ci starts bisection 2025-10-20 01:10:27.67998466 +0000 UTC m=+179983.129772419 bisecting cause commit starting from f406055cb18c6e299c4a783fc1effeb16be41803 building syzkaller on 1c8c8cd830af4deee250ad11f1613d1d9a62ca0b ensuring issue is reproducible on original commit f406055cb18c6e299c4a783fc1effeb16be41803 testing commit f406055cb18c6e299c4a783fc1effeb16be41803 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 2763857e25d37fb31c0ceb499c59ae9fce24fe11a8d1448161938fe1f43686a3 all runs: crashed: KASAN: slab-out-of-bounds Read in change_page_attr_set_clr representative crash: KASAN: slab-out-of-bounds Read in change_page_attr_set_clr, types: [KASAN-READ] check whether we can drop unnecessary instrumentation disabling configs for [hang memleak ubsan bug_or_warning locking atomic_sleep], they are not needed testing commit f406055cb18c6e299c4a783fc1effeb16be41803 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: d34cf32f54c187a2745f2e49b8214f39eaf16abf575323968302804601819bdb all runs: crashed: KASAN: slab-out-of-bounds Read in change_page_attr_set_clr representative crash: KASAN: slab-out-of-bounds Read in change_page_attr_set_clr, types: [KASAN-READ] the bug reproduces without the instrumentation disabling configs for [hang memleak ubsan bug_or_warning locking atomic_sleep], they are not needed kconfig minimization: base=4108 full=8370 leaves diff=2114 split chunks (needed=false): <2114> split chunk #0 of len 2114 into 5 parts testing without sub-chunk 1/5 disabling configs for [locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed testing commit f406055cb18c6e299c4a783fc1effeb16be41803 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 67b95bcd7773103ac861fb14107207d83a8755a3d9bd71a0d40f610145877b38 all runs: crashed: KASAN: slab-out-of-bounds Read in change_page_attr_set_clr representative crash: KASAN: slab-out-of-bounds Read in change_page_attr_set_clr, types: [KASAN-READ] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [bug_or_warning locking atomic_sleep hang memleak ubsan], they are not needed testing commit f406055cb18c6e299c4a783fc1effeb16be41803 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: cd17de5d18679442c4152ee04b395649947dda75fb22a4c50e0df2de2c48d655 all runs: OK false negative chance: 0.000 testing without sub-chunk 3/5 disabling configs for [hang memleak ubsan bug_or_warning locking atomic_sleep], they are not needed testing commit f406055cb18c6e299c4a783fc1effeb16be41803 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 804ae89c9fa36628400ea40f224167212a88b1ff5c55b7cab7ee65d4d3fa807c all runs: crashed: KASAN: slab-out-of-bounds Read in change_page_attr_set_clr representative crash: KASAN: slab-out-of-bounds Read in change_page_attr_set_clr, types: [KASAN-READ] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [hang memleak ubsan bug_or_warning locking atomic_sleep], they are not needed testing commit f406055cb18c6e299c4a783fc1effeb16be41803 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: d02f9e7b9409dd6f65ed2ff8dde4c602d6a414499f06d32043c880123b6dddc3 all runs: crashed: KASAN: slab-out-of-bounds Read in change_page_attr_set_clr representative crash: KASAN: slab-out-of-bounds Read in change_page_attr_set_clr, types: [KASAN-READ] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed testing commit f406055cb18c6e299c4a783fc1effeb16be41803 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 5a1f7767568799e50ec8fabf1e36ba1a1b285de30644c49153dd0a0ced02d310 all runs: crashed: KASAN: slab-out-of-bounds Read in change_page_attr_set_clr representative