ci2 starts bisection 2026-09-01 07:42:51.888532296 +0000 UTC m=+57176.717430426
bisecting fixing commit since da47cbc254661aa66d61ef061485a7080305c4be
building syzkaller on 76cdc0c08b54a7f468cfd4443cdbf1f8081a6f6d
ensuring issue is reproducible on original commit da47cbc254661aa66d61ef061485a7080305c4be

testing commit da47cbc254661aa66d61ef061485a7080305c4be gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 14fc4387608dc7070d4ce9e704977d3627b339a5d9556ae2e3e71a4932022a8b
run #0: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #1: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #2: crashed: KASAN: slab-out-of-bounds Read in txAllocPMap
run #3: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #4: crashed: KASAN: slab-out-of-bounds Read in txAllocPMap
run #5: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #6: crashed: KASAN: use-after-free Read in txAllocPMap
run #7: crashed: KASAN: use-after-free Read in txAllocPMap
run #8: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #9: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #10: crashed: KASAN: slab-out-of-bounds Read in txAllocPMap
run #11: crashed: KASAN: use-after-free Read in txAllocPMap
run #12: crashed: KASAN: slab-out-of-bounds Read in txAllocPMap
run #13: crashed: KASAN: use-after-free Read in txAllocPMap
run #14: crashed: KASAN: use-after-free Read in txAllocPMap
run #15: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #16: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #17: OK
run #18: OK
run #19: OK
representative crash: KASAN: slab-use-after-free Read in txAllocPMap, types: [KASAN-USE-AFTER-FREE-READ]
check whether we can drop unnecessary instrumentation
disabling configs for [locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed
testing commit da47cbc254661aa66d61ef061485a7080305c4be gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: ed9e7a7ea09c96b49d4a41f4836a680da12228069d891ecf3ca310abb06dd20d
run #0: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #1: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #2: OK
run #3: OK
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
representative crash: KASAN: slab-use-after-free Read in txAllocPMap, types: [KASAN-USE-AFTER-FREE-READ]
kconfig minimization: base=3913 full=7804 leaves diff=2164
split chunks (needed=false): <2164>
split chunk #0 of len 2164 into 5 parts
testing without sub-chunk 1/5
testing commit da47cbc254661aa66d61ef061485a7080305c4be gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: c33e7b202e9d5dc85513c228787263903fd7440ddd52773eb73400c1dab91e05
run #0: crashed: KASAN: slab-out-of-bounds Read in txAllocPMap
run #1: crashed: KASAN: use-after-free Read in txAllocPMap
run #2: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #3: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #4: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #5: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #6: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #7: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #8: crashed: KASAN: use-after-free Read in txAllocPMap
run #9: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #10: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #11: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #12: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #13: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #14: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #15: crashed: KASAN: use-after-free Read in txAllocPMap
run #16: crashed: KASAN: slab-out-of-bounds Read in txAllocPMap
run #17: crashed: KASAN: slab-out-of-bounds Read in txAllocPMap
