ci starts bisection 2025-09-21 03:04:56.751709495 +0000 UTC m=+139129.665350314 bisecting cause commit starting from 097a6c336d0080725c626fda118ecfec448acd0f building syzkaller on 67c375600e44473aafff4ce6ff7abb90e4f4fff4 ensuring issue is reproducible on original commit 097a6c336d0080725c626fda118ecfec448acd0f testing commit 097a6c336d0080725c626fda118ecfec448acd0f gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 7e4b0833f826967692d83dc3cf9d81d1e0bbf07e68f9bd4192c9a10282dcb428 run #0: crashed: WARNING in bdev_getblk run #1: crashed: WARNING in bdev_getblk run #2: crashed: WARNING in bdev_getblk run #3: crashed: WARNING in bdev_getblk run #4: crashed: WARNING in bdev_getblk run #5: crashed: WARNING in bdev_getblk run #6: crashed: WARNING in bdev_getblk run #7: crashed: WARNING in bdev_getblk run #8: crashed: WARNING in bdev_getblk run #9: crashed: WARNING in bdev_getblk run #10: crashed: WARNING in bdev_getblk run #11: crashed: WARNING in bdev_getblk run #12: crashed: WARNING in bdev_getblk run #13: crashed: WARNING in bdev_getblk run #14: crashed: WARNING in bdev_getblk run #15: crashed: WARNING in bdev_getblk run #16: crashed: INFO: task hung in queue_limits_commit_update_frozen run #17: crashed: INFO: task hung in queue_limits_commit_update_frozen run #18: crashed: INFO: task hung in queue_limits_commit_update_frozen run #19: crashed: INFO: task hung in queue_limits_commit_update_frozen representative crash: WARNING in bdev_getblk, types: [WARNING] check whether we can drop unnecessary instrumentation disabling configs for [kasan locking atomic_sleep hang memleak ubsan], they are not needed testing commit 097a6c336d0080725c626fda118ecfec448acd0f gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 816950cb309d8731affc6a2e716585b7c3e5c0bec494f3994add9f84a580e1ab run #0: crashed: WARNING in bdev_getblk run #1: crashed: WARNING in bdev_getblk run #2: crashed: WARNING in bdev_getblk run #3: crashed: WARNING in bdev_getblk run #4: crashed: WARNING in bdev_getblk run #5: crashed: WARNING in bdev_getblk run #6: crashed: WARNING in bdev_getblk run #7: crashed: WARNING in bdev_getblk run #8: crashed: no output from test machine run #9: crashed: no output from test machine representative crash: WARNING in bdev_getblk, types: [WARNING] the bug reproduces without the instrumentation disabling configs for [kasan locking atomic_sleep hang memleak ubsan], they are not needed kconfig minimization: base=4099 full=8510 leaves diff=2194 split chunks (needed=false): <2194> split chunk #0 of len 2194 into 5 parts testing without sub-chunk 1/5 disabling configs for [hang memleak ubsan kasan locking atomic_sleep], they are not needed testing commit 097a6c336d0080725c626fda118ecfec448acd0f gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: a0ea74d0fdfb2155a311b5be5a4643ee2d25d69d54ffea68f138421ba568a955 all runs: OK false negative chance: 0.000 testing without sub-chunk 2/5 disabling configs for [locking atomic_sleep hang memleak ubsan kasan], they are not needed testing commit 097a6c336d0080725c626fda118ecfec448acd0f gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 4c325297eebbf12e1d1d0bf4fdb73f8984910ff0bf33c68b073260dbec075aaa run #0: crashed: WARNING in bdev_getblk run #1: crashed: WARNING in bdev_getblk run #2: crashed: WARNING in bdev_getblk run #3: crashed: WARNING in bdev_getblk run #4: crashed: WARNING in bdev_getblk run #5: crashed: WARNING in bdev_getblk run #6: crashed: WARNING in bdev_getblk run #7: crashed: WARNING in bdev_getblk run #8: crashed: WARNING in bdev_getblk run #9: crashed: no output from test machine representative crash: WARNING in bdev_getblk, types: [WARNING] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [locking atomic_sleep hang memleak ubsan kasan], they are not needed testing commit 097a6c336d0080725c626fda118ecfec448acd0f gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 