ci2 starts bisection 2023-09-25 05:12:10.657160031 +0000 UTC m=+1025662.686334134 bisecting fixing commit since ca48fc16c49388400eddd6c6614593ebf7c7726a building syzkaller on 90c93c40627cb0ac3c2c7cb99d807fd4c137adcb ensuring issue is reproducible on original commit ca48fc16c49388400eddd6c6614593ebf7c7726a testing commit ca48fc16c49388400eddd6c6614593ebf7c7726a gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 53b7e6cab3e4234a5cefd8fa7ca3e457f0c8cd15d8cd861384b1c2d912832bc4 all runs: crashed: WARNING in smsusb_term_device representative crash: WARNING in smsusb_term_device, types: [WARNING] check whether we can drop unnecessary instrumentation disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN KASAN], they are not needed testing commit ca48fc16c49388400eddd6c6614593ebf7c7726a gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b68de4657bc8b7ee5ae24fa3bded4a857c65f124e8c6546739a83aae9d4f048c all runs: crashed: WARNING in smsusb_term_device representative crash: WARNING in smsusb_term_device, types: [WARNING] the bug reproduces without the instrumentation disabling configs for [HANG LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP], they are not needed kconfig minimization: base=3820 full=7524 leaves diff=1994 split chunks (needed=false): <1994> split chunk #0 of len 1994 into 5 parts testing without sub-chunk 1/5 disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN KASAN], they are not needed testing commit ca48fc16c49388400eddd6c6614593ebf7c7726a gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 5767837412bbd09ac9878d0b2a2d62395135edc224926a3bb3134428189dd96d all runs: crashed: WARNING in smsusb_term_device representative crash: WARNING in smsusb_term_device, types: [WARNING] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [HANG LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit ca48fc16c49388400eddd6c6614593ebf7c7726a gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 1f20473c58c9d8a684afd86d92dcca5e3d8da2486582079169ec178a3c1c77fb all runs: crashed: WARNING in smsusb_term_device representative crash: WARNING in smsusb_term_device, types: [WARNING] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN KASAN LOCKDEP], they are not needed testing commit ca48fc16c49388400eddd6c6614593ebf7c7726a gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 5827b9494ca5b8185f29e9798a7bf6c4b1f45f61c7295eded191ba436262b5c3 all runs: crashed: WARNING in smsusb_term_device representative crash: WARNING in smsusb_term_device, types: [WARNING] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [HANG LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit ca48fc16c49388400eddd6c6614593ebf7c7726a gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 3360d3a806298e4a7966da87216595aa684f7d48a19c580502ba0874132995c8 all runs: OK false negative chance: 0.000 testing without sub-chunk 5/5 disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed testing commit ca48fc16c49388400eddd6c6614593ebf7c7726a gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b29da9b29f342be342d851cb81a051d113f63913c3446022020125f45a49b3bb all runs: OK false negative chance: 0.000 minimized to 797 configs; suspects: [AF_RXRPC ARCH_ENABLE_MEMORY_HOTREMOVE ATM AX25 BCMA