ci starts bisection 2025-11-22 10:23:25.898838847 +0000 UTC m=+3105.636787112 bisecting cause commit starting from 88cbd8ac379cf5ce68b7efcfd4d1484a6871ee0b building syzkaller on 280ea308c321115445df610f1a75b05bbadca5f3 fetch other tags and check if the commit is present ensuring issue is reproducible on original commit 88cbd8ac379cf5ce68b7efcfd4d1484a6871ee0b testing commit 88cbd8ac379cf5ce68b7efcfd4d1484a6871ee0b gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: aa5949442725f8a1c163cd31ac793c05dea1308c19871c00bc92bc1993720ae7 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: basic kernel testing failed: SYZFAIL: failed to recv rpc run #4: basic kernel testing failed: SYZFAIL: failed to recv rpc run #5: basic kernel testing failed: SYZFAIL: failed to recv rpc run #6: crashed: WARNING: refcount bug in __vma_enter_locked run #7: crashed: WARNING: refcount bug in __vma_enter_locked run #8: crashed: WARNING: refcount bug in __vma_enter_locked run #9: crashed: WARNING: refcount bug in __vma_enter_locked run #10: crashed: WARNING: refcount bug in __vma_enter_locked run #11: crashed: WARNING: refcount bug in __vma_enter_locked run #12: crashed: WARNING: refcount bug in __vma_enter_locked run #13: crashed: WARNING: refcount bug in __vma_enter_locked run #14: crashed: WARNING: refcount bug in __vma_enter_locked run #15: crashed: WARNING: refcount bug in __vma_enter_locked run #16: crashed: WARNING: refcount bug in __vma_enter_locked run #17: crashed: WARNING: refcount bug in __vma_enter_locked run #18: crashed: WARNING: refcount bug in __vma_enter_locked run #19: crashed: WARNING: refcount bug in __vma_enter_locked representative crash: WARNING: refcount bug in __vma_enter_locked, types: [REFCOUNT_WARNING] check whether we can drop unnecessary instrumentation disabling configs for [hang memleak ubsan kasan locking atomic_sleep], they are not needed testing commit 88cbd8ac379cf5ce68b7efcfd4d1484a6871ee0b gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 41d847c6dc3cb9732951c3bdb568f1b7e001463df266505ec3391b89719ad626 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: basic kernel testing failed: SYZFAIL: failed to recv rpc run #4: basic kernel testing failed: SYZFAIL: failed to recv rpc run #5: basic kernel testing failed: SYZFAIL: failed to recv rpc run #6: basic kernel testing failed: SYZFAIL: failed to recv rpc run #7: crashed: WARNING: refcount bug in __vma_enter_locked run #8: crashed: WARNING: refcount bug in __vma_enter_locked run #9: crashed: WARNING: refcount bug in __vma_enter_locked representative crash: WARNING: refcount bug in __vma_enter_locked, types: [REFCOUNT_WARNING] unable to determine the verdict: 0 good runs (wanted 5), for bad wanted 5 in total, got 3 kconfig minimization: base=4116 full=8574 leaves diff=2171 split chunks (needed=false): <2171> split chunk #0 of len 2171 into 5 parts testing without sub-chunk 1/5 testing commit 88cbd8ac379cf5ce68b7efcfd4d1484a6871ee0b gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: c817d2c395e7995a6ca1ca8da4f18087ec9a050a36858a89864c33a8e228430d run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: basic kernel testing failed: SYZFAIL: failed to recv rpc run #4: basic kernel testing failed: SYZFAIL: failed to recv rpc run #5: crashed: WARNING: refcount bug in __vma_enter_locked run #6: crashed: WARNING: refcount bug in __vma_enter_locked run #7: crashed: