ci starts bisection 2025-01-18 13:34:13.315211482 +0000 UTC m=+42789.647312693 bisecting fixing commit since ac347a0655dbc7d885e217c89dddd16e2800bd58 building syzkaller on 6d6dbf8ab21a52df701946afac2a86f93a88fdc8 ensuring issue is reproducible on original commit ac347a0655dbc7d885e217c89dddd16e2800bd58 testing commit ac347a0655dbc7d885e217c89dddd16e2800bd58 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 371cce4048c025cd92a5405fc8933793f66f8618c874afd588c8ff579e01ab2d all runs: crashed: divide error in drm_mode_debug_printmodeline representative crash: divide error in drm_mode_debug_printmodeline, types: [UNKNOWN] check whether we can drop unnecessary instrumentation disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP HANG], they are not needed testing commit ac347a0655dbc7d885e217c89dddd16e2800bd58 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b41b0f22380e7a706e5837b6f4ad2f89493ed642eedd2cbb11294964d51b3375 all runs: crashed: divide error in drm_mode_debug_printmodeline representative crash: divide error in drm_mode_debug_printmodeline, types: [UNKNOWN] the bug reproduces without the instrumentation disabling configs for [HANG LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed kconfig minimization: base=4037 full=7650 leaves diff=2012 split chunks (needed=false): <2012> split chunk #0 of len 2012 into 5 parts testing without sub-chunk 1/5 disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN], they are not needed testing commit ac347a0655dbc7d885e217c89dddd16e2800bd58 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 48331fe58073fba7b72efb6f3daa9fb94293d3cae0f80aa6ddb25031a6c1f30a all runs: crashed: divide error in drm_mode_debug_printmodeline representative crash: divide error in drm_mode_debug_printmodeline, types: [UNKNOWN] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN], they are not needed testing commit ac347a0655dbc7d885e217c89dddd16e2800bd58 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 379434f4552bf4c10a8ffb9b5fcb46f9cf74b1644d0f4e451761d10ac4a6ec4a all runs: OK false negative chance: 0.000 testing without sub-chunk 3/5 disabling configs for [HANG LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit ac347a0655dbc7d885e217c89dddd16e2800bd58 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 221bf33594215f94ab2d82e510a30fc3b35bcc64f4111dec88b5c02364de658e all runs: crashed: divide error in drm_mode_debug_printmodeline representative crash: divide error in drm_mode_debug_printmodeline, types: [UNKNOWN] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN], they are not needed testing commit ac347a0655dbc7d885e217c89dddd16e2800bd58 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 8f263f332e2c07a565903d3fb3a8fa76f73d81943ff86c0777341c6a4a49f6d8 all runs: crashed: divide error in drm_mode_debug_printmodeline representative crash: divide error in drm_mode_debug_printmodeline, types: [UNKNOWN] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed