ci2 starts bisection 2026-07-14 15:23:53.677433006 +0000 UTC m=+56293.284456827 bisecting fixing commit since 228da13e907e2b46b7222cfc35290fbfad920bef building syzkaller on 1d2f35898f2e0325486423250d5303b6bc05adcd ensuring issue is reproducible on original commit 228da13e907e2b46b7222cfc35290fbfad920bef testing commit 228da13e907e2b46b7222cfc35290fbfad920bef gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 44db4fc8d106aeb4355905aaaa64d4091eff50e889ee7a5c95390338b09fce13 all runs: crashed: KASAN: use-after-free Read in release_metapage representative crash: KASAN: use-after-free Read in release_metapage, types: [KASAN-USE-AFTER-FREE-READ] check whether we can drop unnecessary instrumentation disabling configs for [bug_or_warning locking atomic_sleep hang memleak ubsan], they are not needed testing commit 228da13e907e2b46b7222cfc35290fbfad920bef gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 34384809959c3d648026910eb085dd46c12236268740b5d264257280e19483b3 all runs: crashed: KASAN: use-after-free Read in release_metapage representative crash: KASAN: use-after-free Read in release_metapage, types: [KASAN-USE-AFTER-FREE-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=7505 full=9786 leaves diff=2009 split chunks (needed=false): <2009> split chunk #0 of len 2009 into 5 parts testing without sub-chunk 1/5 disabling configs for [ubsan bug_or_warning locking atomic_sleep hang memleak], they are not needed testing commit 228da13e907e2b46b7222cfc35290fbfad920bef gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 9c3ebf4df7e5100e3fd18cd8efc6d7fe5a95338b7c2e226079842e261cc8572a all runs: OK false negative chance: 0.000 testing without sub-chunk 2/5 disabling configs for [bug_or_warning locking atomic_sleep hang memleak ubsan], they are not needed testing commit 228da13e907e2b46b7222cfc35290fbfad920bef gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 3e0db3803692ccf3603204078e25edf5b6d57f63e4ebca177a99862fbc8985cd all runs: crashed: KASAN: use-after-free Read in release_metapage representative crash: KASAN: use-after-free Read in release_metapage, types: [KASAN-USE-AFTER-FREE-READ] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [bug_or_warning locking atomic_sleep hang memleak ubsan], they are not needed testing commit 228da13e907e2b46b7222cfc35290fbfad920bef gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: f28762938688da3f4e71f3bedf51c2d253333040829f17874d2422a50c7c6cc5 all runs: OK false negative chance: 0.000 testing without sub-chunk 4/5 disabling configs for [memleak ubsan bug_or_warning locking atomic_sleep hang], they are not needed testing commit 228da13e907e2b46b7222cfc35290fbfad920bef gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: ad13676b46d0489095ae4f51be405e71fd0c81ccb46b9dd61f4bb10659d6e86c all runs: crashed: KASAN: use-after-free Read in release_metapage representative crash: KASAN: use-after-free Read in release_metapage, types: [KASAN-USE-AFTER-FREE-READ] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [bug_or_warning locking atomic_sleep hang memleak ubsan], they are not needed testing commit 