ci2 starts bisection 2026-07-01 10:38:29.398277247 +0000 UTC m=+30985.890219768 bisecting fixing commit since f2ddafa93a259310ca47507153b7811ec54ab7fd building syzkaller on 0199f9a13cef46cb5197b1be05347de27bd3bc10 ensuring issue is reproducible on original commit f2ddafa93a259310ca47507153b7811ec54ab7fd testing commit f2ddafa93a259310ca47507153b7811ec54ab7fd gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: c9ae80e4a5f0389c20a043c1f250b4e890c42ff5985fbd10cc97fc8775fbdb86 all runs: crashed: BUG: unable to handle kernel paging request in nilfs_mdt_save_to_shadow_map representative crash: BUG: unable to handle kernel paging request in nilfs_mdt_save_to_shadow_map, types: [MEMORY_SAFETY_BUG] check whether we can drop unnecessary instrumentation disabling configs for [atomic_sleep hang memleak ubsan kasan locking], they are not needed testing commit f2ddafa93a259310ca47507153b7811ec54ab7fd gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: f7155fba99c98084412c293382335b423283784bfd47f808c17fc3a7a9b6225a all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in nilfs_mdt_save_to_shadow_map representative crash: BUG: unable to handle kernel NULL pointer dereference in nilfs_mdt_save_to_shadow_map, types: [NULL-POINTER-DEREFERENCE] the bug reproduces without the instrumentation disabling configs for [hang memleak ubsan kasan locking atomic_sleep], they are not needed kconfig minimization: base=7505 full=9786 leaves diff=2008 split chunks (needed=false): <2008> split chunk #0 of len 2008 into 5 parts testing without sub-chunk 1/5 disabling configs for [atomic_sleep hang memleak ubsan kasan locking], they are not needed testing commit f2ddafa93a259310ca47507153b7811ec54ab7fd gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: fab07a576363a623591540ddcb1c17a3941c1426ebb9fc062a2e7d0324028da8 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in nilfs_mdt_save_to_shadow_map representative crash: BUG: unable to handle kernel NULL pointer dereference in nilfs_mdt_save_to_shadow_map, types: [NULL-POINTER-DEREFERENCE] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [atomic_sleep hang memleak ubsan kasan locking], they are not needed testing commit f2ddafa93a259310ca47507153b7811ec54ab7fd gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 2c9f0b4e31c55e957b08fad6f2dde51d91a32fbe7a749b34ec13e5feac25a555 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in nilfs_mdt_save_to_shadow_map representative crash: BUG: unable to handle kernel NULL pointer dereference in nilfs_mdt_save_to_shadow_map, types: [NULL-POINTER-DEREFERENCE] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [ubsan kasan locking atomic_sleep hang memleak], they are not needed testing commit f2ddafa93a259310ca47507153b7811ec54ab7fd gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 2b089d1e67e263739340722b6295422a568802e76bef14232fc03a06067f2012 all runs: OK false negative chance: 0.000 testing without sub-chunk 4/5 disabling configs for [kasan locking atomic_sleep hang memleak ubsan], they are not needed testing commit f2ddafa93a259310ca47507153b7811ec54ab7fd gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 3aaeca8c2df97b9a252f484766e226e569a879c4cfbf0ad30a1fe46edcb52b70 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in nilfs_mdt_save_to_shadow_map representative crash: BUG: unable to handle kernel NULL pointer dereference in nilfs_mdt_save_to_shadow_map, types: [NULL-POINTER-DEREFERENCE] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [kasan locking atomic_sleep hang memleak ubsan], they are not needed