BLK_DEV_ZONED BPF_SYSCALL CARDBUS CFG80211 CFG80211_WEXT CMA COMMON_CLK CONTIG_ALLOC CRYPTO_842 CRYPTO_LZ4 CRYPTO_LZ4HC CRYPTO_LZO CRYPTO_ZSTD DAX DLM DVB_CORE ENCRYPTED_KEYS EXTCON FB GENEVE GPIOLIB HAMRADIO HAVE_CLK HID_SENSOR_HUB HID_SMARTJOYPLUS HID_THRUSTMASTER HID_ZEROPLUS I2C_MUX IIO INFINIBAND INFINIBAND_ADDR_TRANS INFINIBAND_IPOIB INFINIBAND_USER_ACCESS INFINIBAND_VIRT_DMA INPUT_TABLET INPUT_TOUCHSCREEN IP_SCTP IRQ_REMAP KVM KVM_INTEL L2TP LIBNVDIMM MEDIA_ANALOG_TV_SUPPORT MEDIA_CAMERA_SUPPORT MEDIA_CEC_SUPPORT MEDIA_COMMON_OPTIONS MEDIA_CONTROLLER MEDIA_DIGITAL_TV_SUPPORT MEDIA_RADIO_SUPPORT MEDIA_SDR_SUPPORT MEDIA_SUPPORT MEDIA_TEST_SUPPORT MEDIA_USB_SUPPORT MEMORY_HOTPLUG MEMORY_HOTREMOVE MFD_DLN2 MFD_RETU MFD_VIPERBOARD MMC MTD MTD_UBI NETFILTER_CONNCOUNT NET_IPGRE NET_IPGRE_DEMUX NFS_V4_1 NF_SOCKET_IPV6 NF_TABLES NF_TABLES_ARP NF_TPROXY_IPV4 NF_TPROXY_IPV6 NILFS2_FS NLMON NLS_CODEPAGE_1250 NLS_CODEPAGE_1251 NLS_CODEPAGE_737 NLS_CODEPAGE_775 NLS_CODEPAGE_850 NLS_CODEPAGE_852 NLS_CODEPAGE_855 NLS_CODEPAGE_857 NLS_CODEPAGE_860 NLS_CODEPAGE_861 NLS_CODEPAGE_862 NLS_CODEPAGE_863 NLS_CODEPAGE_864 NLS_CODEPAGE_865 NLS_CODEPAGE_866 NLS_CODEPAGE_869 NLS_CODEPAGE_874 NLS_CODEPAGE_932 NLS_CODEPAGE_936 NLS_CODEPAGE_949 NLS_CODEPAGE_950 NLS_ISO8859_13 NLS_ISO8859_14 NLS_ISO8859_15 NLS_ISO8859_2 NLS_ISO8859_3 NLS_ISO8859_4 NLS_ISO8859_5 NLS_ISO8859_6 NLS_ISO8859_7 NLS_ISO8859_8 NLS_ISO8859_9 NLS_KOI8_R NLS_KOI8_U NLS_MAC_CELTIC NLS_MAC_CENTEURO NLS_MAC_CROATIAN NLS_MAC_CYRILLIC NLS_MAC_GAELIC NLS_MAC_GREEK NLS_MAC_ICELAND NLS_MAC_INUIT NLS_MAC_ROMAN NLS_MAC_ROMANIAN NLS_MAC_TURKISH NOP_USB_XCEIV NOZOMI NTFS3_FS NTFS3_FS_POSIX_ACL NTFS3_LZX_XPRESS NTFS_FS NTFS_RW NULL_TTY NUMA_BALANCING NUMA_BALANCING_DEFAULT_ENABLED NUMA_EMU NUMA_KEEP_MEMINFO NVDIMM_DAX NVDIMM_KEYS NVDIMM_PFN NVME_CORE NVME_FABRICS NVME_FC NVME_MULTIPATH NVME_RDMA NVME_TARGET NVME_TARGET_FC NVME_TARGET_FCLOOP NVME_TARGET_LOOP NVME_TARGET_RDMA NVME_TARGET_TCP NVME_TCP N_GSM N_HDLC OCFS2_DEBUG_FS OCFS2_FS OCFS2_FS_O2CB OCFS2_FS_STATS OCFS2_FS_USERSPACE_CLUSTER OF_GPIO OF_PMEM OMFS_FS OPENVSWITCH OPENVSWITCH_GENEVE OPENVSWITCH_GRE OPENVSWITCH_VXLAN ORANGEFS_FS OSF_PARTITION OVERLAY_FS OVERLAY_FS_INDEX OVERLAY_FS_REDIRECT_ALWAYS_FOLLOW 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USB_STORAGE_CYPRESS_ATACB USB_STORAGE_DATAFAB USB_STORAGE_ENE_UB6250 USB_STORAGE_FREECOM USB_STORAGE_ISD200 USB_STORAGE_JUMPSHOT USB_STORAGE_KARMA USB_STORAGE_ONETOUCH USB_STORAGE_REALTEK USB_STORAGE_SDDR09 USB_STORAGE_SDDR55 USB_STORAGE_USBAT USB_STV06XX USB_TEST USB_TMC USB_TRANCEVIBRATOR USB_U132_HCD USB_UAS USB_UEAGLEATM USB_ULPI_BUS USB_USBNET USB_USS720 USB_U_AUDIO USB_U_ETHER USB_U_SERIAL USB_VIDEO_CLASS USB_VIDEO_CLASS_INPUT_EVDEV USB_VL600 USB_WDM USB_XHCI_DBGCAP USB_XHCI_PLATFORM USB_XUSBATM USB_YUREX USERFAULTFD USERIO USERMODE_DRIVER USER_RETURN_NOTIFIER U_SERIAL_CONSOLE V4L2_MEM2MEM_DEV V4L_TEST_DRIVERS VALIDATE_FS_PARSER VDPA VDPA_SIM VDPA_SIM_BLOCK VDPA_SIM_NET VDPA_USER VETH VFIO VFIO_IOMMU_TYPE1 VFIO_PCI VFIO_PCI_CORE VFIO_PCI_INTX VFIO_PCI_MMAP VFIO_VIRQFD VGASTATE VHOST VHOST_CROSS_ENDIAN_LEGACY VHOST_IOTLB VHOST_NET VHOST_RING VHOST_VDPA VHOST_VSOCK VIDEOBUF2_CORE VIDEOBUF2_DMA_CONTIG VIDEOBUF2_DMA_SG