From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Zheyu Ma <zheyuma97@gmail.com>, Sam Ravnborg <sam@ravnborg.org>,
Sasha Levin <sashal@kernel.org>,
dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org
Subject: [PATCH AUTOSEL 4.4 04/35] video: fbdev: kyro: fix a DoS bug by restricting user input
Date: Thu, 9 Sep 2021 08:00:45 -0400 [thread overview]
Message-ID: <20210909120116.150912-4-sashal@kernel.org> (raw)
In-Reply-To: <20210909120116.150912-1-sashal@kernel.org>
From: Zheyu Ma <zheyuma97@gmail.com>
[ Upstream commit 98a65439172dc69cb16834e62e852afc2adb83ed ]
The user can pass in any value to the driver through the 'ioctl'
interface. The driver dost not check, which may cause DoS bugs.
The following log reveals it:
divide error: 0000 [#1] PREEMPT SMP KASAN PTI
RIP: 0010:SetOverlayViewPort+0x133/0x5f0 drivers/video/fbdev/kyro/STG4000OverlayDevice.c:476
Call Trace:
kyro_dev_overlay_viewport_set drivers/video/fbdev/kyro/fbdev.c:378 [inline]
kyrofb_ioctl+0x2eb/0x330 drivers/video/fbdev/kyro/fbdev.c:603
do_fb_ioctl+0x1f3/0x700 drivers/video/fbdev/core/fbmem.c:1171
fb_ioctl+0xeb/0x130 drivers/video/fbdev/core/fbmem.c:1185
vfs_ioctl fs/ioctl.c:48 [inline]
__do_sys_ioctl fs/ioctl.c:753 [inline]
__se_sys_ioctl fs/ioctl.c:739 [inline]
__x64_sys_ioctl+0x19b/0x220 fs/ioctl.c:739
do_syscall_64+0x32/0x80 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xae
Signed-off-by: Zheyu Ma <zheyuma97@gmail.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/1626235762-2590-1-git-send-email-zheyuma97@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/video/fbdev/kyro/fbdev.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/video/fbdev/kyro/fbdev.c b/drivers/video/fbdev/kyro/fbdev.c
index 5bb01533271e..8482444259ce 100644
--- a/drivers/video/fbdev/kyro/fbdev.c
+++ b/drivers/video/fbdev/kyro/fbdev.c
@@ -372,6 +372,11 @@ static int kyro_dev_overlay_viewport_set(u32 x, u32 y, u32 ulWidth, u32 ulHeight
/* probably haven't called CreateOverlay yet */
return -EINVAL;
+ if (ulWidth == 0 || ulWidth == 0xffffffff ||
+ ulHeight == 0 || ulHeight == 0xffffffff ||
+ (x < 2 && ulWidth + 2 == 0))
+ return -EINVAL;
+
/* Stop Ramdac Output */
DisableRamdacOutput(deviceInfo.pSTGReg);
--
2.30.2
next prev parent reply other threads:[~2021-09-09 13:27 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-09 12:00 [PATCH AUTOSEL 4.4 01/35] crypto: mxs-dcp - Use sg_mapping_iter to copy data Sasha Levin
2021-09-09 12:00 ` [PATCH AUTOSEL 4.4 02/35] PCI: Use pci_update_current_state() in pci_enable_device_flags() Sasha Levin
2021-09-09 12:00 ` [PATCH AUTOSEL 4.4 03/35] iio: dac: ad5624r: Fix incorrect handling of an optional regulator Sasha Levin
2021-09-09 12:00 ` Sasha Levin [this message]
2021-09-09 12:00 ` [PATCH AUTOSEL 4.4 05/35] netlink: Deal with ESRCH error in nlmsg_notify() Sasha Levin
2021-09-09 12:00 ` [PATCH AUTOSEL 4.4 06/35] Smack: Fix wrong semantics in smk_access_entry() Sasha Levin
2021-09-09 12:00 ` [PATCH AUTOSEL 4.4 07/35] usb: host: fotg210: fix the actual_length of an iso packet Sasha Levin
2021-09-09 12:00 ` [PATCH AUTOSEL 4.4 08/35] usb: gadget: u_ether: fix a potential null pointer dereference Sasha Levin
2021-09-09 12:00 ` [PATCH AUTOSEL 4.4 09/35] tty: serial: jsm: hold port lock when reporting modem line changes Sasha Levin
