ci2 starts bisection 2024-01-26 21:17:43.734383215 +0000 UTC m=+95217.608576995 bisecting fixing commit since 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: 6a75e3592644a2b61c6fdf7132ae11e25c711999b3316d833196db1ec6a3870b run #0: crashed: possible deadlock in lookup_slow 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 lookup_slow run #6: crashed: possible deadlock in lookup_slow run #7: crashed: possible deadlock in lookup_slow run #8: crashed: possible deadlock in seq_read_iter run #9: crashed: possible deadlock in lookup_slow run #10: crashed: possible deadlock in lookup_slow run #11: crashed: possible deadlock in seq_read_iter run #12: crashed: possible deadlock in lookup_slow 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 seq_read_iter 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 [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: 59b701f20395c89c13b02df38541debd71862342bab6e59f94e28a8f109829fb all runs: 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 [BUG KASAN ATOMIC_SLEEP HANG LEAK UBSAN], 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 [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: 16eca958ad8c7c057fe4c0e74f8b3ba39119ebc825e6a5c41fd0a34a8f11fba6 run #0: crashed: possible deadlock in lookup_slow 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 lookup_slow 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 [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: 685b5a84505aa1d8fc93d0a955809e2b55c6868ad2d74c74fb74f2bcbaba7b43 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 testing without sub-chunk 3/5 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: 8c0e64248994cbe67a5b9b3e41e5d306919c48e6ad01a30e38305264c2568260 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: boot failed: can't ssh into the instance representative crash: possible deadlock in seq_read_iter, types: [LOCKDEP] the chunk can be dropped testing without sub-chunk 4/5 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: f60373fce54112ca573bb939e7b54b6f5ce50f5a601bd43d3e315152012d4e69 all runs: OK false negative chance: 0.000 testing without sub-chunk 5/5 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: cbf92a64a49a42880c372aa0745003147b89f77a929d920432acaf785ccab203 all runs: 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 [ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN], they are not needed testing current HEAD ecb1b8288dc7ccbdcb3b9df005fa1c0e0c0388a7 testing commit ecb1b8288dc7ccbdcb3b9df005fa1c0e0c0388a7 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 42cf1a5bfc62a18a55b0525a1ea94cd16480ddcffad725d6394f89fdc88a4a31 all runs: OK false negative chance: 0.000 # git bisect start ecb1b8288dc7ccbdcb3b9df005fa1c0e0c0388a7 2cf4f94d8e8646803f8fb0facf134b0cd7fb691a Bisecting: 6954 revisions left to test after this (roughly 13 steps) [ba5afb9a84df2e6b26a1b6389b98849cd16ea757] fs: rework listmount() implementation determine whether the revision contains the guilty commit revision 2cf4f94d8e8646803f8fb0facf134b0cd7fb691a crashed and is reachable testing commit ba5afb9a84df2e6b26a1b6389b98849cd16ea757 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a8b174de8f9319a752a7f1893936e07207bf4663335cb9cdc5db69e92a4c5178 all runs: OK false negative chance: 0.000 # git bisect bad ba5afb9a84df2e6b26a1b6389b98849cd16ea757 Bisecting: 3542 revisions left to test after this (roughly 12 steps) [de927f6c0b07d9e698416c5b287c521b07694cac] Merge tag 's390-6.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux determine whether the revision contains the guilty commit revision 2cf4f94d8e8646803f8fb0facf134b0cd7fb691a crashed and is reachable testing commit de927f6c0b07d9e698416c5b287c521b07694cac gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b2020354c1c88018cb5990f042a0b60697690a5c851d86374a509352550c113c run #0: boot failed: can't ssh into the instance run #1: OK run #2: OK run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK false negative chance: 0.000 # git bisect bad de927f6c0b07d9e698416c5b287c521b07694cac Bisecting: 1602 revisions left to test after this (roughly 11 steps) [9f2a635235823cf016eb8af0aeb3c0b2b25cea64] Merge tag 'mm-nonmm-stable-2024-01-09-10-33' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm determine whether the revision contains the guilty commit revision 2cf4f94d8e8646803f8fb0facf134b0cd7fb691a crashed and is reachable testing commit 9f2a635235823cf016eb8af0aeb3c0b2b25cea64 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: ec37fb1b9392e6784e35ddb77b88455c1d5cd68d2ad5112fbd06f7d788a757d9 all runs: OK false negative chance: 0.000 # git bisect bad 9f2a635235823cf016eb8af0aeb3c0b2b25cea64 Bisecting: 814 revisions left to test after this (roughly 10 steps) [968b80332432172dbbb773e749a43bdc846d1a13] Merge tag 'powerpc-6.