WARNING: refcount bug in __vma_enter_locked run #8: crashed: WARNING: refcount bug in __vma_enter_locked run #9: crashed: WARNING: refcount bug in __vma_enter_locked representative crash: WARNING: refcount bug in __vma_enter_locked, types: [REFCOUNT_WARNING] the chunk can be dropped testing without sub-chunk 2/5 testing commit 88cbd8ac379cf5ce68b7efcfd4d1484a6871ee0b gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 97bdf83e91df3f119aa26f2b0d9f467ddcee07ed694e52e8238c6cc90f478048 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: crashed: WARNING: refcount bug in __vma_enter_locked run #4: crashed: WARNING: refcount bug in __vma_enter_locked run #5: crashed: WARNING: refcount bug in __vma_enter_locked run #6: crashed: WARNING: refcount bug in __vma_enter_locked run #7: crashed: WARNING: refcount bug in __vma_enter_locked run #8: crashed: WARNING: refcount bug in __vma_enter_locked run #9: crashed: WARNING: refcount bug in __vma_enter_locked representative crash: WARNING: refcount bug in __vma_enter_locked, types: [REFCOUNT_WARNING] the chunk can be dropped testing without sub-chunk 3/5 testing commit 88cbd8ac379cf5ce68b7efcfd4d1484a6871ee0b gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 627f0837a5b87d446f2969180518d4ef6e5b95c976560a7adc8586f663b7dcee run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: basic kernel testing failed: SYZFAIL: failed to recv rpc run #4: basic kernel testing failed: SYZFAIL: failed to recv rpc run #5: basic kernel testing failed: SYZFAIL: failed to recv rpc run #6: basic kernel testing failed: SYZFAIL: failed to recv rpc run #7: crashed: WARNING: refcount bug in __vma_enter_locked run #8: crashed: WARNING: refcount bug in __vma_enter_locked run #9: crashed: WARNING: refcount bug in __vma_enter_locked representative crash: WARNING: refcount bug in __vma_enter_locked, types: [REFCOUNT_WARNING] unable to determine the verdict: 0 good runs (wanted 5), for bad wanted 5 in total, got 3 testing without sub-chunk 4/5 testing commit 88cbd8ac379cf5ce68b7efcfd4d1484a6871ee0b gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 7e6628b98a9956c010760b6820679d8df5f25a7740aa544ff8fbaf563e7443bf run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc 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 testing without sub-chunk 5/5 testing commit 88cbd8ac379cf5ce68b7efcfd4d1484a6871ee0b gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: a855932983a2a2d9f9168bda2e70bcf2b5001e77a92d257660d09a7e018bccf9 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: basic kernel testing failed: SYZFAIL: failed to recv rpc run #4: basic kernel testing failed: SYZFAIL: failed to recv rpc run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK false negative chance: 0.000 minimized to 1301 configs; suspects: [AF_RXRPC ARCH_ENABLE_MEMORY_HOTREMOVE ATM AX25 BCMA BLK_DEV_ZONED BPF_SYSCALL BRIDGE BRIDGE_NETFILTER BT BT_BREDR BT_HIDP BXT_WC_PMIC_OPREGION CAN CARDBUS CFG80211 CFG80211_WEXT CHECKPOINT_RESTORE CMA COMMON_CLK CONTIG_ALLOC DAX DIBS DLM DMABUF_HEAPS DRM DVB_CORE ENCRYPTED_KEYS EXTCON FB_CORE GENEVE GPIOLIB HAMRADIO HAVE_CLK HID_LOGITECH HID_NINTENDO HID_NVIDIA_SHIELD HID_PLAYSTATION HID_SENSOR_HUB HID_SMARTJOYPLUS HID_STEAM HID_THRUSTMASTER HID_ZEROPLUS HSR I2C_MUX IIO INFINIBAND INFINIBAND_ADDR_TRANS INFINIBAND_IPOIB INFINIBAND_USER_ACCESS INFINIBAND_VIRT_DMA INPUT_JOYSTICK INPUT_MOUSE