ci2 starts bisection 2025-05-27 12:04:28.979777036 +0000 UTC m=+76154.169238323
bisecting cause commit starting from 785cdec46e9227f9433884ed3b436471e944007c
building syzkaller on 874a1386706482fe473dfe96f8a3acc52c1b2ba1
ensuring issue is reproducible on original commit 785cdec46e9227f9433884ed3b436471e944007c

testing commit 785cdec46e9227f9433884ed3b436471e944007c gcc
compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6
kernel signature: 67b39c80049643a512a33ceba30edd7292337ebb8855bd219dc362b8983ecb8e
all runs: crashed: UBSAN: shift-out-of-bounds in __bch2_bkey_unpack_key
representative crash: UBSAN: shift-out-of-bounds in __bch2_bkey_unpack_key, types: [UBSAN]
check whether we can drop unnecessary instrumentation
disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK BUG], they are not needed
testing commit 785cdec46e9227f9433884ed3b436471e944007c gcc
compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6
kernel signature: 82ba18a0907108f48ec6e0de0d8509d930655ff6434bb406424d72231fa188d1
all runs: crashed: UBSAN: shift-out-of-bounds in __bch2_bkey_unpack_key
representative crash: UBSAN: shift-out-of-bounds in __bch2_bkey_unpack_key, types: [UBSAN]
the bug reproduces without the instrumentation
disabling configs for [LEAK BUG KASAN LOCKDEP ATOMIC_SLEEP HANG], they are not needed
kconfig minimization: base=4084 full=8324 leaves diff=2128
split chunks (needed=false): <2128>
split chunk #0 of len 2128 into 5 parts
testing without sub-chunk 1/5
disabling configs for [HANG LEAK BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed
testing commit 785cdec46e9227f9433884ed3b436471e944007c gcc
compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6
kernel signature: 89920b33024de7a9ffe3c72dc61eadf6d5ceb1a9c72a51c42395f34fa9bbf64b
all runs: OK
false negative chance: 0.000
testing without sub-chunk 2/5
disabling configs for [LEAK BUG KASAN LOCKDEP ATOMIC_SLEEP HANG], they are not needed
testing commit 785cdec46e9227f9433884ed3b436471e944007c gcc
compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6
kernel signature: 6a1a552b0806fa2962fed62b76cbea151ae5158ca2230735a0d66f18353866ec
all runs: crashed: UBSAN: shift-out-of-bounds in __bch2_bkey_unpack_key
representative crash: UBSAN: shift-out-of-bounds in __bch2_bkey_unpack_key, types: [UBSAN]
the chunk can be dropped
testing without sub-chunk 3/5
disabling configs for [ATOMIC_SLEEP HANG LEAK BUG KASAN LOCKDEP], they are not needed
testing commit 785cdec46e9227f9433884ed3b436471e944007c gcc
compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6
kernel signature: 5b8818463e1befd40cbdd34628c8ed0e8b401226fee978c846e70c208b179fd4
all runs: crashed: UBSAN: shift-out-of-bounds in __bch2_bkey_unpack_key
representative crash: UBSAN: shift-out-of-bounds in __bch2_bkey_unpack_key, types: [UBSAN]
the chunk can be dropped
testing without sub-chunk 4/5
disabling configs for [BUG KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK], they are not needed
testing commit 785cdec46e9227f9433884ed3b436471e944007c gcc
compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6
kernel signature: 9c68f4e2d2eb6e39782cfaf027f1b565698880a7346febe348566edf5623c64d
all runs: crashed: UBSAN: shift-out-of-bounds in __bch2_bkey_unpack_key
representative crash: UBSAN: shift-out-of-bounds in __bch2_bkey_unpack_key, types: [UBSAN]
the chunk can be dropped
testing without sub-chunk 5/5
disabling configs for [LEAK BUG KASAN LOCKDEP ATOMIC_SLEEP HANG], they are not needed
testing commit 785cdec46e9227f9433884ed3b436471e944007c gcc
compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6
kernel signature: 794f7cb45c8796f1b7cd7ad8b278c119c396b4e3256a2df4d787ad7ee77eefb1
all runs: crashed: UBSAN: shift-out-of-bounds in __bch2_bkey_unpack_key
representative crash: UBSAN: shift-out-of-bounds in __bch2_bkey_unpack_key, types: [UBSAN]
the chunk can be dropped
minimized to 426 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_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_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_DSC_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 [KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK BUG], 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: c485ec732ca39f002aff767220d6949b22c6c37f8b6f7f449abdd6c58e4c2cba
all runs: OK
false negative chance: 0.000
# git bisect start 785cdec46e9227f9433884ed3b436471e944007c 0ff41df1cb268fc69e703a08a57ee14ae967d0ca
Bisecting: 1041 revisions left to test after this (roughly 10 steps)
[15d90a5e5524532b7456a24f4626cf28c1629c4c] Merge tag 'crc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux

