Hi all, after some time this issue popped up again. Please note that the patch was send to lkml two times. https://lkml.org/lkml/2013/4/2/297 lkml: <1364905733-23937-1-git-send-email-fhrbata@xxxxxxxxxx> https://lkml.org/lkml/2013/10/2/359 lkml: <20131002160514.GA25471@localhost.localdomain> It did not get much attention, except H. Peter Anvin's complain that having two checks for mmap and read/write for /dev/mem access is ridiculous. I for sure do not object to this, but AFAICT it's not that simple to unify them and it's not "directly" related to the PTE corruption. Please note that there are other archs(ia64, arm) using these check. But I for sure can be missing something. What the patch does is using the existing interface to implement x86 specific check in the least invasive way. Peter: I by no means want to be pushy. Just that after I looked into this a little bit more, I don't see a better and more straightforward way how to fix this. I will be grateful for any suggestions and help. If we want/need to fix this in a different way, I can for sure try, but I will need at least some guidance. So I'm posting this once more with a hope it will get more attention or at least to start the discussion how/if this should be fixed. The patch is the same except I added a check for phys addr overflow before calling phys_addr_valid. Maybe this check should be in do_mmap_pgoff. Many thanks Frantisek Hrbata (1): x86: add phys addr validity check for /dev/mem mmap arch/x86/include/asm/io.h | 4 ++++ arch/x86/mm/mmap.c | 18 ++++++++++++++++++ 2 files changed, 22 insertions(+) -- 1.9.3 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>