From: Jan Kara <jack@xxxxxxx>
Convert get_user_pages() call to get_user_pages_fast(). This actually
fixes an apparent bug where get_user_pages() has been called without
mmap_sem for an arbitrary user-provided address.
CC: Tony Luck <tony.luck@xxxxxxxxx>
CC: linux-ia64@xxxxxxxxxxxxxxx
Signed-off-by: Jan Kara <jack@xxxxxxx>
---
arch/ia64/kernel/err_inject.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/arch/ia64/kernel/err_inject.c b/arch/ia64/kernel/err_inject.c
index 0c161ed6d18e..1fc8995bd8b8 100644
--- a/arch/ia64/kernel/err_inject.c
+++ b/arch/ia64/kernel/err_inject.c
@@ -142,8 +142,7 @@ store_virtual_to_phys(struct device *dev, struct device_attribute *attr,
u64 virt_addr=simple_strtoull(buf, NULL, 16);
int ret;
- ret = get_user_pages(current, current->mm, virt_addr,
- 1, VM_READ, 0, NULL, NULL);
+ ret = get_user_pages_fast(virt_addr, 1, VM_READ, NULL);
if (ret<=0) {
#ifdef ERR_INJ_DEBUG
printk("Virtual address %lx is not existing.\n",virt_addr);
--
2.1.4
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