testing commit ac347a0655dbc7d885e217c89dddd16e2800bd58 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 53bdade971391cf77462082c08e56595eb9cee1a3dfedae6e42002ebccd19be4 all runs: crashed: divide error in drm_mode_debug_printmodeline representative crash: divide error in drm_mode_debug_printmodeline, types: [UNKNOWN] the chunk can be dropped minimized to 403 configs; suspects: [6LOWPAN ARCH_ENABLE_MEMORY_HOTREMOVE ASUS_WMI CMA COMMON_CLK DAX DLM DRM DRM_BRIDGE DRM_DISPLAY_HELPER DRM_DP_AUX_BUS DRM_DP_AUX_CHARDEV DRM_FBDEV_EMULATION DRM_GEM_SHMEM_HELPER DRM_I915 DRM_I915_CAPTURE_ERROR DRM_I915_COMPRESS_ERROR DRM_I915_USERPTR DRM_KMS_HELPER DRM_MIPI_DSI DRM_PANEL DRM_PANEL_BRIDGE DRM_PANEL_EDP DRM_PANEL_ORIENTATION_QUIRKS DRM_SIMPLEDRM DRM_TTM DRM_TTM_HELPER DRM_UDL DRM_VGEM DRM_VIRTIO_GPU DRM_VIRTIO_GPU_KMS DRM_VKMS DRM_VMWGFX DRM_VRAM_HELPER DUMMY DVB_AF9013 DVB_AF9033 DVB_AS102 DVB_AS102_FE DVB_B2C2_FLEXCOP DVB_B2C2_FLEXCOP_USB DVB_CORE DVB_DIB3000MB DVB_DIB3000MC DVB_EC100 DVB_GP8PSK_FE DVB_RTL2830 DVB_RTL2832 DVB_RTL2832_SDR DVB_TEST_DRIVERS DVB_TTUSB_BUDGET DVB_TTUSB_DEC DVB_USB DVB_USB_A800 DVB_USB_AF9005 DVB_USB_AF9005_REMOTE DVB_USB_AF9015 DVB_USB_AF9035 DVB_USB_ANYSEE DVB_USB_AU6610 DVB_USB_AZ6007 DVB_USB_AZ6027 DVB_USB_CE6230 DVB_USB_CINERGY_T2 DVB_USB_CXUSB DVB_USB_DIB0700 DVB_USB_DIB3000MC DVB_USB_DIBUSB_MB DVB_USB_DIBUSB_MC DVB_USB_DIGITV DVB_USB_DTT200U DVB_USB_DTV5100 DVB_USB_DVBSKY DVB_USB_DW2102 DVB_USB_EC168 DVB_USB_GL861 DVB_USB_GP8PSK DVB_USB_LME2510 DVB_USB_M920X DVB_USB_MXL111SF DVB_USB_NOVA_T_USB2 DVB_USB_OPERA1 DVB_USB_PCTV452E DVB_USB_RTL28XXU DVB_USB_TECHNISAT_USB2 DVB_USB_TTUSB2 DVB_USB_UMT_010 DVB_USB_V2 DVB_USB_VP702X DVB_USB_VP7045 DVB_USB_ZD1301 DVB_VIDTV DVB_ZL10353 ECRYPT_FS ECRYPT_FS_MESSAGING EDAC EEPROM_93CX6 EFS_FS ENCRYPTED_KEYS EQUALIZER EROFS_FS EROFS_FS_POSIX_ACL EROFS_FS_SECURITY EROFS_FS_XATTR EROFS_FS_ZIP EVM EVM_ADD_XATTRS EVM_ATTR_FSUUID EVM_EXTRA_SMACK_XATTRS EXFAT_FS EXPORTFS_BLOCK_OPS EXT3_FS EXT3_FS_POSIX_ACL EXT3_FS_SECURITY EXTCON EXTCON_INTEL_CHT_WC F2FS_CHECK_FS F2FS_FAULT_INJECTION F2FS_FS F2FS_FS_COMPRESSION F2FS_FS_LZ4 F2FS_FS_LZ4HC F2FS_FS_LZO F2FS_FS_LZORLE F2FS_FS_POSIX_ACL F2FS_FS_SECURITY F2FS_FS_XATTR F2FS_FS_ZSTD F2FS_STAT_FS FANOTIFY FANOTIFY_ACCESS_PERMISSIONS FB FB_CFB_COPYAREA FB_CFB_FILLRECT FB_CFB_IMAGEBLIT FB_CORE FB_DEFERRED_IO FB_IOMEM_FOPS FB_IOMEM_HELPERS FB_NOTIFY FB_SYSMEM_HELPERS FB_SYSMEM_HELPERS_DEFERRED FB_SYS_COPYAREA FB_SYS_FILLRECT FB_SYS_FOPS FB_SYS_IMAGEBLIT FB_TILEBLITTING FB_VESA FB_VGA16 FB_VIRTUAL FDDI FIREWIRE FIREWIRE_NET FIREWIRE_OHCI FIREWIRE_SBP2 FONT_8x16 FONT_8x8 FONT_SUPPORT FRAMEBUFFER_CONSOLE FRAMEBUFFER_CONSOLE_DETECT_PRIMARY FRAMEBUFFER_CONSOLE_ROTATION FS_DAX FS_DAX_PMD FS_ENCRYPTION FS_ENCRYPTION_ALGS FS_VERITY FS_VERITY_BUILTIN_SIGNATURES FTL FUSE_DAX FUSE_FS FW_LOADER_COMPRESS FW_LOADER_PAGED_BUF FW_LOADER_SYSFS FW_LOADER_USER_HELPER FW_LOADER_USER_HELPER_FALLBACK GACT_PROB GARP