run #18: crashed: KASAN: slab-out-of-bounds Read in txAllocPMap
run #19: crashed: KASAN: slab-out-of-bounds Read in txAllocPMap
representative crash: KASAN: use-after-free Read in txAllocPMap, types: [KASAN-USE-AFTER-FREE-READ]
the chunk can be dropped
testing without sub-chunk 2/5
testing commit da47cbc254661aa66d61ef061485a7080305c4be gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 1e7d8f7b52a77c9bbfacd5a54b4f2ff53d1c36c7f6636ab3dfe90a5a8aef2426
run #0: crashed: KASAN: use-after-free Read in txAllocPMap
run #1: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #2: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #3: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #4: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #5: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #6: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #7: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #8: crashed: KASAN: use-after-free Read in txAllocPMap
run #9: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #10: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #11: crashed: KASAN: slab-out-of-bounds Read in txAllocPMap
run #12: crashed: KASAN: use-after-free Read in txAllocPMap
run #13: crashed: KASAN: use-after-free Read in txAllocPMap
run #14: crashed: KASAN: use-after-free Read in txAllocPMap
run #15: crashed: KASAN: use-after-free Read in txAllocPMap
run #16: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #17: crashed: BUG: unable to handle kernel paging request in txAllocPMap
run #18: OK
run #19: crashed: KASAN: slab-use-after-free Read in txAllocPMap
representative crash: KASAN: use-after-free Read in txAllocPMap, types: [KASAN-USE-AFTER-FREE-READ]
the chunk can be dropped
testing without sub-chunk 3/5
testing commit da47cbc254661aa66d61ef061485a7080305c4be gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 3f0b5da0f7d4b85ed1157af675acec2682d733124517e9ebc4a156d43c9cc543
all runs: OK
false negative chance: 0.000
testing without sub-chunk 4/5
testing commit da47cbc254661aa66d61ef061485a7080305c4be gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 992048544605abfb83d9a1745341552c13f5a31ccab4e1db685afebeed88a7d0
run #0: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #1: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #2: crashed: KASAN: use-after-free Read in txAllocPMap
run #3: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #4: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #5: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #6: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #7: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #8: crashed: KASAN: slab-out-of-bounds Read in txAllocPMap
run #9: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #10: crashed: KASAN: slab-out-of-bounds Read in txAllocPMap
run #11: crashed: KASAN: slab-out-of-bounds Read in txAllocPMap
run #12: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #13: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #14: OK
run #15: OK
run #16: OK
run #17: OK
run #18: OK
run #19: crashed: KASAN: slab-use-after-free Read in txAllocPMap
representative crash: KASAN: slab-use-after-free Read in txAllocPMap, types: [KASAN-USE-AFTER-FREE-READ]
the chunk can be dropped
testing without sub-chunk 5/5
testing commit da47cbc254661aa66d61ef061485a7080305c4be gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 5dc6f3a626fccc3375b4f2a3cce69436a2ae511970b777f5d43828b172fb7619
run #0: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #1: crashed: KASAN: use-after-free Read in txAllocPMap
