forked from Minki/linux
b74ad5ae14
As we may release the last reference, we need to store the device in a local variable in order to unlock afterwards. [ 60.140768] BUG: unable to handle kernel paging request at 6b6b6b9f [ 60.140973] IP: [<c1536d11>] __mutex_unlock_slowpath+0x5a/0x111 [ 60.141014] *pdpt = 0000000024a54001 *pde = 0000000000000000 [ 60.141014] Oops: 0002 [#1] PREEMPT SMP [ 60.141014] last sysfs file: /sys/devices/LNXSYSTM:00/device:00/PNP0A08:00/PNP0C0A:00/power_supply/BAT0/voltage_now [ 60.141014] Modules linked in: uvcvideo ath9k pegasus ath9k_common ath9k_hw hid_egalax ath3k joydev asus_laptop sparse_keymap battery input_polldev [ 60.141014] [ 60.141014] Pid: 771, comm: meego-ux-daemon Not tainted 2.6.37.2-7.1 #1 EXOPC EXOPG06411/EXOPG06411 [ 60.141014] EIP: 0060:[<c1536d11>] EFLAGS: 00010046 CPU: 0 [ 60.141014] EIP is at __mutex_unlock_slowpath+0x5a/0x111 [ 60.141014] EAX: 00000100 EBX: 6b6b6b9b ECX: e9b4a1b0 EDX: e4a4e580 [ 60.141014] ESI: db162558 EDI: 00000246 EBP: e480be50 ESP: e480be44 [ 60.141014] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 [ 60.141014] Process meego-ux-daemon (pid: 771, ti=e480a000 task=e9b4a1b0 task.ti=e480a000) [ 60.141014] Stack: [ 60.141014] e4a4e580 db162558 f5a2f838 e480be58 c1536dd0 e480be68 c125ab1b db162558 [ 60.141014] db1624e0 e480be78 c10ba071 db162558 f760241c e480be94 c10bb0bc 000155fe [ 60.141014] f760241c f5a2f838 f5a2f8c8 00000000 e480bea4 c1037c24 00000000 f5a2f838 [ 60.141014] Call Trace: [ 60.141014] [<c1536dd0>] ? mutex_unlock+0x8/0xa [ 60.141014] [<c125ab1b>] ? drm_gem_vm_close+0x39/0x3d [ 60.141014] [<c10ba071>] ? remove_vma+0x2d/0x58 [ 60.141014] [<c10bb0bc>] ? exit_mmap+0x126/0x13f [ 60.141014] [<c1037c24>] ? mmput+0x37/0x9a [ 60.141014] [<c10d450d>] ? exec_mmap+0x178/0x19c [ 60.141014] [<c1537f85>] ? _raw_spin_unlock+0x1d/0x36 [ 60.141014] [<c10d4eb0>] ? flush_old_exec+0x42/0x75 [ 60.141014] [<c1104442>] ? load_elf_binary+0x32a/0x922 [ 60.141014] [<c10d3f76>] ? search_binary_handler+0x200/0x2ea [ 60.141014] [<c10d3ecf>] ? search_binary_handler+0x159/0x2ea [ 60.141014] [<c1104118>] ? load_elf_binary+0x0/0x922 [ 60.141014] [<c10d56b2>] ? do_execve+0x1ff/0x2e6 [ 60.141014] [<c100970e>] ? sys_execve+0x2d/0x55 [ 60.141014] [<c1002a5a>] ? ptregs_execve+0x12/0x18 [ 60.141014] [<c10029dc>] ? sysenter_do_call+0x12/0x3c [ 60.141014] [<c1530000>] ? init_centaur+0x9c/0x1ba [ 60.141014] Code: c1 00 75 0f ba 38 01 00 00 b8 8c 3a 6c c1 e8 cc 2e b0 ff 9c 58 8d 74 26 00 89 c7 fa 90 8d 74 26 00 e8 d2 b4 b2 ff b8 00 01 00 00 <f0> 66 0f c1 43 04 38 e0 74 07 f3 90 8a 43 04 eb f5 83 3d 64 ef [ 60.141014] EIP: [<c1536d11>] __mutex_unlock_slowpath+0x5a/0x111 SS:ESP 0068:e480be44 [ 60.141014] CR2: 000000006b6b6b9f Reported-by: Rusty Lynch <rusty.lynch@intel.com> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: stable@kernel.org Signed-off-by: Dave Airlie <airlied@redhat.com> |
||
|---|---|---|
| .. | ||
| i2c | ||
| i810 | ||
| i915 | ||
| mga | ||
| nouveau | ||
| r128 | ||
| radeon | ||
| savage | ||
| sis | ||
| tdfx | ||
| ttm | ||
| via | ||
| vmwgfx | ||
| ati_pcigart.c | ||
| drm_agpsupport.c | ||
| drm_auth.c | ||
| drm_buffer.c | ||
| drm_bufs.c | ||
| drm_cache.c | ||
| drm_context.c | ||
| drm_crtc_helper.c | ||
| drm_crtc.c | ||
| drm_debugfs.c | ||
| drm_dma.c | ||
| drm_dp_i2c_helper.c | ||
| drm_drv.c | ||
| drm_edid_modes.h | ||
| drm_edid.c | ||
| drm_encoder_slave.c | ||
| drm_fb_helper.c | ||
| drm_fops.c | ||
| drm_gem.c | ||
| drm_global.c | ||
| drm_hashtab.c | ||
| drm_info.c | ||
| drm_ioc32.c | ||
| drm_ioctl.c | ||
| drm_irq.c | ||
| drm_lock.c | ||
| drm_memory.c | ||
| drm_mm.c | ||
| drm_modes.c | ||
| drm_pci.c | ||
| drm_platform.c | ||
| drm_proc.c | ||
| drm_scatter.c | ||
| drm_sman.c | ||
| drm_stub.c | ||
| drm_sysfs.c | ||
| drm_trace_points.c | ||
| drm_trace.h | ||
| drm_usb.c | ||
| drm_vm.c | ||
| Kconfig | ||
| Makefile | ||
| README.drm | ||
************************************************************
* For the very latest on DRI development, please see: *
* http://dri.freedesktop.org/ *
************************************************************
The Direct Rendering Manager (drm) is a device-independent kernel-level
device driver that provides support for the XFree86 Direct Rendering
Infrastructure (DRI).
The DRM supports the Direct Rendering Infrastructure (DRI) in four major
ways:
1. The DRM provides synchronized access to the graphics hardware via
the use of an optimized two-tiered lock.
2. The DRM enforces the DRI security policy for access to the graphics
hardware by only allowing authenticated X11 clients access to
restricted regions of memory.
3. The DRM provides a generic DMA engine, complete with multiple
queues and the ability to detect the need for an OpenGL context
switch.
4. The DRM is extensible via the use of small device-specific modules
that rely extensively on the API exported by the DRM module.
Documentation on the DRI is available from:
http://dri.freedesktop.org/wiki/Documentation
http://sourceforge.net/project/showfiles.php?group_id=387
http://dri.sourceforge.net/doc/
For specific information about kernel-level support, see:
The Direct Rendering Manager, Kernel Support for the Direct Rendering
Infrastructure
http://dri.sourceforge.net/doc/drm_low_level.html
Hardware Locking for the Direct Rendering Infrastructure
http://dri.sourceforge.net/doc/hardware_locking_low_level.html
A Security Analysis of the Direct Rendering Infrastructure
http://dri.sourceforge.net/doc/security_low_level.html