GCC11_NO_ARRAY_BOUNDS GENERIC_PHY GET_FREE_REGION GFS2_FS GFS2_FS_LOCKING_DLM GOOGLE_COREBOOT_TABLE GOOGLE_FIRMWARE GOOGLE_MEMCONSOLE GOOGLE_MEMCONSOLE_COREBOOT GOOGLE_VPD GPIOLIB GPIOLIB_IRQCHIP GPIO_ACPI GPIO_DLN2 GPIO_VIPERBOARD GREENASIA_FF GREYBUS GREYBUS_BRIDGED_PHY GREYBUS_ES2 GREYBUS_HID GREYBUS_USB GTP GUEST_PERF_EVENTS GVE HAVE_ARCH_NODE_DEV_GROUP HAVE_ARCH_USERFAULTFD_MINOR HAVE_ARCH_USERFAULTFD_WP HAVE_BOOTMEM_INFO_NODE HAVE_CLK_PREPARE HAVE_FAST_GUP HAVE_KVM_CPU_RELAX_INTERCEPT HAVE_KVM_DIRTY_RING HAVE_KVM_DIRTY_RING_ACQ_REL HAVE_KVM_DIRTY_RING_TSO HAVE_KVM_EVENTFD HAVE_KVM_IRQCHIP HAVE_KVM_IRQFD HAVE_KVM_IRQ_BYPASS HAVE_KVM_IRQ_ROUTING HAVE_KVM_MSI HAVE_KVM_NO_POLL HAVE_KVM_PFNCACHE HAVE_KVM_PM_NOTIFIER HAVE_SCHED_AVG_IRQ HDLC HDLC_CISCO HDLC_FR HDLC_PPP HDLC_RAW HDLC_RAW_ETH HDLC_X25 HDMI HFSPLUS_FS HFS_FS HID_ACCUTOUCH HID_ACRUX HID_ACRUX_FF HID_ALPS HID_APPLEIR HID_ASUS HID_AUREAL HID_BATTERY_STRENGTH HID_BETOP_FF HID_CMEDIA HID_CORSAIR HID_CP2112 HID_ELECOM HID_ELO HID_EMS_FF HID_GEMBIRD HID_GFRM HID_GREENASIA HID_GT683R HID_HOLTEK HID_ICADE HID_KEYTOUCH HID_KYE HID_LCPOWER HID_LED HID_LENOVO HID_LOGITECH_DJ HID_LOGITECH_HIDPP HID_MAGICMOUSE HID_MAYFLASH HID_MULTITOUCH HID_NTI HID_ORTEK HID_PENMOUNT HID_PICOLCD HID_PICOLCD_BACKLIGHT HID_PICOLCD_CIR HID_PICOLCD_FB HID_PICOLCD_LCD HID_PICOLCD_LEDS HID_PLANTRONICS HID_PRIMAX HID_PRODIKEYS HID_RETRODE HID_RMI HID_ROCCAT HID_SAITEK HID_SENSOR_ACCEL_3D HID_SENSOR_ALS HID_SENSOR_CUSTOM_SENSOR HID_SENSOR_DEVICE_ROTATION HID_SENSOR_GYRO_3D HID_SENSOR_HUB HID_SENSOR_HUMIDITY HID_SENSOR_IIO_COMMON HID_SENSOR_IIO_TRIGGER HID_SENSOR_INCLINOMETER_3D HID_SENSOR_MAGNETOMETER_3D HID_SENSOR_PRESS HID_SENSOR_PROX HID_SENSOR_TEMP HID_SPEEDLINK HID_STEELSERIES HID_THINGM HID_TIVO HID_TWINHAN HID_UCLOGIC HID_UDRAW_PS3 HID_WACOM HID_WALTOP HID_WIIMOTE HID_XINMO HID_ZYDACRON HMM_MIRROR HOLTEK_FF HOTPLUG_PCI_PCIE HPET_MMAP HPET_MMAP_DEFAULT HPFS_FS I2C_ALGOBIT I2C_CHARDEV I2C_DESIGNWARE_CORE I2C_DESIGNWARE_PLATFORM I2C_DIOLAN_U2C I2C_DLN2 I2C_MUX I2C_MUX_REG I2C_ROBOTFUZZ_OSIF I2C_SI4713 I2C_SLAVE I2C_SLAVE_EEPROM I2C_TINY_USB I2C_VIPERBOARD IEEE802154 IEEE802154_6LOWPAN IEEE802154_ATUSB IEEE802154_DRIVERS IEEE802154_HWSIM IEEE802154_NL802154_EXPERIMENTAL IEEE802154_SOCKET IFB IIO IIO_BUFFER IIO_KFIFO_BUF IIO_TRIGGER IIO_TRIGGERED_BUFFER IKCONFIG IKCONFIG_PROC IMA IMA_DEFAULT_HASH_SHA256 IMA_LSM_RULES IMA_MEASURE_ASYMMETRIC_KEYS IMA_NG_TEMPLATE IMA_QUEUE_EARLY_BOOT_KEYS IMA_READ_POLICY IMA_WRITE_POLICY INET6_ESPINTCP INET6_ESP_OFFLOAD INET6_IPCOMP INET6_TUNNEL INET6_XFRM_TUNNEL INET_AH INET_DCCP_DIAG INET_DIAG INET_DIAG_DESTROY INET_ESP INET_ESPINTCP INET_ESP_OFFLOAD INET_IPCOMP INET_MPTCP_DIAG INET_RAW_DIAG INET_SCTP_DIAG INET_TCP_DIAG INET_UDP_DIAG INET_XFRM_TUNNEL INFINIBAND INFINIBAND_ADDR_TRANS INFINIBAND_ADDR_TRANS_CONFIGFS INFINIBAND_IPOIB INFINIBAND_IPOIB_CM INFINIBAND_IPOIB_DEBUG INFINIBAND_ISER INFINIBAND_ON_DEMAND_PAGING INFINIBAND_RTRS INFINIBAND_SRP