ci2 starts bisection 2025-08-27 09:55:50.353017499 +0000 UTC m=+66325.186132861 bisecting fixing commit since 59a2de10b81ae4765d73142acde15106028b1571 building syzkaller on 3cda49cfaa8556b73277ccd7e75952f0f2de2d74 ensuring issue is reproducible on original commit 59a2de10b81ae4765d73142acde15106028b1571 testing commit 59a2de10b81ae4765d73142acde15106028b1571 gcc compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7 kernel signature: 9fc50271691e729fd454051b10513aa4d5c17b0edd9cd2dc10fece96ed682d01 all runs: crashed: WARNING in comedi_unlocked_ioctl representative crash: WARNING in comedi_unlocked_ioctl, types: [WARNING] check whether we can drop unnecessary instrumentation disabling configs for [ubsan kasan locking atomic_sleep hang memleak], they are not needed testing commit 59a2de10b81ae4765d73142acde15106028b1571 gcc compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7 kernel signature: 26f783a8fc9378da945580de6a4dc62de40351c787ac85c452b30e6446d7b4e4 all runs: crashed: WARNING in comedi_unlocked_ioctl representative crash: WARNING in comedi_unlocked_ioctl, types: [WARNING] the bug reproduces without the instrumentation disabling configs for [ubsan kasan locking atomic_sleep hang memleak], they are not needed kconfig minimization: base=3913 full=7801 leaves diff=2161 split chunks (needed=false): <2161> split chunk #0 of len 2161 into 5 parts testing without sub-chunk 1/5 disabling configs for [locking atomic_sleep hang memleak ubsan kasan], they are not needed testing commit 59a2de10b81ae4765d73142acde15106028b1571 gcc compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7 kernel signature: aad050a5b515adec11b4f581723c6ba82e7737a847b794c2ca00361158102023 all runs: OK false negative chance: 0.000 testing without sub-chunk 2/5 disabling configs for [kasan locking atomic_sleep hang memleak ubsan], they are not needed testing commit 59a2de10b81ae4765d73142acde15106028b1571 gcc compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7 kernel signature: 4fdb6b7140f3514040f517f30f41748a9c5a9864cd5b9c3c134a32fa72db2d1b all runs: crashed: WARNING in comedi_unlocked_ioctl representative crash: WARNING in comedi_unlocked_ioctl, types: [WARNING] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [atomic_sleep hang memleak ubsan kasan locking], they are not needed testing commit 59a2de10b81ae4765d73142acde15106028b1571 gcc compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7 kernel signature: e7aa3391602b44a1f8f6eac67872e691cd09ef6f2a64e1258c74a8567efd4ec5 all runs: crashed: WARNING in comedi_unlocked_ioctl representative crash: WARNING in comedi_unlocked_ioctl, types: [WARNING] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [hang memleak ubsan kasan locking atomic_sleep], they are not needed testing commit 59a2de10b81ae4765d73142acde15106028b1571 gcc compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7 kernel signature: 7b38a4962127322f74e071ccf686635117cda6d1a85ccae3e19c14fb3da43597 all runs: crashed: WARNING in comedi_unlocked_ioctl representative crash: WARNING in comedi_unlocked_ioctl, types: [WARNING] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [locking atomic_sleep hang memleak ubsan kasan], they are not needed testing commit 59a2de10b81ae4765d73142acde15106028b1571 gcc compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7 kernel signature: 7d86b6c02a075f71a7b7b804b89305bd66c4ec5641199e3ab4da10436469d6af all runs: crashed: WARNING in comedi_unlocked_ioctl representative crash: WARNING in comedi_unlocked_ioctl, types: [WARNING] the chunk can be dropped minimized to 433 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_BINDERFS ANDROID_BINDER_IPC ANON_VMA_NAME APERTURE_HELPERS APPLE_MFI_FASTCHARGE AR5523 ARCH_ENABLE_MEMORY_HOTREMOVE ARCH_ENABLE_THP_MIGRATION ARCH_WANT_PMD_MKWRITE ASM_MODVERSIONS ASUS_TF103C_DOCK 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 