ci starts bisection 2025-09-06 12:46:33.741150971 +0000 UTC m=+205714.628723544 bisecting cause commit starting from be5d4872e528796df9d7425f2bd9b3893eb3a42c building syzkaller on d291dd2d58a1885c00a60561048b6ceb1bf1206a ensuring issue is reproducible on original commit be5d4872e528796df9d7425f2bd9b3893eb3a42c testing commit be5d4872e528796df9d7425f2bd9b3893eb3a42c gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 757ea15fc802d823057b7c9b83686da53bb2605724c02479c235336a3786723f all runs: crashed: KASAN: wild-memory-access Read in md5_update representative crash: KASAN: wild-memory-access Read in md5_update, types: [KASAN-READ] check whether we can drop unnecessary instrumentation disabling configs for [hang memleak ubsan bug_or_warning locking atomic_sleep], they are not needed testing commit be5d4872e528796df9d7425f2bd9b3893eb3a42c gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 2f3a0d2c0f4bdb4f74713a14905e89a2b61d47d8b4422275b54fe7172a1eb065 all runs: crashed: KASAN: wild-memory-access Read in md5_update representative crash: KASAN: wild-memory-access Read in md5_update, types: [KASAN-READ] the bug reproduces without the instrumentation disabling configs for [atomic_sleep hang memleak ubsan bug_or_warning locking], they are not needed kconfig minimization: base=4099 full=8510 leaves diff=2184 split chunks (needed=false): <2184> split chunk #0 of len 2184 into 5 parts testing without sub-chunk 1/5 disabling configs for [hang memleak ubsan bug_or_warning locking atomic_sleep], they are not needed testing commit be5d4872e528796df9d7425f2bd9b3893eb3a42c gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: bd36330ea98e5936ce28534987228cc0060a68645425eecb00e111ce1bcfa7f2 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 be5d4872e528796df9d7425f2bd9b3893eb3a42c gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 95cff858cdc3a3c64905c67149a1245398413b30db966d02453a2642eaf952c8 all runs: crashed: KASAN: wild-memory-access Read in md5_update representative crash: KASAN: wild-memory-access Read in md5_update, types: [KASAN-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 be5d4872e528796df9d7425f2bd9b3893eb3a42c gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: aaefdf0af8c098fd13830532b84d9c1926ed457b48760866ccde4ebabee38b3d all runs: crashed: KASAN: wild-memory-access Read in md5_update representative crash: KASAN: wild-memory-access Read in md5_update, types: [KASAN-READ] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed testing commit be5d4872e528796df9d7425f2bd9b3893eb3a42c gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 32212f775363bf577468230954c84407fb5bb1291d92ce08efde7f9686083ff6 all runs: crashed: KASAN: wild-memory-access Read in md5_update representative crash: KASAN: wild-memory-access Read in md5_update, types: [KASAN-READ] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [hang memleak ubsan bug_or_warning locking atomic_sleep], they are not needed testing commit be5d4872e528796df9d7425f2bd9b3893eb3a42c gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: d0e09c19c9cb5f8e851dd94a52f34ddeb8b86d9b038213e032205f81dcfc888e all runs: crashed: KASAN: wild-memory-access Read in md5_update representative crash: KASAN: wild-memory-access Read in md5_update, types: [KASAN-READ] the chunk can be dropped minimized to 437 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_CPU_ATTACK_VECTORS ARCH_HAS_USER_SHADOW_STACK ARCH_SUPPORTS_HUGETLBFS ARCH_SUPPORTS_HUGE_PFNMAP ARCH_SUPPORTS_PMD_PFNMAP ARCH_SUPPORTS_PUD_PFNMAP ARCH_SUPPORTS_SCHED_CLUSTER ARCH_SUPPORTS_SCHED_MC 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_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 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_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_CURVE25519 