Running a kernel based on the Rafael's -next tree, under VMware, I get the following oops while booting:
Entering kdb (current=0xd73e2f70, pid 1024) on processor 0 Oops: (null) due to oops @ 0xc108bc94 <d>Modules linked in: ext4 jbd2 crc16 mptspi mptscsih mptbase <c> <d>Pid: 1024, comm: plymouthd Not tainted 2.6.36-rc4+ #60 440BX Desktop Reference Platform/VMware Virtual Platform <d>EIP: 0060:[<c108bc94>] EFLAGS: 00010246 CPU: 0 EIP is at kfree+0x36/0x88 <d>EAX: c146ccbd EBX: dc46e980 ECX: 40000400 EDX: c182cd80 <d>ESI: dfabf800 EDI: dfabf8c0 EBP: dfa7befc ESP: dfa7beec <d> DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 <0>Process plymouthd (pid: 1024, ti=dfa7a000 task=d73e2f70 task.ti=dfa7a000) <0>Stack: dfabf800 dc46e980 dfabf800 dfabf8c0 dfa7bf18 c11c4ea0 c11d237c dfabf8c0 <0> dc46e980 c11c4e13 c11d5bd9 dfa7bf28 c113d3d1 dc437468 dc46e780 dfa7bf34 <0> c11c4d9d dc437468 dfa7bf40 c11d5f35 dfabf800 dfa7bf68 c11c1e3e dfabf800 <0>Call Trace: <0> [<c11c4ea0>] ? drm_master_destroy+0x8d/0xf0 <0> [<c11d237c>] ? ttm_object_file_destroy+0x0/0xd <0> [<c11c4e13>] ? drm_master_destroy+0x0/0xf0 <0> [<c11d5bd9>] ? vmw_master_drop+0x0/0x76 <0> [<c113d3d1>] ? kref_put+0x39/0x42 <0> [<c11c4d9d>] ? drm_master_put+0x12/0x1b [0]more> Only 'q' or 'Q' are processed at more prompt, input ignored <0> [<c11d5f35>] ? vmw_postclose+0x1b/0x25 <0> [<c11c1e3e>] ? drm_release+0x459/0x4cb <0> [<c1091274>] ? fput+0xcc/0x1b1 <0> [<c108ec5b>] ? filp_close+0x51/0x5b <0> [<c108ecbf>] ? sys_close+0x5a/0x88 <0> [<c1002690>] ? sysenter_do_call+0x12/0x26 <0>Code: 10 76 72 8d 90 00 00 00 40 c1 ea 0c c1 e2 05 03 15 00 1b 7e c1 66 83 3a 00 79 03 8b 52 0c 8b 0a 84 c9 78 14 66 f7 c1 00 c0 75 04 <0f> 0b eb fe 89 d0 e8 0a 3a fe ff eb 3d 8b 75 04 8b 5a 0c 9c 8f Call Trace: [<c11c4ea0>] drm_master_destroy+0x8d/0xf0 [<c11d237c>] ? ttm_object_file_destroy+0x0/0xd [<c11c4e13>] ? drm_master_destroy+0x0/0xf0 [<c11d5bd9>] ? vmw_master_drop+0x0/0x76 [<c113d3d1>] kref_put+0x39/0x42 [<c11c4d9d>] drm_master_put+0x12/0x1b [<c11d5f35>] vmw_postclose+0x1b/0x25 [<c11c1e3e>] drm_release+0x459/0x4cb [<c1091274>] fput+0xcc/0x1b1 [<c108ec5b>] filp_close+0x51/0x5b [<c108ecbf>] sys_close+0x5a/0x88 [<c1002690>] sysenter_do_call+0x12/0x26
This oops is caused by vmwgfx setting it's dev->devicename to a static char * instead of kmallocing memory. The kfree that's done in drm_master_destroy then explodes :)
Signed-off-by: Nigel Cunningham nigel@tuxonice.net
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c index 72ec2e2..1ca0ebc 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c @@ -343,8 +343,16 @@ static int vmw_driver_load(struct drm_device *dev, unsigned long chipset)
dev->dev_private = dev_priv;
- if (!dev->devname) - dev->devname = vmw_devname; + if (!dev->devname) { + dev->devname = kmalloc(strlen(vmw_devname) + 1, GFP_KERNEL); + if (!dev->devname) { + DRM_ERROR("Unable to allocate memory for device " + "name.\n"); + ret = -ENOMEM; + goto out_err4; + } + strcpy(dev->devname, vmw_devname); + }
if (dev_priv->capabilities & SVGA_CAP_IRQMASK) { ret = drm_irq_install(dev);