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swapon: check validity of swap_flags
[platform/adaptation/renesas_rcar/renesas_kernel.git]
/
mm
/
swapfile.c
diff --git
a/mm/swapfile.c
b/mm/swapfile.c
index
dae42f3
..
fafc26d
100644
(file)
--- a/
mm/swapfile.c
+++ b/
mm/swapfile.c
@@
-2022,6
+2022,9
@@
SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags)
struct page *page = NULL;
struct inode *inode = NULL;
+ if (swap_flags & ~SWAP_FLAGS_VALID)
+ return -EINVAL;
+
if (!capable(CAP_SYS_ADMIN))
return -EPERM;