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From: Jason Ekstrand <jason@jlekstrand.net>
To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org
Cc: Jason Ekstrand <jason@jlekstrand.net>
Subject: [PATCH 09/21] drm/i915/gem: Disallow creating contexts with too many engines
Date: Fri, 23 Apr 2021 17:31:19 -0500	[thread overview]
Message-ID: <20210423223131.879208-10-jason@jlekstrand.net> (raw)
In-Reply-To: <20210423223131.879208-1-jason@jlekstrand.net>

There's no sense in allowing userspace to create more engines than it
can possibly access via execbuf.

Signed-off-by: Jason Ekstrand <jason@jlekstrand.net>
---
 drivers/gpu/drm/i915/gem/i915_gem_context.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_context.c b/drivers/gpu/drm/i915/gem/i915_gem_context.c
index 5f8d0faf783aa..ecb3bf5369857 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_context.c
@@ -1640,11 +1640,10 @@ set_engines(struct i915_gem_context *ctx,
 		return -EINVAL;
 	}
 
-	/*
-	 * Note that I915_EXEC_RING_MASK limits execbuf to only using the
-	 * first 64 engines defined here.
-	 */
 	num_engines = (args->size - sizeof(*user)) / sizeof(*user->engines);
+	if (num_engines > I915_EXEC_RING_MASK + 1)
+		return -EINVAL;
+
 	set.engines = alloc_engines(num_engines);
 	if (!set.engines)
 		return -ENOMEM;
-- 
2.31.1

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  parent reply	other threads:[~2021-04-23 22:32 UTC|newest]

