ci2 starts bisection 2025-06-01 13:05:40.285174424 +0000 UTC m=+335530.413051327 bisecting cause commit starting from 4cb6c8af8591135ec000fbe4bb474139ceec595d building syzkaller on 3d2f584ddab119da50e8a8d26765aa98d3b33c02 ensuring issue is reproducible on original commit 4cb6c8af8591135ec000fbe4bb474139ceec595d testing commit 4cb6c8af8591135ec000fbe4bb474139ceec595d gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 79ee212fb1be80f2d7211b94982dc805b8e2755774816edbddd2c17c97d9e66b all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in mempool_alloc_noprof representative crash: BUG: unable to handle kernel NULL pointer dereference in mempool_alloc_noprof, types: [UNKNOWN] check whether we can drop unnecessary instrumentation disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed testing commit 4cb6c8af8591135ec000fbe4bb474139ceec595d gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 47845675dff4993aa72e37440be2899c02c603a3daa62691dbec24f96eab9aca all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in mempool_alloc_noprof representative crash: BUG: unable to handle kernel NULL pointer dereference in mempool_alloc_noprof, types: [UNKNOWN] the bug reproduces without the instrumentation disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN], they are not needed kconfig minimization: base=4084 full=8349 leaves diff=2131 split chunks (needed=false): <2131> split chunk #0 of len 2131 into 5 parts testing without sub-chunk 1/5 disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN], they are not needed testing commit 4cb6c8af8591135ec000fbe4bb474139ceec595d gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: bbb39d7421f62f861caef8cfa5e58f37ba7aa04f0914aeb11afae3802f5c01de all runs: OK false negative chance: 0.000 testing without sub-chunk 2/5 disabling configs for [BUG KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed testing commit 4cb6c8af8591135ec000fbe4bb474139ceec595d gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 91a3ddebb204bea8eaa0b6cf9be7349931a0c15e20d049925227fd4ded775064 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in mempool_alloc_noprof representative crash: BUG: unable to handle kernel NULL pointer dereference in mempool_alloc_noprof, types: [UNKNOWN] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP HANG], they are not needed testing commit 4cb6c8af8591135ec000fbe4bb474139ceec595d gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 98a9c838dbc9b80387411387a622550d452d1279fcc26ed2a0b6fbfdcabc29e2 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in mempool_alloc_noprof representative crash: BUG: unable to handle kernel NULL pointer dereference in mempool_alloc_noprof, types: [UNKNOWN] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN LOCKDEP], they are not needed testing commit 4cb6c8af8591135ec000fbe4bb474139ceec595d gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 