ci2 starts bisection 2026-01-01 07:41:38.03546167 +0000 UTC m=+3089510.212584726 bisecting fixing commit since 1c700860e8bc079c5c71d73c55e51865d273943c building syzkaller on 98683f8f094a4a5418f62711143436a99522360e ensuring issue is reproducible on original commit 1c700860e8bc079c5c71d73c55e51865d273943c testing commit 1c700860e8bc079c5c71d73c55e51865d273943c gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: e63e5a4efb421c543d6be38e5666a2cce64f31ac3a95479a30f323712a6afb65 all runs: crashed: general protection fault in bcsp_recv representative crash: general protection fault in bcsp_recv, types: [DoS] check whether we can drop unnecessary instrumentation disabling configs for [kasan locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed testing commit 1c700860e8bc079c5c71d73c55e51865d273943c gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c7953f0ff0a1c0d80807f28ab286c5e48153b651ba4d047808b63087aaa808ad all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in bcsp_recv representative crash: BUG: unable to handle kernel NULL pointer dereference in bcsp_recv, types: [NULL-POINTER-DEREFERENCE] the bug reproduces without the instrumentation disabling configs for [locking atomic_sleep hang memleak ubsan bug_or_warning kasan], they are not needed kconfig minimization: base=3707 full=7306 leaves diff=2039 split chunks (needed=false): <2039> split chunk #0 of len 2039 into 5 parts testing without sub-chunk 1/5 disabling configs for [kasan locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed testing commit 1c700860e8bc079c5c71d73c55e51865d273943c gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 8113526725917430e56272d1dab7a1415620dbac4eb9d7557731183b0785b109 all runs: OK false negative chance: 0.000 testing without sub-chunk 2/5 disabling configs for [atomic_sleep hang memleak ubsan bug_or_warning kasan locking], they are not needed testing commit 1c700860e8bc079c5c71d73c55e51865d273943c gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: f72c2ac0817cdf5186498bdf749be38cc565fcb5826ce7d3a12be4bc9f40e1d8 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in bcsp_recv representative crash: BUG: unable to handle kernel NULL pointer dereference in bcsp_recv, types: [NULL-POINTER-DEREFERENCE] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep hang], they are not needed testing commit 1c700860e8bc079c5c71d73c55e51865d273943c gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: e190f5099ec4833f548c020e9d574b064244e548245f8b2b759007dc533b7e64 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in bcsp_recv representative crash: BUG: unable to handle kernel NULL pointer dereference in bcsp_recv, types: [NULL-POINTER-DEREFERENCE] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [hang memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed testing commit 1c700860e8bc079c5c71d73c55e51865d273943c gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 525e30877f746fca3f47cd6062dc441d0a6a584019196e3eaf15300a19e8b225 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in bcsp_recv representative crash: BUG: unable to handle kernel NULL pointer dereference in bcsp_recv, types: [NULL-POINTER-DEREFERENCE] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [locking atomic_sleep hang memleak ubsan bug_or_warning kasan], they are not needed testing commit 1c700860e8bc079c5c71d73c55e51865d273943c gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 6bbf0f6e6f45b59b36d8e74023f3610e0e8bcc183e755f460510c3984e146d02 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in bcsp_recv representative crash: BUG: unable to handle kernel NULL pointer dereference in bcsp_recv, types: [NULL-POINTER-DEREFERENCE] the chunk can be dropped minimized to 408 configs; suspects: [6LOWPAN 6LOWPAN_GHC_EXT_HDR_DEST 6LOWPAN_GHC_EXT_HDR_FRAG 6LOWPAN_GHC_EXT_HDR_HOP 6LOWPAN_GHC_EXT_HDR_ROUTE 6LOWPAN_GHC_ICMPV6 6LOWPAN_GHC_UDP 6LOWPAN_NHC 6LOWPAN_NHC_DEST 6LOWPAN_NHC_FRAGMENT 6LOWPAN_NHC_HOP 6LOWPAN_NHC_IPV6 6LOWPAN_NHC_MOBILITY 6LOWPAN_NHC_ROUTING 6LOWPAN_NHC_UDP 6PACK 842_COMPRESS 842_DECOMPRESS 9P_FSCACHE 9P_FS_POSIX_ACL 9P_FS_SECURITY ACORN_PARTITION ACORN_PARTITION_ADFS ACORN_PARTITION_CUMANA ACORN_PARTITION_EESOX ACORN_PARTITION_ICS ACORN_PARTITION_POWERTEC ACORN_PARTITION_RISCIX ACPI_NFIT ACPI_PLATFORM_PROFILE ADFS_FS AFFS_FS AFS_FS AFS_FSCACHE AF_KCM AF_RXRPC AF_RXRPC_IPV6 AIX_PARTITION AMD_SFH_HID AMIGA_PARTITION ANDROID ANDROID_BINDERFS ANDROID_BINDER_IPC APPLE_MFI_FASTCHARGE AR5523 ARCH_ENABLE_MEMORY_HOTREMOVE ARCH_ENABLE_THP_MIGRATION ASHMEM ASM_MODVERSIONS ASN1_ENCODER ASYNC_CORE ASYNC_MEMCPY ASYNC_PQ ASYNC_RAID6_RECOV ASYNC_TX_DMA ASYNC_XOR ATARI_PARTITION ATA_GENERIC ATA_OVER_ETH ATH10K ATH10K_CE ATH10K_PCI ATH10K_USB ATH11K ATH6KL ATH6KL_USB ATH9K ATH9K_AHB ATH9K_BTCOEX_SUPPORT ATH9K_CHANNEL_CONTEXT ATH9K_COMMON ATH9K_COMMON_DEBUG ATH9K_COMMON_SPECTRAL ATH9K_DEBUGFS ATH9K_DYNACK ATH9K_HTC ATH9K_HTC_DEBUGFS ATH9K_HW ATH9K_PCI ATH9K_PCOEM ATH9K_RFKILL ATH_COMMON ATM ATM_BR2684 ATM_CLIP ATM_DRIVERS ATM_LANE ATM_MPOA ATM_TCP AX25 AX25_DAMA_SLAVE AX88796B_PHY BAREUDP BATMAN_ADV BATMAN_ADV_BATMAN_V BATMAN_ADV_BLA BATMAN_ADV_DAT BATMAN_ADV_MCAST BATMAN_ADV_NC BCACHE BCMA BCMA_HOST_PCI_POSSIBLE BEFS_FS BFQ_CGROUP_DEBUG BFQ_GROUP_IOSCHED BFS_FS BIG_KEYS BLK_CGROUP BLK_CGROUP_IOCOST BLK_CGROUP_IOLATENCY BLK_CGROUP_RWSTAT BLK_DEBUG_FS_ZONED BLK_DEV_BSGLIB BLK_DEV_CRYPTOLOOP BLK_DEV_INTEGRITY BLK_DEV_INTEGRITY_T10 BLK_DEV_NBD BLK_DEV_NULL_BLK BLK_DEV_NULL_BLK_FAULT_INJECTION BLK_DEV_NVME BLK_DEV_PMEM BLK_DEV_RAM BLK_DEV_RNBD BLK_DEV_RNBD_CLIENT BLK_DEV_THROTTLING BLK_DEV_ZONED BLK_INLINE_ENCRYPTION BLK_INLINE_ENCRYPTION_FALLBACK BLK_MQ_RDMA BLK_RQ_ALLOC_TIME BLK_WBT BLK_WBT_MQ BLOCK_LEGACY_AUTOLOAD BONDING BPF_EVENTS BPF_JIT BPF_JIT_ALWAYS_ON