ci starts bisection 2025-10-28 18:10:47.613695327 +0000 UTC m=+94490.404836566 bisecting cause commit starting from 72fb0170ef1f45addf726319c52a0562b6913707 building syzkaller on c0460fcde7051a8d07612ec2a17718d3c3019bb0 fetch other tags and check if the commit is present ensuring issue is reproducible on original commit 72fb0170ef1f45addf726319c52a0562b6913707 testing commit 72fb0170ef1f45addf726319c52a0562b6913707 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 7bd6f28a16e1be44cdf77234ba965af039057ef0d0a2724668946e51c4669cec all runs: crashed: INFO: task hung in io_uring_del_tctx_node representative crash: INFO: task hung in io_uring_del_tctx_node, types: [HANG] check whether we can drop unnecessary instrumentation disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed testing commit 72fb0170ef1f45addf726319c52a0562b6913707 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 1a69d6bf104cb84beab661e3a4afee4b7c01dc7cbab02322739c1c421e412d2c all runs: crashed: INFO: task hung in io_uring_del_tctx_node representative crash: INFO: task hung in io_uring_del_tctx_node, types: [HANG] the bug reproduces without the instrumentation disabling configs for [bug_or_warning kasan locking atomic_sleep memleak ubsan], they are not needed kconfig minimization: base=4116 full=8534 leaves diff=2156 split chunks (needed=false): <2156> split chunk #0 of len 2156 into 5 parts testing without sub-chunk 1/5 disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed testing commit 72fb0170ef1f45addf726319c52a0562b6913707 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 3185c7e9be1fb06c896c19ff493feb1f19faf9a57e4a77cea56af9b994111c86 all runs: crashed: INFO: task hung in io_uring_del_tctx_node representative crash: INFO: task hung in io_uring_del_tctx_node, types: [HANG] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed testing commit 72fb0170ef1f45addf726319c52a0562b6913707 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: b1142ec53d6f21b983d65d353df0741e2103b02e3ea2ead6594924a93f6fbace all runs: crashed: INFO: task hung in io_uring_del_tctx_node representative crash: INFO: task hung in io_uring_del_tctx_node, types: [HANG] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [kasan locking atomic_sleep memleak ubsan bug_or_warning], they are not needed testing commit 72fb0170ef1f45addf726319c52a0562b6913707 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: dea5f34d4719d7688cf2a2a6e660c95227968962b7edd2c7b48d1199c75e0cc3 all runs: crashed: INFO: task hung in io_uring_del_tctx_node representative crash: INFO: task hung in io_uring_del_tctx_node, types: [HANG] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [atomic_sleep memleak ubsan bug_or_warning kasan locking], they are not needed testing commit 72fb0170ef1f45addf726319c52a0562b6913707 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: ecbec3d5233e20ea5006023a6b0f2c2b583f40f1d1421e980ccf41d55dda025d run #0: crashed: BUG: unable to handle kernel NULL pointer dereference in ip6_pol_route run #1: crashed: BUG: soft lockup in seq_read run #2: basic kernel testing failed: failed to copy binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "/tmp/syz-executor3577936195" "root@10.128.1.76:./syz-executor3577936195"]: exit status 255 run #3: basic kernel testing failed: failed to copy binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "/tmp/syz-executor251407998" "root@10.128.1.154:./syz-executor251407998"]: exit status 255 run #4: basic kernel testing failed: failed to copy binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "/tmp/syz-executor526899674" "root@10.128.1.254:./syz-executor526899674"]: exit status 255 run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK representative crash: BUG: unable to handle kernel NULL pointer dereference in ip6_pol_route, types: [NULL-POINTER-DEREFERENCE HANG] testing without sub-chunk 5/5 disabling configs for [kasan locking atomic_sleep memleak ubsan bug_or_warning], they are not needed testing commit 72fb0170ef1f45addf726319c52a0562b6913707 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: e86c72fd2110e8818c7fa28bf0db16082f23020e89a7bd78328d04a32ac1aef3 all runs: crashed: INFO: task hung in io_uring_del_tctx_node representative crash: INFO: task hung in io_uring_del_tctx_node, types: [HANG] the chunk can be dropped minimized to 432 configs; suspects: [AF_RXRPC ARCH_ENABLE_MEMORY_HOTREMOVE ATM AX25 BT BT_BREDR BT_HIDP BXT_WC_PMIC_OPREGION CFG80211 CMA DAX DIBS DLM DMABUF_HEAPS DRM DVB_CORE ENCRYPTED_KEYS EXTCON GENEVE GPIOLIB HAMRADIO HAVE_CLK HID_NINTENDO HID_NVIDIA_SHIELD HID_PLAYSTATION HID_SENSOR_HUB HID_SMARTJOYPLUS HID_STEAM HID_THRUSTMASTER IIO INFINIBAND INFINIBAND_ADDR_TRANS INFINIBAND_IPOIB INFINIBAND_USER_ACCESS INFINIBAND_VIRT_DMA INPUT_TABLET INPUT_TOUCHSCREEN INTEL_SCU_IPC INTEL_SOC_PMIC_BXTWC IP_SCTP L2TP LEDS_CLASS_MULTICOLOR LIBNVDIMM MAC80211 MEDIA_COMMON_OPTIONS MEDIA_DIGITAL_TV_SUPPORT MEDIA_PLATFORM_SUPPORT MEDIA_RADIO_SUPPORT MEDIA_SDR_SUPPORT MEDIA_SUPPORT MEDIA_USB_SUPPORT MEMORY_HOTPLUG MEMORY_HOTREMOVE MFD_DLN2 MFD_INTEL_PMC_BXT MFD_MT6360 MFD_MT6370 MFD_RETU MMC MTD MTD_UBI NETFILTER_ADVANCED NETFILTER_CONNCOUNT NET_IPGRE NET_IPGRE_DEMUX NFS_V4_1 NF_CONNTRACK_SNMP NF_DUP_IPV4 NF_DUP_IPV6 NF_DUP_NETDEV NF_FLOW_TABLE NF_FLOW_TABLE_INET NF_NAT_AMANDA NF_NAT_H323 NF_NAT_OVS NF_NAT_PPTP NF_NAT_REDIRECT NF_NAT_SNMP_BASIC NF_NAT_TFTP NF_SOCKET_IPV4 NF_SOCKET_IPV6 NF_TABLES NF_TABLES_NETDEV NF_TPROXY_IPV4 NF_TPROXY_IPV6 NILFS2_FS NINTENDO_FF NLMON NLS_CODEPAGE_1250 NLS_CODEPAGE_1251 NLS_CODEPAGE_737 NLS_CODEPAGE_775 NLS_CODEPAGE_850 NLS_CODEPAGE_852 NLS_CODEPAGE_855 NLS_CODEPAGE_857 NLS_CODEPAGE_860 NLS_CODEPAGE_861 NLS_CODEPAGE_862 NLS_CODEPAGE_863 NLS_CODEPAGE_864 NLS_CODEPAGE_865 NLS_CODEPAGE_866 NLS_CODEPAGE_869 NLS_CODEPAGE_874 NLS_CODEPAGE_932 NLS_CODEPAGE_936 NLS_CODEPAGE_949 NLS_CODEPAGE_950 NLS_ISO8859_13 NLS_ISO8859_14 NLS_ISO8859_15 NLS_ISO8859_2 NLS_ISO8859_3 NLS_ISO8859_4 NLS_ISO8859_5 NLS_ISO8859_6 NLS_ISO8859_7 NLS_ISO8859_8 NLS_ISO8859_9 NLS_KOI8_R NLS_KOI8_U NLS_MAC_CELTIC NLS_MAC_CENTEURO NLS_MAC_CROATIAN NLS_MAC_CYRILLIC NLS_MAC_GAELIC NLS_MAC_GREEK NLS_MAC_ICELAND NLS_MAC_INUIT NLS_MAC_ROMAN NLS_MAC_ROMANIAN NLS_MAC_TURKISH NLS_UCS2_UTILS NOZOMI NTFS3_FS NTFS3_FS_POSIX_ACL NTFS3_LZX_XPRESS NULL_TTY NUMA_BALANCING NUMA_BALANCING_DEFAULT_ENABLED NUMA_EMU NUMA_KEEP_MEMINFO NVDIMM_DAX NVDIMM_KEYS NVDIMM_PFN NVIDIA_SHIELD_FF NVME_CORE NVME_FABRICS NVME_FC NVME_MULTIPATH NVME_RDMA NVME_TARGET NVME_TARGET_FC NVME_TARGET_FCLOOP NVME_TARGET_LOOP NVME_TARGET_RDMA NVME_TARGET_TCP NVME_TCP N_GSM N_HDLC OCFS2_DEBUG_FS OCFS2_FS OCFS2_FS_O2CB OCFS2_FS_STATS OCFS2_FS_USERSPACE_CLUSTER OF_GPIO OF_PMEM OMFS_FS OPENVSWITCH OPENVSWITCH_GENEVE OPENVSWITCH_GRE OPENVSWITCH_VXLAN OPTEE_STATIC_PROTMEM_POOL ORANGEFS_FS OSF_PARTITION OVERLAY_FS OVERLAY_FS_DEBUG OVERLAY_FS_INDEX OVERLAY_FS_REDIRECT_ALWAYS_FOLLOW OVERLAY_FS_REDIRECT_DIR PACKET_DIAG PAGE_IDLE_FLAG PAGE_REPORTING PAHOLE_HAS_BTF_TAG PAHOLE_HAS_LANG_EXCLUDE PAHOLE_HAS_SPLIT_BTF PARPORT PARPORT_NOT_PC PARTITION_ADVANCED PCCARD PCCARD_NONSTATIC PCIEAER PCI_ENDPOINT PCI_IOV PCMCIA PCMCIA_LOAD_CIS PERCPU_STATS