51d2a6c4c450981568df52e7d35bf1e16abc04f235c678ee97f4314cf97728ab all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in mempool_alloc_noprof representative crash: BUG: unable to handle kernel NULL pointer dereference in mempool_alloc_noprof, types: [UNKNOWN] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [HANG LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit 4cb6c8af8591135ec000fbe4bb474139ceec595d gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 27d51d3ca3cefcb18e52b5fd4e8ff2a113e0d5ba6518d2a302ec343dea0db10c all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in mempool_alloc_noprof representative crash: BUG: unable to handle kernel NULL pointer dereference in mempool_alloc_noprof, types: [UNKNOWN] the chunk can be dropped minimized to 427 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_MRRM ACPI_NFIT ACPI_NHLT ACPI_PLATFORM_PROFILE ADFS_FS AFFS_FS AFS_FS AFS_FSCACHE AF_KCM AF_RXRPC AF_RXRPC_IPV6 AIX_PARTITION AMD_SFH_HID AMIGA_PARTITION ANDROID_BINDERFS ANDROID_BINDER_IPC ANON_VMA_NAME APERTURE_HELPERS APPLE_MFI_FASTCHARGE AR5523 ARCH_ENABLE_MEMORY_HOTREMOVE ARCH_ENABLE_THP_MIGRATION ARCH_HAS_USER_SHADOW_STACK ARCH_SUPPORTS_HUGE_PFNMAP ARCH_SUPPORTS_PMD_PFNMAP ARCH_SUPPORTS_PUD_PFNMAP ARCH_WANT_PMD_MKWRITE ASM_MODVERSIONS ASUS_TF103C_DOCK ASYNC_CORE ASYNC_MEMCPY ASYNC_PQ ASYNC_RAID6_RECOV ASYNC_TX_DMA ASYNC_XOR ATARI_PARTITION ATA_GENERIC ATA_OVER_ETH ATH10K ATH10K_CE ATH10K_LEDS ATH10K_PCI ATH10K_USB ATH11K ATH6KL ATH6KL_USB ATH9K ATH9K_AHB ATH9K_BTCOEX_SUPPORT ATH9K_CHANNEL_CONTEXT ATH9K_COMMON ATH9K_COMMON_DEBUG ATH9K_COMMON_SPECTRAL ATH9K_DEBUGFS ATH9K_DYNACK ATH9K_HTC ATH9K_HTC_DEBUGFS ATH9K_HW ATH9K_PCI ATH9K_PCOEM ATH9K_RFKILL ATH_COMMON ATM ATM_BR2684 ATM_CLIP ATM_DRIVERS ATM_LANE ATM_MPOA ATM_TCP AUXILIARY_BUS AX25 AX25_DAMA_SLAVE AX88796B_PHY BAREUDP BATMAN_ADV BATMAN_ADV_BATMAN_V BATMAN_ADV_BLA BATMAN_ADV_DAT BATMAN_ADV_MCAST BATMAN_ADV_NC BCACHE BCACHEFS_DEBUG BCACHEFS_ERASURE_CODING BCACHEFS_FS BCACHEFS_POSIX_ACL BCACHEFS_QUOTA BCACHEFS_SIX_OPTIMISTIC_SPIN BCMA BCMA_HOST_PCI_POSSIBLE BEFS_FS BFQ_CGROUP_DEBUG BFQ_GROUP_IOSCHED BFS_FS BIG_KEYS BLK_CGROUP_PUNT_BIO BLK_CGROUP_RWSTAT BLK_DEV_BSGLIB BLK_DEV_INTEGRITY BLK_DEV_NBD BLK_DEV_NULL_BLK BLK_DEV_NULL_BLK_FAULT_INJECTION BLK_DEV_NVME BLK_DEV_PMEM BLK_DEV_RAM BLK_DEV_RNBD BLK_DEV_RNBD_CLIENT BLK_DEV_THROTTLING BLK_DEV_ZONED BLK_ICQ BLK_INLINE_ENCRYPTION BLK_INLINE_ENCRYPTION_FALLBACK BLK_WBT BLK_WBT_MQ BONDING BOOT_VESA_SUPPORT BPF_EVENTS BPF_JIT BPF_JIT_ALWAYS_ON BPF_JIT_DEFAULT_ON BPF_LSM BPF_PRELOAD BPF_PRELOAD_UMD BPF_STREAM_PARSER BPF_SYSCALL BPQETHER BRIDGE BRIDGE_CFM BRIDGE_EBT_802_3 BRIDGE_EBT_AMONG BRIDGE_EBT_ARP BRIDGE_EBT_ARPREPLY BRIDGE_EBT_BROUTE BRIDGE_EBT_DNAT BRIDGE_EBT_IP BRIDGE_EBT_IP6 BRIDGE_EBT_LIMIT BRIDGE_EBT_LOG BRIDGE_EBT_MARK BRIDGE_EBT_MARK_T BRIDGE_EBT_NFLOG BRIDGE_EBT_PKTTYPE