INFINIBAND_USER_ACCESS INFINIBAND_USER_MAD INFINIBAND_USER_MEM INPUT_ATI_REMOTE2 INPUT_CM109 INPUT_IMS_PCU INPUT_JOYDEV INPUT_KEYSPAN_REMOTE INPUT_LEDS INPUT_MOUSEDEV INPUT_MOUSEDEV_PSAUX INPUT_POWERMATE INPUT_UINPUT INPUT_YEALINK INTEGRITY INTEGRITY_ASYMMETRIC_KEYS INTEGRITY_AUDIT INTEGRITY_SIGNATURE INTEGRITY_TRUSTED_KEYRING INTEL_IDMA64 INTEL_IOATDMA INTEL_IOMMU_DEFAULT_ON INTEL_IOMMU_SVM INTEL_ISH_HID INTEL_SOC_PMIC_CHTWC INTERVAL_TREE_SPAN_ITER IOMMUFD IOMMUFD_DRIVER IOMMUFD_TEST IP6_NF_MATCH_AH IP6_NF_MATCH_EUI64 IP6_NF_MATCH_FRAG IP6_NF_MATCH_HL IP6_NF_MATCH_MH IP6_NF_MATCH_OPTS IP6_NF_MATCH_RPFILTER IP6_NF_MATCH_RT IP6_NF_MATCH_SRH IP6_NF_NAT IP6_NF_RAW IP6_NF_SECURITY IP6_NF_TARGET_HL IP6_NF_TARGET_MASQUERADE IP6_NF_TARGET_NPT IP6_NF_TARGET_SYNPROXY IPV6_FOU IPV6_FOU_TUNNEL IPV6_GRE IPV6_ILA IPV6_MIP6 IPV6_MROUTE IPV6_MROUTE_MULTIPLE_TABLES IPV6_MULTIPLE_TABLES IPV6_OPTIMISTIC_DAD IPV6_PIMSM_V2 IPV6_ROUTER_PREF IPV6_ROUTE_INFO IPV6_RPL_LWTUNNEL IPV6_SEG6_BPF IPV6_SEG6_HMAC IPV6_SEG6_LWTUNNEL IPV6_SIT_6RD IPV6_SUBTREES IPV6_TUNNEL IPV6_VTI IPVLAN IPVLAN_L3S IPVTAP IP_DCCP IP_DCCP_CCID3 IP_DCCP_TFRC_LIB IP_FIB_TRIE_STATS IP_MROUTE_MULTIPLE_TABLES IP_NF_ARPFILTER IP_NF_ARPTABLES IP_NF_ARP_MANGLE IP_NF_MATCH_AH IP_NF_MATCH_ECN IP_NF_MATCH_RPFILTER IP_NF_MATCH_TTL IP_NF_RAW IP_NF_SECURITY IP_NF_TARGET_ECN IP_NF_TARGET_NETMAP IP_NF_TARGET_REDIRECT IP_NF_TARGET_SYNPROXY IP_NF_TARGET_TTL IP_ROUTE_CLASSID IP_SCTP IP_SET IP_SET_BITMAP_IP IP_SET_BITMAP_IPMAC IP_SET_BITMAP_PORT IP_SET_HASH_IP IP_SET_HASH_IPMAC IP_SET_HASH_IPMARK IP_SET_HASH_IPPORT IP_SET_HASH_IPPORTIP IP_SET_HASH_IPPORTNET IP_SET_HASH_MAC IP_SET_HASH_NET IP_SET_HASH_NETIFACE IP_SET_HASH_NETNET IP_SET_HASH_NETPORT IP_SET_HASH_NETPORTNET IP_SET_LIST_SET IP_VS IP_VS_DH IP_VS_FO IP_VS_FTP IP_VS_IPV6 IP_VS_LBLC IP_VS_LBLCR IP_VS_LC IP_VS_MH IP_VS_NFCT IP_VS_NQ IP_VS_OVF IP_VS_PE_SIP IP_VS_PROTO_AH IP_VS_PROTO_AH_ESP IP_VS_PROTO_TCP IP_VS_PROTO_UDP IRQ_TIME_ACCOUNTING LAPB LCD_CLASS_DEVICE MAC802154 MEDIA_DIGITAL_TV_SUPPORT MEDIA_RADIO_SUPPORT MEDIA_SDR_SUPPORT MEDIA_SUPPORT MEDIA_TEST_SUPPORT MEDIA_USB_SUPPORT MEMORY_HOTPLUG MEMORY_HOTREMOVE MFD_DLN2 MFD_VIPERBOARD MPTCP MTD NETFILTER_ADVANCED NET_ACT_GACT NET_ACT_MIRRED NET_IPGRE_DEMUX NFT_FWD_NETDEV NF_TABLES NF_TABLES_NETDEV RADIO_ADAPTERS RADIO_SI4713 RAS RC_CORE RFKILL SND SOUND STAGING TRANSPARENT_HUGEPAGE VIDEO_DEV VIRTIO_FS WAN ZONE_DEVICE] disabling configs for [UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK], they are not needed testing current HEAD 595523945be0a5a2f12a1c04772383293fbc04a1 testing commit 595523945be0a5a2f12a1c04772383293fbc04a1 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: eb944ce28a3eb38c441a7e83a7a1d85b9b012e80451205688d1270dd25993da5 all runs: OK false negative chance: 0.000 # git bisect start 595523945be0a5a2f12a1c04772383293fbc04a1 ac347a0655dbc7d885e217c89dddd16e2800bd58 Bisecting: 46100 revisions left to test after this (roughly 16 