Commit-ID: cd026ca2861e7f384d677626a483da797c76b9da Gitweb: https://git.kernel.org/tip/cd026ca2861e7f384d677626a483da797c76b9da Author: Jia Zhang <zhang.jia@xxxxxxxxxxxxxxxxx> AuthorDate: Mon, 12 Feb 2018 22:44:54 +0800 Committer: Ingo Molnar <mingo@xxxxxxxxxx> CommitDate: Tue, 13 Feb 2018 09:15:59 +0100 x86/mm/kcore: Add vsyscall page to /proc/kcore conditionally The vsyscall page should be visible only if vsyscall=emulate/native when dumping /proc/kcore. Signed-off-by: Jia Zhang <zhang.jia@xxxxxxxxxxxxxxxxx> Reviewed-by: Jiri Olsa <jolsa@xxxxxxxxxx> Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx> Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Cc: jolsa@xxxxxxxxxx Link: http://lkml.kernel.org/r/1518446694-21124-3-git-send-email-zhang.jia@xxxxxxxxxxxxxxxxx Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx> --- arch/x86/mm/init_64.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c index 6aa33d1..8ba9c31 100644 --- a/arch/x86/mm/init_64.c +++ b/arch/x86/mm/init_64.c @@ -1193,7 +1193,8 @@ 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); } -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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