ci2 starts bisection 2025-09-29 04:25:09.801774534 +0000 UTC m=+208023.162332791 bisecting cause commit starting from 8f9736633f8ca0224d6dd0cf6826044b7b5f9737 building syzkaller on 001c90610fb2f2ac7cbbc9cd6af3f547b821a8ad ensuring issue is reproducible on original commit 8f9736633f8ca0224d6dd0cf6826044b7b5f9737 testing commit 8f9736633f8ca0224d6dd0cf6826044b7b5f9737 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 9abb2febe5354e2038a3e685f2bf78acdb5d751e3f32774978df4235f69537cd run #0: crashed: KASAN: use-after-free Read in bch2_extent_ptr_to_text run #1: crashed: KASAN: use-after-free Read in bch2_extent_ptr_to_text run #2: crashed: KASAN: use-after-free Read in bch2_extent_ptr_to_text run #3: crashed: KASAN: use-after-free Read in bch2_extent_ptr_to_text run #4: crashed: KASAN: use-after-free Read in bch2_extent_ptr_to_text run #5: crashed: KASAN: use-after-free Read in bch2_extent_ptr_to_text run #6: crashed: KASAN: use-after-free Read in bch2_extent_ptr_to_text run #7: crashed: KASAN: use-after-free Read in bch2_extent_ptr_to_text run #8: crashed: KASAN: use-after-free Read in bch2_extent_ptr_to_text run #9: crashed: KASAN: use-after-free Read in bch2_extent_ptr_to_text run #10: crashed: KASAN: use-after-free Read in bch2_extent_ptr_to_text run #11: crashed: KASAN: use-after-free Read in bch2_extent_ptr_to_text run #12: crashed: KASAN: use-after-free Read in bch2_extent_ptr_to_text run #13: crashed: KASAN: use-after-free Read in bch2_extent_ptr_to_text run #14: crashed: KASAN: use-after-free Read in bch2_extent_ptr_to_text run #15: crashed: KASAN: use-after-free Read in bch2_extent_ptr_to_text run #16: crashed: KASAN: use-after-free Read in bch2_extent_ptr_to_text run #17: crashed: KASAN: use-after-free Read in bch2_extent_ptr_to_text run #18: crashed: BUG: unable to handle kernel paging request in bch2_extent_ptr_to_text run #19: crashed: KASAN: use-after-free Read in bch2_extent_ptr_to_text representative crash: KASAN: use-after-free Read in bch2_extent_ptr_to_text, types: [KASAN-USE-AFTER-FREE-READ] check whether we can drop unnecessary instrumentation disabling configs for [atomic_sleep hang memleak ubsan bug_or_warning locking], they are not needed testing commit 8f9736633f8ca0224d6dd0cf6826044b7b5f9737 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 68f45e9dff1668bcb4c3dad9078287070d2c76727d183ce47b24408bf3a08198 all runs: crashed: KASAN: use-after-free Read in bch2_extent_ptr_to_text representative crash: KASAN: use-after-free Read in bch2_extent_ptr_to_text, types: [KASAN-USE-AFTER-FREE-READ] the bug reproduces without the instrumentation disabling configs for [hang memleak ubsan bug_or_warning locking atomic_sleep], they are not needed kconfig minimization: base=4092 full=8349 leaves diff=2174 split chunks (needed=false): <2174> split chunk #0 of len 2174 into 5 parts testing without sub-chunk 1/5 disabling configs for [locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed testing commit 8f9736633f8ca0224d6dd0cf6826044b7b5f9737 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 6b1b615753e7a0608b7c7a140a567866f51d39f6e2cda3569f74ba5813fb8e58 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 locking], they are not needed testing commit 8f9736633f8ca0224d6dd0cf6826044b7b5f9737 