228da13e907e2b46b7222cfc35290fbfad920bef gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 20fd924f46a093e9eba600d02d58f8ad2c6054029424d82a7810ad8bf5d6c4e2 all runs: crashed: KASAN: use-after-free Read in release_metapage representative crash: KASAN: use-after-free Read in release_metapage, types: [KASAN-USE-AFTER-FREE-READ] the chunk can be dropped minimized to 804 configs; suspects: [6LOWPAN 6LOWPAN_GHC_EXT_HDR_DEST 6LOWPAN_GHC_EXT_HDR_FRAG 6LOWPAN_GHC_EXT_HDR_HOP 6LOWPAN_GHC_EXT_HDR_ROUTE 6LOWPAN_GHC_ICMPV6 6LOWPAN_GHC_UDP 6LOWPAN_NHC 6LOWPAN_NHC_DEST 6LOWPAN_NHC_FRAGMENT 6LOWPAN_NHC_HOP 6LOWPAN_NHC_IPV6 6LOWPAN_NHC_MOBILITY 6LOWPAN_NHC_ROUTING 6LOWPAN_NHC_UDP 6PACK 842_COMPRESS 842_DECOMPRESS 9P_FSCACHE 9P_FS_POSIX_ACL 9P_FS_SECURITY ACORN_PARTITION ACORN_PARTITION_ADFS ACORN_PARTITION_CUMANA ACORN_PARTITION_EESOX ACORN_PARTITION_ICS ACORN_PARTITION_POWERTEC ACORN_PARTITION_RISCIX ACPI_DOCK ADFS_FS AFFS_FS AFS_FS AFS_FSCACHE AF_KCM AF_RXRPC AF_RXRPC_IPV6 AIX_PARTITION AMIGA_PARTITION ANDROID_BINDERFS ANDROID_BINDER_IPC ANON_VMA_NAME APPLE_MFI_FASTCHARGE AR5523 ARM_SDE_INTERFACE ASM_MODVERSIONS ASYNC_CORE ASYNC_MEMCPY ASYNC_PQ ASYNC_RAID6_RECOV ASYNC_TX_DMA ASYNC_XOR ATARI_PARTITION ATA_GENERIC ATA_OVER_ETH ATA_PIIX ATH10K ATH10K_CE ATH10K_PCI ATH10K_SNOC ATH10K_USB ATH11K ATH11K_AHB ATH11K_PCI ATH6KL ATH6KL_USB ATH9K ATH9K_AHB ATH9K_BTCOEX_SUPPORT ATH9K_CHANNEL_CONTEXT ATH9K_COMMON ATH9K_COMMON_DEBUG ATH9K_COMMON_SPECTRAL ATH9K_DEBUGFS ATH9K_DYNACK ATH9K_HTC ATH9K_HTC_DEBUGFS ATH9K_HW ATH9K_PCI ATH9K_PCOEM ATH9K_RFKILL ATH_COMMON ATM ATM_BR2684 ATM_CLIP ATM_DRIVERS ATM_LANE ATM_MPOA ATM_TCP AX25 AX25_DAMA_SLAVE BAREUDP BATMAN_ADV BATMAN_ADV_BATMAN_V BATMAN_ADV_BLA BATMAN_ADV_DAT BATMAN_ADV_MCAST BATMAN_ADV_NC BCACHE BCMA BCMA_HOST_PCI_POSSIBLE BEFS_FS BFQ_CGROUP_DEBUG BFQ_GROUP_IOSCHED BFS_FS BIG_KEYS BINFMT_MISC BLK_CGROUP_IOCOST BLK_CGROUP_IOLATENCY BLK_CGROUP_RWSTAT BLK_DEBUG_FS_ZONED BLK_DEV_NULL_BLK BLK_DEV_NULL_BLK_FAULT_INJECTION BLK_DEV_RAM BLK_DEV_RNBD BLK_DEV_RNBD_CLIENT BLK_DEV_SR BLK_DEV_THROTTLING BLK_DEV_UBLK BLK_DEV_ZONED BLK_ICQ BLK_INLINE_ENCRYPTION BLK_INLINE_ENCRYPTION_FALLBACK BLK_MQ_RDMA BLK_RQ_ALLOC_TIME BLK_WBT BLK_WBT_MQ BONDING BPF_JIT_ALWAYS_ON BPQETHER BRIDGE_CFM BRIDGE_EBT_802_3 BRIDGE_EBT_AMONG BRIDGE_EBT_ARP BRIDGE_EBT_ARPREPLY BRIDGE_EBT_BROUTE BRIDGE_EBT_DNAT BRIDGE_EBT_IP BRIDGE_EBT_IP6 BRIDGE_EBT_LIMIT BRIDGE_EBT_LOG BRIDGE_EBT_MARK BRIDGE_EBT_MARK_T BRIDGE_EBT_NFLOG BRIDGE_EBT_PKTTYPE BRIDGE_EBT_REDIRECT BRIDGE_EBT_SNAT BRIDGE_EBT_STP BRIDGE_EBT_T_FILTER BRIDGE_EBT_T_NAT BRIDGE_EBT_VLAN BRIDGE_MRP BRIDGE_NF_EBTABLES BSD_DISKLABEL BTRFS_ASSERT BTRFS_FS_REF_VERIFY BT_6LOWPAN BT_ATH3K BT_BNEP BT_BNEP_MC_FILTER BT_BNEP_PROTO_FILTER BT_CMTP BT_HCIBCM203X BT_HCIBFUSB BT_HCIBPA10X BT_HCIBTUSB_AUTOSUSPEND BT_HCIBTUSB_MTK BT_HCIUART_3WIRE BT_HCIUART_AG6XX BT_HCIUART_BCSP BT_HCIVHCI BT_HS BT_LE BT_MSFTEXT BT_MTK BT_RFCOMM BT_RFCOMM_TTY CACHEFILES CAIF CAIF_DEBUG CAIF_DRIVERS CAIF_NETDEV CAIF_TTY CAIF_USB CAIF_VIRTIO CAN_8DEV_USB CAN_EMS_USB CAN_ESD_USB CAN_ETAS_ES58X CAN_GS_USB CAN_IFI_CANFD CAN_ISOTP CAN_J1939 CAN_KVASER_USB CAN_MCBA_USB CAN_PEAK_USB