ci starts bisection 2025-04-04 05:48:48.799491165 +0000 UTC m=+37281.477658282 bisecting cause commit starting from a2cc6ff5ec8f91bc463fd3b0c26b61166a07eb11 building syzkaller on d7ae3a111bd75df44dda69b37da945b50d5133e2 ensuring issue is reproducible on original commit a2cc6ff5ec8f91bc463fd3b0c26b61166a07eb11 testing commit a2cc6ff5ec8f91bc463fd3b0c26b61166a07eb11 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: ddf424bfbee2e3600bd46b7ba423c4e21023b072bf7d08d5b69f5d322f7928ac run #0: basic kernel testing failed: lost connection to test machine run #1: crashed: general protection fault in mremap run #2: crashed: general protection fault in mremap run #3: crashed: general protection fault in mremap run #4: crashed: general protection fault in mremap run #5: crashed: general protection fault in mremap run #6: crashed: general protection fault in mremap run #7: crashed: general protection fault in mremap run #8: crashed: general protection fault in mremap run #9: crashed: general protection fault in mremap run #10: crashed: general protection fault in mremap run #11: crashed: general protection fault in mremap run #12: crashed: general protection fault in mremap run #13: crashed: general protection fault in mremap run #14: crashed: general protection fault in mremap run #15: crashed: general protection fault in mremap run #16: crashed: general protection fault in mremap run #17: crashed: general protection fault in mremap run #18: crashed: general protection fault in mremap run #19: crashed: general protection fault in mremap representative crash: general protection fault in mremap, types: [UNKNOWN] check whether we can drop unnecessary instrumentation disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed testing commit a2cc6ff5ec8f91bc463fd3b0c26b61166a07eb11 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c6ac49493db9a509f503b3a1c8eb8a954dd4574883a4a79d36cfdc9376be0387 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in mremap representative crash: BUG: unable to handle kernel NULL pointer dereference in mremap, 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=4083 full=8323 leaves diff=2125 split chunks (needed=false): <2125> split chunk #0 of len 2125 into 5 parts testing without sub-chunk 1/5 disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP HANG], they are not needed testing commit a2cc6ff5ec8f91bc463fd3b0c26b61166a07eb11 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 2c4b136da717deaaf8a03634f79e2b8dbe91256c416d3248c8aa6c76fa87e55f all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in mremap representative crash: BUG: unable to handle kernel NULL pointer dereference in mremap, 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 a2cc6ff5ec8f91bc463fd3b0c26b61166a07eb11 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 failed building a2cc6ff5ec8f91bc463fd3b0c26b61166a07eb11: drivers/gpu/drm/bridge/aux-bridge.c:116: undefined reference to `devm_drm_of_get_bridge' testing without sub-chunk 3/5 disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP HANG], they are not needed testing commit a2cc6ff5ec8f91bc463fd3b0c26b61166a07eb11 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 080b492d7a97ee81e93d2e6c098dbae21cc80eec7ed87af420ac282e3dadd411 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in mremap representative crash: BUG: unable to handle kernel NULL pointer dereference in mremap, types: [UNKNOWN] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed testing commit