ci starts bisection 2025-06-10 21:19:41.576729885 +0000 UTC m=+31588.322590181 bisecting cause commit starting from b27cc623e01be9de1580eaa913508b237a7a9673 building syzkaller on 5d7e17caf7d0971d22446d8a81bcf1cd8c18a0dc ensuring issue is reproducible on original commit b27cc623e01be9de1580eaa913508b237a7a9673 testing commit b27cc623e01be9de1580eaa913508b237a7a9673 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 209d89613fb651b81d15b199e9596fd3be2dd415b1016d6b9c771c9bc69b21a6 all runs: crashed: divide error in bch2_sb_members_v2_to_text representative crash: divide error in bch2_sb_members_v2_to_text, types: [UNKNOWN] check whether we can drop unnecessary instrumentation disabling configs for [HANG LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit b27cc623e01be9de1580eaa913508b237a7a9673 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 4e1ab59fa038332102647142f344ad91245d232842601b503237ff76a12b51b3 all runs: crashed: divide error in bch2_sb_members_v2_to_text representative crash: divide error in bch2_sb_members_v2_to_text, types: [UNKNOWN] the bug reproduces without the instrumentation disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN], they are not needed kconfig minimization: base=4091 full=8369 leaves diff=2131 split chunks (needed=false): <2131> split chunk #0 of len 2131 into 5 parts testing without sub-chunk 1/5 disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed testing commit b27cc623e01be9de1580eaa913508b237a7a9673 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: f01b42b0180a57b769913401040f3af7b8856274bf340b5e2d47ecc7f473cdb9 all runs: OK false negative chance: 0.000 testing without sub-chunk 2/5 disabling configs for [UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK], they are not needed testing commit b27cc623e01be9de1580eaa913508b237a7a9673 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: a8aea34bf124f812c1be287bba6c437a1b6ab322b707e41a82a6696ee2a7b14c all runs: crashed: divide error in bch2_sb_members_v2_to_text representative crash: divide error in bch2_sb_members_v2_to_text, types: [UNKNOWN] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK], they are not needed testing commit b27cc623e01be9de1580eaa913508b237a7a9673 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: e4959639c3c22916fcf17db4bcdb2ac3caccf61f3353ef885fade0087f59d2a8 all runs: crashed: divide error in bch2_sb_members_v2_to_text representative crash: divide error in bch2_sb_members_v2_to_text, types: [UNKNOWN] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed testing commit b27cc623e01be9de1580eaa913508b237a7a9673 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 93548ed6c90d68b5a1cd8986fb29d8abc47e625232df1f3cf4c95a6f278ce1ce all runs: crashed: divide error in bch2_sb_members_v2_to_text representative crash: divide error in bch2_sb_members_v2_to_text, types: [UNKNOWN] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP HANG], they are not needed testing commit b27cc623e01be9de1580eaa913508b237a7a9673 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 3db79a0b7a65ed3b89695d50ba7e25487d0bc6a4a3335ee5d0772fdfd309e78f all runs: crashed: divide error in bch2_sb_members_v2_to_text representative crash: divide error in bch2_sb_members_v2_to_text, types: [UNKNOWN] the chunk can be dropped minimized to 427 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_MRRM 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_ENABLE_THP_MIGRATION ARCH_HAS_USER_SHADOW_STACK ARCH_SUPPORTS_HUGE_PFNMAP ARCH_SUPPORTS_PMD_PFNMAP ARCH_SUPPORTS_PUD_PFNMAP 