ci2 starts bisection 2023-12-19 20:12:02.556061636 +0000 UTC m=+47237.595361411 bisecting cause commit starting from 2cf4f94d8e8646803f8fb0facf134b0cd7fb691a building syzkaller on 3ad490ea48468e50fe91f6f6b2ca4cbc74d924bf ensuring issue is reproducible on original commit 2cf4f94d8e8646803f8fb0facf134b0cd7fb691a testing commit 2cf4f94d8e8646803f8fb0facf134b0cd7fb691a gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a7453d89f442f134e05ca28f52f8d77e9f5b9f3d503eb5dbd8f8823c2c902b11 run #0: failed: failed to run binary in VM: broken console: Permission denied (publickey) run #1: crashed: possible deadlock in lookup_slow run #2: crashed: possible deadlock in seq_read_iter run #3: crashed: possible deadlock in seq_read_iter run #4: crashed: possible deadlock in seq_read_iter run #5: crashed: possible deadlock in seq_read_iter run #6: crashed: possible deadlock in lookup_slow run #7: crashed: possible deadlock in seq_read_iter run #8: crashed: possible deadlock in lookup_slow run #9: crashed: possible deadlock in lookup_slow run #10: crashed: possible deadlock in seq_read_iter run #11: crashed: possible deadlock in lookup_slow run #12: crashed: possible deadlock in seq_read_iter run #13: crashed: possible deadlock in lookup_slow run #14: crashed: possible deadlock in lookup_slow run #15: crashed: possible deadlock in lookup_slow run #16: crashed: possible deadlock in seq_read_iter run #17: crashed: possible deadlock in lookup_slow run #18: crashed: possible deadlock in lookup_slow run #19: crashed: possible deadlock in lookup_slow representative crash: possible deadlock in lookup_slow, types: [LOCKDEP] check whether we can drop unnecessary instrumentation disabling configs for [LEAK UBSAN BUG KASAN ATOMIC_SLEEP HANG], they are not needed testing commit 2cf4f94d8e8646803f8fb0facf134b0cd7fb691a gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 4bceb74106ce2c71bee6252da12bce37fa42e1df003f70f50f84428d10850def run #0: crashed: possible deadlock in seq_read_iter run #1: crashed: possible deadlock in seq_read_iter run #2: crashed: possible deadlock in seq_read_iter run #3: crashed: possible deadlock in seq_read_iter run #4: crashed: possible deadlock in lookup_slow run #5: crashed: possible deadlock in seq_read_iter run #6: crashed: possible deadlock in seq_read_iter run #7: crashed: possible deadlock in seq_read_iter run #8: crashed: possible deadlock in seq_read_iter run #9: crashed: possible deadlock in seq_read_iter representative crash: possible deadlock in seq_read_iter, types: [LOCKDEP] the bug reproduces without the instrumentation disabling configs for [KASAN ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed kconfig minimization: base=3915 full=7651 leaves diff=2007 split chunks (needed=false): <2007> split chunk #0 of len 2007 into 5 parts testing without sub-chunk 1/5 disabling configs for [UBSAN BUG KASAN ATOMIC_SLEEP HANG LEAK], they are not needed testing commit 2cf4f94d8e8646803f8fb0facf134b0cd7fb691a gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 14fa1c0d9242ea64289b87e9d70ba162ff80308698264515427e3583c1d06d06 run #0: crashed: possible deadlock in lookup_slow run #1: crashed: possible deadlock in seq_read_iter run #2: crashed: possible deadlock in seq_read_iter run #3: crashed: possible deadlock in seq_read_iter run #4: crashed: possible deadlock in lookup_slow run #5: crashed: possible deadlock in seq_read_iter run #6: crashed: possible deadlock in seq_read_iter run #7: crashed: possible deadlock in seq_read_iter run #8: crashed: possible deadlock in seq_read_iter run #9: crashed: possible deadlock in seq_read_iter representative crash: possible deadlock in lookup_slow, types: [LOCKDEP] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN], they are not needed testing commit 2cf4f94d8e8646803f8fb0facf134b0cd7fb691a gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 6e9e24033efc8f2a3b2b3429aa9e0fd97129957f363490b20a3c802119599bac run #0: crashed: