Re: [RFC PATCH v2 23/27] mm/mmap: Add IBT bitmap size to address space limit check
From: Dave Hansen <dave.hansen@linux.intel.com>
Date: 2018-07-10 23:57:45
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linux-api, linux-arch, linux-mm, lkml
On 07/10/2018 03:26 PM, Yu-cheng Yu wrote:
The indirect branch tracking legacy bitmap takes a large address space. This causes may_expand_vm() failure on the address limit check. For a IBT-enabled task, add the bitmap size to the address limit.
This appears to require that we set up current->thread.cet.ibt_bitmap_size _before_ calling may_expand_vm(). What keeps the ibt_mmap() itself from hitting the address limit? -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html