AUXILIARY_BUS 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_PUNT_BIO BLK_CGROUP_RWSTAT BLK_DEBUG_FS_ZONED BLK_DEV_BSGLIB 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_ICQ BLK_INLINE_ENCRYPTION BLK_INLINE_ENCRYPTION_FALLBACK BLK_WBT BLK_WBT_MQ BONDING BOOT_VESA_SUPPORT 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_POLL_SYNC 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_INTEL BT_LE BT_LEDS BT_LE_L2CAP_ECRED BT_MSFTEXT BT_MTK 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_USB CAN_ETAS_ES58X CAN_F81604 CAN_GS_USB CAN_GW CAN_IFI_CANFD CAN_ISOTP CAN_J1939 CAN_KVASER_USB CAN_MCBA_USB CAN_NETLINK CAN_PEAK_USB CAN_RAW CAN_RX_OFFLOAD 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 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_8254 COMEDI_8255 COMEDI_8255_PCI COMEDI_8255_SA COMEDI_ADL_PCI9118 COMEDI_ADQ12B COMEDI_AIO_AIO12_8 COMEDI_AIO_IIRO_16 COMEDI_AMPLC_DIO200 COMEDI_AMPLC_DIO200_ISA COMEDI_AMPLC_PC236 COMEDI_AMPLC_PC236_ISA COMEDI_AMPLC_PC263_ISA COMEDI_BOND COMEDI_C6XDIGIO COMEDI_DAC02 COMEDI_DAS08 COMEDI_DAS08_ISA COMEDI_DAS16M1 COMEDI_DAS1800 COMEDI_DAS6402 COMEDI_DAS800 COMEDI_DMM32AT COMEDI_DT2801 COMEDI_DT2811 COMEDI_DT2814 COMEDI_DT2815 COMEDI_DT2817 COMEDI_DT282X COMEDI_DT9812 COMEDI_FL512 COMEDI_ISADMA COMEDI_ISA_DRIVERS COMEDI_KCOMEDILIB COMEDI_MISC_DRIVERS COMEDI_MPC624 COMEDI_MULTIQ3 COMEDI_NI_ATMIO16D COMEDI_NI_AT_A2150 COMEDI_NI_AT_AO COMEDI_NI_DAQ_700_CS COMEDI_NI_LABPC COMEDI_NI_LABPC_CS COMEDI_NI_LABPC_ISA COMEDI_NI_LABPC_ISADMA COMEDI_NI_LABPC_PCI COMEDI_NI_USB6501 COMEDI_PARPORT COMEDI_PCI_DRIVERS COMEDI_PCL711 COMEDI_PCL724 COMEDI_PCL726 COMEDI_PCL730 COMEDI_PCL812 COMEDI_PCL816 COMEDI_PCL818 COMEDI_PCM3724 COMEDI_PCMAD COMEDI_PCMCIA_DRIVERS COMEDI_PCMDA12 COMEDI_PCMMIO COMEDI_PCMUIO COMEDI_RTI800 COMEDI_RTI802 COMEDI_S526 COMEDI_TEST COMEDI_USBDUX COMEDI_USBDUXFAST COMEDI_USBDUXSIGMA COMEDI_USB_DRIVERS COMEDI_VMK80XX COMPAT_NETLINK_MESSAGES COUNTER CRAMFS CRAMFS_BLOCKDEV CRAMFS_MTD CRC4 CRC64 CRC64_ROCKSOFT 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_ARIA CRYPTO_ARIA_AESNI_AVX_X86_64 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_CRC64_ROCKSOFT 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_HCTR2 CRYPTO_KDF800108_CTR 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_LRW CRYPTO_MICHAEL_MIC CRYPTO_NHPOLY1305 CRYPTO_NHPOLY1305_AVX2 CRYPTO_NHPOLY1305_SSE2 CRYPTO_PCBC CRYPTO_PCRYPT CRYPTO_POLY1305 CRYPTO_POLY1305_X86_64 CRYPTO_POLYVAL CRYPTO_POLYVAL_CLMUL_NI 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_SHA512_SSSE3 CRYPTO_SIMD CRYPTO_SM2 CRYPTO_SM3 CRYPTO_SM3_AVX_X86_64 CRYPTO_SM4 CRYPTO_SM4_AESNI_AVX2_X86_64 CRYPTO_SM4_AESNI_AVX_X86_64 CRYPTO_SM4_GENERIC 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_XCTR CRYPTO_XTS CRYPTO_XXHASH CUSE CYPRESS_FIRMWARE DAMON DAMON_DBGFS DAMON_PADDR DAMON_RECLAIM DAMON_VADDR DAX DCA DCB DEFAULT_PFIFO_FAST DEVICE_MIGRATION DEVICE_PRIVATE DEV_COREDUMP DEV_DAX DIMLIB DMA_CMA FSCACHE FUSE_FS GPIOLIB HAMRADIO INFINIBAND INFINIBAND_ADDR_TRANS INFINIBAND_RTRS_CLIENT IOSCHED_BFQ ISDN ISDN_CAPI LIBNVDIMM MAC80211 MAC80211_LEDS MEDIA_SUPPORT MEMORY_HOTPLUG MEMORY_HOTREMOVE MTD NET_CLS_U32 NET_SCH_DEFAULT PARTITION_ADVANCED PCCARD PCMCIA RFKILL SERIAL_DEV_BUS TLS TLS_DEVICE TRANSPARENT_HUGEPAGE USB_GADGET USB_PHY VLAN_8021Q WANT_COMPAT_NETLINK_MESSAGES WEXT_CORE WIRELESS WIRELESS_EXT WLAN WLAN_VENDOR_ATH ZONE_DEVICE] disabling configs for [memleak ubsan kasan locking atomic_sleep hang], they are not needed testing current HEAD bb9c90ab9c5a1a933a0dfd302a3fde73642b2b06 testing commit bb9c90ab9c5a1a933a0dfd302a3fde73642b2b06 gcc compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7 kernel signature: 675d066196cf72462c17be1226d4718a14ec3dc0b95aa502ab90f5c4831abe85 all runs: OK false negative chance: 0.000 # git bisect start bb9c90ab9c5a1a933a0dfd302a3fde73642b2b06 