PERSISTENT_KEYRINGS PHYLINK PHY_CPCAP_USB PHY_QCOM_USB_HS PHY_QCOM_USB_HSIC PHY_SAMSUNG_USB2 PHY_TUSB1210 PKCS7_TEST_KEY PKCS8_PRIVATE_KEY_PARSER PLAYSTATION_FF PLFXLC PMIC_OPREGION PM_CLK PNFS_BLOCK PNFS_FILE_LAYOUT PNFS_FLEXFILE_LAYOUT POSIX_AUX_CLOCKS PPP PPPOATM PPPOE PPPOE_HASH_BITS_1 PPPOL2TP PPP_ASYNC PPP_BSDCOMP PPP_DEFLATE PPP_FILTER PPP_MPPE PPP_MULTILINK PPP_SYNC_TTY PPTP PREEMPT PREEMPT_NOTIFIERS PROC_CHILDREN PSAMPLE PSI PSTORE PSTORE_COMPRESS QCOM_QMI_HELPERS QNX4FS_FS QNX6FS_FS QRTR QRTR_TUN RADIO_ADAPTERS RADIO_SHARK RADIO_SHARK2 RADIO_TEA575X RAID6_PQ RAID_ATTRS RC_ATI_REMOTE RC_CORE RC_DEVICES RC_XBOX_DVD RDMA_RXE RDMA_SIW RDS RDS_RDMA RDS_TCP READ_ONLY_THP_FOR_FS REALTEK_AUTOPM REED_SOLOMON REED_SOLOMON_DEC8 REGMAP REGMAP_I2C REGMAP_IRQ REGMAP_MMIO REGMAP_SPI REGULATOR REGULATOR_FIXED_VOLTAGE REGULATOR_TWL4030 RESET_CONTROLLER RFKILL RFKILL_INPUT RFKILL_LEDS RMI4_2D_SENSOR RMI4_CORE RMI4_F03 RMI4_F03_SERIO RMI4_F11 RMI4_F12 RMI4_F30 RMI4_F3A ROMFS_BACKED_BY_BOTH ROMFS_FS ROMFS_ON_BLOCK ROMFS_ON_MTD ROSE RTC_DRV_HID_SENSOR_TIME RXKAD SCHED_CORE SCREEN_INFO SCSI_FC_ATTRS SCSI_HPSA SCSI_ISCSI_ATTRS SCSI_LOGGING SCSI_NETLINK SCSI_SAS_ATA SCSI_SAS_ATTRS SCSI_SAS_LIBSAS SCSI_SCAN_ASYNC SCSI_SRP_ATTRS SCTP_DEFAULT_COOKIE_HMAC_SHA256 SECONDARY_TRUSTED_KEYRING SECURITY_INFINIBAND SECURITY_NETWORK_XFRM SENSORS_AQUACOMPUTER_D5NEXT SENSORS_CORSAIR_CPRO SENSORS_CORSAIR_PSU SENSORS_GIGABYTE_WATERFORCE SENSORS_NZXT_KRAKEN2 SENSORS_NZXT_SMART2 SENSORS_POWERZ SERIAL_DEV_BUS SERIAL_DEV_CTRL_TTYPORT SERIAL_MCTRL_GPIO SGI_PARTITION SIGNATURE SIGNED_PE_FILE_VERIFICATION SKB_DECRYPTED SLHC SLIP SLIP_COMPRESSED SLIP_MODE_SLIP6 SLIP_SMART SMARTJOYPLUS_FF SMBFS SMB_SERVER SMC SMC_DIAG SMSC_PHY SMS_SDIO_DRV SMS_SIANO_DEBUGFS SMS_SIANO_MDTV SMS_SIANO_RC SMS_USB_DRV SND SND_ALOOP SND_BCD2000 SND_CTL_FAST_LOOKUP SND_CTL_LED SND_DEBUG SND_DMA_SGBUF SND_DRIVERS SND_DUMMY SND_HDA SND_HDA_CODEC_ANALOG SND_HDA_CODEC_CA0110 SND_HDA_CODEC_CA0132 SND_HDA_CODEC_CIRRUS SND_HDA_CODEC_CMEDIA SND_HDA_CODEC_CONEXANT SND_HDA_CODEC_HDMI SND_HDA_CODEC_REALTEK SND_HDA_CODEC_SI3054 SND_HDA_CODEC_SIGMATEL SND_HDA_CODEC_VIA SND_HDA_COMPONENT SND_HDA_CORE SND_HDA_GENERIC SND_HDA_GENERIC_LEDS SND_HDA_HWDEP SND_HDA_I915 SND_HDA_INPUT_BEEP SND_HDA_INTEL SND_HDA_PATCH_LOADER SND_HDA_RECONFIG SND_HRTIMER SND_HWDEP SND_INTEL_DSP_CONFIG SND_INTEL_NHLT SND_INTEL_SOUNDWIRE_ACPI SND_JACK SND_JACK_INPUT_DEV SND_MIXER_OSS SND_OSSEMUL SND_PCI SND_PCM SND_PCMCIA SND_PCM_OSS SND_PCM_OSS_PLUGINS SND_PCM_TIMER SND_PCM_XRUN_DEBUG SND_PROC_FS SND_RAWMIDI SND_SEQUENCER SND_SEQUENCER_OSS SND_SEQ_DEVICE SND_SEQ_DUMMY SND_SEQ_HRTIMER_DEFAULT SND_SEQ_MIDI SND_SEQ_MIDI_EVENT SND_SEQ_VIRMIDI SND_SOC SND_SOC_I2C_AND_SPI SND_SOC_SDCA_OPTIONAL SND_SUPPORT_OLD_API SND_TIMER SND_UMP SND_UMP_LEGACY_RAWMIDI SND_USB SND_USB_6FIRE SND_USB_AUDIO SND_USB_AUDIO_MIDI_V2 SND_USB_AUDIO_USE_MEDIA_CONTROLLER SND_USB_CAIAQ SND_USB_CAIAQ_INPUT SND_USB_HIFACE SND_USB_LINE6 SND_USB_POD SND_USB_PODHD SND_USB_TONEPORT SND_USB_UA101 SND_USB_US122L SND_USB_USX2Y SND_USB_VARIAX SND_VERBOSE_PROCFS SND_VIRMIDI SND_VIRTIO SND_VMASTER SND_X86 SOCK_VALIDATE_XMIT SOLARIS_X86_PARTITION SONY_FF SOUND SOUNDWIRE SOUND_OSS_CORE SOUND_OSS_CORE_PRECLAIM SPI SPI_DLN2 SPI_DYNAMIC SPI_LJCA SPI_MASTER SQUASHFS SQUASHFS_4K_DEVBLK_SIZE SQUASHFS_COMPILE_DECOMP_MULTI SQUASHFS_DECOMP_MULTI SQUASHFS_FILE_DIRECT SQUASHFS_LZ4 SQUASHFS_LZO SQUASHFS_XATTR SQUASHFS_XZ SQUASHFS_ZLIB SQUASHFS_ZSTD SSB SSB_PCIHOST_POSSIBLE SSB_PCMCIAHOST_POSSIBLE SSB_SDIOHOST_POSSIBLE STEAM_FF STP STREAM_PARSER SUNRPC_BACKCHANNEL