From: Vitaly Chikunov <vt@altlinux.org>
To: Sasha Levin <sashal@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Subject: Re: [PATCH AUTOSEL 5.15 22/41] video: fbdev: pxa3xx-gcu: Fix integer overflow in pxa3xx_gcu_write
Date: Mon, 19 Sep 2022 11:21:43 +0300 [thread overview]
Message-ID: <20220919082143.g4gn5ssbzolnc57b@altlinux.org> (raw)
In-Reply-To: <20220628022100.595243-22-sashal@kernel.org>
On Mon, Jun 27, 2022 at 10:20:41PM -0400, Sasha Levin wrote:
> From: Hyunwoo Kim <imv4bel@gmail.com>
>
> [ Upstream commit a09d2d00af53b43c6f11e6ab3cb58443c2cac8a7 ]
>
> In pxa3xx_gcu_write, a count parameter of type size_t is passed to words of
> type int. Then, copy_from_user() may cause a heap overflow because it is used
> as the third argument of copy_from_user().
Why this commit is still not in the stable branches?
Isn't this is the fix for CVE-2022-39842[1]?
Thanks,
[1] https://nvd.nist.gov/vuln/detail/CVE-2022-39842
>
> Signed-off-by: Hyunwoo Kim <imv4bel@gmail.com>
> Signed-off-by: Helge Deller <deller@gmx.de>
> Signed-off-by: Sasha Levin <sashal@kernel.org>
> ---
> drivers/video/fbdev/pxa3xx-gcu.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/video/fbdev/pxa3xx-gcu.c b/drivers/video/fbdev/pxa3xx-gcu.c
> index 9421d14d0eb0..9e9888e40c57 100644
> --- a/drivers/video/fbdev/pxa3xx-gcu.c
> +++ b/drivers/video/fbdev/pxa3xx-gcu.c
> @@ -381,7 +381,7 @@ pxa3xx_gcu_write(struct file *file, const char *buff,
> struct pxa3xx_gcu_batch *buffer;
> struct pxa3xx_gcu_priv *priv = to_pxa3xx_gcu_priv(file);
>
> - int words = count / 4;
> + size_t words = count / 4;
>
> /* Does not need to be atomic. There's a lock in user space,
> * but anyhow, this is just for statistics. */
> --
> 2.35.1
>
next prev parent reply other threads:[~2022-09-19 8:21 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-28 2:20 [PATCH AUTOSEL 5.15 01/41] spi: spi-cadence: Fix SPI CS gets toggling sporadically Sasha Levin
2022-06-28 2:20 ` [PATCH AUTOSEL 5.15 02/41] spi: cadence: Detect transmit FIFO depth Sasha Levin
2022-06-28 2:20 ` [PATCH AUTOSEL 5.15 03/41] spi: spi-mem: Fix spi_mem_poll_status() Sasha Levin
2022-06-28 2:20 ` [PATCH AUTOSEL 5.15 04/41] regulator: qcom_smd: correct MP5496 ranges Sasha Levin
2022-06-28 2:20 ` [PATCH AUTOSEL 5.15 05/41] ALSA: usb-audio: US16x08: Move overflow check before array access Sasha Levin
2022-06-28 2:20 ` [PATCH AUTOSEL 5.15 06/41] bus: bt1-apb: Don't print error on -EPROBE_DEFER Sasha Levin
2022-06-28 2:20 ` [PATCH AUTOSEL 5.15 07/41] bus: bt1-axi: " Sasha Levin
2022-06-28 2:20 ` [PATCH AUTOSEL 5.15 08/41] drm/vc4: plane: Prevent async update if we don't have a dlist Sasha Levin
2022-06-28 2:20 ` [PATCH AUTOSEL 5.15 09/41] drm/vc4: crtc: Use an union to store the page flip callback Sasha Levin
2022-06-28 2:20 ` [PATCH AUTOSEL 5.15 10/41] drm/vc4: crtc: Move the BO handling out of common page-flip callback Sasha Levin
2022-06-28 2:20 ` [PATCH AUTOSEL 5.15 11/41] selftests: vm: Fix resource leak when return error Sasha Levin
2022-06-28 2:20 ` [PATCH AUTOSEL 5.15 12/41] scsi: ufs: Simplify ufshcd_clear_cmd() Sasha Levin
2022-06-28 2:20 ` [PATCH AUTOSEL 5.15 13/41] scsi: ufs: Support clearing multiple commands at once Sasha Levin
