From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: YueHaibing <yuehaibing@huawei.com>,
Hulk Robot <hulkci@huawei.com>,
Geert Uytterhoeven <geert+renesas@glider.be>,
Axel Lin <axel.lin@ingics.com>,
Mukesh Ojha <mojha@codeaurora.org>,
Mark Brown <broonie@kernel.org>, Sasha Levin <sashal@kernel.org>,
linux-spi@vger.kernel.org
Subject: [PATCH AUTOSEL 5.1 06/51] spi: bitbang: Fix NULL pointer dereference in spi_unregister_master
Date: Tue, 25 Jun 2019 23:40:22 -0400 [thread overview]
Message-ID: <20190626034117.23247-6-sashal@kernel.org> (raw)
In-Reply-To: <20190626034117.23247-1-sashal@kernel.org>
From: YueHaibing <yuehaibing@huawei.com>
[ Upstream commit 5caaf29af5ca82d5da8bc1d0ad07d9e664ccf1d8 ]
If spi_register_master fails in spi_bitbang_start
because device_add failure, We should return the
error code other than 0, otherwise calling
spi_bitbang_stop may trigger NULL pointer dereference
like this:
BUG: KASAN: null-ptr-deref in __list_del_entry_valid+0x45/0xd0
Read of size 8 at addr 0000000000000000 by task syz-executor.0/3661
CPU: 0 PID: 3661 Comm: syz-executor.0 Not tainted 5.1.0+ #28
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1ubuntu1 04/01/2014
Call Trace:
dump_stack+0xa9/0x10e
? __list_del_entry_valid+0x45/0xd0
? __list_del_entry_valid+0x45/0xd0
__kasan_report+0x171/0x18d
? __list_del_entry_valid+0x45/0xd0
kasan_report+0xe/0x20
__list_del_entry_valid+0x45/0xd0
spi_unregister_controller+0x99/0x1b0
spi_lm70llp_attach+0x3ae/0x4b0 [spi_lm70llp]
? 0xffffffffc1128000
? klist_next+0x131/0x1e0
? driver_detach+0x40/0x40 [parport]
port_check+0x3b/0x50 [parport]
bus_for_each_dev+0x115/0x180
? subsys_dev_iter_exit+0x20/0x20
__parport_register_driver+0x1f0/0x210 [parport]
? 0xffffffffc1150000
do_one_initcall+0xb9/0x3b5
? perf_trace_initcall_level+0x270/0x270
? kasan_unpoison_shadow+0x30/0x40
? kasan_unpoison_shadow+0x30/0x40
do_init_module+0xe0/0x330
load_module+0x38eb/0x4270
? module_frob_arch_sections+0x20/0x20
? kernel_read_file+0x188/0x3f0
? find_held_lock+0x6d/0xd0
? fput_many+0x1a/0xe0
? __do_sys_finit_module+0x162/0x190
__do_sys_finit_module+0x162/0x190
? __ia32_sys_init_module+0x40/0x40
? __mutex_unlock_slowpath+0xb4/0x3f0
? wait_for_completion+0x240/0x240
? vfs_write+0x160/0x2a0
? lockdep_hardirqs_off+0xb5/0x100
? mark_held_locks+0x1a/0x90
? do_syscall_64+0x14/0x2a0
do_syscall_64+0x72/0x2a0
entry_SYSCALL_64_after_hwframe+0x49/0xbe
Reported-by: Hulk Robot <hulkci@huawei.com>
Fixes: 702a4879ec33 ("spi: bitbang: Let spi_bitbang_start() take a reference to master")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Axel Lin <axel.lin@ingics.com>
Reviewed-by: Mukesh Ojha <mojha@codeaurora.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/spi/spi-bitbang.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/spi/spi-bitbang.c b/drivers/spi/spi-bitbang.c
index dd9a8c54a693..be95be4fe985 100644
--- a/drivers/spi/spi-bitbang.c
+++ b/drivers/spi/spi-bitbang.c
@@ -403,7 +403,7 @@ int spi_bitbang_start(struct spi_bitbang *bitbang)
if (ret)
spi_master_put(master);
- return 0;
+ return ret;
}
EXPORT_SYMBOL_GPL(spi_bitbang_start);
--
2.20.1
