Messages in this thread Patch in this message | | | From | Jia Zhang <> | Subject | [PATCH 2/2] x86/mm/64: Add vsyscall page to /proc/kcore conditionally | Date | Mon, 12 Feb 2018 22:44:54 +0800 |
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The vsyscall page should be visible only if vsyscall=emulate/native when dumping /proc/kcore.
Signed-off-by: Jia Zhang <zhang.jia@linux.alibaba.com> Reviewed-by: Jiri Olsa <jolsa@kernel.org> --- arch/x86/mm/init_64.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c index 14cd7f8..cbd6ea4 100644 --- a/arch/x86/mm/init_64.c +++ b/arch/x86/mm/init_64.c @@ -1193,8 +1193,10 @@ void __init mem_init(void) register_page_bootmem_info(); /* Register memory areas for /proc/kcore */ - kclist_add(&kcore_vsyscall, (void *)VSYSCALL_ADDR, - PAGE_SIZE, KCORE_USER); + if (get_gate_vma(&init_mm)) { + kclist_add(&kcore_vsyscall, (void *)VSYSCALL_ADDR, + PAGE_SIZE, KCORE_USER); + } mem_init_print_info(NULL); } -- 1.8.3.1
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