From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Anant Thazhemadam <anant.thazhemadam@gmail.com>,
syzbot+e27b4fd589762b0b9329@syzkaller.appspotmail.com,
Sean Young <sean@mess.org>,
Mauro Carvalho Chehab <mchehab+huawei@kernel.org>,
Sasha Levin <sashal@kernel.org>,
mchehab@kernel.org, linux-media@vger.kernel.org
Subject: [PATCH AUTOSEL 4.14 20/39] media: usb: dvd-usb: fix uninit-value bug in dibusb_read_eeprom_byte()
Date: Mon, 8 Nov 2021 20:06:30 -0500 [thread overview]
Message-ID: <20211109010649.1191041-20-sashal@kernel.org> (raw)
In-Reply-To: <20211109010649.1191041-1-sashal@kernel.org>
From: Anant Thazhemadam <anant.thazhemadam@gmail.com>
[ Upstream commit 899a61a3305d49e8a712e9ab20d0db94bde5929f ]
In dibusb_read_eeprom_byte(), if dibusb_i2c_msg() fails, val gets
assigned an value that's not properly initialized.
Using kzalloc() in place of kmalloc() for the buffer fixes this issue,
as the val can now be set to 0 in the event dibusb_i2c_msg() fails.
Reported-by: syzbot+e27b4fd589762b0b9329@syzkaller.appspotmail.com
Tested-by: syzbot+e27b4fd589762b0b9329@syzkaller.appspotmail.com
Signed-off-by: Anant Thazhemadam <anant.thazhemadam@gmail.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/media/usb/dvb-usb/dibusb-common.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/media/usb/dvb-usb/dibusb-common.c b/drivers/media/usb/dvb-usb/dibusb-common.c
index bcacb0f220282..3e45642ae186b 100644
--- a/drivers/media/usb/dvb-usb/dibusb-common.c
+++ b/drivers/media/usb/dvb-usb/dibusb-common.c
@@ -226,7 +226,7 @@ int dibusb_read_eeprom_byte(struct dvb_usb_device *d, u8 offs, u8 *val)
u8 *buf;
int rc;
- buf = kmalloc(2, GFP_KERNEL);
+ buf = kzalloc(2, GFP_KERNEL);
if (!buf)
return -ENOMEM;
--
2.33.0
next prev parent reply other threads:[~2021-11-09 1:26 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-09 1:06 [PATCH AUTOSEL 4.14 01/39] Bluetooth: sco: Fix lock_sock() blockage by memcpy_from_msg() Sasha Levin
2021-11-09 1:06 ` [PATCH AUTOSEL 4.14 02/39] Bluetooth: fix use-after-free error in lock_sock_nested() Sasha Levin
2021-11-09 1:06 ` [PATCH AUTOSEL 4.14 03/39] platform/x86: wmi: do not fail if disabling fails Sasha Levin
2021-11-09 1:06 ` [PATCH AUTOSEL 4.14 04/39] MIPS: lantiq: dma: add small delay after reset Sasha Levin
2021-11-09 1:06 ` [PATCH AUTOSEL 4.14 05/39] MIPS: lantiq: dma: reset correct number of channel Sasha Levin
2021-11-09 1:06 ` [PATCH AUTOSEL 4.14 06/39] locking/lockdep: Avoid RCU-induced noinstr fail Sasha Levin
2021-11-09 1:06 ` [PATCH AUTOSEL 4.14 07/39] smackfs: Fix use-after-free in netlbl_catmap_walk() Sasha Levin
2021-11-09 1:06 ` [PATCH AUTOSEL 4.14 08/39] NET: IPV4: fix error "do not initialise globals to 0" Sasha Levin
2021-11-09 1:06 ` [PATCH AUTOSEL 4.14 09/39] x86: Increase exception stack sizes Sasha Levin
2021-11-09 1:06 ` [PATCH AUTOSEL 4.14 10/39] mwifiex: Run SET_BSS_MODE when changing from P2P to STATION vif-type Sasha Levin
2021-11-09 18:06 ` Brian Norris
2021-11-14 14:03 ` Sasha Levin
2021-11-09 1:06 ` [PATCH AUTOSEL 4.14 11/39] mwifiex: Properly initialize private structure on interface type changes Sasha Levin
2021-11-09 1:06 ` [PATCH AUTOSEL 4.14 12/39] media: mt9p031: Fix corrupted frame after restarting stream Sasha Levin
