Zhou Qingyang 49a8bf50ca drm/i915/gem: Fix a NULL pointer dereference in igt_request_rewind() ... In igt_request_rewind(), mock_context(i915, "A") is assigned to ctx[0] and used in i915_gem_context_get_engine(). There is a dereference of ctx[0] in i915_gem_context_get_engine(), which could lead to a NULL pointer dereference on failure of mock_context(i915, "A") . So as mock_context(i915, "B"). Although this bug is not serious for it belongs to testing code, it is better to be fixed to avoid unexpected failure in testing. Fix this bugs by adding checks about ctx[0] and ctx[1]. This bug was found by a static analyzer. The analysis employs differential checking to identify inconsistent security operations (e.g., checks or kfrees) between two code paths and confirms that the inconsistent operations are not recovered in the current function or the callers, so they constitute bugs. Note that, as a bug found by static analysis, it can be a false positive or hard to trigger. Multiple researchers have cross-reviewed the bug. Builds with CONFIG_DRM_I915_SELFTEST=y show no new warnings, and our static analyzer no longer warns about this code. References: 591c0fb85d ("drm/i915: Exercise request cancellation using a mock selftest") [tursulin: Replaced fixes with references to avoid.] Signed-off-by: Zhou Qingyang <zhou1615@umn.edu> Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20211130141545.153899-1-zhou1615@umn.edu		2021-12-01 09:22:15 +00:00
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drm	drm/i915/gem: Fix a NULL pointer dereference in igt_request_rewind()	2021-12-01 09:22:15 +00:00
host1x	gpu: host1x: Plug potential memory leak	2021-09-16 18:06:52 +02:00
ipu-v3	media: i.MX6: Support 16-bit BT.1120 video input	2021-10-19 08:08:38 +01:00
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vga	vgaarb: don't pass a cookie to vga_client_register	2021-07-21 10:29:10 +02:00
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