ci2 starts bisection 2025-10-02 15:20:33.806242486 +0000 UTC m=+12115.447298484 bisecting fixing commit since 3b8db0e4f2631c030ab86f78d199ec0b198578f3 building syzkaller on 77908e5f2ae80bee6d434bca762a25a0a5fc6a83 ensuring issue is reproducible on original commit 3b8db0e4f2631c030ab86f78d199ec0b198578f3 testing commit 3b8db0e4f2631c030ab86f78d199ec0b198578f3 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 06bd05d29e0bb7e86e0eb2e1d23eccd3f2a6a2e0ea6cd400e3ecc8a88d840808 run #0: crashed: BUG: unable to handle kernel paging request in put_prev_task_balance run #1: crashed: KASAN: slab-out-of-bounds Write in __schedule run #2: crashed: BUG: unable to handle kernel paging request in put_prev_task_balance run #3: crashed: BUG: unable to handle kernel paging request in put_prev_task_balance run #4: crashed: KASAN: stack-out-of-bounds Write in end_buffer_read_sync run #5: crashed: BUG: unable to handle kernel paging request in put_prev_task_balance run #6: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #7: crashed: BUG: unable to handle kernel paging request in put_prev_task_balance run #8: crashed: KASAN: use-after-free Write in __schedule run #9: crashed: kernel panic: stack is corrupted in __schedule run #10: crashed: KASAN: slab-out-of-bounds Write in __schedule run #11: crashed: possible deadlock in console_unlock run #12: crashed: possible deadlock in console_unlock run #13: crashed: BUG: unable to handle kernel paging request in put_prev_task_balance run #14: crashed: BUG: unable to handle kernel paging request in psi_group_change run #15: crashed: BUG: unable to handle kernel paging request in put_prev_task_balance run #16: crashed: possible deadlock in console_unlock run #17: crashed: KASAN: slab-out-of-bounds Write in __schedule run #18: crashed: BUG: unable to handle kernel paging request in put_prev_task_balance run #19: crashed: kernel panic: stack is corrupted in __schedule representative crash: BUG: unable to handle kernel paging request in put_prev_task_balance, types: [MEMORY_SAFETY_BUG KASAN-WRITE] check whether we can drop unnecessary instrumentation disabling configs for [ubsan locking atomic_sleep hang memleak], they are not needed testing commit 3b8db0e4f2631c030ab86f78d199ec0b198578f3 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c057f1f4ea52b88c66426fe717996749df8d800d675a558c33c729b3cd2dff76 run #0: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #1: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #2: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #3: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #4: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #5: crashed: invalid opcode in preempt_schedule_irq run #6: crashed: invalid opcode in preempt_schedule_irq run #7: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #8: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #9: OK representative crash: KASAN: out-of-bounds Write in end_buffer_read_sync, types: [KASAN-WRITE] the bug reproduces without the instrumentation disabling configs for [locking atomic_sleep hang memleak ubsan], they are not needed kconfig minimization: base=3707 full=7306 leaves diff=2039 split chunks (needed=false): <2039> split chunk #0 of len 2039 into 5 parts testing without sub-chunk 1/5 disabling configs for [hang memleak ubsan locking atomic_sleep], they are not needed testing commit 3b8db0e4f2631c030ab86f78d199ec0b198578f3 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 35437ba03af87953543d9d4c6e9d68ab503f61ca0942666bedfe920394a316fd run #0: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #1: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #2: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #3: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #4: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #5: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #6: crashed: invalid opcode in preempt_schedule_irq run #7: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #8: crashed: invalid opcode in preempt_schedule_irq run #9: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync representative crash: KASAN: out-of-bounds Write in end_buffer_read_sync, types: [KASAN-WRITE] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [locking atomic_sleep hang memleak ubsan], they are not needed testing commit 3b8db0e4f2631c030ab86f78d199ec0b198578f3 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 02b171c20b2ea780b0df79514cdbe2732719c841664484b77fb9a4d9cfc2b742 run #0: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #1: crashed: invalid opcode in preempt_schedule_irq run #2: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #3: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #4: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #5: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #6: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #7: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #8: crashed: invalid opcode in preempt_schedule_irq run #9: OK representative crash: KASAN: out-of-bounds Write in end_buffer_read_sync, types: [KASAN-WRITE] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [ubsan locking atomic_sleep hang memleak], they are not needed testing commit 3b8db0e4f2631c030ab86f78d199ec0b198578f3 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: d5d779ee111753e508e88694375b143d2dfe600d91b386a644e9a75a265cc5e7 run #0: crashed: KASAN: slab-out-of-bounds Read in preempt_schedule_irq run #1: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #2: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #3: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #4: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #5: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #6: crashed: KASAN: slab-out-of-bounds Read in preempt_schedule_irq run #7: crashed: BUG: unable to handle kernel paging request in __writeback_single_inode run #8: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #9: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync representative crash: KASAN: out-of-bounds Write in end_buffer_read_sync, types: [KASAN-WRITE KASAN-READ] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [ubsan locking atomic_sleep hang memleak], they are not needed testing commit 3b8db0e4f2631c030ab86f78d199ec0b198578f3 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 2e588dae1f921e85bbf901d7b2fd8a5fc4a928c9eddd7f38ff5c2278be7bd1bf all runs: OK false negative chance: 0.000 testing without sub-chunk 5/5 disabling configs for [ubsan locking atomic_sleep hang memleak], they are not needed testing commit 3b8db0e4f2631c030ab86f78d199ec0b198578f3 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: d5158226f9928232a2c805c05f7b419c5e8d8ad54e091f145ae474ac5af57ddc run #0: crashed: BUG: unable to handle kernel paging request in corrupted run #1: crashed: KASAN: slab-out-of-bounds Read in preempt_schedule_irq run #2: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #3: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #4: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #5: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #6: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #7: crashed: BUG: Bad page state in shmem_getpage_gfp run #8: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #9: OK representative crash: KASAN: out-of-bounds Write in end_buffer_read_sync, types: [KASAN-WRITE MEMORY_SAFETY_BUG] the chunk can be dropped minimized to 408 configs; suspects: [AF_RXRPC ARCH_ENABLE_MEMORY_HOTREMOVE ASYMMETRIC_TPM_KEY_SUBTYPE ATM AX25 BXT_WC_PMIC_OPREGION CFG80211 CMA DAX DLM DVB_CORE ENCRYPTED_KEYS EXTCON GENEVE GPIOLIB HAMRADIO HID_PLAYSTATION HID_SENSOR_HUB HID_SMARTJOYPLUS 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 LIBCRC32C LIBNVDIMM 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_RETU MMC MTD MTD_UBI NETFILTER_CONNCOUNT NET_IPGRE NET_IPGRE_DEMUX NFS_V4_1 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 NOP_USB_XCEIV NOZOMI NTFS3_FS NTFS3_FS_POSIX_ACL NTFS3_LZX_XPRESS NTFS_FS NTFS_RW NULL_TTY NUMA_BALANCING NUMA_BALANCING_DEFAULT_ENABLED NUMA_EMU NUMA_KEEP_MEMINFO NVDIMM_DAX NVDIMM_KEYS NVDIMM_PFN 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 ORANGEFS_FS OSF_PARTITION OVERLAY_FS OVERLAY_FS_INDEX OVERLAY_FS_REDIRECT_ALWAYS_FOLLOW OVERLAY_FS_REDIRECT_DIR PACKET_DIAG PADATA PAGE_IDLE_FLAG PAGE_REPORTING 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 PHONET 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 PMIC_OPREGION PNFS_BLOCK PNFS_FILE_LAYOUT PNFS_FLEXFILE_LAYOUT PPP PPPOATM PPPOE PPPOL2TP PPP_ASYNC PPP_BSDCOMP PPP_DEFLATE PPP_FILTER PPP_MPPE PPP_MULTILINK PPP_SYNC_TTY PPTP PREEMPT PREEMPT_DYNAMIC PREEMPT_NOTIFIERS PREEMPT_RCU PRISM2_USB PROC_CHILDREN PROC_MEM_ALWAYS_FORCE PSI PSTORE PSTORE_842_COMPRESS PSTORE_COMPRESS PSTORE_DEFLATE_COMPRESS PSTORE_DEFLATE_COMPRESS_DEFAULT PSTORE_LZ4HC_COMPRESS PSTORE_LZ4_COMPRESS PSTORE_LZO_COMPRESS PSTORE_ZSTD_COMPRESS QCOM_QMI_HELPERS QNX4FS_FS QNX6FS_FS QRTR QRTR_TUN R8712U 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 REGULATOR REGULATOR_FIXED_VOLTAGE REGULATOR_TWL4030 REISERFS_FS REISERFS_FS_POSIX_ACL REISERFS_FS_SECURITY REISERFS_FS_XATTR REISERFS_PROC_INFO RESET_CONTROLLER RFKILL RFKILL_INPUT RFKILL_LEDS RMI4_2D_SENSOR RMI4_CORE RMI4_F03 RMI4_F03_SERIO RMI4_F11 RMI4_F12 RMI4_F30 ROMFS_BACKED_BY_BOTH ROMFS_FS ROMFS_ON_BLOCK ROMFS_ON_MTD ROSE RTC_DRV_HID_SENSOR_TIME RXKAD SCHED_CORE 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_COOKIE_HMAC_MD5 SCTP_COOKIE_HMAC_SHA1 SCTP_DEFAULT_COOKIE_HMAC_MD5 SECONDARY_TRUSTED_KEYRING SECURITY_INFINIBAND SECURITY_NETWORK_XFRM SENSORS_AQUACOMPUTER_D5NEXT SENSORS_CORSAIR_CPRO SENSORS_CORSAIR_PSU SENSORS_NZXT_KRAKEN2 SERIAL_DEV_BUS SERIAL_DEV_CTRL_TTYPORT SERIAL_MCTRL_GPIO SGI_PARTITION SIGNATURE SIGNED_PE_FILE_VERIFICATION SLHC SLIP SLIP_COMPRESSED SLIP_MODE_SLIP6 SLIP_SMART SMARTJOYPLUS_FF SMBFS_COMMON 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_LED SND_CTL_VALIDATION SND_DEBUG SND_DMA_SGBUF SND_DRIVERS SND_DUMMY SND_DYNAMIC_MINORS 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_SUPPORT_OLD_API SND_TIMER SND_USB SND_USB_6FIRE SND_USB_AUDIO 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_CGROUP_DATA SOCK_VALIDATE_XMIT SOLARIS_X86_PARTITION SONY_FF SOUND SOUND_OSS_CORE SOUND_OSS_CORE_PRECLAIM SPI SPI_DLN2 SPI_DYNAMIC SPI_MASTER SQUASHFS SQUASHFS_4K_DEVBLK_SIZE SQUASHFS_DECOMP_SINGLE 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 STAGING STP STREAM_PARSER SUNRPC_BACKCHANNEL SUN_PARTITION SW_SYNC SYSV68_PARTITION SYSV_FS TABLET_USB_ACECAD TABLET_USB_AIPTEK TABLET_USB_HANWANG TABLET_USB_KBTAB TABLET_USB_PEGASUS TAHVO_USB TAHVO_USB_HOST_BY_DEFAULT TASKS_RCU TASKS_RCU_GENERIC TASKS_TRACE_RCU 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 TEXTSEARCH TEXTSEARCH_BM TEXTSEARCH_FSM TEXTSEARCH_KMP THERMAL_NETLINK THP_SWAP THRUSTMASTER_FF TIPC TIPC_CRYPTO TIPC_DIAG TIPC_MEDIA_IB TIPC_MEDIA_UDP TLS TLS_TOE 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 