ci2 starts bisection 2026-07-18 23:36:46.071878381 +0000 UTC m=+71985.497644270 bisecting fixing commit since 228da13e907e2b46b7222cfc35290fbfad920bef building syzkaller on 62cc6db33feb828eeda65dcf8749b4674ccd5246 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: 57ca78b75f6c6d3804ea38177031c8789caba8d957221311275b4308093a732e run #0: crashed: KASAN: use-after-free Read in txAllocPMap run #1: crashed: KASAN: slab-out-of-bounds Read in txAllocPMap run #2: crashed: KASAN: use-after-free Read in txAllocPMap run #3: crashed: KASAN: 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-out-of-bounds Read in txAllocPMap run #7: crashed: KASAN: use-after-free Read in txAllocPMap run #8: crashed: KASAN: slab-out-of-bounds Read in txAllocPMap run #9: crashed: KASAN: 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: 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: crashed: KASAN: use-after-free Read in txAllocPMap run #16: crashed: KASAN: slab-out-of-bounds Read in txAllocPMap run #17: crashed: KASAN: use-after-free Read in txAllocPMap run #18: crashed: KASAN: use-after-free 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 KASAN-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: df9190d39f6b418af11a3c62a1338bae84d94356ce1ae3281fee3cf5a30fd75a all runs: crashed: KASAN: use-after-free Read in txAllocPMap representative crash: KASAN: use-after-free Read in txAllocPMap, types: [KASAN-USE-AFTER-FREE-READ] the bug reproduces without the instrumentation disabling configs for [bug_or_warning locking atomic_sleep hang memleak ubsan], 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 [locking atomic_sleep hang memleak ubsan bug_or_warning], 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: 797a8ebc26720edbd0445f82acd25fe557f85d6c8791d1a2beccb62e2e70d016 run #0: crashed: KASAN: use-after-free Read in generic_perform_write run #1: crashed: KASAN: use-after-free Read in txAllocPMap run #2: crashed: KASAN: use-after-free Read in txAllocPMap run #3: crashed: KASAN: use-after-free Read in txAllocPMap run #4: crashed: KASAN: slab-out-of-bounds Read in txAllocPMap run #5: crashed: KASAN: 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: use-after-free Read in txAllocPMap run #9: crashed: KASAN: slab-out-of-bounds Read in txAllocPMap representative crash: KASAN: use-after-free Read in generic_perform_write, types: [KASAN-USE-AFTER-FREE-READ] the chunk can be dropped testing without sub-chunk 2/5 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: ed46a1f93cdbf85f5e69f39bbe2690c2e336502baf8d577955ff9478136491bb 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: use-after-free Read in txAllocPMap run #3: ignore: lost connection to test machine run #4: crashed: KASAN: use-after-free Read in txAllocPMap run #5: crashed: KASAN: 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: use-after-free Read in txAllocPMap run #9: crashed: KASAN: 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 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: 928f1c9142bbc3c3221c086f5e9953b42de0d6de41ef004aeafbcbc2cb38eed2 all runs: OK false negative chance: 0.000 testing without sub-chunk 4/5 disabling configs for [locking atomic_sleep hang memleak ubsan bug_or_warning], 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: 88d1573066d4526a655fc48be43829667dff30d552ef86174976f77bdad36b36 run #0: crashed: KASAN: use-after-free Read in txAllocPMap run #1: crashed: KASAN: use-after-free Read in txAllocPMap run #2: crashed: KASAN: use-after-free Read in txAllocPMap run #3: ignore: lost connection to test machine 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-out-of-bounds Read in txAllocPMap run #7: crashed: KASAN: use-after-free Read in txAllocPMap run #8: crashed: KASAN: slab-out-of-bounds Read in txAllocPMap run #9: OK representative crash: KASAN: use-after-free Read in txAllocPMap, types: [KASAN-USE-AFTER-FREE-READ] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [atomic_sleep hang memleak ubsan bug_or_warning locking], 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: 75fef1dbfe559eb8c3ff7627d0f8e11f08ec08bd5d9af3e9200cf1207cb506c3 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: use-after-free Read in txAllocPMap run #3: crashed: KASAN: use-after-free Read in txAllocPMap run #4: crashed: KASAN: slab-out-of-bounds Read in txAllocPMap run #5: crashed: KASAN: use-after-free Read in txAllocPMap run #6: crashed: KASAN: slab-out-of-bounds Read in txAllocPMap run #7: crashed: KASAN: use-after-free Read in txAllocPMap run #8: crashed: KASAN: use-after-free Read in txAllocPMap run #9: crashed: KASAN: slab-out-of-bounds Read in txAllocPMap representative crash: KASAN: use-after-free Read in txAllocPMap, types: [KASAN-USE-AFTER-FREE-READ KASAN-READ] the chunk can be dropped minimized to 402 configs; suspects: [AX25 CFG80211 DRM DRM_NOUVEAU FSCACHE HAMRADIO HID_NINTENDO HSR INFINIBAND INFINIBAND_ADDR_TRANS INFINIBAND_USER_ACCESS INPUT_JOYSTICK INPUT_MOUSE IP6_NF_RAW IPV6_MULTIPLE_TABLES IP_ADVANCED_ROUTER IP_MULTIPLE_TABLES IP_NF_RAW IP_SET ISDN 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_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 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_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_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 PSAMPLE RFKILL SERIAL_NONSTANDARD WAN WATCH_QUEUE WIRELESS WLAN WWAN X25 XFRM] disabling configs for [hang memleak ubsan bug_or_warning locking atomic_sleep], 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: 66123db99539828c20cd38d046463837320fca67b90ffbd75a4a2b24e60dae5d run #0: crashed: KASAN: use-after-free Read in txAllocPMap run #1: crashed: KASAN: use-after-free Read in txAllocPMap run #2: crashed: KASAN: use-after-free Read in txAllocPMap run #3: crashed: KASAN: use-after-free Read in txAllocPMap run #4: crashed: KASAN: slab-out-of-bounds Read in txAllocPMap run #5: crashed: KASAN: use-after-free Read in txAllocPMap run #6: crashed: KASAN: use-after-free Read in txAllocPMap run #7: crashed: KASAN: slab-out-of-bounds Read in txAllocPMap run #8: OK run #9: OK 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 revisions tested: 8, total time: 2h51m30.486725318s (build: 1h0m24.451217958s, test: 1h33m45.976418697s) crash still not fixed or there were kernel test errors commit msg: Linux 6.1.177 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+0x454/0x5e4 fs/jfs/jfs_txnmgr.c:2412 Read of size 1 at addr ffff0000cfcf4000 by task jfsCommit/72 CPU: 1 PID: 72 Comm: jfsCommit 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_load1_noabort+0x2c/0x38 mm/kasan/report_generic.c:348 txAllocPMap+0x454/0x5e4 fs/jfs/jfs_txnmgr.c:2412 txUpdateMap+0x238/0x7a0 fs/jfs/jfs_txnmgr.c:2309 txLazyCommit fs/jfs/jfs_txnmgr.c:2665 [inline] jfs_lazycommit+0x368/0x8e0 fs/jfs/jfs_txnmgr.c:2733 kthread+0x204/0x268 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850 Allocated by task 4735: 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 kmem_cache_alloc_bulk+0x33c/0x3c0 mm/slub.c:3880 mt_alloc_bulk lib/maple_tree.c:159 [inline] mas_alloc_nodes+0x370/0x714 lib/maple_tree.c:1301 mas_node_count_gfp lib/maple_tree.c:1361 [inline] mas_preallocate+0x13c/0x310 lib/maple_tree.c:5809 do_mas_align_munmap+0x1bc/0xda0 mm/mmap.c:2453 do_mas_munmap mm/mmap.c:2650 [inline] __vm_munmap+0x250/0x304 mm/mmap.c:2936 __do_sys_munmap mm/mmap.c:2961 [inline] __se_sys_munmap mm/mmap.c:2958 [inline] __arm64_sys_munmap+0x64/0x7c mm/mmap.c:2958 __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 4735: 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_bulk+0x3b4/0x468 mm/slub.c:3805 mt_free_bulk lib/maple_tree.c:164 [inline] mas_destroy+0x2288/0x2848 lib/maple_tree.c:5864 mas_store_prealloc+0x188/0x288 lib/maple_tree.c:5792 