ci starts bisection 2025-05-14 06:30:11.242867115 +0000 UTC m=+55018.779067523 bisecting fixing commit since 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: 742fb613ab1d189d263a817ab186b925821b02340398f3508abbedd9a7d876ed all runs: 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 [ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN LOCKDEP], 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: 110450deeeb9b7719e17491d0ed2c7e04d3800262d2107d417195e94c2adbe7b 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 [BUG KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed kconfig minimization: base=4081 full=8323 leaves diff=2130 split chunks (needed=false): <2130> split chunk #0 of len 2130 into 5 parts testing without sub-chunk 1/5 disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN LOCKDEP], 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: 054c9198ef257815779319244ebce538b09e92b86edfb32d52b3c97451e8334a 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 [BUG KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], 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 [ATOMIC_SLEEP HANG LEAK UBSAN BUG KASAN LOCKDEP], 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: 13033ca2640686ee738ab9379f7b9052638d400b81456dd4136000791de80766 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: 72b1fbbbed4cd87dd93d81efe6c51fe4d1eb5f8a994d6459b84949f8d74281a2 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 [HANG LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], 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: aaca52d1a47194113829072e852c112b5ad797201d65281380a280ccc01d111b 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 426 configs; suspects: [6LOWPAN ARCH_ENABLE_MEMORY_HOTREMOVE ASUS_WMI CHARGER_BQ24190 CMA COMMON_CLK DAX DLM DRM DRM_BRIDGE DRM_DISPLAY_DP_HELPER DRM_DISPLAY_DSC_HELPER DRM_DISPLAY_HDCP_HELPER 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 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 [KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed testing current HEAD 9f35e33144ae5377d6a8de86dd3bd4d995c6ac65 testing commit 9f35e33144ae5377d6a8de86dd3bd4d995c6ac65 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: d544f2d6a5c9807f22c2e51a35795c9ebb2c29bc4cb1985d8b08b8f5be45aa17 all runs: OK false negative chance: 0.000 # git bisect start 9f35e33144ae5377d6a8de86dd3bd4d995c6ac65 a2cc6ff5ec8f91bc463fd3b0c26b61166a07eb11 Bisecting: 1266 revisions left to test after this (roughly 10 steps) [cc0dec3f659d19805fcaf8822204137c9f27a912] Merge branch 'net-stmmac-fix-timestamp-snapshots-on-dwmac1000' determine whether the revision contains the guilty commit revision a2cc6ff5ec8f91bc463fd3b0c26b61166a07eb11 crashed and is reachable testing commit cc0dec3f659d19805fcaf8822204137c9f27a912 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 3310c94c140d89872334f876b0ccafb49c510a1dbb5659e1711e60a82dfefb76 all runs: OK false negative chance: 0.000 # git bisect bad cc0dec3f659d19805fcaf8822204137c9f27a912 Bisecting: 617 revisions left to test after this (roughly 9 steps) [e6c4618422a25cb266bf752040eb509865caeb0e] MAINTAINERS: update my email address determine whether the revision contains the guilty commit revision a2cc6ff5ec8f91bc463fd3b0c26b61166a07eb11 crashed and is reachable testing commit e6c4618422a25cb266bf752040eb509865caeb0e gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7d9d6c9e934681723b63dc706feb9de2d04b37da9c6a0e1ed0a7e3c341bc820f all runs: OK false negative chance: 0.000 # git bisect bad e6c4618422a25cb266bf752040eb509865caeb0e Bisecting: 279 revisions left to test after this (roughly 8 steps) [61f96e684edd28ca40555ec49ea1555df31ba619] Merge tag 'net-6.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net determine whether the revision contains the guilty commit revision a2cc6ff5ec8f91bc463fd3b0c26b61166a07eb11 crashed and is reachable testing commit 61f96e684edd28ca40555ec49ea1555df31ba619 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 2a9530d40ec751c433c8c4f215f7f8250024b06226dcee60049dc248b14ef32f all runs: OK false negative chance: 0.000 # git bisect bad 61f96e684edd28ca40555ec49ea1555df31ba619 Bisecting: 187 revisions left to test after this (roughly 7 steps) [c0dbd11ada2c94edc337a5f6665cbaa6079ff785] fs: actually hold the namespace semaphore determine whether the revision contains the guilty commit revision a2cc6ff5ec8f91bc463fd3b0c26b61166a07eb11 crashed and is reachable testing commit c0dbd11ada2c94edc337a5f6665cbaa6079ff785 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c0319689b3353ce27b910aa96e802fb5b3cabfc1d1cfd02b56f1d61a519e8ed7 all runs: OK false negative chance: 0.000 # git bisect bad c0dbd11ada2c94edc337a5f6665cbaa6079ff785 Bisecting: 77 revisions left to test after this (roughly 6 steps) [e8b471285262d1561feb2eb266aab6ebe7094124] Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rmk/linux determine whether the revision contains the guilty commit revision a2cc6ff5ec8f91bc463fd3b0c26b61166a07eb11 crashed and is reachable testing commit e8b471285262d1561feb2eb266aab6ebe7094124 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 85e9b9db654b217603bbb0be2eb0beb9ce8e8dae23bc406f5d83819e53dc6489 all runs: OK false negative chance: 0.000 # git bisect bad