TPM_KEY_PARSER TRANSPARENT_HUGEPAGE TRANSPARENT_HUGEPAGE_MADVISE TRUSTED_KEYS TTPCI_EEPROM TTY_PRINTK TUN_VNET_CROSS_LE TWL4030_CORE TYPEC TYPEC_DP_ALTMODE TYPEC_FUSB302 TYPEC_HD3SS3220 TYPEC_MT6360 TYPEC_MUX_INTEL_PMC TYPEC_NVIDIA_ALTMODE TYPEC_RT1711H TYPEC_STUSB160X TYPEC_TCPCI TYPEC_TCPCI_MAXIM TYPEC_TCPM TYPEC_TPS6598X TYPEC_UCSI TYPEC_WCOVE 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 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_APPLEDISPLAY USB_ARMLINUX USB_BDC_UDC USB_BELKIN USB_C67X00_HCD USB_CATC USB_CDC_PHONET USB_CDNS3 USB_CDNS3_GADGET USB_CDNS3_HOST USB_CDNS3_PCI_WRAP USB_CDNSP_GADGET USB_CDNSP_HOST USB_CDNSP_PCI USB_CDNS_HOST USB_CDNS_SUPPORT USB_CHAOSKEY USB_CHIPIDEA USB_CHIPIDEA_GENERIC USB_CHIPIDEA_HOST USB_CHIPIDEA_IMX USB_CHIPIDEA_MSM USB_CHIPIDEA_PCI USB_CHIPIDEA_TEGRA USB_CHIPIDEA_UDC USB_CONFIGFS USB_CONFIGFS_ACM USB_CONFIGFS_ECM USB_CONFIGFS_ECM_SUBSET USB_CONFIGFS_EEM USB_CONFIGFS_F_FS USB_CONFIGFS_F_HID USB_DWC2 USB_GADGET USB_MUSB_HDRC USB_NET_CDC_SUBSET USB_ROLE_SWITCH USB_STORAGE_REALTEK USB_ULPI_BUS USB_USBNET VIDEO_DEV VIDEO_V4L2 VXLAN WIRELESS WLAN ZONE_DEVICE] disabling configs for [ubsan locking atomic_sleep hang memleak], they are not needed testing current HEAD 29e53a5b1c4f144301ee36a907e8b03d7733f0b0 testing commit 29e53a5b1c4f144301ee36a907e8b03d7733f0b0 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 820533eeec7776ea047c7955c51d9e90f9fb23b33a99c99364e6b405481a1550 all runs: OK false negative chance: 0.000 # git bisect start 29e53a5b1c4f144301ee36a907e8b03d7733f0b0 3b8db0e4f2631c030ab86f78d199ec0b198578f3 Bisecting: 934 revisions left to test after this (roughly 10 steps) [3435a2048972c84e0253174e152c139bf306a492] usb: dwc3: Abort suspend on soft disconnect failure determine whether the revision contains the guilty commit revision 3b8db0e4f2631c030ab86f78d199ec0b198578f3 crashed and is reachable testing commit 3435a2048972c84e0253174e152c139bf306a492 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 2e9b8aa2a314c2f78e6d9a6a86885452f8693b65da071348e7a4df92cfb29cec run #0: crashed: BUG: unable to handle kernel paging request in inode_wait_for_writeback run #1: crashed: BUG: unable to handle kernel paging request in __writeback_single_inode run #2: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #3: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #4: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #5: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #6: crashed: KASAN: stack-out-of-bounds Write in end_buffer_read_sync run #7: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #8: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #9: OK representative crash: KASAN: out-of-bounds Write in end_buffer_read_sync, types: [KASAN-WRITE] # git bisect good 3435a2048972c84e0253174e152c139bf306a492 Bisecting: 467 revisions left to test after this (roughly 9 steps) [30b14a9374d9aff4fb8d83603df22ac037e95e5c] ASoC: fsl_sai: replace regmap_write with regmap_update_bits determine whether the revision contains the guilty commit revision 3b8db0e4f2631c030ab86f78d199ec0b198578f3 crashed and is reachable testing commit 30b14a9374d9aff4fb8d83603df22ac037e95e5c gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b8a1e8aca9a6804b713afe9fb2db9bcdbcb3dc68559ae69938a08fa6c6526fd8 run #0: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #1: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #2: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #3: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #4: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #5: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #6: crashed: KASAN: slab-out-of-bounds Read in preempt_schedule_irq run #7: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #8: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #9: OK representative crash: KASAN: out-of-bounds Write in end_buffer_read_sync, types: [KASAN-WRITE] # git bisect good 30b14a9374d9aff4fb8d83603df22ac037e95e5c Bisecting: 233 revisions left to test after this (roughly 8 steps) [67334c94b85378a1b0e8cfdabb12c980356fced5] Revert "drm/amdgpu: fix incorrect vm flags to map bo" determine whether the revision contains the guilty commit revision 3435a2048972c84e0253174e152c139bf306a492 crashed and is reachable testing commit 67334c94b85378a1b0e8cfdabb12c980356fced5 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c8c3291b045fe43be981fbc00f07422cc73319fc98a024733017cedd5481b6c5 all runs: OK false negative chance: 0.000 # git bisect bad 67334c94b85378a1b0e8cfdabb12c980356fced5 Bisecting: 116 revisions left to test after this (roughly 7 steps) [f4480eaad4891fc4e4c2d2bbc43df781c84d2201] selftests: mptcp: add missing join check determine whether the revision contains the guilty commit revision 3435a2048972c84e0253174e152c139bf306a492 crashed and is reachable testing commit f4480eaad4891fc4e4c2d2bbc43df781c84d2201 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 04e807316ba4f7c46debda4aecf2dfaab298b78773bc9c3ab886790b93b7d004 run #0: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #1: crashed: KASAN: slab-out-of-bounds Read in preempt_schedule_irq run #2: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #3: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #4: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #5: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #6: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #7: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #8: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #9: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync representative crash: KASAN: out-of-bounds Write in end_buffer_read_sync, types: [KASAN-WRITE] # git bisect good f4480eaad4891fc4e4c2d2bbc43df781c84d2201 Bisecting: 58 revisions left to test after this (roughly 6 steps) [c78c8e5048b7069b6655613ab4e9795a901dbbee] usb: xhci: Fix slot_id resource race conflict determine whether the revision contains the guilty commit revision 3b8db0e4f2631c030ab86f78d199ec0b198578f3 crashed and is reachable testing commit c78c8e5048b7069b6655613ab4e9795a901dbbee gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c49c6ca0f7dc42a6db4fb3fa3abb2f3fa735b62a2de03a1eece4ff27f8bfa564 all runs: OK false negative chance: 0.000 # git bisect bad c78c8e5048b7069b6655613ab4e9795a901dbbee Bisecting: 28 revisions left to test after this (roughly 5 steps) [868a1b68dcd9f2805bb86aa64862402f785d8c4a] comedi: Fix use of uninitialized memory in do_insn_ioctl() and do_insnlist_ioctl() determine whether the revision contains the guilty commit revision 3b8db0e4f2631c030ab86f78d199ec0b198578f3 crashed and is reachable testing commit 868a1b68dcd9f2805bb86aa64862402f785d8c4a gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: e5bbbb474afb3bc4cb4fe47794c07b71daed2995e8afe3c29f174095fe5ee90e all runs: OK false negative chance: 0.000 # git bisect bad 868a1b68dcd9f2805bb86aa64862402f785d8c4a Bisecting: 14 revisions left to test after this (roughly 4 steps) [9c92d12b5cb9d9d88c12ae71794d3a7382fcdec0] drm/amd/display: Avoid a NULL pointer dereference determine whether the revision contains the guilty commit revision 30b14a9374d9aff4fb8d83603df22ac037e95e5c crashed and is reachable testing commit 9c92d12b5cb9d9d88c12ae71794d3a7382fcdec0 