ci2 starts bisection 2026-01-04 16:45:17.297034831 +0000 UTC m=+3381329.474157928 bisecting fixing commit since d96eb99e2f0e32b6d29e7f12a790b08c08825503 building syzkaller on 88248e14c8cbf1fbd42c1a1a91b709987b4be842 ensuring issue is reproducible on original commit d96eb99e2f0e32b6d29e7f12a790b08c08825503 testing commit d96eb99e2f0e32b6d29e7f12a790b08c08825503 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: d83d228bc3f872a60dc2ff97ae21e96f5222001df674be10dcfd3108de4ae81f run #0: crashed: KASAN: slab-use-after-free Read in __lock_sock run #1: crashed: KASAN: slab-use-after-free Read in __lock_sock run #2: crashed: WARNING: ODEBUG bug in __sk_destruct run #3: crashed: KASAN: slab-use-after-free Read in lock_sock_nested run #4: crashed: KASAN: slab-use-after-free Read in __lock_sock run #5: crashed: KASAN: slab-use-after-free Read in lock_sock_nested run #6: crashed: KASAN: slab-use-after-free Read in release_sock run #7: crashed: WARNING: ODEBUG bug in __sk_destruct run #8: crashed: KASAN: slab-use-after-free Read in __lock_sock run #9: crashed: KASAN: slab-use-after-free Read in lock_sock_nested run #10: crashed: KASAN: slab-use-after-free Read in __lock_sock run #11: crashed: KASAN: slab-use-after-free Read in kcm_tx_work run #12: crashed: KASAN: slab-use-after-free Read in __lock_sock run #13: crashed: KASAN: slab-use-after-free Read in __lock_sock run #14: crashed: KASAN: slab-use-after-free Read in sock_def_write_space run #15: crashed: KASAN: slab-use-after-free Read in lock_sock_nested run #16: crashed: KASAN: slab-use-after-free Read in sock_def_write_space run #17: crashed: KASAN: slab-use-after-free Read in sock_def_write_space run #18: crashed: KASAN: slab-use-after-free Read in kcm_tx_work run #19: OK representative crash: KASAN: slab-use-after-free Read in __lock_sock, types: [KASAN-USE-AFTER-FREE-READ] check whether we can drop unnecessary instrumentation disabling configs for [memleak ubsan bug_or_warning locking atomic_sleep hang], they are not needed testing commit d96eb99e2f0e32b6d29e7f12a790b08c08825503 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 656155cc5fab3d38202370d8743b43a85b07e39fc3ef67370d4d5eee8b97ff80 run #0: crashed: KASAN: slab-use-after-free Read in sock_def_write_space run #1: crashed: KASAN: slab-use-after-free Read in kcm_tx_work run #2: crashed: KASAN: slab-use-after-free Read in lock_sock_nested run #3: crashed: KASAN: slab-use-after-free Read in __lock_sock run #4: crashed: KASAN: slab-use-after-free Read in lock_sock_nested run #5: crashed: KASAN: slab-use-after-free Read in sock_def_write_space run #6: OK run #7: OK run #8: OK run #9: OK representative crash: KASAN: slab-use-after-free Read in sock_def_write_space, types: [KASAN-USE-AFTER-FREE-READ] the bug reproduces without the instrumentation disabling configs for [bug_or_warning locking atomic_sleep hang memleak ubsan], they are not needed kconfig minimization: base=3913 full=7800 leaves diff=2160 split chunks (needed=false): <2160> split chunk #0 of len 2160 into 5 parts testing without sub-chunk 1/5 disabling configs for [atomic_sleep hang memleak ubsan bug_or_warning locking], they are not needed testing commit d96eb99e2f0e32b6d29e7f12a790b08c08825503 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: bffdb2214f3a64a8a28c5fc8fbad40b129a05f3e14f290a8e66f94d301986716 all runs: OK false negative chance: 0.000 testing without sub-chunk 2/5 disabling configs for [hang memleak ubsan bug_or_warning locking atomic_sleep], they are not needed testing commit d96eb99e2f0e32b6d29e7f12a790b08c08825503 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 885bda41bdfbf5461888b1a4e1579cc0d941947e1d365e305e2c728f53ba4df4 run #0: crashed: KASAN: slab-use-after-free Read in __lock_sock run #1: crashed: KASAN: slab-use-after-free Read in sock_def_write_space run #2: crashed: KASAN: slab-use-after-free Read in lock_sock_nested run #3: crashed: KASAN: slab-use-after-free Read in __lock_sock run #4: crashed: KASAN: slab-use-after-free Read in __lock_sock run #5: crashed: KASAN: slab-use-after-free Read in sock_def_write_space run #6: crashed: KASAN: slab-use-after-free Read in __lock_sock run #7: OK run #8: OK run #9: OK representative crash: KASAN: slab-use-after-free Read in __lock_sock, types: [KASAN-USE-AFTER-FREE-READ] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed testing commit d96eb99e2f0e32b6d29e7f12a790b08c08825503 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 72207126b4b4c6336ff3e3b662f286d0209e997952a00b06701557ba263dedb6 run #0: crashed: KASAN: slab-use-after-free Read in __lock_sock run #1: crashed: KASAN: slab-use-after-free Read in lock_sock_nested run #2: crashed: KASAN: slab-use-after-free Read in kcm_write_msgs run #3: crashed: KASAN: slab-use-after-free Read in __lock_sock run #4: crashed: KASAN: slab-use-after-free Read in process_scheduled_works run #5: crashed: KASAN: slab-use-after-free Read in lock_sock_nested run #6: OK run #7: OK run #8: OK run #9: OK representative crash: KASAN: slab-use-after-free Read in __lock_sock, types: [KASAN-USE-AFTER-FREE-READ] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [hang memleak ubsan bug_or_warning locking atomic_sleep], they are not needed testing commit d96eb99e2f0e32b6d29e7f12a790b08c08825503 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 5bb7ae518ff035293640d642c92bf515ca4aedc91d9992846d15235b23142032 run #0: crashed: KASAN: slab-use-after-free Read in release_sock run #1: crashed: KASAN: slab-use-after-free Write in process_scheduled_works run #2: crashed: KASAN: slab-use-after-free Read in lock_sock_nested run #3: crashed: KASAN: slab-use-after-free Read in lock_sock_nested run #4: crashed: KASAN: slab-use-after-free Read in process_scheduled_works run #5: crashed: KASAN: slab-use-after-free Read in lock_sock_nested run #6: crashed: KASAN: slab-use-after-free Read in lock_sock_nested run #7: crashed: KASAN: slab-use-after-free Read in lock_sock_nested run #8: OK run #9: OK representative crash: KASAN: slab-use-after-free Read in release_sock, types: [KASAN-USE-AFTER-FREE-READ] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [bug_or_warning locking atomic_sleep hang memleak ubsan], they are not needed testing commit d96eb99e2f0e32b6d29e7f12a790b08c08825503 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: f72d91df119edcc4db64f08601c5feb7d44a85d3fc892dd9b6a0851942b910d5 run #0: crashed: KASAN: slab-use-after-free Read in lock_sock_nested run #1: crashed: KASAN: slab-use-after-free Read in lock_sock_nested run #2: crashed: KASAN: slab-use-after-free Read in lock_sock_nested run #3: crashed: KASAN: slab-use-after-free Read in lock_sock_nested run #4: crashed: KASAN: slab-use-after-free Read in lock_sock_nested run #5: crashed: KASAN: slab-use-after-free Read in lock_sock_nested run #6: OK run #7: OK run #8: OK run #9: OK representative crash: KASAN: slab-use-after-free Read in lock_sock_nested, types: [KASAN-USE-AFTER-FREE-READ] the chunk can be dropped minimized to 432 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_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 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 [bug_or_warning locking atomic_sleep hang memleak ubsan], they are not needed testing current HEAD 5fa4793a2d2d70ad08b85387b41020f1fcc2d19e testing commit 5fa4793a2d2d70ad08b85387b41020f1fcc2d19e gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 6c053ac446cda98028e7ff7704da523822bb18c976cf1b1d669f4c39a896d1bc run #0: crashed: KASAN: slab-use-after-free Read in lock_sock_nested run #1: crashed: KASAN: slab-use-after-free Read in sock_def_write_space run #2: crashed: KASAN: slab-use-after-free Read in process_scheduled_works run #3: crashed: KASAN: slab-use-after-free Read in lock_sock_nested run #4: crashed: KASAN: slab-use-after-free Read in kcm_tx_work run #5: crashed: KASAN: slab-use-after-free Read in lock_sock_nested run #6: crashed: KASAN: slab-use-after-free Read in release_sock run #7: crashed: KASAN: slab-use-after-free Read in