[Intel-gfx] oops on ILK with piglit

[Dave Airlie]

I just ran drm-next on my ILK box and ran piglit inside gnome-shell
and got this oops

ernel: BUG: unable to handle kernel NULL pointer dereference at 0000000000000030
ernel: IP: [<ffffffffa00a3828>] i915_gem_free_request+0x58/0xa0 [i915]
ernel: PGD 19152067 PUD 50ef4067 PMD 0
ernel: Oops: 0000 [#1] SMP
ernel: Modules linked in: nls_utf8 udf ccm arc4 iwldvm mac80211 fuse
xt_CHECKSUM iptable_mangle tun bridge stp llc ebtable_nat ebtables
bnep
ernel:  drm i2c_core video
ernel: CPU: 1 PID: 648 Comm: shader_runner Not tainted 3.14.0+ #5
ernel: Hardware name: Hewlett-Packard HP EliteBook 2540p/7008, BIOS
68CSU Ver. F.08 11/24/2010
ernel: task: ffff880105ad6100 ti: ffff880104aa8000 task.ti: ffff880104aa8000
ernel: RIP: 0010:[<ffffffffa00a3828>]  [<ffffffffa00a3828>]
i915_gem_free_request+0x58/0xa0 [i915]
ernel: RSP: 0018:ffff880104aa9cf8  EFLAGS: 00010286
ernel: RAX: 0000000000000000 RBX: ffff88000388fd20 RCX: dead000000200200
ernel: RDX: ffff880108613090 RSI: ffff88012f523898 RDI: ffff88000388f840
ernel: RBP: ffff880104aa9d08 R08: ffff88000388fd50 R09: 000000018015000b
ernel: R10: ffffffffa00a8f34 R11: ffffea0002112f80 R12: 0000000000000000
ernel: R13: ffff88000388fd50 R14: 000000000004c488 R15: ffff880037bb1868
ernel: FS:  00007f389ae70880(0000) GS:ffff880137c40000(0000)
knlGS:0000000000000000
ernel: CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
ernel: CR2: 0000000000000030 CR3: 000000001910c000 CR4: 00000000000007e0
ernel: Stack:
ernel:  ffff880131f39828 000000000004c487 ffff880104aa9d50 ffffffffa00a3a7e
ernel:  ffff880131f39928 ffff88000388fd20 ffff880084841800 0000000000000000
ernel:  ffff880131f39828 0000000000000000 ffff880037bb1868 ffff880104aa9d90
ernel: Call Trace:
ernel:  [<ffffffffa00a3a7e>] i915_gem_retire_requests_ring+0xae/0x130 [i915]
ernel:  [<ffffffffa00a4d5c>]
i915_gem_object_wait_rendering__nonblocking+0xdc/0x110 [i915]
ernel:  [<ffffffffa00a9e91>] i915_gem_set_domain_ioctl+0x91/0x140 [i915]
ernel:  [<ffffffff81179c01>] ? __vma_link_rb+0x71/0xe0
ernel:  [<ffffffffa001f8c0>] drm_ioctl+0x1e0/0x5e0 [drm]
ernel:  [<ffffffff8117bf99>] ? mmap_region+0x199/0x5a0
ernel:  [<ffffffffa00a9e00>] ?
i915_gem_object_set_to_gtt_domain+0x200/0x200 [i915]
ernel:  [<ffffffff811be338>] do_vfs_ioctl+0x2d8/0x4b0
ernel:  [<ffffffff811be591>] SyS_ioctl+0x81/0xa0
ernel:  [<ffffffff8166470b>] tracesys+0xdd/0xe2

Dave.