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux determine whether the revision contains the guilty commit revision 2cf4f94d8e8646803f8fb0facf134b0cd7fb691a crashed and is reachable testing commit 968b80332432172dbbb773e749a43bdc846d1a13 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 5582a5987e3746bcc1afed1b749de5cfb4376414e4cae3d830efcca5cde59659 all runs: OK false negative chance: 0.000 # git bisect bad 968b80332432172dbbb773e749a43bdc846d1a13 Bisecting: 425 revisions left to test after this (roughly 9 steps) [a476aae3f1dc78a162a0d2e7945feea7d2b29401] x86/csum: clean up `csum_partial' further determine whether the revision contains the guilty commit revision 2cf4f94d8e8646803f8fb0facf134b0cd7fb691a crashed and is reachable testing commit a476aae3f1dc78a162a0d2e7945feea7d2b29401 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b7ee331063fde6bb75ebbfca293fafbb5d4ad8eb16a31750dc170ed4f49d8979 all runs: crashed: possible deadlock in seq_read_iter representative crash: possible deadlock in seq_read_iter, types: [LOCKDEP] # git bisect good a476aae3f1dc78a162a0d2e7945feea7d2b29401 Bisecting: 226 revisions left to test after this (roughly 8 steps) [8c9440fea77440772542d6dbcb5c36182495c164] Merge tag 'vfs-6.8.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs determine whether the revision contains the guilty commit revision 2cf4f94d8e8646803f8fb0facf134b0cd7fb691a crashed and is reachable testing commit 8c9440fea77440772542d6dbcb5c36182495c164 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 3c38f5ef05b2e3b7ba2cd8969970737ecf1c6a9415e6fb3d4467560f720ff1d4 all runs: crashed: possible deadlock in seq_read_iter representative crash: possible deadlock in seq_read_iter, types: [LOCKDEP] # git bisect good 8c9440fea77440772542d6dbcb5c36182495c164 Bisecting: 109 revisions left to test after this (roughly 7 steps) [bef91c28f28fe8a36b91e9a39f60054ae1874280] Merge tag 'x86_cpu_for_v6.8' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip determine whether the revision contains the guilty commit revision a476aae3f1dc78a162a0d2e7945feea7d2b29401 crashed and is reachable testing commit bef91c28f28fe8a36b91e9a39f60054ae1874280 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 96ff44719ceca75a0202c3db26e6d59fc977f46714d1840357a93a6d0c55c158 all runs: OK false negative chance: 0.000 # git bisect bad bef91c28f28fe8a36b91e9a39f60054ae1874280 Bisecting: 75 revisions left to test after this (roughly 6 steps) [5db8752c3b81bd33a549f6f812bab81e3bb61b20] Merge tag 'vfs-6.8.iov_iter' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs determine whether the revision contains the guilty commit revision a476aae3f1dc78a162a0d2e7945feea7d2b29401 crashed and is reachable testing commit 5db8752c3b81bd33a549f6f812bab81e3bb61b20 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 685c8f21456d557784b93c326d052f47953e0226799d748b9401d27b53ce3846 all runs: OK false negative chance: 0.000 # git bisect bad 5db8752c3b81bd33a549f6f812bab81e3bb61b20 Bisecting: 20 revisions left to test after this (roughly 4 steps) [730651268664070dbd582d7d0338b47d066d6323] fs: use do_splice_direct() for nfsd/ksmbd server-side-copy determine whether the revision contains the guilty commit checking the merge base b85ea95d086471afb4ad062012a4d73cd328fa86 no existing result, test the revision testing commit b85ea95d086471afb4ad062012a4d73cd328fa86 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 1f87eaef45c7bef9c76374067ecf16e89a02ee270d5dffeb25cc901f099213bd 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 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] testing commit 730651268664070dbd582d7d0338b47d066d6323 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 22d412d7c469451984a5fabe65d3f22ebe253bb82303e1e2ddf996c059ee99d4 all runs: OK false negative chance: 0.000 # git bisect bad 730651268664070dbd582d7d0338b47d066d6323 Bisecting: 9 revisions left to test after this (roughly 3 steps) [e389b76a7ee1b62392ab52c22f9ba81f23145824] coda: change locking order in coda_file_write_iter() determine whether the revision contains the guilty commit revision b85ea95d086471afb4ad062012a4d73cd328fa86 crashed and is reachable testing commit e389b76a7ee1b62392ab52c22f9ba81f23145824 