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b83180347bfbac19a7f4145bcd60c97f8b8719255048d3dcbe0e54fdf883b40e run #0: crashed: KASAN: stack-out-of-bounds Write in end_buffer_read_sync run #1: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #2: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #3: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #4: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #5: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #6: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #7: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #8: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #9: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync representative crash: KASAN: stack-out-of-bounds Write in end_buffer_read_sync, types: [KASAN-WRITE] # git bisect good 9c92d12b5cb9d9d88c12ae71794d3a7382fcdec0 Bisecting: 7 revisions left to test after this (roughly 3 steps) [4038209594755a9213bda951c1dfbaad26b36c03] fpga: zynq_fpga: Fix the wrong usage of dma_map_sgtable() determine whether the revision contains the guilty commit revision f4480eaad4891fc4e4c2d2bbc43df781c84d2201 crashed and is reachable testing commit 4038209594755a9213bda951c1dfbaad26b36c03 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 87bccc6a9b5543df6ded2dbe80603ee1944244eddc19263734d9da3581c8b2c0 all runs: OK false negative chance: 0.000 # git bisect bad 4038209594755a9213bda951c1dfbaad26b36c03 Bisecting: 3 revisions left to test after this (roughly 2 steps) [9031c990fd69208ec97be78a2ed8dc1c6ca0e922] drm/amd/display: Find first CRTC and its line time in dce110_fill_display_configs determine whether the revision contains the guilty commit revision 9c92d12b5cb9d9d88c12ae71794d3a7382fcdec0 crashed and is reachable testing commit 9031c990fd69208ec97be78a2ed8dc1c6ca0e922 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b83180347bfbac19a7f4145bcd60c97f8b8719255048d3dcbe0e54fdf883b40e run #0: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #1: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #2: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #3: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #4: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #5: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #6: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #7: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #8: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #9: OK representative crash: KASAN: out-of-bounds Write in end_buffer_read_sync, types: [KASAN-WRITE] # git bisect good 9031c990fd69208ec97be78a2ed8dc1c6ca0e922 Bisecting: 1 revision left to test after this (roughly 1 step) [03b40bf5d0389ca23ae6857ee25789f0e0b47ce8] fs/buffer: fix use-after-free when call bh_read() helper determine whether the revision contains the guilty commit revision 3b8db0e4f2631c030ab86f78d199ec0b198578f3 crashed and is reachable testing commit 03b40bf5d0389ca23ae6857ee25789f0e0b47ce8 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 4ca05842d917ebd9f34f857b0b21e852e1c0a83e01070f2f88fa8bbd6a1b3f80 all runs: OK false negative chance: 0.000 # git bisect bad 03b40bf5d0389ca23ae6857ee25789f0e0b47ce8 Bisecting: 0 revisions left to test after this (roughly 0 steps) [0496b11f223fb82e0ef9db41187f910452d11d77] drm/amd/display: Fill display clock and vblank time in dce110_fill_display_configs determine whether the revision contains the guilty commit revision 3b8db0e4f2631c030ab86f78d199ec0b198578f3 crashed and is reachable testing commit 0496b11f223fb82e0ef9db41187f910452d11d77 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b83180347bfbac19a7f4145bcd60c97f8b8719255048d3dcbe0e54fdf883b40e run #0: crashed: KASAN: slab-out-of-bounds