Fix stack grow for init.
During early stages of kern_exec(), including strings copyout, p_textvp for init is NULL. This prevented stack grow from working for init execution. Without stack gap enabled, initial stack segment size is enough for strings passed by kernel to init. With the gap enabled, the used address might fall out of the initial segment, which kills init. Exclude initproc from the check for contexts which should not cause stack grow in the target map. Sponsored by: The FreeBSD Foundation MFC after: 1 week
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svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=350758
@ -4217,7 +4217,8 @@ vm_map_growstack(vm_map_t map, vm_offset_t addr, vm_map_entry_t gap_entry)
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* debugger or AIO daemon. The reason is that the wrong
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* resource limits are applied.
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*/
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if (map != &p->p_vmspace->vm_map || p->p_textvp == NULL)
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if (p != initproc && (map != &p->p_vmspace->vm_map ||
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p->p_textvp == NULL))
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return (KERN_FAILURE);
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MPASS(!map->system_map);
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