2021-11-09 1:06 ` [PATCH AUTOSEL 4.14 13/39] media: netup_unidvb: handle interrupt properly according to the firmware Sasha Levin
2021-11-09 1:06 ` [PATCH AUTOSEL 4.14 14/39] media: uvcvideo: Set capability in s_param Sasha Levin
2021-11-09 1:06 ` [PATCH AUTOSEL 4.14 15/39] media: s5p-mfc: fix possible null-pointer dereference in s5p_mfc_probe() Sasha Levin
2021-11-09 1:06 ` [PATCH AUTOSEL 4.14 16/39] media: s5p-mfc: Add checking to s5p_mfc_probe() Sasha Levin
2021-11-09 1:06 ` [PATCH AUTOSEL 4.14 17/39] media: mceusb: return without resubmitting URB in case of -EPROTO error Sasha Levin
2021-11-09 1:06 ` [PATCH AUTOSEL 4.14 18/39] ia64: don't do IA64_CMPXCHG_DEBUG without CONFIG_PRINTK Sasha Levin
2021-11-09 1:06 ` [PATCH AUTOSEL 4.14 19/39] ACPICA: Avoid evaluating methods too early during system resume Sasha Levin
2021-11-09 1:06 ` Sasha Levin [this message]
2021-11-09 1:06 ` [PATCH AUTOSEL 4.14 21/39] tracefs: Have tracefs directories not set OTH permission bits by default Sasha Levin
2021-11-09 1:06 ` [PATCH AUTOSEL 4.14 22/39] ath: dfs_pattern_detector: Fix possible null-pointer dereference in channel_detector_create() Sasha Levin
2021-11-09 1:06 ` [PATCH AUTOSEL 4.14 23/39] ACPI: battery: Accept charges over the design capacity as full Sasha Levin
2021-11-09 1:06 ` [PATCH AUTOSEL 4.14 24/39] leaking_addresses: Always print a trailing newline Sasha Levin
2021-11-09 1:06 ` [PATCH AUTOSEL 4.14 25/39] memstick: r592: Fix a UAF bug when removing the driver Sasha Levin
2021-11-09 1:06 ` [PATCH AUTOSEL 4.14 26/39] lib/xz: Avoid overlapping memcpy() with invalid input with in-place decompression Sasha Levin
2021-11-09 1:06 ` [PATCH AUTOSEL 4.14 27/39] lib/xz: Validate the value before assigning it to an enum variable Sasha Levin
2021-11-09 1:06 ` [PATCH AUTOSEL 4.14 28/39] tracing/cfi: Fix cmp_entries_* functions signature mismatch Sasha Levin
2021-11-09 1:06 ` [PATCH AUTOSEL 4.14 29/39] mwl8k: Fix use-after-free in mwl8k_fw_state_machine() Sasha Levin
2021-11-09 1:06 ` [PATCH AUTOSEL 4.14 30/39] PM: hibernate: Get block device exclusively in swsusp_check() Sasha Levin
2021-11-09 1:06 ` [PATCH AUTOSEL 4.14 31/39] iwlwifi: mvm: disable RX-diversity in powersave Sasha Levin
2021-11-09 1:06 ` [PATCH AUTOSEL 4.14 32/39] smackfs: use __GFP_NOFAIL for smk_cipso_doi() Sasha Levin
2021-11-09 1:06 ` [PATCH AUTOSEL 4.14 33/39] ARM: clang: Do not rely on lr register for stacktrace Sasha Levin
2021-11-09 1:06 ` [PATCH AUTOSEL 4.14 34/39] gre/sit: Don't generate link-local addr if addr_gen_mode is IN6_ADDR_GEN_MODE_NONE Sasha Levin
2021-11-09 1:06 ` [PATCH AUTOSEL 4.14 35/39] ARM: 9136/1: ARMv7-M uses BE-8, not BE-32 Sasha Levin
2021-11-09 1:06 ` [PATCH AUTOSEL 4.14 36/39] spi: bcm-qspi: Fix missing clk_disable_unprepare() on error in bcm_qspi_probe() Sasha Levin
2021-11-09 1:06 ` [PATCH AUTOSEL 4.14 37/39] parisc: fix warning in flush_tlb_all Sasha Levin
2021-11-09 1:06 ` [PATCH AUTOSEL 4.14 38/39] task_stack: Fix end_of_stack() for architectures with upwards-growing stack Sasha Levin
2021-11-09 1:06 ` [PATCH AUTOSEL 4.14 39/39] parisc/kgdb: add kgdb_roundup() to make kgdb work with idle polling Sasha Levin
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