[PATCH 1/2] /proc/kcore: Fix SMAP violation when dumping vsyscall user page

The commit df04abfd181a ("fs/proc/kcore.c: Add bounce buffer for ktext data") introduces a bounce buffer to work around CONFIG_HARDENED_USERCOPY=y. However, accessing vsyscall user page will cause SMAP violation in this way. In order to fix this issue, simply replace memcpy() with copy_from_user()

Re: [PATCH 1/2] /proc/kcore: Fix SMAP violation when dumping vsyscall user page

Hi Jiri, The maintainers are too busy to review this patchset. You are the author of the commit df04abfd181a. Please help to review this patchset. Thanks, Jia On 2018/1/30 下午2:42, Jia Zhang wrote: > The commit df04abfd181a > ("fs/proc/kcore.c: Add bounce buffer for ktext data") introduces a > bo

Re: [PATCH 1/2] /proc/kcore: Fix SMAP violation when dumping vsyscall user page

Hi, Are there any comments here? Thanks, Jia On 2018/1/30 下午2:42, Jia Zhang wrote: > The commit df04abfd181a > ("fs/proc/kcore.c: Add bounce buffer for ktext data") introduces a > bounce buffer to work around CONFIG_HARDENED_USERCOPY=y. However, > accessing vsyscall user page will cause SMAP vio

[PATCH 1/2] /proc/kcore: Fix SMAP violation when dumping vsyscall user page

The commit df04abfd181a ("fs/proc/kcore.c: Add bounce buffer for ktext data") introduces a bounce buffer to work around CONFIG_HARDENED_USERCOPY=y. However, accessing vsyscall user page will cause SMAP violation in this way. In order to fix this issue, simply replace memcpy() with copy_from_user()