ci starts bisection 2025-08-01 01:04:04.568898489 +0000 UTC m=+40706.798158724
bisecting cause commit starting from 759dfc7d04bab1b0b86113f1164dc1fec192b859
building syzkaller on 0c075d67fcfde8d048cca2f751a82db97ebc3754
ensuring issue is reproducible on original commit 759dfc7d04bab1b0b86113f1164dc1fec192b859

testing commit 759dfc7d04bab1b0b86113f1164dc1fec192b859 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: 8a6e57913b0ac4e68276ee4e00f8e010da2beab2e7d6d2c3ade70ed5826752ee
all runs: crashed: possible deadlock in kernfs_remove
representative crash: possible deadlock in kernfs_remove, types: [LOCKDEP]
check whether we can drop unnecessary instrumentation
disabling configs for [atomic_sleep hang memleak ubsan bug_or_warning kasan], they are not needed
testing commit 759dfc7d04bab1b0b86113f1164dc1fec192b859 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: 278ea3e41b2ad81f338d15df0e891eeecff749b478cf84839605948db5f719e6
all runs: crashed: possible deadlock in kernfs_remove
representative crash: possible deadlock in kernfs_remove, types: [LOCKDEP]
the bug reproduces without the instrumentation
disabling configs for [bug_or_warning kasan atomic_sleep hang memleak ubsan], they are not needed
kconfig minimization: base=4095 full=8484 leaves diff=2167
split chunks (needed=false): <2167>
split chunk #0 of len 2167 into 5 parts
testing without sub-chunk 1/5
disabling configs for [kasan atomic_sleep hang memleak ubsan bug_or_warning], they are not needed
testing commit 759dfc7d04bab1b0b86113f1164dc1fec192b859 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: 4995e54dd617643259006bcd0f2d82dd79457bc7f9b6c7a6b05b2bfc3cceb7b5
all runs: OK
false negative chance: 0.000
testing without sub-chunk 2/5
disabling configs for [atomic_sleep hang memleak ubsan bug_or_warning kasan], they are not needed
testing commit 759dfc7d04bab1b0b86113f1164dc1fec192b859 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: 87809abcbdeae839e7eeee1005d389d8be6fcb4b26d87f8d6a2b4092b212c12d
all runs: crashed: possible deadlock in kernfs_remove
representative crash: possible deadlock in kernfs_remove, types: [LOCKDEP]
the chunk can be dropped
testing without sub-chunk 3/5
disabling configs for [hang memleak ubsan bug_or_warning kasan atomic_sleep], they are not needed
testing commit 759dfc7d04bab1b0b86113f1164dc1fec192b859 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: 234564655e763cae87183bb0c26b61f51aed888865f7c2e0193216573f86b474
all runs: crashed: possible deadlock in kernfs_remove
representative crash: possible deadlock in kernfs_remove, types: [LOCKDEP]
the chunk can be dropped
testing without sub-chunk 4/5
disabling configs for [kasan atomic_sleep hang memleak ubsan bug_or_warning], they are not needed
testing commit 759dfc7d04bab1b0b86113f1164dc1fec192b859 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: 5995b213e1a3079235f5fd18aaaede6c36bd1b7d96cc5f65e1a571d2b53cb9d8
all runs: crashed: possible deadlock in kernfs_remove
representative crash: possible deadlock in kernfs_remove, types: [LOCKDEP]
the chunk can be dropped
testing without sub-chunk 5/5
disabling configs for [atomic_sleep hang memleak ubsan bug_or_warning kasan], they are not needed
testing commit 759dfc7d04bab1b0b86113f1164dc1fec192b859 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: 6d53cc987bf0996d07c4289d3e19803047d1f35b24b3808dd5e0cefdf71f9efd
all runs: crashed: possible deadlock in kernfs_remove
representative crash: possible deadlock in kernfs_remove, types: [LOCKDEP]
the chunk can be dropped
minimized to 434 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_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 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 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 [hang memleak ubsan bug_or_warning kasan atomic_sleep], 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 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: 72fea8290cd4d0c999653f6e8ce475ebf8a2f711be6136f8b17547aea8d11b4b
run #0: crashed: possible deadlock in pcpu_alloc_noprof
run #1: crashed: possible deadlock in pcpu_alloc_noprof
run #2: crashed: possible deadlock in pcpu_alloc_noprof
run #3: crashed: possible deadlock in pcpu_alloc_noprof
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
representative crash: possible deadlock in pcpu_alloc_noprof, types: [LOCKDEP]
testing release v6.15
testing commit 0ff41df1cb268fc69e703a08a57ee14ae967d0ca gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: 4d2b00f1a9ae7d729694e54c4ceb7e1e4050f96b5e0393255765bb70415b3570
all runs: crashed: possible deadlock in blk_mq_update_nr_hw_queues
representative crash: possible deadlock in blk_mq_update_nr_hw_queues, types: [LOCKDEP]
testing release v6.14
testing commit 38fec10eb60d687e30c8c6b5420d86e8149f7557 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: ae0baa300cfee088ca64ae65d2b08a5cf2724c49f2027280b8d7769d2a0f752c
all runs: OK
false negative chance: 0.000
# git bisect start 0ff41df1cb268fc69e703a08a57ee14ae967d0ca 38fec10eb60d687e30c8c6b5420d86e8149f7557
Bisecting: 8357 revisions left to test after this (roughly 13 steps)
[390513642ee6763c7ada07f0a1470474986e6c1c] io_uring: always do atomic put from iowq