INPUT_TABLET INPUT_TOUCHSCREEN INTEL_SCU_IPC INTEL_SOC_PMIC_BXTWC IOMMUFD IP6_NF_IPTABLES_LEGACY IP6_NF_MANGLE IP6_NF_RAW IPV6_MULTIPLE_TABLES IP_NF_FILTER IP_NF_IPTABLES_LEGACY IP_NF_MANGLE IP_NF_MATCH_TTL IP_NF_NAT IP_NF_RAW IP_NF_SECURITY IP_NF_TARGET_ECN IP_NF_TARGET_MASQUERADE IP_NF_TARGET_NETMAP IP_NF_TARGET_REDIRECT IP_NF_TARGET_REJECT 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_ESP IP_VS_PROTO_SCTP IP_VS_PROTO_TCP IP_VS_PROTO_UDP IP_VS_RR IP_VS_SED IP_VS_SH IP_VS_TWOS IP_VS_WLC IP_VS_WRR IRQ_BYPASS_MANAGER IRQ_POLL IRQ_REMAP IR_IGORPLUGUSB IR_IGUANA IR_IMON IR_IMON_RAW IR_MCEUSB IR_REDRAT3 IR_STREAMZAP IR_TOY IR_TTUSBIR ISDN ISDN_CAPI JFFS2_CMODE_PRIORITY JFFS2_COMPRESSION_OPTIONS JFFS2_FS JFFS2_FS_POSIX_ACL JFFS2_FS_SECURITY JFFS2_FS_WRITEBUFFER JFFS2_FS_XATTR JFFS2_LZO JFFS2_RTIME JFFS2_RUBIN JFFS2_SUMMARY JFFS2_ZLIB JFS_DEBUG JFS_FS JFS_POSIX_ACL JFS_SECURITY JOYSTICK_IFORCE JOYSTICK_IFORCE_USB JOYSTICK_PXRC JOYSTICK_XPAD JOYSTICK_XPAD_FF JOYSTICK_XPAD_LEDS KARMA_PARTITION KCOV KCOV_ENABLE_COMPARISONS KCOV_INSTRUMENT_ALL KEYS_REQUEST_CACHE KEY_DH_OPERATIONS KEY_NOTIFICATIONS KSM KVM KVM_AMD KVM_ASYNC_PF KVM_COMMON KVM_COMPAT KVM_ELIDE_TLB_FLUSH_IF_YOUNG KVM_GENERIC_DIRTYLOG_READ_PROTECT KVM_GENERIC_HARDWARE_ENABLING KVM_GENERIC_MEMORY_ATTRIBUTES KVM_GENERIC_MMU_NOTIFIER KVM_GENERIC_PRE_FAULT_MEMORY KVM_GUEST_MEMFD KVM_HYPERV KVM_INTEL KVM_IOAPIC KVM_MMIO KVM_MMU_LOCKLESS_AGING KVM_PROVE_MMU KVM_SW_PROTECTED_VM KVM_VFIO KVM_X86 KVM_XEN L2TP L2TP_ETH L2TP_IP L2TP_V3 LAPB LAPBETHER LDM_PARTITION LEDS_CLASS_MULTICOLOR LEGACY_PTYS LIBNVDIMM LINEAR_RANGES LLC LLC2 LOCALVERSION_AUTO LOGIG940_FF LOGIRUMBLEPAD2_FF LOGITECH_FF LOGIWHEELS_FF LOGO LOGO_LINUX_MONO LOGO_LINUX_VGA16 LPC_ICH LWTUNNEL LWTUNNEL_BPF LZ4HC_COMPRESS LZ4_COMPRESS MAC80211 MAC80211_HAS_RC MAC80211_HWSIM MAC80211_MESH MAC80211_RC_DEFAULT_MINSTREL MAC80211_RC_MINSTREL MACSEC MACVLAN MACVTAP MAC_PARTITION MAPPING_DIRTY_HELPERS MCTP MDIO_MVUSB MD_RAID0 MD_RAID1 MD_RAID10 MD_RAID456 MEDIA_ANALOG_TV_SUPPORT MEDIA_ATTACH MEDIA_CAMERA_SUPPORT MEDIA_CEC_SUPPORT MEDIA_COMMON_OPTIONS MEDIA_CONTROLLER MEDIA_CONTROLLER_DVB MEDIA_DIGITAL_TV_SUPPORT MEDIA_PLATFORM_SUPPORT MEDIA_RADIO_SUPPORT MEDIA_SDR_SUPPORT MEDIA_SUPPORT MEDIA_SUPPORT_FILTER MEDIA_TEST_SUPPORT MEDIA_TUNER MEDIA_TUNER_MSI001 MEDIA_USB_SUPPORT MEMORY_BALLOON MEMORY_HOTPLUG MEMORY_HOTREMOVE MEMORY_ISOLATION MEMREGION MEMSTICK MEMSTICK_REALTEK_USB MEM_SOFT_DIRTY MFD_CORE MFD_DLN2 MFD_INTEL_PMC_BXT MFD_MT6360 MFD_MT6370 MFD_RETU MFD_SYSCON MFD_VIPERBOARD MHI_BUS MHI_WWAN_CTRL MHP_DEFAULT_ONLINE_TYPE_ONLINE_AUTO MHP_MEMMAP_ON_MEMORY MICROCHIP_PHY MINIX_FS MINIX_SUBPARTITION MISC_RTSX MISC_RTSX_USB MISDN MISDN_DSP MISDN_HFCUSB MISDN_L1OIP MKISS MLX4_CORE MLX4_INFINIBAND MMC MMC_REALTEK_USB MMC_USHC MMC_VUB300 MM_ID MODULE_SRCVERSION_ALL MOST MOST_USB_HDM MOUSE_APPLETOUCH MOUSE_BCM5974 MOUSE_PS2 MOUSE_PS2_ALPS MOUSE_PS2_BYD MOUSE_PS2_CYPRESS MOUSE_PS2_FOCALTECH MOUSE_PS2_LIFEBOOK MOUSE_PS2_LOGIPS2PP MOUSE_PS2_SMBUS MOUSE_PS2_SYNAPTICS MOUSE_PS2_SYNAPTICS_SMBUS MOUSE_PS2_TRACKPOINT MOUSE_SYNAPTICS_USB MPLS MPLS_IPTUNNEL MPLS_ROUTING MPTCP MPTCP_IPV6 MRP MTD MTD_BLKDEVS MTD_BLOCK MTD_BLOCK2MTD MTD_CFI_I1 MTD_CFI_I2 MTD_MAP_BANK_WIDTH_1 MTD_MAP_BANK_WIDTH_2 MTD_MAP_BANK_WIDTH_4 MTD_MTDRAM MTD_PHRAM MTD_SLRAM MTD_UBI MUSB_PIO_ONLY ND_BTT ND_CLAIM ND_PFN NETDEVSIM NETFILTER_ADVANCED NETFILTER_BPF_LINK