VIDEOBUF2_MEMOPS VIDEOBUF2_V4L2 VIDEOBUF2_VMALLOC VIDEOMODE_HELPERS VIDEO_AU0828 VIDEO_AU0828_RC VIDEO_AU0828_V4L2 VIDEO_CS53L32A VIDEO_CX231XX VIDEO_CX231XX_ALSA VIDEO_CX231XX_DVB VIDEO_CX231XX_RC VIDEO_CX2341X VIDEO_CX25840 VIDEO_DEV VIDEO_EM28XX VIDEO_EM28XX_ALSA VIDEO_EM28XX_DVB VIDEO_EM28XX_RC VIDEO_EM28XX_V4L2 VIDEO_GO7007 VIDEO_GO7007_LOADER VIDEO_GO7007_USB VIDEO_GO7007_USB_S2250_BOARD VIDEO_HDPVR VIDEO_MSP3400 VIDEO_PVRUSB2 VIDEO_PVRUSB2_DVB VIDEO_PVRUSB2_SYSFS VIDEO_SAA711X VIDEO_STK1160 VIDEO_STK1160_COMMON VIDEO_TUNER VIDEO_TVEEPROM VIDEO_USBTV VIDEO_V4L2_I2C VIDEO_V4L2_SUBDEV_API VIDEO_V4L2_TPG VIDEO_VICODEC VIDEO_VIM2M VIDEO_VIMC VIDEO_VIVID VIDEO_VIVID_CEC VIDEO_WM8775 VIPERBOARD_ADC VIRTIO_BALLOON VIRTIO_DMA_SHARED_BUFFER VIRTIO_MEM VIRTIO_MMIO VIRTIO_MMIO_CMDLINE_DEVICES VIRTIO_PMEM VIRTIO_VDPA VIRTIO_VSOCKETS VIRTIO_VSOCKETS_COMMON VIRT_WIFI VLAN_8021Q VLAN_8021Q_GVRP VLAN_8021Q_MVRP VMAP_PFN VMWARE_VMCI VMXNET3 VP_VDPA VSOCKETS VSOCKETS_DIAG VSOCKETS_LOOPBACK VSOCKMON VT_HW_CONSOLE_BINDING VXFS_FS VXLAN WANT_DEV_COREDUMP WEXT_CORE WEXT_PRIV WEXT_PROC WIREGUARD WIRELESS WIRELESS_EXT WLAN WLAN_VENDOR_ADMTEK WLAN_VENDOR_PURELIFI WLAN_VENDOR_SILABS X86_SGX X86_SGX_KVM X86_X2APIC X86_X32_ABI XARRAY_MULTI XDP_SOCKETS XDP_SOCKETS_DIAG XFRM_ESPINTCP XFRM_INTERFACE XFRM_IPCOMP XFRM_MIGRATE XFRM_OFFLOAD XFRM_STATISTICS XFRM_SUB_POLICY XFRM_USER_COMPAT XFS_FS XFS_POSIX_ACL XFS_QUOTA XFS_RT XFS_SUPPORT_V4 XOR_BLOCKS YENTA YENTA_ENE_TUNE YENTA_O2 YENTA_RICOH YENTA_TI YENTA_TOSHIBA ZBUD ZEROPLUS_FF ZLIB_DEFLATE ZONEFS_FS ZONE_DEVICE ZPOOL ZRAM ZRAM_DEF_COMP_LZORLE ZSMALLOC ZSTD_COMPRESS ZSWAP ZSWAP_COMPRESSOR_DEFAULT_LZO ZSWAP_ZPOOL_DEFAULT_ZBUD] disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed testing current HEAD d23900f974e0fb995b36ef47283a5aa74ca25f51 testing commit d23900f974e0fb995b36ef47283a5aa74ca25f51 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: aac7833f90b5771fea45e0f50bb6bac8de7dc638451616c929dfbe9f93e7f40c all runs: OK false negative chance: 0.000 # git bisect start d23900f974e0fb995b36ef47283a5aa74ca25f51 ca48fc16c49388400eddd6c6614593ebf7c7726a Bisecting: 2455 revisions left to test after this (roughly 11 steps) [c3b322b84ab5dda7eaca9ded763628b7467734f4] usb: dwc3: qcom: Fix potential memory leak determine whether the revision contains the guilty commit revision ca48fc16c49388400eddd6c6614593ebf7c7726a crashed and is reachable testing commit c3b322b84ab5dda7eaca9ded763628b7467734f4 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 65039f61f8b3d3b51908860b09aca8f6205286486579b4a49f51e2ba10c68615 all runs: OK false negative chance: 0.000 # git bisect bad c3b322b84ab5dda7eaca9ded763628b7467734f4 Bisecting: 1226 revisions left to test after this (roughly 10 steps) [71e60a58d7f6e4831547a760ed02409faca10f22] power: supply: bq24190: Call power_supply_changed() after updating input current determine whether the revision contains the guilty commit revision ca48fc16c49388400eddd6c6614593ebf7c7726a crashed and is reachable testing commit 71e60a58d7f6e4831547a760ed02409faca10f22 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 854cf068a71748574f2809bdc11c9138be594b093b0728c94fa87bd72749087a all runs: crashed: WARNING in smsusb_term_device