ci2 starts bisection 2026-06-30 07:51:16.259376321 +0000 UTC m=+23139.024087736 bisecting fixing commit since 91d48252ad4b17577cf8cc8d3e1353402e4da8f1 building syzkaller on 4440e7c2e964875f9e35dba6deda12c2195f19d3 ensuring issue is reproducible on original commit 91d48252ad4b17577cf8cc8d3e1353402e4da8f1 testing commit 91d48252ad4b17577cf8cc8d3e1353402e4da8f1 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 7f071695b6a9617ed90ba16f0ae7183fdf62f8ed0289da7731cb62338ce9e8b5 all runs: crashed: general protection fault in nilfs_mdt_save_to_shadow_map representative crash: general protection fault in nilfs_mdt_save_to_shadow_map, types: [DoS] check whether we can drop unnecessary instrumentation disabling configs for [kasan locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed testing commit 91d48252ad4b17577cf8cc8d3e1353402e4da8f1 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 7f01196c7adec627a0445e92397ca07fea1e7be5203b180698c545aaf76fd0a2 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in nilfs_mdt_save_to_shadow_map representative crash: BUG: unable to handle kernel NULL pointer dereference in nilfs_mdt_save_to_shadow_map, types: [NULL-POINTER-DEREFERENCE] the bug reproduces without the instrumentation disabling configs for [atomic_sleep hang memleak ubsan bug_or_warning kasan locking], they are not needed kconfig minimization: base=3707 full=7425 leaves diff=2099 split chunks (needed=false): <2099> split chunk #0 of len 2099 into 5 parts testing without sub-chunk 1/5 disabling configs for [hang memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed testing commit 91d48252ad4b17577cf8cc8d3e1353402e4da8f1 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 3a62986e86bf56b4ad9c47d97ed61082ae502c624c4d0ba2330cafb60c68e2af all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in nilfs_mdt_save_to_shadow_map representative crash: BUG: unable to handle kernel NULL pointer dereference in nilfs_mdt_save_to_shadow_map, types: [NULL-POINTER-DEREFERENCE] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [locking atomic_sleep hang memleak ubsan bug_or_warning kasan], they are not needed testing commit 91d48252ad4b17577cf8cc8d3e1353402e4da8f1 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 3620249753cf5d0f76d574f34976fc7fddc2e369f9d11d56e61846e5567c4b11 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in nilfs_mdt_save_to_shadow_map representative crash: BUG: unable to handle kernel NULL pointer dereference in nilfs_mdt_save_to_shadow_map, types: [NULL-POINTER-DEREFERENCE] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [kasan locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed testing commit 91d48252ad4b17577cf8cc8d3e1353402e4da8f1 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: f18e8102884c93441ee91900b03cc08fa7c4a684c48238b4246600cd7934bdd1 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in nilfs_mdt_save_to_shadow_map representative crash: BUG: unable to handle kernel NULL pointer dereference in nilfs_mdt_save_to_shadow_map, types: [NULL-POINTER-DEREFERENCE] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [locking atomic_sleep hang memleak ubsan bug_or_warning kasan], they are not needed testing commit 91d48252ad4b17577cf8cc8d3e1353402e4da8f1 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 22f6af3df328639bc9ae1b4ee7f065e48fa63e0fd720020bf19ac26c516a616a all runs: OK false negative chance: 0.000 testing without sub-chunk 5/5 disabling configs for [atomic_sleep hang memleak ubsan bug_or_warning kasan locking], they are not needed testing commit 91d48252ad4b17577cf8cc8d3e1353402e4da8f1 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 90a6f5c07291b213f70b47ae447be48ab30b9bae5d499bdd1bc1e75842080329 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in nilfs_mdt_save_to_shadow_map representative crash: BUG: unable to handle kernel NULL pointer dereference in nilfs_mdt_save_to_shadow_map, types: [NULL-POINTER-DEREFERENCE] the chunk can be dropped minimized to 420 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_ADVANCED NETFILTER_CONNCOUNT NET_IPGRE NET_IPGRE_DEMUX NFS_V4_1 NF_CONNTRACK_SNMP NF_NAT_REDIRECT NF_NAT_SNMP_BASIC NF_NAT_TFTP NF_SOCKET_IPV4 NF_SOCKET_IPV6 NF_TABLES NF_TABLES_ARP NF_TPROXY_IPV4 NF_TPROXY_IPV6 NILFS2_FS 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 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 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_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 [bug_or_warning kasan locking atomic_sleep