testing commit 390513642ee6763c7ada07f0a1470474986e6c1c gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: 1e74aeb40d2ca0bc09410e8e9af3f5b39d41a963bfc042577ec6ddf4ed4c0755
all runs: crashed: possible deadlock in blk_mq_update_nr_hw_queues
representative crash: possible deadlock in blk_mq_update_nr_hw_queues, types: [LOCKDEP]
# git bisect bad 390513642ee6763c7ada07f0a1470474986e6c1c
Bisecting: 3789 revisions left to test after this (roughly 12 steps)
[9b960d8cd6f712cb2c03e2bdd4d5ca058238037f] Merge tag 'for-6.15/block-20250322' of git://git.kernel.dk/linux

testing commit 9b960d8cd6f712cb2c03e2bdd4d5ca058238037f gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: 0c381055acee3012120f9dc955e178335573ce36cceae4388e2f039118614da4
all runs: crashed: possible deadlock in blk_mq_update_nr_hw_queues
representative crash: possible deadlock in blk_mq_update_nr_hw_queues, types: [LOCKDEP]
# git bisect bad 9b960d8cd6f712cb2c03e2bdd4d5ca058238037f
Bisecting: 1851 revisions left to test after this (roughly 11 steps)
[7d20aa5c32ac8bd272b5470ddbd7ac6e0cb35714] Merge tag 'pm-6.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

testing commit 7d20aa5c32ac8bd272b5470ddbd7ac6e0cb35714 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: 988cd546fec6208a85b966ea3bf663182b726c4d6495320dbd0c501021606812
all runs: boot failed: BUG: unable to handle kernel NULL pointer dereference in msix_capability_init
unable to determine the verdict: 0 good runs (wanted 15), for bad wanted 10 in total, got 0
# git bisect skip 7d20aa5c32ac8bd272b5470ddbd7ac6e0cb35714
Bisecting: 1851 revisions left to test after this (roughly 11 steps)
[43a2930348040b3a7ad3b809e211dea233267f28] ASoC: rockchip: Convert to RUNTIME_PM_OPS() & co

testing commit 43a2930348040b3a7ad3b809e211dea233267f28 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: 811bf82f3b4f9e1c995a5f7b0a6a4671f3643ad4ada1ccf51849c6aab658f616
all runs: OK
false negative chance: 0.000
# git bisect good 43a2930348040b3a7ad3b809e211dea233267f28
Bisecting: 1720 revisions left to test after this (roughly 11 steps)
[27bd3ce4038baad9976d287ce883df1674f3220e] Merge tag 'm68k-for-v6.15-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k

testing commit 27bd3ce4038baad9976d287ce883df1674f3220e gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: 8556782cdd98616ed16ea43a1950850593485c6ddda987f9e69a7c473e13dea7
all runs: OK
false negative chance: 0.000
# git bisect good 27bd3ce4038baad9976d287ce883df1674f3220e
Bisecting: 847 revisions left to test after this (roughly 10 steps)
[2a2274e90a76c24a03287e386f1ad128a8cc3b67] Merge tag 'pmdomain-v6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/linux-pm

