ci starts bisection 2025-06-22 17:14:22.221331092 +0000 UTC m=+146953.642143763 bisecting cause commit starting from e0fca6f2cebff539e9317a15a37dcf432e3b851a building syzkaller on d6cdfb8a765c64793bc63cf630e68fbdd0ee0974 ensuring issue is reproducible on original commit e0fca6f2cebff539e9317a15a37dcf432e3b851a testing commit e0fca6f2cebff539e9317a15a37dcf432e3b851a gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 4ebb1259ddf7c5208af70f097476a5568bae0dc3c39d802fc1c026d8e8d0999a all runs: crashed: possible deadlock in __del_gendisk representative crash: possible deadlock in __del_gendisk, types: [LOCKDEP] check whether we can drop unnecessary instrumentation disabling configs for [KASAN ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed testing commit e0fca6f2cebff539e9317a15a37dcf432e3b851a gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: dbfdd205ce862c73b64ec0f5200e96f7dceb569f8bde06151df8afe22a4ab6be all runs: crashed: possible deadlock in __del_gendisk representative crash: possible deadlock in __del_gendisk, types: [LOCKDEP] the bug reproduces without the instrumentation disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN], they are not needed kconfig minimization: base=4095 full=8363 leaves diff=2126 split chunks (needed=false): <2126> split chunk #0 of len 2126 into 5 parts testing without sub-chunk 1/5 disabling configs for [KASAN ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed testing commit e0fca6f2cebff539e9317a15a37dcf432e3b851a gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 5fa815188f1a2674bf21d641a25023959549e8575677cbaf3c11b81042d66df6 all runs: OK false negative chance: 0.000 testing without sub-chunk 2/5 disabling configs for [KASAN ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed testing commit e0fca6f2cebff539e9317a15a37dcf432e3b851a gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: e38801704361181b51537d1fb11115397e361bdc3d3a9d3b30c2e5edf36f3939 all runs: crashed: possible deadlock in __del_gendisk representative crash: possible deadlock in __del_gendisk, types: [LOCKDEP] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [UBSAN BUG KASAN ATOMIC_SLEEP HANG LEAK], they are not needed testing commit e0fca6f2cebff539e9317a15a37dcf432e3b851a gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 0cc5b2e37344aad1e178bb8217907ed0192d361478c5e9b95a1d86de8588b62a all runs: crashed: possible deadlock in __del_gendisk representative crash: possible deadlock in __del_gendisk, types: [LOCKDEP] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [UBSAN BUG KASAN ATOMIC_SLEEP HANG LEAK], they are not needed testing commit e0fca6f2cebff539e9317a15a37dcf432e3b851a gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: e512bc46ba2aad691af552a7e3b0fa623b5ca001452d6080cea9b494b823ff69 all runs: crashed: possible deadlock in __del_gendisk representative crash: possible deadlock in __del_gendisk, types: [LOCKDEP] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [KASAN ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed testing commit e0fca6f2cebff539e9317a15a37dcf432e3b851a gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: a2380035828fdf776e0d8bc571a81a90942d7c9b22aa01e2a941dcb867c9ca1c all runs: crashed: possible deadlock in __del_gendisk representative crash: possible deadlock in __del_gendisk, types: [LOCKDEP] 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_CRC32 ARCH_HAS_CRC64 ARCH_HAS_CRC_T10DIF 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_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_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_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 [LEAK UBSAN BUG KASAN ATOMIC_SLEEP HANG], 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: 7b670126b586930bfb82907c8d1547803c3b81fc5bfa65a597785abd52520be8 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 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 1d279d78286c75bcfd45e4bd7015231eab8aa8dd74ca07da1b597ff85fbe90cd all runs: crashed: BUG: MAX_LOCKDEP_KEYS too low! representative crash: BUG: MAX_LOCKDEP_KEYS too low!, types: [UNKNOWN] testing release v6.13 testing commit ffd294d346d185b70e28b1a28abe367bbfe53c04 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 857e03e51bd1d298adde24dd5f587c92b72f2fcd55f42c796a5ab5327af1b35b all runs: crashed: BUG: MAX_LOCKDEP_KEYS too low! representative crash: BUG: MAX_LOCKDEP_KEYS too low!, types: [UNKNOWN] testing release v6.11 testing commit 