Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
Merge tag 'usercopy-v4.8-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull usercopy hardening fix from Kees Cook:
"Expand the arm64 vmalloc check to include skipping the module space
too"
* tag 'usercopy-v4.8-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
mm: usercopy: Check for module addresses
+4
-1
+4
-1
mm/usercopy.c
+4
-1
mm/usercopy.c
···
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* Some architectures (arm64) return true for virt_addr_valid() on
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* vmalloced addresses. Work around this by checking for vmalloc
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* first.
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+
*
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* We also need to check for module addresses explicitly since we
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* may copy static data from modules to userspace
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*/
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-
if (is_vmalloc_addr(ptr))
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+
if (is_vmalloc_or_module_addr(ptr))
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return NULL;
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if (!virt_addr_valid(ptr))