BPF_JIT_DEFAULT_ON BPF_LSM BPF_PRELOAD BPF_PRELOAD_UMD BPF_STREAM_PARSER BPF_SYSCALL BPQETHER BRIDGE BRIDGE_CFM BRIDGE_EBT_802_3 BRIDGE_EBT_AMONG BRIDGE_EBT_ARP BRIDGE_EBT_ARPREPLY BRIDGE_EBT_BROUTE BRIDGE_EBT_DNAT BRIDGE_EBT_IP BRIDGE_EBT_IP6 BRIDGE_EBT_LIMIT BRIDGE_EBT_LOG BRIDGE_EBT_MARK BRIDGE_EBT_MARK_T BRIDGE_EBT_NFLOG BRIDGE_EBT_PKTTYPE BRIDGE_EBT_REDIRECT BRIDGE_EBT_SNAT BRIDGE_EBT_STP BRIDGE_EBT_T_FILTER BRIDGE_EBT_T_NAT BRIDGE_EBT_VLAN BRIDGE_IGMP_SNOOPING BRIDGE_MRP BRIDGE_NF_EBTABLES BRIDGE_VLAN_FILTERING BSD_DISKLABEL BSD_PROCESS_ACCT_V3 BT BTRFS_ASSERT BTRFS_FS BTRFS_FS_POSIX_ACL BTRFS_FS_REF_VERIFY BTT BT_6LOWPAN BT_ATH3K BT_BCM BT_BNEP BT_BNEP_MC_FILTER BT_BNEP_PROTO_FILTER BT_BREDR BT_CMTP BT_HCIBCM203X BT_HCIBFUSB BT_HCIBPA10X BT_HCIBTUSB BT_HCIBTUSB_AUTOSUSPEND BT_HCIBTUSB_BCM BT_HCIBTUSB_MTK BT_HCIBTUSB_RTL BT_HCIUART BT_HCIUART_3WIRE BT_HCIUART_AG6XX BT_HCIUART_BCSP BT_HCIUART_H4 BT_HCIUART_LL BT_HCIUART_MRVL BT_HCIUART_QCA BT_HCIUART_SERDEV BT_HCIVHCI BT_HIDP BT_HS BT_INTEL BT_LE BT_LEDS BT_MSFTEXT BT_QCA BT_RFCOMM BT_RFCOMM_TTY BT_RTL CACHEFILES CAIF CAIF_DEBUG CAIF_DRIVERS CAIF_NETDEV CAIF_TTY CAIF_USB CAIF_VIRTIO CAN CAN_8DEV_USB CAN_BCM CAN_CALC_BITTIMING CAN_DEV CAN_EMS_USB CAN_ESD_USB2 CAN_ETAS_ES58X CAN_GS_USB CAN_GW CAN_IFI_CANFD CAN_ISOTP CAN_J1939 CAN_KVASER_USB CAN_MCBA_USB CAN_PEAK_USB CAN_RAW CAN_SLCAN CAN_UCAN CAN_VCAN CAN_VXCAN CAPI_TRACE CARL9170 CARL9170_HWRNG CARL9170_LEDS CARL9170_WPC CEC_CORE CEPH_FS CEPH_FSCACHE CEPH_FS_POSIX_ACL CEPH_LIB CEPH_LIB_USE_DNS_RESOLVER CFG80211 CFG80211_CRDA_SUPPORT CFG80211_DEBUGFS CFG80211_DEFAULT_PS CFG80211_REQUIRE_SIGNED_REGDB CFG80211_USE_KERNEL_REGDB_KEYS CFG80211_WEXT CFS_BANDWIDTH CGROUP_BPF CGROUP_DEVICE CGROUP_HUGETLB CGROUP_NET_CLASSID CGROUP_NET_PRIO CGROUP_PERF CGROUP_RDMA CGROUP_WRITEBACK CHARGER_ISP1704 CHR_DEV_ST CIFS CIFS_ALLOW_INSECURE_LEGACY CIFS_DEBUG CIFS_DFS_UPCALL CIFS_FSCACHE CIFS_POSIX CIFS_SMB_DIRECT CIFS_SWN_UPCALL CIFS_UPCALL CIFS_XATTR CLS_U32_MARK CLS_U32_PERF CMA CMA_SIZE_SEL_MBYTES CMDLINE_PARTITION COMEDI COMEDI_DT9812 COMEDI_NI_USB6501 COMEDI_USBDUX COMEDI_USBDUXFAST COMEDI_USBDUXSIGMA COMEDI_USB_DRIVERS COMEDI_VMK80XX COMPAT_NETLINK_MESSAGES COUNTER CRAMFS CRAMFS_BLOCKDEV CRAMFS_MTD CRC4 CRC64 CRC7 CRC8 CRC_ITU_T CRC_T10DIF CRYPTO_ADIANTUM CRYPTO_AEGIS128 CRYPTO_AEGIS128_AESNI_SSE2 CRYPTO_AES_NI_INTEL CRYPTO_AES_TI CRYPTO_ANSI_CPRNG CRYPTO_ANUBIS CRYPTO_ARC4 CRYPTO_ARCH_HAVE_LIB_BLAKE2S CRYPTO_ARCH_HAVE_LIB_CHACHA CRYPTO_ARCH_HAVE_LIB_CURVE25519 CRYPTO_ARCH_HAVE_LIB_POLY1305 CRYPTO_BLAKE2B CRYPTO_BLAKE2S_X86 CRYPTO_BLOWFISH CRYPTO_BLOWFISH_COMMON CRYPTO_BLOWFISH_X86_64 CRYPTO_CAMELLIA CRYPTO_CAMELLIA_AESNI_AVX2_X86_64 CRYPTO_CAMELLIA_AESNI_AVX_X86_64 CRYPTO_CAMELLIA_X86_64 CRYPTO_CAST5 CRYPTO_CAST5_AVX_X86_64 CRYPTO_CAST6 CRYPTO_CAST6_AVX_X86_64 CRYPTO_CAST_COMMON CRYPTO_CHACHA20 CRYPTO_CHACHA20POLY1305 CRYPTO_CHACHA20_X86_64 