On Mon, Jun 23, 2014 at 11:34:04PM -0400, Michael L. Semon wrote: > [ 1068.431391] ------------[ cut here ]------------ > [ 1068.431566] WARNING: CPU: 0 PID: 41 at lib/list_debug.c:59 __list_del_entry+0xce/0x110() > [ 1068.431596] list_del corruption. prev->next should be db5bf580, but was (null) Ok, so the current log item points to a log item that has null pointers (i.e. not on the list). > [ 1068.431629] CPU: 0 PID: 41 Comm: kworker/0:1H Not tainted 3.16.0-rc1+ #3 > [ 1068.431656] Hardware name: Dell Computer Corporation L733r /CA810E , BIOS A14 09/05/2001 > [ 1068.431697] Workqueue: xfslogd xfs_buf_iodone_work > [ 1068.431738] 00000000 00000000 de92fc24 c15d4e76 de92fc68 de92fc58 c103ca33 c1737648 > [ 1068.431891] de92fc84 00000029 c173705a 0000003b c13c3e9e 0000003b c13c3e9e 0000003b > [ 1068.432115] db5bf580 00000001 de92fc70 c103cab3 00000009 de92fc68 c1737648 de92fc84 > [ 1068.432267] Call Trace: > [ 1068.432329] [<c15d4e76>] dump_stack+0x48/0x60 > [ 1068.432386] [<c103ca33>] warn_slowpath_common+0x83/0xa0 > [ 1068.432433] [<c13c3e9e>] ? __list_del_entry+0xce/0x110 > [ 1068.432478] [<c13c3e9e>] ? __list_del_entry+0xce/0x110 > [ 1068.432524] [<c103cab3>] warn_slowpath_fmt+0x33/0x40 > [ 1068.432569] [<c13c3e9e>] __list_del_entry+0xce/0x110 > [ 1068.432615] [<c13c3eeb>] list_del+0xb/0x20 > [ 1068.432674] [<c126eb4d>] xfs_ail_delete+0x1d/0x60 .... > [ 1068.433567] ---[ end trace 60289514948e4bd7 ]--- > [ 1068.433603] BUG: unable to handle kernel NULL pointer dereference at 0000000c > [ 1068.433795] IP: [<c126eac8>] xfs_ail_check+0x58/0xc0 And that's trying to dereference a pointer from an item that is not on the list.... So there's linked list corruption occurring here. > I can reproduce the oops in kernel 3.15.0, perhaps with xfs-oss/for-next > merged, but there's no vmlinux to go with the kernel. Therefore, I'll have > to resort to other means (rebuilt kernel with netconsole, re-attaching the > serial cable, etc.) to get the full crash log. How far back can you reproduce it? If it's a recent occurrence, can you bisect it? Cheers, Dave. -- Dave Chinner david@xxxxxxxxxxxxx _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