BRIDGE_EBT_REDIRECT BRIDGE_EBT_SNAT BRIDGE_EBT_STP BRIDGE_EBT_T_FILTER BRIDGE_EBT_T_NAT BRIDGE_EBT_VLAN BRIDGE_IGMP_SNOOPING BRIDGE_MRP BRIDGE_NF_EBTABLES BRIDGE_NF_EBTABLES_LEGACY BRIDGE_VLAN_FILTERING BSD_DISKLABEL BSD_PROCESS_ACCT_V3 BT BTRFS_ASSERT BTRFS_FS BTRFS_FS_POSIX_ACL BTRFS_FS_REF_VERIFY BTT BT_6LOWPAN BT_ATH3K BT_BCM BT_BNEP BT_BNEP_MC_FILTER BT_BNEP_PROTO_FILTER BT_BREDR BT_HCIBCM203X BT_HCIBFUSB BT_HCIBPA10X BT_HCIBTUSB BT_HCIBTUSB_AUTOSUSPEND BT_HCIBTUSB_BCM BT_HCIBTUSB_MTK BT_HCIBTUSB_POLL_SYNC BT_HCIBTUSB_RTL BT_HCIUART BT_HCIUART_3WIRE BT_HCIUART_AG6XX BT_HCIUART_BCSP BT_HCIUART_H4 BT_HCIUART_LL BT_HCIUART_MRVL BT_HCIUART_QCA BT_HCIUART_SERDEV BT_HCIVHCI BT_INTEL BT_LE BT_LEDS BT_LE_L2CAP_ECRED BT_MRVL BT_MRVL_SDIO BT_MSFTEXT BT_MTK BT_MTKSDIO BT_MTKUART BT_QCA BT_RFCOMM BT_RFCOMM_TTY BT_RTL CACHEFILES CAIF CAIF_DEBUG CAIF_DRIVERS CAIF_NETDEV CAIF_TTY CAIF_USB CAIF_VIRTIO CAN CAN_8DEV_USB CAN_BCM CAN_CALC_BITTIMING CAN_DEV CAN_EMS_USB CAN_ESD_USB CAN_ETAS_ES58X CAN_F81604 CAN_GS_USB CAN_GW CAN_IFI_CANFD CAN_ISOTP CAN_J1939 CAN_KVASER_USB CAN_MCBA_USB CAN_NETLINK CAN_PEAK_USB CAN_RAW CAN_RX_OFFLOAD CAN_SLCAN CAN_UCAN CAN_VCAN CAN_VXCAN CARL9170 CARL9170_HWRNG CARL9170_LEDS CARL9170_WPC CEC_CORE CEPH_FS CEPH_FSCACHE CEPH_FS_POSIX_ACL CEPH_LIB CEPH_LIB_USE_DNS_RESOLVER CFG80211 CFG80211_CRDA_SUPPORT CFG80211_DEBUGFS CFG80211_DEFAULT_PS CFG80211_REQUIRE_SIGNED_REGDB CFG80211_USE_KERNEL_REGDB_KEYS CFG80211_WEXT CFS_BANDWIDTH CGROUP_BPF CHARGER_ISP1704 CHR_DEV_ST CIFS CIFS_ALLOW_INSECURE_LEGACY CIFS_DEBUG CIFS_DFS_UPCALL CIFS_FSCACHE CIFS_POSIX CIFS_SMB_DIRECT CIFS_SWN_UPCALL CIFS_UPCALL CIFS_XATTR CLOSURES CLS_U32_MARK CLS_U32_PERF CMA CMA_SIZE_SEL_MAX CMDLINE_PARTITION COMEDI COMEDI_DT9812 COMEDI_NI_USB6501 COMEDI_USBDUX COMEDI_USBDUXFAST COMEDI_USBDUXSIGMA COMEDI_USB_DRIVERS COMEDI_VMK80XX COMPAT_NETLINK_MESSAGES COUNTER CRAMFS CRAMFS_BLOCKDEV CRAMFS_MTD CRC64 CRC64_ARCH CRC8 CRC_ITU_T CRC_T10DIF CRC_T10DIF_ARCH CRYPTO_842 CRYPTO_ADIANTUM CRYPTO_AEGIS128 CRYPTO_AEGIS128_AESNI_SSE2 CRYPTO_AES_NI_INTEL CRYPTO_AES_TI CRYPTO_ANSI_CPRNG CRYPTO_ANUBIS CRYPTO_ARC4 CRYPTO_ARCH_HAVE_LIB_BLAKE2S CRYPTO_ARCH_HAVE_LIB_CHACHA CRYPTO_ARCH_HAVE_LIB_CURVE25519 CRYPTO_ARCH_HAVE_LIB_POLY1305 CRYPTO_ARCH_HAVE_LIB_SHA256 CRYPTO_ARCH_HAVE_LIB_SHA256_SIMD CRYPTO_ARIA CRYPTO_ARIA_AESNI_AVX_X86_64 CRYPTO_BLAKE2B CRYPTO_BLAKE2S_X86 CRYPTO_BLOWFISH CRYPTO_BLOWFISH_COMMON CRYPTO_BLOWFISH_X86_64 CRYPTO_CAMELLIA CRYPTO_CAMELLIA_AESNI_AVX2_X86_64 CRYPTO_CAMELLIA_AESNI_AVX_X86_64 CRYPTO_CAMELLIA_X86_64 CRYPTO_CAST5 CRYPTO_CAST5_AVX_X86_64 CRYPTO_CAST6 CRYPTO_CAST6_AVX_X86_64 CRYPTO_CAST_COMMON CRYPTO_CHACHA20 CRYPTO_CHACHA20POLY1305 CRYPTO_CHACHA20_X86_64 CRYPTO_CRC32C CRYPTO_CRYPTD CRYPTO_CTS CRYPTO_CURVE25519 CRYPTO_CURVE25519_X86 CRYPTO_DEFLATE CRYPTO_DES CRYPTO_DES3_EDE_X86_64 CRYPTO_DEV_CCP CRYPTO_DEV_CCP_DD CRYPTO_DEV_PADLOCK