testing commit f2ddafa93a259310ca47507153b7811ec54ab7fd gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: f3df91cf95185a92b7596b60cf07a54444b97aae1af81631a5184b8fca9b2987 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in nilfs_mdt_save_to_shadow_map representative crash: BUG: unable to handle kernel NULL pointer dereference in nilfs_mdt_save_to_shadow_map, types: [NULL-POINTER-DEREFERENCE] the chunk can be dropped minimized to 402 configs; suspects: [AX25 CFG80211 DLM 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_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 OCFS2_FS_USERSPACE_CLUSTER PARTITION_ADVANCED PSAMPLE RFKILL SERIAL_NONSTANDARD WAN WATCH_QUEUE WIRELESS WLAN WWAN X25 XFRM] disabling configs for [memleak ubsan kasan locking atomic_sleep hang], they are not needed testing current HEAD fdb6fcb41cc741ad5eaa7995f278dfcb94fdf795 testing commit fdb6fcb41cc741ad5eaa7995f278dfcb94fdf795 gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: dd5aa47e9f0df8e04c20d43e5fae4a014d95573da287957bb402c7949bbf3c73 run #0: ignore: lost connection to test machine 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 fdb6fcb41cc741ad5eaa7995f278dfcb94fdf795 f2ddafa93a259310ca47507153b7811ec54ab7fd Bisecting: 1177 revisions left to test after this (roughly 10 steps) [24a40df79307ca7ca0eec0889361cf6ac146d72a] ALSA: usb-audio: Avoid potential endless loop in convert_chmap_v3() determine whether the revision contains the guilty commit revision f2ddafa93a259310ca47507153b7811ec54ab7fd crashed and is reachable testing commit 24a40df79307ca7ca0eec0889361cf6ac146d72a gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 0f20ab5d8b267fb1bbb2bcf840be09c1c0f8546ac52e5e71cd2524c13d809f73 run #0: ignore: lost connection to test machine 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 bad 24a40df79307ca7ca0eec0889361cf6ac146d72a Bisecting: 588 revisions left to test after this (roughly 9 steps) [4815730761b5d8710051db2178576437ddf8804e] xfs: fix ri_total validation in xlog_recover_attri_commit_pass2 determine whether the revision contains the guilty commit revision f2ddafa93a259310ca47507153b7811ec54ab7fd crashed and is reachable testing commit 4815730761b5d8710051db2178576437ddf8804e gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 1a5d6a00b1aa7224d33cb389e278a439ceb04edcecde72c1b8a85cbac6d64bcb all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in nilfs_mdt_save_to_shadow_map representative crash: BUG: unable to handle kernel NULL pointer dereference in nilfs_mdt_save_to_shadow_map, types: [NULL-POINTER-DEREFERENCE] # git bisect good 4815730761b5d8710051db2178576437ddf8804e Bisecting: 294 revisions left to test after this (roughly 8 steps) [1c43f0dd8691ddf8884793b481ddc7511cf593c3] netfilter: nft_set_pipapo_avx2: don't return non-matching entry on expiry determine whether the revision contains the guilty commit revision f2ddafa93a259310ca47507153b7811ec54ab7fd crashed and is reachable testing commit 1c43f0dd8691ddf8884793b481ddc7511cf593c3 gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: a226294139516040d9074bae020250887ae0ecbffa70a7930ea084ce8a901fb9 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in nilfs_mdt_save_to_shadow_map representative crash: BUG: unable to handle kernel NULL pointer dereference in nilfs_mdt_save_to_shadow_map, types: [NULL-POINTER-DEREFERENCE] # git bisect good 1c43f0dd8691ddf8884793b481ddc7511cf593c3 Bisecting: 147 revisions left to test after this (roughly 7 steps) [f14bd323eec4b4f0ef662520ec852e593ece1d4c] ALSA: usb-audio: stop parsing UAC2 