This is a note to let you know that I've just added the patch titled
ALSA: hda/ca0132 - fix possible NULL pointer use
to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: alsa-hda-ca0132-fix-possible-null-pointer-use.patch and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
From 46a049dae771b95e77ac6c823330f4a60f600236 Mon Sep 17 00:00:00 2001
From: Arnd Bergmann arnd@arndb.de Date: Wed, 11 Jan 2017 14:39:44 +0100 Subject: ALSA: hda/ca0132 - fix possible NULL pointer use
From: Arnd Bergmann arnd@arndb.de
commit 46a049dae771b95e77ac6c823330f4a60f600236 upstream.
gcc-7 caught what it considers a NULL pointer dereference:
sound/pci/hda/patch_ca0132.c: In function 'dspio_scp.constprop': sound/pci/hda/patch_ca0132.c:1487:4: error: argument 1 null where non-null expected [-Werror=nonnull]
This is plausible from looking at the function, as we compare 'reply' to NULL earlier in it. I have not tried to analyze if there are constraints that make it impossible to hit the bug, but adding another NULL check in the end kills the warning and makes the function more robust.
Signed-off-by: Arnd Bergmann arnd@arndb.de Signed-off-by: Takashi Iwai tiwai@suse.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- sound/pci/hda/patch_ca0132.c | 3 +++ 1 file changed, 3 insertions(+)
--- a/sound/pci/hda/patch_ca0132.c +++ b/sound/pci/hda/patch_ca0132.c @@ -1482,6 +1482,9 @@ static int dspio_scp(struct hda_codec *c } else if (ret_size != reply_data_size) { codec_dbg(codec, "RetLen and HdrLen .NE.\n"); return -EINVAL; + } else if (!reply) { + codec_dbg(codec, "NULL reply\n"); + return -EINVAL; } else { *reply_len = ret_size*sizeof(unsigned int); memcpy(reply, scp_reply.data, *reply_len);
Patches currently in stable-queue which might be from arnd@arndb.de are
queue-4.4/kasan-rework-kconfig-settings.patch queue-4.4/hdpvr-hide-unused-variable.patch queue-4.4/mtd-ichxrom-maybe-uninitialized-with-gcc-4.9.patch queue-4.4/profile-hide-unused-functions-when-config_proc_fs.patch queue-4.4/perf-x86-shut-up-false-positive-wmaybe-uninitialized-warning.patch queue-4.4/hwrng-exynos-use-__maybe_unused-to-hide-pm-functions.patch queue-4.4/usb-cdc_subset-only-build-when-one-driver-is-enabled.patch queue-4.4/ipv4-ipconfig-avoid-unused-ic_proto_used-symbol.patch queue-4.4/revert-power-bq27xxx_battery-remove-unneeded-dependency-in-kconfig.patch queue-4.4/go7007-add-media_camera_support-dependency.patch queue-4.4/scsi-advansys-fix-build-warning-for-pci-n.patch queue-4.4/ssb-mark-ssb_bus_register-as-__maybe_unused.patch queue-4.4/tty-cyclades-cyz_interrupt-is-only-used-for-pci.patch queue-4.4/infiniband-cxgb4-use-pr-format-string-for-printing-resources.patch queue-4.4/video-fbdev-via-remove-possibly-unused-variables.patch queue-4.4/binfmt_elf-compat-avoid-unused-function-warning.patch queue-4.4/drm-gma500-remove-helper-function.patch queue-4.4/fbdev-s6e8ax0-avoid-unused-function-warnings.patch queue-4.4/netfilter-ipvs-avoid-unused-variable-warnings.patch queue-4.4/idle-i7300-add-pci-dependency.patch queue-4.4/b2c2-flexcop-avoid-unused-function-warnings.patch queue-4.4/fbdev-auo_k190x-avoid-unused-function-warnings.patch queue-4.4/cw1200-fix-bogus-maybe-uninitialized-warning.patch queue-4.4/x86-build-silence-the-build-with-make-s.patch queue-4.4/gpio-xgene-mark-pm-functions-as-__maybe_unused.patch queue-4.4/kvm-add-x86_local_apic-dependency.patch queue-4.4/arm-tegra-select-usb_ulpi-from-ehci-rather-than-platform.patch