1065098a50937c7a5c9c514e43b66c9f7c841507d2c617a4bcfc8f6502aaca4b run #0: crashed: WARNING in bdev_getblk run #1: crashed: WARNING in bdev_getblk run #2: crashed: WARNING in bdev_getblk run #3: crashed: WARNING in bdev_getblk run #4: crashed: WARNING in bdev_getblk run #5: crashed: WARNING in bdev_getblk run #6: crashed: WARNING in bdev_getblk run #7: crashed: WARNING in bdev_getblk run #8: crashed: WARNING in bdev_getblk run #9: crashed: no output from test machine representative crash: WARNING in bdev_getblk, types: [WARNING] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [atomic_sleep hang memleak ubsan kasan locking], they are not needed testing commit 097a6c336d0080725c626fda118ecfec448acd0f gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 7fbfab430c972cb2058414353374d58612f941ad2e5ed811986c65d272bc9aa0 all runs: crashed: BUG: MAX_LOCKDEP_KEYS too low! representative crash: BUG: MAX_LOCKDEP_KEYS too low!, types: [UNKNOWN] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [memleak ubsan kasan locking atomic_sleep hang], they are not needed testing commit 097a6c336d0080725c626fda118ecfec448acd0f gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: c4ebd4741dfe8e04daf95f0b712e098ecda4f70ed2cc6c07277db81a20c2b214 all runs: crashed: BUG: MAX_LOCKDEP_KEYS too low! representative crash: BUG: MAX_LOCKDEP_KEYS too low!, types: [UNKNOWN] the chunk can be dropped minimized to 439 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_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_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 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_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_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 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 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] disabling configs for [ubsan kasan 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: 2f0cb9cdb3f7a9d2a8c055671a396e431160a60db6c27ca046ad6e519f3a0206 all runs: crashed: BUG: MAX_LOCKDEP_KEYS too low! representative crash: BUG: MAX_LOCKDEP_KEYS too low!, types: [UNKNOWN] 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: dff38008f04764bc53b0190e1c0d238f0eec76c63c9e3da8c19faa9f0a5a861e all runs: crashed: BUG: MAX_LOCKDEP_KEYS too low! representative crash: BUG: MAX_LOCKDEP_KEYS too low!, types: [UNKNOWN] 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: f803496ef455d27c1434ebc2045a2a56fc466b58d47d72544df2fb69a6744c81 all runs: crashed: BUG: MAX_LOCKDEP_KEYS too low! representative crash: BUG: MAX_LOCKDEP_KEYS too low!, types: [UNKNOWN] 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: 16946583501d43110d5fce964fd743267434126f35cee8b981b4153250170d58 all runs: OK false negative chance: 0.000 # git bisect start 38fec10eb60d687e30c8c6b5420d86e8149f7557 adc218676eef25575469234709c2d87185ca223a Bisecting: 13139 revisions left to test after this (roughly 14 steps) [af215c980c1fbf1ca01675b128b0dd194745b880] Merge tag 'drm-fixes-2024-12-20' of https://gitlab.freedesktop.org/drm/kernel testing commit af215c980c1fbf1ca01675b128b0dd194745b880 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 639b220727bf1dc03b9aa852e8df5b90cbaf4f4a2ad509dc99138de1844a5fe9 all runs: crashed: BUG: MAX_LOCKDEP_KEYS too low! representative crash: BUG: MAX_LOCKDEP_KEYS too low!, types: [UNKNOWN] # git bisect bad af215c980c1fbf1ca01675b128b0dd194745b880 Bisecting: 7011 revisions left to test after this (roughly 13 steps) [071b34dcf71523a559b6c39f5d21a268a9531b50] Merge tag 'sound-6.