testing commit 2a2274e90a76c24a03287e386f1ad128a8cc3b67 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: 55d99dbe23647a183d07d23f089956e19c2b1ef5ab982adad4f78e5b1d552de6
all runs: boot failed: BUG: unable to handle kernel NULL pointer dereference in msix_capability_init
unable to determine the verdict: 0 good runs (wanted 15), for bad wanted 10 in total, got 0
# git bisect skip 2a2274e90a76c24a03287e386f1ad128a8cc3b67
Bisecting: 847 revisions left to test after this (roughly 10 steps)
[8015443e24e76fac97268603e91c4793970ce657] gpio: Hide valid_mask from direct assignments

testing commit 8015443e24e76fac97268603e91c4793970ce657 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: 13d238a2c0cc1380dfd1f89951b181fcfd25a6e7de2d530f21f66e1451e098bc
all runs: OK
false negative chance: 0.000
# git bisect good 8015443e24e76fac97268603e91c4793970ce657
Bisecting: 827 revisions left to test after this (roughly 10 steps)
[c84907a1459588c883ef84a35bb69d46ca37e4e7] Merge tag 'auxdisplay-v6.15-1' of git://git.kernel.org/pub/scm/linux/kernel/git/andy/linux-auxdisplay

testing commit c84907a1459588c883ef84a35bb69d46ca37e4e7 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: e5c091efe4c215ec62dec8e4d028e5e0269f76bb74acdb54fcc162ce339f8725
all runs: boot failed: BUG: unable to handle kernel NULL pointer dereference in msix_capability_init
unable to determine the verdict: 0 good runs (wanted 15), for bad wanted 10 in total, got 0
# git bisect skip c84907a1459588c883ef84a35bb69d46ca37e4e7
Bisecting: 827 revisions left to test after this (roughly 10 steps)
[aa85822c611aef7cd4dc17d27121d43e21bb82f0] ALSA: hda/realtek: Enable PC beep passthrough for HP EliteBook 855 G7

testing commit aa85822c611aef7cd4dc17d27121d43e21bb82f0 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: 1bddca4daeb45f3080c178e84b25c9be71156ba530fb4e4a1b636f1ba39b0008
all runs: OK
false negative chance: 0.000
# git bisect good aa85822c611aef7cd4dc17d27121d43e21bb82f0
Bisecting: 812 revisions left to test after this (roughly 10 steps)
[4742da9774a416908ef8e3916164192c15c0e2d1] cpufreq: scpi: compare kHz instead of Hz

testing commit 4742da9774a416908ef8e3916164192c15c0e2d1 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: 8775a0f2ef5f367a7d53566d17a424afe54b2f2840afc97e37939f9c2edef4ec
all runs: OK
false negative chance: 0.000
# git bisect good 4742da9774a416908ef8e3916164192c15c0e2d1
Bisecting: 812 revisions left to test after this (roughly 10 steps)
[bf1bb26f23f10f835e596337604d32d34ab798a6] hwmon: add driver for HTU31

testing commit bf1bb26f23f10f835e596337604d32d34ab798a6 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: 40e4bbde34fb80838e141b727e537b8078c163ac8af6113d44264551f4f9ba5f
all runs: OK
false negative chance: 0.000
# git bisect good bf1bb26f23f10f835e596337604d32d34ab798a6
Bisecting: 812 revisions left to test after this (roughly 10 steps)
[78f4ca3c6f6fd305b9af8c51470643617df85e11] ALSA: hda/realtek: fix micmute LEDs on HP Laptops with ALC3247

testing commit 78f4ca3c6f6fd305b9af8c51470643617df85e11 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: ead2986d59730ae2a7bad3c339decafffe2a33ba0a1aa473340a90272e0a5618
all runs: OK
false negative chance: 0.000
# git bisect good 78f4ca3c6f6fd305b9af8c51470643617df85e11
Bisecting: 807 revisions left to test after this (roughly 10 steps)
[978540050a85a2b7fc77b60a1cfaec110682e9c3] nvme-fc: Utilise min3() to simplify queue count calculation