CRYPTO_CRC32 CRYPTO_CRC32C_INTEL CRYPTO_CRC32_PCLMUL CRYPTO_CRCT10DIF CRYPTO_CRCT10DIF_PCLMUL CRYPTO_CRYPTD CRYPTO_CTS CRYPTO_CURVE25519 CRYPTO_CURVE25519_X86 CRYPTO_DEFLATE CRYPTO_DES CRYPTO_DES3_EDE_X86_64 CRYPTO_DEV_CCP CRYPTO_DEV_CCP_DD CRYPTO_DEV_PADLOCK CRYPTO_DEV_PADLOCK_AES CRYPTO_DEV_PADLOCK_SHA CRYPTO_DEV_QAT CRYPTO_DEV_QAT_C3XXX CRYPTO_DEV_QAT_C3XXXVF CRYPTO_DEV_QAT_C62X CRYPTO_DEV_QAT_C62XVF CRYPTO_DEV_QAT_DH895xCC CRYPTO_DEV_QAT_DH895xCCVF CRYPTO_DEV_VIRTIO CRYPTO_DH CRYPTO_DRBG_CTR CRYPTO_DRBG_HASH CRYPTO_ECB CRYPTO_ECC CRYPTO_ECDH CRYPTO_ECRDSA CRYPTO_ENGINE CRYPTO_ESSIV CRYPTO_FCRYPT CRYPTO_GHASH_CLMUL_NI_INTEL CRYPTO_KEYWRAP CRYPTO_KHAZAD CRYPTO_KPP CRYPTO_LIB_ARC4 CRYPTO_LIB_CHACHA CRYPTO_LIB_CHACHA20POLY1305 CRYPTO_LIB_CHACHA_GENERIC CRYPTO_LIB_CURVE25519 CRYPTO_LIB_CURVE25519_GENERIC CRYPTO_LIB_DES CRYPTO_LIB_POLY1305 CRYPTO_LIB_POLY1305_GENERIC CRYPTO_LIB_SM4 CRYPTO_LRW CRYPTO_MICHAEL_MIC CRYPTO_NHPOLY1305 CRYPTO_NHPOLY1305_AVX2 CRYPTO_NHPOLY1305_SSE2 CRYPTO_PCBC CRYPTO_PCRYPT CRYPTO_POLY1305 CRYPTO_POLY1305_X86_64 CRYPTO_RMD160 CRYPTO_SEED CRYPTO_SERPENT CRYPTO_SERPENT_AVX2_X86_64 CRYPTO_SERPENT_AVX_X86_64 CRYPTO_SERPENT_SSE2_X86_64 CRYPTO_SHA1_SSSE3 CRYPTO_SHA256_SSSE3 CRYPTO_SHA3 CRYPTO_SHA512_SSSE3 CRYPTO_SIMD CRYPTO_SM2 CRYPTO_SM3 CRYPTO_SM4 CRYPTO_STREEBOG CRYPTO_TEA CRYPTO_TWOFISH CRYPTO_TWOFISH_AVX_X86_64 CRYPTO_TWOFISH_COMMON CRYPTO_TWOFISH_X86_64 CRYPTO_TWOFISH_X86_64_3WAY CRYPTO_USER CRYPTO_USER_API CRYPTO_USER_API_AEAD CRYPTO_USER_API_ENABLE_OBSOLETE CRYPTO_USER_API_HASH CRYPTO_USER_API_RNG CRYPTO_USER_API_SKCIPHER CRYPTO_VMAC CRYPTO_WP512 CRYPTO_XCBC CRYPTO_XTS CRYPTO_XXHASH CUSE CYPRESS_FIRMWARE DAMON DAMON_DBGFS DAMON_VADDR DAX DCA DCB DEBUG_PREEMPT DEFAULT_PFIFO_FAST DEVICE_PRIVATE DEV_COREDUMP DEV_DAX DEV_PAGEMAP_OPS DIMLIB DLN2_ADC DMABUF_HEAPS DMABUF_HEAPS_CMA DMABUF_HEAPS_SYSTEM DMABUF_MOVE_NOTIFY DMA_CMA DMA_ENGINE_RAID DM_BIO_PRISON DM_BUFIO DM_CACHE DM_CACHE_SMQ DM_CLONE DM_CRYPT DM_FLAKEY DM_INTEGRITY DM_MULTIPATH DM_MULTIPATH_QL DM_MULTIPATH_ST DM_PERSISTENT_DATA DM_RAID DM_SNAPSHOT DM_THIN_PROVISIONING DM_UEVENT DM_VERITY DM_VERITY_FEC DM_WRITECACHE DM_ZONED DRAGONRISE_FF DRM DRM_BOCHS DRM_BRIDGE DRM_CIRRUS_QEMU DRM_DEBUG_MM DRM_DP_AUX_CHARDEV DRM_GEM_SHMEM_HELPER DRM_GM12U320 DRM_GUD DRM_I915 DRM_I915_CAPTURE_ERROR DRM_I915_COMPRESS_ERROR DRM_I915_USERPTR DRM_KMS_HELPER DRM_MIPI_DSI DRM_PANEL DRM_PANEL_BRIDGE DRM_PANEL_ORIENTATION_QUIRKS DRM_SIMPLEDRM DRM_TTM DRM_TTM_HELPER ENCRYPTED_KEYS FSCACHE FUSE_FS HAMRADIO HID_DRAGONRISE IIO INFINIBAND INFINIBAND_ADDR_TRANS INFINIBAND_RTRS_CLIENT IOSCHED_BFQ ISDN ISDN_CAPI LIBNVDIMM MAC80211 MAC80211_LEDS MEDIA_SUPPORT MEMORY_HOTPLUG MEMORY_HOTREMOVE MFD_DLN2 MTD NET_CLS_U32 NET_SCH_DEFAULT PARTITION_ADVANCED PREEMPTION RFKILL SERIAL_DEV_BUS STAGING TCG_TPM TLS TLS_DEVICE TRANSPARENT_HUGEPAGE TRUSTED_KEYS USB_GADGET USB_PHY