a2cc6ff5ec8f91bc463fd3b0c26b61166a07eb11 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 136a45c2dc96bca43a2b6409367df5a44925433e018318cfbb0a3aebc0ba69ba all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in mremap representative crash: BUG: unable to handle kernel NULL pointer dereference in mremap, types: [UNKNOWN] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN], they are not needed testing commit a2cc6ff5ec8f91bc463fd3b0c26b61166a07eb11 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 3712b63e3cad4caf7402f2954a2a5a7b63f896bb5f2045fc07fb854b586b8905 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in mremap representative crash: BUG: unable to handle kernel NULL pointer dereference in mremap, types: [UNKNOWN] the chunk can be dropped minimized to 425 configs; suspects: [6LOWPAN ARCH_ENABLE_MEMORY_HOTREMOVE ASUS_WMI CHARGER_BQ24190 CMA COMMON_CLK DAX DLM DRM DRM_BRIDGE DRM_DISPLAY_HDMI_HELPER DRM_DISPLAY_HELPER DRM_GEM_SHMEM_HELPER DRM_GM12U320 DRM_GUD 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 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_CXUSB_ANALOG 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 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 EXFAT_FS EXPORTFS_BLOCK_OPS EXT3_FS EXT3_FS_POSIX_ACL EXT3_FS_SECURITY EXTCON EXTCON_INTEL_CHT_WC EXTCON_PTN5150 EXTCON_USBC_TUSB320 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_DEVICE FB_IOMEM_FOPS FB_IOMEM_HELPERS FB_NOTIFY FB_SYSMEM_FOPS FB_SYSMEM_HELPERS FB_SYSMEM_HELPERS_DEFERRED FB_SYS_COPYAREA FB_SYS_FILLRECT 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_STACK 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 GENDWARFKSYMS GENERIC_PHY GET_FREE_REGION GFS2_FS GFS2_FS_LOCKING_DLM GNSS GNSS_USB GOOGLE_COREBOOT_TABLE GOOGLE_FIRMWARE GOOGLE_MEMCONSOLE GOOGLE_MEMCONSOLE_COREBOOT GOOGLE_VPD GPIOLIB GPIOLIB_IRQCHIP GPIO_ACPI GPIO_DLN2 GPIO_LJCA 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_KVM_CPU_RELAX_INTERCEPT HAVE_KVM_DIRTY_RING HAVE_KVM_DIRTY_RING_ACQ_REL HAVE_KVM_DIRTY_RING_TSO HAVE_KVM_IRQCHIP HAVE_KVM_IRQ_BYPASS HAVE_KVM_IRQ_ROUTING HAVE_KVM_MSI HAVE_KVM_NO_POLL HAVE_KVM_PFNCACHE HAVE_KVM_PM_NOTIFIER HAVE_KVM_READONLY_MEM 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_BIGBEN_FF HID_CMEDIA HID_CORSAIR HID_COUGAR HID_CP2112 HID_CREATIVE_SB0540 HID_ELAN HID_ELECOM HID_ELO HID_EMS_FF HID_EVISION HID_FT260 HID_GEMBIRD HID_GFRM HID_GLORIOUS HID_GOOGLE_STADIA_FF HID_GREENASIA HID_GT683R HID_HOLTEK HID_ICADE HID_JABRA HID_KEYTOUCH HID_KYE HID_LCPOWER HID_LED HID_LENOVO HID_LETSKETCH HID_LOGITECH HID_LOGITECH_DJ HID_LOGITECH_HIDPP HID_MACALLY HID_MAGICMOUSE HID_MALTRON HID_MAYFLASH HID_MCP2200 HID_MCP2221 HID_MEGAWORLD_FF 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_PXRC HID_RAZER HID_RETRODE HID_RMI HID_ROCCAT HID_SAITEK HID_SEMITEK HID_SENSOR_ACCEL_3D HID_SENSOR_ALS HID_SENSOR_CUSTOM_INTEL_HINGE 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_SIGMAMICRO HID_SPEEDLINK HID_STEELSERIES HID_THINGM HID_TIVO HID_TOPRE HID_TWINHAN HID_U2FZERO HID_UCLOGIC HID_UDRAW_PS3 HID_VIEWSONIC HID_VIVALDI HID_VIVALDI_COMMON HID_VRC2 HID_WACOM HID_WALTOP HID_WIIMOTE HID_XIAOMI HID_XINMO HID_ZYDACRON HMM_MIRROR HOLTEK_FF HOTPLUG_PCI_PCIE HPET_MMAP HPET_MMAP_DEFAULT HPFS_FS I2C_ALGOBIT I2C_CHARDEV I2C_CP2615 I2C_DESIGNWARE_CORE I2C_DESIGNWARE_PLATFORM I2C_DIOLAN_U2C I2C_DLN2 I2C_HID_ACPI I2C_HID_CORE I2C_HID_OF I2C_LJCA 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_APPRAISE IMA_APPRAISE_MODSIG 