CRYPTO_ARIA CRYPTO_ARIA_AESNI_AVX_X86_64 CRYPTO_BLAKE2B 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_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_BLAKE2S_ARCH CRYPTO_LIB_CHACHA CRYPTO_LIB_CHACHA20POLY1305 CRYPTO_LIB_CHACHA_ARCH CRYPTO_LIB_CURVE25519 CRYPTO_LIB_CURVE25519_GENERIC CRYPTO_LIB_CURVE25519_INTERNAL CRYPTO_LIB_DES CRYPTO_LIB_MD5 CRYPTO_LIB_POLY1305 CRYPTO_LIB_POLY1305_ARCH 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_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 DEV_COREDUMP 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 TRANSPARENT_HUGEPAGE 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 memleak ubsan bug_or_warning locking], 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: 37f51b6d8c632706bf5a811c6cc00f8ca1b4c72ea27307f4da58d7e23418e8e7 all runs: OK false negative chance: 0.000 # git bisect start be5d4872e528796df9d7425f2bd9b3893eb3a42c 038d61fd642278bab63ee8ef722c50d10ab01e8f Bisecting: 10101 revisions left to test after this (roughly 13 steps) [99f9a97dce39ad413c39b92c90393bbd6778f3fd] exfat: add cluster chain loop check for dir testing commit 99f9a97dce39ad413c39b92c90393bbd6778f3fd gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 88149a39f1cad96a760907cc9533f442e75a15937355d65db733ccf4fee74aee all runs: OK false negative chance: 0.000 # git bisect good 99f9a97dce39ad413c39b92c90393bbd6778f3fd Bisecting: 5063 revisions left to test after this (roughly 12 steps) [e47de0e885d292af495463a38c3330e3b2d5b72f] Merge branch 'next' of git://git.monstr.eu/linux-2.6-microblaze.git testing commit e47de0e885d292af495463a38c3330e3b2d5b72f gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 170b5da2c0c4f460d3c3f39218eae1c9bfe14adb7c36235f4f6619f327d8e13f all runs: crashed: KASAN: wild-memory-access Read in crypto_shash_finup representative crash: KASAN: wild-memory-access Read in crypto_shash_finup, types: [KASAN-READ] # git bisect bad e47de0e885d292af495463a38c3330e3b2d5b72f Bisecting: 2517 revisions left to test after this (roughly 11 steps) [51f27beeb79f9f92682158999bab489ff4fa16f6] Merge branch 'fixes-on-the-microchip-s-lan865x-driver' testing commit 51f27beeb79f9f92682158999bab489ff4fa16f6 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 6ae69223fd51fa3e6e85fa5158402d86ea1ba2b22be6863bd0bae85b12cdbaec all runs: OK false negative chance: 0.000 # git bisect good 51f27beeb79f9f92682158999bab489ff4fa16f6 Bisecting: 1273 revisions left to test after this (roughly 10 steps) [5fe42852269dc659c8d511864410bd5cf3393e91] Merge branch 'for-linux-next-fixes' of https://gitlab.freedesktop.org/drm/misc/kernel.git testing commit 5fe42852269dc659c8d511864410bd5cf3393e91 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 6dfc36310ebc9b1086cb3470fd6313cd5dea6aa5107556d1fce2f92b6eb2285a all runs: OK false negative chance: 0.000 # git bisect good 5fe42852269dc659c8d511864410bd5cf3393e91 Bisecting: 651 revisions left to test after this (roughly 9 steps) [4e74a3f923a5f7433dde4d5dc14acde1bb76d2c3] Merge branch 'soc_fsl' of https://github.com/chleroy/linux.git testing commit 4e74a3f923a5f7433dde4d5dc14acde1bb76d2c3 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: ab499d17af0e860d57138839786906d6c8f89077f0c50a888bad1da2506a08d1 all runs: crashed: KASAN: wild-memory-access Read in crypto_shash_finup representative crash: KASAN: wild-memory-access Read in crypto_shash_finup, types: [KASAN-READ] # git bisect bad 4e74a3f923a5f7433dde4d5dc14acde1bb76d2c3 Bisecting: 331 revisions left to test after this (roughly 8 steps) [e3b5cbf17d81ec24acd6354220abc27e297a015c] Merge branch 'mm-unstable' of https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm testing commit