CRYPTO_DEV_PADLOCK_AES CRYPTO_DEV_PADLOCK_SHA CRYPTO_DEV_QAT CRYPTO_DEV_QAT_C3XXX CRYPTO_DEV_QAT_C3XXXVF CRYPTO_DEV_QAT_C62X CRYPTO_DEV_QAT_C62XVF CRYPTO_DEV_QAT_DH895xCC CRYPTO_DEV_QAT_DH895xCCVF CRYPTO_DEV_VIRTIO CRYPTO_DH CRYPTO_DRBG_CTR CRYPTO_DRBG_HASH CRYPTO_ECDH CRYPTO_ECRDSA CRYPTO_ENGINE CRYPTO_ESSIV CRYPTO_FCRYPT CRYPTO_GHASH_CLMUL_NI_INTEL CRYPTO_HCTR2 CRYPTO_HKDF CRYPTO_KDF800108_CTR CRYPTO_KHAZAD CRYPTO_KPP CRYPTO_KRB5 CRYPTO_KRB5ENC CRYPTO_LIB_ARC4 CRYPTO_LIB_CHACHA CRYPTO_LIB_CHACHA20POLY1305 CRYPTO_LIB_CHACHA_GENERIC CRYPTO_LIB_CURVE25519 CRYPTO_LIB_CURVE25519_GENERIC CRYPTO_LIB_CURVE25519_INTERNAL CRYPTO_LIB_DES CRYPTO_LIB_POLY1305 CRYPTO_LIB_POLY1305_GENERIC CRYPTO_LIB_SHA256_GENERIC CRYPTO_LIB_SM3 CRYPTO_LRW CRYPTO_LZ4 CRYPTO_LZ4HC CRYPTO_MICHAEL_MIC CRYPTO_NHPOLY1305 CRYPTO_NHPOLY1305_AVX2 CRYPTO_NHPOLY1305_SSE2 CRYPTO_PCBC CRYPTO_PCRYPT CRYPTO_POLY1305_X86_64 CRYPTO_POLYVAL CRYPTO_POLYVAL_CLMUL_NI CRYPTO_RMD160 CRYPTO_SEED CRYPTO_SERPENT CRYPTO_SERPENT_AVX2_X86_64 CRYPTO_SERPENT_AVX_X86_64 CRYPTO_SERPENT_SSE2_X86_64 CRYPTO_SHA1_SSSE3 CRYPTO_SHA256_X86_64 CRYPTO_SHA512_SSSE3 CRYPTO_SM3_AVX_X86_64 CRYPTO_SM4 CRYPTO_SM4_AESNI_AVX2_X86_64 CRYPTO_SM4_AESNI_AVX_X86_64 CRYPTO_SM4_GENERIC CRYPTO_STREEBOG CRYPTO_TEA CRYPTO_TWOFISH CRYPTO_TWOFISH_AVX_X86_64 CRYPTO_TWOFISH_COMMON CRYPTO_TWOFISH_X86_64 CRYPTO_TWOFISH_X86_64_3WAY CRYPTO_USER CRYPTO_USER_API CRYPTO_USER_API_AEAD CRYPTO_USER_API_ENABLE_OBSOLETE CRYPTO_USER_API_HASH CRYPTO_USER_API_RNG CRYPTO_USER_API_SKCIPHER CRYPTO_WP512 CRYPTO_XCBC CRYPTO_XCTR CRYPTO_XTS CRYPTO_XXHASH CRYPTO_ZSTD CUSE CYPRESS_FIRMWARE DAMON DAMON_PADDR DAMON_RECLAIM DAMON_VADDR DAX DCA DCB DEBUG_VFS DEFAULT_CODEL DEVICE_MIGRATION DEVICE_PRIVATE DEV_COREDUMP DEV_DAX DLN2_ADC DMABUF_HEAPS DMABUF_HEAPS_CMA DMABUF_HEAPS_SYSTEM DMABUF_MOVE_NOTIFY DMA_CMA DMA_ENGINE_RAID DM_AUDIT DM_BIO_PRISON DM_BUFIO DM_CACHE DM_CACHE_SMQ DM_CLONE DM_CRYPT DM_FLAKEY DM_INTEGRITY DM_MULTIPATH DM_MULTIPATH_QL DM_MULTIPATH_ST DM_PERSISTENT_DATA DM_RAID DM_SNAPSHOT DM_THIN_PROVISIONING DM_UEVENT DM_VERITY DM_VERITY_FEC DM_WRITECACHE DM_ZONED DRAGONRISE_FF DRM DRM_AUX_BRIDGE DRM_BOCHS DRM_BRIDGE DRM_BUDDY DRM_CIRRUS_QEMU DRM_CLIENT DRM_CLIENT_DEFAULT_FBDEV DRM_CLIENT_LIB DRM_CLIENT_SELECTION DRM_CLIENT_SETUP DRM_DEBUG_MM DRM_DISPLAY_DP_AUX_BUS DRM_DISPLAY_DP_HELPER DRM_DISPLAY_DSC_HELPER DRM_DISPLAY_HELPER DRM_FBDEV_EMULATION ENCRYPTED_KEYS FSCACHE FUSE_FS GPIOLIB HAMRADIO HID_DRAGONRISE IIO INFINIBAND INFINIBAND_ADDR_TRANS INFINIBAND_RTRS_CLIENT IOSCHED_BFQ LIBNVDIMM MAC80211 MAC80211_DEBUGFS MAC80211_LEDS MEDIA_SUPPORT MEMORY_HOTPLUG MEMORY_HOTREMOVE MFD_DLN2 MMC MTD NET_CLS_U32 NET_SCH_DEFAULT PARTITION_ADVANCED RFKILL SERIAL_DEV_BUS TLS TLS_DEVICE TRANSPARENT_HUGEPAGE TRUSTED_KEYS USB_GADGET USB_PHY VLAN_8021Q WANT_COMPAT_NETLINK_MESSAGES WEXT_CORE WIRELESS WLAN WLAN_VENDOR_ATH ZONE_DEVICE] disabling