next prev parent reply other threads:[~2019-06-26 3:51 UTC|newest]
Thread overview: 67+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-26 3:40 [PATCH AUTOSEL 5.1 01/51] HID: i2c-hid: add iBall Aer3 to descriptor override Sasha Levin
2019-06-26 3:40 ` [PATCH AUTOSEL 5.1 02/51] ASoC : cs4265 : readable register too low Sasha Levin
2019-06-26 3:40 ` [PATCH AUTOSEL 5.1 03/51] ASoC: ak4458: add return value for ak4458_probe Sasha Levin
2019-06-26 3:40 ` [PATCH AUTOSEL 5.1 04/51] ASoC: soc-pcm: BE dai needs prepare when pause release after resume Sasha Levin
2019-06-26 3:40 ` [PATCH AUTOSEL 5.1 05/51] ASoC: ak4458: rstn_control - return a non-zero on error only Sasha Levin
2019-06-26 3:40 ` Sasha Levin [this message]
2019-06-26 3:40 ` [PATCH AUTOSEL 5.1 07/51] ASoC: soc-dpm: fixup DAI active unbalance Sasha Levin
2019-06-26 10:03 ` Mark Brown
2019-06-27 0:20 ` Sasha Levin
2019-07-01 16:18 ` Mark Brown
2019-07-03 14:16 ` Sasha Levin
2019-06-26 3:40 ` [PATCH AUTOSEL 5.1 08/51] ASoC: core: lock client_mutex while removing link components Sasha Levin
2019-06-26 10:37 ` Mark Brown
2019-06-27 0:24 ` Sasha Levin
2019-06-26 3:40 ` [PATCH AUTOSEL 5.1 09/51] iommu/vt-d: Fix lock inversion between iommu->lock and device_domain_lock Sasha Levin
2019-06-26 6:56 ` Joerg Roedel
2019-06-27 0:27 ` Sasha Levin
2019-06-26 3:40 ` [PATCH AUTOSEL 5.1 10/51] iommu/vt-d: Set the right field for Page Walk Snoop Sasha Levin
2019-06-26 3:40 ` [PATCH AUTOSEL 5.1 11/51] ASoC: sun4i-codec: fix first delay on Speaker Sasha Levin
2019-06-26 10:37 ` Mark Brown
2019-07-03 14:20 ` Sasha Levin
2019-07-03 17:07 ` Mark Brown
2019-07-03 18:10 ` Sasha Levin
2019-07-03 20:08 ` Mark Brown
2019-06-26 3:40 ` [PATCH AUTOSEL 5.1 12/51] HID: a4tech: fix horizontal scrolling Sasha Levin
2019-06-26 3:40 ` [PATCH AUTOSEL 5.1 13/51] ASoC: Intel: Baytrail: add quirk for Aegex 10 (RU2) tablet Sasha Levin
2019-06-26 3:40 ` [PATCH AUTOSEL 5.1 14/51] ASoC: hda: fix unbalanced codec dev refcount for HDA_DEV_ASOC Sasha Levin
2019-06-26 3:40 ` [PATCH AUTOSEL 5.1 15/51] drm/mediatek: fix unbind functions Sasha Levin
2019-06-26 3:40 ` [PATCH AUTOSEL 5.1 16/51] drm/mediatek: unbind components in mtk_drm_unbind() Sasha Levin
2019-06-26 3:40 ` [PATCH AUTOSEL 5.1 17/51] drm/mediatek: call drm_atomic_helper_shutdown() when unbinding driver Sasha Levin
2019-06-26 3:40 ` [PATCH AUTOSEL 5.1 18/51] drm/mediatek: clear num_pipes when unbind driver Sasha Levin
2019-06-26 3:40 ` [PATCH AUTOSEL 5.1 19/51] drm/mediatek: call mtk_dsi_stop() after mtk_drm_crtc_atomic_disable() Sasha Levin
2019-06-26 3:40 ` [PATCH AUTOSEL 5.1 20/51] ASoC: max98090: remove 24-bit format support if RJ is 0 Sasha Levin
2019-06-26 3:40 ` [PATCH AUTOSEL 5.1 21/51] ASoC: sun4i-i2s: Fix sun8i tx channel offset mask Sasha Levin
2019-06-26 3:40 ` [PATCH AUTOSEL 5.1 22/51] ASoC: sun4i-i2s: Add offset to RX channel select Sasha Levin
2019-06-26 3:40 ` [PATCH AUTOSEL 5.1 23/51] x86/CPU: Add more Icelake model numbers Sasha Levin
2019-06-26 3:40 ` [PATCH AUTOSEL 5.1 24/51] usb: gadget: fusb300_udc: Fix memory leak of fusb300->ep[i] Sasha Levin
2019-06-26 3:40 ` [PATCH AUTOSEL 5.1 25/51] usb: gadget: udc: lpc32xx: allocate descriptor with GFP_ATOMIC Sasha Levin