steps) [6c8b1a2dca0b98775f75a59ddf5f62b6c9512b75] Merge tag '6.10-rc-ksmbd-server-fixes' of git://git.samba.org/ksmbd determine whether the revision contains the guilty commit revision ac347a0655dbc7d885e217c89dddd16e2800bd58 crashed and is reachable testing commit 6c8b1a2dca0b98775f75a59ddf5f62b6c9512b75 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 5473c4e3b9fcd5c64ac3de0dc1240197c96c826104700d1b084f56c843744b71 all runs: crashed: divide error in drm_mode_vrefresh representative crash: divide error in drm_mode_vrefresh, types: [UNKNOWN] # git bisect good 6c8b1a2dca0b98775f75a59ddf5f62b6c9512b75 Bisecting: 23084 revisions left to test after this (roughly 15 steps) [d5e65d1fb75ffbe3aba33de81a72752ace28295e] Merge tag 'tpmdd-next-6.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd determine whether the revision contains the guilty commit revision ac347a0655dbc7d885e217c89dddd16e2800bd58 crashed and is reachable testing commit d5e65d1fb75ffbe3aba33de81a72752ace28295e gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: f1a244a42b6fc8204823a1f0d927407462fbd5df4963b9118928e42bdecbbc94 all runs: crashed: divide error in drm_mode_vrefresh representative crash: divide error in drm_mode_vrefresh, types: [UNKNOWN] # git bisect good d5e65d1fb75ffbe3aba33de81a72752ace28295e Bisecting: 11525 revisions left to test after this (roughly 14 steps) [9f5a6a1fe690a43896e0235377c7eb0b657c05a9] Merge tag 'media/v6.13-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media determine whether the revision contains the guilty commit revision ac347a0655dbc7d885e217c89dddd16e2800bd58 crashed and is reachable testing commit 9f5a6a1fe690a43896e0235377c7eb0b657c05a9 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 2899d193fdb687399653985e3bb285c3add9ccf3848c819ca5d563db489a6d2b all runs: crashed: divide error in drm_mode_vrefresh representative crash: divide error in drm_mode_vrefresh, types: [UNKNOWN] # git bisect good 9f5a6a1fe690a43896e0235377c7eb0b657c05a9 Bisecting: 5747 revisions left to test after this (roughly 13 steps) [2a163a4cea153348172e260a0c5b5569103a66a3] Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma determine whether the revision contains the guilty commit revision 9f5a6a1fe690a43896e0235377c7eb0b657c05a9 crashed and is reachable testing commit 2a163a4cea153348172e260a0c5b5569103a66a3 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a8c06b9c56fcb3cfcebb9c8a65e799a964ca6114e561a5cb37229de52e10b42c all runs: crashed: divide error in drm_mode_vrefresh representative crash: divide error in drm_mode_vrefresh, types: [UNKNOWN] # git bisect good 2a163a4cea153348172e260a0c5b5569103a66a3 Bisecting: 2974 revisions left to test after this (roughly 12 steps) [55cb93fd243bad2c6e15f9151a32f575d2f5371f] Merge tag 'driver-core-6.