representative crash: WARNING in smsusb_term_device, types: [WARNING] # git bisect good 71e60a58d7f6e4831547a760ed02409faca10f22 Bisecting: 613 revisions left to test after this (roughly 9 steps) [854156d12caa9d36de1cf5f084591c7686cc8a9d] ksmbd: validate session id and tree id in the compound request determine whether the revision contains the guilty commit revision ca48fc16c49388400eddd6c6614593ebf7c7726a crashed and is reachable testing commit 854156d12caa9d36de1cf5f084591c7686cc8a9d gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 541a429cb2b7eab30a18ce54c44189f8d728df89db25f74b41ee770efffbd21e all runs: crashed: WARNING in smsusb_term_device representative crash: WARNING in smsusb_term_device, types: [WARNING] # git bisect good 854156d12caa9d36de1cf5f084591c7686cc8a9d Bisecting: 306 revisions left to test after this (roughly 8 steps) [6525435d147b3476045c2a489ceceeaeab509b5e] watchdog/perf: more properly prevent false positives with turbo modes determine whether the revision contains the guilty commit revision 854156d12caa9d36de1cf5f084591c7686cc8a9d crashed and is reachable testing commit 6525435d147b3476045c2a489ceceeaeab509b5e gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 26705cf7c9a863e1575c13825e6a2f2cd451cee7becc3ca0b7b7177034ca5fdf all runs: crashed: WARNING in smsusb_term_device representative crash: WARNING in smsusb_term_device, types: [WARNING] # git bisect good 6525435d147b3476045c2a489ceceeaeab509b5e Bisecting: 153 revisions left to test after this (roughly 7 steps) [4842a846398a19692b86e5b97faa8b7a0902efa8] arm64: dts: qcom: sm8250-edo: Panel framebuffer is 2.5k instead of 4k determine whether the revision contains the guilty commit revision ca48fc16c49388400eddd6c6614593ebf7c7726a crashed and is reachable testing commit 4842a846398a19692b86e5b97faa8b7a0902efa8 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 847b41efa64eac866de338ffd9bade27c53e0bae0626e36aa1f0ef3648c56e89 all runs: crashed: WARNING in smsusb_term_device representative crash: WARNING in smsusb_term_device, types: [WARNING] # git bisect good 4842a846398a19692b86e5b97faa8b7a0902efa8 Bisecting: 76 revisions left to test after this (roughly 6 steps) [e2e52c8dfbfdbe10e7a49e4282df33a9f1677b0c] PCI: vmd: Fix uninitialized variable usage in vmd_enable_domain() determine whether the revision contains the guilty commit revision 6525435d147b3476045c2a489ceceeaeab509b5e crashed and is reachable testing commit e2e52c8dfbfdbe10e7a49e4282df33a9f1677b0c gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 8fdb8cc24f9fa7f55eefbe05506330e3bbe84ac6c785654506c268dd7041accc all runs: crashed: WARNING in smsusb_term_device representative crash: WARNING in smsusb_term_device, types: [WARNING] # git bisect good e2e52c8dfbfdbe10e7a49e4282df33a9f1677b0c Bisecting: 38 revisions left to test after this (roughly 5 steps) [b91748bdbfb10673bc128179eb71cf66cb9641c4] Revert "drm/amd/display: edp do not add non-edid timings" determine whether the revision contains the guilty commit revision ca48fc16c49388400eddd6c6614593ebf7c7726a crashed and is reachable testing commit b91748bdbfb10673bc128179eb71cf66cb9641c4 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: bcc377fd9414ec3ad56d4d3cc52cbb4a36eee5946a0c6bf79cdc99f895ebb7fa all runs: crashed: WARNING in smsusb_term_device representative crash: WARNING in smsusb_term_device, types: [WARNING] # git bisect good b91748bdbfb10673bc128179eb71cf66cb9641c4 Bisecting: 19 revisions left to test after this (roughly 4 steps) [9812b33d175cf90fda8e5f1a36855c048be4984a] serial: 8250: omap: Fix freeing of resources on failed register determine whether the revision contains the guilty commit revision 71e60a58d7f6e4831547a760ed02409faca10f22 crashed and is reachable testing commit 9812b33d175cf90fda8e5f1a36855c048be4984a gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: e99be9f8d154f127feb2c8a953bf6876a9ac4b4c3e7fe797e036eb9e5ece39e8 all runs: crashed: WARNING in smsusb_term_device representative crash: WARNING in smsusb_term_device, types: [WARNING] # git bisect good 9812b33d175cf90fda8e5f1a36855c048be4984a Bisecting: 9 revisions left to test after this (roughly 3 steps) [8abb53c5167cfb5bb275512a3da4ec2468478626] media: usb: siano: Fix warning due to null work_func_t function pointer determine whether the revision contains the guilty commit revision 71e60a58d7f6e4831547a760ed02409faca10f22 crashed and is reachable testing commit 8abb53c5167cfb5bb275512a3da4ec2468478626 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 15789e3c3c55dd5f42e81083bf63e29905288d6c6ce4731895cda79c8e08b854 all runs: OK false negative chance: 0.000 # git bisect bad 8abb53c5167cfb5bb275512a3da4ec2468478626 Bisecting: 4 revisions left to test after this (roughly 2 steps) [a8af55f7f4879c8fdd3db60205b64ef79ef70dcc] media: usb: Check az6007_read() return value determine whether the revision contains the guilty commit revision 71e60a58d7f6e4831547a760ed02409faca10f22 crashed and is reachable testing commit a8af55f7f4879c8fdd3db60205b64ef79ef70dcc gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 3e58e9e9f44624a7b231db9ff47d4181cc19e21d4e4daadc8db44a7273d9ee91 all runs: crashed: WARNING in smsusb_term_device representative crash: WARNING in smsusb_term_device, types: [WARNING] # git bisect good a8af55f7f4879c8fdd3db60205b64ef79ef70dcc Bisecting: 2 revisions left to test after this (roughly 1 step) [c0d500726ce25394a7310f07e6aba54525b67be6] media: amphion: drop repeated codec data for vc1g format determine whether the revision contains the guilty commit revision 71e60a58d7f6e4831547a760ed02409faca10f22 crashed and is reachable testing commit c0d500726ce25394a7310f07e6aba54525b67be6 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: e3c7aaf03c7380cb75bab4640bce8e8c26c06b83111f529cbfd04eb30562aa11 all runs: crashed: WARNING in smsusb_term_device representative crash: WARNING in smsusb_term_device, types: [WARNING] # git bisect good c0d500726ce25394a7310f07e6aba54525b67be6 Bisecting: 0 revisions left to test after this (roughly 1 step) [e230146b86b207d7b2214c0a8cce7d4df4761806] media: videodev2.h: Fix struct v4l2_input tuner index comment determine whether the revision contains the guilty commit revision 71e60a58d7f6e4831547a760ed02409faca10f22 crashed and is reachable testing commit e230146b86b207d7b2214c0a8cce7d4df4761806 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: fae57af2a2c166d9d9274a7d58eed9a82309140852159f3b4377ce1dd5644fad