VLAN_8021Q WANT_COMPAT_NETLINK_MESSAGES WEXT_CORE WIRELESS WIRELESS_EXT WLAN WLAN_VENDOR_ATH ZONE_DEVICE] disabling configs for [atomic_sleep hang memleak ubsan bug_or_warning kasan locking], they are not needed testing current HEAD 68efe5a6c16a05391e3d96025b41e9bf573f968c testing commit 68efe5a6c16a05391e3d96025b41e9bf573f968c gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: db40701670768bb1a4bb6221714ea8c269f2bcc1c7ce521d9d28233b8fe0de29 all runs: OK false negative chance: 0.000 # git bisect start 68efe5a6c16a05391e3d96025b41e9bf573f968c 1c700860e8bc079c5c71d73c55e51865d273943c Bisecting: 1160 revisions left to test after this (roughly 10 steps) [ae8428d6825276c9895194f7013a1db3aa9322d0] usb: hub: Don't try to recover devices lost during warm reset. determine whether the revision contains the guilty commit revision 1c700860e8bc079c5c71d73c55e51865d273943c crashed and is reachable testing commit ae8428d6825276c9895194f7013a1db3aa9322d0 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 8c93bc945e05a22fcbe9ba595313e82c7243108866072f2b9f7e5d5277fbc101 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in bcsp_recv representative crash: BUG: unable to handle kernel NULL pointer dereference in bcsp_recv, types: [NULL-POINTER-DEREFERENCE] # git bisect good ae8428d6825276c9895194f7013a1db3aa9322d0 Bisecting: 580 revisions left to test after this (roughly 9 steps) [c19b29291f21cc79e8506f2737a5f768fd914f1a] memory: samsung: exynos-srom: Fix of_iomap leak in exynos_srom_probe determine whether the revision contains the guilty commit revision 1c700860e8bc079c5c71d73c55e51865d273943c crashed and is reachable testing commit c19b29291f21cc79e8506f2737a5f768fd914f1a gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a58202ca2e5c9ffe303f55ca6ce544db3cde277dc177093c64769500a9e7c623 run #0: crashed: BUG: unable to handle kernel NULL pointer dereference in bcsp_recv run #1: crashed: BUG: unable to handle kernel NULL pointer dereference in bcsp_recv run #2: crashed: BUG: unable to handle kernel NULL pointer dereference in bcsp_recv run #3: crashed: BUG: unable to handle kernel NULL pointer dereference in bcsp_recv run #4: crashed: BUG: unable to handle kernel NULL pointer dereference in bcsp_recv run #5: crashed: BUG: unable to handle kernel NULL pointer dereference in bcsp_recv run #6: crashed: BUG: unable to handle kernel NULL pointer dereference in bcsp_recv run #7: crashed: BUG: unable to handle kernel NULL pointer dereference in bcsp_recv run #8: crashed: BUG: unable to handle kernel NULL pointer dereference in bcsp_recv run #9: OK representative crash: BUG: unable to handle kernel NULL pointer dereference in bcsp_recv, types: [NULL-POINTER-DEREFERENCE] # git bisect good c19b29291f21cc79e8506f2737a5f768fd914f1a Bisecting: 290 revisions left to test after this (roughly 8 steps) [965813f1afaf6ab66090acb8a4c40d966ecdac31] media: pci: ivtv: Don't create fake v4l2_fh determine whether the revision contains the guilty commit revision ae8428d6825276c9895194f7013a1db3aa9322d0 crashed and is reachable testing commit 965813f1afaf6ab66090acb8a4c40d966ecdac31 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 820e6e9bb1a994f8ac76b01c7b8c04ae5206c080cb218d6a76194891e1f8d9de all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in bcsp_recv representative crash: BUG: unable to handle kernel NULL pointer dereference in bcsp_recv, types: [NULL-POINTER-DEREFERENCE] # git bisect good 965813f1afaf6ab66090acb8a4c40d966ecdac31 Bisecting: 145 revisions left to test after this (roughly 7 steps) [1040834078acadd06667a2f5f3c04eaacaeac744] net: mdio: fix resource leak in mdiobus_register_device() determine whether the revision contains the guilty commit revision 1c700860e8bc079c5c71d73c55e51865d273943c crashed and is reachable testing commit 1040834078acadd06667a2f5f3c04eaacaeac744 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 18b834a72cb8b5b32938465aac042dcba6a85fd18d5da07184d77e44c26ce397 all runs: OK false negative chance: 0.000 # git bisect bad 1040834078acadd06667a2f5f3c04eaacaeac744 Bisecting: 72 revisions left to test after this (roughly 6 steps) [eb3d29ca0820fa3d7cccad47d2da56c9ab5469ed] PCI: cadence: Check for the existence of cdns_pcie::ops before using it determine whether the revision contains the guilty commit revision c19b29291f21cc79e8506f2737a5f768fd914f1a crashed and is reachable testing commit eb3d29ca0820fa3d7cccad47d2da56c9ab5469ed gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: ee5b37243a6345a8ba80fcb11cfb6857bb2e36eb7d560cb48f32df4d8150f241 run #0: crashed: BUG: unable to handle kernel NULL pointer dereference in bcsp_recv run #1: crashed: BUG: unable to handle kernel NULL pointer dereference in bcsp_recv run #2: crashed: BUG: unable to handle kernel NULL pointer dereference in bcsp_recv run #3: crashed: BUG: unable to handle kernel NULL pointer dereference in bcsp_recv run #4: crashed: BUG: unable to handle kernel NULL pointer dereference in bcsp_recv run #5: crashed: BUG: unable to handle kernel NULL pointer dereference in bcsp_recv run #6: crashed: BUG: unable to handle kernel NULL pointer dereference in bcsp_recv run #7: OK run #8: OK run #9: OK representative crash: BUG: unable to handle kernel NULL pointer dereference in bcsp_recv, types: [NULL-POINTER-DEREFERENCE] # git bisect good eb3d29ca0820fa3d7cccad47d2da56c9ab5469ed Bisecting: 36 revisions left to test after this (roughly 5 steps) [f8d974a0e8c2928cea8fcda601f7f2d834ac1344] riscv: ptdump: use seq_puts() in pt_dump_seq_puts() macro determine whether the revision contains the guilty commit revision c19b29291f21cc79e8506f2737a5f768fd914f1a crashed and is reachable testing commit f8d974a0e8c2928cea8fcda601f7f2d834ac1344 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: eb48f4341011d47ec79c0e156bca81d50bc13ad74ebfea5b3587ca1350e0e209 all runs: OK false negative chance: 0.000 # git bisect bad f8d974a0e8c2928cea8fcda601f7f2d834ac1344 Bisecting: 17 revisions left to test after this (roughly 4 steps) [63bb04cda17311bd25de7fd2faf3618f64c80fee] RDMA/irdma: Set irdma_cq cq_num field during CQ create determine whether the revision contains the guilty commit revision c19b29291f21cc79e8506f2737a5f768fd914f1a crashed and is reachable testing commit 63bb04cda17311bd25de7fd2faf3618f64c80fee gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 299c63dba0653c9df6ed125dabb5109a97813b28532bb7c35b6e87c50c5a1483 all runs: OK false negative chance: 0.000 # git bisect bad 63bb04cda17311bd25de7fd2faf3618f64c80fee Bisecting: 8 revisions left to test after this (roughly 3 steps) [d2850f037c2ae75882d68ae654d546ff5c0f678c] Bluetooth: SCO: Fix UAF on sco_conn_free determine whether the revision contains the guilty commit revision 1c700860e8bc079c5c71d73c55e51865d273943c crashed and is reachable testing commit d2850f037c2ae75882d68ae654d546ff5c0f678c gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: bf14a55bbfa5179bcac6b8ee434266cad0dba99c562551549ac6885391ce0956 run #0: crashed: BUG: unable to handle kernel NULL pointer dereference in bcsp_recv run #1: crashed: BUG: unable to handle kernel NULL pointer dereference in bcsp_recv run #2: crashed: BUG: unable to handle kernel NULL pointer dereference in bcsp_recv run #3: crashed: BUG: unable to handle kernel NULL pointer dereference in bcsp_recv run #4: crashed: BUG: unable to handle kernel NULL pointer dereference in bcsp_recv run #5: crashed: BUG: unable to handle kernel NULL pointer dereference in bcsp_recv run #6: crashed: BUG: unable to handle kernel NULL pointer dereference in bcsp_recv run #7: crashed: BUG: unable to handle kernel NULL pointer dereference in bcsp_recv run #8: crashed: BUG: unable to handle kernel NULL pointer dereference in bcsp_recv run #9: OK representative crash: BUG: unable to handle kernel NULL pointer dereference in bcsp_recv, types: [NULL-POINTER-DEREFERENCE] # git bisect good d2850f037c2ae75882d68ae654d546ff5c0f678c Bisecting: 4 revisions left to test after this (roughly 2 steps) [c12ebeacfbaec491e683023dd46336f3fb021584] page_pool: Clamp pool size to max 16K pages determine whether the revision contains the guilty commit revision 1c700860e8bc079c5c71d73c55e51865d273943c crashed and is reachable testing commit c12ebeacfbaec491e683023dd46336f3fb021584 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7e91d01aff2170f99a218ce7f3eed1f2a66043739c6860864ccd1cd2c070382b all runs: OK false negative chance: 0.000 # git bisect bad c12ebeacfbaec491e683023dd46336f3fb021584 Bisecting: 1 revision left to test after this (roughly 1 step) [c70926971b36b871abfe40e695d5b4966b62ef6f] ALSA: usb-audio: add mono main switch to Presonus S1824c