diff options
| author | Jia Zhang <[email protected]> | 2018-02-12 22:44:54 +0800 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2018-02-13 09:15:59 +0100 |
| commit | cd026ca2861e7f384d677626a483da797c76b9da (patch) | |
| tree | 5e6fccb5526b952ff08bb2718b2c50f952ee8474 | |
| parent | 595dd46ebfc10be041a365d0a3fa99df50b6ba73 (diff) | |
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 <[email protected]>
Reviewed-by: Jiri Olsa <[email protected]>
Cc: Al Viro <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
| -rw-r--r-- | arch/x86/mm/init_64.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c index 6aa33d1e198f..8ba9c3128947 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); } |