Thread overview: 110+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-23 22:31 [PATCH 00/21] drm/i915/gem: ioctl clean-ups Jason Ekstrand
2021-04-23 22:31 ` [PATCH 01/21] drm/i915: Drop I915_CONTEXT_PARAM_RINGSIZE Jason Ekstrand
2021-04-27  9:32   ` Daniel Vetter
2021-04-28  3:33     ` Jason Ekstrand
2021-04-23 22:31 ` [PATCH 02/21] drm/i915: Drop I915_CONTEXT_PARAM_NO_ZEROMAP Jason Ekstrand
2021-04-27  9:38   ` [Intel-gfx] " Daniel Vetter
2021-04-23 22:31 ` [PATCH 03/21] drm/i915/gem: Set the watchdog timeout directly in intel_context_set_gem Jason Ekstrand
2021-04-27  9:42   ` Daniel Vetter
2021-04-28 15:55   ` [Intel-gfx] " Tvrtko Ursulin
2021-04-28 17:24     ` Jason Ekstrand
2021-04-29  8:04       ` Tvrtko Ursulin
2021-04-29 14:54         ` Jason Ekstrand
2021-04-29 17:12           ` Daniel Vetter
2021-04-29 17:13             ` Daniel Vetter
2021-04-29 18:41               ` Jason Ekstrand
2021-04-30 11:18           ` Tvrtko Ursulin
2021-04-30 15:35             ` Jason Ekstrand
2021-04-23 22:31 ` [PATCH 04/21] drm/i915/gem: Return void from context_apply_all Jason Ekstrand
2021-04-27  9:42   ` Daniel Vetter
2021-04-23 22:31 ` [PATCH 05/21] drm/i915: Drop the CONTEXT_CLONE API Jason Ekstrand
2021-04-27  9:49   ` [Intel-gfx] " Daniel Vetter
2021-04-28 17:38     ` Jason Ekstrand
2021-04-28 15:59   ` Tvrtko Ursulin
2021-04-23 22:31 ` [PATCH 06/21] drm/i915: Implement SINGLE_TIMELINE with a syncobj (v3) Jason Ekstrand
2021-04-27  9:55   ` [Intel-gfx] " Daniel Vetter
2021-04-28 15:49   ` Tvrtko Ursulin
2021-04-28 17:26     ` Jason Ekstrand
2021-04-29  8:06       ` Tvrtko Ursulin
2021-04-29 12:08         ` Daniel Vetter
2021-04-29 14:47           ` Jason Ekstrand
2021-04-23 22:31 ` [PATCH 07/21] drm/i915: Drop getparam support for I915_CONTEXT_PARAM_ENGINES Jason Ekstrand
2021-04-27  9:58   ` Daniel Vetter
2021-04-23 22:31 ` [PATCH 08/21] drm/i915/gem: Disallow bonding of virtual engines Jason Ekstrand
2021-04-26 23:43   ` [PATCH 08/20] drm/i915/gem: Disallow bonding of virtual engines (v2) Jason Ekstrand
2021-04-27 13:58     ` [Intel-gfx] " Daniel Vetter
2021-04-27 13:51   ` [PATCH 08/21] drm/i915/gem: Disallow bonding of virtual engines Jason Ekstrand
2021-04-28 10:13     ` Daniel Vetter
2021-04-28 17:18       ` Jason Ekstrand
2021-04-28 17:18         ` [Intel-gfx] " Matthew Brost
2021-04-28 17:46           ` Jason Ekstrand
2021-04-28 17:55             ` Matthew Brost
2021-04-28 18:17               ` Jason Ekstrand
2021-04-29 12:14                 ` Daniel Vetter
2021-04-30  4:03                   ` Matthew Brost
2021-04-30 10:11                     ` Daniel Vetter
2021-05-01 17:17                       ` Matthew Brost
2021-05-04  7:36                         ` Daniel Vetter
2021-04-28 18:58         ` Jason Ekstrand
2021-04-29 12:16           ` Daniel Vetter
2021-04-29 16:02             ` Jason Ekstrand
2021-04-29 17:14               ` Daniel Vetter
2021-04-28 15:51   ` [Intel-gfx] " Tvrtko Ursulin
2021-04-29 12:24     ` Daniel Vetter
2021-04-29 12:54       ` Tvrtko Ursulin
2021-04-29 15:41         ` Jason Ekstrand
2021-04-23 22:31 ` Jason Ekstrand [this message]
2021-04-28 10:16   ` [Intel-gfx] [PATCH 09/21] drm/i915/gem: Disallow creating contexts with too many engines Daniel Vetter
2021-04-28 10:42     ` Tvrtko Ursulin
2021-04-28 14:02       ` Daniel Vetter
2021-04-28 14:26         ` Tvrtko Ursulin
2021-04-28 17:09           ` Jason Ekstrand
2021-04-29  8:01             ` Tvrtko Ursulin
2021-04-29 19:16               ` Jason Ekstrand
2021-04-30 11:40                 ` Tvrtko Ursulin
2021-04-30 15:54                   ` Jason Ekstrand
2021-04-23 22:31 ` [PATCH 10/21] drm/i915/request: Remove the hook from await_execution Jason Ekstrand
2021-04-26 23:44   ` Jason Ekstrand
2021-04-23 22:31 ` [PATCH 11/21] drm/i915: Stop manually RCU banging in reset_stats_ioctl Jason Ekstrand
2021-04-28 10:27   ` Daniel Vetter
2021-04-28 18:22     ` Jason Ekstrand
2021-04-29 12:22       ` Daniel Vetter
2021-04-23 22:31 ` [PATCH 12/21] drm/i915/gem: Add a separate validate_priority helper Jason Ekstrand
2021-04-28 14:37   ` Daniel Vetter
2021-04-23 22:31 ` [PATCH 13/21] drm/i915/gem: Add an intermediate proto_context struct Jason Ekstrand
2021-04-29 13:02   ` [Intel-gfx] " Daniel Vetter
2021-04-29 16:44     ` Jason Ekstrand
2021-04-23 22:31 ` [PATCH 14/21] drm/i915/gem: Return an error ptr from context_lookup Jason Ekstrand
2021-04-29 13:27   ` [Intel-gfx] " Daniel Vetter
2021-04-29 15:29     ` Jason Ekstrand
2021-04-29 17:16       ` Daniel Vetter
2021-04-23 22:31 ` [PATCH 15/21] drm/i915/gt: Drop i915_address_space::file Jason Ekstrand
2021-04-29 12:37   ` Daniel Vetter
2021-04-29 15:26     ` Jason Ekstrand
2021-04-23 22:31 ` [PATCH 16/21] drm/i915/gem: Delay context creation Jason Ekstrand
2021-04-24  3:21   ` [Intel-gfx] " kernel test robot
2021-04-24  3:24   ` kernel test robot
2021-04-29 15:51   ` Daniel Vetter
2021-04-29 18:16     ` Jason Ekstrand
2021-04-29 18:56       ` Daniel Vetter
2021-04-29 19:01         ` Jason Ekstrand
2021-04-29 19:07           ` Daniel Vetter
2021-04-29 21:35             ` Jason Ekstrand
2021-04-30  6:53               ` Daniel Vetter
2021-04-30 11:58                 ` Tvrtko Ursulin
2021-04-30 12:30                   ` Daniel Vetter
2021-04-30 12:44                     ` Tvrtko Ursulin
2021-04-30 13:07                       ` Daniel Vetter
2021-04-30 13:15                         ` Tvrtko Ursulin
2021-04-30 16:27                 ` Jason Ekstrand
2021-04-30 16:33                   ` Daniel Vetter
2021-04-30 16:57                     ` Jason Ekstrand
2021-04-30 17:08                       ` Daniel Vetter
2021-04-23 22:31 ` [PATCH 17/21] drm/i915/gem: Don't allow changing the VM on running contexts Jason Ekstrand
2021-04-23 22:31 ` [PATCH 18/21] drm/i915/gem: Don't allow changing the engine set " Jason Ekstrand
2021-04-29 17:21   ` Daniel Vetter
2021-04-23 22:31 ` [PATCH 19/21] drm/i915/selftests: Take a VM in kernel_context() Jason Ekstrand
2021-04-23 22:31 ` [PATCH 20/21] i915/gem/selftests: Assign the VM at context creation in igt_shared_ctx_exec Jason Ekstrand
2021-04-29 17:19   ` [Intel-gfx] " Daniel Vetter
2021-04-23 22:31 ` [PATCH 21/21] drm/i915/gem: Roll all of context creation together Jason Ekstrand
2021-04-29 17:25   ` Daniel Vetter

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