fs, elf: make sure to page align bss in load_elf_library
The current code does not make sure to page align bss before calling vm_brk(), and this can lead to a VM_BUG_ON() in __mm_populate() due to the requested lenght not being correctly aligned. Let us make sure to align it properly. Kees: only applicable to CONFIG_USELIB kernels: 32-bit and configured for libc5. Link: http://lkml.kernel.org/r/20180705145539.9627-1-osalvador@techadventures.net Signed-off-by:Oscar Salvador <osalvador@suse.de> Reported-by:
<syzbot+5dcb560fe12aa5091c06@syzkaller.appspotmail.com> Tested-by:
Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp> Acked-by:
Kees Cook <keescook@chromium.org> Cc: Michal Hocko <mhocko@suse.com> Cc: Nicolas Pitre <nicolas.pitre@linaro.org> Cc: <stable@vger.kernel.org> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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fa8cbda8
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