59a2de10b81ae4765d73142acde15106028b1571 Bisecting: 282 revisions left to test after this (roughly 8 steps) [c383033b0ac874b24a22125f2f1840b299510674] ALSA: hda: Add missing NVIDIA HDA codec IDs determine whether the revision contains the guilty commit revision 59a2de10b81ae4765d73142acde15106028b1571 crashed and is reachable testing commit c383033b0ac874b24a22125f2f1840b299510674 gcc compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7 kernel signature: ec4e6560bc8f3ad5795319c934d926177b11d40cbdaa595f96c392ce17b3b373 all runs: OK false negative chance: 0.000 # git bisect bad c383033b0ac874b24a22125f2f1840b299510674 Bisecting: 141 revisions left to test after this (roughly 7 steps) [33eba752d9de7ba2ebf54648adfae6c38f62600c] net/mlx5: Update the list of the PCI supported devices determine whether the revision contains the guilty commit revision 59a2de10b81ae4765d73142acde15106028b1571 crashed and is reachable testing commit 33eba752d9de7ba2ebf54648adfae6c38f62600c gcc compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7 kernel signature: 2576c3eb9afa4fe381d9152687e24bd3820e57115aa5007690fe348f7c9f2dc0 all runs: crashed: WARNING in comedi_unlocked_ioctl representative crash: WARNING in comedi_unlocked_ioctl, types: [WARNING] # git bisect good 33eba752d9de7ba2ebf54648adfae6c38f62600c Bisecting: 70 revisions left to test after this (roughly 6 steps) [71f5c98d2931eea3f1b4d6c4771215b8448f5d2b] usb: hub: Fix flushing and scheduling of delayed work that tunes runtime pm determine whether the revision contains the guilty commit revision 59a2de10b81ae4765d73142acde15106028b1571 crashed and is reachable testing commit 71f5c98d2931eea3f1b4d6c4771215b8448f5d2b gcc compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7 kernel signature: 0a67e1e58bf39641497c4e09a02cdfe34da4c2e4f9a5e9a6786dd0859c733deb all runs: OK false negative chance: 0.000 # git bisect bad 71f5c98d2931eea3f1b4d6c4771215b8448f5d2b Bisecting: 35 revisions left to test after this (roughly 5 steps) [bc016b7842f65cc7fab76fb6326f5109b2e1bb38] cachefiles: Fix the incorrect return value in __cachefiles_write() determine whether the revision contains the guilty commit revision 59a2de10b81ae4765d73142acde15106028b1571 crashed and is reachable testing commit bc016b7842f65cc7fab76fb6326f5109b2e1bb38 gcc compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7 kernel signature: c5acb26c4afbf7ded409ff18a6b583091fca9d0d353151b5b8a08c8b2cf6ec48 all runs: OK false negative chance: 0.000 # git bisect bad bc016b7842f65cc7fab76fb6326f5109b2e1bb38 Bisecting: 17 revisions left to test after this (roughly 4 steps) [15a0a5de49507062bc3be4014a403d8cea5533de] smb: client: fix use-after-free in crypt_message when using async crypto determine whether the revision contains the guilty commit revision 59a2de10b81ae4765d73142acde15106028b1571 crashed and is reachable testing commit 15a0a5de49507062bc3be4014a403d8cea5533de gcc compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7 kernel signature: 025a5022de1c5aa68f554a67a8c97925580bd8fabc238fda28b12abbc05426cb all runs: crashed: WARNING in comedi_unlocked_ioctl representative crash: WARNING in comedi_unlocked_ioctl, types: [WARNING] # git bisect good 15a0a5de49507062bc3be4014a403d8cea5533de Bisecting: 8 revisions left to test after this (roughly 3 steps) [adb7df8a8f9d788423e161b779764527dd3ec2d0] comedi: das16m1: Fix bit shift out of bounds determine whether the revision contains the guilty commit revision 33eba752d9de7ba2ebf54648adfae6c38f62600c crashed and is reachable testing commit adb7df8a8f9d788423e161b779764527dd3ec2d0 gcc compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7 kernel signature: 87991cb28456a8e5ff822f17318ac4a375e8203f51294e7f262f7a1a3c509bf5 all runs: crashed: WARNING in comedi_unlocked_ioctl representative crash: WARNING in comedi_unlocked_ioctl, types: [WARNING] # git bisect good adb7df8a8f9d788423e161b779764527dd3ec2d0 Bisecting: 4 revisions left to test after this (roughly 2 steps) [10f9024a8c824a41827fff1fefefb314c98e2c88] comedi: Fix use of uninitialized data in insn_rw_emulate_bits() determine whether the revision contains the guilty commit revision 15a0a5de49507062bc3be4014a403d8cea5533de crashed and is reachable testing commit 10f9024a8c824a41827fff1fefefb314c98e2c88 gcc compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7 kernel signature: ca7b75ad3238dbe7b0a7c8ddd338c3914edac86bf35d54d4a39f248c2c5fda79 all runs: OK false negative chance: 0.000 # git bisect bad 10f9024a8c824a41827fff1fefefb314c98e2c88 Bisecting: 1 revision left to test after this (roughly 1 step) [c9d3d9667443caafa804cd07940aeaef8e53aa90] comedi: Fail COMEDI_INSNLIST ioctl if n_insns is too large determine whether the revision contains the guilty commit revision 33eba752d9de7ba2ebf54648adfae6c38f62600c crashed and is reachable testing commit c9d3d9667443caafa804cd07940aeaef8e53aa90 gcc compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7 kernel signature: 6e9194939d50e474f10e4572003575761b7a9efb53793e4bf7ff5c9d91d7410c all runs: OK false negative chance: 0.000 # git bisect bad c9d3d9667443caafa804cd07940aeaef8e53aa90 Bisecting: 0 revisions left to test after this (roughly 0 steps) [8a3637027ceeba4ca5e500b23cb7d24c25592513] comedi: das6402: Fix bit shift out of bounds determine whether the revision contains the guilty commit revision 33eba752d9de7ba2ebf54648adfae6c38f62600c crashed and is reachable testing commit 8a3637027ceeba4ca5e500b23cb7d24c25592513 gcc compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7 kernel signature: 94539a83d04aff8a3ce42e40b534a73cc0d750e124d5f11dc11b8f3909604a65 all runs: crashed: WARNING in comedi_unlocked_ioctl representative crash: WARNING in comedi_unlocked_ioctl, types: [WARNING] # git bisect good 8a3637027ceeba4ca5e500b23cb7d24c25592513 c9d3d9667443caafa804cd07940aeaef8e53aa90 is the first bad commit commit c9d3d9667443caafa804cd07940aeaef8e53aa90 Author: Ian Abbott Date: Fri Jul 4 13:04:05 2025 +0100 comedi: Fail COMEDI_INSNLIST ioctl if n_insns is too large commit 08ae4b20f5e82101d77326ecab9089e110f224cc upstream. The handling of the `COMEDI_INSNLIST` ioctl allocates a kernel buffer to hold the array of `struct comedi_insn`, getting the length from the `n_insns` member of the `struct comedi_insnlist` supplied by the user. The allocation will fail with a WARNING and a stack dump if it is too large. Avoid that by failing with an `-EINVAL` error if the supplied `n_insns` value is unreasonable. Define the limit on the `n_insns` value in the `MAX_INSNS` macro. Set this to the same value as `MAX_SAMPLES` (65536), which is the maximum allowed sum of the values of the member `n` in the array of `struct comedi_insn`, and sensible comedi instructions will have an `n` of at least 1. Reported-by: syzbot+d6995b62e5ac7d79557a@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=d6995b62e5ac7d79557a Fixes: ed9eccbe8970 ("Staging: add comedi core") Tested-by: Ian Abbott Cc: stable@vger.kernel.org # 5.13+ Signed-off-by: Ian Abbott Link: https://lore.kernel.org/r/20250704120405.83028-1-abbotti@mev.co.uk Signed-off-by: Greg Kroah-Hartman drivers/comedi/comedi_fops.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) accumulated error probability: 0.00 culprit signature: 6e9194939d50e474f10e4572003575761b7a9efb53793e4bf7ff5c9d91d7410c parent signature: 94539a83d04aff8a3ce42e40b534a73cc0d750e124d5f11dc11b8f3909604a65 revisions tested: 17, total time: 4h20m56.366377086s (build: 1h34m7.478783484s, test: 2h37m10.636299726s) first good commit: c9d3d9667443caafa804cd07940aeaef8e53aa90 comedi: Fail COMEDI_INSNLIST ioctl if n_insns is too large recipients (to): ["abbotti@mev.co.uk" "gregkh@linuxfoundation.org"] recipients (cc): []