SUN_PARTITION SURFACE_AGGREGATOR SURFACE_AGGREGATOR_BUS SURFACE_AGGREGATOR_REGISTRY SURFACE_HID SURFACE_HID_CORE SURFACE_KBD SW_SYNC SYSFB SYSFS_SYSCALL SYSV68_PARTITION TABLET_USB_ACECAD TABLET_USB_AIPTEK TABLET_USB_HANWANG TABLET_USB_KBTAB TABLET_USB_PEGASUS TAHVO_USB TAHVO_USB_HOST_BY_DEFAULT TCG_CRB TCG_TIS TCG_TIS_CORE TCG_TPM TCP_CONG_BBR TCP_CONG_BIC TCP_CONG_CDG TCP_CONG_DCTCP TCP_CONG_HSTCP TCP_CONG_HTCP TCP_CONG_HYBLA TCP_CONG_ILLINOIS TCP_CONG_LP TCP_CONG_NV TCP_CONG_SCALABLE TCP_CONG_VEGAS TCP_CONG_VENO TCP_CONG_WESTWOOD TCP_CONG_YEAH TEE TEE_DMABUF_HEAPS TEXTSEARCH TEXTSEARCH_BM TEXTSEARCH_FSM TEXTSEARCH_KMP THP_SWAP THRUSTMASTER_FF TIPC TIPC_CRYPTO TIPC_DIAG TIPC_MEDIA_IB TIPC_MEDIA_UDP TLS TLS_TOE TMPFS_QUOTA TOOLS_SUPPORT_RELR TOUCHSCREEN_SUR40 TOUCHSCREEN_USB_3M TOUCHSCREEN_USB_COMPOSITE TOUCHSCREEN_USB_DMC_TSC10 TOUCHSCREEN_USB_E2I TOUCHSCREEN_USB_EASYTOUCH TOUCHSCREEN_USB_EGALAX TOUCHSCREEN_USB_ELO TOUCHSCREEN_USB_ETT_TC45USB TOUCHSCREEN_USB_ETURBO TOUCHSCREEN_USB_GENERAL_TOUCH TOUCHSCREEN_USB_GOTOP TOUCHSCREEN_USB_GUNZE TOUCHSCREEN_USB_IDEALTEK TOUCHSCREEN_USB_IRTOUCH TOUCHSCREEN_USB_ITM TOUCHSCREEN_USB_JASTEC TOUCHSCREEN_USB_NEXIO TOUCHSCREEN_USB_PANJIT TOUCHSCREEN_USB_ZYTRONIC TRANSPARENT_HUGEPAGE TRANSPARENT_HUGEPAGE_MADVISE TTPCI_EEPROM TTY_PRINTK TUN_VNET_CROSS_LE TWL4030_CORE TYPEC TYPEC_ANX7411 TYPEC_DP_ALTMODE TYPEC_FUSB302 TYPEC_HD3SS3220 TYPEC_MT6360 TYPEC_MUX_FSA4480 TYPEC_MUX_GPIO_SBU TYPEC_MUX_INTEL_PMC TYPEC_MUX_NB7VPQ904M TYPEC_MUX_PTN36502 TYPEC_MUX_WCD939X_USBSS TYPEC_NVIDIA_ALTMODE TYPEC_RT1711H TYPEC_RT1719 TYPEC_STUSB160X TYPEC_TCPCI TYPEC_TCPCI_MAXIM TYPEC_TCPCI_MT6370 TYPEC_TCPM TYPEC_TPS6598X TYPEC_UCSI TYPEC_WCOVE TYPEC_WUSB3801 UBIFS_ATIME_SUPPORT UBIFS_FS UBIFS_FS_ADVANCED_COMPR UBIFS_FS_LZO UBIFS_FS_SECURITY UBIFS_FS_XATTR UBIFS_FS_ZLIB UBIFS_FS_ZSTD UCSI_ACPI UCSI_CCG UCSI_STM32G0 UDF_FS UDMABUF UFS_FS UFS_FS_WRITE UHID ULTRIX_PARTITION UNICODE UNIXWARE_DISKLABEL UNIX_DIAG USB4 USB4_NET USBIP_CORE USBIP_HOST USBIP_VHCI_HCD USBIP_VUDC USBPCWATCHDOG USB_ACM USB_ADUTUX USB_AIRSPY USB_ALI_M5632 USB_AN2720 USB_DWC2 USB_GADGET USB_LJCA USB_MUSB_HDRC USB_NET_CDC_SUBSET USB_ROLE_SWITCH USB_STORAGE_REALTEK USB_ULPI_BUS USB_USBNET VIDEO_DEV VXLAN WIRELESS WLAN WLAN_VENDOR_PURELIFI ZONE_DEVICE] disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed picked [v6.17 v6.16 v6.15 v6.13 v6.11 v6.9 v6.7 v6.5 v6.2 v5.19 v5.16 v5.13 v5.10 v5.7 v5.4 v5.1 v4.19] out of 40 release tags testing release v6.17 testing commit e5f0a698b34ed76002dc5cff3804a61c80233a7a gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 63f233a9cff5a0fe55d8c6d286367afdb5cb4c897a43bf0d26c9adb5781c004b all runs: OK false negative chance: 0.000 # git bisect start 72fb0170ef1f45addf726319c52a0562b6913707 e5f0a698b34ed76002dc5cff3804a61c80233a7a Bisecting: 8721 revisions left to test after this (roughly 13 steps) [24d9e8b3c9c8a6f72c8b4c196a703e144928d919] Merge tag 'slab-for-6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab testing commit 24d9e8b3c9c8a6f72c8b4c196a703e144928d919 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 0bdda9fd33adfdbd8dd2deddf7bec51893112fa0aa38344ceaf6f5ae67d3207c all runs: OK false negative chance: 0.000 # git bisect good 24d9e8b3c9c8a6f72c8b4c196a703e144928d919 Bisecting: 4359 revisions left to test after this (roughly 12 steps) [9f388a653c8a481cbdbdedca081a1f9f3ba204a2] Merge tag 'for-6.18-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux testing commit 9f388a653c8a481cbdbdedca081a1f9f3ba204a2 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 