drm/shmem-helper: Remove another errant put in error path

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commit ee9adb7a45 upstream.

drm_gem_shmem_mmap() doesn't own reference in error code path, resulting
in the dma-buf shmem GEM object getting prematurely freed leading to a
later use-after-free.

Fixes: f49a51bfdc ("drm/shme-helpers: Fix dma_buf_mmap forwarding bug")
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Reviewed-by: Rob Clark <robdclark@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230108211311.3950107-1-dmitry.osipenko@collabora.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Dmitry Osipenko 2023-01-09 00:13:11 +03:00 • committed by Greg Kroah-Hartman

parent 598c42c789

commit 77d26c824a

1 changed files with 6 additions and 3 deletions

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drivers/gpu/drm/drm_gem_shmem_helper.c

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