Re: linux-next: Tree for December 17 (Radeon DRM BUG)

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Stephen Rothwell wrote:
Hi all,


I get the following BUG in the radeon drm code with today's linux-next when I run "startx". I have not built or tested linux-next in a while, but the problem definitely does not occur in mainline.

Dec 17 20:02:41 winchester [ 43.741709] BUG: unable to handle kernel NULL pointer dereference at 0000000000000000 Dec 17 20:02:41 winchester [ 43.741723] IP: [<ffffffff8038411d>] radeon_cp_init+0x311/0x9f6
Dec 17 20:02:41 winchester [   43.741740] PGD 4d501067 PUD 4d533067 PMD 0
Dec 17 20:02:41 winchester [   43.741747] Oops: 0002 [#1]
Dec 17 20:02:41 winchester [ 43.741751] last sysfs file: /sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0/resource
Dec 17 20:02:41 winchester [   43.741757] CPU 0
Dec 17 20:02:41 winchester [   43.741760] Modules linked in:
Dec 17 20:02:41 winchester [ 43.741766] Pid: 3630, comm: X Not tainted 2.6.28-rc8-next-20081217 #192 Dec 17 20:02:41 winchester [ 43.741771] RIP: 0010:[<ffffffff8038411d>] [<ffffffff8038411d>] radeon_cp_init+0x311/0x9f6 Dec 17 20:02:41 winchester [ 43.741780] RSP: 0018:ffff88004d575e18 EFLAGS: 00010282 Dec 17 20:02:41 winchester [ 43.741784] RAX: ffff88004f36d640 RBX: ffff88004f257400 RCX: ffff88004f36d640 Dec 17 20:02:41 winchester [ 43.741789] RDX: 0000002000000002 RSI: ffff88004f3fd000 RDI: ffff88004f085800 Dec 17 20:02:41 winchester [ 43.741793] RBP: ffff88004d575e38 R08: ffff88004d559600 R09: ffff88004d575ef8 Dec 17 20:02:41 winchester [ 43.741798] R10: 0000000000000000 R11: 0000000000003202 R12: ffff88004f085800 Dec 17 20:02:41 winchester [ 43.741802] R13: ffff88004eb9d500 R14: 0000000000000000 R15: ffff88004eb9db00 Dec 17 20:02:41 winchester [ 43.741808] FS: 00007f845ffa26f0(0000) GS:ffffffff80699e40(0000) knlGS:0000000000000000 Dec 17 20:02:41 winchester [ 43.741813] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b Dec 17 20:02:41 winchester [ 43.741817] CR2: 0000000000000000 CR3: 000000004d55f000 CR4: 00000000000006e0 Dec 17 20:02:41 winchester [ 43.741822] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 Dec 17 20:02:41 winchester [ 43.741826] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Dec 17 20:02:41 winchester [ 43.741832] Process X (pid: 3630, threadinfo ffff88004d574000, task ffff88004f287330)
Dec 17 20:02:41 winchester [   43.741835] Stack:
Dec 17 20:02:41 winchester [ 43.741838] 00000000fffffff4 0000000040786440 ffff88004f085800 ffffffff80383e0c Dec 17 20:02:41 winchester [ 43.741845] ffff88004d575e98 ffffffff8037249e ffff88004d575e48 ffff88004d575e48 Dec 17 20:02:41 winchester [ 43.741852] 00007fff67fbf5a0 ffff88004eb9d500 ffff88004f08583c ffff88004d559600
Dec 17 20:02:41 winchester [   43.741860] Call Trace:
Dec 17 20:02:41 winchester [ 43.741865] [<ffffffff80383e0c>] ? radeon_cp_init+0x0/0x9f6 Dec 17 20:02:41 winchester [ 43.741871] [<ffffffff8037249e>] drm_ioctl+0x1de/0x270 Dec 17 20:02:41 winchester [ 43.741881] [<ffffffff80298d2e>] vfs_ioctl+0x4a/0x55 Dec 17 20:02:41 winchester [ 43.741890] [<ffffffff8029911a>] do_vfs_ioctl+0x3b2/0x3ff Dec 17 20:02:41 winchester [ 43.741896] [<ffffffff8028d0fa>] ? fsnotify_modify+0x4e/0x53 Dec 17 20:02:41 winchester [ 43.741904] [<ffffffff802991ac>] sys_ioctl+0x45/0x80 Dec 17 20:02:41 winchester [ 43.741910] [<ffffffff8028de98>] ? sys_write+0x62/0x72 Dec 17 20:02:41 winchester [ 43.741917] [<ffffffff8020b94b>] system_call_fastpath+0x16/0x1b Dec 17 20:02:41 winchester [ 43.741925] Code: 00 00 49 8b 45 60 48 89 83 f8 00 00 00 49 8b 45 68 48 89 83 00 01 00 00 49 8b 45 70 48 89 83 08 01 00 00 e8 7e da fe ff 48 85 c0 <49> 89 06 48 c7 c6 b0 4e 4d 80 48 c7 c7 13 4a 5c 80 0f 84 a7 fd Dec 17 20:02:41 winchester [ 43.741970] RIP [<ffffffff8038411d>] radeon_cp_init+0x311/0x9f6
Dec 17 20:02:41 winchester [   43.741977]  RSP <ffff88004d575e18>
Dec 17 20:02:41 winchester [   43.741980] CR2: 0000000000000000
Dec 17 20:02:41 winchester [ 43.741984] ---[ end trace dc6d31ddec008340 ]--- Dec 17 20:02:41 winchester [ 43.761235] [drm:drm_release] *ERROR* Device busy: 1

What other information can I provide?

--
Kevin Winchester

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