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core determine whether the revision contains the guilty commit revision 2a163a4cea153348172e260a0c5b5569103a66a3 crashed and is reachable testing commit 55cb93fd243bad2c6e15f9151a32f575d2f5371f gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 997fddd1942db5fb382bfdf7063fdc52988bbfe2e6dfed82ce50a333cde1d5fc all runs: crashed: divide error in drm_mode_vrefresh representative crash: divide error in drm_mode_vrefresh, types: [UNKNOWN] # git bisect good 55cb93fd243bad2c6e15f9151a32f575d2f5371f Bisecting: 1521 revisions left to test after this (roughly 11 steps) [12f2930f5f91bc0d67794c69d1961098c7c72040] xfs: port xfs_ioc_start_commit to multigrain timestamps determine whether the revision contains the guilty commit revision 9f5a6a1fe690a43896e0235377c7eb0b657c05a9 crashed and is reachable testing commit 12f2930f5f91bc0d67794c69d1961098c7c72040 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: f048c62bc8e366605d58928d1351fa98a7f972c27d206e5f0d2529189ec220dd all runs: crashed: divide error in drm_mode_vrefresh representative crash: divide error in drm_mode_vrefresh, types: [UNKNOWN] # git bisect good 12f2930f5f91bc0d67794c69d1961098c7c72040 Bisecting: 760 revisions left to test after this (roughly 10 steps) [4099a71718b056d16af5ba095c91016c3b107862] Merge tag 'sched-urgent-2024-12-29' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip determine whether the revision contains the guilty commit revision 6c8b1a2dca0b98775f75a59ddf5f62b6c9512b75 crashed and is reachable testing commit 4099a71718b056d16af5ba095c91016c3b107862 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 4f4ce640e5f39d09feb9d19d4e08aebcc36fe9cdac7ed7cea7479c6f94c22f9d all runs: OK false negative chance: 0.000 # git bisect bad 4099a71718b056d16af5ba095c91016c3b107862 Bisecting: 379 revisions left to test after this (roughly 9 steps) [a241d7f0d3a289a52b5245ec1f486d57c8f3c97b] Merge tag 's390-6.13-3' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux determine whether the revision contains the guilty commit revision ac347a0655dbc7d885e217c89dddd16e2800bd58 crashed and is reachable testing commit a241d7f0d3a289a52b5245ec1f486d57c8f3c97b gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: fe084f0979639fb016d574c86bd96ae14013d87ec670d6cac03ad36b7aec602c all runs: crashed: divide error in drm_mode_vrefresh representative crash: divide error in drm_mode_vrefresh, types: [UNKNOWN] # git bisect good a241d7f0d3a289a52b5245ec1f486d57c8f3c97b Bisecting: 190 revisions left to test after this (roughly 8 steps) [be6bb3619eeda0cd3a52ead9e63c5795ac87f0c5] Merge tag 'thermal-6.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm determine whether the revision contains the guilty commit revision d5e65d1fb75ffbe3aba33de81a72752ace28295e crashed and is reachable testing commit be6bb3619eeda0cd3a52ead9e63c5795ac87f0c5 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a5fe926bf1d847b734a63e2227ab4e6246e434b85efca06223a8a7285c41d223 all runs: OK false negative chance: 0.000 # git bisect bad be6bb3619eeda0cd3a52ead9e63c5795ac87f0c5 Bisecting: 92 revisions left to test after this (roughly 7 steps) [8faabc041a001140564f718dabe37753e88b37fa] Merge tag 'net-6.