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: e7412377574b42a19a875c169d1084ce04e5c8b84c1f96a3a05b168e8276d705 all runs: crashed: KASAN: use-after-free Read in bch2_extent_ptr_to_text representative crash: KASAN: use-after-free Read in bch2_extent_ptr_to_text, 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 8f9736633f8ca0224d6dd0cf6826044b7b5f9737 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 3445c87d324be6bff5391ad155d67ebf125b2f161f5d6aba1b24d8a2754b25c1 all runs: crashed: KASAN: use-after-free Read in bch2_extent_ptr_to_text representative crash: KASAN: use-after-free Read in bch2_extent_ptr_to_text, 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 8f9736633f8ca0224d6dd0cf6826044b7b5f9737 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 8ce7d089229570047eeea16cff157e633a95a7064e524dec40fba8b28b434cf0 all runs: crashed: KASAN: use-after-free Read in bch2_extent_ptr_to_text representative crash: KASAN: use-after-free Read in bch2_extent_ptr_to_text, types: [KASAN-USE-AFTER-FREE-READ] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed testing commit 8f9736633f8ca0224d6dd0cf6826044b7b5f9737 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 4bcc1c9204fddb3045bea49a7657a07497fa9146c940a0c305fc011b51fb2b7b all runs: crashed: KASAN: use-after-free Read in bch2_extent_ptr_to_text representative crash: KASAN: use-after-free Read in bch2_extent_ptr_to_text, types: [KASAN-USE-AFTER-FREE-READ] the chunk can be dropped minimized to 435 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_NHLT 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_HAS_CPU_ATTACK_VECTORS ARCH_HAS_USER_SHADOW_STACK ARCH_SUPPORTS_HUGETLBFS 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_LEDS 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 BCACHEFS_DEBUG BCACHEFS_ERASURE_CODING BCACHEFS_FS BCACHEFS_POSIX_ACL BCACHEFS_QUOTA BCACHEFS_SIX_OPTIMISTIC_SPIN 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_DEV_BSGLIB BLK_DEV_INTEGRITY 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_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_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_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_MRVL BT_MRVL_SDIO BT_MSFTEXT BT_MTK BT_MTKSDIO BT_MTKUART 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 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 CLOSURES CLS_U32_MARK CLS_U32_PERF CMA CMA_SIZE_SEL_MAX 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 CRC64 CRC64_ARCH CRC8 CRC_ITU_T CRC_T10DIF CRC_T10DIF_ARCH CRYPTO_842 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_CRC32C 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_ECDH CRYPTO_ECRDSA CRYPTO_ENGINE CRYPTO_ESSIV CRYPTO_FCRYPT CRYPTO_GHASH_CLMUL_NI_INTEL CRYPTO_HCTR2 CRYPTO_HKDF CRYPTO_KDF800108_CTR CRYPTO_KHAZAD CRYPTO_KPP CRYPTO_KRB5 CRYPTO_KRB5ENC CRYPTO_LIB_ARC4 CRYPTO_LIB_CHACHA CRYPTO_LIB_CHACHA20POLY1305 CRYPTO_LIB_CHACHA_GENERIC CRYPTO_LIB_CURVE25519 CRYPTO_LIB_CURVE25519_GENERIC CRYPTO_LIB_CURVE25519_INTERNAL CRYPTO_LIB_DES CRYPTO_LIB_POLY1305 CRYPTO_LIB_POLY1305_GENERIC CRYPTO_LIB_SHA1_ARCH CRYPTO_LIB_SHA256_ARCH CRYPTO_LIB_SHA512 CRYPTO_LIB_SHA512_ARCH CRYPTO_LIB_SM3 CRYPTO_LRW CRYPTO_LZ4 CRYPTO_LZ4HC CRYPTO_MICHAEL_MIC CRYPTO_NHPOLY1305 CRYPTO_NHPOLY1305_AVX2 CRYPTO_NHPOLY1305_SSE2 CRYPTO_PCBC