Messages in this thread | | | Date | Tue, 27 Nov 2018 08:43:27 +0100 | From | Greg Kroah-Hartman <> | Subject | Re: [PATCH] lkdtm: print real addresses |
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On Wed, Nov 07, 2018 at 08:14:10PM +0000, Christophe Leroy wrote: > Today, when doing a lkdtm test before the readiness of the > random generator, (ptrval) is printed instead of the address > at which it perform the fault: > > [ 1597.337030] lkdtm: Performing direct entry EXEC_USERSPACE > [ 1597.337142] lkdtm: attempting ok execution at (ptrval) > [ 1597.337398] lkdtm: attempting bad execution at (ptrval) > [ 1597.337460] kernel tried to execute user page (77858000) -exploit attempt? (uid: 0) > [ 1597.344769] Unable to handle kernel paging request for instruction fetch > [ 1597.351392] Faulting instruction address: 0x77858000 > [ 1597.356312] Oops: Kernel access of bad area, sig: 11 [#1] > > If the lkdtm test is done later on, it prints an hashed address. > > In both cases this is pointless. The purpose of the test is to > ensure the kernel generates an Oops at the expected address, > so real addresses needs to be printed. This patch fixes that.
I am pretty sure this is intentional. Kees?
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