e8b471285262d1561feb2eb266aab6ebe7094124 Bisecting: 41 revisions left to test after this (roughly 5 steps) [e20706d5385b10a6f6a2fe5ad6b1333dad2d1416] mseal sysmap: add arch-support txt determine whether the revision contains the guilty commit checking the merge base 25601e85441dd91cf7973b002f27af4c5b8691ea no existing result, test the revision testing commit 25601e85441dd91cf7973b002f27af4c5b8691ea gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 6bdc534f7e414aaa40df0888e75d003305537960a293cd5758977d11fe3b13a6 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] testing commit e20706d5385b10a6f6a2fe5ad6b1333dad2d1416 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 0e4ad403ac8fa6efd3051b582c372973c4a2c31e73bf2fbb6610ec553319d286 all runs: OK false negative chance: 0.000 # git bisect bad e20706d5385b10a6f6a2fe5ad6b1333dad2d1416 Bisecting: 15 revisions left to test after this (roughly 4 steps) [1b3d3e9f4a32b06ca73b084aa526a352318c74ac] microblaze/mm: put mm_cmdline_setup() in .init.text section determine whether the revision contains the guilty commit revision 25601e85441dd91cf7973b002f27af4c5b8691ea crashed and is reachable testing commit 1b3d3e9f4a32b06ca73b084aa526a352318c74ac gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7db44336740b653956b99ec6396ffc30ce526b17623ceef809a1dd2d44de985b all runs: OK false negative chance: 0.000 # git bisect bad 1b3d3e9f4a32b06ca73b084aa526a352318c74ac Bisecting: 7 revisions left to test after this (roughly 3 steps) [2ebc3b68ac400444d8cc2ec1f4460c37aa7d28da] mm/mm_init: init holes in the end of the memory map for FLATMEM determine whether the revision contains the guilty commit revision 25601e85441dd91cf7973b002f27af4c5b8691ea crashed and is reachable testing commit 2ebc3b68ac400444d8cc2ec1f4460c37aa7d28da gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: d328d75ddf0ba19c91847cfae7d14dff8cd9dcfd728ecab68a3eda2979898af3 all runs: OK false negative chance: 0.000 # git bisect bad 2ebc3b68ac400444d8cc2ec1f4460c37aa7d28da Bisecting: 3 revisions left to test after this (roughly 2 steps) [7fa46cdfffd29459f9ebf6ed891a4c721db06a33] mm/kasan: use SLAB_NO_MERGE flag instead of an empty constructor determine whether the revision contains the guilty commit revision 25601e85441dd91cf7973b002f27af4c5b8691ea crashed and is reachable testing commit 7fa46cdfffd29459f9ebf6ed891a4c721db06a33 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 80619b84ccbb3211cd2a9c2ce77cd518763f6f841889316a7f7cfe72a55ef626 all runs: OK false negative chance: 0.000 # git bisect bad 7fa46cdfffd29459f9ebf6ed891a4c721db06a33 Bisecting: 0 revisions left to test after this (roughly 1 step) [7a95a05f15d570e6087fea59280fe267fe809100] mm: page_alloc: fix defrag_mode's retry & OOM path determine whether the revision contains the guilty commit revision 25601e85441dd91cf7973b002f27af4c5b8691ea crashed and is reachable testing commit 7a95a05f15d570e6087fea59280fe267fe809100 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7e9d861abfc8c8f3c53994435f0dd1fef2bf819c32fc409e22a63af1a002b665 all runs: OK false negative chance: 0.000 # git bisect bad 7a95a05f15d570e6087fea59280fe267fe809100 Bisecting: 0 revisions left to test after this (roughly 0 steps) [36eed5400805b294f1df39b0e3ebc5b7971b3c16] mm/mremap: do not set vrm->vma NULL immediately prior to checking it determine whether the revision contains the guilty commit revision 25601e85441dd91cf7973b002f27af4c5b8691ea crashed and is reachable testing commit 36eed5400805b294f1df39b0e3ebc5b7971b3c16 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: cdd79a57076a35e3dbe16d24a347becb1705292789c92cf2ef93a4495c5d0ca0 all runs: OK false negative chance: 0.000 # git bisect bad 36eed5400805b294f1df39b0e3ebc5b7971b3c16 36eed5400805b294f1df39b0e3ebc5b7971b3c16 is the first bad commit commit 36eed5400805b294f1df39b0e3ebc5b7971b3c16 Author: Lorenzo Stoakes Date: Sun Mar 30 17:20:48 2025 +0100 mm/mremap: do not set vrm->vma NULL immediately prior to checking it This seems rather unwise. If we cannot merge, extend, then we need to recall the original VMA to see if we need to uncharge. If we do need to, do so. Link: https://lkml.kernel.org/r/b2fb6b9c-376d-4e9b-905e-26d847fd3865@lucifer.local Fixes: d5c8aec0542e ("mm/mremap: initial refactor of move_vma()") Signed-off-by: Lorenzo Stoakes Reported-=by: "Lai, Yi" Closes: https://lore.kernel.org/linux-mm/Z+lcvEIHMLiKVR1i@ly-workstation/ Cc: Liam R. Howlett Cc: Vlastimil Babka Cc: Harry Yoo Signed-off-by: Andrew Morton mm/mremap.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) accumulated error probability: 0.00 culprit signature: cdd79a57076a35e3dbe16d24a347becb1705292789c92cf2ef93a4495c5d0ca0 parent signature: 6bdc534f7e414aaa40df0888e75d003305537960a293cd5758977d11fe3b13a6 revisions tested: 19, total time: 7h27m36.501808374s (build: 4h37m3.69629448s, test: 2h24m40.564383075s) first good commit: 36eed5400805b294f1df39b0e3ebc5b7971b3c16 mm/mremap: do not set vrm->vma NULL immediately prior to checking it recipients (to): ["Liam.Howlett@oracle.com" "akpm@linux-foundation.org" "akpm@linux-foundation.org" "linux-mm@kvack.org" "lorenzo.stoakes@oracle.com" "lorenzo.stoakes@oracle.com"] recipients (cc): ["jannh@google.com" "linux-kernel@vger.kernel.org" "pfalcato@suse.de" "vbabka@suse.cz"]