2019-06-26 3:40 ` [PATCH AUTOSEL 5.1 26/51] usb: gadget: dwc2: fix zlp handling Sasha Levin
2019-06-26 3:40 ` [PATCH AUTOSEL 5.1 27/51] ASoC: Intel: cht_bsw_max98090: fix kernel oops with platform_name override Sasha Levin
2019-06-26 3:40 ` [PATCH AUTOSEL 5.1 28/51] ASoC: Intel: bytcht_es8316: " Sasha Levin
2019-06-26 3:40 ` [PATCH AUTOSEL 5.1 29/51] ASoC: Intel: cht_bsw_nau8824: " Sasha Levin
2019-06-26 3:40 ` [PATCH AUTOSEL 5.1 30/51] ASoC: Intel: cht_bsw_rt5672: " Sasha Levin
2019-06-26 3:40 ` [PATCH AUTOSEL 5.1 31/51] ASoC: core: move DAI pre-links initiation to snd_soc_instantiate_card Sasha Levin
2019-06-26 10:38 ` Mark Brown
2019-06-26 3:40 ` [PATCH AUTOSEL 5.1 32/51] ALSA: hdac: fix memory release for SST and SOF drivers Sasha Levin
2019-06-26 3:40 ` [PATCH AUTOSEL 5.1 33/51] SoC: rt274: Fix internal jack assignment in set_jack callback Sasha Levin
2019-06-26 3:40 ` [PATCH AUTOSEL 5.1 34/51] scsi: hpsa: correct ioaccel2 chaining Sasha Levin
2019-06-26 3:40 ` [PATCH AUTOSEL 5.1 35/51] gpio: pca953x: hack to fix 24 bit gpio expanders Sasha Levin
2019-06-26 3:40 ` [PATCH AUTOSEL 5.1 36/51] drm: panel-orientation-quirks: Add quirk for GPD pocket2 Sasha Levin
2019-06-26 3:40 ` [PATCH AUTOSEL 5.1 37/51] drm: panel-orientation-quirks: Add quirk for GPD MicroPC Sasha Levin
2019-06-26 3:40 ` [PATCH AUTOSEL 5.1 38/51] ASoC: core: Fix deadlock in snd_soc_instantiate_card() Sasha Levin
2019-06-26 10:39 ` Mark Brown
2019-06-27 0:24 ` Sasha Levin
2019-06-26 3:40 ` [PATCH AUTOSEL 5.1 39/51] ASoC: Intel: sst: fix kmalloc call with wrong flags Sasha Levin
2019-06-26 3:40 ` [PATCH AUTOSEL 5.1 40/51] platform/x86: asus-wmi: Only Tell EC the OS will handle display hotkeys from asus_nb_wmi Sasha Levin
2019-06-26 3:40 ` [PATCH AUTOSEL 5.1 41/51] platform/x86: intel-vbtn: Report switch events when event wakes device Sasha Levin
2019-06-26 3:40 ` [PATCH AUTOSEL 5.1 42/51] platform/x86: mlx-platform: Fix parent device in i2c-mux-reg device registration Sasha Levin
2019-06-26 3:40 ` [PATCH AUTOSEL 5.1 43/51] platform/mellanox: mlxreg-hotplug: Add devm_free_irq call to remove flow Sasha Levin
2019-06-26 3:41 ` [PATCH AUTOSEL 5.1 44/51] i2c: pca-platform: Fix GPIO lookup code Sasha Levin
2019-06-26 3:41 ` [PATCH AUTOSEL 5.1 45/51] arm64: tlbflush: Ensure start/end of address range are aligned to stride Sasha Levin
2019-06-26 3:41 ` [PATCH AUTOSEL 5.1 46/51] cpuset: restore sanity to cpuset_cpus_allowed_fallback() Sasha Levin
2019-06-26 3:41 ` [PATCH AUTOSEL 5.1 47/51] scripts/decode_stacktrace.sh: prefix addr2line with $CROSS_COMPILE Sasha Levin
2019-06-26 3:41 ` [PATCH AUTOSEL 5.1 48/51] mm/mlock.c: change count_mm_mlocked_page_nr return type Sasha Levin
2019-06-26 3:41 ` [PATCH AUTOSEL 5.1 49/51] tracing: avoid build warning with HAVE_NOP_MCOUNT Sasha Levin
2019-06-26 3:41 ` [PATCH AUTOSEL 5.1 50/51] module: Fix livepatch/ftrace module text permissions race Sasha Levin
2019-06-26 3:41 ` [PATCH AUTOSEL 5.1 51/51] ftrace: Fix NULL pointer dereference in free_ftrace_func_mapper() Sasha Levin
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