possible deadlock in seq_read_iter run #1: crashed: possible deadlock in seq_read_iter run #2: crashed: possible deadlock in seq_read_iter run #3: crashed: possible deadlock in seq_read_iter run #4: crashed: possible deadlock in lookup_slow run #5: crashed: possible deadlock in seq_read_iter run #6: crashed: possible deadlock in seq_read_iter run #7: crashed: possible deadlock in seq_read_iter run #8: crashed: possible deadlock in seq_read_iter run #9: crashed: possible deadlock in seq_read_iter representative crash: possible deadlock in seq_read_iter, types: [LOCKDEP] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [HANG LEAK UBSAN BUG KASAN ATOMIC_SLEEP], they are not needed testing commit 2cf4f94d8e8646803f8fb0facf134b0cd7fb691a gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c127a1d8411015f2af752cea74f2a3f96092e3b450f197814843b8cc2c4e9fb6 all runs: crashed: possible deadlock in seq_read_iter representative crash: possible deadlock in seq_read_iter, types: [LOCKDEP] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [UBSAN BUG KASAN ATOMIC_SLEEP HANG LEAK], they are not needed testing commit 2cf4f94d8e8646803f8fb0facf134b0cd7fb691a gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 005288cdfffd0d71a7d04aba5e07dae2dccb5f55425f778fe09c83c79818475d all runs: OK false negative chance: 0.000 testing without sub-chunk 5/5 disabling configs for [KASAN ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed testing commit 2cf4f94d8e8646803f8fb0facf134b0cd7fb691a gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 95befea61787b53f9b0da924836b273393a32ce2782c1d762b8c1b29c60b40ca run #0: crashed: possible deadlock in seq_read_iter run #1: crashed: possible deadlock in seq_read_iter run #2: crashed: possible deadlock in seq_read_iter run #3: crashed: possible deadlock in seq_read_iter run #4: crashed: possible deadlock in seq_read_iter run #5: crashed: possible deadlock in seq_read_iter run #6: crashed: possible deadlock in seq_read_iter run #7: crashed: possible deadlock in lookup_slow run #8: crashed: possible deadlock in seq_read_iter run #9: crashed: possible deadlock in seq_read_iter representative crash: possible deadlock in seq_read_iter, types: [LOCKDEP] the chunk can be dropped minimized to 402 configs; suspects: [AF_RXRPC ARCH_ENABLE_MEMORY_HOTREMOVE ATM AX25 CFG80211 CMA DAX DLM DVB_CORE ENCRYPTED_KEYS EXTCON GENEVE GPIOLIB HAMRADIO HAVE_CLK HID_SENSOR_HUB HID_SMARTJOYPLUS HID_THRUSTMASTER IIO INFINIBAND INFINIBAND_ADDR_TRANS INFINIBAND_IPOIB INFINIBAND_USER_ACCESS INFINIBAND_VIRT_DMA INPUT_TABLET INPUT_TOUCHSCREEN IP_SCTP L2TP LIBNVDIMM MEDIA_COMMON_OPTIONS MEDIA_DIGITAL_TV_SUPPORT MEDIA_RADIO_SUPPORT MEDIA_SDR_SUPPORT MEDIA_SUPPORT MEDIA_USB_SUPPORT MEMORY_HOTPLUG MEMORY_HOTREMOVE MFD_DLN2 MFD_RETU MMC MTD MTD_UBI NETFILTER_CONNCOUNT NET_IPGRE NET_IPGRE_DEMUX NFS_V4_1 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 NLS_UCS2_UTILS 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_DEBUG OVERLAY_FS_INDEX OVERLAY_FS_REDIRECT_ALWAYS_FOLLOW OVERLAY_FS_REDIRECT_DIR PACKET_DIAG PADATA PAGE_IDLE_FLAG PAGE_POOL 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 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 PM_CLK PNFS_BLOCK PNFS_FILE_LAYOUT PNFS_FLEXFILE_LAYOUT PPP PPPOATM PPPOE PPPOE_HASH_BITS_4 PPPOL2TP PPP_ASYNC PPP_BSDCOMP PPP_DEFLATE PPP_FILTER PPP_MPPE PPP_MULTILINK PPP_SYNC_TTY PPTP PREEMPT PREEMPT_NOTIFIERS PRISM2_USB PROC_CHILDREN PSI PSTORE PSTORE_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 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_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 SECURITY_SMACK_NETFILTER 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 SMC SMC_DIAG SMSC_PHY 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_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_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_COMPILE_DECOMP_SINGLE 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 