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: dca93c6b554004133849432048b39eb4dad667f89d86e8ba6d4ba9c36efaaddf all runs: crashed: possible deadlock in seq_read_iter representative crash: possible deadlock in seq_read_iter, types: [LOCKDEP] # git bisect good e389b76a7ee1b62392ab52c22f9ba81f23145824 Bisecting: 4 revisions left to test after this (roughly 2 steps) [8802e580ee643e3f63c6b39ff64e7c7baa4a55ba] fs: create __sb_write_started() helper determine whether the revision contains the guilty commit revision e389b76a7ee1b62392ab52c22f9ba81f23145824 crashed and is reachable testing commit 8802e580ee643e3f63c6b39ff64e7c7baa4a55ba gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 82bb37d101997912f8521078cc81d5214d0fb919fdf6d8dfc8740891cfd01b37 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 seq_read_iter run #7: crashed: possible deadlock in seq_read_iter run #8: crashed: possible deadlock in lookup_slow run #9: crashed: possible deadlock in seq_read_iter representative crash: possible deadlock in seq_read_iter, types: [LOCKDEP] # git bisect good 8802e580ee643e3f63c6b39ff64e7c7baa4a55ba Bisecting: 2 revisions left to test after this (roughly 1 step) [21b32e6a0ab5b174fa1ca2fb4c212577cf405d83] fs: create {sb,file}_write_not_started() helpers determine whether the revision contains the guilty commit revision b85ea95d086471afb4ad062012a4d73cd328fa86 crashed and is reachable testing commit 21b32e6a0ab5b174fa1ca2fb4c212577cf405d83 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: bb875cd0cac23f83cbc7c976d64e2e20794281a263d96f0a97a4c198e0ed92a6 run #0: crashed: possible deadlock in seq_read_iter run #1: crashed: possible deadlock in lookup_slow 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 good 21b32e6a0ab5b174fa1ca2fb4c212577cf405d83 Bisecting: 0 revisions left to test after this (roughly 1 step) [da40448ce4eb4de18eb7b0db61dddece32677939] fs: move file_start_write() into direct_splice_actor() determine whether the revision contains the guilty commit revision b85ea95d086471afb4ad062012a4d73cd328fa86 crashed and is reachable testing commit da40448ce4eb4de18eb7b0db61dddece32677939 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c45a69adbaf5bf68e4ed2b27b05c4dd0d4a6981c0093ed6ccb292666b95e9ef4 all runs: OK false negative chance: 0.000 # git bisect bad da40448ce4eb4de18eb7b0db61dddece32677939 Bisecting: 0 revisions left to test after this (roughly 0 steps) [488e8f685207e0758398963d6834f81e5e61c162] fs: fork splice_file_range() from do_splice_direct() determine whether the revision contains the guilty commit revision 8802e580ee643e3f63c6b39ff64e7c7baa4a55ba crashed and is reachable testing commit 488e8f685207e0758398963d6834f81e5e61c162 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 36a6cfb6338df8930db40889b2e62d25bfc53dc8281d9262c1aafde0d96c6764 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 good 488e8f685207e0758398963d6834f81e5e61c162 da40448ce4eb4de18eb7b0db61dddece32677939 is the first bad commit commit da40448ce4eb4de18eb7b0db61dddece32677939 Author: Amir Goldstein Date: Thu Nov 30 16:16:23 2023 +0200 fs: move file_start_write() into direct_splice_actor() The callers of do_splice_direct() hold file_start_write() on the output file. This may cause file permission hooks to be called indirectly on an overlayfs lower layer, which is on the same filesystem of the output file and could lead to deadlock with fanotify permission events. To fix this potential deadlock, move file_start_write() from the callers into the direct_splice_actor(), so file_start_write() will not be held while splicing from the input file. Suggested-by: Josef Bacik Link: https://lore.kernel.org/r/20231128214258.GA2398475@perftesting/ Reviewed-by: Jan Kara Signed-off-by: Amir Goldstein Link: https://lore.kernel.org/r/20231130141624.3338942-3-amir73il@gmail.com Signed-off-by: Christian Brauner fs/overlayfs/copy_up.c | 2 -- fs/read_write.c | 2 -- fs/splice.c | 19 ++++++++++++++++--- 3 files changed, 16 insertions(+), 7 deletions(-) accumulated error probability: 0.00 culprit signature: c45a69adbaf5bf68e4ed2b27b05c4dd0d4a6981c0093ed6ccb292666b95e9ef4 parent signature: 36a6cfb6338df8930db40889b2e62d25bfc53dc8281d9262c1aafde0d96c6764 revisions tested: 23, total time: 5h9m18.856480627s (build: 1h45m47.973475231s, test: 3h7m11.162163146s) first good commit: da40448ce4eb4de18eb7b0db61dddece32677939 fs: move file_start_write() into direct_splice_actor() recipients (to): ["amir73il@gmail.com" "brauner@kernel.org" "jack@suse.cz"] recipients (cc): []