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_CHTWC_INT33FE INTEL_IDMA64 INTEL_IOATDMA INTEL_IOMMU_DEFAULT_ON INTEL_IOMMU_SVM INTEL_ISHTP_ECLITE INTEL_ISH_FIRMWARE_DOWNLOADER INTEL_ISH_HID INTEL_SOC_PMIC_CHTWC INTERVAL_TREE_SPAN_ITER IOMMUFD IOMMUFD_DRIVER IOMMUFD_DRIVER_CORE IOMMUFD_TEST IO_URING_ZCRX 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 IRQ_TIME_ACCOUNTING LAPB LCD_CLASS_DEVICE LEDS_CLASS_MULTICOLOR 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 MODVERSIONS MPTCP MTD NETFILTER_ADVANCED NET_ACT_GACT NET_ACT_MIRRED NET_IPGRE_DEMUX NFT_COMPAT NFT_COMPAT_ARP NFT_FWD_NETDEV NF_TABLES NF_TABLES_ARP NF_TABLES_NETDEV PAGE_POOL RADIO_ADAPTERS RADIO_SI4713 RAS RC_CORE REGULATOR RFKILL SND SOUND STAGING TRANSPARENT_HUGEPAGE TYPEC TYPEC_MUX_PI3USB30532 USB_LJCA USB_ROLES_INTEL_XHCI USB_ROLE_SWITCH VIDEO_DEV VIRTIO_FS WAN ZONE_DEVICE] disabling configs for [BUG KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed picked [v6.14 v6.13 v6.12 v6.10 v6.8 v6.6 v6.4 v6.2 v5.19 v5.16 v5.13 v5.10 v5.7 v5.4 v5.1 v4.19] out of 37 release tags testing release v6.14 testing commit 38fec10eb60d687e30c8c6b5420d86e8149f7557 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 1a7d01cc9fc3afee64f5ebc1cabf1ec60d22ad9c30a4be703b6d7128b97607dd all runs: OK false negative chance: 0.000 # git bisect start a2cc6ff5ec8f91bc463fd3b0c26b61166a07eb11 38fec10eb60d687e30c8c6b5420d86e8149f7557 Bisecting: 6512 revisions left to test after this (roughly 13 steps) [2f24482304ebd32c5aa374f31465b9941a860b92] Merge tag 'soc-dt-6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc testing commit 2f24482304ebd32c5aa374f31465b9941a860b92 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7716dc4740ce69e3d4a3a1ca5a56d3ab29cc91426fbfaaf8b270b5af9f3bec19 all runs: OK false negative chance: 0.000 # git bisect good 2f24482304ebd32c5aa374f31465b9941a860b92 Bisecting: 3192 revisions left to test after this (roughly 12 steps) [e5e0e6bebef3a21081fd1057c40468d4cff1a60d] Merge tag 'v6.15-p1' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 testing commit e5e0e6bebef3a21081fd1057c40468d4cff1a60d gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 5db5dac2872fe47973771ee3b780d7232b5b90831b713fd1c31c3bf0caf0be21 all runs: OK false negative chance: 0.000 # git bisect good e5e0e6bebef3a21081fd1057c40468d4cff1a60d Bisecting: 1695 revisions left to test after this (roughly 11 steps) [08733088b566b58283f0f12fb73f5db6a9a9de30] Merge tag 'rust-fixes-6.15-merge' of git://git.kernel.org/pub/scm/linux/kernel/git/ojeda/linux testing commit 08733088b566b58283f0f12fb73f5db6a9a9de30 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 04d2110ae04850afeb03ad23c47a88d012caf1c7f35d4c914ca376aea1b58946 all runs: OK false negative chance: 0.000 # git bisect good 08733088b566b58283f0f12fb73f5db6a9a9de30 Bisecting: 827 revisions left to test after this (roughly 10 steps) [25601e85441dd91cf7973b002f27af4c5b8691ea] Merge tag 'char-misc-6.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc testing commit 25601e85441dd91cf7973b002f27af4c5b8691ea gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c8c9f14a8827d213d0890e67ef0bbc06928a87990261e63e8e94127daf444b74 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in mremap representative crash: BUG: unable to handle kernel NULL pointer dereference in mremap, types: [UNKNOWN] # git bisect bad 25601e85441dd91cf7973b002f27af4c5b8691ea Bisecting: 434 revisions left to test after this (roughly 9 