31d4e57ec8128091342360af69d07fae6252c4bf5822768a85b61de6ea31bc7c all runs: OK false negative chance: 0.000 # git bisect good 9f388a653c8a481cbdbdedca081a1f9f3ba204a2 Bisecting: 2167 revisions left to test after this (roughly 11 steps) [39357b7e965a4bd77fa901064393c8585ad65bc3] Merge branch 'master' of https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git testing commit 39357b7e965a4bd77fa901064393c8585ad65bc3 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 6d865088ef4e809b36bc3551b3c76474a17cb83cb6a4a992ac36cc1fff7eeb26 all runs: OK false negative chance: 0.000 # git bisect good 39357b7e965a4bd77fa901064393c8585ad65bc3 Bisecting: 1004 revisions left to test after this (roughly 10 steps) [d8c9ea89a63db93dca1d53146a7be4d9f610011d] Merge branch 'for-next' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git testing commit d8c9ea89a63db93dca1d53146a7be4d9f610011d gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 31e6e00d0fec0c419b660c3508a7f0b348a49267cfa44f48fff164994717a789 all runs: OK false negative chance: 0.000 # git bisect good d8c9ea89a63db93dca1d53146a7be4d9f610011d Bisecting: 513 revisions left to test after this (roughly 9 steps) [507b31122bfd632e1c87737cf18ca00aec022be4] Merge branch 'for-next' of https://git.kernel.org/pub/scm/linux/kernel/git/tj/wq.git testing commit 507b31122bfd632e1c87737cf18ca00aec022be4 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 8b29a8ac0101b272c3a4ea5392ae87550a2de8f4dc88e8c30fe2af3f70d37850 all runs: crashed: INFO: task hung in io_uring_del_tctx_node representative crash: INFO: task hung in io_uring_del_tctx_node, types: [HANG] # git bisect bad 507b31122bfd632e1c87737cf18ca00aec022be4 Bisecting: 271 revisions left to test after this (roughly 8 steps) [c3152bb59de6f942f6c8d01d00f82e24e5d5ae3f] Merge branch 'for-next' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git testing commit c3152bb59de6f942f6c8d01d00f82e24e5d5ae3f gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 8ce45a117cf30380c858c5716390c54ad17e4454a674fbf26c7a7301980e36ad all runs: crashed: INFO: task hung in io_uring_del_tctx_node representative crash: INFO: task hung in io_uring_del_tctx_node, types: [HANG] # git bisect bad c3152bb59de6f942f6c8d01d00f82e24e5d5ae3f Bisecting: 114 revisions left to test after this (roughly 7 steps) [f727f0534512baab56c70a90b92c7695c0d44ca7] Merge branch 'for-mfd-next' of https://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd.git testing commit f727f0534512baab56c70a90b92c7695c0d44ca7 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: e040c05b784ed4b8cdcde3bc931cd864b6a191538b0ddbad86db97367891971f all runs: crashed: INFO: task hung in io_uring_del_tctx_node representative crash: INFO: task hung in io_uring_del_tctx_node, types: [HANG] # git bisect bad f727f0534512baab56c70a90b92c7695c0d44ca7 Bisecting: 52 revisions left to test after this (roughly 6 steps) [e275f6b8366a9feeb2d9f5850752e9ba12c22dce] Merge branch 'for-6.19/block' into for-next testing commit e275f6b8366a9feeb2d9f5850752e9ba12c22dce gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 1054c5d60813bc574187c1ff36c2e1ecde4f778f2a4053364c8c5953cfbb99d3 all runs: crashed: INFO: task hung in io_uring_del_tctx_node representative crash: INFO: task hung in io_uring_del_tctx_node, types: [HANG] # git bisect bad e275f6b8366a9feeb2d9f5850752e9ba12c22dce Bisecting: 24 revisions left to test after this (roughly 5 steps) [8ac31ef993dcd64b69e84924f17a2dd854e663c2] Merge branch 'io_uring-6.18' into for-next testing commit 8ac31ef993dcd64b69e84924f17a2dd854e663c2 