all runs: crashed: WARNING in smsusb_term_device representative crash: WARNING in smsusb_term_device, types: [WARNING] # git bisect good e230146b86b207d7b2214c0a8cce7d4df4761806 8abb53c5167cfb5bb275512a3da4ec2468478626 is the first bad commit commit 8abb53c5167cfb5bb275512a3da4ec2468478626 Author: Duoming Zhou Date: Tue May 23 07:59:32 2023 +0800 media: usb: siano: Fix warning due to null work_func_t function pointer [ Upstream commit 6f489a966fbeb0da63d45c2c66a8957eab604bf6 ] The previous commit ebad8e731c1c ("media: usb: siano: Fix use after free bugs caused by do_submit_urb") adds cancel_work_sync() in smsusb_stop_streaming(). But smsusb_stop_streaming() may be called, even if the work_struct surb->wq has not been initialized. As a result, the warning will occur. One of the processes that could lead to warning is shown below: smsusb_probe() smsusb_init_device() if (!dev->in_ep || !dev->out_ep || align < 0) { smsusb_term_device(intf); smsusb_stop_streaming() cancel_work_sync(&dev->surbs[i].wq); __cancel_work_timer() __flush_work() if (WARN_ON(!work->func)) // work->func is null The log reported by syzbot is shown below: WARNING: CPU: 0 PID: 897 at kernel/workqueue.c:3066 __flush_work+0x798/0xa80 kernel/workqueue.c:3063 Modules linked in: CPU: 0 PID: 897 Comm: kworker/0:2 Not tainted 6.2.0-rc1-syzkaller #0 RIP: 0010:__flush_work+0x798/0xa80 kernel/workqueue.c:3066 ... RSP: 0018:ffffc9000464ebf8 EFLAGS: 00010246 RAX: 1ffff11002dbb420 RBX: 0000000000000021 RCX: 1ffffffff204fa4e RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffff888016dda0e8 RBP: ffffc9000464ed98 R08: 0000000000000001 R09: ffffffff90253b2f R10: 0000000000000001 R11: 0000000000000000 R12: ffff888016dda0e8 R13: ffff888016dda0e8 R14: ffff888016dda100 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffd4331efe8 CR3: 000000000b48e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __cancel_work_timer+0x315/0x460 kernel/workqueue.c:3160 smsusb_stop_streaming drivers/media/usb/siano/smsusb.c:182 [inline] smsusb_term_device+0xda/0x2d0 drivers/media/usb/siano/smsusb.c:344 smsusb_init_device+0x400/0x9ce drivers/media/usb/siano/smsusb.c:419 smsusb_probe+0xbbd/0xc55 drivers/media/usb/siano/smsusb.c:567 ... This patch adds check before cancel_work_sync(). If surb->wq has not been initialized, the cancel_work_sync() will not be executed. Reported-by: syzbot+27b0b464864741b18b99@syzkaller.appspotmail.com Fixes: ebad8e731c1c ("media: usb: siano: Fix use after free bugs caused by do_submit_urb") Signed-off-by: Duoming Zhou Signed-off-by: Hans Verkuil Signed-off-by: Sasha Levin drivers/media/usb/siano/smsusb.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) accumulated error probability: 0.00 culprit signature: 15789e3c3c55dd5f42e81083bf63e29905288d6c6ce4731895cda79c8e08b854 parent signature: fae57af2a2c166d9d9274a7d58eed9a82309140852159f3b4377ce1dd5644fad revisions tested: 20, total time: 2h48m19.89108093s (build: 1h11m59.89429564s, test: 1h29m35.075514071s) first good commit: 8abb53c5167cfb5bb275512a3da4ec2468478626 media: usb: siano: Fix warning due to null work_func_t function pointer recipients (to): ["duoming@zju.edu.cn" "hverkuil-cisco@xs4all.nl" "sashal@kernel.org"] recipients (cc): []