steps) [eb0ece16027f8223d5dc9aaf90124f70577bd22a] Merge tag 'mm-stable-2025-03-30-16-52' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm testing commit eb0ece16027f8223d5dc9aaf90124f70577bd22a gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 70e2c6e5aec4544106e10d4429f80957ee346fbc5afe6898e7fd976839b731c6 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in mremap representative crash: BUG: unable to handle kernel NULL pointer dereference in mremap, types: [UNKNOWN] # git bisect bad eb0ece16027f8223d5dc9aaf90124f70577bd22a Bisecting: 216 revisions left to test after this (roughly 8 steps) [a58f3dcf20ea9e7e968ee8369fd782bbb53dff73] samples/damon: a typo in the kconfig - sameple testing commit a58f3dcf20ea9e7e968ee8369fd782bbb53dff73 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: f2fd7ae1c7864a88dfcd7efba7b19a9103513ee361eb6060f9792c1124e707e6 all runs: OK false negative chance: 0.000 # git bisect good a58f3dcf20ea9e7e968ee8369fd782bbb53dff73 Bisecting: 108 revisions left to test after this (roughly 7 steps) [ab71d2d301211a45420b1fb085072c79ea6a8027] mm/damon/sysfs-schemes: let damon_sysfs_scheme_set_filters() be used for different named directories testing commit ab71d2d301211a45420b1fb085072c79ea6a8027 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: f4fe77f3f9c0fd7199be971f8bb9198ed7063d858b2f64264aa36370ecf3e6cf all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in mremap representative crash: BUG: unable to handle kernel NULL pointer dereference in mremap, types: [UNKNOWN] # git bisect bad ab71d2d301211a45420b1fb085072c79ea6a8027 Bisecting: 53 revisions left to test after this (roughly 6 steps) [6d26a149f5483acdc8a9a7a8fcf5e737a324a2b6] mm: shmem: remove 'fadvise()' comments testing commit 6d26a149f5483acdc8a9a7a8fcf5e737a324a2b6 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 91897251639f32976f9801f8079f1fc2510931a6f1c49dcefa85b1ec03c1fda5 all runs: OK false negative chance: 0.000 # git bisect good 6d26a149f5483acdc8a9a7a8fcf5e737a324a2b6 Bisecting: 26 revisions left to test after this (roughly 5 steps) [937582ee8e8d227c30ec147629a0179131feaa80] mm/mremap: correctly handle partial mremap() of VMA starting at 0 testing commit 937582ee8e8d227c30ec147629a0179131feaa80 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 249e0c0bfb7bcaafd95c0223d4c778996183fa6666371d05a94ee37a39ea8d40 all runs: OK false negative chance: 0.000 # git bisect good 937582ee8e8d227c30ec147629a0179131feaa80 Bisecting: 13 revisions left to test after this (roughly 4 steps) [405c4ef769c7c5e83e3556b48a190fe1afe82425] mm/rmap: pass dst_vma to folio_dup_file_rmap_pte() and friends testing commit 405c4ef769c7c5e83e3556b48a190fe1afe82425 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 14553cb9938e4ac3dc1639757287940a6e0639969fbd701970e64675213b28dd all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in mremap representative crash: BUG: unable to handle kernel NULL pointer dereference in mremap, types: [UNKNOWN] # git bisect bad 405c4ef769c7c5e83e3556b48a190fe1afe82425 Bisecting: 6 revisions left to test after this (roughly 3 steps) [664dc4da2694fa56e49dc3e4a041bcf7608a060b] mm/mremap: thread state through move page table operation testing commit 664dc4da2694fa56e49dc3e4a041bcf7608a060b gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 94f1fed8d3b015fad95e364c721e333d3800bcde2b90cec865b36b3af5c88e88 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in mremap representative crash: BUG: unable to handle kernel NULL