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author | Nick Terrell <terrelln@fb.com> | 2022-10-21 16:00:35 -0700 |
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committer | Nick Terrell <terrelln@fb.com> | 2022-10-21 16:00:35 -0700 |
commit | 14e77332e74603efab8347c89d3cda447c3b97c9 (patch) | |
tree | b7b8a48f4f75590266a763c52e072dda32b228ae /lib/test_lockup.c | |
parent | 88a309465b3f05a100c3b81966982c0f9f5d23a6 (diff) | |
parent | 1d61754caa8c69f566504e63c8b3f3a2df0954c8 (diff) |
Merge branch 'main' into zstd-next
Diffstat (limited to 'lib/test_lockup.c')
-rw-r--r-- | lib/test_lockup.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/lib/test_lockup.c b/lib/test_lockup.c index 906b598740a7..c3fd87d6c2dd 100644 --- a/lib/test_lockup.c +++ b/lib/test_lockup.c @@ -417,9 +417,14 @@ static bool test_kernel_ptr(unsigned long addr, int size) return false; /* should be at least readable kernel address */ - if (access_ok(ptr, 1) || - access_ok(ptr + size - 1, 1) || - get_kernel_nofault(buf, ptr) || + if (!IS_ENABLED(CONFIG_ALTERNATE_USER_ADDRESS_SPACE) && + (access_ok((void __user *)ptr, 1) || + access_ok((void __user *)ptr + size - 1, 1))) { + pr_err("user space ptr invalid in kernel: %#lx\n", addr); + return true; + } + + if (get_kernel_nofault(buf, ptr) || get_kernel_nofault(buf, ptr + size - 1)) { pr_err("invalid kernel ptr: %#lx\n", addr); return true; |