testing commit 15d90a5e5524532b7456a24f4626cf28c1629c4c gcc
compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6
kernel signature: baf4a3a82977ba598b3ef9d77a37d97e9ee83a73998acd3d89ad0399a7950e42
all runs: crashed: UBSAN: shift-out-of-bounds in __bch2_bkey_unpack_key
representative crash: UBSAN: shift-out-of-bounds in __bch2_bkey_unpack_key, types: [UBSAN]
# git bisect bad 15d90a5e5524532b7456a24f4626cf28c1629c4c
Bisecting: 507 revisions left to test after this (roughly 9 steps)
[49fffac983ac52aea0ab94914be3f56bcf92d5dc] Merge tag 'for-6.16/io_uring-20250523' of git://git.kernel.dk/linux

testing commit 49fffac983ac52aea0ab94914be3f56bcf92d5dc gcc
compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6
kernel signature: 81fab92785cef9c5eea4cbb52171e09d4383cd30ba3e73775fd9e414b14f43d9
all runs: OK
false negative chance: 0.000
# git bisect good 49fffac983ac52aea0ab94914be3f56bcf92d5dc
Bisecting: 276 revisions left to test after this (roughly 8 steps)
[8fdabcd9c01d9ac585d8109a921e0734a69479fb] Merge tag 'gfs2-for-6.16' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2

testing commit 8fdabcd9c01d9ac585d8109a921e0734a69479fb gcc
compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6
kernel signature: f761e1226aa5a97007ac4d563fea9d87defe8a594d12611cbcaddd8ef9fa49eb
all runs: OK
false negative chance: 0.000
# git bisect good 8fdabcd9c01d9ac585d8109a921e0734a69479fb
Bisecting: 138 revisions left to test after this (roughly 7 steps)
[3b7b0c3996b570f9c305c6f3df475a719920d65c] bcachefs: print label correctly in sb_member_to_text()

testing commit 3b7b0c3996b570f9c305c6f3df475a719920d65c gcc
compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6
kernel signature: 3d50bb08e67209e88f217acebd4b9ff5e1fbb4a8452328ec329f942e6a0bf5fa
all runs: crashed: UBSAN: shift-out-of-bounds in __bch2_bkey_unpack_key
representative crash: UBSAN: shift-out-of-bounds in __bch2_bkey_unpack_key, types: [UBSAN]
# git bisect bad 3b7b0c3996b570f9c305c6f3df475a719920d65c
Bisecting: 68 revisions left to test after this (roughly 6 steps)
[09279bba72f809eeb1f02d39a462e8e1d06fa32a] bcachefs: Kill dead code

testing commit 09279bba72f809eeb1f02d39a462e8e1d06fa32a gcc
compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6
kernel signature: 36b3c731831cfeb3944da5b50571a0b2336ba75fc3a5c05d80b7dc42fb66157f
all runs: OK
false negative chance: 0.000
# git bisect good 09279bba72f809eeb1f02d39a462e8e1d06fa32a
Bisecting: 34 revisions left to test after this (roughly 5 steps)
[8a6b883e78bfed6909e21c2afb6138b603d1ee6c] bcachefs: Fix setting ca->name in device add

testing commit 8a6b883e78bfed6909e21c2afb6138b603d1ee6c gcc
compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6
kernel signature: 9a5420cc0ba5734512949be800713849f627539173b4b707d2c7963f6cea4375
all runs: crashed: UBSAN: shift-out-of-bounds in __bch2_bkey_unpack_key
representative crash: UBSAN: shift-out-of-bounds in __bch2_bkey_unpack_key, types: [UBSAN]
# git bisect bad 8a6b883e78bfed6909e21c2afb6138b603d1ee6c
Bisecting: 16 revisions left to test after this (roughly 4 steps)
[156d9e8341e8aad55b0e79b2dc54003cb14e5077] bcachefs: Emit a single log message on data read error

testing commit 156d9e8341e8aad55b0e79b2dc54003cb14e5077 gcc
compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6
kernel signature: c3a45bad8c212d7ad928a22ea435164897073ef3febfca1fa33c2b12cecfd5fe
run #0: ignore: lost connection to test machine
run #1: OK
run #2: OK
run #3: OK
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
false negative chance: 0.000
# git bisect good 156d9e8341e8aad55b0e79b2dc54003cb14e5077
Bisecting: 8 revisions left to test after this (roughly 3 steps)
[cd3cdb1ef706a1ac725194d81858d58375739b25] bcachefs: Single err message for btree node reads

testing commit cd3cdb1ef706a1ac725194d81858d58375739b25 gcc
compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6
kernel signature: 97a274471fee18c7502d459f8c66e23eff8378abe70adba0eec2e6811c54c0a4
all runs: crashed: UBSAN: shift-out-of-bounds in __bch2_bkey_unpack_key
representative crash: UBSAN: shift-out-of-bounds in __bch2_bkey_unpack_key, types: [UBSAN]
# git bisect bad cd3cdb1ef706a1ac725194d81858d58375739b25
Bisecting: 3 revisions left to test after this (roughly 2 steps)
[300904700f14e4e05db2a16cf8e3890c8e856cf8] bcachefs: kill bch2_run_explicit_recovery_pass_persistent()

