[Bug 17241] New: Enabling KMS on Radeon X300 gives NULL pointer dereference

[<bug...@bu...>]

https://bugzilla.kernel.org/show_bug.cgi?id=17241

           Summary: Enabling KMS on Radeon X300 gives NULL pointer
                    dereference
           Product: Drivers
           Version: 2.5
    Kernel Version: 2.6.35.2
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
        AssignedTo: dri...@ke...
        ReportedBy: bu...@is...
        Regression: No


Created an attachment (id=28241)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=28241)
bigger part of kern.log

When I modprobe radeon with modeset=1 I just got a blank screen and had to
restart.
While inspecting the logs, I runned into this:

Aug 29 03:44:31 kamca kernel: [ 2653.857884] [drm] Module unloaded
Aug 29 03:45:06 kamca kernel: [ 2688.601769] [drm] radeon kernel modesetting
enabled.
Aug 29 03:45:06 kamca kernel: [ 2688.601900] radeon 0000:01:00.0: setting
latency timer to 64
Aug 29 03:45:06 kamca kernel: [ 2688.606924] [drm] initializing kernel
modesetting (RV380 0x1002:0x5460).
Aug 29 03:45:06 kamca kernel: [ 2688.607203] [drm] register mmio base:
0xB0100000
Aug 29 03:45:06 kamca kernel: [ 2688.607279] [drm] register mmio size: 65536
Aug 29 03:45:06 kamca kernel: [ 2688.607527] [drm] Generation 2 PCI interface,
using max accessible memory
Aug 29 03:45:06 kamca kernel: [ 2688.607607] radeon 0000:01:00.0: VRAM: 64M
0xC0000000 - 0xC3FFFFFF (64M used)
Aug 29 03:45:06 kamca kernel: [ 2688.607685] radeon 0000:01:00.0: GTT: 512M
0xA0000000 - 0xBFFFFFFF
Aug 29 03:45:06 kamca kernel: [ 2688.607797] radeon 0000:01:00.0: irq 43 for
MSI/MSI-X
Aug 29 03:45:06 kamca kernel: [ 2688.607802] [drm] radeon: using MSI.
Aug 29 03:45:06 kamca kernel: [ 2688.607891] [drm] radeon: irq initialized.
Aug 29 03:45:06 kamca kernel: [ 2688.608944] [drm] Detected VRAM RAM=64M,
BAR=128M
Aug 29 03:45:06 kamca kernel: [ 2688.609074] [drm] RAM width 64bits DDR
Aug 29 03:45:06 kamca kernel: [ 2688.609202] [TTM] Zone  kernel: Available
graphics memory: 447356 kiB.
Aug 29 03:45:06 kamca kernel: [ 2688.609280] [TTM] Zone highmem: Available
graphics memory: 516416 kiB.
Aug 29 03:45:06 kamca kernel: [ 2688.609355] [TTM] Initializing pool allocator.
Aug 29 03:45:06 kamca kernel: [ 2688.609447] [drm] radeon: 64M of VRAM memory
ready
Aug 29 03:45:06 kamca kernel: [ 2688.609520] [drm] radeon: 512M of GTT memory
ready.
Aug 29 03:45:06 kamca kernel: [ 2688.609596] [drm] GART: num cpu pages 131072,
num gpu pages 131072
Aug 29 03:45:06 kamca kernel: [ 2688.610647] [drm] radeon: 1 quad pipes, 1 Z
pipes initialized.
Aug 29 03:45:06 kamca kernel: [ 2688.612289] [drm] PCIE GART of 512M enabled
(table at 0xC0040000).
Aug 29 03:45:06 kamca kernel: [ 2688.612761] [drm] Loading R300 Microcode
Aug 29 03:45:06 kamca kernel: [ 2688.617641] [drm] radeon: ring at
0x00000000A0000000
Aug 29 03:45:06 kamca kernel: [ 2688.617740] [drm] ring test succeeded in 1
usecs
Aug 29 03:45:06 kamca kernel: [ 2688.617933] [drm] radeon: ib pool ready.
Aug 29 03:45:06 kamca kernel: [ 2688.619249] [drm] ib test succeeded in 0 usecs