hang memleak ubsan], they are not needed testing current HEAD eceeec79dbc646d6dace49ed1ba2f656683d5537 testing commit eceeec79dbc646d6dace49ed1ba2f656683d5537 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 1f5d075464cdd301e1c3567e3f191ff1ea352e65fea9aa01f45dfd0437e23241 all runs: OK false negative chance: 0.000 # git bisect start eceeec79dbc646d6dace49ed1ba2f656683d5537 91d48252ad4b17577cf8cc8d3e1353402e4da8f1 Bisecting: 874 revisions left to test after this (roughly 10 steps) [2f966ae32f8c213204aa3a72bac3a897dec98b32] USB: serial: option: add Telit Cinterion LE910Cx compositions determine whether the revision contains the guilty commit revision 91d48252ad4b17577cf8cc8d3e1353402e4da8f1 crashed and is reachable testing commit 2f966ae32f8c213204aa3a72bac3a897dec98b32 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 77c83d9c06b5223b02d85dd5918da25521cbf0dc46a06672dbfad857480cda6b all runs: OK false negative chance: 0.000 # git bisect bad 2f966ae32f8c213204aa3a72bac3a897dec98b32 Bisecting: 437 revisions left to test after this (roughly 9 steps) [01f525cca220a2f0ae6c4465b88dac523c4f5384] MIPS: Fix the GCC version check for `__multi3' workaround determine whether the revision contains the guilty commit revision 91d48252ad4b17577cf8cc8d3e1353402e4da8f1 crashed and is reachable testing commit 01f525cca220a2f0ae6c4465b88dac523c4f5384 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 78ac6b17f35729056b0d9e72d03b3dcdea9d3278821656ed4e74e5ea3d40a1cd all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in nilfs_mdt_save_to_shadow_map representative crash: BUG: unable to handle kernel NULL pointer dereference in nilfs_mdt_save_to_shadow_map, types: [NULL-POINTER-DEREFERENCE] # git bisect good 01f525cca220a2f0ae6c4465b88dac523c4f5384 Bisecting: 218 revisions left to test after this (roughly 8 steps) [235b2115de892eab2e107a42efa7a4347baaa80b] rxrpc: proc: size address buffers for %pISpc output determine whether the revision contains the guilty commit revision 91d48252ad4b17577cf8cc8d3e1353402e4da8f1 crashed and is reachable testing commit 235b2115de892eab2e107a42efa7a4347baaa80b gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: bf677f029381147024d7f9945bff0bddec617e19676d2b0c7878540cf408bfaf all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in nilfs_mdt_save_to_shadow_map representative crash: BUG: unable to handle kernel NULL pointer dereference in nilfs_mdt_save_to_shadow_map, types: [NULL-POINTER-DEREFERENCE] # git bisect good 235b2115de892eab2e107a42efa7a4347baaa80b Bisecting: 109 revisions left to test after this (roughly 7 steps) [bac8643486f854dd53af9b23aea7dbbd9b7c1865] misc: ibmasm: fix OOB MMIO read in ibmasm_handle_mouse_interrupt() determine whether the revision contains the guilty commit revision 91d48252ad4b17577cf8cc8d3e1353402e4da8f1 crashed and is reachable testing commit bac8643486f854dd53af9b23aea7dbbd9b7c1865 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 439550d34eef3561b5068a9808f76e8a92195ccc058bf6557111bd6df5eb725e all runs: OK false negative chance: 0.000 # git bisect bad bac8643486f854dd53af9b23aea7dbbd9b7c1865 Bisecting: 54 revisions left to test after this (roughly 6 steps) [901e581bfc44d181f7d9c3f11880dac3e89deb2e] btrfs: send: check for inline extents in range_is_hole_in_parent() determine whether the revision contains the guilty commit revision 01f525cca220a2f0ae6c4465b88dac523c4f5384 crashed and is reachable testing commit 901e581bfc44d181f7d9c3f11880dac3e89deb2e gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 4912dc1380808ee07417839544fb72350a54d8d75153aad1db0ed4a10f7c1fe6 all runs: OK false negative chance: 0.000 # git bisect bad 901e581bfc44d181f7d9c3f11880dac3e89deb2e Bisecting: 26 revisions left to test after this (roughly 5 steps) [92242c7bef6c0f2fba9f72b532bd3e0da108b2b3] ocfs2: add inline inode consistency check to ocfs2_validate_inode_block() determine whether the revision contains the guilty commit revision 235b2115de892eab2e107a42efa7a4347baaa80b crashed and is reachable testing commit 92242c7bef6c0f2fba9f72b532bd3e0da108b2b3 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 5ac8e18a67d5586d3b03289dc23d818ef8bbbc91df051f208944e19b921a4d1c all runs: OK false negative chance: 0.000 # git bisect bad 92242c7bef6c0f2fba9f72b532bd3e0da108b2b3 Bisecting: 13 revisions left to test after this (roughly 4 steps) [305a0674bc552bfcc3231e23fb91cf4f62aec168] PCI: endpoint: pci-epf-vntb: Remove duplicate resource teardown determine whether the revision contains the guilty commit