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_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_DEV_ZONED 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_NF_EBTABLES_LEGACY 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 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 CLOSURES CLS_U32_MARK CLS_U32_PERF CMA CMA_SIZE_SEL_MAX 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 CRC64 CRC64_ARCH CRC8 CRC_CCITT 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_ARCH_HAVE_LIB_SHA256 CRYPTO_ARCH_HAVE_LIB_SHA256_SIMD 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_SHA256_GENERIC 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_SHA1_SSSE3 CRYPTO_SHA256_X86_64 CRYPTO_SHA512_SSSE3 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 DAX DCA DCB DEBUG_VFS DEFAULT_CODEL DEVICE_MIGRATION DEVICE_PRIVATE DEV_COREDUMP DEV_DAX DLN2_ADC DMABUF_HEAPS DMABUF_HEAPS_CMA DMABUF_HEAPS_SYSTEM DMABUF_MOVE_NOTIFY DMA_CMA DMA_ENGINE_RAID DM_AUDIT 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_AUX_BRIDGE DRM_BOCHS DRM_BRIDGE DRM_BUDDY DRM_CIRRUS_QEMU DRM_CLIENT DRM_CLIENT_DEFAULT_FBDEV DRM_CLIENT_LIB DRM_CLIENT_SELECTION DRM_CLIENT_SETUP DRM_DEBUG_MM DRM_DISPLAY_DP_AUX_BUS DRM_DISPLAY_DP_HELPER DRM_DISPLAY_HELPER DRM_FBDEV_EMULATION ENCRYPTED_KEYS FSCACHE FUSE_FS GPIOLIB HAMRADIO HID_DRAGONRISE IIO INFINIBAND INFINIBAND_ADDR_TRANS INFINIBAND_RTRS_CLIENT IOSCHED_BFQ LIBNVDIMM MAC80211 MAC80211_DEBUGFS MAC80211_LEDS MEDIA_SUPPORT MEMORY_HOTPLUG MEMORY_HOTREMOVE MFD_DLN2 MMC MTD NET_CLS_U32 NET_SCH_DEFAULT PARTITION_ADVANCED RFKILL SERIAL_DEV_BUS TLS TLS_DEVICE TRANSPARENT_HUGEPAGE TRUSTED_KEYS USB_GADGET USB_PHY VLAN_8021Q WANT_COMPAT_NETLINK_MESSAGES WEXT_CORE WIRELESS WLAN WLAN_VENDOR_ATH ZONE_DEVICE] disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN LOCKDEP], they are not needed picked [v6.15 v6.14 v6.13 v6.11 v6.9 v6.7 v6.5 v6.3 v6.0 v5.17 v5.14 v5.11 v5.8 v5.5 v5.2 v4.20 v4.19] out of 38 release tags testing release v6.15 testing commit 0ff41df1cb268fc69e703a08a57ee14ae967d0ca gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: f49430e958960caecc814376cf246eb308a7dee7325b188a1cf6abd68a82deda all runs: OK false negative chance: 0.000 # git bisect start b27cc623e01be9de1580eaa913508b237a7a9673 0ff41df1cb268fc69e703a08a57ee14ae967d0ca Bisecting: 7428 revisions left to test after this (roughly 13 steps) [1b98f357dadd6ea613a435fbaef1a5dd7b35fd21] Merge tag 'net-next-6.16' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next testing commit 1b98f357dadd6ea613a435fbaef1a5dd7b35fd21 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: c3f27ecacffe57c14f49cfeefaa9a10565365c26f5994687bd26ce316785108d all runs: OK false negative chance: 0.000 # git bisect good 1b98f357dadd6ea613a435fbaef1a5dd7b35fd21 Bisecting: 3719 revisions left to test after this (roughly 12 steps) [1486a0d1733a4b5d003d99b695916c9859add36a] Merge branch 'for-6.17' into for-next testing commit 1486a0d1733a4b5d003d99b695916c9859add36a gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: e6ff7f6248c40c50092039311e8bfdf1347df5a24859338abbd044fc090a5990 all runs: OK false negative chance: 0.000 # git bisect good 1486a0d1733a4b5d003d99b695916c9859add36a Bisecting: 1849 revisions left to test after this (roughly 11 steps) [c26f4fbd58375bd6ef74f95eb73d61762ad97c59] Merge tag 'char-misc-6.