| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Thu, 09 Apr 2015 19:35:53 +0530 From: Susheel Khiani <skhiani@...eaurora.org> To: akpm@...ux-foundation.org, peterz@...radead.org, neilb@...e.de, dhowells@...hat.com, hughd@...gle.com, paulmcquad@...il.com, linux-mm@...ck.org, linux-kernel@...r.kernel.org Subject: [Question] ksm: rmap_item pointing to some stale vmas Hi, We are seeing an issue during try_to_unmap_ksm where in call to try_to_unmap_one is failing. try_to_unmap_ksm in this particular case is trying to go through vmas associated with each rmap_item->anon_vma. What we see is this that the corresponding page is not mapped to any of the vmas associated with 2 rmap_item. The associated rmap_item in this case looks like pointing to some valid vma but the said page is not found to be mapped under it. try_to_unmap_one thus fails to find valid ptes for these vmas. At the same time we can see that the page actually is mapped in 2 separate and different vmas which are not part of rmap_item associated with page. So whether rmap_item is pointing to some stale vmas and now the mapping has changed? Or there is something else going on here. p Any pointer would be appreciated. -- Susheel Khiani QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, hosted by The Linux Foundation -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists