| 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: Wed, 21 Feb 2007 05:49:38 +0100 (CET) From: Nick Piggin <npiggin@...e.de> To: Linux Memory Management <linux-mm@...ck.org>, Andrew Morton <akpm@...l.org> Cc: Linux Kernel <linux-kernel@...r.kernel.org>, Nick Piggin <npiggin@...e.de>, Benjamin Herrenschmidt <benh@...nel.crashing.org> Subject: [patch 0/6] fault vs truncate/invalidate race fix The following set of patches are based on current git. These fix the fault vs invalidate and fault vs truncate_range race for filemap_nopage mappings, plus those and fault vs truncate race for nonlinear mappings. These patches fix silent data corruption that we've had several people hitting in SUSE kernels. Our kernels have similar patches to lock the page over page fault, and no problem. I've also got rid of the horrible populate API, and integrated nonlinear pages properly with the page fault path. Downside is that this adds one more vector through which the buffered write deadlock can occur. However this is just a very tiny one (pte being unmapped for reclaim), compared to all the other ways that deadlock can occur (unmap, reclaim, truncate, invalidate). I doubt it will be noticable. At any rate, it is better than data corruption. I hope these can get merged (at least into -mm) soon. Thanks, Nick -- SuSE Labs - 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