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc testing commit c26f4fbd58375bd6ef74f95eb73d61762ad97c59 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 0005155337392c17f6bfb3c94da443ddaddb6b9673b66f59ce8935cbf7f50566 all runs: OK false negative chance: 0.000 # git bisect good c26f4fbd58375bd6ef74f95eb73d61762ad97c59 Bisecting: 921 revisions left to test after this (roughly 10 steps) [2118f6daccbaac3ccbfedb25bf4ac1a467ee1203] Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip.git testing commit 2118f6daccbaac3ccbfedb25bf4ac1a467ee1203 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: ed6ff33fb00b714a31027d1ea79ca5ca13293a3670fc6e76796a7c7d40e38cca all runs: OK false negative chance: 0.000 # git bisect good 2118f6daccbaac3ccbfedb25bf4ac1a467ee1203 Bisecting: 467 revisions left to test after this (roughly 9 steps) [cdaad016491d7631ae08ead5515e25277b3355a4] Merge branch 'for-linux-next' of https://gitlab.freedesktop.org/drm/i915/kernel testing commit cdaad016491d7631ae08ead5515e25277b3355a4 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 3b66350b021b4b2925856aa0a7080aeadaee046c7e9daff629a07f8a67e3d534 all runs: crashed: divide error in bch2_sb_members_v2_to_text representative crash: divide error in bch2_sb_members_v2_to_text, types: [UNKNOWN] # git bisect bad cdaad016491d7631ae08ead5515e25277b3355a4 Bisecting: 238 revisions left to test after this (roughly 8 steps) [3fd7ed82d5c1bea43b9517a5a3cb74d8d156ab90] Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid.git testing commit 3fd7ed82d5c1bea43b9517a5a3cb74d8d156ab90 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: e02bb9d5c93b6a9857cd98056856026c3e477964acc63723c8dc9bbe09d308b3 all runs: crashed: divide error in bch2_sb_members_v2_to_text representative crash: divide error in bch2_sb_members_v2_to_text, types: [UNKNOWN] # git bisect bad 3fd7ed82d5c1bea43b9517a5a3cb74d8d156ab90 Bisecting: 90 revisions left to test after this (roughly 7 steps) [9948fb66ad37307baa10c95fe2e9f3260c85d4b4] Merge branch 'fs-next' of linux-next testing commit 9948fb66ad37307baa10c95fe2e9f3260c85d4b4 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 27d98bf996ca668935b264bf740ad90ec1ca0be3e37c4b6b97394753883efc59 all runs: crashed: divide error in bch2_sb_members_v2_to_text representative crash: divide error in bch2_sb_members_v2_to_text, types: [UNKNOWN] # git bisect bad 9948fb66ad37307baa10c95fe2e9f3260c85d4b4 Bisecting: 61 revisions left to test after this (roughly 6 steps) [79afff47c31e2c4c91fe3ed0028cd9e67cbfab20] Merge branch 'xtensa-for-next' of git://github.com/jcmvbkbc/linux-xtensa.git testing commit 79afff47c31e2c4c91fe3ed0028cd9e67cbfab20 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 8c3f9a6d8842f3e87f44635b84ff086ac27f51973a2aeb1f2d24e9ff439b26f9 all runs: OK false negative chance: 0.000 # git bisect good 79afff47c31e2c4c91fe3ed0028cd9e67cbfab20 Bisecting: 29 revisions left to test after this (roughly 5 steps) [4d22e676ae238630cd17efcca935136798ce7d79] Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/tyhicks/ecryptfs.git testing commit 4d22e676ae238630cd17efcca935136798ce7d79 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 6b909dd67d400d2e732dce551cbffe8aed254801651abe3cb09aaacb80c082e0 all runs: crashed: divide error in bch2_sb_members_v2_to_text representative crash: divide error in bch2_sb_members_v2_to_text, types: [UNKNOWN] # git bisect bad 4d22e676ae238630cd17efcca935136798ce7d79 Bisecting: 15 revisions left to test after this (roughly 4 steps) [9ff0d4b854343d4df14fb7048113f4d6a13decf3] bcachefs: Fix rcu_pending for PREEMPT_RT testing commit 9ff0d4b854343d4df14fb7048113f4d6a13decf3 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: eb4ece917c2cb276761cfdc9715ba3ca54bf67f7c12b62c2264055bf63479d99 all runs: crashed: divide error in bch2_sb_members_v2_to_text representative crash: divide error in bch2_sb_members_v2_to_text, types: [UNKNOWN] # git bisect bad 9ff0d4b854343d4df14fb7048113f4d6a13decf3 Bisecting: 7 revisions left to test after this (roughly 3 steps) [dcdbdde2414e0c71f05f2184ff33878cc2554da3] bcachefs: Read error message now prints if self healing testing commit dcdbdde2414e0c71f05f2184ff33878cc2554da3 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: da04d727fc859ecf9155cf1b783e88add4e39a2983ff93b95722741a917f8ab3 all runs: OK false negative chance: 0.000 # git bisect good dcdbdde2414e0c71f05f2184ff33878cc2554da3 Bisecting: 3 revisions left to test after this (roughly 2 steps) [a5d36cc5a52a276c434fe5fb63d34dc486b3638e] bcachefs: Make sure opts.read_only gets propagated back to VFS testing commit a5d36cc5a52a276c434fe5fb63d34dc486b3638e gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 6c5b73652fe184019426c9a9703c9d8f990a906f548d76b397b14acd37d2999b all runs: OK false negative chance: 0.000 # git bisect good a5d36cc5a52a276c434fe5fb63d34dc486b3638e Bisecting: 1 revision left to test after this (roughly 1 step) [504780cb0c29e826f99530a28bbbce4ec444d431] bcachefs: Don't put rhashtable on stack testing commit 504780cb0c29e826f99530a28bbbce4ec444d431 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 2bf9a17224ed6dccc46636ed56f9c9e406f641a3f3992b9686a8cf35ffa4a321 all runs: crashed: divide error in bch2_sb_members_v2_to_text representative crash: divide error in bch2_sb_members_v2_to_text, types: [UNKNOWN] # git bisect bad 504780cb0c29e826f99530a28bbbce4ec444d431 Bisecting: 0 revisions left to test after this (roughly 0 steps) [c5ae261c8095a37174e17eb13c5485cbd1b3bb20] bcachefs: Don't trust sb->nr_devices in members_to_text() testing commit c5ae261c8095a37174e17eb13c5485cbd1b3bb20 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 530e9059f2a02cabe151a3b135a8fbf23e6d88961bac51259a11b7cd5a8e0d8f all runs: crashed: divide error in bch2_sb_members_v2_to_text representative crash: divide error in bch2_sb_members_v2_to_text, types: [UNKNOWN] # git bisect bad c5ae261c8095a37174e17eb13c5485cbd1b3bb20 c5ae261c8095a37174e17eb13c5485cbd1b3bb20 is the first bad commit commit c5ae261c8095a37174e17eb13c5485cbd1b3bb20 Author: Kent Overstreet Date: Sun Jun 8 11:31:23 2025 -0400 bcachefs: Don't trust sb->nr_devices in members_to_text() We have to be able to print superblock sections even if they fail to validate (for debugging), so we have to calculate the number of entries from the field size. Reported-by: syzbot+5138f00559ffb3cb3610@syzkaller.appspotmail.com Signed-off-by: Kent Overstreet fs/bcachefs/sb-members.c | 19 +++++++++++++++---- 1 file changed, 15 insertions(+), 4 deletions(-) accumulated error probability: 0.00 culprit signature: 530e9059f2a02cabe151a3b135a8fbf23e6d88961bac51259a11b7cd5a8e0d8f parent signature: 6c5b73652fe184019426c9a9703c9d8f990a906f548d76b397b14acd37d2999b revisions tested: 22, total time: 9h26m42.074399274s (build: 6h28m22.928419653s, test: 2h27m50.168193995s) first bad commit: c5ae261c8095a37174e17eb13c5485cbd1b3bb20 bcachefs: Don't trust sb->nr_devices in members_to_text() recipients (to): ["kent.overstreet@linux.dev" "kent.overstreet@linux.dev" "linux-bcachefs@vger.kernel.org"] recipients (cc): ["linux-kernel@vger.kernel.org"] crash: divide error in bch2_sb_members_v2_to_text loop2: detected capacity change from 0 to 32768 ======================================================= WARNING: The mand mount option has been deprecated and and is ignored by this kernel. Remove the mand option from the mount to silence this warning. ======================================================= Oops: divide error: 0000 [#1] SMP PTI CPU: 1 UID: 0 PID: 3359 Comm: syz.2.16 Not tainted 6.15.0-rc4-syzkaller #0 PREEMPT(undef) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:bch2_sb_members_v2_to_text+0x5c/0x170 fs/bcachefs/sb-members.c:347 Code: 05 00 00 00 e8 b5 d8 01 00 48 89 c1 41 8b 06 49 8d 04 c6 48 29 c8 48 83 c0 f8 41 0f b7 4e 08 48 89 c2 48 c1 ea 20 74 0a 48 99 <48> f7 f9 49 89 c4 eb 07 31 d2 f7 f1 41 89 c4 41 0f b6 4f 7b 41 39 RSP: 0018:ffffc9000329b5a8 EFLAGS: 00010a06 RAX: ffff88810eff4368 RBX: ffffc9000329b918 RCX: 0000000000000000 RDX: ffffffffffffffff RSI: 0000000000000005 RDI: ffff88810eff4000 RBP: 0000000000000000 R08: 000000000000003a R09: 000000000000003a R10: 0000000000000000 R11: ffffffff81c310e0 R12: 00000000fffff6fa R13: 000000000000000b R14: ffff88810eff4330 R15: ffff88810eff4000 FS: 00007f201b42a6c0(0000) GS:ffff8882b32da000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f201a571d60 CR3: 000000010dfb0000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: bch2_sb_field_validate+0xbc/0x100 fs/bcachefs/super-io.c:1380 bch2_sb_validate+0x5b9/0x690 fs/bcachefs/super-io.c:552 __bch2_read_super+0x505/0x530 fs/bcachefs/super-io.c:925 bch2_fs_open+0x144/0x500 fs/bcachefs/super.c:2383 bch2_fs_get_tree+0x22c/0x760 fs/bcachefs/fs.c:2473 vfs_get_tree+0x26/0xb0 fs/super.c:1759 do_new_mount+0x13f/0x380 fs/namespace.c:3884 do_mount fs/namespace.c:4224 [inline] __do_sys_mount fs/namespace.c:4435 [inline] __se_sys_mount+0x147/0x1b0 fs/namespace.c:4412 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x8f/0x170 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f201a5900ca 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:00007f201b429e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f201b429ef0 RCX: 00007f201a5900ca RDX: 0000200000000000 RSI: 0000200000011a40 RDI: 00007f201b429eb0 RBP: 0000200000000000 R08: 00007f201b429ef0 R09: 00000000028080c9 R10: 00000000028080c9 R11: 0000000000000246 R12: 0000200000011a40 R13: 00007f201b429eb0 R14: 00000000000119f9 R15: 0000200000013d00 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:bch2_sb_members_v2_to_text+0x5c/0x170 fs/bcachefs/sb-members.c:347 Code: 05 00 00 00 e8 b5 d8 01 00 48 89 c1 41 8b 06 49 8d 04 c6 48 29 c8 48 83 c0 f8 41 0f b7 4e 08 48 89 c2 48 c1 ea 20 74 0a 48 99 <48> f7 f9 49 89 c4 eb 07 31 d2 f7 f1 41 89 c4 41 0f b6 4f 7b 41 39 RSP: 0018:ffffc9000329b5a8 EFLAGS: 00010a06 RAX: ffff88810eff4368 RBX: ffffc9000329b918 RCX: 0000000000000000 RDX: ffffffffffffffff RSI: 0000000000000005 RDI: ffff88810eff4000 RBP: 0000000000000000 R08: 000000000000003a R09: 000000000000003a R10: 0000000000000000 R11: ffffffff81c310e0 R12: 00000000fffff6fa R13: 000000000000000b R14: ffff88810eff4330 R15: ffff88810eff4000 FS: 00007f201b42a6c0(0000) GS:ffff8882b32da000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f201a571d60 CR3: 000000010dfb0000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 05 00 00 00 e8 add $0xe8000000,%eax 5: b5 d8 mov $0xd8,%ch 7: 01 00 add %eax,(%rax) 9: 48 89 c1 mov %rax,%rcx c: 41 8b 06 mov (%r14),%eax f: 49 8d 04 c6 lea (%r14,%rax,8),%rax 13: 48 29 c8 sub %rcx,%rax 16: 48 83 c0 f8 add $0xfffffffffffffff8,%rax 1a: 41 0f b7 4e 08 movzwl 0x8(%r14),%ecx 1f: 48 89 c2 mov %rax,%rdx 22: 48 c1 ea 20 shr $0x20,%rdx 26: 74 0a je 0x32 28: 48 99 cqto * 2a: 48 f7 f9 idiv %rcx <-- trapping instruction 2d: 49 89 c4 mov %rax,%r12 30: eb 07 jmp 0x39 32: 31 d2 xor %edx,%edx 34: f7 f1 div %ecx 36: 41 89 c4 mov %eax,%r12d 39: 41 0f b6 4f 7b movzbl 0x7b(%r15),%ecx 3e: 41 rex.B 3f: 39 .byte 0x39