#define unsafe_put_user(x, ptr, err_label) \
do { \
int __pu_err; \
- __put_user_size((x), (ptr), sizeof(*(ptr)), __pu_err, -EFAULT); \
+ __put_user_size((__typeof__(*(ptr)))(x), (ptr), sizeof(*(ptr)), __pu_err, -EFAULT); \
if (unlikely(__pu_err)) goto err_label; \
} while (0)