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound testing commit 071b34dcf71523a559b6c39f5d21a268a9531b50 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 086cc44e731b88d18412dcd267b6e3b2c8e453f268d8e895f3528351b3a8c4d5 all runs: crashed: BUG: MAX_LOCKDEP_KEYS too low! representative crash: BUG: MAX_LOCKDEP_KEYS too low!, types: [UNKNOWN] # git bisect bad 071b34dcf71523a559b6c39f5d21a268a9531b50 Bisecting: 3384 revisions left to test after this (roughly 12 steps) [79caa6c88ac484111b24488eb9fe1c86a3d18016] Merge tag 'asm-generic-3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic testing commit 79caa6c88ac484111b24488eb9fe1c86a3d18016 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: f948ebc23c8c207d77b691b437f514538e10f120b92161ee8ae2d874ceaa6d83 all runs: crashed: BUG: MAX_LOCKDEP_KEYS too low! representative crash: BUG: MAX_LOCKDEP_KEYS too low!, types: [UNKNOWN] # git bisect bad 79caa6c88ac484111b24488eb9fe1c86a3d18016 Bisecting: 1373 revisions left to test after this (roughly 11 steps) [c1f2ffe207a23b52d58923b1b34c2fd3d1b30494] Merge tag 'ras_core_for_v6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip testing commit c1f2ffe207a23b52d58923b1b34c2fd3d1b30494 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 1d586d4af6b4724e51f919e26b357b720fe836b48ab46fd8796203f8973e6123 all runs: crashed: BUG: MAX_LOCKDEP_KEYS too low! representative crash: BUG: MAX_LOCKDEP_KEYS too low!, types: [UNKNOWN] # git bisect bad c1f2ffe207a23b52d58923b1b34c2fd3d1b30494 Bisecting: 737 revisions left to test after this (roughly 10 steps) [5591fd5e034819a89ac93c0ccc6be2a930042f71] Merge tag 'lsm-pr-20241112' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/lsm testing commit 5591fd5e034819a89ac93c0ccc6be2a930042f71 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 597ad22e09266856548688f52d0db0b1e53c1780f3b7c831b2efa225e944b20e all runs: crashed: BUG: MAX_LOCKDEP_KEYS too low! representative crash: BUG: MAX_LOCKDEP_KEYS too low!, types: [UNKNOWN] # git bisect bad 5591fd5e034819a89ac93c0ccc6be2a930042f71 Bisecting: 359 revisions left to test after this (roughly 8 steps) [3e7447ab48d101353c3e5be29e6ff0d322fa5a95] Merge tag 'ext4_for_linus-6.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 testing commit 3e7447ab48d101353c3e5be29e6ff0d322fa5a95 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: cbc6e5e27bf5961aa770b1eafed552b9c1183b6442354ce6211d3dcc4742b152 all runs: OK false negative chance: 0.000 # git bisect good 3e7447ab48d101353c3e5be29e6ff0d322fa5a95 Bisecting: 227 revisions left to test after this (roughly 8 steps) [3d1b536c13f7cd966aa660d1730855b26d01c9ae] Merge tag 'ata-6.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/libata/linux testing commit 3d1b536c13f7cd966aa660d1730855b26d01c9ae gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 9305710567260fa3c33ab79fba5c2d01aa05283a5bb088cfb38aae0bcd34eb3d all runs: OK false negative chance: 0.000 # git bisect good 3d1b536c13f7cd966aa660d1730855b26d01c9ae Bisecting: 113 revisions left to test after this (roughly 7 steps) [7f212e997edbb7a2cb85cef2ac14265dfaf88717] virtio_blk: reverse request order in virtio_queue_rqs testing commit 7f212e997edbb7a2cb85cef2ac14265dfaf88717 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 1d4791456ca4ba4b84eff4e56bae256063019982c4e533496e873de23b4932d2 all runs: crashed: BUG: MAX_LOCKDEP_KEYS too low! representative crash: BUG: MAX_LOCKDEP_KEYS too low!, types: [UNKNOWN] # git bisect bad 7f212e997edbb7a2cb85cef2ac14265dfaf88717 Bisecting: 57 revisions left to test after this (roughly 6 steps) [6012169e8aae9c0eda38bbedcd7a1540a81220ae] md/md-bitmap: Add missing destroy_work_on_stack() testing commit 6012169e8aae9c0eda38bbedcd7a1540a81220ae gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 3a3e7c1c4fb9ab81e21fb57cd4282a3996e4323f492e7665adca4f58b27d3f25 all runs: crashed: BUG: MAX_LOCKDEP_KEYS too low! representative crash: BUG: MAX_LOCKDEP_KEYS too low!, types: [UNKNOWN] # git bisect bad 6012169e8aae9c0eda38bbedcd7a1540a81220ae Bisecting: 27 revisions left to test after this (roughly 5 steps) [fdad1a20cd57bff65539d971c0ec74faf2b5b2fc] Merge branch 'for-6.13/block-atomic' into for-6.13/block testing commit fdad1a20cd57bff65539d971c0ec74faf2b5b2fc gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 