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authorAnirudh Rayabharam <mail@anirudhrb.com>2021-05-16 21:27:14 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2021-05-21 15:04:05 +0200
commit02625c965239b71869326dd0461615f27307ecb3 (patch)
treef977e43ab1a1e895b291a78284ddf65d24347a1c /drivers/w1
parentMerge tag 'soundwire-5.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel... (diff)
downloadlinux-02625c965239b71869326dd0461615f27307ecb3.tar.xz
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video: hgafb: correctly handle card detect failure during probe
The return value of hga_card_detect() is not properly handled causing the probe to succeed even though hga_card_detect() failed. Since probe succeeds, hgafb_open() can be called which will end up operating on an unmapped hga_vram. This results in an out-of-bounds access as reported by kernel test robot [1]. To fix this, correctly detect failure of hga_card_detect() by checking for a non-zero error code. [1]: https://lore.kernel.org/lkml/20210516150019.GB25903@xsang-OptiPlex-9020/ Fixes: dc13cac4862c ("video: hgafb: fix potential NULL pointer dereference") Cc: stable <stable@vger.kernel.org> Reported-by: kernel test robot <oliver.sang@intel.com> Reviewed-by: Igor Matheus Andrade Torrente <igormtorrente@gmail.com> Signed-off-by: Anirudh Rayabharam <mail@anirudhrb.com> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Link: https://lore.kernel.org/r/20210516192714.25823-1-mail@anirudhrb.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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