NETFILTER_CONNCOUNT NETFILTER_FAMILY_ARP NETFILTER_FAMILY_BRIDGE NETFILTER_NETLINK_ACCT NETFILTER_NETLINK_GLUE_CT NETFILTER_NETLINK_OSF NETFILTER_NETLINK_QUEUE NETFILTER_SYNPROXY NETFILTER_XTABLES_COMPAT NETFILTER_XTABLES_LEGACY NETFILTER_XT_CONNMARK NETFILTER_XT_MATCH_BPF NETFILTER_XT_MATCH_CGROUP NETFILTER_XT_MATCH_CLUSTER NETFILTER_XT_MATCH_COMMENT NETFILTER_XT_MATCH_CONNBYTES NETFILTER_XT_MATCH_CONNLABEL NETFILTER_XT_MATCH_CONNLIMIT NETFILTER_XT_MATCH_CONNMARK NETFILTER_XT_MATCH_CPU NETFILTER_XT_MATCH_DCCP NETFILTER_XT_MATCH_DEVGROUP NETFILTER_XT_MATCH_DSCP NETFILTER_XT_MATCH_ECN NETFILTER_XT_MATCH_ESP 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VIDEO_CX231XX_DVB VIDEO_CX231XX_RC VIDEO_CX2341X VIDEO_CX25840 VIDEO_DEV VIDEO_EM28XX VIDEO_EM28XX_ALSA VIDEO_EM28XX_DVB VIDEO_EM28XX_RC VIDEO_EM28XX_V4L2 VIDEO_GO7007 VIDEO_GO7007_LOADER VIDEO_GO7007_USB VIDEO_GO7007_USB_S2250_BOARD VIDEO_HDPVR VIDEO_MSP3400 VIDEO_PVRUSB2 VIDEO_PVRUSB2_DVB VIDEO_PVRUSB2_SYSFS VIDEO_SAA711X VIDEO_STK1160 VIDEO_TUNER VIDEO_TVEEPROM VIDEO_USBTV VIDEO_V4L2_I2C VIDEO_V4L2_SUBDEV_API VIDEO_V4L2_TPG VIDEO_VICODEC VIDEO_VIM2M VIDEO_VIMC VIDEO_VIVID VIDEO_VIVID_CEC VIDEO_WM8775 VIPERBOARD_ADC VIRTIO_BALLOON VIRTIO_DMA_SHARED_BUFFER VIRTIO_MEM VIRTIO_MMIO VIRTIO_MMIO_CMDLINE_DEVICES VIRTIO_PMEM VIRTIO_VDPA VIRTIO_VSOCKETS VIRTIO_VSOCKETS_COMMON VIRT_WIFI VIRT_XFER_TO_GUEST_WORK VLAN_8021Q VLAN_8021Q_GVRP VLAN_8021Q_MVRP VMAP_PFN VMWARE_VMCI VMXNET3 VP_VDPA VSOCKETS VSOCKETS_DIAG VSOCKETS_LOOPBACK VSOCKMON VT_HW_CONSOLE_BINDING VXFS_FS VXLAN WAN WANT_DEV_COREDUMP WATCH_QUEUE WEXT_CORE WEXT_PROC WIREGUARD WIRELESS WLAN WLAN_VENDOR_ADMTEK WLAN_VENDOR_PURELIFI WLAN_VENDOR_SILABS WWAN X25 X86_FRED X86_SGX X86_SGX_KVM X86_USER_SHADOW_STACK XDP_SOCKETS XDP_SOCKETS_DIAG XFRM_ESPINTCP XFRM_INTERFACE XFRM_IPCOMP XFRM_MIGRATE XFRM_OFFLOAD XFRM_STATISTICS XFRM_SUB_POLICY XFRM_USER_COMPAT XFS_FS XFS_POSIX_ACL XFS_QUOTA XFS_RT XILLYBUS_CLASS XILLYUSB XOR_BLOCKS YENTA YENTA_ENE_TUNE YENTA_O2 YENTA_RICOH YENTA_TI YENTA_TOSHIBA ZEROPLUS_FF ZLIB_DEFLATE ZONEFS_FS ZONE_DEVICE ZRAM ZRAM_BACKEND_FORCE_LZO ZRAM_BACKEND_LZO ZRAM_DEF_COMP_LZO ZSMALLOC ZSTD_COMPRESS ZSWAP ZSWAP_COMPRESSOR_DEFAULT_842 ZSWAP_DEFAULT_ON ZSWAP_SHRINKER_DEFAULT_ON] 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: 5c97bff0407cee80e4b173f659854d42c82e8ea35fe2a8c35d2d6d4896b8af0a run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc 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 start 88cbd8ac379cf5ce68b7efcfd4d1484a6871ee0b e5f0a698b34ed76002dc5cff3804a61c80233a7a Bisecting: 12561 revisions left to test after this (roughly 14 steps) [9361cace0d07954ad8f2345c057976ab1bf44488] Merge tag 's390-6.18-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux testing commit 9361cace0d07954ad8f2345c057976ab1bf44488 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 69aabaa41bb28cd18354cd2253e6dfd232d55e30b0f7622707fa1adae13cefe4 all runs: OK false negative chance: 0.000 # git bisect good 9361cace0d07954ad8f2345c057976ab1bf44488 Bisecting: 6686 revisions left to test after this (roughly 13 steps) [bcfd7495f5d485d0a9a416ac06382f3266cc69cb] Merge branch 'for-next' of https://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma.git testing commit bcfd7495f5d485d0a9a416ac06382f3266cc69cb gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 3a369d576c48c066da8bc4c02607315882707ea971fd4f476c8d5bac962ff3f1 