From: Jason Ekstrand <jason@jlekstrand.net>
To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>,
Jason Ekstrand <jason@jlekstrand.net>
Subject: [PATCH 12/29] drm/i915/gem: Disallow creating contexts with too many engines
Date: Thu, 27 May 2021 11:26:33 -0500 [thread overview]
Message-ID: <20210527162650.1182544-13-jason@jlekstrand.net> (raw)
In-Reply-To: <20210527162650.1182544-1-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>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
drivers/gpu/drm/i915/gem/i915_gem_context.c | 8 ++++----
1 file changed, 4 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 5e159fb526631..2b9207b557cc9 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_context.c
@@ -1639,11 +1639,11 @@ 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);
+ /* RING_MASK has no shift so we can use it directly here */
+ if (num_engines > I915_EXEC_RING_MASK + 1)
+ return -EINVAL;
+
set.engines = alloc_engines(num_engines);
if (!set.engines)
return -ENOMEM;
--
2.31.1
next prev parent reply other threads:[~2021-05-27 16:27 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-27 16:26 [PATCH 00/29] drm/i915/gem: ioctl clean-ups (v6) Jason Ekstrand
2021-05-27 16:26 ` [PATCH 01/29] drm/i915: Drop I915_CONTEXT_PARAM_RINGSIZE Jason Ekstrand
2021-05-27 16:26 ` [PATCH 02/29] drm/i915: Stop storing the ring size in the ring pointer (v2) Jason Ekstrand
2021-05-27 16:26 ` [PATCH 03/29] drm/i915: Drop I915_CONTEXT_PARAM_NO_ZEROMAP Jason Ekstrand
2021-05-27 16:26 ` [PATCH 04/29] drm/i915/gem: Set the watchdog timeout directly in intel_context_set_gem (v2) Jason Ekstrand
2021-05-27 16:26 ` [PATCH 05/29] drm/i915/gem: Return void from context_apply_all Jason Ekstrand
2021-05-27 16:26 ` [PATCH 06/29] drm/i915: Drop the CONTEXT_CLONE API (v2) Jason Ekstrand
2021-05-27 16:26 ` [PATCH 07/29] drm/i915: Implement SINGLE_TIMELINE with a syncobj (v4) Jason Ekstrand
2021-05-27 16:26 ` [PATCH 08/29] drm/i915: Drop getparam support for I915_CONTEXT_PARAM_ENGINES Jason Ekstrand
2021-05-27 16:26 ` [PATCH 09/29] drm/i915/gem: Disallow bonding of virtual engines (v3) Jason Ekstrand
2021-05-27 16:26 ` [PATCH 10/29] drm/i915/gem: Remove engine auto-magic with FENCE_SUBMIT (v2) Jason Ekstrand
2021-05-27 16:26 ` [PATCH 11/29] drm/i915/request: Remove the hook from await_execution Jason Ekstrand
2021-05-27 16:26 ` Jason Ekstrand [this message]
2021-05-27 16:26 ` [PATCH 13/29] drm/i915: Stop manually RCU banging in reset_stats_ioctl (v2) Jason Ekstrand
2021-05-27 16:26 ` [PATCH 14/29] drm/i915/gem: Add a separate validate_priority helper Jason Ekstrand
2021-05-27 16:26 ` [PATCH 15/29] drm/i915: Add gem/i915_gem_context.h to the docs Jason Ekstrand
2021-05-27 16:26 ` [PATCH 16/29] drm/i915/gem: Add an intermediate proto_context struct Jason Ekstrand
2021-05-31 8:47 ` [Intel-gfx] " Daniel Vetter
2021-06-02 21:24 ` Jason Ekstrand
2021-06-03 7:09 ` Daniel Vetter
2021-05-27 16:26 ` [PATCH 17/29] drm/i915/gem: Rework error handling in default_engines Jason Ekstrand
2021-05-27 16:26 ` [PATCH 18/29] drm/i915/gem: Optionally set SSEU in intel_context_set_gem Jason Ekstrand
2021-05-31 8:48 ` Daniel Vetter
2021-06-02 22:05 ` Jason Ekstrand
2021-05-27 16:26 ` [PATCH 19/29] drm/i915: Add an i915_gem_vm_lookup helper Jason Ekstrand
2021-05-27 18:30 ` Daniel Vetter
2021-05-27 16:26 ` [PATCH 20/29] drm/i915/gem: Make an alignment check more sensible Jason Ekstrand
2021-05-27 18:31 ` Daniel Vetter
2021-05-27 16:26 ` [PATCH 21/29] drm/i915/gem: Use the proto-context to handle create parameters (v2) Jason Ekstrand
2021-05-31 9:11 ` Daniel Vetter
2021-06-02 22:23 ` Jason Ekstrand
2021-06-03 7:32 ` Daniel Vetter
2021-06-03 16:29 ` Jason Ekstrand
2021-05-27 16:26 ` [PATCH 22/29] drm/i915/gem: Return an error ptr from context_lookup Jason Ekstrand
2021-05-27 16:26 ` [PATCH 23/29] drm/i915/gt: Drop i915_address_space::file (v2) Jason Ekstrand
2021-05-27 16:26 ` [PATCH 24/29] drm/i915/gem: Delay context creation Jason Ekstrand
2021-05-31 9:50 ` Daniel Vetter
2021-06-02 22:55 ` Jason Ekstrand
2021-06-03 7:26 ` Daniel Vetter
2021-05-27 16:26 ` [PATCH 25/29] drm/i915/gem: Don't allow changing the VM on running contexts (v2) Jason Ekstrand
2021-05-31 14:08 ` Daniel Vetter
2021-05-27 16:26 ` [PATCH 26/29] drm/i915/gem: Don't allow changing the engine set " Jason Ekstrand
2021-05-31 13:58 ` [Intel-gfx] " Daniel Vetter
2021-05-27 16:26 ` [PATCH 27/29] drm/i915/selftests: Take a VM in kernel_context() Jason Ekstrand
2021-05-27 16:26 ` [PATCH 28/29] i915/gem/selftests: Assign the VM at context creation in igt_shared_ctx_exec Jason Ekstrand
2021-05-27 16:26 ` [PATCH 29/29] drm/i915/gem: Roll all of context creation together Jason Ekstrand
2021-05-31 14:18 ` [Intel-gfx] " Daniel Vetter
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210527162650.1182544-13-jason@jlekstrand.net \
--to=jason@jlekstrand.net \
--cc=daniel.vetter@ffwll.ch \
--cc=dri-devel@lists.freedesktop.org \
--cc=intel-gfx@lists.freedesktop.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).