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
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:	Wed,  7 Nov 2012 09:58:40 +0000 (UTC)
Subject: [Bug 45621] Kernel ooops: BUG: unable to handle kernel paging
 request at 000000080000001c

Ivan Shapovalov <> changed:

           What    |Removed                     |Added
                 CC|                            |

--- Comment #7 from Ivan Shapovalov <>  2012-11-07 09:58:39 ---
This (or similar) seems to be reproducible with reiser4 (another out-of-tree
filesystem) on a custom kernel.

1) on newly allocated pages, sometimes page_private(pg) != 0ul
2) sometimes BUGs happen on 0000_0000_0000_000e in a following scenario:
pg = find_or_create_page(...);
// check for pg != NULL
// pg->mapping is accessed

Happens 2-3 times a day. Also different BUGs happened (addresses 0016, 00b0,
0f91) but the backtraces seem to be invalid and I can't describe the actual
in-code scenario.

Directly observed on kernels 3.2 to latest stable (but current reiser4
maintainer, Edward Shishkin, seen this on 2.6.39 - though just 1-2 times at

In my case, the kernel is vanilla + -ck patchset + various config changes (KSM,
big pagetables, cleancache+frontswap+zcache, sparse memory model, transparent
The config is here:
Hardware is Acer 3830TG (HM65 chipset, SNB cpu, 4 GB of RAM). Running in x86_64

I know that this is too small level of detail - but can anything be done to
track down/collect more info?

Configure bugmail:
------- You are receiving this mail because: -------
You are watching the assignee of the bug.
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to
More majordomo info at

Powered by blists - more mailing lists