run #2: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #3: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #4: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #5: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #6: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #7: crashed: KASAN: slab-out-of-bounds Read in txAllocPMap
run #8: crashed: KASAN: slab-out-of-bounds Read in txAllocPMap
run #9: crashed: KASAN: slab-out-of-bounds Read in txAllocPMap
run #10: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #11: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #12: crashed: KASAN: use-after-free Read in txAllocPMap
run #13: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #14: OK
run #15: OK
run #16: OK
run #17: OK
run #18: OK
run #19: crashed: KASAN: use-after-free Read in txAllocPMap
representative crash: KASAN: slab-use-after-free Read in txAllocPMap, types: [KASAN-USE-AFTER-FREE-READ]
the chunk can be dropped
minimized to 433 configs; suspects: [AX25 BRIDGE BRIDGE_NETFILTER CAN CFG80211 CHECKPOINT_RESTORE DVB_CORE FB_CORE FSCACHE HAMRADIO HSR INFINIBAND INFINIBAND_ADDR_TRANS INFINIBAND_USER_ACCESS INPUT_JOYSTICK INPUT_MOUSE IP6_NF_RAW IPV6_MULTIPLE_TABLES 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_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 IR_IGORPLUGUSB IR_IGUANA IR_IMON IR_IMON_RAW IR_MCEUSB IR_REDRAT3 IR_STREAMZAP IR_TOY IR_TTUSBIR ISA_BUS ISDN ISDN_CAPI_MIDDLEWARE 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_COMPAT KVM_GENERIC_DIRTYLOG_READ_PROTECT KVM_GENERIC_HARDWARE_ENABLING KVM_MMIO KVM_PROVE_MMU KVM_VFIO KVM_XEN KVM_XFER_TO_GUEST_WORK L2TP L2TP_ETH L2TP_IP L2TP_V3 LAPB LAPBETHER LDM_PARTITION LEDS_TRIGGER_AUDIO LEGACY_PTYS LIBCRC32C LIBNVDIMM LINEAR_RANGES LLC LLC2 LOCALVERSION_AUTO LOGIG940_FF LOGIRUMBLEPAD2_FF LOGO LOGO_LINUX_MONO LOGO_LINUX_VGA16 LPC_ICH LWTUNNEL LWTUNNEL_BPF LZ4HC_COMPRESS LZ4_COMPRESS MAC80211 MAC80211_DEBUGFS MAC80211_HAS_RC MAC80211_HWSIM MAC80211_MESH MAC80211_RC_DEFAULT_MINSTREL MAC80211_RC_MINSTREL MACSEC MACVLAN MACVTAP MAC_PARTITION MAPPING_DIRTY_HELPERS MDIO_MVUSB MD_LINEAR MD_MULTIPATH MD_RAID0 MD_RAID1 MD_RAID10 MD_RAID456 MEDIA_ANALOG_TV_SUPPORT MEDIA_ATTACH MEDIA_CONTROLLER MEDIA_CONTROLLER_DVB MEDIA_CONTROLLER_REQUEST_API MEDIA_DIGITAL_TV_SUPPORT MEDIA_RADIO_SUPPORT MEDIA_SDR_SUPPORT MEDIA_SUPPORT MEDIA_SUPPORT_FILTER MEDIA_TUNER MEDIA_TUNER_MSI001 MEMORY_BALLOON MEMORY_HOTPLUG MEMORY_HOTPLUG_DEFAULT_ONLINE MEMORY_ISOLATION MEMREGION MEMSTICK MEMSTICK_REALTEK_USB MEM_SOFT_DIRTY MFD_CORE MFD_SYSCON MHI_BUS MHI_WWAN_CTRL MHP_MEMMAP_ON_MEMORY MICROCHIP_PHY MINIX_FS MINIX_SUBPARTITION MISC_RTSX MISC_RTSX_USB MISDN MISDN_DSP MISDN_HFCUSB MISDN_L1OIP MITIGATION_TSA MITIGATION_VMSCAPE MKISS MLX4_CORE MLX4_INFINIBAND MMC MMC_REALTEK_USB MMC_USHC MMC_VUB300 MMU_NOTIFIER 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_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 MUSB_PIO_ONLY ND_BTT ND_CLAIM ND_PFN NETDEVSIM NETFILTER_ADVANCED NETFILTER_BPF_LINK 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_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_IPVS 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_QUOTA NETFILTER_XT_MATCH_RATEEST NETFILTER_XT_MATCH_REALM NETFILTER_XT_MATCH_RECENT NETFILTER_XT_MATCH_SCTP NETFILTER_XT_MATCH_SOCKET 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_CHECKSUM NETFILTER_XT_TARGET_CLASSIFY NETFILTER_XT_TARGET_CONNMARK 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_NFQUEUE NETFILTER_XT_TARGET_NOTRACK NETFILTER_XT_TARGET_RATEEST NETFILTER_XT_TARGET_REDIRECT NETFILTER_XT_TARGET_TCPOPTSTRIP