CAN_SLCAN CAN_UCAN CAN_VCAN CAN_VXCAN CAPI_TRACE CARL9170 CARL9170_HWRNG CARL9170_LEDS CARL9170_WPC CDROM CEC_CORE CEC_NOTIFIER CEPH_FS CEPH_FSCACHE CEPH_FS_POSIX_ACL CEPH_LIB CEPH_LIB_USE_DNS_RESOLVER CFG80211 CFG80211_CRDA_SUPPORT CFG80211_DEBUGFS CFG80211_DEFAULT_PS CFG80211_REQUIRE_SIGNED_REGDB CFG80211_USE_KERNEL_REGDB_KEYS CFG80211_WEXT CFS_BANDWIDTH CGROUP_NET_CLASSID CGROUP_NET_PRIO CGROUP_RDMA CHARGER_BQ24190 CHARGER_ISP1704 CHECKPOINT_RESTORE CHECK_SIGNATURE CHR_DEV_SG CHR_DEV_ST CIFS CIFS_ALLOW_INSECURE_LEGACY CIFS_DEBUG CIFS_DFS_UPCALL CIFS_FSCACHE CIFS_POSIX CIFS_SMB_DIRECT CIFS_SWN_UPCALL CIFS_UPCALL CIFS_XATTR CLS_U32_MARK CLS_U32_PERF CMDLINE_PARTITION COMEDI COMEDI_8254 COMEDI_8255 COMEDI_8255_PCI COMEDI_8255_SA COMEDI_ADL_PCI9118 COMEDI_BOND COMEDI_DT9812 COMEDI_KCOMEDILIB COMEDI_MISC_DRIVERS COMEDI_NI_DAQ_700_CS COMEDI_NI_LABPC COMEDI_NI_LABPC_CS COMEDI_NI_LABPC_PCI COMEDI_NI_USB6501 COMEDI_PARPORT COMEDI_PCI_DRIVERS COMEDI_PCMCIA_DRIVERS COMEDI_TEST COMEDI_USBDUX COMEDI_USBDUXFAST COMEDI_USBDUXSIGMA COMEDI_USB_DRIVERS COMEDI_VMK80XX COMPAT_NETLINK_MESSAGES CONNECTOR COUNTER CPU_FREQ_DEFAULT_GOV_USERSPACE CRAMFS CRAMFS_BLOCKDEV CRAMFS_MTD CRC4 CRYPTO_ADIANTUM CRYPTO_AEGIS128 CRYPTO_AES_ARM64 CRYPTO_AES_TI CRYPTO_ANUBIS CRYPTO_ARC4 CRYPTO_ARCH_HAVE_LIB_POLY1305 CRYPTO_ARIA CRYPTO_BLOWFISH CRYPTO_BLOWFISH_COMMON CRYPTO_CAMELLIA CRYPTO_CHACHA20 CRYPTO_CHACHA20POLY1305 CRYPTO_CRC32 CRYPTO_CTS CRYPTO_DEV_CCP CRYPTO_DEV_CCP_DD CRYPTO_DEV_VIRTIO CRYPTO_DRBG_CTR CRYPTO_DRBG_HASH CRYPTO_ECRDSA CRYPTO_ESSIV CRYPTO_FCRYPT CRYPTO_HCTR2 CRYPTO_KDF800108_CTR CRYPTO_KEYWRAP CRYPTO_KHAZAD CRYPTO_LIB_ARC4 CRYPTO_LIB_CHACHA CRYPTO_LIB_CHACHA20POLY1305 CRYPTO_LIB_CURVE25519 CRYPTO_LIB_POLY1305 CRYPTO_LIB_POLY1305_GENERIC CRYPTO_LRW CRYPTO_NHPOLY1305 CRYPTO_PCBC CRYPTO_PCRYPT CRYPTO_POLY1305 CRYPTO_POLY1305_NEON CRYPTO_POLYVAL CRYPTO_RMD160 CRYPTO_SEED CRYPTO_SEQIV CRYPTO_SM2 CRYPTO_SM4_ARM64_CE CRYPTO_SM4_ARM64_CE_BLK CRYPTO_SM4_ARM64_NEON_BLK CRYPTO_STREEBOG CRYPTO_TEA CRYPTO_TWOFISH CRYPTO_TWOFISH_COMMON CRYPTO_USER CRYPTO_USER_API_AEAD CRYPTO_USER_API_HASH CRYPTO_USER_API_SKCIPHER CRYPTO_VMAC CRYPTO_WP512 CRYPTO_XCBC CRYPTO_XCTR CYPRESS_FIRMWARE DAMON DAMON_DBGFS DAMON_PADDR DAMON_RECLAIM DAMON_VADDR DAX DCB DEFAULT_CUBIC DEFAULT_PFIFO_FAST DEVICE_MIGRATION DEVICE_PRIVATE DLN2_ADC DMABUF_HEAPS DMABUF_HEAPS_CMA DMABUF_HEAPS_SYSTEM DMABUF_MOVE_NOTIFY DM_AUDIT DM_BIO_PRISON DM_BUFIO DM_CACHE DM_CACHE_SMQ DM_CLONE 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_ANALOGIX_DP DRM_BOCHS DRM_BRIDGE DRM_CDNS_MHDP8546 DRM_CDNS_MHDP8546_J721E DRM_CIRRUS_QEMU DRM_DEBUG_MM DRM_DISPLAY_CONNECTOR DRM_DISPLAY_DP_HELPER DRM_DISPLAY_HDCP_HELPER DRM_DISPLAY_HDMI_HELPER DRM_DISPLAY_HELPER DRM_DP_AUX_BUS DRM_DW_HDMI DRM_DW_HDMI_AHB_AUDIO DRM_DW_HDMI_CEC DRM_DW_HDMI_I2S_AUDIO DRM_DW_MIPI_DSI DRM_ETNAVIV DRM_ETNAVIV_THERMAL DRM_EXYNOS DRM_EXYNOS5433_DECON DRM_EXYNOS7_DECON DRM_EXYNOS_DSI DRM_EXYNOS_HDMI DRM_EXYNOS_MIC DRM_FBDEV_EMULATION DRM_GEM_DMA_HELPER DRM_GEM_SHMEM_HELPER DRM_GM12U320 DRM_GUD DRM_HDLCD DRM_HISI_HIBMC DRM_HISI_KIRIN DRM_I2C_ADV7511 DRM_I2C_ADV7511_AUDIO