queue-4.4/asoc-mediatek-add-i2c-dependency.patch queue-4.4/reiserfs-avoid-a-wmaybe-uninitialized-warning.patch queue-4.4/scsi-advansys-fix-uninitialized-data-access.patch queue-4.4/mtd-sh_flctl-pass-fifo-as-physical-address.patch queue-4.4/driver-core-use-dev-argument-in-dev_dbg_ratelimited-stub.patch queue-4.4/modsign-hide-openssl-output-in-silent-builds.patch queue-4.4/net-hp100-remove-unnecessary-ifdefs.patch queue-4.4/genirq-msi-add-stubs-for-get_cached_msi_msg-pci_write_msi_msg.patch queue-4.4/asoc-intel-kconfig-fix-build-when-acpi-is-not-enabled.patch queue-4.4/asoc-ux500-add-module_license-tag.patch queue-4.4/wireless-cw1200-use-__maybe_unused-to-hide-pm-functions_.patch queue-4.4/mptfusion-hide-unused-seq_mpt_print_ioc_summary-function.patch queue-4.4/tlan-avoid-unused-label-with-pci-n.patch queue-4.4/usb-musb-ux500-remove-duplicate-check-for-dma_is_compatible.patch queue-4.4/mtd-cfi-enforce-valid-geometry-configuration.patch queue-4.4/thermal-spear-use-__maybe_unused-for-pm-functions.patch queue-4.4/x86-microcode-amd-change-load_microcode_amd-s-param-to-bool-to-fix-preemptibility-bug.patch queue-4.4/video-fbdev-mmp-add-module_license.patch queue-4.4/fbdev-sis-enforce-selection-of-at-least-one-backend.patch queue-4.4/x86-boot-avoid-warning-for-zero-filling-.bss.patch queue-4.4/power-bq27xxx_battery-mark-some-symbols-__maybe_unused.patch queue-4.4/scsi-mvumi-use-__maybe_unused-to-hide-pm-functions.patch queue-4.4/usb-phy-msm-add-regulator-dependency.patch queue-4.4/isdn-icn-remove-a-warning.patch queue-4.4/ncr5380-shut-up-gcc-indentation-warning.patch queue-4.4/arm64-dts-add-cooling-cells-to-cpu-nodes.patch queue-4.4/vmxnet3-prevent-building-with-64k-pages.patch queue-4.4/genksyms-fix-segfault-with-invalid-declarations.patch queue-4.4/x86-platform-add-pci-dependency-for-punit_atom_debug.patch queue-4.4/target-user-fix-cast-from-pointer-to-phys_addr_t.patch queue-4.4/rtlwifi-fix-gcc-6-indentation-warning.patch queue-4.4/alsa-hda-ca0132-fix-possible-null-pointer-use.patch queue-4.4/thermal-fix-intel_soc_dts_iosf_core-dependencies.patch queue-4.4/arm64-define-bug-instruction-without-config_bug.patch queue-4.4/v4l-remove-media_tuner-dependency-for-video_tuner.patch queue-4.4/tc358743-fix-register-i2c_rd-wr-functions.patch queue-4.4/scsi-fdomain-drop-fdomain_pci_tbl-when-built-in.patch queue-4.4/scsi-initio-remove-duplicate-module-device-table.patch queue-4.4/netlink-fix-nla_put_-u8-u16-u32-for-kasan.patch queue-4.4/x86-fpu-math-emu-fix-possible-uninitialized-variable-use.patch queue-4.4/asoc-rockchip-use-__maybe_unused-to-hide-st_irq_syscfg_resume.patch queue-4.4/staging-ste_rmi4-avoid-unused-function-warnings.patch queue-4.4/em28xx-only-use-mt9v011-if-camera-support-is-enabled.patch queue-4.4/pwc-hide-unused-label.patch queue-4.4/input-tca8418_keypad-hide-gcc-4.9-wmaybe-uninitialized-warning.patch queue-4.4/fbdev-sm712fb-avoid-unused-function-warnings.patch queue-4.4/isdn-sc-work-around-type-mismatch-warning.patch queue-4.4/tty-hvc_xen-hide-xen_console_remove-when-unused.patch queue-4.4/virtio_balloon-prevent-uninitialized-variable-use.patch queue-4.4/drm-nouveau-hide-gcc-4.9-wmaybe-uninitialized.patch queue-4.4/dell-wmi-dell-laptop-depends-dmi.patch queue-4.4/x86-add-multiuser-dependency-for-kvm.patch queue-4.4/md-avoid-warning-for-32-bit-sector_t.patch queue-4.4/isdn-eicon-reduce-stack-size-of-sig_ind-function.patch