rates at MAX_NR_RATES determine whether the revision contains the guilty commit revision f2ddafa93a259310ca47507153b7811ec54ab7fd crashed and is reachable testing commit f14bd323eec4b4f0ef662520ec852e593ece1d4c gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: d345100ecad2ebcb8592d51db3a826ddbee90f00b3b417ef438b6faac7de3ed7 all runs: OK false negative chance: 0.000 # git bisect bad f14bd323eec4b4f0ef662520ec852e593ece1d4c Bisecting: 73 revisions left to test after this (roughly 6 steps) [3f5e74b5db9353b01ed50f4de84e75b755f8fbc2] ocfs2: fix use-after-free in ocfs2_fault() when VM_FAULT_RETRY determine whether the revision contains the guilty commit revision f2ddafa93a259310ca47507153b7811ec54ab7fd crashed and is reachable testing commit 3f5e74b5db9353b01ed50f4de84e75b755f8fbc2 gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 8c618b5edb3f8c24a61f8246e8a4b8070a806c928aa53fd69e0d85ae01ecf2f9 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in nilfs_mdt_save_to_shadow_map representative crash: BUG: unable to handle kernel NULL pointer dereference in nilfs_mdt_save_to_shadow_map, types: [NULL-POINTER-DEREFERENCE] # git bisect good 3f5e74b5db9353b01ed50f4de84e75b755f8fbc2 Bisecting: 36 revisions left to test after this (roughly 5 steps) [131c0b573e1b467b7d553e9ff38003f1acd8f5f2] ocfs2: validate inline data i_size during inode read determine whether the revision contains the guilty commit revision 4815730761b5d8710051db2178576437ddf8804e crashed and is reachable testing commit 131c0b573e1b467b7d553e9ff38003f1acd8f5f2 gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: c494a92f148db3bdc708ba70df9d1f3ffc65ba32e2842d383fc456f3ce9e4724 all runs: OK false negative chance: 0.000 # git bisect bad 131c0b573e1b467b7d553e9ff38003f1acd8f5f2 Bisecting: 18 revisions left to test after this (roughly 4 steps) [ba88461f7653636c48321ca993006a74724c2f41] ALSA: 6fire: fix use-after-free on disconnect determine whether the revision contains the guilty commit revision 3f5e74b5db9353b01ed50f4de84e75b755f8fbc2 crashed and is reachable testing commit ba88461f7653636c48321ca993006a74724c2f41 gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 6d899ae795d17b3fddf84721a127d9a7e797d66e6a95ae8ff20debdf3be9db55 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in nilfs_mdt_save_to_shadow_map representative crash: BUG: unable to handle kernel NULL pointer dereference in nilfs_mdt_save_to_shadow_map, types: [NULL-POINTER-DEREFERENCE] # git bisect good ba88461f7653636c48321ca993006a74724c2f41 Bisecting: 9 revisions left to test after this (roughly 3 steps) [d1bd8b9edc6752d10f84d28ff64f842401ce336d] ipv6: add NULL checks for idev in SRv6 paths determine whether the revision contains the guilty commit revision f2ddafa93a259310ca47507153b7811ec54ab7fd crashed and is reachable testing commit d1bd8b9edc6752d10f84d28ff64f842401ce336d gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: c39e88b17316c52fb367b28617f83695ecbc36001f9b05be12d0de8d48a62192 run #0: ignore: lost connection to test machine 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 bad d1bd8b9edc6752d10f84d28ff64f842401ce336d Bisecting: 4 revisions left to test after this (roughly 2 steps) [c034d8094fee474eb94142c17643eee2919079b7] media: vidtv: fix pass-by-value structs causing MSAN warnings determine whether the revision contains the guilty commit revision 4815730761b5d8710051db2178576437ddf8804e crashed and is reachable testing commit c034d8094fee474eb94142c17643eee2919079b7 gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: c55cbec6df8b695524ec5e4df4fa127100540e13b928c608cf4ce3c036d0de73 all runs: OK false negative chance: 0.000 # git bisect bad c034d8094fee474eb94142c17643eee2919079b7 Bisecting: 1 revision left to test after this (roughly 1 step) [07ceb444c8f627cf863864d4274b5a77769725ed] media: as102: fix to not free memory after the device is registered in as102_usb_probe() determine whether the revision contains the guilty commit revision 3f5e74b5db9353b01ed50f4de84e75b755f8fbc2 crashed and is reachable testing commit 07ceb444c8f627cf863864d4274b5a77769725ed gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 9aa9ce6b4c9e2f3677ed6c43251bdbe4619ee5236ba8804a1bf717dffe2c2eb3 all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in nilfs_mdt_save_to_shadow_map representative crash: BUG: unable to handle kernel NULL pointer dereference in nilfs_mdt_save_to_shadow_map, types: [NULL-POINTER-DEREFERENCE] # git bisect good 07ceb444c8f627cf863864d4274b5a77769725ed Bisecting: 0 revisions left to test after this (roughly 0 steps) [7902b1df1520a0880bcda7a3704cfacd17905a83] nilfs2: fix NULL i_assoc_inode dereference in nilfs_mdt_save_to_shadow_map determine whether the revision contains the guilty commit revision 4815730761b5d8710051db2178576437ddf8804e crashed and is reachable testing commit 7902b1df1520a0880bcda7a3704cfacd17905a83 gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: f8721cc759262b8a4647c69c301757be0b6cafb49ef2f6647c1f2c678c56e399 all runs: OK false negative chance: 0.000 # git bisect bad 7902b1df1520a0880bcda7a3704cfacd17905a83 7902b1df1520a0880bcda7a3704cfacd17905a83 is the first bad commit commit 7902b1df1520a0880bcda7a3704cfacd17905a83 Author: Deepanshu Kartikey Date: Tue Mar 31 09:47:21 2026 +0900 nilfs2: fix NULL i_assoc_inode dereference in nilfs_mdt_save_to_shadow_map commit 4a4e0328edd9e9755843787d28f16dd4165f8b48 upstream. The DAT inode's btree node cache (i_assoc_inode) is initialized lazily during btree operations. However, nilfs_mdt_save_to_shadow_map() assumes i_assoc_inode is already initialized when copying dirty pages to the shadow map during GC. If NILFS_IOCTL_CLEAN_SEGMENTS is called immediately after mount before any btree operation has occurred on the DAT inode, i_assoc_inode is NULL leading to a general protection fault. Fix this by calling nilfs_attach_btree_node_cache() on the DAT inode in nilfs_dat_read() at mount time, ensuring i_assoc_inode is always initialized before any GC operation can use it. Reported-by: syzbot+4b4093b1f24ad789bf37@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=4b4093b1f24ad789bf37 Tested-by: syzbot+4b4093b1f24ad789bf37@syzkaller.appspotmail.com Fixes: e897be17a441 ("nilfs2: fix lockdep warnings in page operations for btree nodes") Signed-off-by: Deepanshu Kartikey Signed-off-by: Ryusuke Konishi Cc: stable@vger.kernel.org Signed-off-by: Viacheslav Dubeyko Signed-off-by: Greg Kroah-Hartman fs/nilfs2/dat.c | 3 +++ 1 file changed, 3 insertions(+) accumulated error probability: 0.00 culprit signature: f8721cc759262b8a4647c69c301757be0b6cafb49ef2f6647c1f2c678c56e399 parent signature: 9aa9ce6b4c9e2f3677ed6c43251bdbe4619ee5236ba8804a1bf717dffe2c2eb3 revisions tested: 19, total time: 6h6m3.355906319s (build: 2h57m18.168609218s, test: 2h37m33.023981243s) first good commit: 7902b1df1520a0880bcda7a3704cfacd17905a83 nilfs2: fix NULL i_assoc_inode dereference in nilfs_mdt_save_to_shadow_map recipients (to): ["gregkh@linuxfoundation.org" "kartikey406@gmail.com" "konishi.ryusuke@gmail.com" "slava@dubeyko.com" "syzbot+4b4093b1f24ad789bf37@syzkaller.appspotmail.com"] recipients (cc): []