CRYPTO_PCRYPT 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_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_WP512 CRYPTO_XCBC CRYPTO_XCTR CRYPTO_XTS CRYPTO_XXHASH CRYPTO_ZSTD CUSE CYPRESS_FIRMWARE DAMON DAMON_PADDR DAMON_RECLAIM DAMON_VADDR DCA DCB DEBUG_VFS DEFAULT_CODEL DEVICE_MIGRATION DEVICE_PRIVATE DMA_CMA FSCACHE FUSE_FS GPIOLIB HAMRADIO INFINIBAND INFINIBAND_ADDR_TRANS INFINIBAND_RTRS_CLIENT IOSCHED_BFQ ISA_BUS LIBNVDIMM MAC80211 MAC80211_DEBUGFS MAC80211_LEDS MEDIA_SUPPORT MEMORY_HOTPLUG MEMORY_HOTREMOVE MMC MTD NET_CLS_U32 NET_SCH_DEFAULT PARTITION_ADVANCED PCCARD PCMCIA RFKILL SERIAL_DEV_BUS TLS TLS_DEVICE USB_GADGET USB_PHY VLAN_8021Q WANT_COMPAT_NETLINK_MESSAGES WEXT_CORE WIRELESS WLAN WLAN_VENDOR_ATH ZONE_DEVICE] disabling configs for [ubsan bug_or_warning locking atomic_sleep hang memleak], they are not needed picked [v6.16 v6.15 v6.14 v6.12 v6.10 v6.8 v6.6 v6.4 v6.1 v5.18 v5.15 v5.12 v5.9 v5.6 v5.3 v5.0 v4.19] out of 39 release tags testing release v6.16 testing commit 038d61fd642278bab63ee8ef722c50d10ab01e8f gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: dc0a4171314fa9a5ad4defbc844699ad3b11c0b4420162c4b81935df9f1a6a76 all runs: crashed: KASAN: use-after-free Read in bch2_extent_ptr_to_text representative crash: KASAN: use-after-free Read in bch2_extent_ptr_to_text, types: [KASAN-USE-AFTER-FREE-READ] testing release v6.15 testing commit 0ff41df1cb268fc69e703a08a57ee14ae967d0ca gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 795027b945a5afa92728aea0fca8545f15f230ec6b87efb05c20030747f6beff all runs: crashed: KASAN: use-after-free Read in bch2_extent_ptr_to_text representative crash: KASAN: use-after-free Read in bch2_extent_ptr_to_text, types: [KASAN-USE-AFTER-FREE-READ] testing release v6.14 testing commit 38fec10eb60d687e30c8c6b5420d86e8149f7557 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: ddeb7b5e6eb675d1527c610b0d94c0c5dd6fa7cc6dd27221fd16be0270d15236 all runs: crashed: KASAN: use-after-free Read in bch2_extent_ptr_to_text representative crash: KASAN: use-after-free Read in bch2_extent_ptr_to_text, types: [KASAN-USE-AFTER-FREE-READ] testing release v6.12 testing commit adc218676eef25575469234709c2d87185ca223a gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 8201a871d4e07466c58393a7046a38fa3b73908bde9813bd572510fae1fac8cb all runs: crashed: KASAN: use-after-free Read in bch2_extent_ptr_to_text representative crash: KASAN: use-after-free Read in bch2_extent_ptr_to_text, types: [KASAN-USE-AFTER-FREE-READ] testing release v6.10 testing commit 0c3836482481200ead7b416ca80c68a29cfdaabd gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: d0f2c3cca50457212e47275cae75277728eef55917e75826b463be5d81b6b9c2 all runs: OK false negative chance: 0.000 # git bisect start adc218676eef25575469234709c2d87185ca223a 0c3836482481200ead7b416ca80c68a29cfdaabd Bisecting: 14868 revisions left to test after this (roughly 14 steps) [703896be3015db7f8fd8822b18909a5914209a70] Merge tag 'sound-6.11-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound testing commit 703896be3015db7f8fd8822b18909a5914209a70 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 1a7663a654b8974d1029b695f8112f16aa49cfdbf3dd4aceface92c0a3790999 all runs: crashed: KASAN: use-after-free Read in bch2_extent_ptr_to_text