DRM_I2C_ADV7511_CEC DRM_I2C_CH7006 DRM_I2C_NXP_TDA998X DRM_I2C_SIL164 DRM_IMX_DCSS DRM_KMS_HELPER DRM_KOMEDA DRM_LEGACY DRM_LIMA DRM_LONTIUM_LT8912B DRM_LONTIUM_LT9611 DRM_LONTIUM_LT9611UXC DRM_MALI_DISPLAY DRM_MEDIATEK DRM_MEDIATEK_HDMI DRM_MESON DRM_MESON_DW_HDMI DRM_MIPI_DSI DRM_MSM DRM_MSM_DP DRM_MSM_DPU DRM_MSM_DSI DRM_MSM_DSI_10NM_PHY DRM_MSM_DSI_14NM_PHY DRM_MSM_DSI_20NM_PHY DRM_MSM_DSI_28NM_8960_PHY DRM_MSM_DSI_28NM_PHY DRM_MSM_DSI_7NM_PHY DRM_MSM_GPU_STATE DRM_MSM_HDMI DRM_MSM_HDMI_HDCP DRM_MSM_MDP4 DRM_MSM_MDP5 DRM_MSM_MDSS DRM_MXS DRM_MXSFB DRM_NOMODESET DRM_NOUVEAU DRM_NOUVEAU_BACKLIGHT DRM_NWL_MIPI_DSI DRM_PANEL DRM_PANEL_BOE_TV101WUM_NL6 DRM_PANEL_BRIDGE DRM_PANEL_EDP DRM_PANEL_LVDS DRM_PANEL_MANTIX_MLAF057WE51 DRM_PANEL_RAYDIUM_RM67191 DRM_PANEL_SIMPLE DRM_PANEL_SITRONIX_ST7703 DRM_PANEL_TRULY_NT35597_WQXGA DRM_PANFROST DRM_PARADE_PS8640 DRM_PL111 DRM_RCAR_CMM DRM_RCAR_DU DRM_RCAR_DW_HDMI DRM_RCAR_LVDS DRM_RCAR_MIPI_DSI DRM_RCAR_USE_CMM DRM_RCAR_USE_LVDS DRM_RCAR_USE_MIPI_DSI DRM_RCAR_VSP DRM_RCAR_WRITEBACK DRM_SCHED DRM_SII902X DRM_SIMPLEDRM DRM_SIMPLE_BRIDGE DRM_SUN4I DRM_SUN6I_DSI DRM_SUN8I_DW_HDMI DRM_SUN8I_MIXER DRM_SUN8I_TCON_TOP DRM_TEGRA ENCRYPTED_KEYS FSCACHE HAMRADIO HID_DRAGONRISE HID_NINTENDO HSR INFINIBAND INFINIBAND_ADDR_TRANS INFINIBAND_RTRS_CLIENT INFINIBAND_USER_ACCESS INPUT_JOYSTICK INPUT_MOUSE IOSCHED_BFQ IP6_NF_RAW IPV6_MULTIPLE_TABLES IP_ADVANCED_ROUTER IP_MULTIPLE_TABLES IP_NF_RAW IP_SET ISDN ISDN_CAPI ISO9660_FS JFFS2_FS JFFS2_LZO JFFS2_RTIME JFFS2_RUBIN JFFS2_SUMMARY JFFS2_ZLIB JFS_DEBUG JFS_FS JFS_POSIX_ACL JFS_SECURITY JOLIET 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 L2TP L2TP_ETH L2TP_IP L2TP_V3 LAPB LAPBETHER LDM_PARTITION LEDS_TRIGGER_AUDIO LLC2 LOGIG940_FF LOGIRUMBLEPAD2_FF LOGITECH_FF LOGIWHEELS_FF LOGO_LINUX_MONO LOGO_LINUX_VGA16 LPC_ICH LWTUNNEL LWTUNNEL_BPF LZ4HC_COMPRESS LZ4_COMPRESS MAC80211 MAC80211_DEBUGFS MAC80211_HAS_RC MAC80211_HWSIM MAC80211_LEDS MAC80211_MESH MAC80211_RC_DEFAULT_MINSTREL MAC80211_RC_MINSTREL MACSEC MAC_PARTITION MDIO_MVUSB MD_LINEAR MD_MULTIPATH MD_RAID0 MD_RAID1 MD_RAID10 MD_RAID456 MEDIA_CONTROLLER_DVB MEDIA_RADIO_SUPPORT MEDIA_TUNER_MSI001 MEMORY_HOTPLUG_DEFAULT_ONLINE MEMSTICK MEMSTICK_REALTEK_USB MFD_DLN2 MHI_WWAN_CTRL MINIX_FS MINIX_SUBPARTITION MISC_RTSX MISC_RTSX_USB MISDN MISDN_DSP MISDN_HFCUSB MISDN_L1OIP MKISS MLX4_INFINIBAND MMC_REALTEK_USB MMC_USHC MMC_VUB300 MODULE_FORCE_UNLOAD MODULE_SRCVERSION_ALL MODVERSIONS MOST MOST_USB_HDM MOUSE_APPLETOUCH MOUSE_BCM5974 MOUSE_PS2 MOUSE_PS2_ALPS MOUSE_PS2_BYD MOUSE_PS2_CYPRESS MOUSE_PS2_FOCALTECH 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 MSDOS_FS MTD_BLOCK2MTD MTD_MTDRAM MTD_PHRAM MTD_SLRAM MUSB_PIO_ONLY NETCONSOLE NETDEVSIM NETFILTER_FAMILY_ARP NETFILTER_NETLINK NETFILTER_NETLINK_ACCT NETFILTER_NETLINK_GLUE_CT NETFILTER_NETLINK_LOG NETFILTER_NETLINK_OSF NETFILTER_NETLINK_QUEUE NETFILTER_SYNPROXY 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 NETFILTER_XT_MATCH_HASHLIMIT NETFILTER_XT_MATCH_HELPER NETFILTER_XT_MATCH_HL NETFILTER_XT_MATCH_IPCOMP NETFILTER_XT_MATCH_IPRANGE NETFILTER_XT_MATCH_L2TP NETFILTER_XT_MATCH_LENGTH