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WSL2-Linux-Kernel/drivers/gpu/drm/i915/gem
История
Chris Wilson 713fa3e459 drm/i915/gem: Really move i915_gem_context.link under ref protection 
commit d119888b09 upstream.

i915_perf assumes that it can use the i915_gem_context reference to
protect its i915->gem.contexts.list iteration. However, this requires
that we do not remove the context from the list until after we drop the
final reference and release the struct. If, as currently, we remove the
context from the list during context_close(), the link.next pointer may
be poisoned while we are holding the context reference and cause a GPF:

[ 4070.573157] i915 0000:00:02.0: [drm:i915_perf_open_ioctl [i915]] filtering on ctx_id=0x1fffff ctx_id_mask=0x1fffff
[ 4070.574881] general protection fault, probably for non-canonical address 0xdead000000000100: 0000 [#1] PREEMPT SMP
[ 4070.574897] CPU: 1 PID: 284392 Comm: amd_performance Tainted: G            E     5.17.9 #180
[ 4070.574903] Hardware name: Intel Corporation NUC7i5BNK/NUC7i5BNB, BIOS BNKBL357.86A.0052.2017.0918.1346 09/18/2017
[ 4070.574907] RIP: 0010:oa_configure_all_contexts.isra.0+0x222/0x350 [i915]
[ 4070.574982] Code: 08 e8 32 6e 10 e1 4d 8b 6d 50 b8 ff ff ff ff 49 83 ed 50 f0 41 0f c1 04 24 83 f8 01 0f 84 e3 00 00 00 85 c0 0f 8e fa 00 00 00 <49> 8b 45 50 48 8d 70 b0 49 8d 45 50 48 39 44 24 10 0f 85 34 fe ff
[ 4070.574990] RSP: 0018:ffffc90002077b78 EFLAGS: 00010202
[ 4070.574995] RAX: 0000000000000002 RBX: 0000000000000002 RCX: 0000000000000000
[ 4070.575000] RDX: 0000000000000001 RSI: ffffc90002077b20 RDI: ffff88810ddc7c68
[ 4070.575004] RBP: 0000000000000001 R08: ffff888103242648 R09: fffffffffffffffc
[ 4070.575008] R10: ffffffff82c50bc0 R11: 0000000000025c80 R12: ffff888101bf1860
[ 4070.575012] R13: dead0000000000b0 R14: ffffc90002077c04 R15: ffff88810be5cabc
[ 4070.575016] FS:  00007f1ed50c0780(0000) GS:ffff88885ec80000(0000) knlGS:0000000000000000
[ 4070.575021] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 4070.575025] CR2: 00007f1ed5590280 CR3: 000000010ef6f005 CR4: 00000000003706e0
[ 4070.575029] Call Trace:
[ 4070.575033]  <TASK>
[ 4070.575037]  lrc_configure_all_contexts+0x13e/0x150 [i915]
[ 4070.575103]  gen8_enable_metric_set+0x4d/0x90 [i915]
[ 4070.575164]  i915_perf_open_ioctl+0xbc0/0x1500 [i915]
[ 4070.575224]  ? asm_common_interrupt+0x1e/0x40
[ 4070.575232]  ? i915_oa_init_reg_state+0x110/0x110 [i915]
[ 4070.575290]  drm_ioctl_kernel+0x85/0x110
[ 4070.575296]  ? update_load_avg+0x5f/0x5e0
[ 4070.575302]  drm_ioctl+0x1d3/0x370
[ 4070.575307]  ? i915_oa_init_reg_state+0x110/0x110 [i915]
[ 4070.575382]  ? gen8_gt_irq_handler+0x46/0x130 [i915]
[ 4070.575445]  __x64_sys_ioctl+0x3c4/0x8d0
[ 4070.575451]  ? __do_softirq+0xaa/0x1d2
[ 4070.575456]  do_syscall_64+0x35/0x80
[ 4070.575461]  entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 4070.575467] RIP: 0033:0x7f1ed5c10397
[ 4070.575471] Code: 3c 1c e8 1c ff ff ff 85 c0 79 87 49 c7 c4 ff ff ff ff 5b 5d 4c 89 e0 41 5c c3 66 0f 1f 84 00 00 00 00 00 b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a9 da 0d 00 f7 d8 64 89 01 48
[ 4070.575478] RSP: 002b:00007ffd65c8d7a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[ 4070.575484] RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 00007f1ed5c10397
[ 4070.575488] RDX: 00007ffd65c8d7c0 RSI: 0000000040106476 RDI: 0000000000000006
[ 4070.575492] RBP: 00005620972f9c60 R08: 000000000000000a R09: 0000000000000005
[ 4070.575496] R10: 000000000000000d R11: 0000000000000246 R12: 000000000000000a
[ 4070.575500] R13: 000000000000000d R14: 0000000000000000 R15: 00007ffd65c8d7c0
[ 4070.575505]  </TASK>
[ 4070.575507] Modules linked in: nls_ascii(E) nls_cp437(E) vfat(E) fat(E) i915(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) crct10dif_pclmul(E) crc32_pclmul(E) crc32c_intel(E) aesni_intel(E) crypto_simd(E) intel_gtt(E) cryptd(E) ttm(E) rapl(E) intel_cstate(E) drm_kms_helper(E) cfbfillrect(E) syscopyarea(E) cfbimgblt(E) intel_uncore(E) sysfillrect(E) mei_me(E) sysimgblt(E) i2c_i801(E) fb_sys_fops(E) mei(E) intel_pch_thermal(E) i2c_smbus(E) cfbcopyarea(E) video(E) button(E) efivarfs(E) autofs4(E)
[ 4070.575549] ---[ end trace 0000000000000000 ]---

v3: fix incorrect syntax of spin_lock() replacing spin_lock_irqsave()

v2: irqsave not required in a worker, neither conversion to irq safe
    elsewhere (Tvrtko),
  - perf: it's safe to call gen8_configure_context() even if context has
    been closed, no need to check,
  - drop unrelated cleanup (Andi, Tvrtko)

