diff options
| author | Daniel Borkmann <[email protected]> | 2015-02-27 15:55:40 +0100 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2015-02-28 10:41:59 +0100 |
| commit | 6bbb614ec478961c7443086bdf7fd6784479c14a (patch) | |
| tree | 2a8f3e5e4faa36f90ce6588bf8157851bf831ded | |
| parent | 954e12f7a800ce38b4722ca1d7a6d0293d377b55 (diff) | |
x86/mm: Unexport set_memory_ro() and set_memory_rw()
This effectively unexports set_memory_ro() and set_memory_rw()
functions, and thus reverts:
a03352d2c1dc ("x86: export set_memory_ro and set_memory_rw").
They have been introduced for debugging purposes in e1000e, but
no module user is in mainline kernel (anymore?) and we
explicitly do not want modules to use these functions, as they
i.e. protect eBPF (interpreted & JIT'ed) images from malicious
modifications or bugs.
Outside of eBPF scope, I believe also other set_memory_*()
functions should be unexported on x86 for modules.
Signed-off-by: Daniel Borkmann <[email protected]>
Acked-by: Alexei Starovoitov <[email protected]>
Cc: Arjan van de Ven <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Bruce Allan <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Jesse Brandeburg <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: [email protected]
Link: http://lkml.kernel.org/r/a064393a0a5d319eebde5c761cfd743132d4f213.1425040940.git.daniel@iogearbox.net
Signed-off-by: Ingo Molnar <[email protected]>
| -rw-r--r-- | arch/x86/mm/pageattr.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c index 536ea2fb6e33..81e8282d8c2f 100644 --- a/arch/x86/mm/pageattr.c +++ b/arch/x86/mm/pageattr.c @@ -1654,13 +1654,11 @@ int set_memory_ro(unsigned long addr, int numpages) { return change_page_attr_clear(&addr, numpages, __pgprot(_PAGE_RW), 0); } -EXPORT_SYMBOL_GPL(set_memory_ro); int set_memory_rw(unsigned long addr, int numpages) { return change_page_attr_set(&addr, numpages, __pgprot(_PAGE_RW), 0); } -EXPORT_SYMBOL_GPL(set_memory_rw); int set_memory_np(unsigned long addr, int numpages) { |