98f7e32f20d28ec452afb208f9cffc08448a2652 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: f1d9952972be63b4982daa375e13fbf6d76828e33120cfb4c6737b5b99d96fc0 all runs: OK false negative chance: 0.000 # git bisect start ffd294d346d185b70e28b1a28abe367bbfe53c04 98f7e32f20d28ec452afb208f9cffc08448a2652 Bisecting: 14399 revisions left to test after this (roughly 14 steps) [a3c1185e931929255003c094a9bd4b7516238d71] Merge branch 'bna-remove-error-checking-for-debugfs-create-apis' testing commit a3c1185e931929255003c094a9bd4b7516238d71 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 8eb7fdc4ec664a4e113290163e2ad638d1a8132ac5e693b2c7fc70c744b4fa22 all runs: OK false negative chance: 0.000 # git bisect good a3c1185e931929255003c094a9bd4b7516238d71 Bisecting: 6418 revisions left to test after this (roughly 13 steps) [28eb75e178d389d325f1666e422bc13bbbb9804c] Merge tag 'drm-next-2024-11-21' of https://gitlab.freedesktop.org/drm/kernel testing commit 28eb75e178d389d325f1666e422bc13bbbb9804c gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 66df356910550f8a46083d8e13f39a5a4cca7eca558f3b3438c7d44d7cd46224 all runs: crashed: BUG: MAX_LOCKDEP_KEYS too low! representative crash: BUG: MAX_LOCKDEP_KEYS too low!, types: [UNKNOWN] # git bisect bad 28eb75e178d389d325f1666e422bc13bbbb9804c Bisecting: 4142 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 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 9235c11a078b17831871cc0544f87029b7eff32fe3306d2d12e6ed6afef8390c all runs: crashed: BUG: MAX_LOCKDEP_KEYS too low! representative crash: BUG: MAX_LOCKDEP_KEYS too low!, types: [UNKNOWN] # git bisect bad 79caa6c88ac484111b24488eb9fe1c86a3d18016 Bisecting: 1952 revisions left to test after this (roughly 11 steps) [9aa4c37f71b9a0a4f51692fbb874888c139805ce] Merge tag 'm68k-for-v6.13-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k testing commit 9aa4c37f71b9a0a4f51692fbb874888c139805ce gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 15aefe5174ec7ee3df9a0cb656450c9f814ce4f34e72cd032303c6fd48da4a8c run #0: crashed: BUG: MAX_LOCKDEP_KEYS too low! run #1: crashed: BUG: MAX_LOCKDEP_KEYS too low! run #2: crashed: BUG: MAX_LOCKDEP_KEYS too low! run #3: crashed: BUG: MAX_LOCKDEP_KEYS too low! run #4: crashed: BUG: MAX_LOCKDEP_KEYS too low! run #5: crashed: BUG: MAX_LOCKDEP_KEYS too low! run #6: crashed: BUG: MAX_LOCKDEP_KEYS too low! run #7: crashed: BUG: MAX_LOCKDEP_KEYS too low! run #8: crashed: BUG: MAX_LOCKDEP_KEYS too low! run #9: OK representative crash: BUG: MAX_LOCKDEP_KEYS too low!, types: [UNKNOWN] # git bisect bad 9aa4c37f71b9a0a4f51692fbb874888c139805ce Bisecting: 942 revisions left to test after this (roughly 10 steps) [2b1ef80d68100a064f94fb2e658881b9f260cf08] btrfs: remove redundant level argument from read_block_for_search() testing commit 2b1ef80d68100a064f94fb2e658881b9f260cf08 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: eb1c76cc2d058368c20a0433749c098087afab37edf4e71258b91393fd4bfbe5 all runs: OK false negative chance: 0.000 # git bisect good 2b1ef80d68100a064f94fb2e658881b9f260cf08 Bisecting: 486 revisions left to test after this (roughly 9 steps) [c6d64479d6093a5c3d709d4cc992a5344877cc3c] Merge tag 'pull-statx' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs testing commit c6d64479d6093a5c3d709d4cc992a5344877cc3c gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: e075b0026f480aef46895127cc50f300f05ef6d35b6918f54338589ae34a4514 all runs: OK false negative chance: 0.000 # git bisect good c6d64479d6093a5c3d709d4cc992a5344877cc3c Bisecting: 262 revisions left to test after this (roughly 8 steps) [77a0cfafa9af9c0d5b43534eb90d530c189edca1] Merge tag 'for-6.13/block-20241118' of git://git.kernel.dk/linux testing commit 77a0cfafa9af9c0d5b43534eb90d530c189edca1 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 3f55e84f91c3efd0921bd008b97a71d3bf59c3cfe7776543d28bdf460cffec92 run #0: crashed: BUG: MAX_LOCKDEP_KEYS too low! run #1: crashed: BUG: MAX_LOCKDEP_KEYS too low! run #2: crashed: BUG: MAX_LOCKDEP_KEYS too low! run #3: crashed: BUG: MAX_LOCKDEP_KEYS too low! run #4: crashed: BUG: MAX_LOCKDEP_KEYS too low! run #5: crashed: BUG: MAX_LOCKDEP_KEYS too low! run #6: crashed: BUG: MAX_LOCKDEP_KEYS too low! run #7: crashed: BUG: MAX_LOCKDEP_KEYS too low! run #8: crashed: BUG: MAX_LOCKDEP_KEYS too low! run #9: OK representative crash: BUG: MAX_LOCKDEP_KEYS too low!, types: [UNKNOWN] # git bisect bad 77a0cfafa9af9c0d5b43534eb90d530c189edca1 