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authorLinus Torvalds <torvalds@linux-foundation.org>2020-06-18 22:35:51 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2020-06-18 22:35:51 +0300
commit5e857ce6eae7ca21b2055cca4885545e29228fe2 (patch)
treeb3b5b9a88222fe189ba44989a84932c7258c64c4 /lib
parent670d0a4b10704667765f7d18f7592993d02783aa (diff)
parent0c389d89abc28edf70ae847ee2fa55acb267b826 (diff)
downloadlinux-5e857ce6eae7ca21b2055cca4885545e29228fe2.tar.xz
Merge branch 'hch' (maccess patches from Christoph Hellwig)
Merge non-faulting memory access cleanups from Christoph Hellwig: "Andrew and I decided to drop the patches implementing your suggested rename of the probe_kernel_* and probe_user_* helpers from -mm as there were way to many conflicts. After -rc1 might be a good time for this as all the conflicts are resolved now" This also adds a type safety checking patch on top of the renaming series to make the subtle behavioral difference between 'get_user()' and 'get_kernel_nofault()' less potentially dangerous and surprising. * emailed patches from Christoph Hellwig <hch@lst.de>: maccess: make get_kernel_nofault() check for minimal type compatibility maccess: rename probe_kernel_address to get_kernel_nofault maccess: rename probe_user_{read,write} to copy_{from,to}_user_nofault maccess: rename probe_kernel_{read,write} to copy_{from,to}_kernel_nofault
Diffstat (limited to 'lib')
-rw-r--r--lib/test_lockup.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/lib/test_lockup.c b/lib/test_lockup.c
index f258743a0d83..bd7c7ff39f6b 100644
--- a/lib/test_lockup.c
+++ b/lib/test_lockup.c
@@ -419,8 +419,8 @@ static bool test_kernel_ptr(unsigned long addr, int size)
/* should be at least readable kernel address */
if (access_ok(ptr, 1) ||
access_ok(ptr + size - 1, 1) ||
- probe_kernel_address(ptr, buf) ||
- probe_kernel_address(ptr + size - 1, buf)) {
+ get_kernel_nofault(buf, ptr) ||
+ get_kernel_nofault(buf, ptr + size - 1)) {
pr_err("invalid kernel ptr: %#lx\n", addr);
return true;
}
@@ -437,7 +437,7 @@ static bool __maybe_unused test_magic(unsigned long addr, int offset,
if (!addr)
return false;
- if (probe_kernel_address(ptr, magic) || magic != expected) {
+ if (get_kernel_nofault(magic, ptr) || magic != expected) {
pr_err("invalid magic at %#lx + %#x = %#x, expected %#x\n",
addr, offset, magic, expected);
return true;