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 v1->v2: - reading KERNELOFFSET from vmcoreinfo now instead of calculating it from _stext 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 | 58 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++-- erase_info.c | 1 + makedumpfile.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++ makedumpfile.h | 16 ++++++++++++++++ 4 files changed, 124 insertions(+), 2 deletions(-) -- 2.9.3