representative crash: KASAN: use-after-free Read in bch2_extent_ptr_to_text, types: [KASAN-USE-AFTER-FREE-READ] # git bisect bad 703896be3015db7f8fd8822b18909a5914209a70 Bisecting: 6814 revisions left to test after this (roughly 13 steps) [b3ce7a30847a54a7f96a35e609303d8afecd460b] Merge tag 'drm-next-2024-07-18' of https://gitlab.freedesktop.org/drm/kernel testing commit b3ce7a30847a54a7f96a35e609303d8afecd460b gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 4fd9f0d75d9fa275c47c7fd5c10876e307122d6b91d959a936e31b1cea152225 all runs: OK false negative chance: 0.000 # git bisect good b3ce7a30847a54a7f96a35e609303d8afecd460b Bisecting: 3536 revisions left to test after this (roughly 12 steps) [7846b618e0a4c3e08888099d1d4512722b39ca99] Merge tag 'rtc-6.11' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux testing commit 7846b618e0a4c3e08888099d1d4512722b39ca99 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: f194b56e767d34bd5ab498bd4ac5cd17a72edbd3b7388474242af1ae7f121312 all runs: OK false negative chance: 0.000 # git bisect good 7846b618e0a4c3e08888099d1d4512722b39ca99 Bisecting: 1754 revisions left to test after this (roughly 11 steps) [183d46ff422ef9f3d755b6808ef3faa6d009ba3a] Merge tag 'net-6.11-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net testing commit 183d46ff422ef9f3d755b6808ef3faa6d009ba3a gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 0cbeb012312414d537830030bc777e50ef23eaa88d834fee9830702007575c71 all runs: OK false negative chance: 0.000 # git bisect good 183d46ff422ef9f3d755b6808ef3faa6d009ba3a Bisecting: 876 revisions left to test after this (roughly 10 steps) [6e4436539ae182dc86d57d13849862bcafaa4709] Merge tag 'hid-for-linus-2024081901' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid testing commit 6e4436539ae182dc86d57d13849862bcafaa4709 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 85f9bc205a0dd48dd7bd0e8b2b059db54385b2cc32d62eaa5228228c617e4cda all runs: crashed: KASAN: use-after-free Read in bch2_extent_ptr_to_text representative crash: KASAN: use-after-free Read in bch2_extent_ptr_to_text, types: [KASAN-USE-AFTER-FREE-READ] # git bisect bad 6e4436539ae182dc86d57d13849862bcafaa4709 Bisecting: 438 revisions left to test after this (roughly 9 steps) [7299cd48aeceba873a52968d6d6edb34c15bac11] Merge tag 'i2c-for-6.11-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux testing commit 7299cd48aeceba873a52968d6d6edb34c15bac11 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 305fa59b6d709eacafeebf046ff6535b331713c47db2efd579d9a8b8e618348d all runs: OK false negative chance: 0.000 # git bisect good 7299cd48aeceba873a52968d6d6edb34c15bac11 Bisecting: 220 revisions left to test after this (roughly 8 steps) [d7a5aa4b3c007fae50405ca75c40258d90300e96] Merge tag 'perf-tools-fixes-for-v6.11-2024-08-15' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools testing commit d7a5aa4b3c007fae50405ca75c40258d90300e96 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 639fc856aae85deedda34ecdb28c205591c910d482a9a6aef963a65e1fc5d53b all runs: OK false negative chance: 0.000 # git bisect good d7a5aa4b3c007fae50405ca75c40258d90300e96 Bisecting: 111 revisions left to test after this (roughly 7 steps) [c5ac744cdddae82916d4cd35d962d3f47065e68a] Merge tag 'io_uring-6.11-20240824' of git://git.kernel.dk/linux testing commit c5ac744cdddae82916d4cd35d962d3f47065e68a gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 7ba0d683e2810a78386be283d1c499edf788fb59f655af3718588c79ad1e27bc all runs: OK false negative chance: 0.000 # git bisect good c5ac744cdddae82916d4cd35d962d3f47065e68a Bisecting: 55 revisions left to test after this (roughly 6 steps) [810996a36309a56a39b406d9ad2903115714228f] Merge tag 'powerpc-6.11-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux testing commit 810996a36309a56a39b406d9ad2903115714228f gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 556d6531d46961b82cfeb50164239993e5f2dde6dd1d564982bc7fd47b4730f1 all runs: crashed: KASAN: use-after-free Read in bch2_extent_ptr_to_text representative crash: KASAN: use-after-free Read in bch2_extent_ptr_to_text, types: [KASAN-USE-AFTER-FREE-READ] # git bisect bad 810996a36309a56a39b406d9ad2903115714228f Bisecting: 21 revisions left to test after this (roughly 5 steps) [b71817585383d96ddc51ebd126f6253fdb9a8568] Merge tag 'bcachefs-2024-08-16' of git://evilpiepirate.org/bcachefs testing commit b71817585383d96ddc51ebd126f6253fdb9a8568 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 58650fc8f6c8f3798abfa145fee94696cc2c389f86b704660025da0f15762d49 all runs: crashed: KASAN: use-after-free Read in bch2_extent_ptr_to_text representative crash: KASAN: use-after-free Read in bch2_extent_ptr_to_text, types: [KASAN-USE-AFTER-FREE-READ] # git bisect bad b71817585383d96ddc51ebd126f6253fdb9a8568 Bisecting: 16 revisions left to test after this (roughly 4 steps) [9482f3b05332a624508a91c2ab2cf3527328a6a4] bcachefs: avoid overflowing LRU_TIME_BITS for cached data lru testing commit 9482f3b05332a624508a91c2ab2cf3527328a6a4 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: f2b6f227c4cc0acb47b826a7ea7e2049c553b9ba555edaaffafed80ed6df9910 all runs: crashed: KASAN: use-after-free Read in bch2_extent_ptr_to_text representative crash: KASAN: use-after-free Read in bch2_extent_ptr_to_text, types: [KASAN-USE-AFTER-FREE-READ] # git bisect bad 9482f3b05332a624508a91c2ab2cf3527328a6a4 Bisecting: 8 revisions left to test after this (roughly 3 steps) [7254555c440ff6b136aa97fb3c33fd5e0bb4fb9f] bcachefs: Add hysteresis to waiting on btree key cache flush testing commit 7254555c440ff6b136aa97fb3c33fd5e0bb4fb9f gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: b93f777042ebca2e3bb5c2f76765100b6dcea4bcee88425c4130ecba0dd54819 all runs: OK false negative chance: 0.000 # git bisect good 7254555c440ff6b136aa97fb3c33fd5e0bb4fb9f Bisecting: 4 revisions left to test after this (roughly 2 steps) [d97de0d017cde0d442c3d144b4f969f43064cc0f] bcachefs: Make bkey_fsck_err() a wrapper around fsck_err() testing commit d97de0d017cde0d442c3d144b4f969f43064cc0f gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: e5b50b4798aed323ef4b659f52cb92ab941dd5aca1f619194e700cad0420c7b1 all runs: crashed: KASAN: use-after-free Read in bch2_extent_ptr_to_text representative crash: KASAN: use-after-free Read in bch2_extent_ptr_to_text, types: [KASAN-USE-AFTER-FREE-READ] # git bisect bad d97de0d017cde0d442c3d144b4f969f43064cc0f Bisecting: 1 revision left to test after this (roughly 1 step) [06a8693b890c0cf7d94bf7c6f0e2adf3a3aaa346] bcachefs: Add a time_stat for blocked on key cache