NETFILTER_XT_TARGET_TEE NETFILTER_XT_TARGET_TPROXY NETFILTER_XT_TARGET_TRACE NETLABEL NETLINK_DIAG NETROM NET_9P_RDMA NET_ACT_BPF NET_ACT_CONNMARK NET_ACT_CSUM NET_ACT_CT NET_ACT_CTINFO NET_ACT_GATE 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_BASIC NET_CLS_BPF NET_CLS_FLOW NET_CLS_FLOWER NET_CLS_FW NET_CLS_MATCHALL NET_CLS_ROUTE4 NET_DEVLINK NET_DROP_MONITOR NET_DSA NET_DSA_TAG_BRCM NET_DSA_TAG_BRCM_COMMON NET_DSA_TAG_BRCM_PREPEND NET_DSA_TAG_MTK NET_DSA_TAG_QCA NET_DSA_TAG_RTL4_A 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_REDIRECT NET_SCH_CAKE NET_SCH_CBS NET_SCH_CHOKE NET_SCH_CODEL NET_SCH_DRR NET_SCH_ETF 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_INGRESS NET_SCH_MQPRIO NET_SCH_MQPRIO_LIB 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_TAPRIO NET_SCH_TBF NET_SCH_TEQL NET_SOCK_MSG NET_SWITCHDEV 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 NFC_DIGITAL NFC_FDP NFC_HCI NFC_MRVL NFC_MRVL_USB NFC_NCI 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_FSCACHE NFS_V4_1 NFS_V4_2 NFS_V4_2_READ_PLUS NFS_V4_2_SSC_HELPER NFS_V4_SECURITY_LABEL 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_EVENTS NF_CONNTRACK_H323 NF_CONNTRACK_LABELS NF_CONNTRACK_MARK NF_CONNTRACK_NETBIOS_NS NF_CONNTRACK_OVS NF_CONNTRACK_PPTP NF_CONNTRACK_SANE NF_CONNTRACK_TFTP NF_CONNTRACK_TIMEOUT NF_CONNTRACK_TIMESTAMP NF_CONNTRACK_ZONES NF_CT_NETLINK_HELPER NF_CT_NETLINK_TIMEOUT NF_CT_PROTO_DCCP NF_CT_PROTO_GRE NF_CT_PROTO_SCTP NF_CT_PROTO_UDPLITE NF_DUP_IPV4 NF_FLOW_TABLE NF_TABLES NF_TABLES_BRIDGE NF_TABLES_INET NF_TABLES_IPV4 NF_TABLES_IPV6 NF_TABLES_NETDEV PARTITION_ADVANCED PSAMPLE RC_CORE RC_DEVICES RFKILL SPI USB_GADGET USB_MUSB_HDRC VIDEO_DEV WAN WATCH_QUEUE WIRELESS WLAN WWAN X25]
testing current HEAD a4a971135a2ff64382ae4235b3ae60503bb1036a
testing commit a4a971135a2ff64382ae4235b3ae60503bb1036a gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 90f59c0383a31e220b76406599d6b4775920b7ae6fe6147cfb62271b458037f2
run #0: crashed: KASAN: use-after-free Read in txAllocPMap
run #1: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #2: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #3: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #4: crashed: KASAN: use-after-free Read in txAllocPMap
run #5: crashed: KASAN: use-after-free Read in txAllocPMap
run #6: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #7: crashed: KASAN: slab-out-of-bounds Read in txAllocPMap
run #8: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #9: crashed: KASAN: slab-out-of-bounds Read in txAllocPMap
run #10: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #11: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #12: crashed: KASAN: slab-use-after-free Read in txAllocPMap
run #13: crashed: KASAN: slab-out-of-bounds Read in txAllocPMap
run #14: crashed: KASAN: use-after-free Read in txAllocPMap
run #15: OK
run #16: OK
run #17: OK
run #18: crashed: KASAN: slab-out-of-bounds Read in txAllocPMap
run #19: crashed: KASAN: slab-use-after-free Read in txAllocPMap
representative crash: KASAN: use-after-free Read in txAllocPMap, types: [KASAN-USE-AFTER-FREE-READ]
crash still not fixed/happens on the oldest tested release
reproducer is flaky (0.75 repro chance estimate)
revisions tested: 8, total time: 2h48m31.428547701s (build: 1h0m1.563233711s, test: 1h34m43.73240604s)
crash still not fixed or there were kernel test errors
commit msg: Linux 6.6.155
crash: KASAN: use-after-free Read in txAllocPMap
blkno = 6c00003065, nblocks = 69662f
ERROR: (device loop2): dbUpdatePMap: blocks are outside the map
==================================================================