Reported-by: Mark Janes <mark.janes@intel.com>
Closes: https://gitlab.freedesktop.org/drm/intel/issues/6222
References: a4e7ccdac3 ("drm/i915: Move context management under GEM")
Fixes: f8246cf4d9 ("drm/i915/gem: Drop free_work for GEM contexts")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Signed-off-by: Janusz Krzysztofik <janusz.krzysztofik@linux.intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: <stable@vger.kernel.org> # v5.12+
Signed-off-by: Andi Shyti <andi.shyti@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220916092403.201355-3-janusz.krzysztofik@linux.intel.com
(cherry picked from commit ad3aa7c31e)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
[janusz: backport]
Signed-off-by: Janusz Krzysztofik <janusz.krzysztofik@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 		2022-10-05 10:39:44 +02:00
..
selftests drm/i915/selftests: Always initialize err in igt_dmabuf_import_same_driver_lmem() 2021-09-14 19:48:30 +03:00
i915_gem_busy.c
…
i915_gem_clflush.c drm/i915: Drop error handling from dma_fence_work 2021-07-16 21:47:39 +02:00
i915_gem_clflush.h
…
i915_gem_context.c drm/i915/gem: Really move i915_gem_context.link under ref protection 2022-10-05 10:39:44 +02:00
i915_gem_context.h drm/i915: move gem_context slab to direct module init/exit 2021-07-28 16:45:58 +02:00
i915_gem_context_types.h drm/i915/gem: Delay context creation (v3) 2021-07-08 19:48:52 +02:00
i915_gem_create.c drm/i915/gem: Unify user object creation (v3) 2021-07-26 16:37:33 +01:00
i915_gem_dmabuf.c drm/i915/gem: Migrate to system at dma-buf attach time (v7) 2021-07-26 16:37:38 +01:00
i915_gem_domain.c drm/i915/uapi: reject set_domain for discrete 2021-07-23 11:55:32 +01:00
i915_gem_execbuffer.c drm/i915: Require the vm mutex for i915_vma_bind() 2022-07-21 21:24:25 +02:00
i915_gem_internal.c Merge branch 'stable/for-linus-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb 2021-09-03 10:34:44 -07:00
i915_gem_ioctls.h
…
i915_gem_lmem.c drm/i915: support forcing the page size with lmem 2021-06-30 13:24:29 +01:00
i915_gem_lmem.h drm/i915: support forcing the page size with lmem 2021-06-30 13:24:29 +01:00
i915_gem_mman.c drm/i915: Sunset igpu legacy mmap support based on GRAPHICS_VER_FULL 2022-04-20 09:34:21 +02:00
i915_gem_mman.h
…
i915_gem_object.c drm/i915: Fix a race between vma / object destruction and unbinding 2022-07-12 16:35:07 +02:00
i915_gem_object.h drm/i915: move gem_objects slab to direct module init/exit 2021-07-28 16:45:58 +02:00
i915_gem_object_types.h drm/i915: Flush TLBs before releasing backing store 2022-01-29 10:58:24 +01:00
i915_gem_pages.c drm/i915: don't call free_mmap_offset when purging 2022-03-08 19:12:36 +01:00
i915_gem_phys.c
…
i915_gem_pm.c
…
i915_gem_pm.h
…
i915_gem_region.c drm/i915: support forcing the page size with lmem 2021-06-30 13:24:29 +01:00
i915_gem_region.h drm/i915: support forcing the page size with lmem 2021-06-30 13:24:29 +01:00
i915_gem_shmem.c drm/i915/ehl: unconditionally flush the pages on acquire 2021-07-27 09:16:46 +01:00
i915_gem_shrinker.c drm/i915: Fix runtime pm handling in i915_gem_shrink 2021-10-05 11:52:47 +03:00
i915_gem_shrinker.h
…
i915_gem_stolen.c Merge tag 'drm-intel-next-2021-08-10-1' of git://anongit.freedesktop.org/drm/drm-intel into drm-next 2021-08-12 11:20:17 +10:00
i915_gem_stolen.h
…
i915_gem_throttle.c
…
i915_gem_tiling.c
…
i915_gem_ttm.c drm/i915/ttm: tweak priority hint selection 2022-02-23 12:03:09 +01:00
i915_gem_ttm.h drm/i915: support forcing the page size with lmem 2021-06-30 13:24:29 +01:00
i915_gem_userptr.c RDMA v5.15 merge window Pull Request 2021-09-02 14:47:21 -07:00
i915_gem_wait.c drm/i915/gem: Implement object migration 2021-06-30 11:32:11 +01:00
i915_gemfs.c
…
i915_gemfs.h
…