SYSFB 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_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 TMPFS_QUOTA 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_FUSB302 TYPEC_TCPCI TYPEC_TCPM TYPEC_TPS6598X TYPEC_UCSI 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 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_CHAOSKEY USB_CHIPIDEA USB_CHIPIDEA_HOST USB_CHIPIDEA_PCI 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 VXLAN WIRELESS WLAN ZONE_DEVICE] disabling configs for [HANG LEAK UBSAN BUG KASAN ATOMIC_SLEEP], they are not needed picked [v6.6 v6.5 v6.4 v6.2 v6.0 v5.18 v5.16 v5.14 v5.11 v5.8 v5.5 v5.2 v4.20 v4.19] out of 29 release tags testing release v6.6 testing commit ffc253263a1375a65fa6c9f62a893e9767fbebfa gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 88853d22a02280af2ce691e177ea9fb3c355aa3259e9a22788525dc7cf65a8cb run #0: crashed: possible deadlock in seq_read_iter run #1: crashed: possible deadlock in lookup_slow run #2: crashed: possible deadlock in seq_read_iter run #3: crashed: possible deadlock in seq_read_iter run #4: crashed: possible deadlock in seq_read_iter run #5: crashed: possible deadlock in seq_read_iter run #6: crashed: possible deadlock in lookup_slow run #7: crashed: possible deadlock in seq_read_iter run #8: crashed: possible deadlock in seq_read_iter run #9: crashed: possible deadlock in seq_read_iter representative crash: possible deadlock in seq_read_iter, types: [LOCKDEP] testing release v6.5 testing commit 2dde18cd1d8fac735875f2e4987f11817cc0bc2c gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a5d909d737879be930e7bd9e3e35786151bbbae00b0516f04393c431ff118d32 run #0: crashed: possible deadlock in seq_read_iter run #1: crashed: possible deadlock in lookup_slow run #2: crashed: possible deadlock in seq_read_iter run #3: crashed: possible deadlock in lookup_slow run #4: crashed: possible deadlock in seq_read_iter run #5: crashed: possible deadlock in seq_read_iter run #6: crashed: possible deadlock in seq_read_iter run #7: crashed: possible deadlock in seq_read_iter run #8: crashed: possible deadlock in seq_read_iter run #9: crashed: possible deadlock in seq_read_iter representative crash: possible deadlock in seq_read_iter, types: [LOCKDEP] testing release v6.4 testing commit 6995e2de6891c724bfeb2db33d7b87775f913ad1 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b2b91555dfeb29a916dee40e80186e65b7c02e4f80eb1466bc9964c81fe2552c all runs: OK false negative chance: 0.000 # git bisect start 2dde18cd1d8fac735875f2e4987f11817cc0bc2c 6995e2de6891c724bfeb2db33d7b87775f913ad1 Bisecting: 7364 revisions left to test after this (roughly 13 steps) [b775d6c5859affe00527cbe74263de05cfe6b9f9] Merge tag 'mips_6.5' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux testing commit b775d6c5859affe00527cbe74263de05cfe6b9f9 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: e2156fc804d1919fc6a752aa3cd85ae5fa54fb43b157197f4d590e5d417862ca run #0: crashed: possible deadlock in seq_read_iter run #1: crashed: possible deadlock in seq_read_iter run #2: crashed: possible deadlock in seq_read_iter run #3: crashed: possible deadlock in seq_read_iter run #4: crashed: possible deadlock in seq_read_iter run #5: crashed: possible deadlock in seq_read_iter run #6: crashed: possible deadlock in seq_read_iter run #7: crashed: possible deadlock in seq_read_iter run #8: crashed: possible deadlock in seq_read_iter run #9: crashed: possible deadlock in lookup_slow representative crash: possible deadlock in seq_read_iter, types: [LOCKDEP] # git bisect bad b775d6c5859affe00527cbe74263de05cfe6b9f9 Bisecting: 3061 revisions left to test after this (roughly 12 steps) [3a8a670eeeaa40d87bd38a587438952741980c18] Merge tag 'net-next-6.5' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next testing commit 3a8a670eeeaa40d87bd38a587438952741980c18 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c51c05f4a0bf7f08c3881fcd8d2eea48aeb44ba55e5681fcdeb6ed983f615451 