testing commit 978540050a85a2b7fc77b60a1cfaec110682e9c3 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: 590b19da91d7b6b341edc728d4a4f99dc288d3865d9d2860936b5925add435b1
all runs: crashed: possible deadlock in blk_mq_update_nr_hw_queues
representative crash: possible deadlock in blk_mq_update_nr_hw_queues, types: [LOCKDEP]
# git bisect bad 978540050a85a2b7fc77b60a1cfaec110682e9c3
Bisecting: 48 revisions left to test after this (roughly 6 steps)
[3efe7571c3ae2b6481253a2616c2bb3fbadd503b] block: protect nr_requests update using q->elevator_lock

testing commit 3efe7571c3ae2b6481253a2616c2bb3fbadd503b gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: 463afda572cf18dba496150c482ff89959de8f747862822091bb43fea3c69537
all runs: OK
false negative chance: 0.000
# git bisect good 3efe7571c3ae2b6481253a2616c2bb3fbadd503b
Bisecting: 23 revisions left to test after this (roughly 5 steps)
[78800f5997d8ae0f20d4aced66a524f0f2fc4c7f] block: remove unnecessary goto labels in debugfs attribute read methods

testing commit 78800f5997d8ae0f20d4aced66a524f0f2fc4c7f gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: 175b2283bd84c98c4aa1994019a5652ce81ac12b42c80ccb6820b75f5ea2e119
run #0: ignore: lost connection to test machine
run #1: ignore: lost connection to test machine
run #2: ignore: lost connection to test machine
run #3: OK
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
run #10: OK
run #11: OK
run #12: OK
run #13: OK
run #14: OK
run #15: OK
run #16: OK
run #17: OK
run #18: OK
run #19: OK
false negative chance: 0.000
# git bisect good 78800f5997d8ae0f20d4aced66a524f0f2fc4c7f
Bisecting: 11 revisions left to test after this (roughly 4 steps)
[5c12a9cdb5ad54621f1b7c02df7993a4a1b86a46] nvme: add nvme_auth_generate_psk()

testing commit 5c12a9cdb5ad54621f1b7c02df7993a4a1b86a46 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: 8139ca45b42929c67e70253fda790a829ec7624bf2a5efcf29dae90492515d01
all runs: crashed: possible deadlock in blk_mq_update_nr_hw_queues
representative crash: possible deadlock in blk_mq_update_nr_hw_queues, types: [LOCKDEP]
# git bisect bad 5c12a9cdb5ad54621f1b7c02df7993a4a1b86a46
Bisecting: 5 revisions left to test after this (roughly 3 steps)
[989bcd623a8b0c32b76d9258767d8b37e53419e6] ublk: remove io_cmds list in ublk_queue

testing commit 989bcd623a8b0c32b76d9258767d8b37e53419e6 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: 0dd2c6c812486ecb9c0f373bd33d027c48c2bf32d8dc2c0ed0f0154b468caf9a
all runs: crashed: possible deadlock in blk_mq_update_nr_hw_queues
representative crash: possible deadlock in blk_mq_update_nr_hw_queues, types: [LOCKDEP]
# git bisect bad 989bcd623a8b0c32b76d9258767d8b37e53419e6
Bisecting: 2 revisions left to test after this (roughly 2 steps)
[ffa1e7ada456087c2402b37cd6b2863ced29aff0] block: Make request_queue lockdep splats show up earlier

testing commit ffa1e7ada456087c2402b37cd6b2863ced29aff0 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: 86b221376ca61284b13fef22258bab8c8d89095051a19e6f95c283d170392f80
all runs: crashed: possible deadlock in blk_mq_update_nr_hw_queues
representative crash: possible deadlock in blk_mq_update_nr_hw_queues, types: [LOCKDEP]
# git bisect bad ffa1e7ada456087c2402b37cd6b2863ced29aff0
Bisecting: 1 revision left to test after this (roughly 1 step)
[0e94ed33681424a6dce65c62837e08e4c7aa09ac] block: protect debugfs attribute method hctx_busy_show

reproducer is flaky (1.00 repro chance estimate)
revisions tested: 28, total time: 12h6m48.973707177s (build: 7h45m11.300376579s, test: 3h26m41.895616261s)
error: bisection is taking too long (>12h0m0s), aborting