NETFILTER_XT_MATCH_LIMIT NETFILTER_XT_MATCH_MAC NETFILTER_XT_MATCH_MARK NETFILTER_XT_MATCH_MULTIPORT NETFILTER_XT_MATCH_NFACCT NETFILTER_XT_MATCH_OSF NETFILTER_XT_MATCH_OWNER NETFILTER_XT_MATCH_PHYSDEV NETFILTER_XT_MATCH_PKTTYPE NETFILTER_XT_MATCH_POLICY NETFILTER_XT_MATCH_QUOTA NETFILTER_XT_MATCH_RATEEST NETFILTER_XT_MATCH_REALM NETFILTER_XT_MATCH_RECENT NETFILTER_XT_MATCH_SCTP NETFILTER_XT_MATCH_SOCKET NETFILTER_XT_MATCH_STATE NETFILTER_XT_MATCH_STATISTIC NETFILTER_XT_MATCH_STRING NETFILTER_XT_MATCH_TCPMSS NETFILTER_XT_MATCH_TIME NETFILTER_XT_MATCH_U32 NETFILTER_XT_SET NETFILTER_XT_TARGET_AUDIT NETFILTER_XT_TARGET_CLASSIFY NETFILTER_XT_TARGET_CONNMARK NETFILTER_XT_TARGET_CONNSECMARK NETFILTER_XT_TARGET_CT NETFILTER_XT_TARGET_DSCP NETFILTER_XT_TARGET_HL NETFILTER_XT_TARGET_HMARK NETFILTER_XT_TARGET_IDLETIMER NETFILTER_XT_TARGET_LED NETFILTER_XT_TARGET_MARK NETFILTER_XT_TARGET_NETMAP NETFILTER_XT_TARGET_NFLOG NETFILTER_XT_TARGET_NFQUEUE NETFILTER_XT_TARGET_NOTRACK NETFILTER_XT_TARGET_RATEEST NETFILTER_XT_TARGET_REDIRECT NETFILTER_XT_TARGET_SECMARK NETFILTER_XT_TARGET_TCPMSS NETFILTER_XT_TARGET_TCPOPTSTRIP NETFILTER_XT_TARGET_TEE NETFILTER_XT_TARGET_TPROXY NETFILTER_XT_TARGET_TRACE NETLABEL NETLINK_DIAG NETPOLL NETROM NETWORK_SECMARK NET_9P_RDMA NET_ACT_BPF NET_ACT_CONNMARK NET_ACT_CSUM NET_ACT_CT NET_ACT_CTINFO NET_ACT_IFE NET_ACT_IPT NET_ACT_MPLS NET_ACT_NAT NET_ACT_PEDIT NET_ACT_POLICE NET_ACT_SAMPLE NET_ACT_SIMP NET_ACT_SKBEDIT NET_ACT_SKBMOD NET_ACT_TUNNEL_KEY NET_ACT_VLAN NET_CLS_BPF NET_CLS_CGROUP NET_CLS_FLOW NET_CLS_FW NET_CLS_MATCHALL NET_CLS_ROUTE4 NET_CLS_U32 NET_DSA_TAG_MTK NET_DSA_TAG_QCA NET_DSA_TAG_RTL4_A NET_EMATCH NET_EMATCH_CANID NET_EMATCH_CMP NET_EMATCH_IPSET NET_EMATCH_IPT NET_EMATCH_META NET_EMATCH_NBYTE NET_EMATCH_TEXT NET_EMATCH_U32 NET_FC NET_FOU NET_FOU_IP_TUNNELS NET_IFE NET_IFE_SKBMARK NET_IFE_SKBPRIO NET_IFE_SKBTCINDEX NET_IPGRE NET_IPGRE_BROADCAST NET_IPGRE_DEMUX NET_IPIP NET_IPVTI NET_KEY NET_KEY_MIGRATE NET_L3_MASTER_DEV NET_MPLS_GSO NET_NCSI NET_NSH NET_POLL_CONTROLLER NET_REDIRECT NET_SCH_CAKE NET_SCH_CHOKE NET_SCH_CODEL NET_SCH_DEFAULT NET_SCH_DRR NET_SCH_ETS NET_SCH_FQ NET_SCH_FQ_CODEL NET_SCH_FQ_PIE NET_SCH_GRED NET_SCH_HFSC NET_SCH_HHF NET_SCH_HTB NET_SCH_MULTIQ NET_SCH_NETEM NET_SCH_PIE NET_SCH_PLUG NET_SCH_PRIO NET_SCH_QFQ NET_SCH_RED NET_SCH_SFB NET_SCH_SFQ NET_SCH_SKBPRIO NET_SCH_TBF NET_SCH_TEQL NET_TC_SKB_EXT NET_TEAM NET_TEAM_MODE_ACTIVEBACKUP NET_TEAM_MODE_BROADCAST NET_TEAM_MODE_LOADBALANCE NET_TEAM_MODE_RANDOM NET_TEAM_MODE_ROUNDROBIN NET_UDP_TUNNEL NET_VRF NFC_DIGITAL NFC_FDP NFC_HCI NFC_MRVL NFC_MRVL_USB NFC_NCI_UART NFC_PN533 NFC_PN533_USB NFC_PORT100 NFC_SHDLC NFC_SIM NFC_VIRTUAL_NCI NFSD NFSD_BLOCKLAYOUT NFSD_FLEXFILELAYOUT NFSD_PNFS NFSD_SCSILAYOUT NFSD_V3_ACL NFSD_V4 NFSD_V4_2_INTER_SSC NFSD_V4_SECURITY_LABEL NFS_ACL_SUPPORT NFS_FSCACHE NFS_V3_ACL NFS_V4_2_READ_PLUS NFT_BRIDGE_META NFT_BRIDGE_REJECT NFT_COMPAT NFT_CONNLIMIT NFT_CT NFT_DUP_IPV4 NFT_DUP_IPV6 NFT_DUP_NETDEV NFT_FIB NFT_FIB_INET NFT_FIB_IPV4 NFT_FIB_IPV6 NFT_FIB_NETDEV NFT_FLOW_OFFLOAD NFT_HASH NFT_LIMIT NFT_LOG NFT_MASQ NFT_NAT NFT_NUMGEN NFT_OSF