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: f49d2564e7e2241c353c515b4b5f8e7499b2d4391455eb4188647b4c85780dae all runs: OK false negative chance: 0.000 # git bisect good 8ac31ef993dcd64b69e84924f17a2dd854e663c2 Bisecting: 12 revisions left to test after this (roughly 4 steps) [67bfa74d81bae9271f6ec72d2058d081732949cb] blktrace: move trace_note to blk_io_trace2 testing commit 67bfa74d81bae9271f6ec72d2058d081732949cb gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: d8b4c0bbe56fdfc7dbccb0c4e9cfae9f9891f9abb6d16cedc35567cff9c57ff6 all runs: OK false negative chance: 0.000 # git bisect good 67bfa74d81bae9271f6ec72d2058d081732949cb Bisecting: 5 revisions left to test after this (roughly 3 steps) [8f7463c3f0cda867cd0e970b742dfdad2d37efe7] Merge branch 'for-6.19/io_uring' into for-next testing commit 8f7463c3f0cda867cd0e970b742dfdad2d37efe7 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 5a214251457fbae3da0fa0a8a33e0802c91a9de3c5180d94e84babec4d91dfb2 all runs: crashed: INFO: task hung in io_uring_del_tctx_node representative crash: INFO: task hung in io_uring_del_tctx_node, types: [HANG] # git bisect bad 8f7463c3f0cda867cd0e970b742dfdad2d37efe7 Bisecting: 3 revisions left to test after this (roughly 2 steps) [f16b19411d2088e24c378e6ad05685acd46559f0] Merge branch 'for-6.19/io_uring' into for-next testing commit f16b19411d2088e24c378e6ad05685acd46559f0 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 22e9af01113df22376118e2f72965edd6b88f65b461aa95370db447bc409c9e1 all runs: crashed: INFO: task hung in io_uring_del_tctx_node representative crash: INFO: task hung in io_uring_del_tctx_node, types: [HANG] # git bisect bad f16b19411d2088e24c378e6ad05685acd46559f0 Bisecting: 1 revision left to test after this (roughly 1 step) [1cba30bf9fdd6c982708f3587f609a30c370d889] io_uring: add support for IORING_SETUP_SQE_MIXED testing commit 1cba30bf9fdd6c982708f3587f609a30c370d889 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 0fbeae1306b57171d234d262bf2db487090f69e87cc744369b0daa483e47e4bf all runs: crashed: INFO: task hung in io_uring_del_tctx_node representative crash: INFO: task hung in io_uring_del_tctx_node, types: [HANG] # git bisect bad 1cba30bf9fdd6c982708f3587f609a30c370d889 1cba30bf9fdd6c982708f3587f609a30c370d889 is the first bad commit commit 1cba30bf9fdd6c982708f3587f609a30c370d889 Author: Keith Busch Date: Thu Oct 16 11:09:38 2025 -0700 io_uring: add support for IORING_SETUP_SQE_MIXED Normal rings support 64b SQEs for posting submissions, while certain features require the ring to be configured with IORING_SETUP_SQE128, as they need to convey more information per submission. This, in turn, makes ALL the SQEs be 128b in size. This is somewhat wasteful and inefficient, particularly when only certain SQEs need to be of the bigger variant. This adds support for setting up a ring with mixed SQE sizes, using IORING_SETUP_SQE_MIXED. When setup in this mode, SQEs posted to the ring may be either 64b or 128b in size. If a SQE is 128b in size, then opcode will be set to a variante to indicate that this is the case. Any other non-128b opcode will assume the SQ's default size. SQEs on these types of mixed rings may also utilize NOP with skip success set. This can happen if the ring is one (small) SQE entry away from wrapping, and an attempt is made to get a 128b SQE. As SQEs must be contiguous in the SQ ring, a 128b SQE cannot wrap the ring. For this case, a single NOP SQE should be inserted with the SKIP_SUCCESS flag set. The kernel will process this as a normal NOP and without posting a CQE. Signed-off-by: Keith Busch [axboe: {} style fix and assign sqe before opcode read] Signed-off-by: Jens Axboe include/uapi/linux/io_uring.h | 8 ++++++++ io_uring/fdinfo.c | 34 +++++++++++++++++++++++++++------- io_uring/io_uring.c | 37 +++++++++++++++++++++++++++++++++---- io_uring/io_uring.h | 14 ++------------ io_uring/opdef.c | 26 ++++++++++++++++++++++++++ io_uring/opdef.h | 2 ++ io_uring/register.c | 2 +- io_uring/uring_cmd.c | 17 +++++++++++++++-- 8 files changed, 114 insertions(+), 26 deletions(-) accumulated error probability: 0.00 parent commit 5b6d8a032e807c48a843fb81d9e3d74391f731ea wasn't tested testing commit 5b6d8a032e807c48a843fb81d9e3d74391f731ea gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 5a5b17f8bf50e12f02e8b07f403d3da3382bf5f2c276a967c3b6126897af2563 culprit signature: 0fbeae1306b57171d234d262bf2db487090f69e87cc744369b0daa483e47e4bf parent signature: 5a5b17f8bf50e12f02e8b07f403d3da3382bf5f2c276a967c3b6126897af2563 reproducer is flaky (1.00 repro chance estimate) revisions tested: 21, total time: 9h45m27.866314733s (build: 6h0m45.656594345s, test: 3h8m25.033642823s) first bad commit: 1cba30bf9fdd6c982708f3587f609a30c370d889 io_uring: add support for IORING_SETUP_SQE_MIXED recipients (to): ["axboe@kernel.dk" "axboe@kernel.dk" "io-uring@vger.kernel.org" "kbusch@kernel.org"] recipients (cc): ["linux-kernel@vger.kernel.org"] crash: INFO: task hung in io_uring_del_tctx_node INFO: task syz.3.17:3726 blocked for more than 143 seconds. Not tainted syzkaller #0 Blocked by coredump. "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.3.17 state:D stack:13432 pid:3726 tgid:3725 ppid:3319 task_flags:0x400548 flags:0x00080001 Call Trace: context_switch kernel/sched/core.c:5325 [inline] __schedule+0x6ca/0x1620 kernel/sched/core.c:6929 __schedule_loop kernel/sched/core.c:7011 [inline] schedule+0xac/0x140 kernel/sched/core.c:7026 schedule_preempt_disabled+0x32/0x60 kernel/sched/core.c:7083 __mutex_lock_common kernel/locking/mutex.c:676 [inline] __mutex_lock+0x4b5/0xcc0 kernel/locking/mutex.c:760 io_uring_del_tctx_node+0x49/0xb0 io_uring/tctx.c:179 io_uring_clean_tctx+0x59/0xc0 io_uring/tctx.c:195 io_uring_cancel_generic+0x28b/0x2d0 io_uring/io_uring.c:3362 io_uring_files_cancel include/linux/io_uring.h:19 [inline] do_exit+0xa4/0x9a0 kernel/exit.c:912 do_group_exit+0x88/0xa0 kernel/exit.c:1107 get_signal+0x69d/0x740 kernel/signal.c:3034 arch_do_signal_or_restart+0x8a/0x260 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop+0x6d/0xe0 kernel/entry/common.c:40 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline] do_syscall_64+0x181/0x250 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd60898efc9 RSP: 002b:00007fd6097d1038 EFLAGS: 00000246 ORIG_RAX: 000000000000010e RAX: fffffffffffffdfe RBX: 00007fd608be5fa0 RCX: 00007fd60898efc9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007fd608a11f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fd608be6038 R14: 00007fd608be5fa0 R15: 00007ffe8be1a918 Showing all locks held in the system: 1 lock held by khungtaskd/31: #0: ffffffff8397dc30 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline] #0: ffffffff8397dc30 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:867 [inline] #0: ffffffff8397dc30 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x2e/0x100 kernel/locking/lockdep.c:6775 2 locks held by getty/1884: #0: ffff8881047800a0 (&tty->ldisc_sem){....}-{0:0}, at: tty_ldisc_ref_wait+0x20/0x40 drivers/tty/tty_ldisc.c:243 #1: ffffc90003e8b2f0 (&ldata->atomic_read_lock){....