flush testing commit 06a8693b890c0cf7d94bf7c6f0e2adf3a3aaa346 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 8efb6ddd565e2475254a03a2c2e1890415e5d89086d43dde1c302716918a48e7 all runs: OK false negative chance: 0.000 # git bisect good 06a8693b890c0cf7d94bf7c6f0e2adf3a3aaa346 Bisecting: 0 revisions left to test after this (roughly 0 steps) [c99471024f24b3cbafc02bf5b112ecf34b0dbd40] bcachefs: Fix warning in __bch2_fsck_err() for trans not passed in testing commit c99471024f24b3cbafc02bf5b112ecf34b0dbd40 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: b8edcd8d56680f67d782e5a14608dccd718f91fa4b428f93fc29e7721bd71fea all runs: OK false negative chance: 0.000 # git bisect good c99471024f24b3cbafc02bf5b112ecf34b0dbd40 d97de0d017cde0d442c3d144b4f969f43064cc0f is the first bad commit commit d97de0d017cde0d442c3d144b4f969f43064cc0f Author: Kent Overstreet Date: Mon Aug 12 21:31:25 2024 -0400 bcachefs: Make bkey_fsck_err() a wrapper around fsck_err() bkey_fsck_err() was added as an interface that looks like fsck_err(), but previously all it did was ensure that the appropriate error counter was incremented in the superblock. This is a cleanup and bugfix patch that converts it to a wrapper around fsck_err(). This is needed to fix an issue with the upgrade path to disk_accounting_v3, where the "silent fix" error list now includes bkey_fsck errors; fsck_err() handles this in a unified way, and since we need to change printing of bkey fsck errors from the caller to the inner bkey_fsck_err() calls, this ends up being a pretty big change. Als,, rename .invalid() methods to .validate(), for clarity, while we're changing the function signature anyways (to drop the printbuf argument). Signed-off-by: Kent Overstreet fs/bcachefs/alloc_background.c | 63 ++++++++-------- fs/bcachefs/alloc_background.h | 26 +++---- fs/bcachefs/backpointers.c | 8 +- fs/bcachefs/backpointers.h | 5 +- fs/bcachefs/bkey.h | 7 +- fs/bcachefs/bkey_methods.c | 109 +++++++++++++-------------- fs/bcachefs/bkey_methods.h | 21 +++--- fs/bcachefs/btree_io.c | 67 +++++------------ fs/bcachefs/btree_node_scan.c | 2 +- fs/bcachefs/btree_trans_commit.c | 72 ++++-------------- fs/bcachefs/btree_update_interior.c | 16 +--- fs/bcachefs/data_update.c | 6 +- fs/bcachefs/dirent.c | 33 ++++----- fs/bcachefs/dirent.h | 5 +- fs/bcachefs/disk_accounting.c | 13 ++-- fs/bcachefs/disk_accounting.h | 5 +- fs/bcachefs/ec.c | 15 ++-- fs/bcachefs/ec.h | 5 +- fs/bcachefs/errcode.h | 1 + fs/bcachefs/error.c | 22 ++++++ fs/bcachefs/error.h | 39 ++++++---- fs/bcachefs/extents.c | 144 ++++++++++++++++++------------------ fs/bcachefs/extents.h | 24 +++--- fs/bcachefs/inode.c | 77 +++++++++---------- fs/bcachefs/inode.h | 24 +++--- fs/bcachefs/journal_io.c | 24 ++---- fs/bcachefs/lru.c | 9 +-- fs/bcachefs/lru.h | 5 +- fs/bcachefs/quota.c | 8 +- fs/bcachefs/quota.h | 5 +- fs/bcachefs/reflink.c | 19 ++--- fs/bcachefs/reflink.h | 22 +++--- fs/bcachefs/snapshot.c | 42 +++++------ fs/bcachefs/snapshot.h | 11 ++- fs/bcachefs/subvolume.c | 16 ++-- fs/bcachefs/subvolume.h | 5 +- fs/bcachefs/xattr.c | 21 +++--- fs/bcachefs/xattr.h | 5 +- 38 files changed, 448 insertions(+), 553 deletions(-) accumulated error probability: 0.00 culprit signature: e5b50b4798aed323ef4b659f52cb92ab941dd5aca1f619194e700cad0420c7b1 parent