pointer dereference in mremap, types: [UNKNOWN] # git bisect bad 664dc4da2694fa56e49dc3e4a041bcf7608a060b Bisecting: 2 revisions left to test after this (roughly 2 steps) [d5c8aec0542e2d79b64de9089b88fabdebe05c1e] mm/mremap: initial refactor of move_vma() testing commit d5c8aec0542e2d79b64de9089b88fabdebe05c1e gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c2c98cde0eb083628af8b1466d77d7d5196c4e4baead25e13e6bc648ada193fd all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in mremap representative crash: BUG: unable to handle kernel NULL pointer dereference in mremap, types: [UNKNOWN] # git bisect bad d5c8aec0542e2d79b64de9089b88fabdebe05c1e Bisecting: 0 revisions left to test after this (roughly 1 step) [221bf5cac5c2f3b9d8a07f4b2738225a59962945] mm/mremap: introduce and use vma_remap_struct threaded state testing commit 221bf5cac5c2f3b9d8a07f4b2738225a59962945 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c74c8ac3804b7c76b2d88387bcaf122324274056b3c1d5c2e876acf1f2f0e3ec run #0: ignore: lost connection to test machine 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 good 221bf5cac5c2f3b9d8a07f4b2738225a59962945 d5c8aec0542e2d79b64de9089b88fabdebe05c1e is the first bad commit commit d5c8aec0542e2d79b64de9089b88fabdebe05c1e Author: Lorenzo Stoakes Date: Mon Mar 10 20:50:37 2025 +0000 mm/mremap: initial refactor of move_vma() Update move_vma() to use the threaded VRM object, de-duplicate code and separate into smaller functions to aid readability and debug-ability. This in turn allows further simplification of expand_vma() as we can simply thread VRM through the function. We also take the opportunity to abstract the account charging page count into the VRM in order that we can correctly thread this through the operation. We additionally do the same for tracking mm statistics - exec_vm, stack_vm, data_vm, and locked_vm. As part of this change, we slightly modify when locked pages statistics are counted for in mm_struct statistics. However this should cause no issues, as there is no chance of underflow, nor will any rlimit failures occur as a result. This is an intermediate step before a further refactoring of move_vma() in order to aid review. Link: https://lkml.kernel.org/r/ab611d6efae11bddab2db2b8bb3925b1d1954c7d.1741639347.git.lorenzo.stoakes@oracle.com Signed-off-by: Lorenzo Stoakes Reviewed-by: Liam R. Howlett Reviewed-by: Vlastimil Babka Cc: Harry Yoo Signed-off-by: Andrew Morton mm/mremap.c | 186 +++++++++++++++++++++++++++++++++++++++--------------------- 1 file changed, 122 insertions(+), 64 deletions(-) accumulated error probability: 0.00 culprit signature: c2c98cde0eb083628af8b1466d77d7d5196c4e4baead25e13e6bc648ada193fd parent signature: c74c8ac3804b7c76b2d88387bcaf122324274056b3c1d5c2e876acf1f2f0e3ec revisions tested: 20, total time: 8h45m54.317821061s (build: 6h25m28.950761039s, test: 1h55m32.349911681s) first bad commit: d5c8aec0542e2d79b64de9089b88fabdebe05c1e mm/mremap: initial refactor of move_vma() recipients (to): ["akpm@linux-foundation.org" "liam.howlett@oracle.com" "lorenzo.stoakes@oracle.com" "vbabka@suse.cz"] recipients (cc): [] crash: BUG: unable to handle kernel NULL pointer dereference in mremap RSP: 002b:00007fb974a6c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000019 RAX: ffffffffffffffda RBX: 00007fb973da5fa0 RCX: 00007fb973b8d169 RDX: 0000000000003000 RSI: 0000000000001000 RDI: 0000200000ffc000 RBP: 00007fb974a6c090 R08: 0000200000ffa000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 00007fb973da5fa0 R15: 00007fffdb04e728 BUG: kernel NULL pointer dereference, address: 0000000000000022 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 10ef99067 P4D 10ef99067 PUD 0 Oops: Oops: 0000 [#1] PREEMPT SMP NOPTI CPU: 1 UID: 0 PID: 3530 Comm: syz.3.16 Not tainted 6.14.