determine whether the revision contains the guilty commit revision ae8428d6825276c9895194f7013a1db3aa9322d0 crashed and is reachable testing commit c70926971b36b871abfe40e695d5b4966b62ef6f gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7e91d01aff2170f99a218ce7f3eed1f2a66043739c6860864ccd1cd2c070382b all runs: OK false negative chance: 0.000 # git bisect bad c70926971b36b871abfe40e695d5b4966b62ef6f Bisecting: 0 revisions left to test after this (roughly 0 steps) [b65ca9708bfbf47d8b7bd44b7c574bd16798e9c9] Bluetooth: bcsp: receive data only if registered determine whether the revision contains the guilty commit revision eb3d29ca0820fa3d7cccad47d2da56c9ab5469ed crashed and is reachable testing commit b65ca9708bfbf47d8b7bd44b7c574bd16798e9c9 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7e91d01aff2170f99a218ce7f3eed1f2a66043739c6860864ccd1cd2c070382b all runs: OK false negative chance: 0.000 # git bisect bad b65ca9708bfbf47d8b7bd44b7c574bd16798e9c9 b65ca9708bfbf47d8b7bd44b7c574bd16798e9c9 is the first bad commit commit b65ca9708bfbf47d8b7bd44b7c574bd16798e9c9 Author: Ivan Pravdin Date: Sat Aug 30 16:03:40 2025 -0400 Bluetooth: bcsp: receive data only if registered [ Upstream commit ca94b2b036c22556c3a66f1b80f490882deef7a6 ] Currently, bcsp_recv() can be called even when the BCSP protocol has not been registered. This leads to a NULL pointer dereference, as shown in the following stack trace: KASAN: null-ptr-deref in range [0x0000000000000108-0x000000000000010f] RIP: 0010:bcsp_recv+0x13d/0x1740 drivers/bluetooth/hci_bcsp.c:590 Call Trace: hci_uart_tty_receive+0x194/0x220 drivers/bluetooth/hci_ldisc.c:627 tiocsti+0x23c/0x2c0 drivers/tty/tty_io.c:2290 tty_ioctl+0x626/0xde0 drivers/tty/tty_io.c:2706 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f To prevent this, ensure that the HCI_UART_REGISTERED flag is set before processing received data. If the protocol is not registered, return -EUNATCH. Reported-by: syzbot+4ed6852d4da4606c93da@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=4ed6852d4da4606c93da Tested-by: syzbot+4ed6852d4da4606c93da@syzkaller.appspotmail.com Signed-off-by: Ivan Pravdin Signed-off-by: Luiz Augusto von Dentz Signed-off-by: Sasha Levin drivers/bluetooth/hci_bcsp.c | 3 +++ 1 file changed, 3 insertions(+) accumulated error probability: 0.00 culprit signature: 7e91d01aff2170f99a218ce7f3eed1f2a66043739c6860864ccd1cd2c070382b parent signature: bf14a55bbfa5179bcac6b8ee434266cad0dba99c562551549ac6885391ce0956 revisions tested: 19, total time: 5h27m37.908376066s (build: 1h7m20.610872769s, test: 4h15m19.202151977s) first good commit: b65ca9708bfbf47d8b7bd44b7c574bd16798e9c9 Bluetooth: bcsp: receive data only if registered recipients (to): ["ipravdin.official@gmail.com" "luiz.von.dentz@intel.com" "sashal@kernel.org" "syzbot+4ed6852d4da4606c93da@syzkaller.appspotmail.com"] recipients (cc): []