run #0: crashed: possible deadlock in seq_read_iter run #1: crashed: possible deadlock in lookup_slow run #2: crashed: possible deadlock in seq_read_iter run #3: crashed: possible deadlock in seq_read_iter run #4: crashed: possible deadlock in seq_read_iter run #5: crashed: possible deadlock in seq_read_iter run #6: crashed: possible deadlock in lookup_slow run #7: crashed: possible deadlock in seq_read_iter run #8: crashed: possible deadlock in seq_read_iter run #9: crashed: possible deadlock in seq_read_iter representative crash: possible deadlock in seq_read_iter, types: [LOCKDEP] # git bisect bad 3a8a670eeeaa40d87bd38a587438952741980c18 Bisecting: 2103 revisions left to test after this (roughly 11 steps) [6e17c6de3ddf3073741d9c91a796ee696914d8a0] Merge tag 'mm-stable-2023-06-24-19-15' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm testing commit 6e17c6de3ddf3073741d9c91a796ee696914d8a0 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: acd6ee31a72ed4ae6385ee1753f4fd2d19d280d0e75cb7a31c04aae0bf861765 run #0: crashed: possible deadlock in seq_read_iter run #1: crashed: possible deadlock in seq_read_iter run #2: crashed: possible deadlock in seq_read_iter run #3: crashed: possible deadlock in seq_read_iter run #4: crashed: possible deadlock in seq_read_iter run #5: crashed: possible deadlock in lookup_slow run #6: crashed: possible deadlock in seq_read_iter run #7: crashed: possible deadlock in seq_read_iter run #8: crashed: possible deadlock in seq_read_iter run #9: crashed: possible deadlock in seq_read_iter representative crash: possible deadlock in seq_read_iter, types: [LOCKDEP] # git bisect bad 6e17c6de3ddf3073741d9c91a796ee696914d8a0 Bisecting: 1048 revisions left to test after this (roughly 10 steps) [2605e80d3438c77190f55b821c6575048c68268e] Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux testing commit 2605e80d3438c77190f55b821c6575048c68268e gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: bc70d480720e4a92b9d0db75c8c97c0a8a94c733c6c49fc3651031285cb207e0 run #0: crashed: possible deadlock in lookup_slow run #1: crashed: possible deadlock in seq_read_iter run #2: crashed: possible deadlock in seq_read_iter run #3: crashed: possible deadlock in seq_read_iter run #4: crashed: possible deadlock in seq_read_iter run #5: crashed: possible deadlock in seq_read_iter run #6: crashed: possible deadlock in seq_read_iter run #7: crashed: possible deadlock in seq_read_iter run #8: crashed: possible deadlock in seq_read_iter run #9: crashed: possible deadlock in seq_read_iter representative crash: possible deadlock in lookup_slow, types: [LOCKDEP] # git bisect bad 2605e80d3438c77190f55b821c6575048c68268e Bisecting: 665 revisions left to test after this (roughly 9 steps) [0aa69d53ac7c30f6184f88f2e310d808b32b35a5] Merge tag 'for-6.5/io_uring-2023-06-23' of git://git.kernel.dk/linux testing commit 0aa69d53ac7c30f6184f88f2e310d808b32b35a5 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7b5ec381801715680c83c1167d647c67c77e06b40fbb28969576a602db7ffcdd all runs: OK false negative chance: 0.000 # git bisect good 0aa69d53ac7c30f6184f88f2e310d808b32b35a5 Bisecting: 341 revisions left to test after this (roughly 8 steps) [7cffdbe3607a6cc2dc02d135e13732ec36bc4e28] Merge tag 'x86-boot-2023-06-26' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/tip/tip testing commit 7cffdbe3607a6cc2dc02d135e13732ec36bc4e28 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a16fd53150184e5eeeac4dec0659ca80a1f2d524d7bb55169d09b0410f94bb9e run #0: crashed: possible deadlock in seq_read_iter run #1: crashed: possible deadlock in seq_read_iter run #2: crashed: possible deadlock in lookup_slow run #3: crashed: possible deadlock in seq_read_iter run #4: crashed: possible deadlock in seq_read_iter run #5: crashed: possible deadlock in seq_read_iter run #6: crashed: possible deadlock in seq_read_iter run #7: crashed: possible deadlock in seq_read_iter run #8: crashed: possible deadlock in seq_read_iter run #9: crashed: possible deadlock in seq_read_iter representative crash: possible deadlock in seq_read_iter, types: [LOCKDEP] # git bisect bad 7cffdbe3607a6cc2dc02d135e13732ec36bc4e28 Bisecting: 161 revisions left to test after this (roughly 7 steps) [658afed19ceed54a52b9e9e69c0791c8868ff55d] mtd: block: use a simple bool to track open for write testing commit 658afed19ceed54a52b9e9e69c0791c8868ff55d gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 26b91ec818b6c6932804bf9908152de1c723eac2385670c5452e395374bbbf88 all runs: crashed: possible deadlock in seq_read_iter representative crash: possible deadlock in seq_read_iter, types: [LOCKDEP] # git bisect bad 658afed19ceed54a52b9e9e69c0791c8868ff55d Bisecting: 80 revisions left to test after this (roughly 6 steps) [a4f75764d16bed317276b05a9fe2c179ef61680d] block: avoid repeated work in blk_mark_disk_dead testing commit a4f75764d16bed317276b05a9fe2c179ef61680d gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 403e257381a4e46d9560106d4651faaadde6684e55263b85a89c8cd8947051a5 all runs: OK false negative chance: 0.000 # git bisect good a4f75764d16bed317276b05a9fe2c179ef61680d Bisecting: 40 revisions left to test after this (roughly 5 steps) [3d2af77e31ade05ff7ccc3658c3635ec1bea0979] blk-cgroup: Reinit blkg_iostat_set after clearing in blkcg_reset_stats() testing commit 3d2af77e31ade05ff7ccc3658c3635ec1bea0979 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 849130174345f6b1c7223725babca99c6f268d62ad558cecc50c3c0a592d3a52 all runs: crashed: possible deadlock in seq_read_iter representative crash: possible deadlock in seq_read_iter, types: [LOCKDEP] # git bisect bad 3d2af77e31ade05ff7ccc3658c3635ec1bea0979 Bisecting: 19 revisions left to test after this (roughly 4 steps) [73231b58b1b496d631fa0ecf9fa7f64f5a07c6e3] init: don't remove the /dev/ prefix from error messages testing commit 73231b58b1b496d631fa0ecf9fa7f64f5a07c6e3 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 33fd57289e14089718adc61ea6bff264ec20ebfaf1c69c5be73497cf57a78a67 all runs: OK false negative chance: 0.000 # git bisect good 73231b58b1b496d631fa0ecf9fa7f64f5a07c6e3 Bisecting: 9 revisions left to test after this (roughly 3 steps) [d4a28d7defe79006e59293a4b43d518ba8483fb0] dm: remove dm_get_dev_t testing commit d4a28d7defe79006e59293a4b43d518ba8483fb0 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: f61b0c8b9ff36d961b0dca7196c1aef878f98b9aa09561a734ffab6206c9be77 all runs: OK false negative chance: 0.000 # git bisect good d4a28d7defe79006e59293a4b43d518ba8483fb0 Bisecting: 4 revisions left to test after this (roughly 2 steps) [2577f53f42947d8ca01666e3444bb7307319ea38] block: mark early_lookup_bdev as __init testing commit 2577f53f42947d8ca01666e3444bb7307319ea38 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 13bfd6a4343587be7e35319776dfcf42debe45cfc861e645304c760328ee3fed all runs: crashed: possible deadlock in seq_read_iter representative crash: possible deadlock in seq_read_iter, types: [LOCKDEP] # git bisect bad 2577f53f42947d8ca01666e3444bb7307319ea38 Bisecting: 2 revisions left to test after this (roughly 1 step) [1e8c813b083c4122dfeaa5c3b11028331026e85d] PM: hibernate: don't use early_lookup_bdev in resume_store testing commit 1e8c813b083c4122dfeaa5c3b11028331026e85d gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 1c4bd5ef085ed9b46a4d26e87a54f4317d0dc15b8d55b489f37ea48266313c51 run #0: crashed: possible deadlock in seq_read_iter run #1: crashed: possible deadlock in seq_read_iter run #2: crashed: possible deadlock in seq_read_iter run #3: crashed: possible deadlock in seq_read_iter run #4: crashed: possible deadlock in lookup_slow run #5: crashed: possible deadlock in seq_read_iter run #6: crashed: possible deadlock in seq_read_iter run #7: crashed: possible deadlock in seq_read_iter run #8: crashed: possible deadlock in seq_read_iter run #9: crashed: possible deadlock in seq_read_iter