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:vrm_uncharge mm/mremap.c:857 [inline] RIP: 0010:expand_vma_in_place mm/mremap.c:1341 [inline] RIP: 0010:expand_vma mm/mremap.c:1396 [inline] RIP: 0010:mremap_at mm/mremap.c:1457 [inline] RIP: 0010:do_mremap mm/mremap.c:1502 [inline] RIP: 0010:__do_sys_mremap+0x7f2/0x840 mm/mremap.c:1559 Code: 1b 4c 8b 2c 24 4d 89 ec e9 6f fb ff ff 4c 01 bd 68 02 00 00 c6 84 24 d0 00 00 00 01 48 8b 04 24 48 89 84 24 a0 00 00 00 eb d7 04 25 22 00 00 00 10 74 27 48 8b b4 24 e0 00 00 00 8b 15 1a a4 RSP: 0018:ffffc90001d43e00 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff888106bf5c80 RCX: 0000000000000027 RDX: 0000000000000000 RSI: ffffffff832682f5 RDI: 0000000000000000 RBP: ffff88810b738000 R08: 0000000000000000 R09: 0000000000000001 R10: ffffc90001d43808 R11: ffffffff837de0a8 R12: 0000000000000000 R13: 0000000000000000 R14: ffff888106bf5df0 R15: ffffc90001d43e80 FS: 00007fb974a6c6c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000022 CR3: 0000000109796000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x6d/0x170 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb973b8d169 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fb974a6c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000019 RAX: ffffffffffffffda RBX: 00007fb973da5fa0 RCX: 00007fb973b8d169 RDX: 0000000000003000 RSI: 0000000000001000 RDI: 0000200000ffc000 RBP: 00007fb974a6c090 R08: 0000200000ffa000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 00007fb973da5fa0 R15: 00007fffdb04e728 Modules linked in: CR2: 0000000000000022 ---[ end trace 0000000000000000 ]--- RIP: 0010:vrm_uncharge mm/mremap.c:857 [inline] RIP: 0010:expand_vma_in_place mm/mremap.c:1341 [inline] RIP: 0010:expand_vma mm/mremap.c:1396 [inline] RIP: 0010:mremap_at mm/mremap.c:1457 [inline] RIP: 0010:do_mremap mm/mremap.c:1502 [inline] RIP: 0010:__do_sys_mremap+0x7f2/0x840 mm/mremap.c:1559 Code: 1b 4c 8b 2c 24 4d 89 ec e9 6f fb ff ff 4c 01 bd 68 02 00 00 c6 84 24 d0 00 00 00 01 48 8b 04 24 48 89 84 24 a0 00 00 00 eb d7 04 25 22 00 00 00 10 74 27 48 8b b4 24 e0 00 00 00 8b 15 1a a4 RSP: 0018:ffffc90001d43e00 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff888106bf5c80 RCX: 0000000000000027 RDX: 0000000000000000 RSI: ffffffff832682f5 RDI: 0000000000000000 RBP: ffff88810b738000 R08: 0000000000000000 R09: 0000000000000001 R10: ffffc90001d43808 R11: ffffffff837de0a8 R12: 0000000000000000 R13: 0000000000000000 R14: ffff888106bf5df0 R15: ffffc90001d43e80 FS: 00007fb974a6c6c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000022 CR3: 0000000109796000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 1b 4c 8b 2c sbb 0x2c(%rbx,%rcx,4),%ecx 4: 24 4d and $0x4d,%al 6: 89 ec mov %ebp,%esp 8: e9 6f fb ff ff jmp 0xfffffb7c d: 4c 01 bd 68 02 00 00 add %r15,0x268(%rbp) 14: c6 84 24 d0 00 00 00 movb $0x1,0xd0(%rsp) 1b: 01 1c: 48 8b 04 24 mov (%rsp),%rax 20: 48 89 84 24 a0 00 00 mov %rax,0xa0(%rsp) 27: 00 28: eb d7 jmp 0x1 * 2a: f6 04 25 22 00 00 00 testb $0x10,0x22 <-- trapping instruction 31: 10 32: 74 27 je 0x5b 34: 48 8b b4 24 e0 00 00 mov 0xe0(%rsp),%rsi 3b: 00 3c: 8b .byte 0x8b 3d: 15 .byte 0x15 3e: 1a .byte 0x1a 3f: a4 movsb %ds:(%rsi),%es:(%rdi)