NFT_QUEUE NFT_QUOTA NFT_REDIR NFT_REJECT NFT_REJECT_INET NFT_REJECT_IPV4 NFT_REJECT_IPV6 NFT_REJECT_NETDEV NFT_SOCKET NFT_SYNPROXY NFT_TPROXY NFT_TUNNEL NFT_XFRM NF_CONNTRACK_AMANDA NF_CONNTRACK_BRIDGE NF_CONNTRACK_BROADCAST NF_CONNTRACK_H323 NF_CONNTRACK_IRC NF_CONNTRACK_LABELS NF_CONNTRACK_MARK NF_CONNTRACK_NETBIOS_NS NF_CONNTRACK_PPTP NF_CONNTRACK_SANE NF_CONNTRACK_SECMARK NF_CONNTRACK_SNMP NF_CONNTRACK_TFTP NF_CONNTRACK_TIMEOUT NF_CONNTRACK_TIMESTAMP NF_CONNTRACK_ZONES NF_CT_NETLINK NF_CT_NETLINK_HELPER NF_CT_NETLINK_TIMEOUT NF_CT_PROTO_GRE NF_DUP_IPV4 NF_DUP_IPV6 NF_DUP_NETDEV NF_FLOW_TABLE NF_FLOW_TABLE_INET NF_LOG_ARP NF_NAT_AMANDA NF_NAT_FTP NF_NAT_H323 NF_NAT_IRC NF_NAT_PPTP NF_NAT_REDIRECT NF_NAT_SIP NF_NAT_SNMP_BASIC NF_NAT_TFTP NF_SOCKET_IPV4 NF_SOCKET_IPV6 NF_TABLES NF_TABLES_ARP NF_TABLES_BRIDGE NF_TABLES_INET NF_TABLES_IPV4 NF_TABLES_IPV6 NF_TABLES_NETDEV NF_TPROXY_IPV4 NF_TPROXY_IPV6 NILFS2_FS NINTENDO_FF NLMON NLS_ASCII NLS_CODEPAGE_1250 NLS_CODEPAGE_1251 NLS_CODEPAGE_737 NLS_CODEPAGE_775 NLS_CODEPAGE_850 NLS_CODEPAGE_852 NLS_CODEPAGE_855 NLS_CODEPAGE_857 NLS_CODEPAGE_860 NLS_CODEPAGE_861 NLS_CODEPAGE_862 NLS_CODEPAGE_863 NLS_CODEPAGE_864 NLS_CODEPAGE_865 NLS_CODEPAGE_866 NLS_CODEPAGE_869 NLS_CODEPAGE_874 NLS_CODEPAGE_932 NLS_CODEPAGE_936 NLS_CODEPAGE_949 NLS_CODEPAGE_950 NLS_ISO8859_13 NLS_ISO8859_14 NLS_ISO8859_15 NLS_ISO8859_2 NLS_ISO8859_3 NLS_ISO8859_4 NLS_ISO8859_5 NLS_ISO8859_6 NLS_ISO8859_7 NLS_ISO8859_8 NLS_ISO8859_9 NLS_KOI8_R NLS_KOI8_U NLS_MAC_CELTIC NLS_MAC_CENTEURO NLS_MAC_CROATIAN NLS_MAC_CYRILLIC NLS_MAC_GAELIC NLS_MAC_GREEK NLS_MAC_ICELAND NLS_MAC_INUIT NLS_MAC_ROMAN NLS_MAC_ROMANIAN NLS_MAC_TURKISH NLS_UTF8 NOUVEAU_LEGACY_CTX_SUPPORT NOUVEAU_PLATFORM_DRIVER NOZOMI NO_HZ NTFS3_FS NTFS3_FS_POSIX_ACL NTFS3_LZX_XPRESS NTFS_FS NTFS_RW NULL_TTY NVME_FABRICS NVME_FC NVME_MULTIPATH NVME_RDMA NVME_TARGET NVME_TARGET_FC NVME_TARGET_FCLOOP NVME_TARGET_LOOP NVME_TARGET_RDMA NVME_TARGET_TCP NVME_TCP N_GSM N_HDLC OCFS2_DEBUG_FS OCFS2_FS OCFS2_FS_O2CB OCFS2_FS_STATS PARTITION_ADVANCED PCCARD PCMCIA PSAMPLE RFKILL SERIAL_NONSTANDARD SND SND_SOC SOUND TCP_CONG_ADVANCED TLS TLS_DEVICE TRUSTED_KEYS WAN WATCH_QUEUE WEXT_CORE WIRELESS WIRELESS_EXT WLAN WLAN_VENDOR_ATH WWAN X25 XFRM ZONE_DEVICE] disabling configs for [bug_or_warning locking atomic_sleep hang memleak ubsan], they are not needed testing current HEAD 090666d3cc906176fc47363520eb746b94c7d578 testing commit 090666d3cc906176fc47363520eb746b94c7d578 gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: a63e453094c6a575e1c3d407a0c01514669c8f90edb7bcbc7a2fd18eb61d3bde all runs: crashed: KASAN: use-after-free Read in release_metapage representative crash: KASAN: use-after-free Read in release_metapage, types: [KASAN-USE-AFTER-FREE-READ] crash still not fixed/happens on the oldest tested release revisions tested: 8, total time: 3h28m38.980696264s (build: 1h56m18.880958869s, test: 1h12m33.983759117s) crash still not fixed or there were kernel test errors commit msg: Linux 6.1.177 crash: KASAN: use-after-free Read in release_metapage ERROR: (device loop0): release_metapage: write_one_page() failed