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Date: Tue, 31 Oct 2006 09:51:54 +0100 From: "lkml-2006i-ticket@...core.pl" <lkml-2006i-ticket@...core.pl> To: linux-kernel@...r.kernel.org Subject: 2.6.18.1 + grsecurity JFS failed with dbAllocNext: Corrupt dmap page Hello, on 2.6.18.1 + grsecurity I totally lost an JFS partition. I was doing regular work on freshly installed debian stable (on olerd/rather tested hardware that worked 24/24 7/7) I installed 2.6.18.1 + grsecurity, started memtest and stress in the background, enabled swap with encryption, and played a bit with SysRq - using it to dump CPU state and tasks list (playing around). After a while I got tons of errors like ERROR: (device hda3): DT_GETPAGE: dtree page corrupt ERROR: (device hda3): dbAllocNext: Corrupt dmap page about 10 per second. I rebooted (computer hanged) After reset the partition used - hda3 (as /, it was the only rw mounted partition) was gone, unable to repair "since both master and secondary superblocks are damaged". If anyone is interested I saved first 100 MB of this ~6 GB partition using dd, it looks totally different in hexdump then other partition (at least the begin) so it suggests that indeed superblock and other data was totally shreded / filled with garbage. The config it Althon 1700 with 512 RAM, kernel 2.6.18.1 + grsecurity. Config: in 250 Hz timer frequency, with Voluntary Kernel Preemption, with no privilaged ioports, possible with some additional kernel hackng options (like vm debugging), otherwise config was like the 2.6.18 (but not .1) that run perfectly on other machines. The failure occured during heavy load and stress testing while playing with SysRq at same time (but only non-destructive things like -p -t -m) The smartctrl shows 2 UDMA errors for this device (but they might be very old). Possible that this is hardware fault, but letting now perhaps anyone had simmilar problems... ERROR: (device hda3): DT_GETPAGE: dtree page corrupt ERROR: (device hda3): dbAllocNext: Corrupt dmap page -- LimCore C++ Software Architect / Team Lead ---> oo Linux programs limcore software - 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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