crash: KASAN: slab-out-of-bounds Read in change_page_attr_set_clr, types: [KASAN-READ] the chunk can be dropped minimized to 423 configs; suspects: [6LOWPAN ARCH_ENABLE_MEMORY_HOTREMOVE ASUS_WMI BLK_DEV_ZONED CHARGER_BQ24190 CMA COMMON_CLK DAX DLM DM_CRYPT DM_FLAKEY DM_INTEGRITY DM_MULTIPATH DM_MULTIPATH_QL DM_MULTIPATH_ST DM_PERSISTENT_DATA DM_RAID DM_SNAPSHOT DM_THIN_PROVISIONING DM_UEVENT DM_VERITY DM_VERITY_FEC DM_WRITECACHE DM_ZONED DRAGONRISE_FF DRM DRM_AUX_BRIDGE DRM_BOCHS DRM_BRIDGE DRM_CIRRUS_QEMU DRM_CLIENT DRM_CLIENT_DEFAULT_FBDEV DRM_CLIENT_LIB DRM_CLIENT_SELECTION DRM_CLIENT_SETUP DRM_DEBUG_MM DRM_DISPLAY_DP_AUX_BUS DRM_DISPLAY_DP_HELPER DRM_DISPLAY_HELPER DRM_FBDEV_EMULATION DRM_GEM_SHMEM_HELPER DRM_GM12U320 DRM_GUD DRM_KMS_HELPER DRM_PANEL DRM_PANEL_BRIDGE DRM_PANEL_EDP DRM_PANEL_ORIENTATION_QUIRKS DRM_SIMPLEDRM DRM_SYSFB_HELPER 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 EVM_EXTRA_SMACK_XATTRS EXFAT_FS EXPORTFS_BLOCK_OPS EXTCON EXTCON_INTEL_CHT_WC EXTCON_PTN5150 EXTCON_USBC_TUSB320 EXTENDED_MODVERSIONS 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_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 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 GROUP_SCHED_BANDWIDTH GTP GUEST_PERF_EVENTS HAS_LTO_CLANG 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_DRAGONRISE 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_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_MOCK_FILE 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_TARGET_NPT IP6_NF_TARGET_REJECT 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_FIB_TRIE_STATS IP_MROUTE_MULTIPLE_TABLES IP_NF_ARP_MANGLE IP_NF_MATCH_AH IP_NF_MATCH_ECN IP_NF_MATCH_RPFILTER IP_NF_MATCH_TTL IP_NF_TARGET_ECN IP_NF_TARGET_REJECT IP_NF_TARGET_SYNPROXY IP_ROUTE_CLASSID IP_SCTP IP_SET IP_SET_BITMAP_IP IP_SET_BITMAP_IPMAC 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 RADIO_ADAPTERS RADIO_SI4713 RAS RC_CORE REGULATOR RFKILL SND SOUND STAGING TRUSTED_KEYS TYPEC TYPEC_MUX_PI3USB30532 USB_LJCA USB_ROLES_INTEL_XHCI USB_ROLE_SWITCH VIDEO_DEV VIRTIO_FS WAN ZONE_DEVICE] disabling configs for [ubsan bug_or_warning locking atomic_sleep hang memleak], they are not needed picked [v6.17 v6.16 v6.15 v6.13 v6.11 v6.9 v6.7 v6.5 v6.2 v5.19 v5.16 v5.13 v5.10 v5.7 v5.4 v5.1 v4.19] out of 40 release tags testing release v6.17 testing commit e5f0a698b34ed76002dc5cff3804a61c80233a7a gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: ff088832b6bf63db98fd88ee34177c3a5d94692f99e180152a00da88c1626ee2 all runs: OK false negative chance: 0.000 # git bisect start f406055cb18c6e299c4a783fc1effeb16be41803 e5f0a698b34ed76002dc5cff3804a61c80233a7a Bisecting: 6693 revisions left to test after this (roughly 13 steps) [58809f614e0e3f4e12b489bddf680bfeb31c0a20] Merge tag 'drm-next-2025-10-01' of https://gitlab.freedesktop.org/drm/kernel testing commit 58809f614e0e3f4e12b489bddf680bfeb31c0a20 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 046e6f75a8fb176987a2dedf0218b8ad7f89caa4a2a675dd551741ff570676b7 all runs: OK false negative chance: 0.000 # git bisect good 58809f614e0e3f4e12b489bddf680bfeb31c0a20 Bisecting: 3351 revisions left to test after this (roughly 12 steps) [2ccb4d203fe4bec72fb333ccc2feb71a462c188d] Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma testing commit 2ccb4d203fe4bec72fb333ccc2feb71a462c188d gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 49dae2c7118ffac3cf2ad4fb55eff70381347fa348d025401cbbdf8e3cfd6f29 all runs: OK false negative chance: 0.000 # git bisect good 2ccb4d203fe4bec72fb333ccc2feb71a462c188d Bisecting: 1714 revisions left to test after this (roughly 11 steps) [e4c0fdd5af4c590ca07880b97e286c6532437658] Merge tag 'dmaengine-6.