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net determine whether the revision contains the guilty commit revision 6c8b1a2dca0b98775f75a59ddf5f62b6c9512b75 crashed and is reachable testing commit 8faabc041a001140564f718dabe37753e88b37fa gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 73480a9b77c835105f0a4da959796e62d83556a23a86500cbebdbf9dfcb0365f all runs: crashed: divide error in drm_mode_vrefresh representative crash: divide error in drm_mode_vrefresh, types: [UNKNOWN] # git bisect good 8faabc041a001140564f718dabe37753e88b37fa Bisecting: 48 revisions left to test after this (roughly 6 steps) [5127e1495b04c4516f3d9ab5bd6f241873793245] Merge tag 'spi-fix-v6.13-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi determine whether the revision contains the guilty commit revision ac347a0655dbc7d885e217c89dddd16e2800bd58 crashed and is reachable testing commit 5127e1495b04c4516f3d9ab5bd6f241873793245 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 55b0e1b729b1c42125cd61e04930c69969128312d1d8487b24aabb29722cb4ab all runs: OK false negative chance: 0.000 # git bisect bad 5127e1495b04c4516f3d9ab5bd6f241873793245 Bisecting: 19 revisions left to test after this (roughly 5 steps) [87fd88332567e22986d4989d912a1e44f164dc7d] Merge tag 'drm-misc-fixes-2024-12-19' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-fixes determine whether the revision contains the guilty commit revision d5e65d1fb75ffbe3aba33de81a72752ace28295e crashed and is reachable testing commit 87fd88332567e22986d4989d912a1e44f164dc7d gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b091d0bbe8e2c64c393c61afb449cb185214a5e8f8607c79594a2fdb9bcac4de all runs: OK false negative chance: 0.000 # git bisect bad 87fd88332567e22986d4989d912a1e44f164dc7d Bisecting: 11 revisions left to test after this (roughly 4 steps) [9398332f23fab10c5ec57c168b44e72997d6318e] drm/modes: Avoid divide by zero harder in drm_mode_vrefresh() determine whether the revision contains the guilty commit revision d5e65d1fb75ffbe3aba33de81a72752ace28295e crashed and is reachable testing commit 9398332f23fab10c5ec57c168b44e72997d6318e gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 1c2ad87c8d1c420fa1efd48392594af7e14ceca1e1bd9a5976d0b42dd1fb23e0 all runs: OK false negative chance: 0.000 # git bisect bad 9398332f23fab10c5ec57c168b44e72997d6318e Bisecting: 5 revisions left to test after this (roughly 3 steps) [0cff90dec63da908fb16d9ea2872ebbcd2d18e6a] dma-buf: Fix __dma_buf_debugfs_list_del argument for !CONFIG_DEBUG_FS determine whether the revision contains the guilty commit revision ac347a0655dbc7d885e217c89dddd16e2800bd58 crashed and is reachable testing commit 0cff90dec63da908fb16d9ea2872ebbcd2d18e6a gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 477c8fd5a8b3fc9e954e8232366f199afaac01539754cf607c7058c37be888e1 all runs: crashed: divide