do_mas_align_munmap+0x700/0xda0 mm/mmap.c:2574 do_mas_munmap mm/mmap.c:2650 [inline] __vm_munmap+0x250/0x304 mm/mmap.c:2936 __do_sys_munmap mm/mmap.c:2961 [inline] __se_sys_munmap mm/mmap.c:2958 [inline] __arm64_sys_munmap+0x64/0x7c mm/mmap.c:2958 __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 Last potentially related work creation: kasan_save_stack+0x40/0x70 mm/kasan/common.c:46 __kasan_record_aux_stack+0xc0/0xdc mm/kasan/generic.c:486 kasan_record_aux_stack_noalloc+0x14/0x20 mm/kasan/generic.c:496 call_rcu+0xf8/0x668 kernel/rcu/tree.c:2849 ma_free_rcu lib/maple_tree.c:184 [inline] mas_free lib/maple_tree.c:1343 [inline] mas_replace+0x480/0x9c8 lib/maple_tree.c:1782 mas_wr_node_store lib/maple_tree.c:4222 [inline] mas_wr_modify+0x17c8/0x48b0 lib/maple_tree.c:4421 mas_wr_store_entry+0x930/0xd94 lib/maple_tree.c:4465 mas_store_prealloc+0x144/0x288 lib/maple_tree.c:5790 vma_mas_store mm/mmap.c:434 [inline] __mmap_region mm/mmap.c:2831 [inline] mmap_region+0x1078/0x1708 mm/mmap.c:2916 do_mmap+0x9d4/0x113c mm/mmap.c:1436 vm_mmap_pgoff+0x17c/0x21c mm/util.c:520 ksys_mmap_pgoff+0xcc/0x3d4 mm/mmap.c:1482 __do_sys_mmap arch/arm64/kernel/sys.c:28 [inline] __se_sys_mmap arch/arm64/kernel/sys.c:21 [inline] __arm64_sys_mmap+0x108/0x120 arch/arm64/kernel/sys.c:21 __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 Second to last potentially related work creation: kasan_save_stack+0x40/0x70 mm/kasan/common.c:46 __kasan_record_aux_stack+0xc0/0xdc mm/kasan/generic.c:486 kasan_record_aux_stack_noalloc+0x14/0x20 mm/kasan/generic.c:496 call_rcu+0xf8/0x668 kernel/rcu/tree.c:2849 ma_free_rcu lib/maple_tree.c:184 [inline] mas_free lib/maple_tree.c:1343 [inline] mas_replace+0x480/0x9c8 lib/maple_tree.c:1782 mas_wr_node_store lib/maple_tree.c:4222 [inline] mas_wr_modify+0x17c8/0x48b0 lib/maple_tree.c:4421 mas_wr_store_entry+0x930/0xd94 lib/maple_tree.c:4465 mas_store_prealloc+0x144/0x288 lib/maple_tree.c:5790 vma_mas_store mm/mmap.c:434 [inline] __vma_adjust+0xaec/0x164c mm/mmap.c:805 vma_adjust include/linux/mm.h:2810 [inline] __split_vma+0x328/0x44c mm/mmap.c:-1 do_mas_align_munmap+0x624/0xda0 mm/mmap.c:2501 do_mas_munmap mm/mmap.c:2650 [inline] __vm_munmap+0x250/0x304 mm/mmap.c:2936 __do_sys_munmap mm/mmap.c:2961 [inline] __se_sys_munmap mm/mmap.c:2958 [inline] __arm64_sys_munmap+0x64/0x7c mm/mmap.c:2958 __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 ffff0000cfcf4000 which belongs to the cache maple_node of size 256 The buggy address is located 0 bytes inside of 256-byte region [ffff0000cfcf4000, ffff0000cfcf4100) The buggy address belongs to the physical page: page:00000000e955357f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10fcf4 head:00000000e955357f order:1 compound_mapcount:0 compound_pincount:0 flags: 0xbff800000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 0bff800000010200 fffffc00031e1600 dead000000000002 ffff0000c000d680 raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000cfcf3f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff0000cfcf3f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff0000cfcf4000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff0000cfcf4080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000cfcf4100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== blkno = 404d7017a, nblocks = 590168 ERROR: (device loop2): dbUpdatePMap: blocks are outside the map blkno = ba0000ffff, nblocks = 7cafff ERROR: (device loop2): dbUpdatePMap: blocks are outside the map blkno = ba0000ffff, nblocks = 822fff ERROR: (device loop2): dbUpdatePMap: blocks are outside the map blkno = ba0000ffff, nblocks = 824fff ERROR: (device loop2): dbUpdatePMap: blocks are outside the map blkno = ba0000ffff, nblocks = 83afff ERROR: (device loop2): dbUpdatePMap: blocks are outside the map blkno = 407de0179, nblocks = 8c017a ERROR: (device loop2): dbUpdatePMap: blocks are outside the map