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine testing commit e4c0fdd5af4c590ca07880b97e286c6532437658 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 59fde313cbdeaa609f5ce6c3b362b7ee29fca64b72a2b21c09e1a33807a71b81 all runs: crashed: KASAN: slab-out-of-bounds Read in change_page_attr_set_clr representative crash: KASAN: slab-out-of-bounds Read in change_page_attr_set_clr, types: [KASAN-READ] # git bisect bad e4c0fdd5af4c590ca07880b97e286c6532437658 Bisecting: 804 revisions left to test after this (roughly 10 steps) [c35f902cb31dad551dcc1c79540a58145cb19479] Merge tag 'rproc-v6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/remoteproc/linux testing commit c35f902cb31dad551dcc1c79540a58145cb19479 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 2ed87064c02083094ea253dbd41a21ae19d63c28e1e79af9d962d9da4ec857f7 all runs: crashed: KASAN: slab-out-of-bounds Read in change_page_attr_set_clr representative crash: KASAN: slab-out-of-bounds Read in change_page_attr_set_clr, types: [KASAN-READ] # git bisect bad c35f902cb31dad551dcc1c79540a58145cb19479 Bisecting: 404 revisions left to test after this (roughly 9 steps) [f3826aa9962b4572d01083c84ac0f8345f121168] Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm testing commit f3826aa9962b4572d01083c84ac0f8345f121168 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 86c34d801bc2c00fb9c17135024413826a6014f6db166f36b65ee0edbb98b5c3 all runs: OK false negative chance: 0.000 # git bisect good f3826aa9962b4572d01083c84ac0f8345f121168 Bisecting: 171 revisions left to test after this (roughly 8 steps) [908057d185a41560a55890afa69c9676fc63e55c] Merge tag 'v6.18-p1' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 testing commit 908057d185a41560a55890afa69c9676fc63e55c gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 6d84dfb4f127fbe5c09ba3a12dfcd6fa25b221e02217f816fcd925d858f4cc88 all runs: crashed: KASAN: slab-out-of-bounds Read in change_page_attr_set_clr representative crash: KASAN: slab-out-of-bounds Read in change_page_attr_set_clr, types: [KASAN-READ] # git bisect bad 908057d185a41560a55890afa69c9676fc63e55c Bisecting: 107 revisions left to test after this (roughly 7 steps) [67da125e30ab17b5b8874eb32882e81cdec17ec8] Merge tag 'rcu.2025.09.26a' of git://git.kernel.org/pub/scm/linux/kernel/git/rcu/linux testing commit 67da125e30ab17b5b8874eb32882e81cdec17ec8 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: e5e43d4e457f1c4a1854cb55eb523f6d9ad53b4db2c020473eaa5bd11a958694 all runs: crashed: KASAN: slab-out-of-bounds Read in change_page_attr_set_clr representative crash: KASAN: slab-out-of-bounds Read in change_page_attr_set_clr, types: [KASAN-READ] # git bisect bad 67da125e30ab17b5b8874eb32882e81cdec17ec8 Bisecting: 70 revisions left to test after this (roughly 6 steps) [86bcf7be1e26f2d7277df90857d93ce0ebc11370] Merge tag 'riscv-for-linus-6.18-mw2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux testing commit 86bcf7be1e26f2d7277df90857d93ce0ebc11370 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 6941d17ec1eaa727bf842f7f3c29b1d1f8599a91f688b8e8945f88d29d6e1114 all runs: crashed: KASAN: slab-out-of-bounds Read in change_page_attr_set_clr representative crash: KASAN: slab-out-of-bounds Read in change_page_attr_set_clr, types: [KASAN-READ] # git bisect bad 86bcf7be1e26f2d7277df90857d93ce0ebc11370 Bisecting: 26 revisions left to test after this (roughly 5 steps) [7c738cb4ca678e70c4583ab35587f30bfae823e5] Merge tag 'x86_entry_for_6.