Aug 29 03:45:06 kamca kernel: [ 2688.619678] [drm] DFP table revision: 4
Aug 29 03:45:06 kamca kernel: [ 2688.620044] [drm] Panel ID String: SXGA+
Single (85MHz)    
Aug 29 03:45:06 kamca kernel: [ 2688.620122] [drm] Panel Size 1400x1050
Aug 29 03:45:06 kamca kernel: [ 2688.620222] [drm] Default TV standard: NTSC
Aug 29 03:45:06 kamca kernel: [ 2688.620294] [drm] 27.000000000 MHz TV ref clk
Aug 29 03:45:06 kamca kernel: [ 2688.620382] BUG: unable to handle kernel NULL
pointer dereference at 00000218
Aug 29 03:45:06 kamca kernel: [ 2688.620534] IP: [<f80d1deb>]
drm_sysfs_connector_add+0x1b/0x210 [drm]
Aug 29 03:45:06 kamca kernel: [ 2688.620657] *pde = 00000000 
Aug 29 03:45:06 kamca kernel: [ 2688.620766] Oops: 0000 [#1] PREEMPT 
Aug 29 03:45:06 kamca kernel: [ 2688.620913] last sysfs file:
/sys/devices/i2c-2/uevent
Aug 29 03:45:06 kamca kernel: [ 2688.620987] Modules linked in: radeon(+)
uhci_hcd ehci_hcd lib80211_crypt_ccmp ttm drm_kms_helper drm agpgart
i2c_algo_bit cfbcopyarea cfbimgblt cfbfillrect acpi_cpufreq mperf joydev hdaps
uinput fuse nfsd exportfs nfs lockd fscache nfs_acl auth_rpcgss sunrpc
snd_intel8x0 snd_ac97_codec ac97_bus snd_pcm_oss snd_mixer_oss snd_pcm
snd_seq_dummy snd_seq_oss snd_seq_midi_event snd_seq pcmcia snd_timer
thinkpad_acpi ipw2200 led_class nvram snd_seq_device parport_pc snd libipw tg3
sg yenta_socket libphy lib80211 i2c_i801 snd_page_alloc psmouse usbcore evdev
pcspkr [last unloaded: radeon]
Aug 29 03:45:06 kamca kernel: [ 2688.621006] 
Aug 29 03:45:06 kamca kernel: [ 2688.621006] Pid: 4466, comm: modprobe Not
tainted 2.6.35.2-t43-kamca-3 #4 2668E16/2668E16
Aug 29 03:45:06 kamca kernel: [ 2688.621006] EIP: 0060:[<f80d1deb>] EFLAGS:
00010246 CPU: 0
Aug 29 03:45:06 kamca kernel: [ 2688.621006] EIP is at
drm_sysfs_connector_add+0x1b/0x210 [drm]
Aug 29 03:45:06 kamca kernel: [ 2688.621006] EAX: 00000000 EBX: ecf6a800 ECX:
00000004 EDX: e8525d70
Aug 29 03:45:06 kamca kernel: [ 2688.621006] ESI: ee32b400 EDI: 00000000 EBP:
e8525de4 ESP: e8525cbc
Aug 29 03:45:06 kamca kernel: [ 2688.621006]  DS: 007b ES: 007b FS: 0000 GS:
0033 SS: 0068
Aug 29 03:45:06 kamca kernel: [ 2688.621006] Process modprobe (pid: 4466,
ti=e8524000 task=f659da80 task.ti=e8524000)
Aug 29 03:45:06 kamca kernel: [ 2688.621006] Stack:
Aug 29 03:45:06 kamca kernel: [ 2688.621006]  f82062d7 ecf6a800 e864e800
00000006 00000004 e8525d70 00000007 ee316000
Aug 29 03:45:06 kamca kernel: [ 2688.621006] <0> ecf6a800 00000007 000000ff
e8525de4 f81f57f1 00000006 e8525d70 00000007
Aug 29 03:45:06 kamca kernel: [ 2688.621006] <0> e8525dbc e8525d2e c1432b3e
00000a80 e8525d70 00000001 00000002 000008dd
Aug 29 03:45:06 kamca kernel: [ 2688.621006] Call Trace:
Aug 29 03:45:06 kamca kernel: [ 2688.621006]  [<f82062d7>] ?
radeon_add_legacy_connector+0xa7/0x3d0 [radeon]
Aug 29 03:45:06 kamca kernel: [ 2688.621006]  [<f81f57f1>] ?
radeon_get_legacy_connector_info_from_bios+0x571/0xe30 [radeon]
Aug 29 03:45:06 kamca kernel: [ 2688.621006]  [<f80d6428>] ?
drm_mode_crtc_set_gamma_size+0x18/0x40 [drm]