testing commit 300904700f14e4e05db2a16cf8e3890c8e856cf8 gcc
compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6
kernel signature: 631e915fcd134fd1d62ea4c1ffb946dcaa46efb5015eadd3d3071f0e2ffecd29
all runs: OK
false negative chance: 0.000
# git bisect good 300904700f14e4e05db2a16cf8e3890c8e856cf8
Bisecting: 1 revision left to test after this (roughly 1 step)
[d31f155964aee6e6141967fc392a9a99b221e117] bcachefs: bch2_fsck_err_opt()

testing commit d31f155964aee6e6141967fc392a9a99b221e117 gcc
compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6
kernel signature: b3c13cf0480c060809b96e1d98ca6c4f6352d252ffb2fdff5da32b72515d5802
all runs: OK
false negative chance: 0.000
# git bisect good d31f155964aee6e6141967fc392a9a99b221e117
Bisecting: 0 revisions left to test after this (roughly 0 steps)
[9c2472658be20d04c6dc34d5314a7e99cc4fed25] bcachefs: bch2_mark_btree_validate_failure()

testing commit 9c2472658be20d04c6dc34d5314a7e99cc4fed25 gcc
compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6
kernel signature: f8d878b2ff9d7a196a0540b8f6c9ed29c2f4457faf30869cdb62b6884915361f
all runs: OK
false negative chance: 0.000
# git bisect good 9c2472658be20d04c6dc34d5314a7e99cc4fed25
cd3cdb1ef706a1ac725194d81858d58375739b25 is the first bad commit
commit cd3cdb1ef706a1ac725194d81858d58375739b25
Author: Kent Overstreet <kent.overstreet@linux.dev>
Date:   Tue Apr 22 09:14:19 2025 -0400

    bcachefs: Single err message for btree node reads
    
    Like we just did with the data read path, emit a single error message
    per btree node reads, nicely formatted, with all the actions we took
    grouped together.
    
    Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

 fs/bcachefs/btree_io.c | 254 ++++++++++++++++++++++++++++---------------------
 fs/bcachefs/btree_io.h |   4 +-
 fs/bcachefs/debug.c    |   4 +-
 3 files changed, 151 insertions(+), 111 deletions(-)

accumulated error probability: 0.00
culprit signature: 97a274471fee18c7502d459f8c66e23eff8378abe70adba0eec2e6811c54c0a4
parent  signature: f8d878b2ff9d7a196a0540b8f6c9ed29c2f4457faf30869cdb62b6884915361f
revisions tested: 19, total time: 4h28m56.749556338s (build: 1h30m10.175760518s, test: 2h42m34.590246687s)
first bad commit: cd3cdb1ef706a1ac725194d81858d58375739b25 bcachefs: Single err message for btree node reads
recipients (to): ["kent.overstreet@linux.dev"]
recipients (cc): []
crash: UBSAN: shift-out-of-bounds in __bch2_bkey_unpack_key
bcachefs (loop2): sb invalid before write: Unsupported superblock version_min 0.0: (unknown version) (min 0.9: (unknown version), max 1.25: extent_flags)
  inconsistency detected - emergency read only at journal seq 10
------------[ cut here ]------------
UBSAN: shift-out-of-bounds in fs/bcachefs/bkey.c:163:16
shift exponent 4294967127 is too large for 64-bit type 'u64' (aka 'unsigned long long')
CPU: 1 UID: 0 PID: 3347 Comm: read_btree_node Not tainted 6.15.0-rc4-syzkaller #0 PREEMPT(undef) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0xa2/0xf0 lib/dump_stack.c:120
 ubsan_epilogue+0x5/0x30 lib/ubsan.c:231
 __ubsan_handle_shift_out_of_bounds+0x202/0x210 lib/ubsan.c:492
 get_inc_field fs/bcachefs/bkey.c:163 [inline]
 __bch2_bkey_unpack_key+0x76f/0x7c0 fs/bcachefs/bkey.c:284
 __bch2_bkey_compat+0x3dd/0x5a0 fs/bcachefs/bkey_methods.c:480
 bch2_bkey_compat fs/bcachefs/bkey_methods.h:134 [inline]
 validate_bset_keys+0x1ee/0x7c0 fs/bcachefs/btree_io.c:983
 bch2_btree_node_read_done+0xb54/0x18a0 fs/bcachefs/btree_io.c:1211
 btree_node_read_work+0x17c/0x4d0 fs/bcachefs/btree_io.c:1400
 bch2_btree_node_read+0xd62/0xe60 fs/bcachefs/btree_io.c:-1
 bch2_btree_node_fill+0x553/0x6e0 fs/bcachefs/btree_cache.c:994
 bch2_btree_node_get_noiter+0x2b0/0x330 fs/bcachefs/btree_cache.c:1261
 found_btree_node_is_readable fs/bcachefs/btree_node_scan.c:85 [inline]
 try_read_btree_node fs/bcachefs/btree_node_scan.c:220 [inline]
 read_btree_nodes_worker+0x729/0xb10 fs/bcachefs/btree_node_scan.c:269
 kthread+0x200/0x230 kernel/kthread.c:464
 ret_from_fork+0x32/0x40 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
---[ end trace ]---