error in drm_mode_vrefresh representative crash: divide error in drm_mode_vrefresh, types: [UNKNOWN] # git bisect good 0cff90dec63da908fb16d9ea2872ebbcd2d18e6a Bisecting: 2 revisions left to test after this (roughly 2 steps) [406dd4c7984a457567ca652455d5efad81983f02] drm/panel: st7701: Add prepare_prev_first flag to drm_panel determine whether the revision contains the guilty commit revision 2a163a4cea153348172e260a0c5b5569103a66a3 crashed and is reachable testing commit 406dd4c7984a457567ca652455d5efad81983f02 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 85c8aff2a03c68f84805d79ba4b045c76061e84d3201f6f2a7b59e7dac2ace6f all runs: crashed: divide error in drm_mode_vrefresh representative crash: divide error in drm_mode_vrefresh, types: [UNKNOWN] # git bisect good 406dd4c7984a457567ca652455d5efad81983f02 Bisecting: 0 revisions left to test after this (roughly 1 step) [080b2e7b5e9ad23343e4b11f0751e4c724a78958] drm/display: use ERR_PTR on DP tunnel manager creation fail determine whether the revision contains the guilty commit revision 406dd4c7984a457567ca652455d5efad81983f02 crashed and is reachable testing commit 080b2e7b5e9ad23343e4b11f0751e4c724a78958 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: d2c0a52ef41a2302265d29d8237652faca05bbecc0f4093fd5fc83a433fc8e07 all runs: crashed: divide error in drm_mode_vrefresh representative crash: divide error in drm_mode_vrefresh, types: [UNKNOWN] # git bisect good 080b2e7b5e9ad23343e4b11f0751e4c724a78958 9398332f23fab10c5ec57c168b44e72997d6318e is the first bad commit commit 9398332f23fab10c5ec57c168b44e72997d6318e Author: Ville Syrjälä Date: Fri Nov 29 06:26:28 2024 +0200 drm/modes: Avoid divide by zero harder in drm_mode_vrefresh() drm_mode_vrefresh() is trying to avoid divide by zero by checking whether htotal or vtotal are zero. But we may still end up with a div-by-zero of vtotal*htotal*... Cc: stable@vger.kernel.org Reported-by: syzbot+622bba18029bcde672e1@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=622bba18029bcde672e1 Signed-off-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20241129042629.18280-2-ville.syrjala@linux.intel.com Reviewed-by: Jani Nikula drivers/gpu/drm/drm_modes.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) accumulated error probability: 0.00 culprit signature: 1c2ad87c8d1c420fa1efd48392594af7e14ceca1e1bd9a5976d0b42dd1fb23e0 parent signature: d2c0a52ef41a2302265d29d8237652faca05bbecc0f4093fd5fc83a433fc8e07 revisions tested: 24, total time: 4h50m20.518165576s (build: 2h25m2.066893692s, test: 1h59m5.102718794s) first good commit: 9398332f23fab10c5ec57c168b44e72997d6318e drm/modes: Avoid divide by zero harder in drm_mode_vrefresh() recipients (to): ["airlied@gmail.com" "dri-devel@lists.freedesktop.org" "jani.nikula@intel.com" "maarten.lankhorst@linux.intel.com" "mripard@kernel.org" "simona@ffwll.ch" "tzimmermann@suse.de" "ville.syrjala@linux.intel.com"] recipients (cc): ["linux-kernel@vger.kernel.org"]