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip testing commit 7c738cb4ca678e70c4583ab35587f30bfae823e5 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 50ae34843a94dd1613cd7d55e2f671ae6ca7f3e40aae1619d1b8f1abd3f74bce all runs: crashed: KASAN: slab-out-of-bounds Read in change_page_attr_set_clr representative crash: KASAN: slab-out-of-bounds Read in change_page_attr_set_clr, types: [KASAN-READ] # git bisect bad 7c738cb4ca678e70c4583ab35587f30bfae823e5 Bisecting: 13 revisions left to test after this (roughly 4 steps) [61221d07e815008ba758995d79fd442b5217f51a] KVM/TDX: Explicitly do WBINVD when no more TDX SEAMCALLs testing commit 61221d07e815008ba758995d79fd442b5217f51a gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 415588634884d28cbb01bf606ba34cb0f26c8d6f0ebf0c7987dfe2d833a94336 all runs: OK false negative chance: 0.000 # git bisect good 61221d07e815008ba758995d79fd442b5217f51a Bisecting: 6 revisions left to test after this (roughly 3 steps) [5b7ce9385441cfce92e6b7324216cc38614f86ef] Merge tag 'kgdb-6.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/danielt/linux testing commit 5b7ce9385441cfce92e6b7324216cc38614f86ef gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 447933393713a1373909e0738db83473fdadb37eacc585df60fc15884bcd9732 all runs: OK false negative chance: 0.000 # git bisect good 5b7ce9385441cfce92e6b7324216cc38614f86ef Bisecting: 2 revisions left to test after this (roughly 2 steps) [be786eba12c87dc04ad8eac408dc17369c04ad47] Merge tag 'x86_mm_for_6.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip testing commit be786eba12c87dc04ad8eac408dc17369c04ad47 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: ffa74231c8287e1cea8d69a7e367370a432213988ff342c7803607635aa07450 all runs: crashed: KASAN: slab-out-of-bounds Read in change_page_attr_set_clr representative crash: KASAN: slab-out-of-bounds Read in change_page_attr_set_clr, types: [KASAN-READ] # git bisect bad be786eba12c87dc04ad8eac408dc17369c04ad47 Bisecting: 1 revision left to test after this (roughly 1 step) [50ac57c3b156e893e34310f0be340a130f36f6db] Merge tag 'x86_tdx_for_6.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip testing commit 50ac57c3b156e893e34310f0be340a130f36f6db gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 3add6d90ca3bcf0727b7cda08a95c37e8a112e4fe685bcaffe5b1b31dc2a93c4 all runs: OK false negative chance: 0.000 # git bisect good 50ac57c3b156e893e34310f0be340a130f36f6db Bisecting: 0 revisions left to test after this (roughly 0 steps) [86e6815b316ec0ea8c4bb3c16a033219a52b6060] x86/mm: Change cpa_flush() to call flush_kernel_range() directly testing commit 86e6815b316ec0ea8c4bb3c16a033219a52b6060 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: a5b9d6459099de5984c0bb37435913c56cbadef79132d747f49e02f0d4d46140 all runs: crashed: KASAN: slab-out-of-bounds Read in change_page_attr_set_clr representative crash: KASAN: slab-out-of-bounds Read in change_page_attr_set_clr, types: [KASAN-READ] # git bisect bad 86e6815b316ec0ea8c4bb3c16a033219a52b6060 86e6815b316ec0ea8c4bb3c16a033219a52b6060 is the first bad commit commit 86e6815b316ec0ea8c4bb3c16a033219a52b6060 Author: Yu-cheng Yu Date: Fri Jun 6 13:10:35 2025 -0400 x86/mm: Change cpa_flush() to call flush_kernel_range() directly The function cpa_flush() calls __flush_tlb_one_kernel() and flush_tlb_all(). Replacing that with a call to flush_tlb_kernel_range() allows cpa_flush() to make use of INVLPGB or RAR without any additional