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author | Andrey Ryabinin <aryabinin@virtuozzo.com> | 2016-05-20 16:59:34 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-05-20 17:58:30 -0700 |
commit | eae08dcab80c695c16c9f1f7dcd5b8ed52bfc88b (patch) | |
tree | f3900e677e70d10fd46140e811baa7e748148e9b /lib | |
parent | 1771c6e1a567ea0ba2cccc0a4ffe68a1419fd8ef (diff) | |
download | linux-stable-eae08dcab80c695c16c9f1f7dcd5b8ed52bfc88b.tar.gz linux-stable-eae08dcab80c695c16c9f1f7dcd5b8ed52bfc88b.tar.bz2 linux-stable-eae08dcab80c695c16c9f1f7dcd5b8ed52bfc88b.zip |
kasan/tests: add tests for user memory access functions
Add some tests for the newly-added user memory access API.
Link: http://lkml.kernel.org/r/1462538722-1574-1-git-send-email-aryabinin@virtuozzo.com
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib')
-rw-r--r-- | lib/test_kasan.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/lib/test_kasan.c b/lib/test_kasan.c index 48e5a0be655c..5e51872b3fc1 100644 --- a/lib/test_kasan.c +++ b/lib/test_kasan.c @@ -12,9 +12,12 @@ #define pr_fmt(fmt) "kasan test: %s " fmt, __func__ #include <linux/kernel.h> +#include <linux/mman.h> +#include <linux/mm.h> #include <linux/printk.h> #include <linux/slab.h> #include <linux/string.h> +#include <linux/uaccess.h> #include <linux/module.h> static noinline void __init kmalloc_oob_right(void) @@ -363,6 +366,51 @@ static noinline void __init ksize_unpoisons_memory(void) kfree(ptr); } +static noinline void __init copy_user_test(void) +{ + char *kmem; + char __user *usermem; + size_t size = 10; + int unused; + + kmem = kmalloc(size, GFP_KERNEL); + if (!kmem) + return; + + usermem = (char __user *)vm_mmap(NULL, 0, PAGE_SIZE, + PROT_READ | PROT_WRITE | PROT_EXEC, + MAP_ANONYMOUS | MAP_PRIVATE, 0); + if (IS_ERR(usermem)) { + pr_err("Failed to allocate user memory\n"); + kfree(kmem); + return; + } + + pr_info("out-of-bounds in copy_from_user()\n"); + unused = copy_from_user(kmem, usermem, size + 1); + + pr_info("out-of-bounds in copy_to_user()\n"); + unused = copy_to_user(usermem, kmem, size + 1); + + pr_info("out-of-bounds in __copy_from_user()\n"); + unused = __copy_from_user(kmem, usermem, size + 1); + + pr_info("out-of-bounds in __copy_to_user()\n"); + unused = __copy_to_user(usermem, kmem, size + 1); + + pr_info("out-of-bounds in __copy_from_user_inatomic()\n"); + unused = __copy_from_user_inatomic(kmem, usermem, size + 1); + + pr_info("out-of-bounds in __copy_to_user_inatomic()\n"); + unused = __copy_to_user_inatomic(usermem, kmem, size + 1); + + pr_info("out-of-bounds in strncpy_from_user()\n"); + unused = strncpy_from_user(kmem, usermem, size + 1); + + vm_munmap((unsigned long)usermem, PAGE_SIZE); + kfree(kmem); +} + static int __init kmalloc_tests_init(void) { kmalloc_oob_right(); @@ -387,6 +435,7 @@ static int __init kmalloc_tests_init(void) kasan_stack_oob(); kasan_global_oob(); ksize_unpoisons_memory(); + copy_user_test(); return -EAGAIN; } |