signature: b8edcd8d56680f67d782e5a14608dccd718f91fa4b428f93fc29e7721bd71fea revisions tested: 27, total time: 6h28m25.74396468s (build: 2h53m52.643814846s, test: 3h10m51.114609883s) first bad commit: d97de0d017cde0d442c3d144b4f969f43064cc0f bcachefs: Make bkey_fsck_err() a wrapper around fsck_err() recipients (to): ["kent.overstreet@linux.dev"] recipients (cc): [] crash: KASAN: use-after-free Read in bch2_extent_ptr_to_text pointer before first bucket (27 < 1024): delete?, shutting down bcachefs (loop2): inconsistency detected - emergency read only at journal seq 0 ================================================================== BUG: KASAN: use-after-free in dev_ptr_stale_rcu fs/bcachefs/buckets.h:188 [inline] BUG: KASAN: use-after-free in bch2_extent_ptr_to_text+0x493/0x4a0 fs/bcachefs/extents.c:1024 Read of size 1 at addr ffff8881907fe04e by task syz.2.17/3327 CPU: 1 UID: 0 PID: 3327 Comm: syz.2.17 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 Call Trace: dump_stack_lvl+0xf5/0x170 lib/dump_stack.c:119 print_address_description mm/kasan/report.c:377 [inline] print_report+0xca/0x250 mm/kasan/report.c:488 kasan_report+0x118/0x150 mm/kasan/report.c:601 dev_ptr_stale_rcu fs/bcachefs/buckets.h:188 [inline] bch2_extent_ptr_to_text+0x493/0x4a0 fs/bcachefs/extents.c:1024 bch2_bkey_ptrs_to_text+0x813/0xc70 fs/bcachefs/extents.c:1062 __bch2_bkey_fsck_err+0xf8/0x1f0 fs/bcachefs/error.c:429 bch2_bkey_ptrs_validate+0xdb1/0x12b0 fs/bcachefs/extents.c:-1 journal_validate_key+0x429/0xa20 fs/bcachefs/journal_io.c:370 journal_entry_btree_root_validate+0xff/0x3f0 fs/bcachefs/journal_io.c:455 bch2_sb_clean_validate_late fs/bcachefs/sb-clean.c:40 [inline] bch2_read_superblock_clean+0x18a/0x3c0 fs/bcachefs/sb-clean.c:168 bch2_fs_recovery+0x144/0x27f0 fs/bcachefs/recovery.c:632 bch2_fs_start+0x2fa/0x4d0 fs/bcachefs/super.c:1036 bch2_fs_get_tree+0x467/0xf90 fs/bcachefs/fs.c:1946 vfs_get_tree+0x84/0x1a0 fs/super.c:1800 do_new_mount+0x1c9/0x850 fs/namespace.c:3472 do_mount fs/namespace.c:3812 [inline] __do_sys_mount fs/namespace.c:4020 [inline] __se_sys_mount+0x21c/0x2c0 fs/namespace.c:3997 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x8f/0x180 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f95fea6066a Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f95fe0cde68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f95fe0cdef0 RCX: 00007f95fea6066a RDX: 0000200000005b40 RSI: 0000200000000000 RDI: 00007f95fe0cdeb0 RBP: 0000200000005b40 R08: 00007f95fe0cdef0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000000000 R13: 00007f95fe0cdeb0 R14: 000000000000594b R15: 0000200000000080 The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1907fe flags: 0x100000000000000(node=0|zone=2) raw: 0100000000000000 ffffea000641ff88 ffffea000641ff88 0000000000000000 raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner info is not present (never set?) Memory state around the buggy address: ffff8881907fdf00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff8881907fdf80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff8881907fe000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff8881907fe080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff8881907fe100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================