changes. Initialize invlpgb_count_max to 1, since flush_tlb_kernel_range() can now be called before invlpgb_count_max has been initialized to the value read from CPUID. [riel: remove now unused __cpa_flush_tlb] Signed-off-by: Yu-cheng Yu Signed-off-by: Rik van Riel Signed-off-by: Dave Hansen Acked-by: Dave Hansen Link: https://lore.kernel.org/all/20250606171112.4013261-4-riel%40surriel.com arch/x86/mm/pat/set_memory.c | 20 +++++++------------- 1 file changed, 7 insertions(+), 13 deletions(-) accumulated error probability: 0.00 parent commit c17b750b3ad9f45f2b6f7e6f7f4679844244f0b9 wasn't tested testing commit c17b750b3ad9f45f2b6f7e6f7f4679844244f0b9 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 29498951198fc5738ae9aef4b5759da5956d3cdf4d15899dbfcbf796104e8924 culprit signature: a5b9d6459099de5984c0bb37435913c56cbadef79132d747f49e02f0d4d46140 parent signature: 29498951198fc5738ae9aef4b5759da5956d3cdf4d15899dbfcbf796104e8924 revisions tested: 22, total time: 8h5m3.289921091s (build: 5h5m28.926219045s, test: 2h24m14.801498736s) first bad commit: 86e6815b316ec0ea8c4bb3c16a033219a52b6060 x86/mm: Change cpa_flush() to call flush_kernel_range() directly recipients (to): ["dave.hansen@linux.intel.com" "riel@surriel.com" "yu-cheng.yu@intel.com"] recipients (cc): [] crash: KASAN: slab-out-of-bounds Read in change_page_attr_set_clr ================================================================== BUG: KASAN: slab-out-of-bounds in __cpa_addr arch/x86/mm/pat/set_memory.c:309 [inline] BUG: KASAN: slab-out-of-bounds in cpa_flush arch/x86/mm/pat/set_memory.c:449 [inline] BUG: KASAN: slab-out-of-bounds in change_page_attr_set_clr+0x61a/0xe20 arch/x86/mm/pat/set_memory.c:2115 Read of size 8 at addr ffff88810df74ef8 by task syz.3.17/3565 CPU: 1 UID: 0 PID: 3565 Comm: syz.3.17 Not tainted syzkaller #0 PREEMPT(none) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 Call Trace: dump_stack_lvl+0xf4/0x170 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xca/0x240 mm/kasan/report.c:482 kasan_report+0x118/0x150 mm/kasan/report.c:595 __cpa_addr arch/x86/mm/pat/set_memory.c:309 [inline] cpa_flush arch/x86/mm/pat/set_memory.c:449 [inline] change_page_attr_set_clr+0x61a/0xe20 arch/x86/mm/pat/set_memory.c:2115 cpa_set_pages_array arch/x86/mm/pat/set_memory.c:2137 [inline] _set_pages_array+0xe3/0x1c0 arch/x86/mm/pat/set_memory.c:2521 drm_gem_shmem_get_pages_locked+0x20c/0x350 drivers/gpu/drm/drm_gem_shmem_helper.c:214 drm_gem_shmem_mmap+0x12b/0x360 drivers/gpu/drm/drm_gem_shmem_helper.c:646 drm_gem_mmap_obj+0x14d/0x380 drivers/gpu/drm/drm_gem.c:1139 drm_gem_mmap+0x30b/0x520 drivers/gpu/drm/drm_gem.c:1217 vfs_mmap include/linux/fs.h:2289 [inline] mmap_file mm/internal.h:167 [inline] __mmap_new_file_vma mm/vma.c:2413 [inline] __mmap_new_vma mm/vma.c:2476 [inline] __mmap_region mm/vma.c:2669 [inline] mmap_region+0x14b1/0x1c50 mm/vma.c:2739 do_mmap+0x930/0xc30 mm/mmap.c:558 vm_mmap_pgoff+0x2a2/0x420 mm/util.c:580 ksys_mmap_pgoff+0x2be/0x3f0 mm/mmap.c:604 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x8f/0x250 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f3d8169efc9 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:00007f3d81507038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 00007f3d818f5fa0 RCX: 00007f3d8169efc9 RDX: 0000000000000004 RSI: 0000000000004000 RDI: 0000200000001000 RBP: 00007f3d81721f91 R08: 0000000000000003 R09: 0000000100000000 R10: 0000000000000011 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f3d818f6038 R14: 00007f3d818f5fa0 R15: 00007ffddb583338 Allocated by task 