e3b5cbf17d81ec24acd6354220abc27e297a015c gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 4f9f0346ea63cf8a944a890706b3bc100ad2201559e930fb3918ad0b343e1872 all runs: crashed: KASAN: wild-memory-access Read in crypto_shash_finup representative crash: KASAN: wild-memory-access Read in crypto_shash_finup, types: [KASAN-READ] # git bisect bad e3b5cbf17d81ec24acd6354220abc27e297a015c Bisecting: 144 revisions left to test after this (roughly 7 steps) [4293c71be22eee8ff86c55769cd9a56594e77dd1] mm/filemap: skip non-uptodate folio if there are available folios testing commit 4293c71be22eee8ff86c55769cd9a56594e77dd1 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 35d223e251a7c2e06272a5532f2ca30ffc8958635888d412fefc817bc74d8609 all runs: OK false negative chance: 0.000 # git bisect good 4293c71be22eee8ff86c55769cd9a56594e77dd1 Bisecting: 72 revisions left to test after this (roughly 6 steps) [43449422ee7551f08a6e573ca62131c561b2736e] task_stack.h: clean-up stack_not_used() implementation testing commit 43449422ee7551f08a6e573ca62131c561b2736e gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 8c894f786b277f21aa4e0bc72ddda39777fc8a709bca1f20f5eb32218f90e79a all runs: OK false negative chance: 0.000 # git bisect good 43449422ee7551f08a6e573ca62131c561b2736e Bisecting: 36 revisions left to test after this (roughly 5 steps) [60c71caab37ccc18edb0c722343affdd9bbe51dc] vfio/pci: drop nth_page() usage within SG entry testing commit 60c71caab37ccc18edb0c722343affdd9bbe51dc gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 37f409ee916467c696c7f85be82a6bfcb41d160109d4e62b1667159804688545 all runs: crashed: KASAN: wild-memory-access Read in crypto_shash_finup representative crash: KASAN: wild-memory-access Read in crypto_shash_finup, types: [KASAN-READ] # git bisect bad 60c71caab37ccc18edb0c722343affdd9bbe51dc Bisecting: 17 revisions left to test after this (roughly 4 steps) [55a90aff055ec948685b104c9b27618f3db45981] mm/mm/percpu-km: drop nth_page() usage within single allocation testing commit 55a90aff055ec948685b104c9b27618f3db45981 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: e4e01768cb4fc37909cb4df397707e8bcac39d98fbfe897f19cc6f0a4d87e674 all runs: OK false negative chance: 0.000 # git bisect good 55a90aff055ec948685b104c9b27618f3db45981 Bisecting: 8 revisions left to test after this (roughly 3 steps) [62fd63f4688f40f01a6df23225523ece10d4b69a] dma-remap: drop nth_page() in dma_common_contiguous_remap() testing commit 62fd63f4688f40f01a6df23225523ece10d4b69a gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 5677b4fbac5898ceccf09fe133ca5448833feb91579d32281a25c3162225deea all runs: crashed: KASAN: wild-memory-access Read in crypto_shash_finup representative crash: KASAN: wild-memory-access Read in crypto_shash_finup, types: [KASAN-READ] # git bisect bad 62fd63f4688f40f01a6df23225523ece10d4b69a Bisecting: 4 revisions left to test after this (roughly 2 steps) [21999f6315d786cbd21d5b2d0ad56f3f6125279f] mm/gup: drop nth_page() usage within folio when recording subpages testing commit 21999f6315d786cbd21d5b2d0ad56f3f6125279f gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 0c6eebfd8371a27f5e92359e98b1e1f1f8255155b5ac545890d837497d00cb39 all runs: OK false negative chance: 0.000 # git bisect good 21999f6315d786cbd21d5b2d0ad56f3f6125279f Bisecting: 2 revisions left to test after this (roughly 1 step) [6b4f1539c49f6f2f750a150e863b2597f8e7de87] io_uring/zcrx: remove nth_page() usage within folio testing commit 6b4f1539c49f6f2f750a150e863b2597f8e7de87 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 22011ce11e93e657a88d99abb9a51fc0804c94a5307d3fcbc8273965903bf5f7 all runs: crashed: KASAN: wild-memory-access Read in crypto_shash_finup representative crash: KASAN: wild-memory-access