lock_sock_nested run #8: crashed: KASAN: slab-use-after-free Read in release_sock run #9: crashed: KASAN: slab-use-after-free Read in lock_sock_nested representative crash: KASAN: slab-use-after-free Read in lock_sock_nested, types: [KASAN-USE-AFTER-FREE-READ] crash still not fixed/happens on the oldest tested release revisions tested: 8, total time: 3h13m24.042587083s (build: 47m21.533252415s, test: 1h50m41.904795003s) crash still not fixed or there were kernel test errors commit msg: Linux 6.6.119 crash: KASAN: slab-use-after-free Read in lock_sock_nested ================================================================== BUG: KASAN: slab-use-after-free in __lock_acquire+0x91/0xba0 kernel/locking/lockdep.c:5009 Read of size 8 at addr ffff888173802c38 by task kworker/u4:10/1277 CPU: 1 PID: 1277 Comm: kworker/u4:10 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Workqueue: kkcmd kcm_tx_work Call Trace: dump_stack_lvl+0xe0/0x160 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0xac/0x220 mm/kasan/report.c:468 kasan_report+0x117/0x150 mm/kasan/report.c:581 __lock_acquire+0x91/0xba0 kernel/locking/lockdep.c:5009 lock_acquire+0x171/0x350 kernel/locking/lockdep.c:5754 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x33/0x50 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:356 [inline] lock_sock_nested+0x4f/0xd0 net/core/sock.c:3538 lock_sock include/net/sock.h:1767 [inline] kcm_tx_work+0x2c/0x140 net/kcm/kcmsock.c:716 process_one_work kernel/workqueue.c:2634 [inline] process_scheduled_works+0x92b/0x11f0 kernel/workqueue.c:2711 worker_thread+0x856/0xc80 kernel/workqueue.c:2792 kthread+0x229/0x280 kernel/kthread.c:388 ret_from_fork+0x2f/0x60 arch/x86/kernel/process.c:152 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293 Allocated by task 3296: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4e/0x70 mm/kasan/common.c:52 __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:188 [inline] slab_post_alloc_hook+0x66/0x430 mm/slab.h:767 slab_alloc_node mm/slub.c:3495 [inline] slab_alloc mm/slub.c:3503 [inline] __kmem_cache_alloc_lru mm/slub.c:3510 [inline] kmem_cache_alloc+0x11e/0x2a0 mm/slub.c:3519 sk_prot_alloc+0x51/0x1c0 net/core/sock.c:2090 sk_alloc+0x34/0x830 net/core/sock.c:2152 kcm_clone net/kcm/kcmsock.c:1518 [inline] kcm_ioctl+0x28e/0xe20 net/kcm/kcmsock.c:1563 sock_do_ioctl+0xd1/0x260 net/socket.c:1222 sock_ioctl+0x4a7/0x560 net/socket.c:1341 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:871 [inline] __se_sys_ioctl+0xad/0x100 fs/ioctl.c:857 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Freed by task 3297: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4e/0x70 mm/kasan/common.c:52 kasan_save_free_info+0x2e/0x50 mm/kasan/generic.c:522 ____kasan_slab_free+0x126/0x1e0 mm/kasan/common.c:236 kasan_slab_free include/linux/kasan.h:164 [inline] slab_free_hook mm/slub.c:1811 [inline] slab_free_freelist_hook+0x130/0x1b0 mm/slub.c:1837 slab_free mm/slub.c:3830 [inline] kmem_cache_free+0xe7/0x250 mm/slub.c:3852 sk_prot_free net/core/sock.c:2133 [inline] __sk_destruct+0x38c/0x530 net/core/sock.c:2230 kcm_release+0x379/0x4f0 net/kcm/kcmsock.c:1738 __sock_release net/socket.c:659 [inline] sock_close+0xb3/0x210 net/socket.c:1421 __fput+0x1b1/0x790 fs/file_table.c:384 __do_sys_close fs/open.c:1573 [inline] __se_sys_close+0x118/0x170 fs/open.c:1558 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Last potentially related work creation: kasan_save_stack+0x3e/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xaf/0xc0 mm/kasan/generic.c:492 insert_work+0x37/0x1f0 kernel/workqueue.c:1651 __queue_work+0x801/0xa50 kernel/workqueue.c:1800 queue_work_on+0xbe/0x140 kernel/workqueue.c:1835 queue_work include/linux/workqueue.h:562 [inline] kcm_unattach+0x8c2/0xe60 net/kcm/kcmsock.c:1427 kcm_unattach_ioctl net/kcm/kcmsock.c:1484 [inline] kcm_ioctl+0x6d5/0xe20 net/kcm/kcmsock.c:1551 sock_do_ioctl+0xd1/0x260 net/socket.c:1222 sock_ioctl+0x4a7/0x560 net/socket.c:1341 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:871 [inline] __se_sys_ioctl+0xad/0x100 fs/ioctl.c:857 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Second to last potentially related work creation: kasan_save_stack+0x3e/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xaf/0xc0 mm/kasan/generic.c:492 insert_work+0x37/0x1f0 kernel/workqueue.c:1651 __queue_work+0x801/0xa50 kernel/workqueue.c:1800 queue_work_on+0xbe/0x140 kernel/workqueue.c:1835 kcm_attach net/kcm/kcmsock.c:1307 [inline] kcm_attach_ioctl net/kcm/kcmsock.c:1335 [inline] kcm_ioctl+0xc9a/0xe20 net/kcm/kcmsock.c:1541 sock_do_ioctl+0xd1/0x260 net/socket.c:1222 sock_ioctl+0x4a7/0x560 net/socket.c:1341 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:871 [inline] __se_sys_ioctl+0xad/0x100 fs/ioctl.c:857 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 The buggy address belongs to the object at ffff888173802b80 which belongs to the cache KCM of size 1720 The buggy address is located 184 bytes inside of freed 1720-byte region [ffff888173802b80, ffff888173803238) The buggy address belongs to the physical page: page:ffffea0005ce0000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x173800 head:ffffea0005ce0000 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff88817774f601 flags: 0x100000000000840(slab|head|node=0|zone=2) page_type: 0xffffffff() raw: 0100000000000840 ffff888106b3ea00 dead000000000122 0000000000000000 raw: 0000000000000000 0000000080110011 00000001ffffffff ffff88817774f601 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 3276, tgid 3273 (syz.2.16), ts 76025339353, free_ts 75946438942 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x26b/0x290 mm/page_alloc.c:1554 prep_new_page mm/page_alloc.c:1561 [inline] get_page_from_freelist+0x3447/0x35f0 mm/page_alloc.c:3191 __alloc_pages+0x1e3/0x430 mm/page_alloc.c:4457 alloc_slab_page+0x5d/0x170 mm/slub.c:1881 allocate_slab mm/slub.c:2028 [inline] new_slab+0x70/0x260 mm/slub.c:2081 ___slab_alloc+0xa3e/0xee0 mm/slub.c:3253 __slab_alloc mm/slub.c:3339 [inline] __slab_alloc_node mm/slub.c:3392 [inline] slab_alloc_node mm/slub.c:3485 [inline] slab_alloc mm/slub.c:3503 [inline] __kmem_cache_alloc_lru mm/slub.c:3510 [inline] kmem_cache_alloc+0x19c/0x2a0 mm/slub.c:3519 sk_prot_alloc+0x51/0x1c0 net/core/sock.c:2090 sk_alloc+0x34/0x830 net/core/sock.c:2152 kcm_clone net/kcm/kcmsock.c:1518 [inline] kcm_ioctl+0x28e/0xe20 net/kcm/kcmsock.c:1563 sock_do_ioctl+0xd1/0x260 net/socket.c:1222 sock_ioctl+0x4a7/0x560 net/socket.c:1341 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:871 [inline] __se_sys_ioctl+0xad/0x100 fs/ioctl.c:857 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1154 [inline] free_unref_page_prepare+0x7f9/0x910 mm/page_alloc.c:2336 free_unref_page+0x32/0x290 mm/page_alloc.c:2429 discard_slab mm/slub.c:2127 [inline] __unfreeze_partials+0x1a4/0x1e0 mm/slub.c:2667 put_cpu_partial+0x14c/0x1b0 mm/slub.c:2743 __slab_free+0x297/0x380 mm/slub.c:3700 qlink_free mm/kasan/quarantine.c:166 [inline] qlist_free_all+0x75/0xe0 mm/kasan/quarantine.c:185 kasan_quarantine_reduce+0x143/0x160 mm/kasan/quarantine.c:292 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:188 [inline] slab_post_alloc_hook+0x66/0x430 mm/slab.h:767 slab_alloc_node mm/slub.c:3495 [inline] slab_alloc mm/slub.c:3503 [inline] __kmem_cache_alloc_lru mm/slub.c:3510 [inline] kmem_cache_alloc+0x11e/0x2a0 mm/slub.c:3519 vm_area_alloc+0x1f/0x190 kernel/fork.c:486 __mmap_region mm/mmap.c:2770 [inline] mmap_region+0xac9/0x1810 mm/mmap.c:2941 do_mmap+0x710/0xc30 mm/mmap.c:1385 vm_mmap_pgoff+0x191/0x350 mm/util.c:556 ksys_mmap_pgoff+0x2c2/0x3b0 mm/mmap.c:1431 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 Memory state around the buggy address: ffff888173802b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888173802b80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888173802c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888173802c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888173802d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================