Aug 29 03:45:06 kamca kernel: [ 2688.621006]  [<f820aea2>] ?
radeon_modeset_init+0x222/0x6f0 [radeon]
Aug 29 03:45:06 kamca kernel: [ 2688.621006]  [<f81e9d1e>] ?
radeon_device_init+0x28e/0x370 [radeon]
Aug 29 03:45:06 kamca kernel: [ 2688.621006]  [<f81e8d70>] ?
radeon_vga_set_decode+0x0/0x20 [radeon]
Aug 29 03:45:06 kamca kernel: [ 2688.621006]  [<f81eb17d>] ?
radeon_driver_load_kms+0x7d/0x150 [radeon]
Aug 29 03:45:06 kamca kernel: [ 2688.621006]  [<f80cf94a>] ?
drm_get_dev+0x28a/0x470 [drm]
Aug 29 03:45:06 kamca kernel: [ 2688.621006]  [<c10e607c>] ?
sysfs_add_one+0x1c/0xb0
Aug 29 03:45:06 kamca kernel: [ 2688.621006]  [<c10e5943>] ?
sysfs_addrm_finish+0x13/0xb0
Aug 29 03:45:06 kamca kernel: [ 2688.621006]  [<c11c8d9b>] ?
local_pci_probe+0xb/0x10
Aug 29 03:45:06 kamca kernel: [ 2688.621006]  [<c11ca259>] ?
pci_device_probe+0x69/0x90
Aug 29 03:45:06 kamca kernel: [ 2688.621006]  [<c1232835>] ?
driver_probe_device+0x85/0x1a0
Aug 29 03:45:06 kamca kernel: [ 2688.621006]  [<c10e622a>] ?
sysfs_create_dir+0x6a/0xb0
Aug 29 03:45:06 kamca kernel: [ 2688.621006]  [<c12329c9>] ?
__driver_attach+0x79/0x80
Aug 29 03:45:06 kamca kernel: [ 2688.621006]  [<c1232950>] ?
__driver_attach+0x0/0x80
Aug 29 03:45:06 kamca kernel: [ 2688.621006]  [<c1231e52>] ?
bus_for_each_dev+0x52/0x80
Aug 29 03:45:06 kamca kernel: [ 2688.621006]  [<c12326b6>] ?
driver_attach+0x16/0x20
Aug 29 03:45:06 kamca kernel: [ 2688.621006]  [<c1232950>] ?
__driver_attach+0x0/0x80
Aug 29 03:45:06 kamca kernel: [ 2688.621006]  [<c12320b2>] ?
bus_add_driver+0xa2/0x260
Aug 29 03:45:06 kamca kernel: [ 2688.621006]  [<c11c8e00>] ?
pci_device_shutdown+0x0/0x30
Aug 29 03:45:06 kamca kernel: [ 2688.621006]  [<c11c9c10>] ?
pci_device_remove+0x0/0x40
Aug 29 03:45:06 kamca kernel: [ 2688.621006]  [<c1232c63>] ?
driver_register+0x63/0x120
Aug 29 03:45:06 kamca kernel: [ 2688.621006]  [<f80ca7b0>] ?
drm_init+0x30/0x100 [drm]
Aug 29 03:45:06 kamca kernel: [ 2688.621006]  [<f80b2000>] ?
radeon_init+0x0/0xb0 [radeon]
Aug 29 03:45:06 kamca kernel: [ 2688.621006]  [<c11c9ca6>] ?
__pci_register_driver+0x36/0xa0
Aug 29 03:45:06 kamca kernel: [ 2688.621006]  [<c100111f>] ?
do_one_initcall+0x2f/0x190
Aug 29 03:45:06 kamca kernel: [ 2688.621006]  [<c1056731>] ?
sys_init_module+0xa1/0x1e0
Aug 29 03:45:06 kamca kernel: [ 2688.621006]  [<c1098867>] ?
sys_close+0x67/0xe0
Aug 29 03:45:06 kamca kernel: [ 2688.621006]  [<c1002d10>] ?
sysenter_do_call+0x12/0x26
Aug 29 03:45:06 kamca kernel: [ 2688.621006] Code: e8 ab 2b 0e c9 83 c4 10 5b
c3 8d b6 00 00 00 00 55 57 56 89 c6 53 83 ec 20 8b 38 0f b6 40 2c d0 e8 24 01
84 c0 0f 85 e7 01 00 00 <8b> 87 18 02 00 00 ba 40 1a 0d f8 bb 2e b6 0d f8 bd b6
ab 0d f8 
Aug 29 03:45:06 kamca kernel: [ 2688.621006] EIP: [<f80d1deb>]
drm_sysfs_connector_add+0x1b/0x210 [drm] SS:ESP 0068:e8525cbc
Aug 29 03:45:06 kamca kernel: [ 2688.621006] CR2: 0000000000000218
Aug 29 03:45:06 kamca kernel: [ 2688.640635] ---[ end trace d49ccd528317b550
]---

Running Debian testing on Thinkpad T43 with own kernel.

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