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vdso/restorer: Don't map compatible vdso if it was unmapped

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If there is no vdso in images - we don't need to map it.

Signed-off-by: Dmitry Safonov <dsafonov@virtuozzo.com>
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>
This commit is contained in:
Dmitry Safonov 2017-07-17 15:39:59 +03:00 committed by Andrei Vagin
parent 8459a3de9d
commit 3f6cce9850
1 changed files with 16 additions and 9 deletions
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25
criu/pie/restorer.c
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@ -1134,24 +1134,29 @@ static int wait_zombies(struct task_restore_args *task_args)
return 0;
}
static bool vdso_needs_parking(struct task_restore_args *args)
static bool vdso_unmapped(struct task_restore_args *args)
{
unsigned int i;
/* Compatible vDSO will be mapped, not moved */
if (args->compatible_mode)
return false;
/* Don't park rt-vdso or rt-vvar if dumpee doesn't have them */
for (i = 0; i < args->vmas_n; i++) {
VmaEntry *vma = &args->vmas[i];
if (vma_entry_is(vma, VMA_AREA_VDSO) ||
vma_entry_is(vma, VMA_AREA_VVAR))
return true;
return false;
}
return false;
return true;
}
static bool vdso_needs_parking(struct task_restore_args *args)
{
/* Compatible vDSO will be mapped, not moved */
if (args->compatible_mode)
return false;
return !vdso_unmapped(args);
}
/*
@ -1222,8 +1227,10 @@ long __export_restore_task(struct task_restore_args *args)
goto core_restore_end;
/* Map compatible vdso */
if (args->compatible_mode && vdso_map_compat(args->vdso_rt_parked_at))
goto core_restore_end;
if (!vdso_unmapped(args) && args->compatible_mode) {
if (vdso_map_compat(args->vdso_rt_parked_at))
goto core_restore_end;
}
/* Shift private vma-s to the left */
for (i = 0; i < args->vmas_n; i++) {