Read in preempt_schedule_irq run #1: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #2: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #3: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #4: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #5: crashed: KASAN: slab-out-of-bounds Read in preempt_schedule_irq run #6: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #7: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #8: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync run #9: crashed: KASAN: out-of-bounds Write in end_buffer_read_sync representative crash: KASAN: out-of-bounds Write in end_buffer_read_sync, types: [KASAN-WRITE] # git bisect good 0496b11f223fb82e0ef9db41187f910452d11d77 03b40bf5d0389ca23ae6857ee25789f0e0b47ce8 is the first bad commit commit 03b40bf5d0389ca23ae6857ee25789f0e0b47ce8 Author: Ye Bin Date: Mon Aug 11 22:18:30 2025 +0800 fs/buffer: fix use-after-free when call bh_read() helper [ Upstream commit 7375f22495e7cd1c5b3b5af9dcc4f6dffe34ce49 ] There's issue as follows: BUG: KASAN: stack-out-of-bounds in end_buffer_read_sync+0xe3/0x110 Read of size 8 at addr ffffc9000168f7f8 by task swapper/3/0 CPU: 3 UID: 0 PID: 0 Comm: swapper/3 Not tainted 6.16.0-862.14.0.6.x86_64 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996) Call Trace: dump_stack_lvl+0x55/0x70 print_address_description.constprop.0+0x2c/0x390 print_report+0xb4/0x270 kasan_report+0xb8/0xf0 end_buffer_read_sync+0xe3/0x110 end_bio_bh_io_sync+0x56/0x80 blk_update_request+0x30a/0x720 scsi_end_request+0x51/0x2b0 scsi_io_completion+0xe3/0x480 ? scsi_device_unbusy+0x11e/0x160 blk_complete_reqs+0x7b/0x90 handle_softirqs+0xef/0x370 irq_exit_rcu+0xa5/0xd0 sysvec_apic_timer_interrupt+0x6e/0x90 Above issue happens when do ntfs3 filesystem mount, issue may happens as follows: mount IRQ ntfs_fill_super read_cache_page do_read_cache_folio filemap_read_folio mpage_read_folio do_mpage_readpage ntfs_get_block_vbo bh_read submit_bh wait_on_buffer(bh); blk_complete_reqs scsi_io_completion scsi_end_request blk_update_request end_bio_bh_io_sync end_buffer_read_sync __end_buffer_read_notouch unlock_buffer wait_on_buffer(bh);--> return will return to caller put_bh --> trigger stack-out-of-bounds In the mpage_read_folio() function, the stack variable 'map_bh' is passed to ntfs_get_block_vbo(). Once unlock_buffer() unlocks and wait_on_buffer() returns to continue processing, the stack variable is likely to be reclaimed. Consequently, during the end_buffer_read_sync() process, calling put_bh() may result in stack overrun. If the bh is not allocated on the stack, it belongs to a folio. Freeing a buffer head which belongs to a folio is done by drop_buffers() which will fail to free buffers which are still locked. So it is safe to call put_bh() before __end_buffer_read_notouch(). Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Ye Bin Link: https://lore.kernel.org/20250811141830.343774-1-yebin@huaweicloud.com Reviewed-by: Matthew Wilcox (Oracle) Signed-off-by: Christian Brauner Signed-off-by: Sasha Levin fs/buffer.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) accumulated error probability: 0.00 culprit signature: 4ca05842d917ebd9f34f857b0b21e852e1c0a83e01070f2f88fa8bbd6a1b3f80 parent signature: b83180347bfbac19a7f4145bcd60c97f8b8719255048d3dcbe0e54fdf883b40e revisions tested: 19, total time: 5h37m54.363525965s (build: 1h35m12.847103945s, test: 3h58m26.972151578s) first good commit: 03b40bf5d0389ca23ae6857ee25789f0e0b47ce8 fs/buffer: fix use-after-free when call bh_read() helper recipients (to): ["brauner@kernel.org" "sashal@kernel.org" "willy@infradead.org" "yebin10@huawei.com"] recipients (cc): []