configs for [BUG KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], 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: 2e88df3f9c572458aa8f4ad4329d4f0778bdf0dc842a1b01ebdaf91bcb5ad4bb all runs: OK false negative chance: 0.000 # git bisect start 4cb6c8af8591135ec000fbe4bb474139ceec595d 0ff41df1cb268fc69e703a08a57ee14ae967d0ca Bisecting: 4785 revisions left to test after this (roughly 12 steps) [b08494a8f7416e5f09907318c5460ad6f6e2a548] Merge tag 'drm-next-2025-05-28' of https://gitlab.freedesktop.org/drm/kernel testing commit b08494a8f7416e5f09907318c5460ad6f6e2a548 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 1480886afac6d1d09508a6dc562a3d8a54d3ab5d5985f0426ba5d33aabd6a51c all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in mempool_alloc_noprof representative crash: BUG: unable to handle kernel NULL pointer dereference in mempool_alloc_noprof, types: [UNKNOWN] # git bisect bad b08494a8f7416e5f09907318c5460ad6f6e2a548 Bisecting: 2711 revisions left to test after this (roughly 12 steps) [a9e6060bb2a6cae6d43a98ec0794844ad01273d3] Merge tag 'sound-6.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound testing commit a9e6060bb2a6cae6d43a98ec0794844ad01273d3 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 4ea2ad742e96f85eb55e9e4311d44bddfca39955418ea6824a06cf8cbb54a240 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in mempool_alloc_noprof representative crash: BUG: unable to handle kernel NULL pointer dereference in mempool_alloc_noprof, types: [UNKNOWN] # git bisect bad a9e6060bb2a6cae6d43a98ec0794844ad01273d3 Bisecting: 1435 revisions left to test after this (roughly 11 steps) [3349ada3cffdbe4579872a004360daa31938f683] Merge tag 'powerpc-6.16-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux testing commit 3349ada3cffdbe4579872a004360daa31938f683 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 655db136a10651888c8eab52137c702fa999d937527f6a6706ec8e17244b06fc all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in mempool_alloc_noprof representative crash: BUG: unable to handle kernel NULL pointer dereference in mempool_alloc_noprof, types: [UNKNOWN] # git bisect bad 3349ada3cffdbe4579872a004360daa31938f683 Bisecting: 828 revisions left to test after this (roughly 10 steps) [8fdabcd9c01d9ac585d8109a921e0734a69479fb] Merge tag 'gfs2-for-6.16' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2 testing commit 8fdabcd9c01d9ac585d8109a921e0734a69479fb gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: ee3b2b852f9abec4c498bbac3f392d9bdc8339c2453454dcca9cca3dc1ed5848 all runs: OK false negative chance: 0.000 # git bisect good 8fdabcd9c01d9ac585d8109a921e0734a69479fb Bisecting: 441 revisions left to test after this (roughly 9 steps) [2297554f01df6d3d4e98a3915c183ce3e491740a] x86/fpu: Fix irq_fpu_usable() to return false during CPU onlining testing commit 