2022-06-28 2:20 ` [PATCH AUTOSEL 5.15 14/41] ALSA: x86: intel_hdmi_audio: enable pm_runtime and set autosuspend delay Sasha Levin
2022-06-28 2:20 ` [PATCH AUTOSEL 5.15 15/41] ALSA: x86: intel_hdmi_audio: use pm_runtime_resume_and_get() Sasha Levin
2022-06-28 2:20 ` [PATCH AUTOSEL 5.15 16/41] hamradio: 6pack: fix array-index-out-of-bounds in decode_std_command() Sasha Levin
2022-06-28 2:20 ` [PATCH AUTOSEL 5.15 17/41] drivers/net/ethernet/neterion/vxge: Fix a use-after-free bug in vxge-main.c Sasha Levin
2022-06-28 2:20 ` [PATCH AUTOSEL 5.15 18/41] powerpc/prom_init: Fix build failure with GCC_PLUGIN_STRUCTLEAK_BYREF_ALL and KASAN Sasha Levin
2022-06-28 2:20 ` [PATCH AUTOSEL 5.15 19/41] spi: rockchip: Unmask IRQ at the final to avoid preemption Sasha Levin
2022-06-28 2:20 ` [PATCH AUTOSEL 5.15 20/41] video: fbdev: skeletonfb: Fix syntax errors in comments Sasha Levin
2022-06-28 2:20 ` [PATCH AUTOSEL 5.15 21/41] video: fbdev: intelfb: Use aperture size from pci_resource_len Sasha Levin
2022-06-28 2:20 ` [PATCH AUTOSEL 5.15 22/41] video: fbdev: pxa3xx-gcu: Fix integer overflow in pxa3xx_gcu_write Sasha Levin
2022-09-19 8:21 ` Vitaly Chikunov [this message]
2022-09-19 22:24 ` Sasha Levin
2022-09-21 5:10 ` Vitaly Chikunov
2022-06-28 2:20 ` [PATCH AUTOSEL 5.15 23/41] video: fbdev: simplefb: Check before clk_put() not needed Sasha Levin
2022-06-28 2:20 ` [PATCH AUTOSEL 5.15 24/41] btrfs: add missing inode updates on each iteration when replacing extents Sasha Levin
2022-06-28 2:20 ` [PATCH AUTOSEL 5.15 25/41] btrfs: do not BUG_ON() on failure to migrate space " Sasha Levin
2022-06-28 2:20 ` [PATCH AUTOSEL 5.15 26/41] io_uring: fix merge error in checking send/recv addr2 flags Sasha Levin
2022-06-28 2:20 ` [PATCH AUTOSEL 5.15 27/41] arch: mips: generic: Add missing of_node_put() in board-ranchu.c Sasha Levin
2022-06-28 2:20 ` [PATCH AUTOSEL 5.15 28/41] mips: mti-malta: Fix refcount leak in malta-time.c Sasha Levin
2022-06-28 2:20 ` [PATCH AUTOSEL 5.15 29/41] mips: ralink: Fix refcount leak in of.c Sasha Levin
2022-06-28 2:20 ` [PATCH AUTOSEL 5.15 30/41] mips: lantiq: falcon: Fix refcount leak bug in sysctrl Sasha Levin
2022-06-28 2:20 ` [PATCH AUTOSEL 5.15 31/41] mips: lantiq: xway: " Sasha Levin
2022-06-28 2:20 ` [PATCH AUTOSEL 5.15 32/41] mips/pic32/pic32mzda: Fix refcount leak bugs Sasha Levin
2022-06-28 2:20 ` [PATCH AUTOSEL 5.15 33/41] mips: dts: ingenic: Add TCU clock to x1000/x1830 tcu device node Sasha Levin
2022-06-28 2:20 ` [PATCH AUTOSEL 5.15 34/41] mips: lantiq: Add missing of_node_put() in irq.c Sasha Levin
2022-06-28 2:20 ` [PATCH AUTOSEL 5.15 35/41] drm/sun4i: Add DMA mask and segment size Sasha Levin
2022-06-28 2:20 ` [PATCH AUTOSEL 5.15 36/41] drm/sun4i: Return if frontend is not present Sasha Levin
2022-06-28 2:20 ` [PATCH AUTOSEL 5.15 37/41] hinic: Replace memcpy() with direct assignment Sasha Levin
2022-06-28 2:20 ` [PATCH AUTOSEL 5.15 38/41] drm/amdgpu: Adjust logic around GTT size (v3) Sasha Levin
2022-06-28 2:20 ` [PATCH AUTOSEL 5.15 39/41] nvme: add a bogus subsystem NQN quirk for Micron MTFDKBA2T0TFH Sasha Levin
2022-06-28 2:20 ` [PATCH AUTOSEL 5.15 40/41] gpio: grgpio: Fix device removing Sasha Levin
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