3db845ae73bebbfda948dadb532e292f4b6edf3250027601bee44b007db1fadc all runs: OK false negative chance: 0.000 # git bisect good fdad1a20cd57bff65539d971c0ec74faf2b5b2fc Bisecting: 13 revisions left to test after this (roughly 4 steps) [f187b9bf1a639090893c31030ddb60f9beae23f0] block: remove bio_add_zone_append_page testing commit f187b9bf1a639090893c31030ddb60f9beae23f0 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 5f0cc8e13b8ef83f92052ee5ac6fd8fc17149cb676279b1a68dac6803cd2039f all runs: crashed: BUG: MAX_LOCKDEP_KEYS too low! representative crash: BUG: MAX_LOCKDEP_KEYS too low!, types: [UNKNOWN] # git bisect bad f187b9bf1a639090893c31030ddb60f9beae23f0 Bisecting: 6 revisions left to test after this (roughly 3 steps) [e4e535bff2bc82bb49a633775f9834beeaa527db] iov_iter: don't require contiguous pages in iov_iter_extract_bvec_pages testing commit e4e535bff2bc82bb49a633775f9834beeaa527db gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: e76c8d9abfe1ba67da0f6bfc53a156f6496e11a5531bacb3eea7f4262e74147c all runs: crashed: BUG: MAX_LOCKDEP_KEYS too low! representative crash: BUG: MAX_LOCKDEP_KEYS too low!, types: [UNKNOWN] # git bisect bad e4e535bff2bc82bb49a633775f9834beeaa527db Bisecting: 3 revisions left to test after this (roughly 2 steps) [e203e20a8b2b67eb12f87aa3ee625cda5e686434] blk-mq: Unexport blk_mq_flush_busy_ctxs() testing commit e203e20a8b2b67eb12f87aa3ee625cda5e686434 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: ba54324e343306be20289b0ec70db7dba719fbc9c719d3b133e0e68a80fb3d1e all runs: OK false negative chance: 0.000 # git bisect good e203e20a8b2b67eb12f87aa3ee625cda5e686434 Bisecting: 1 revision left to test after this (roughly 1 step) [6b6f6c41c8ac9b5ef758f16b793e1fd998cd25b4] nvme: core: switch to non_owner variant of start_freeze/unfreeze queue testing commit 6b6f6c41c8ac9b5ef758f16b793e1fd998cd25b4 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 8aab31572fb5049016046129c11b691f06c4136d972d7aba3b9c4071fcbe97f0 all runs: OK false negative chance: 0.000 # git bisect good 6b6f6c41c8ac9b5ef758f16b793e1fd998cd25b4 Bisecting: 0 revisions left to test after this (roughly 0 steps) [f1be1788a32e8fa63416ad4518bbd1a85a825c9d] block: model freeze & enter queue as lock for supporting lockdep testing commit f1be1788a32e8fa63416ad4518bbd1a85a825c9d gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 8f4b5f9071c5413f6ebedb2d4414dab02f395df5374cc239e38380caf0f35bf3 all runs: crashed: BUG: MAX_LOCKDEP_KEYS too low! representative crash: BUG: MAX_LOCKDEP_KEYS too low!, types: [UNKNOWN] # git bisect bad f1be1788a32e8fa63416ad4518bbd1a85a825c9d f1be1788a32e8fa63416ad4518bbd1a85a825c9d is the first bad commit commit f1be1788a32e8fa63416ad4518bbd1a85a825c9d Author: Ming Lei Date: Fri Oct 25 08:37:20 2024 +0800 block: model freeze & enter queue as lock for supporting lockdep Recently we got several deadlock report[1][2][3] caused by blk_mq_freeze_queue and blk_enter_queue(). Turns out the two are just like acquiring read/write lock, so model them as read/write lock for supporting lockdep: 1) model q->q_usage_counter as two locks(io and queue lock) - queue lock covers sync with blk_enter_queue() - io lock covers sync with bio_enter_queue() 2) make the lockdep class/key as per-queue: - different subsystem has very different lock use pattern, shared lock class causes false positive easily - freeze_queue degrades to no lock in case that disk state becomes DEAD because bio_enter_queue() won't be blocked any more - freeze_queue degrades to no lock in case that request queue becomes dying because blk_enter_queue() won't be blocked any more 3) model blk_mq_freeze_queue() as acquire_exclusive & try_lock - it is exclusive lock, so dependency with blk_enter_queue() is covered - it is trylock because blk_mq_freeze_queue() are allowed to run concurrently 4) model blk_enter_queue() & bio_enter_queue() as