ERROR: (device loop0): remounting filesystem as read-only ================================================================== BUG: KASAN: use-after-free in drop_metapage fs/jfs/jfs_metapage.c:223 [inline] BUG: KASAN: use-after-free in release_metapage+0x6b8/0xb64 fs/jfs/jfs_metapage.c:757 Read of size 8 at addr ffff0000cfff9408 by task syz.0.17/5165 CPU: 1 PID: 5165 Comm: syz.0.17 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 Call trace: dump_backtrace+0x1c4/0x1f0 arch/arm64/kernel/stacktrace.c:158 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165 __dump_stack+0x30/0x40 lib/dump_stack.c:88 dump_stack_lvl+0xac/0xf0 lib/dump_stack.c:106 print_address_description+0x88/0x218 mm/kasan/report.c:316 print_report+0x50/0x68 mm/kasan/report.c:420 kasan_report+0xa8/0xf8 mm/kasan/report.c:524 __asan_report_load8_noabort+0x2c/0x38 mm/kasan/report_generic.c:351 drop_metapage fs/jfs/jfs_metapage.c:223 [inline] release_metapage+0x6b8/0xb64 fs/jfs/jfs_metapage.c:757 write_metapage fs/jfs/jfs_metapage.h:75 [inline] flush_metapage fs/jfs/jfs_metapage.h:81 [inline] ea_put fs/jfs/xattr.c:623 [inline] __jfs_setxattr+0xc20/0xfd8 fs/jfs/xattr.c:792 __jfs_xattr_set+0xe4/0x17c fs/jfs/xattr.c:941 jfs_xattr_set+0x58/0x70 fs/jfs/xattr.c:965 __vfs_setxattr+0x374/0x390 fs/xattr.c:182 __vfs_setxattr_noperm+0x120/0x56c fs/xattr.c:216 __vfs_setxattr_locked+0x1e8/0x214 fs/xattr.c:277 vfs_setxattr+0x158/0x2a8 fs/xattr.c:309 do_setxattr fs/xattr.c:594 [inline] setxattr+0x258/0x2d8 fs/xattr.c:617 path_setxattr+0x130/0x260 fs/xattr.c:636 __do_sys_lsetxattr fs/xattr.c:659 [inline] __se_sys_lsetxattr fs/xattr.c:655 [inline] __arm64_sys_lsetxattr+0xc4/0xe0 fs/xattr.c:655 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x24c arch/arm64/kernel/syscall.c:140 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204 el0_svc+0x34/0xc4 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Allocated by task 5165: kasan_save_stack mm/kasan/common.c:46 [inline] kasan_set_track+0x4c/0x80 mm/kasan/common.c:53 kasan_save_alloc_info+0x24/0x30 mm/kasan/generic.c:505 __kasan_slab_alloc+0x70/0x88 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook+0x70/0x32c mm/slab.h:737 slab_alloc_node mm/slub.c:3359 [inline] slab_alloc mm/slub.c:3367 [inline] __kmem_cache_alloc_lru mm/slub.c:3374 [inline] kmem_cache_alloc+0x248/0x314 mm/slub.c:3383 mempool_alloc_slab+0x58/0x74 mm/mempool.c:532 mempool_alloc+0x110/0x3a4 mm/mempool.c:412 alloc_metapage fs/jfs/jfs_metapage.c:176 [inline] __get_metapage+0x54c/0xdc4 fs/jfs/jfs_metapage.c:651 ea_get+0x7f0/0xdcc fs/jfs/xattr.c:528 __jfs_setxattr+0x46c/0xfd8 fs/jfs/xattr.c:727 __jfs_xattr_set+0xe4/0x17c fs/jfs/xattr.c:941 jfs_xattr_set+0x58/0x70 fs/jfs/xattr.c:965 __vfs_setxattr+0x374/0x390 fs/xattr.c:182 __vfs_setxattr_noperm+0x120/0x56c fs/xattr.c:216 __vfs_setxattr_locked+0x1e8/0x214 fs/xattr.c:277 vfs_setxattr+0x158/0x2a8 fs/xattr.c:309 do_setxattr fs/xattr.c:594 [inline] setxattr+0x258/0x2d8 fs/xattr.c:617 path_setxattr+0x130/0x260 fs/xattr.c:636 __do_sys_lsetxattr fs/xattr.c:659 [inline] __se_sys_lsetxattr fs/xattr.c:655 [inline] __arm64_sys_lsetxattr+0xc4/0xe0 