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: crashed: WARNING: refcount bug in __vma_enter_locked run #4: crashed: WARNING: refcount bug in __vma_enter_locked run #5: crashed: WARNING: refcount bug in __vma_enter_locked run #6: crashed: WARNING: refcount bug in __vma_enter_locked run #7: crashed: WARNING: refcount bug in __vma_enter_locked run #8: crashed: WARNING: refcount bug in __vma_enter_locked run #9: crashed: WARNING: refcount bug in __vma_enter_locked representative crash: WARNING: refcount bug in __vma_enter_locked, types: [REFCOUNT_WARNING] # git bisect bad bcfd7495f5d485d0a9a416ac06382f3266cc69cb Bisecting: 2939 revisions left to test after this (roughly 12 steps) [53caa832e312fcf7ec4314009c6b7d8407072ad6] Merge branch 'for-next/core' of https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux testing commit 53caa832e312fcf7ec4314009c6b7d8407072ad6 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 71490f796294e6109dec7568114db442c985646153ebc5ff3f75f56c20693031 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: crashed: WARNING: refcount bug in __vma_enter_locked run #2: crashed: WARNING: refcount bug in __vma_enter_locked run #3: crashed: WARNING: refcount bug in __vma_enter_locked run #4: crashed: WARNING: refcount bug in __vma_enter_locked run #5: crashed: WARNING: refcount bug in __vma_enter_locked run #6: crashed: WARNING: refcount bug in __vma_enter_locked run #7: crashed: WARNING: refcount bug in __vma_enter_locked run #8: crashed: WARNING: refcount bug in __vma_enter_locked run #9: OK representative crash: WARNING: refcount bug in __vma_enter_locked, types: [REFCOUNT_WARNING] # git bisect bad 53caa832e312fcf7ec4314009c6b7d8407072ad6 Bisecting: 1467 revisions left to test after this (roughly 11 steps) [15f32cabf426143ec1d2c8faf2bbca40c0fbd61b] Bluetooth: 6lowpan: add missing l2cap_chan_lock() testing commit 15f32cabf426143ec1d2c8faf2bbca40c0fbd61b gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 342bc9f7a5ec73fe4bbf6e741a537398bc640cf0994c18b15ba69956dfe99fed run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc run #3: basic kernel testing failed: SYZFAIL: failed to recv rpc 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 15f32cabf426143ec1d2c8faf2bbca40c0fbd61b Bisecting: 728 revisions left to test after this (roughly 10 steps) [4128da0e23a5c9605abdc4c51f132b0009c8faf4] Merge branch 'fixes' of https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git testing commit 4128da0e23a5c9605abdc4c51f132b0009c8faf4 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 21ec0f35fee68d879c06f9737b0cf4b2509d4acd55aace972cedb03e7de45ac0 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc 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 4128da0e23a5c9605abdc4c51f132b0009c8faf4 Bisecting: 342 revisions left to test after this (roughly 9 steps) [35ae872c6e452b92c727a188058646692892eba5] Merge branch 'mm-unstable' of https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm testing commit 35ae872c6e452b92c727a188058646692892eba5 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 77b23e64ff5823757add0b84ae3a714fbebbed3f2d5ca99f59669c812244e3f6 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: crashed: WARNING: refcount bug in __vma_enter_locked run #2: crashed: WARNING: refcount bug in __vma_enter_locked run #3: crashed: WARNING: refcount bug in __vma_enter_locked