Hello Pratyush, Thanks for your report, I have received this. I'm on vacation until Mar 8, I'll review it when I return from vacation. Thanks, Atsushi Kumagai >Hi All, > >We came across another failure in makedumpfile when kaslr is enabled. This >failure occurs when we try re-filtering. We try to erase some symbol from a >dumpfile which was copied/compressed from /proc/vmcore using makedumpfile. > >We have very limited symbol information in vmcoreinfo. So symbols to be >erased may not be available in vmcoreinfo and we look for it in vmlinux. >However, symbol address from vmlinux is a static address which differs >from run time address with KASLR_OFFSET. Therefore, reading any "virtual >address of vmlinux" from vmcore is not possible. > >These patches finds runtime KASLR offset and then calculates run time >address of symbols read from vmlinux. > >Since, I am not an expert of x86, and these patches touch x86 part of >makedumpfile, therefore I have CCed x86 experts. Please, provide your >review comment and let me know if you think there could have been a better >way to resolve this issue. > >thanks > >~Pratyush > >Pratyush Anand (2): > makedumpfile: add runtime kaslr offset if it exists > x86_64: calculate page_offset in case of re-filtering > > arch/x86_64.c | 45 +++++++++++++++++++++++++++++++++++++++++++-- > erase_info.c | 1 + > makedumpfile.c | 44 ++++++++++++++++++++++++++++++++++++++++++++ > makedumpfile.h | 15 +++++++++++++++ > 4 files changed, 103 insertions(+), 2 deletions(-) > >-- >2.9.3