revision 01f525cca220a2f0ae6c4465b88dac523c4f5384 crashed and is reachable testing commit 305a0674bc552bfcc3231e23fb91cf4f62aec168 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: f8c6dcf8524d1d8e54c1bf41366d6a37fb3dd176981edb20319ad943006e1f88 all runs: OK false negative chance: 0.000 # git bisect bad 305a0674bc552bfcc3231e23fb91cf4f62aec168 Bisecting: 6 revisions left to test after this (roughly 3 steps) [e247a0e01d15ed420f77ec5e2335721bf430a5b3] ALSA: 6fire: fix use-after-free on disconnect determine whether the revision contains the guilty commit revision 91d48252ad4b17577cf8cc8d3e1353402e4da8f1 crashed and is reachable testing commit e247a0e01d15ed420f77ec5e2335721bf430a5b3 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 118f03bf656c32585c61308dd84436818ecc9db0aa64c4db3ffff1e8b7eb9d1e all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in nilfs_mdt_save_to_shadow_map representative crash: BUG: unable to handle kernel NULL pointer dereference in nilfs_mdt_save_to_shadow_map, types: [NULL-POINTER-DEREFERENCE] # git bisect good e247a0e01d15ed420f77ec5e2335721bf430a5b3 Bisecting: 3 revisions left to test after this (roughly 2 steps) [837c7a59fb58f81b0db33848357f6a5d0d1250ad] nilfs2: fix NULL i_assoc_inode dereference in nilfs_mdt_save_to_shadow_map determine whether the revision contains the guilty commit revision 91d48252ad4b17577cf8cc8d3e1353402e4da8f1 crashed and is reachable testing commit 837c7a59fb58f81b0db33848357f6a5d0d1250ad gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: f8c6dcf8524d1d8e54c1bf41366d6a37fb3dd176981edb20319ad943006e1f88 all runs: OK false negative chance: 0.000 # git bisect bad 837c7a59fb58f81b0db33848357f6a5d0d1250ad Bisecting: 0 revisions left to test after this (roughly 1 step) [25d500cf391e384356a612b85cf60b353ad3cd0c] media: as102: fix to not free memory after the device is registered in as102_usb_probe() determine whether the revision contains the guilty commit revision e247a0e01d15ed420f77ec5e2335721bf430a5b3 crashed and is reachable testing commit 25d500cf391e384356a612b85cf60b353ad3cd0c gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 118f03bf656c32585c61308dd84436818ecc9db0aa64c4db3ffff1e8b7eb9d1e all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in nilfs_mdt_save_to_shadow_map representative crash: BUG: unable to handle kernel NULL pointer dereference in nilfs_mdt_save_to_shadow_map, types: [NULL-POINTER-DEREFERENCE] # git bisect good 25d500cf391e384356a612b85cf60b353ad3cd0c 837c7a59fb58f81b0db33848357f6a5d0d1250ad is the first bad commit commit 837c7a59fb58f81b0db33848357f6a5d0d1250ad Author: Deepanshu Kartikey Date: Tue Mar 31 09:47:21 2026 +0900 nilfs2: fix NULL i_assoc_inode dereference in nilfs_mdt_save_to_shadow_map commit 4a4e0328edd9e9755843787d28f16dd4165f8b48 upstream. The DAT inode's btree node cache (i_assoc_inode) is initialized lazily during btree operations. However, nilfs_mdt_save_to_shadow_map() assumes i_assoc_inode is already initialized when copying dirty pages to the shadow map during GC. If NILFS_IOCTL_CLEAN_SEGMENTS is called immediately after mount before any btree operation has occurred on the DAT inode, i_assoc_inode is NULL leading to a general protection fault. Fix this by calling nilfs_attach_btree_node_cache() on the DAT inode in nilfs_dat_read() at mount time, ensuring i_assoc_inode is always initialized before any GC operation can use it. Reported-by: syzbot+4b4093b1f24ad789bf37@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=4b4093b1f24ad789bf37 Tested-by: syzbot+4b4093b1f24ad789bf37@syzkaller.appspotmail.com Fixes: e897be17a441 ("nilfs2: fix lockdep warnings in page operations for btree nodes") Signed-off-by: Deepanshu Kartikey Signed-off-by: Ryusuke Konishi Cc: stable@vger.kernel.org Signed-off-by: Viacheslav Dubeyko Signed-off-by: Greg Kroah-Hartman fs/nilfs2/dat.c | 3 +++ 1 file changed, 3 insertions(+) accumulated error probability: 0.00 culprit signature: f8c6dcf8524d1d8e54c1bf41366d6a37fb3dd176981edb20319ad943006e1f88 parent signature: 118f03bf656c32585c61308dd84436818ecc9db0aa64c4db3ffff1e8b7eb9d1e revisions tested: 18, total time: 5h45m41.458625461s (build: 2h19m30.742808587s, test: 2h49m25.385809381s) first good commit: 837c7a59fb58f81b0db33848357f6a5d0d1250ad nilfs2: fix NULL i_assoc_inode dereference in nilfs_mdt_save_to_shadow_map recipients (to): ["gregkh@linuxfoundation.org" "kartikey406@gmail.com" "konishi.ryusuke@gmail.com" "slava@dubeyko.com" "syzbot+4b4093b1f24ad789bf37@syzkaller.appspotmail.com"] recipients (cc): []