representative crash: possible deadlock in seq_read_iter, types: [LOCKDEP] # git bisect bad 1e8c813b083c4122dfeaa5c3b11028331026e85d Bisecting: 0 revisions left to test after this (roughly 0 steps) [7a126d5bf975f082281fb9b45d110cd49b7c3ee4] dm: only call early_lookup_bdev from early boot context testing commit 7a126d5bf975f082281fb9b45d110cd49b7c3ee4 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 430ca7989e1a70ee1370dbb2f85a47417abc9c0b65536900136851c6ad88b604 all runs: OK false negative chance: 0.000 # git bisect good 7a126d5bf975f082281fb9b45d110cd49b7c3ee4 1e8c813b083c4122dfeaa5c3b11028331026e85d is the first bad commit commit 1e8c813b083c4122dfeaa5c3b11028331026e85d Author: Christoph Hellwig Date: Wed May 31 14:55:32 2023 +0200 PM: hibernate: don't use early_lookup_bdev in resume_store resume_store is a sysfs attribute written during normal kernel runtime, and it should not use the early_lookup_bdev API that bypasses all normal path based permission checking, and might cause problems with certain container environments renaming devices. Switch to lookup_bdev, which does a normal path lookup instead, and fall back to trying to parse a numeric dev_t just like early_lookup_bdev did. Note that this strictly speaking changes the kernel ABI as the PARTUUID= and PARTLABEL= style syntax is now not available during a running systems. They never were intended for that, but this breaks things we'll have to figure out a way to make them available again. But if avoidable in any way I'd rather avoid that. Fixes: 421a5fa1a6cf ("PM / hibernate: use name_to_dev_t to parse resume") Signed-off-by: Christoph Hellwig Acked-by: Rafael J. Wysocki Link: https://lore.kernel.org/r/20230531125535.676098-22-hch@lst.de Signed-off-by: Jens Axboe kernel/power/hibernate.c | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-) accumulated error probability: 0.00 culprit signature: 1c4bd5ef085ed9b46a4d26e87a54f4317d0dc15b8d55b489f37ea48266313c51 parent signature: 430ca7989e1a70ee1370dbb2f85a47417abc9c0b65536900136851c6ad88b604 revisions tested: 24, total time: 4h17m18.709544864s (build: 1h38m26.612684119s, test: 2h9m25.59964485s) first bad commit: 1e8c813b083c4122dfeaa5c3b11028331026e85d PM: hibernate: don't use early_lookup_bdev in resume_store recipients (to): ["axboe@kernel.dk" "hch@lst.de" "rafael@kernel.org"] recipients (cc): [] crash: possible deadlock in seq_read_iter ====================================================== WARNING: possible circular locking dependency detected 6.4.0-rc2-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.1/4756 is trying to acquire lock: ffff888103f88358 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0x3c/0x3e0 fs/seq_file.c:182 but task is already holding lock: ffff8881013e7448 (sb_writers#4){.+.+}-{0:0}, at: do_sendfile+0x25d/0x410 fs/read_write.c:1253 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (sb_writers#4){.+.+}-{0:0}: percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1494 [inline] sb_start_write+0x34/0xd0 include/linux/fs.h:1569 mnt_want_write+0x12/0x30 fs/namespace.c:394 ovl_create_object+0x3e/0x100 fs/overlayfs/dir.c:630 lookup_open fs/namei.c:3492 [inline] open_last_lookups fs/namei.c:3560 [inline] path_openat+0x4f4/0xce0 fs/namei.c:3788 do_filp_open+0xac/0x150 fs/namei.c:3818 do_sys_openat2+0x89/0x160 fs/open.c:1356 do_sys_open fs/open.c:1372 [inline] __do_sys_open fs/open.c:1380 [inline] __se_sys_open fs/open.c:1376 [inline] __x64_sys_open+0x7a/0xa0 fs/open.c:1376 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x42/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #2 (&ovl_i_mutex_dir_key[depth]){++++}-{3:3}: down_read+0x4a/0x440 kernel/locking/rwsem.c:1520 inode_lock_shared include/linux/fs.h:785 [inline] lookup_slow+0x20/0x50 fs/namei.c:1706 walk_component+0xd3/0xf0 fs/namei.c:1998 lookup_last fs/namei.c:2455 [inline] path_lookupat+0x45/0x100 fs/namei.c:2479 filename_lookup+0xd9/0x1f0 fs/namei.c:2508 kern_path+0x2a/0x80 