acquire_read() - nested blk_enter_queue() are allowed - dependency with blk_mq_freeze_queue() is covered - blk_queue_exit() is often called from other contexts(such as irq), and it can't be annotated as lock_release(), so simply do it in blk_enter_queue(), this way still covered cases as many as possible With lockdep support, such kind of reports may be reported asap and needn't wait until the real deadlock is triggered. For example, lockdep report can be triggered in the report[3] with this patch applied. [1] occasional block layer hang when setting 'echo noop > /sys/block/sda/queue/scheduler' https://bugzilla.kernel.org/show_bug.cgi?id=219166 [2] del_gendisk() vs blk_queue_enter() race condition https://lore.kernel.org/linux-block/20241003085610.GK11458@google.com/ [3] queue_freeze & queue_enter deadlock in scsi https://lore.kernel.org/linux-block/ZxG38G9BuFdBpBHZ@fedora/T/#u Reviewed-by: Christoph Hellwig Signed-off-by: Ming Lei Link: https://lore.kernel.org/r/20241025003722.3630252-4-ming.lei@redhat.com Signed-off-by: Jens Axboe block/blk-core.c | 18 ++++++++++++++++-- block/blk-mq.c | 26 ++++++++++++++++++++++---- block/blk.h | 29 ++++++++++++++++++++++++++--- block/genhd.c | 15 +++++++++++---- include/linux/blkdev.h | 6 ++++++ 5 files changed, 81 insertions(+), 13 deletions(-) accumulated error probability: 0.00 culprit signature: 8f4b5f9071c5413f6ebedb2d4414dab02f395df5374cc239e38380caf0f35bf3 parent signature: 8aab31572fb5049016046129c11b691f06c4136d972d7aba3b9c4071fcbe97f0 revisions tested: 26, total time: 10h25m13.7704152s (build: 5h47m37.97949803s, test: 3h58m29.163148003s) first bad commit: f1be1788a32e8fa63416ad4518bbd1a85a825c9d block: model freeze & enter queue as lock for supporting lockdep recipients (to): ["axboe@kernel.dk" "hch@lst.de" "ming.lei@redhat.com"] recipients (cc): [] crash: BUG: MAX_LOCKDEP_KEYS too low! BUG: MAX_LOCKDEP_KEYS too low! turning off the locking correctness validator. CPU: 0 UID: 0 PID: 15568 Comm: syz.2.2230 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 Call Trace: dump_stack_lvl+0xa4/0xf0 lib/dump_stack.c:120 register_lock_class+0x2de/0x300 kernel/locking/lockdep.c:1328 __lock_acquire+0x5b/0x5e0 kernel/locking/lockdep.c:5077 lock_acquire+0xef/0x270 kernel/locking/lockdep.c:5825 blk_freeze_acquire_lock block/blk.h:738 [inline] blk_freeze_queue_start+0xac/0xc0 block/blk-mq.c:145 blk_freeze_queue block/blk-mq.c:177 [inline] blk_mq_freeze_queue+0xd/0x20 block/blk-mq.c:187 elevator_init_mq+0x74/0xe0 block/elevator.c:602 add_disk_fwnode+0x4d/0x420 block/genhd.c:413 add_disk include/linux/blkdev.h:746 [inline] nbd_dev_add+0x2ce/0x390 drivers/block/nbd.c:1901 nbd_genl_connect+0x1db/0x8c0 drivers/block/nbd.c:2042 genl_family_rcv_msg_doit+0xcc/0x120 net/netlink/genetlink.c:1115 genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline] genl_rcv_msg+0x239/0x250 net/netlink/genetlink.c:1210 netlink_rcv_skb+0xe9/0x120 net/netlink/af_netlink.c:2551 genl_rcv+0x23/0x30 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x1e8/0x310 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x326/0x3d0 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:729 [inline] __sock_sendmsg+0x84/0xa0 net/socket.c:744 ____sys_sendmsg+0x1d0/0x260 net/socket.c:2607 ___sys_sendmsg+0x28a/0x2d0 net/socket.c:2661 __sys_sendmsg net/socket.c:2690 [inline] __do_sys_sendmsg net/socket.c:2699 [inline] __se_sys_sendmsg+0xf2/0x130 net/socket.c:2697 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xe2/0x210 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f3c61b8ec29 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:00007f3c62a81038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f3c61dd5fa0 RCX: 00007f3c61b8ec29 RDX: 0000000000000000 RSI: 0000200000001f40 RDI: 0000000000000004 RBP: 00007f3c61c11e41 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f3c61dd6038 R14: 00007f3c61dd5fa0 R15: 00007ffe39e85a18