Bisecting: 111 revisions left to test after this (roughly 7 steps) [e559ee022658c70bdc07c4846bf279f5a5abc494] btrfs: validate queue limits testing commit e559ee022658c70bdc07c4846bf279f5a5abc494 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 1900a335d0f6d99b28f8979af263a477c40b021e18d639141edcd8cf7d235df5 run #0: crashed: BUG: MAX_LOCKDEP_KEYS too low! run #1: crashed: BUG: MAX_LOCKDEP_KEYS too low! run #2: crashed: BUG: MAX_LOCKDEP_KEYS too low! run #3: crashed: BUG: MAX_LOCKDEP_KEYS too low! run #4: crashed: BUG: MAX_LOCKDEP_KEYS too low! run #5: crashed: BUG: MAX_LOCKDEP_KEYS too low! run #6: crashed: BUG: MAX_LOCKDEP_KEYS too low! run #7: crashed: BUG: MAX_LOCKDEP_KEYS too low! run #8: crashed: BUG: MAX_LOCKDEP_KEYS too low! run #9: OK representative crash: BUG: MAX_LOCKDEP_KEYS too low!, types: [UNKNOWN] # git bisect bad e559ee022658c70bdc07c4846bf279f5a5abc494 Bisecting: 55 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 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 4ce2afe7869cb1d83789e0b74853fc99dbddda987aa18964d4292532152ff07d 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 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: e33258714b30a878d8e6eb16e517021898a4dc0e1db1202fa65e558ff45fb5f4 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 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 3906381fa77a8efd062f3cfc2a66244c0112e8a61f661d4208ef031c2c658f60 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 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: eff2f55f824ce2a8061a5afab600226709729166e35bc0bc4e6a9aea12f6a00a run #0: crashed: BUG: MAX_LOCKDEP_KEYS too low! run #1: crashed: BUG: MAX_LOCKDEP_KEYS too low! run #2: crashed: BUG: MAX_LOCKDEP_KEYS too low! run #3: crashed: BUG: MAX_LOCKDEP_KEYS too low! run #4: crashed: BUG: MAX_LOCKDEP_KEYS too low! run #5: crashed: BUG: MAX_LOCKDEP_KEYS too low! run #6: crashed: BUG: MAX_LOCKDEP_KEYS too low! run #7: crashed: BUG: MAX_LOCKDEP_KEYS too low! run #8: crashed: BUG: MAX_LOCKDEP_KEYS too low! run #9: OK 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 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: d01992b38f3917e367e313a736ba4ea167f9a07ad26a922e34ae96e525e1967c 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 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 2a241eb80bbe30717b378898d75abe57c041d3d95c274cb065b3fe3020257694 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 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 0f73f7bd48bb61b125bb8cd40f2ac64df246c2b3f55badbab435ff99665f5d6b 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: 0f73f7bd48bb61b125bb8cd40f2ac64df246c2b3f55badbab435ff99665f5d6b parent signature: 2a241eb80bbe30717b378898d75abe57c041d3d95c274cb065b3fe3020257694 revisions tested: 26, total time: 10h44m29.404515261s (build: 6h11m54.073810398s, test: 4h5m41.029019417s) 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! netlink: 12 bytes leftover after parsing attributes in process `syz.2.2224'. BUG: MAX_LOCKDEP_KEYS too low! turning off the locking correctness validator. CPU: 0 UID: 0 PID: 15590 Comm: syz.2.2224 Not tainted 6.12.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: dump_stack_lvl+0xaf/0x110 lib/dump_stack.c:120 register_lock_class+0x268/0x280 kernel/locking/lockdep.c:1328 __lock_acquire+0x90/0x20e0 kernel/locking/lockdep.c:5077 lock_acquire+0xea/0x270 kernel/locking/lockdep.c:5825 blk_freeze_acquire_lock block/blk.h:736 [inline] blk_freeze_queue_start+0x85/0xc0 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+0x58/0xb0 block/elevator.c:602 add_disk_fwnode+0x50/0x410 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+0xc9/0x120 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+0xe6/0x120 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+0x259/0x380 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x33d/0x3d0 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:729 [inline] __sock_sendmsg+0x81/0xa0 net/socket.c:744 ____sys_sendmsg+0x1bb/0x210 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+0xa4/0x180 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0df478e929 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:00007f0df5692038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f0df49b5fa0 RCX: 00007f0df478e929 RDX: 0000000020000000 RSI: 0000200000001ac0 RDI: 0000000000000004 RBP: 00007f0df4810b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f0df49b5fa0 R15: 00007ffe481a4198