2297554f01df6d3d4e98a3915c183ce3e491740a gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 9fc7fe65cd02d99bf5cbe732682b6b28a8ca4a33d1f02a9cf6480d7ae2e3f90f all runs: OK false negative chance: 0.000 # git bisect good 2297554f01df6d3d4e98a3915c183ce3e491740a Bisecting: 222 revisions left to test after this (roughly 8 steps) [522544fc71c27b4b432386c7919f71ecc79a3bfb] Merge tag 'bcachefs-2025-05-24' of git://evilpiepirate.org/bcachefs testing commit 522544fc71c27b4b432386c7919f71ecc79a3bfb gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: d76e58d9f0b757b56707cb26c2416e0785130ea14048c1e46362447f9de6b5ed all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in mempool_alloc_noprof representative crash: BUG: unable to handle kernel NULL pointer dereference in mempool_alloc_noprof, types: [UNKNOWN] # git bisect bad 522544fc71c27b4b432386c7919f71ecc79a3bfb Bisecting: 109 revisions left to test after this (roughly 7 steps) [7b8c41c178742c680e6acb610a760f9e007cfeac] bcachefs: Add comments for inode snapshot requirements testing commit 7b8c41c178742c680e6acb610a760f9e007cfeac gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: e629e87200789813b4bc17025f03c9a6a590967bf49ad23ebde239d27f5e8402 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in mempool_alloc_noprof representative crash: BUG: unable to handle kernel NULL pointer dereference in mempool_alloc_noprof, types: [UNKNOWN] # git bisect bad 7b8c41c178742c680e6acb610a760f9e007cfeac Bisecting: 54 revisions left to test after this (roughly 6 steps) [bdad8962c94d3e557317b3d0691a507177f27a22] bcachefs: Flag for repair on missing subvolume testing commit bdad8962c94d3e557317b3d0691a507177f27a22 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 10e172fe3abe1f28b4514a45b4bc1c8a8bb471c3c039073b921c60e3b5b0a465 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in mempool_alloc_noprof representative crash: BUG: unable to handle kernel NULL pointer dereference in mempool_alloc_noprof, types: [UNKNOWN] # git bisect bad bdad8962c94d3e557317b3d0691a507177f27a22 Bisecting: 26 revisions left to test after this (roughly 5 steps) [31813dcf379d7fc513530e3a9cf7b60cd2aa2a9d] bcachefs: alphabetize init function calls testing commit 31813dcf379d7fc513530e3a9cf7b60cd2aa2a9d gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 894c1e98b1e9445a322689e8fe86fc53469b5f0708d3c3740ef8997018afcde4 all runs: OK false negative chance: 0.000 # git bisect good 31813dcf379d7fc513530e3a9cf7b60cd2aa2a9d Bisecting: 13 revisions left to test after this (roughly 4 steps) [03f8f9a1292ed3a7160a497f7a36a37d0062b1ca] bcachefs: bch2_dev_allocator_set_rw() testing commit 03f8f9a1292ed3a7160a497f7a36a37d0062b1ca gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 9a068f74ee68e8605b787f2b5a549584310feae86cbea6a5d376ca63502d9a21 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in mempool_alloc_noprof representative