}-{3:3}, at: n_tty_read+0x1c3/0x6e0 drivers/tty/n_tty.c:2222 1 lock held by syz.3.17/3726: #0: ffff8881072ce0a8 (&ctx->uring_lock){....}-{3:3}, at: io_uring_del_tctx_node+0x49/0xb0 io_uring/tctx.c:179 3 locks held by syz.3.17/3727: 1 lock held by syz.4.18/4137: #0: ffff888103bb40a8 (&ctx->uring_lock){....}-{3:3}, at: io_uring_del_tctx_node+0x49/0xb0 io_uring/tctx.c:179 3 locks held by syz.4.18/4138: 1 lock held by syz.5.19/4549: #0: ffff888103bb10a8 (&ctx->uring_lock){....}-{3:3}, at: io_uring_del_tctx_node+0x49/0xb0 io_uring/tctx.c:179 3 locks held by syz.5.19/4550: 1 lock held by syz.6.20/4961: #0: ffff8881072da0a8 (&ctx->uring_lock){....}-{3:3}, at: io_uring_del_tctx_node+0x49/0xb0 io_uring/tctx.c:179 3 locks held by syz.6.20/4962: 1 lock held by syz.7.21/5373: #0: ffff8881416e00a8 (&ctx->uring_lock){....}-{3:3}, at: io_uring_del_tctx_node+0x49/0xb0 io_uring/tctx.c:179 3 locks held by syz.7.21/5374: 1 lock held by syz.8.22/5785: #0: ffff8881133a10a8 (&ctx->uring_lock){....}-{3:3}, at: io_uring_del_tctx_node+0x49/0xb0 io_uring/tctx.c:179 3 locks held by syz.8.22/5786: 1 lock held by syz.9.23/6197: #0: ffff8881476de0a8 (&ctx->uring_lock){....}-{3:3}, at: io_uring_del_tctx_node+0x49/0xb0 io_uring/tctx.c:179 3 locks held by syz.9.23/6198: 1 lock held by syz.0.24/6609: #0: ffff8881072df0a8 (&ctx->uring_lock){....}-{3:3}, at: io_uring_del_tctx_node+0x49/0xb0 io_uring/tctx.c:179 3 locks held by syz.0.24/6610: 1 lock held by modprobe/6656: #0: ffff88813bb2b498 (&rq->__lock){....}-{2:2}, at: raw_spin_rq_lock_nested+0x24/0x100 kernel/sched/core.c:638 ============================================= NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 Call Trace: dump_stack_lvl+0xa2/0xf0 lib/dump_stack.c:120 nmi_cpu_backtrace+0x109/0x170 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x8e/0x140 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:332 [inline] watchdog+0x573/0x5a0 kernel/hung_task.c:495 kthread+0x203/0x230 kernel/kthread.c:463 ret_from_fork+0xd2/0x1a0 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 3727 Comm: syz.3.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:__io_uring_show_fdinfo io_uring/fdinfo.c:104 [inline] RIP: 0010:io_uring_show_fdinfo+0x1b2/0x790 io_uring/fdinfo.c:254 Code: 0a 89 44 24 18 41 8b 17 0f ba e2 10 0f 82 95 01 00 00 49 8b 87 d0 00 00 00 89 e9 21 f1 44 8b 2c 88 41 39 f5 0f 87 74 01 00 00 <49> 8b 9f d8 00 00 00 44 89 e8 8b 4c 24 18 d3 e0 48 c1 e0 06 0f b6 RSP: 0018:ffffc900031dfc08 EFLAGS: 00000293 RAX: ffff888110180040 RBX: ffff88810f2ba040 RCX: 0000000000000082 RDX: 0000000000000008 RSI: 00000000000001ff RDI: 0000000000001000 RBP: 00000000c0d46c82 R08: 00000000fffffffc R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000082 R14: ffff8881043b42b8 R15: ffff8881072ce000 FS: 00007fd6087ff6c0(0000) GS:ffff8881b7306000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5400269e9c CR3: 0000000103752000 CR4: 00000000003506f0 Call Trace: seq_show+0x18e/0x1d0 fs/proc/fd.c:68 seq_read_iter+0x195/0x480 fs/seq_file.c:230 seq_read+0x132/0x160 fs/seq_file.c:162 vfs_read+0xe2/0x360 fs/read_write.c:570 ksys_read+0x74/0xf0 fs/read_write.c:715 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x8f/0x250 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd60898efc9 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:00007fd6087ff038 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00007fd608be6090 RCX: 00007fd60898efc9 RDX: 0000000000002020 RSI: 00002000000040c0 RDI: 0000000000000004 RBP: 00007fd608a11f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fd608be6128 R14: 00007fd608be6090 R15: 00007ffe8be1a918