/* * Kernel module for testing copy_to/from_user infrastructure. * * Copyright 2013 Google Inc. All Rights Reserved * * Authors: * Kees Cook * * This software is licensed under the terms of the GNU General Public * License version 2, as published by the Free Software Foundation, and * may be copied, distributed, and modified under those terms. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include #include #include #include #include #include #define test(condition, msg) \ ({ \ int cond = (condition); \ if (cond) \ pr_warn("%s\n", msg); \ cond; \ }) static int __init test_user_copy_init(void) { int ret = 0; char *kmem; char __user *usermem; char *bad_usermem; unsigned long user_addr; unsigned long value = 0x5A; kmem = kmalloc(PAGE_SIZE * 2, GFP_KERNEL); if (!kmem) return -ENOMEM; user_addr = vm_mmap(NULL, 0, PAGE_SIZE * 2, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_ANONYMOUS | MAP_PRIVATE, 0); if (user_addr >= (unsigned long)(TASK_SIZE)) { pr_warn("Failed to allocate user memory\n"); kfree(kmem); return -ENOMEM; } usermem = (char __user *)user_addr; bad_usermem = (char *)user_addr; /* Legitimate usage: none of these should fail. */ ret |= test(copy_from_user(kmem, usermem, PAGE_SIZE), "legitimate copy_from_user failed"); ret |= test(copy_to_user(usermem, kmem, PAGE_SIZE), "legitimate copy_to_user failed"); ret |= test(get_user(value, (unsigned long __user *)usermem), "legitimate get_user failed"); ret |= test(put_user(value, (unsigned long __user *)usermem), "legitimate put_user failed"); /* Invalid usage: none of these should succeed. */ ret |= test(!copy_from_user(kmem, (char __user *)(kmem + PAGE_SIZE), PAGE_SIZE), "illegal all-kernel copy_from_user passed"); ret |= test(!copy_from_user(bad_usermem, (char __user *)kmem, PAGE_SIZE), "illegal reversed copy_from_user passed"); ret |= test(!copy_to_user((char __user *)kmem, kmem + PAGE_SIZE, PAGE_SIZE), "illegal all-kernel copy_to_user passed"); ret |= test(!copy_to_user((char __user *)kmem, bad_usermem, PAGE_SIZE), "illegal reversed copy_to_user passed"); ret |= test(!get_user(value, (unsigned long __user *)kmem), "illegal get_user passed"); ret |= test(!put_user(value, (unsigned long __user *)kmem), "illegal put_user passed"); vm_munmap(user_addr, PAGE_SIZE * 2); kfree(kmem); if (ret == 0) { pr_info("tests passed.\n"); return 0; } return -EINVAL; } module_init(test_user_copy_init); static void __exit test_user_copy_exit(void) { pr_info("unloaded.\n"); } module_exit(test_user_copy_exit); MODULE_AUTHOR("Kees Cook "); MODULE_LICENSE("GPL"); odecs/ml26124.c?id=7fe654dca20892f37226c31bdd2d5b932f8d843a'>ml26124.c

ivate-remove&id=0d4ee015d5ea50febb882d00520d62c6de3f725c'>common.c

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author	Jens Axboe <axboe@fb.com>	2017-01-26 09:56:15 -0700
committer	Jens Axboe <axboe@fb.com>	2017-01-26 09:56:15 -0700
commit	0d4ee015d5ea50febb882d00520d62c6de3f725c (patch)
tree	6bd2e032e00c34590a8d39d5a43b6a7518d1384d /tools/perf/arch/common.c
parent	690e5325b8c7d5db05fc569c0f7b888bb4248272 (diff)
parent	19e420bb4076ace670addc55300e3b8c4a02dfc6 (diff)

Merge branch 'nvme-4.10-fixes' of git://git.infradead.org/nvme into for-linus

Pull nvme target fixes from Sagi: Given that its -rc6, I removed anything that is not bug fix. - nvmet-fc discard fix from Christoph - queue disconnect fix from James - nvmet-rdma dma sync fix from Parav - Some more nvmet fixes

Diffstat (limited to 'tools/perf/arch/common.c')