BUG: KASAN: use-after-free in txAllocPMap+0x47f/0x6b0 fs/jfs/jfs_txnmgr.c:2412
Read of size 1 at addr ffff88812d486000 by task jfsCommit/79

CPU: 1 PID: 79 Comm: jfsCommit Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:364 [inline]
 print_report+0xa8/0x210 mm/kasan/report.c:468
 kasan_report+0x117/0x150 mm/kasan/report.c:581
 txAllocPMap+0x47f/0x6b0 fs/jfs/jfs_txnmgr.c:2412
 txUpdateMap+0x2b7/0x8b0 fs/jfs/jfs_txnmgr.c:2309
 txLazyCommit fs/jfs/jfs_txnmgr.c:2665 [inline]
 jfs_lazycommit+0x439/0xaa0 fs/jfs/jfs_txnmgr.c:2733
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </TASK>

The buggy address belongs to the physical page:
page:ffffea0004b52180 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x12d486
flags: 0x200000000000000(node=0|zone=2)
page_type: 0xffffffff()
raw: 0200000000000000 ffffea0004628a08 ffffea0004b2c808 0000000000000000
raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as freed
page last allocated via order 1, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 2072, tgid 2072 (modprobe), ts 56718449869, free_ts 140944019333
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x1c1/0x200 mm/page_alloc.c:1582
 prep_new_page mm/page_alloc.c:1589 [inline]
 get_page_from_freelist+0x22c2/0x23d0 mm/page_alloc.c:3221
 __alloc_pages+0x1f0/0x460 mm/page_alloc.c:4501
 alloc_slab_page+0x5d/0x180 mm/slub.c:1881
 allocate_slab mm/slub.c:2028 [inline]
 new_slab+0x87/0x2d0 mm/slub.c:2081
 ___slab_alloc+0xc5c/0x12f0 mm/slub.c:3253
 __slab_alloc mm/slub.c:3339 [inline]
 __slab_alloc_node mm/slub.c:3392 [inline]
 slab_alloc_node mm/slub.c:3485 [inline]
 slab_alloc mm/slub.c:3503 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3510 [inline]
 kmem_cache_alloc+0x109/0x2c0 mm/slub.c:3519
 mt_alloc_one lib/maple_tree.c:162 [inline]
 mas_alloc_nodes+0x2f8/0x8c0 lib/maple_tree.c:1267
 mas_node_count_gfp lib/maple_tree.c:1347 [inline]
 mas_preallocate+0xa1f/0x1170 lib/maple_tree.c:5535
 vma_iter_prealloc mm/internal.h:1153 [inline]
 vma_expand+0x665/0x910 mm/mmap.c:658
 __mmap_region mm/mmap.c:2756 [inline]
 mmap_region+0xc62/0x1ec0 mm/mmap.c:2941
 do_mmap+0x98f/0x10a0 mm/mmap.c:1385
 vm_mmap_pgoff+0x1c3/0x3e0 mm/util.c:556
 ksys_mmap_pgoff+0x4c9/0x720 mm/mmap.c:1431
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1182 [inline]
 free_unref_page_prepare+0x7ba/0x8d0 mm/page_alloc.c:2366
 free_unref_page+0x32/0x2b0 mm/page_alloc.c:2459
 __slab_free+0x35a/0x400 mm/slub.c:3736
 qlink_free mm/kasan/quarantine.c:166 [inline]
 qlist_free_all+0x75/0xd0 mm/kasan/quarantine.c:185
 kasan_quarantine_reduce+0x143/0x160 mm/kasan/quarantine.c:292
 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:306
 kasan_slab_alloc include/linux/kasan.h:188 [inline]
 slab_post_alloc_hook+0x6a/0x4d0 mm/slab.h:770
 slab_alloc_node mm/slub.c:3495 [inline]
 slab_alloc mm/slub.c:3503 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3510 [inline]
 kmem_cache_alloc+0x17e/0x2c0 mm/slub.c:3519
 getname_flags+0xbb/0x500 fs/namei.c:140
 getname fs/namei.c:219 [inline]
 __do_sys_rename fs/namei.c:5126 [inline]
 __se_sys_rename fs/namei.c:5124 [inline]
 __x64_sys_rename+0x5f/0x90 fs/namei.c:5124
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

Memory state around the buggy address:
 ffff88812d485f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88812d485f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88812d486000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff88812d486080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff88812d486100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================