Created attachment 369286 [details]
Current full dmesg

Description of problem:

WARNING: at lib/list_debug.c:30 __list_add+0x44/0x5c() (Not tainted)
Hardware name: Dimension 4700
list_add corruption. prev->next should be next (f712f8f8), but was f01244b0. (prev=f01244b0).
Modules linked in: fuse nfs fscache ipt_MASQUERADE iptable_nat nf_nat bridge stp llc nfsd lockd nfs_acl auth_rpcgss exportfs sunrpc autofs4 ipv6 p4_clockmod dm_multipath snd_intel8x0 snd_ac97_codec snd_usb_audio ac97_bus snd_seq ppdev snd_pcm e100 mii parport_pc parport uvcvideo videodev v4l1_compat i2c_i801 snd_timer snd_usb_lib iTCO_wdt snd_page_alloc iTCO_vendor_support snd_rawmidi snd_seq_device dcdbas snd_hwdep snd soundcore usb_storage radeon ttm drm_kms_helper drm i2c_algo_bit i2c_core [last unloaded: microcode]
Pid: 1587, comm: X Not tainted 2.6.31.5-127.fc12.i686.PAE #1
Call Trace:
 [<c043db03>] warn_slowpath_common+0x70/0x87
 [<c05a653c>] ? __list_add+0x44/0x5c
 [<c043db58>] warn_slowpath_fmt+0x29/0x2c
 [<c05a653c>] __list_add+0x44/0x5c
 [<f7f5797f>] radeon_object_create+0x16f/0x17c [radeon]
 [<f7f613a8>] radeon_gem_object_create+0x6b/0xc7 [radeon]
 [<f7f61458>] radeon_gem_create_ioctl+0x54/0xcc [radeon]
 [<f7e68a45>] drm_ioctl+0x205/0x2a8 [drm]
 [<f7f61404>] ? radeon_gem_create_ioctl+0x0/0xcc [radeon]
 [<c056ce8d>] ? inode_has_perm+0x69/0x84
 [<c056cf31>] ? file_has_perm+0x89/0xa3
 [<c04d33ce>] vfs_ioctl+0x5c/0x76
 [<c04d392e>] do_vfs_ioctl+0x498/0x4d6
 [<c056d1d5>] ? selinux_file_ioctl+0x43/0x46
 [<c04d39b2>] sys_ioctl+0x46/0x66
 [<c040905c>] syscall_call+0x7/0xb

Version-Release number of selected component (if applicable):
2.6.31.5-127.fc12.i686.PAE
xorg-x11-drv-ati-6.13.0-0.10.20091006git457646d73.fc12.i686
01:00.0 VGA compatible controller: ATI Technologies Inc RV370 [Sapphire X550 Silent]


How reproducible:
Happens fairly regularly.  Haven't linked it to any activity yet.