3565: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:388 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:405 kasan_kmalloc include/linux/kasan.h:260 [inline] __do_kmalloc_node mm/slub.c:4365 [inline] __kvmalloc_node_noprof+0x2e5/0x5c0 mm/slub.c:5052 kvmalloc_array_node_noprof include/linux/slab.h:1065 [inline] drm_gem_get_pages+0x12b/0x7b0 drivers/gpu/drm/drm_gem.c:640 drm_gem_shmem_get_pages_locked+0x14e/0x350 drivers/gpu/drm/drm_gem_shmem_helper.c:200 drm_gem_shmem_mmap+0x12b/0x360 drivers/gpu/drm/drm_gem_shmem_helper.c:646 drm_gem_mmap_obj+0x14d/0x380 drivers/gpu/drm/drm_gem.c:1139 drm_gem_mmap+0x30b/0x520 drivers/gpu/drm/drm_gem.c:1217 vfs_mmap include/linux/fs.h:2289 [inline] mmap_file mm/internal.h:167 [inline] __mmap_new_file_vma mm/vma.c:2413 [inline] __mmap_new_vma mm/vma.c:2476 [inline] __mmap_region mm/vma.c:2669 [inline] mmap_region+0x14b1/0x1c50 mm/vma.c:2739 do_mmap+0x930/0xc30 mm/mmap.c:558 vm_mmap_pgoff+0x2a2/0x420 mm/util.c:580 ksys_mmap_pgoff+0x2be/0x3f0 mm/mmap.c:604 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x8f/0x250 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88810df74e00 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 0 bytes to the right of allocated 248-byte region [ffff88810df74e00, ffff88810df74ef8) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10df74 head: order:1 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0x100000000000040(head|node=0|zone=2) page_type: f5(slab) raw: 0100000000000040 ffff888100041b40 dead000000000100 dead000000000122 raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000 head: 0100000000000040 ffff888100041b40 dead000000000100 dead000000000122 head: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000 head: 0100000000000001 ffffea000437dd01 00000000ffffffff 00000000ffffffff head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000002 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 1, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 4901251468, free_ts 0 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x168/0x1a0 mm/page_alloc.c:1851 prep_new_page mm/page_alloc.c:1859 [inline] get_page_from_freelist+0x3719/0x3870 mm/page_alloc.c:3858 __alloc_frozen_pages_noprof+0x26b/0x460 mm/page_alloc.c:5148 alloc_pages_mpol+0xcb/0x270 mm/mempolicy.c:2416 alloc_slab_page mm/slub.c:2487 [inline] allocate_slab+0x8a/0x320 mm/slub.c:2655 new_slab mm/slub.c:2709 [inline] ___slab_alloc+0x9c6/0x10a0 mm/slub.c:3891 __slab_alloc mm/slub.c:3981 [inline] __slab_alloc_node mm/slub.c:4056 [inline] slab_alloc_node mm/slub.c:4217 [inline] __do_kmalloc_node mm/slub.c:4364 [inline] __kmalloc_node_track_caller_noprof+0x2e3/0x4f0 mm/slub.c:4384 __do_krealloc mm/slub.c:4942 [inline] krealloc_noprof+0x124/0x310 mm/slub.c:4995 add_sysfs_param+0xc4/0x8c0 kernel/params.c:654 kernel_add_sysfs_param+0x7f/0xe0 kernel/params.c:811 param_sysfs_builtin+0x18a/0x230 kernel/params.c:850 param_sysfs_builtin_init+0x23/0x30 kernel/params.c:986 do_one_initcall+0x197/0x4d0 init/main.c:1269 do_initcall_level+0x117/0x1d0 init/main.c:1331 do_initcalls+0x59/0xa0 init/main.c:1347 kernel_init_freeable+0x306/0x470 init/main.c:1579 page_owner free stack trace missing Memory state around the buggy address: ffff88810df74d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88810df74e00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88810df74e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc ^ ffff88810df74f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88810df74f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================