fs/xattr.c:655 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x24c arch/arm64/kernel/syscall.c:140 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204 el0_svc+0x34/0xc4 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Freed by task 5166: kasan_save_stack mm/kasan/common.c:46 [inline] kasan_set_track+0x4c/0x80 mm/kasan/common.c:53 kasan_save_free_info+0x38/0x5c mm/kasan/generic.c:516 ____kasan_slab_free+0x148/0x1b0 mm/kasan/common.c:237 __kasan_slab_free+0x18/0x28 mm/kasan/common.c:245 kasan_slab_free include/linux/kasan.h:177 [inline] slab_free_hook mm/slub.c:1729 [inline] slab_free_freelist_hook+0x16c/0x1e8 mm/slub.c:1755 slab_free mm/slub.c:3687 [inline] kmem_cache_free+0xd8/0x2d8 mm/slub.c:3709 mempool_free_slab+0x28/0x38 mm/mempool.c:539 mempool_free+0xc0/0x2e4 mm/mempool.c:521 free_metapage fs/jfs/jfs_metapage.c:191 [inline] metapage_release_folio+0x438/0x5a4 fs/jfs/jfs_metapage.c:551 filemap_release_folio+0x174/0x24c mm/filemap.c:4026 mapping_evict_folio+0x1a8/0x264 mm/truncate.c:303 invalidate_mapping_pagevec+0x260/0x428 mm/truncate.c:552 invalidate_mapping_pages+0x38/0x4c mm/truncate.c:591 drop_pagecache_sb+0x158/0x1f8 fs/drop_caches.c:39 iterate_supers+0x11c/0x1d4 fs/super.c:757 drop_caches_sysctl_handler+0xb8/0x300 fs/drop_caches.c:62 proc_sys_call_handler+0x400/0x690 fs/proc/proc_sysctl.c:602 proc_sys_write+0x2c/0x3c fs/proc/proc_sysctl.c:628 do_iter_readv_writev fs/read_write.c:-1 [inline] do_iter_write+0x520/0x93c fs/read_write.c:861 vfs_iter_write+0x88/0xac fs/read_write.c:902 iter_file_splice_write+0x528/0xa38 fs/splice.c:685 do_splice_from fs/splice.c:763 [inline] direct_splice_actor+0xe4/0x138 fs/splice.c:950 splice_direct_to_actor+0x39c/0x93c fs/splice.c:896 do_splice_direct+0x168/0x25c fs/splice.c:1002 do_sendfile+0x460/0xc8c fs/read_write.c:1255 __do_sys_sendfile64 fs/read_write.c:1317 [inline] __se_sys_sendfile64 fs/read_write.c:1309 [inline] __arm64_sys_sendfile64+0x200/0x354 fs/read_write.c:1309 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x24c arch/arm64/kernel/syscall.c:140 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204 el0_svc+0x34/0xc4 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 The buggy address belongs to the object at ffff0000cfff93e0 which belongs to the cache jfs_mp of size 184 The buggy address is located 40 bytes inside of 184-byte region [ffff0000cfff93e0, ffff0000cfff9498) The buggy address belongs to the physical page: page:00000000567acf24 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10fff9 flags: 0x5ffc00000000200(slab|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000000200 0000000000000000 dead000000000122 ffff0000c5c82a80 raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000cfff9300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff0000cfff9380: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb >ffff0000cfff9400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff0000cfff9480: fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000cfff9500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== syz.0.17 (5165): drop_caches: 1 syz.0.17 (5165): drop_caches: 1