Read in crypto_shash_finup, types: [KASAN-READ] # git bisect bad 6b4f1539c49f6f2f750a150e863b2597f8e7de87 Bisecting: 0 revisions left to test after this (roughly 0 steps) [db076b5db550aa34169dceee81d0974c7b2a2482] mm/gup: remove record_subpages() testing commit db076b5db550aa34169dceee81d0974c7b2a2482 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: acbf93c88a6723fbdae704f14515d8905ab73eb45c21b1f8c78d13e757b13303 all runs: crashed: KASAN: wild-memory-access Read in crypto_shash_finup representative crash: KASAN: wild-memory-access Read in crypto_shash_finup, types: [KASAN-READ] # git bisect bad db076b5db550aa34169dceee81d0974c7b2a2482 db076b5db550aa34169dceee81d0974c7b2a2482 is the first bad commit commit db076b5db550aa34169dceee81d0974c7b2a2482 Author: David Hildenbrand Date: Mon Sep 1 17:03:40 2025 +0200 mm/gup: remove record_subpages() We can just cleanup the code by calculating the #refs earlier, so we can just inline what remains of record_subpages(). Calculate the number of references/pages ahead of times, and record them only once all our tests passed. Link: https://lkml.kernel.org/r/20250901150359.867252-20-david@redhat.com Signed-off-by: David Hildenbrand Signed-off-by: Andrew Morton mm/gup.c | 25 ++++++++----------------- 1 file changed, 8 insertions(+), 17 deletions(-) accumulated error probability: 0.00 culprit signature: acbf93c88a6723fbdae704f14515d8905ab73eb45c21b1f8c78d13e757b13303 parent signature: 0c6eebfd8371a27f5e92359e98b1e1f1f8255155b5ac545890d837497d00cb39 revisions tested: 22, total time: 9h16m18.664510125s (build: 5h50m29.579063189s, test: 2h49m53.208972916s) first bad commit: db076b5db550aa34169dceee81d0974c7b2a2482 mm/gup: remove record_subpages() recipients (to): ["akpm@linux-foundation.org" "david@redhat.com" "linux-kernel@vger.kernel.org"] recipients (cc): ["akpm@linux-foundation.org" "david@redhat.com" "jgg@ziepe.ca" "jhubbard@nvidia.com" "linux-mm@kvack.org" "peterx@redhat.com"] crash: KASAN: wild-memory-access Read in crypto_shash_finup ================================================================== BUG: KASAN: wild-memory-access in crypto_shash_finup+0x2a6/0x640 crypto/shash.c:147 Read of size 36 at addr 0005088000000000 by task syz.2.17/3290 CPU: 1 UID: 0 PID: 3290 Comm: syz.2.17 Not tainted syzkaller #0 PREEMPT(none) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 Call Trace: dump_stack_lvl+0xf4/0x170 lib/dump_stack.c:120 kasan_report+0x118/0x150 mm/kasan/report.c:595 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x2b0/0x2c0 mm/kasan/generic.c:200 __asan_memcpy+0x29/0x70 mm/kasan/shadow.c:105 crypto_shash_finup+0x2a6/0x640 crypto/shash.c:147 crypto_shash_update include/crypto/hash.h:994 [inline] shash_ahash_update+0x1e1/0x2a0 crypto/ahash.c:178 ahash_do_req_chain+0x153/0x5b0 crypto/ahash.c:329 hash_sendmsg+0xa11/0xfa0 crypto/algif_hash.c:149 sock_sendmsg_nosec net/socket.c:714 [inline] __sock_sendmsg+0x1da/0x220 net/socket.c:729 ____sys_sendmsg+0x4ac/0x710 net/socket.c:2614 ___sys_sendmsg+0x1d7/0x250 net/socket.c:2668 __sys_sendmsg net/socket.c:2700 [inline] __do_sys_sendmsg net/socket.c:2705 [inline] __se_sys_sendmsg net/socket.c:2703 [inline] __x64_sys_sendmsg+0x175/0x200 net/socket.c:2703 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x8f/0x250 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f03a5b8ebe9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f03a6ad0038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f03a5dc5fa0 RCX: 00007f03a5b8ebe9 RDX: 000000002404c800 RSI: 0000200000000280 RDI: 0000000000000004 RBP: 00007f03a5c11e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f03a5dc6038 R14: 00007f03a5dc5fa0 R15: 00007ffcbb14b288 ==================================================================