run #4: crashed: WARNING: refcount bug in __vma_enter_locked run #5: crashed: WARNING: refcount bug in __vma_enter_locked run #6: crashed: WARNING: refcount bug in __vma_enter_locked run #7: crashed: WARNING: refcount bug in __vma_enter_locked run #8: crashed: WARNING: refcount bug in __vma_enter_locked run #9: crashed: WARNING: refcount bug in __vma_enter_locked representative crash: WARNING: refcount bug in __vma_enter_locked, types: [REFCOUNT_WARNING] # git bisect bad 35ae872c6e452b92c727a188058646692892eba5 Bisecting: 192 revisions left to test after this (roughly 8 steps) [08a3760805babd2d268a151054c41c18e1f44d10] selftests/mm/hmm-tests: partial unmap, mremap and anon_write tests testing commit 08a3760805babd2d268a151054c41c18e1f44d10 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: f97611823acfe8404d60816f89313970d23dd7bbc6ab12e8b5b7ba1c299fef7b run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc 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 08a3760805babd2d268a151054c41c18e1f44d10 Bisecting: 96 revisions left to test after this (roughly 7 steps) [593ee540003117f9bf6d1eceb911501f80199727] mm/khugepaged: continue to collapse on SCAN_PMD_NONE testing commit 593ee540003117f9bf6d1eceb911501f80199727 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 50cb6f6c0e5d4c93cc26259332192f41a64e51f9717f03f49b1bf3dd9e2a82cf run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: crashed: WARNING: refcount bug in __vma_enter_locked run #2: crashed: WARNING: refcount bug in __vma_enter_locked run #3: crashed: WARNING: refcount bug in __vma_enter_locked run #4: crashed: WARNING: refcount bug in __vma_enter_locked run #5: crashed: WARNING: refcount bug in __vma_enter_locked run #6: crashed: WARNING: refcount bug in __vma_enter_locked run #7: crashed: WARNING: refcount bug in __vma_enter_locked run #8: crashed: WARNING: refcount bug in __vma_enter_locked run #9: crashed: WARNING: refcount bug in __vma_enter_locked representative crash: WARNING: refcount bug in __vma_enter_locked, types: [REFCOUNT_WARNING] # git bisect bad 593ee540003117f9bf6d1eceb911501f80199727 Bisecting: 47 revisions left to test after this (roughly 6 steps) [e416712c2d2c4e1d3536c105dd6048a3ca3d3721] mm: replace pmd_to_swp_entry() with softleaf_from_pmd() testing commit e416712c2d2c4e1d3536c105dd6048a3ca3d3721 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 7b09040f4619bb9f18fe0ba0d39118f577a2a175c8621e35161a9c48b1a55157 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc 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 e416712c2d2c4e1d3536c105dd6048a3ca3d3721 Bisecting: 23 revisions left to test after this (roughly 5 steps) [f3ef8ff9ecbac526329a35735f6c4002ff91467d] mm/damon/tests/core-kunit: add damos_commit_dests() test testing commit f3ef8ff9ecbac526329a35735f6c4002ff91467d gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 0faa0be2a3477f35842ac17490c33bdb4f78a1c7d2c1306d9e0ae48e7027a531 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: crashed: WARNING: refcount bug in __vma_enter_locked run #3: crashed: WARNING: refcount bug in __vma_enter_locked run #4: crashed: WARNING: refcount bug in __vma_enter_locked run #5: crashed: WARNING: refcount bug in __vma_enter_locked run #6: crashed: WARNING: refcount bug in __vma_enter_locked run #7: crashed: WARNING: refcount bug in __vma_enter_locked run #8: crashed: WARNING: refcount