crash: BUG: unable to handle kernel NULL pointer dereference in mempool_alloc_noprof, types: [UNKNOWN] # git bisect bad 03f8f9a1292ed3a7160a497f7a36a37d0062b1ca Bisecting: 6 revisions left to test after this (roughly 3 steps) [dd1b99f7060f781bea9973036ee96daa856f08c0] bcachefs: indent error messages of invalid compression testing commit dd1b99f7060f781bea9973036ee96daa856f08c0 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 79335922816dc598c2b7a8c292f9a672fcb56d37cfc2c1b6148b37980e47f971 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in mempool_alloc_noprof representative crash: BUG: unable to handle kernel NULL pointer dereference in mempool_alloc_noprof, types: [UNKNOWN] # git bisect bad dd1b99f7060f781bea9973036ee96daa856f08c0 Bisecting: 2 revisions left to test after this (roughly 2 steps) [3a2a0d08b225047ac1d2504059c45a5acf8072b8] bcachefs: move_data_phys: stats are not required testing commit 3a2a0d08b225047ac1d2504059c45a5acf8072b8 gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: cb53daa1bef50d9458cf634c2c552452c1a62b0b4e1dc6c4aab44c035eb527a5 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in mempool_alloc_noprof representative crash: BUG: unable to handle kernel NULL pointer dereference in mempool_alloc_noprof, types: [UNKNOWN] # git bisect bad 3a2a0d08b225047ac1d2504059c45a5acf8072b8 Bisecting: 0 revisions left to test after this (roughly 1 step) [d4d71b58e5139afc5f9bda0139b99404eb216d8a] bcachefs: RO mounts now use less memory testing commit d4d71b58e5139afc5f9bda0139b99404eb216d8a gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 13732231aa82520c0ba2218abbd35ab45b4a72d39ffa8259677f395746e22d61 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in mempool_alloc_noprof representative crash: BUG: unable to handle kernel NULL pointer dereference in mempool_alloc_noprof, types: [UNKNOWN] # git bisect bad d4d71b58e5139afc5f9bda0139b99404eb216d8a Bisecting: 0 revisions left to test after this (roughly 0 steps) [a17e985be9831bf866795fe5e3da219d2061ce6c] bcachefs: Move various init code to _init_early() testing commit a17e985be9831bf866795fe5e3da219d2061ce6c gcc compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 kernel signature: 9f801112cebd76588356aa50f4cdc8d3b4802cde118557a4b97c3ac1c02e0a56 all runs: OK false negative chance: 0.000 # git bisect good a17e985be9831bf866795fe5e3da219d2061ce6c d4d71b58e5139afc5f9bda0139b99404eb216d8a is the first bad commit commit d4d71b58e5139afc5f9bda0139b99404eb216d8a Author: Kent Overstreet Date: Sat Apr 5 17:36:04 2025 -0400 bcachefs: RO mounts now use less memory Defer memory allocations only needed in RW mode until we actually go RW. This is part of improved support for RO images. Signed-off-by: Kent Overstreet fs/bcachefs/bcachefs.h | 1 + fs/bcachefs/io_read.c | 8 ++++++++ fs/bcachefs/io_write.c | 8 -------- fs/bcachefs/super.c | 51 ++++++++++++++++++++++++++++++++++---------------- 4 files changed, 44 insertions(+), 24 deletions(-) accumulated error probability: 0.00 culprit signature: 13732231aa82520c0ba2218abbd35ab45b4a72d39ffa8259677f395746e22d61 parent signature: 9f801112cebd76588356aa50f4cdc8d3b4802cde118557a4b97c3ac1c02e0a56 revisions tested: 22, total time: 5h0m55.25848066s (build: 2h17m8.387643521s, test: 2h23m3.949619305s) first bad commit: d4d71b58e5139afc5f9bda0139b99404eb216d8a bcachefs: RO mounts now use less memory recipients (to): ["kent.overstreet@linux.dev"] recipients (cc): [] crash: BUG: unable to handle kernel NULL pointer dereference in mempool_alloc_noprof BUG: kernel NULL pointer dereference, address: 0000000000000000 #PF: supervisor instruction fetch in kernel mode #PF: error_code(0x0010) - not-present page PGD 8000000103f82067 P4D 8000000103f82067 PUD 0 Oops: Oops: 0010 [#1] SMP PTI CPU: 1 UID: 0 PID: 3355 Comm: syz.2.17 Not tainted 6.15.0-rc4-syzkaller #0 PREEMPT(undef) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:0x0 Code: Unable to access opcode bytes at 0xffffffffffffffd6. RSP: 0018:ffffc900032e36e8 EFLAGS: 00010206 RAX: 0000000000000000 RBX: ffff888175903d30 RCX: 0000000000000c40 RDX: c9b4080d09c2b886 RSI: 0000000000000000 RDI: 0000000000092800 RBP: 0000000000000c40 R08: 0000000000000000 R09: 00000000000000a5 R10: 0000000000000003 R11: 0000000000000000 R12: 0000000000000004 R13: 0000000000000010 R14: 0000000000092c40 R15: 0000000000092800 FS: 0000000000000000(0000) GS:ffff8882b32e9000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 0000000104fa0000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: mempool_alloc_noprof+0x8e/0x1e0 mm/mempool.c:402 bch2_btree_update_start+0x369/0x830 fs/bcachefs/btree_update_interior.c:1187 bch2_btree_node_rewrite+0x72/0x510 fs/bcachefs/btree_update_interior.c:2199 bch2_move_btree+0x402/0x530 fs/bcachefs/move.c:1023 bch2_scan_old_btree_nodes+0x8d/0x150 fs/bcachefs/move.c:1145 bch2_data_job+0x16d/0x4e0 fs/bcachefs/move.c:1283 bch2_data_thread+0x31/0x70 fs/bcachefs/chardev.c:315 kthread+0x200/0x230 kernel/kthread.c:464 ret_from_fork+0x32/0x40 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Modules linked in: CR2: 0000000000000000 ---[ end trace 0000000000000000 ]--- RIP: 0010:0x0 Code: Unable to access opcode bytes at 0xffffffffffffffd6. RSP: 0018:ffffc900032e36e8 EFLAGS: 00010206 RAX: 0000000000000000 RBX: ffff888175903d30 RCX: 0000000000000c40 RDX: c9b4080d09c2b886 RSI: 0000000000000000 RDI: 0000000000092800 RBP: 0000000000000c40 R08: 0000000000000000 R09: 00000000000000a5 R10: 0000000000000003 R11: 0000000000000000 R12: 0000000000000004 R13: 0000000000000010 R14: 0000000000092c40 R15: 0000000000092800 FS: 0000000000000000(0000) GS:ffff8882b32e9000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 0000000104fa0000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400