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restorer: Calculate self-stack size with guard pages

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Otherwise we might not unmap the whole stack leaving
a guard page in restoree memory map. Not a big deal
but anyway.

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
This commit is contained in:
Cyrill Gorcunov 2012-07-24 14:06:30 +04:00 committed by Pavel Emelyanov
parent 95c593a618
commit df81acafa7
1 changed files with 7 additions and 0 deletions
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7
restorer.c
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@ -301,6 +301,13 @@ long __export_restore_task(struct task_restore_core_args *args)
if (!vma_entry_is(vma_entry, VMA_AREA_REGULAR)) if (!vma_entry_is(vma_entry, VMA_AREA_REGULAR))
continue; continue;
/*
* The kernel doesn't show stack guard pages on
* proc output, so add pages here by hands.
*/
if (vma_entry_is(vma_entry, VMA_AREA_STACK))
vma_entry->start -= PAGE_SIZE;
if (sys_munmap((void *)vma_entry->start, vma_entry_len(vma_entry))) { if (sys_munmap((void *)vma_entry->start, vma_entry_len(vma_entry))) {
write_num_n(__LINE__); write_num_n(__LINE__);
goto core_restore_end; goto core_restore_end;