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Message-Id: <201103242330.14416.rjw@sisk.pl> Date: Thu, 24 Mar 2011 23:30:14 +0100 From: "Rafael J. Wysocki" <rjw@...k.pl> To: "richard -rw- weinberger" <richard.weinberger@...il.com> Cc: LKML <linux-kernel@...r.kernel.org>, linux-pm@...ts.linux-foundation.org Subject: Re: Corrupted files after suspend to disk On Thursday, March 24, 2011, richard -rw- weinberger wrote: > On Thu, Mar 24, 2011 at 11:16 AM, richard -rw- weinberger > <richard.weinberger@...il.com> wrote: > > On Thu, Mar 24, 2011 at 12:00 AM, Rafael J. Wysocki <rjw@...k.pl> wrote: > >> On Wednesday, March 23, 2011, richard -rw- weinberger wrote: > >>> On Wed, Mar 23, 2011 at 11:22 PM, Rafael J. Wysocki <rjw@...k.pl> wrote: > >>> > On Wednesday, March 23, 2011, richard -rw- weinberger wrote: > >>> >> On Wed, Mar 23, 2011 at 11:11 PM, Rafael J. Wysocki <rjw@...k.pl> wrote: > >>> >> > On Wednesday, March 23, 2011, richard -rw- weinberger wrote: > >>> >> >> 2011/3/23 Rafael J. Wysocki <rjw@...k.pl>: > >>> >> >> > On Wednesday, March 23, 2011, richard -rw- weinberger wrote: > >>> >> >> >> Hi, > >>> >> >> >> > >>> >> >> >> I'm facing a very strange problem on my netbook (Lenovo Ideapad S10) > >>> >> >> >> running Linux 2.6.37.4. > >>> >> >> >> After resuming from s2disk some files are corrupted. > >>> >> >> >> But when I reboot my netbook everything seems good again. > >>> >> >> >> > >>> >> >> >> When I saw the problem the first time the ls command segfaulted always. > >>> >> >> >> I did a reboot and it worked again. > >>> >> >> >> > >>> >> >> >> A few days later zypper crashed. After a reboot it worked again. > >>> >> >> >> And today ssh crashed. I looked a bit closer and saw it crashed > >>> >> >> >> somewhere within libcrypto. > >>> >> >> >> So I made copy libcrypto and rebooted. > >>> >> >> >> After the reboot ssh worked again but libcrypto and the copy of it hat > >>> >> >> >> a different sha1 sum! > >>> >> >> >> WTF?! > >>> >> >> >> > >>> >> >> >> Is this a known issue? > >>> >> >> > > >>> >> >> > No. > >>> >> >> > > >>> >> >> >> dmesgs and config are attached. > >>> >> >> >> > >>> >> >> >> The used distribution is openSUSE 11.4 with suspend-0.80.20100129-7.1 > >>> >> >> >> (default from suse). > >>> >> >> >> I'm using ext3 as root filesystem. > >>> >> >> >> What else do you need? > >>> >> >> > > >>> >> >> > Whatever you can do to narrow down the problem. At the moment I only know > >>> >> >> > that it's there. > >>> >> >> > >>> >> >> I can reproduce the problem now. > >>> >> >> After ~20 suspend and resume iterations aide finds corrupted files in /lib/. > >>> >> >> It's always a very basic lib like libcrypto, libglib which is used all > >>> >> >> the time on my system. > >>> >> > > >>> >> > Those files are never intentionally modified, right? > >>> >> > > >>> >> >> Maybe it's an issue like this one? > >>> >> >> https://lkml.org/lkml/2010/12/2/339 > >>> >> > > >>> >> > It might have if that patch hadn't been merged before 2.6.37. > >>> >> > > >>> >> > Is the system 32-bit or 64-bit? > >>> >> > >>> >> It's a 32-bit system. > >>> >> cmp shows that the corrupted files differ in many bytes (not scattered). > >>> >> The corrupted bytes are always 0 or 252. > >>> > > >>> > Do I understand correctly that the files apparently corrupted after resume > >>> > are not corrupted any more when you reboot? > >>> > >>> Yes. > >>> Seems like a cache issue. > >> > >> There's a couple things you can check before we start asking other people for > >> help. > >> > >> First, it would be good to know if things change when you save the image > >> into a swap file instead of the swap partition you've been using so far > >> (I believe it's documented quite well how to do that). > >> > >> Second, please verify if using the built-in save/load hibernate code leads > >> to the same issue (you can hibernate by doing "echo disk > /sys/power/state" > >> to verify that). > >> > >> Of course, please test the above separately. :-) > > > > Ok, I'll test this when I'm at home. > > > > BTW: dropping the caches helps, when some files seem corrupted. > > Today /usr/bin/okular was broken. > > After setting vm.drop_caches=1 it worked again. > > > >> Thanks, > >> Rafael > >> -- > >> 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/ > >> > > > > -- > > Thanks, > > //richard > > > > On Linux 2.6.38 I'm unable to reproduce the issue. > Only 2.6.37 seems to be affected. > So, I'm moving over to 2.6.38. :) OK, thanks for the report. :-) Rafael -- 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/
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