fs/namei.c:2606 lookup_bdev+0x4a/0xb0 block/bdev.c:938 resume_store+0xae/0x230 kernel/power/hibernate.c:1181 kernfs_fop_write_iter+0x129/0x1a0 fs/kernfs/file.c:334 do_iter_write+0x1dc/0x2d0 fs/read_write.c:860 iter_file_splice_write+0x270/0x430 fs/splice.c:763 do_splice_from fs/splice.c:841 [inline] direct_splice_actor+0x2b/0x90 fs/splice.c:1028 splice_direct_to_actor+0xcc/0x210 fs/splice.c:983 do_splice_direct+0x86/0xd0 fs/splice.c:1071 do_sendfile+0x278/0x410 fs/read_write.c:1254 __do_sys_sendfile64 fs/read_write.c:1322 [inline] __se_sys_sendfile64+0xa7/0xe0 fs/read_write.c:1308 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x42/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #1 (&of->mutex){+.+.}-{3:3}: __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x99/0x990 kernel/locking/mutex.c:747 kernfs_seq_start+0x21/0xf0 fs/kernfs/file.c:154 seq_read_iter+0x116/0x3e0 fs/seq_file.c:225 call_read_iter include/linux/fs.h:1862 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x241/0x2a0 fs/read_write.c:470 ksys_read+0x70/0xe0 fs/read_write.c:613 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x42/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #0 (&p->lock){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3108 [inline] check_prevs_add kernel/locking/lockdep.c:3227 [inline] validate_chain kernel/locking/lockdep.c:3842 [inline] __lock_acquire+0x125c/0x2590 kernel/locking/lockdep.c:5074 lock_acquire+0xea/0x260 kernel/locking/lockdep.c:5691 __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x99/0x990 kernel/locking/mutex.c:747 seq_read_iter+0x3c/0x3e0 fs/seq_file.c:182 call_read_iter include/linux/fs.h:1862 [inline] copy_splice_read+0x1c4/0x320 fs/splice.c:366 splice_direct_to_actor+0x96/0x210 fs/splice.c:962 do_splice_direct+0x86/0xd0 fs/splice.c:1071 do_sendfile+0x278/0x410 fs/read_write.c:1254 __do_sys_sendfile64 fs/read_write.c:1322 [inline] __se_sys_sendfile64+0xa7/0xe0 fs/read_write.c:1308 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x42/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd other info that might help us debug this: Chain exists of: &p->lock --> &ovl_i_mutex_dir_key[depth] --> sb_writers#4 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(sb_writers#4); lock(&ovl_i_mutex_dir_key[depth]); lock(sb_writers#4); lock(&p->lock); *** DEADLOCK *** 1 lock held by syz-executor.1/4756: #0: ffff8881013e7448 (sb_writers#4){.+.+}-{0:0}, at: do_sendfile+0x25d/0x410 fs/read_write.c:1253 stack backtrace: CPU: 0 PID: 4756 Comm: syz-executor.1 Not tainted 6.4.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x8d/0xe0 lib/dump_stack.c:106 check_noncircular+0x108/0x110 kernel/locking/lockdep.c:2188 check_prev_add kernel/locking/lockdep.c:3108 [inline] check_prevs_add kernel/locking/lockdep.c:3227 [inline] validate_chain kernel/locking/lockdep.c:3842 [inline] __lock_acquire+0x125c/0x2590 kernel/locking/lockdep.c:5074 lock_acquire+0xea/0x260 kernel/locking/lockdep.c:5691 __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x99/0x990 kernel/locking/mutex.c:747 seq_read_iter+0x3c/0x3e0 fs/seq_file.c:182 call_read_iter include/linux/fs.h:1862 [inline] copy_splice_read+0x1c4/0x320 fs/splice.c:366 splice_direct_to_actor+0x96/0x210 fs/splice.c:962 do_splice_direct+0x86/0xd0 fs/splice.c:1071 do_sendfile+0x278/0x410 fs/read_write.c:1254 __do_sys_sendfile64 fs/read_write.c:1322 [inline] __se_sys_sendfile64+0xa7/0xe0 fs/read_write.c:1308 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x42/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7ff713c7cbe9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ff7149410c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007ff713d9c050 RCX: 00007ff713c7cbe9 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000003 RBP: 00007ff713cc847a R08: 0000000000000000 R09: 0000000000000000 R10: 0001000000201007 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007ff713d9c050 R15: 00007ffdb45f3348