bug in __vma_enter_locked run #9: crashed: WARNING: refcount bug in __vma_enter_locked representative crash: WARNING: refcount bug in __vma_enter_locked, types: [REFCOUNT_WARNING] # git bisect bad f3ef8ff9ecbac526329a35735f6c4002ff91467d Bisecting: 11 revisions left to test after this (roughly 4 steps) [5cfa611b2ef9b13a86fa967cb061c0d0d6172a5b] mm: thp: use folio_batch to handle THP splitting in deferred_split_scan() testing commit 5cfa611b2ef9b13a86fa967cb061c0d0d6172a5b gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 5d6c8ad2828b955271aa4aff3e00875755b190b583958fd9b753498d4ad9b382 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc 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 5cfa611b2ef9b13a86fa967cb061c0d0d6172a5b Bisecting: 5 revisions left to test after this (roughly 3 steps) [dce3a593a731a366e2ea801a87128b9f7b8faf24] mm/damon/tests/core-kunit: extend damos_test_commit_filter_for() for union fields testing commit dce3a593a731a366e2ea801a87128b9f7b8faf24 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: e2353a3a5bc3a556018630dc4bd52b00b5a0f82ebfec607976a1a757ff4d2aa9 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc run #2: crashed: WARNING: refcount bug in __vma_enter_locked run #3: crashed: WARNING: refcount bug in __vma_enter_locked run #4: crashed: WARNING: refcount bug in __vma_enter_locked run #5: crashed: WARNING: refcount bug in __vma_enter_locked run #6: crashed: WARNING: refcount bug in __vma_enter_locked run #7: crashed: WARNING: refcount bug in __vma_enter_locked run #8: crashed: WARNING: refcount bug in __vma_enter_locked run #9: crashed: WARNING: refcount bug in __vma_enter_locked representative crash: WARNING: refcount bug in __vma_enter_locked, types: [REFCOUNT_WARNING] # git bisect bad dce3a593a731a366e2ea801a87128b9f7b8faf24 Bisecting: 2 revisions left to test after this (roughly 2 steps) [c52a4e7b13eaa55a2c4bb08488b2cf9bd188ea85] mm: use vma_start_write_killable() in dup_mmap() testing commit c52a4e7b13eaa55a2c4bb08488b2cf9bd188ea85 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: b8eb04f34916c14a2a849346d98a54e820bbb28d75b167c0eda24dd69ef29d8a all runs: crashed: WARNING: refcount bug in __vma_enter_locked representative crash: WARNING: refcount bug in __vma_enter_locked, types: [REFCOUNT_WARNING] # git bisect bad c52a4e7b13eaa55a2c4bb08488b2cf9bd188ea85 Bisecting: 0 revisions left to test after this (roughly 1 step) [c74b8ecb9948ad0ba1ff8b3857f48d871e19aca4] mm: add vma_start_write_killable() testing commit c74b8ecb9948ad0ba1ff8b3857f48d871e19aca4 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: d25cf9f416099eb9de3bf74cd1b45b8c4f9b6f5d953fffcf3839049c348d9a60 run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc 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 c74b8ecb9948ad0ba1ff8b3857f48d871e19aca4 c52a4e7b13eaa55a2c4bb08488b2cf9bd188ea85 is the first bad commit commit c52a4e7b13eaa55a2c4bb08488b2cf9bd188ea85 Author: Matthew Wilcox (Oracle) Date: Mon Nov 10 20:32:02 2025 +0000 mm: use vma_start_write_killable() in dup_mmap() Allow waiting for the VMA write lock to be interrupted by fatal signals. The explicit check for fatal_signal_pending() can be removed as it is checked during vma_start_write_killable(). Improves the latency of killing the task as we do not wait for the reader to finish before checking for signals. Link: https://lkml.kernel.org/r/20251110203204.1454057-3-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: Suren Baghdasaryan Reviewed-by: Liam R. Howlett Reviewed-by: Vlastimil Babka Reviewed-by: Lorenzo Stoakes Cc: Chris Li Cc: Jann Horn Cc: Shakeel Butt Signed-off-by: Andrew Morton mm/mmap.c | 12 +++--------- 1 file changed, 3 insertions(+), 9 deletions(-) accumulated error probability: 0.00 culprit signature: b8eb04f34916c14a2a849346d98a54e820bbb28d75b167c0eda24dd69ef29d8a parent signature: d25cf9f416099eb9de3bf74cd1b45b8c4f9b6f5d953fffcf3839049c348d9a60 revisions tested: 22, total time: 9h51m50.39492222s (build: 5h40m50.642659107s, test: 3h29m16.204589593s) first bad commit: c52a4e7b13eaa55a2c4bb08488b2cf9bd188ea85 mm: use vma_start_write_killable() in dup_mmap() recipients (to): ["akpm@linux-foundation.org" "liam.howlett@oracle.com" "lorenzo.stoakes@oracle.com" "surenb@google.com" "vbabka@suse.cz" "willy@infradead.org"] recipients (cc): [] crash: WARNING: refcount bug in __vma_enter_locked ------------[ cut here ]------------ refcount_t: saturated; leaking memory. WARNING: CPU: 1 PID: 5992 at lib/refcount.c:19 refcount_warn_saturate+0x13a/0x1d0 lib/refcount.c:19 Modules linked in: CPU: 1 UID: 0 PID: 5992 Comm: syz.1.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:refcount_warn_saturate+0x13a/0x1d0 lib/refcount.c:19 Code: e0 12 45 89 e8 07 41 bb fd 90 0f 0b 90 90 eb b7 e8 bb 35 f7 fd c6 05 99 ef 72 08 01 90 48 c7 c7 20 12 45 89 e8 e7 40 bb fd 90 <0f> 0b 90 90 eb 97 e8 9b 35 f7 fd c6 05 7d ef 72 08 01 90 48 c7 c7 RSP: 0018:ffffc90003587588 EFLAGS: 00010246 RAX: 3820b733b9153400 RBX: 0000000000000000 RCX: ffff888026911e00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002 RBP: ffffc900035876b0 R08: ffff8880b8f24253 R09: 1ffff110171e484a R10: dffffc0000000000 R11: ffffed10171e484b R12: ffff888073d391c0 R13: 1ffff920006b0ec4 R14: ffff888073d391c0 R15: 0000000000000000 FS: 00007fc2caeb96c0(0000) GS:ffff88812a5c4000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc31c1d54e8 CR3: 000000007a052000 CR4: 00000000003526f0 Call Trace: __refcount_add_not_zero include/linux/refcount.h:187 [inline] refcount_add_not_zero include/linux/refcount.h:212 [inline] __vma_enter_locked+0x593/0x5d0 mm/mmap_lock.c:67 __vma_start_write+0x23/0x140 mm/mmap_lock.c:99 vma_start_write include/linux/mmap_lock.h:213 [inline] vma_merge_existing_range mm/vma.c:900 [inline] vma_modify+0xf62/0x1a70 mm/vma.c:1611 vma_modify_flags_uffd+0x1ff/0x250 mm/vma.c:1704 userfaultfd_clear_vma mm/userfaultfd.c:1997 [inline] userfaultfd_release_all+0x34c/0x5d0 mm/userfaultfd.c:2116 userfaultfd_release+0xe7/0x1b0 fs/userfaultfd.c:887 __fput+0x44c/0xa70 fs/file_table.c:468 task_work_run+0x1d4/0x260 kernel/task_work.c:227 get_signal+0x11ec/0x1340 kernel/signal.c:2807 arch_do_signal_or_restart+0xa0/0x790 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop+0x72/0x130 kernel/entry/common.c:40 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline] do_syscall_64+0x2bd/0xfa0 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc2c9f8f749 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:00007fc2caeb8fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: fffffffffffffff4 RBX: 00007fc2ca1e6090 RCX: 00007fc2c9f8f749 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007fc2ca013f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fc2ca1e6128 R14: 00007fc2ca1e6090 R15: 00007fff5b64a828