2021-09-09 12:00 ` [PATCH AUTOSEL 4.4 10/35] bpf/tests: Fix copy-and-paste error in double word test Sasha Levin
2021-09-09 12:00 ` [PATCH AUTOSEL 4.4 11/35] bpf/tests: Do not PASS tests without actually testing the result Sasha Levin
2021-09-09 12:00 ` [PATCH AUTOSEL 4.4 12/35] video: fbdev: asiliantfb: Error out if 'pixclock' equals zero Sasha Levin
2021-09-09 12:00 ` [PATCH AUTOSEL 4.4 13/35] video: fbdev: kyro: " Sasha Levin
2021-09-09 12:00 ` [PATCH AUTOSEL 4.4 14/35] video: fbdev: riva: " Sasha Levin
2021-09-09 12:00 ` [PATCH AUTOSEL 4.4 15/35] ipv4: ip_output.c: Fix out-of-bounds warning in ip_copy_addrs() Sasha Levin
2021-09-09 12:00 ` [PATCH AUTOSEL 4.4 16/35] s390/jump_label: print real address in a case of a jump label bug Sasha Levin
2021-09-09 12:00 ` [PATCH AUTOSEL 4.4 17/35] serial: 8250: Define RX trigger levels for OxSemi 950 devices Sasha Levin
2021-09-09 12:00 ` [PATCH AUTOSEL 4.4 18/35] xtensa: ISS: don't panic in rs_init Sasha Levin
2021-09-09 12:01 ` [PATCH AUTOSEL 4.4 19/35] hvsi: don't panic on tty_register_driver failure Sasha Levin
2021-09-09 12:01 ` [PATCH AUTOSEL 4.4 20/35] serial: 8250_pci: make setup_port() parameters explicitly unsigned Sasha Levin
2021-09-09 12:01 ` [PATCH AUTOSEL 4.4 21/35] Bluetooth: skip invalid hci_sync_conn_complete_evt Sasha Levin
2021-09-09 12:01 ` [PATCH AUTOSEL 4.4 22/35] gpu: drm: amd: amdgpu: amdgpu_i2c: fix possible uninitialized-variable access in amdgpu_i2c_router_select_ddc_port() Sasha Levin
2021-09-09 12:01 ` [PATCH AUTOSEL 4.4 23/35] ARM: tegra: tamonten: Fix UART pad setting Sasha Levin
2021-09-09 12:01 ` [PATCH AUTOSEL 4.4 24/35] ACPICA: iASL: Fix for WPBT table with no command-line arguments Sasha Levin
2021-09-10 7:45 ` Pavel Machek
2021-09-11 14:38 ` Sasha Levin
2021-09-13 12:20 ` Rafael J. Wysocki
2021-09-17 19:21 ` Moore, Robert
2021-09-09 12:01 ` [PATCH AUTOSEL 4.4 25/35] rpc: fix gss_svc_init cleanup on failure Sasha Levin
2021-09-09 12:01 ` [PATCH AUTOSEL 4.4 26/35] gfs2: Don't call dlm after protocol is unmounted Sasha Levin
2021-09-09 12:01 ` [PATCH AUTOSEL 4.4 27/35] btrfs: subpage: check if there are compressed extents inside one page Sasha Levin
2021-09-09 13:01 ` David Sterba
2021-09-09 12:01 ` [PATCH AUTOSEL 4.4 28/35] btrfs: subpage: fix race between prepare_pages() and btrfs_releasepage() Sasha Levin
2021-09-09 13:02 ` David Sterba
2021-09-09 12:01 ` [PATCH AUTOSEL 4.4 29/35] ASoC: intel: atom: Revert PCM buffer address setup workaround again Sasha Levin
2021-09-09 12:07 ` Takashi Iwai
2021-09-12 21:26 ` Sasha Levin
2021-09-09 12:01 ` [PATCH AUTOSEL 4.4 30/35] mmc: rtsx_pci: Fix long reads when clock is prescaled Sasha Levin
2021-09-09 12:01 ` [PATCH AUTOSEL 4.4 31/35] cifs: fix wrong release in sess_alloc_buffer() failed path Sasha Levin
2021-09-09 12:01 ` [PATCH AUTOSEL 4.4 32/35] Revert "USB: xhci: fix U1/U2 handling for hardware with XHCI_INTEL_HOST quirk set" Sasha Levin
2021-09-09 12:01 ` [PATCH AUTOSEL 4.4 33/35] parport: remove non-zero check on count Sasha Levin
2021-09-09 12:01 ` [PATCH AUTOSEL 4.4 34/35] ath9k: fix OOB read ar9300_eeprom_restore_internal Sasha Levin
2021-09-09 12:01 ` [PATCH AUTOSEL 4.4 35/35] net: fix NULL pointer reference in cipso_v4_doi_free Sasha Levin
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