ci2 starts bisection 2025-09-14 09:14:05.593832269 +0000 UTC m=+223157.468647396 bisecting fixing commit since f7347f4005727f3155551c0550f4deb9c40b56c2 building syzkaller on cc4a4020ecb6d62110981f597feea0c04a643efa ensuring issue is reproducible on original commit f7347f4005727f3155551c0550f4deb9c40b56c2 testing commit f7347f4005727f3155551c0550f4deb9c40b56c2 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 53a68da6234efc20a21742e8017c3f302d7b068dbab324094a317bb3d08a7e5b all runs: crashed: unregister_netdevice: waiting for DEV to become free representative crash: unregister_netdevice: waiting for DEV to become free, types: [DoS] check whether we can drop unnecessary instrumentation disabling configs for [bug_or_warning kasan locking atomic_sleep hang memleak ubsan], they are not needed testing commit f7347f4005727f3155551c0550f4deb9c40b56c2 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: f7a5b837b88f47fc4bb44e475b738012fa7dd5920e671c6a4c38baa24103f9ff run #0: crashed: unregister_netdevice: waiting for DEV to become free run #1: crashed: unregister_netdevice: waiting for DEV to become free run #2: crashed: unregister_netdevice: waiting for DEV to become free run #3: crashed: unregister_netdevice: waiting for DEV to become free run #4: crashed: unregister_netdevice: waiting for DEV to become free run #5: crashed: unregister_netdevice: waiting for DEV to become free run #6: crashed: unregister_netdevice: waiting for DEV to become free run #7: crashed: unregister_netdevice: waiting for DEV to become free run #8: crashed: unregister_netdevice: waiting for DEV to become free run #9: OK representative crash: unregister_netdevice: waiting for DEV to become free, types: [DoS] the bug reproduces without the instrumentation disabling configs for [bug_or_warning kasan locking atomic_sleep hang memleak ubsan], they are not needed kconfig minimization: base=3707 full=7266 leaves diff=1985 split chunks (needed=false): <1985> split chunk #0 of len 1985 into 5 parts testing without sub-chunk 1/5 disabling configs for [ubsan bug_or_warning kasan locking atomic_sleep hang memleak], they are not needed testing commit f7347f4005727f3155551c0550f4deb9c40b56c2 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 3b59e461d80b20709be190deae65644dbd8bc411211c49616315d929140dca70 all runs: crashed: unregister_netdevice: waiting for DEV to become free representative crash: unregister_netdevice: waiting for DEV to become free, types: [DoS] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [hang memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed testing commit f7347f4005727f3155551c0550f4deb9c40b56c2 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 576156d66775df65b7b26ab3234d2e592870a3c840641da527463d76e2406fbe all runs: crashed: unregister_netdevice: waiting for DEV to become free representative crash: unregister_netdevice: waiting for DEV to become free, types: [DoS] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep hang], they are not needed testing commit f7347f4005727f3155551c0550f4deb9c40b56c2 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 11e797f7436ba223f44f54e9f1b2db026fae59cd1493c92a001ca5d03c6a8db1 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 kasan], they are not needed testing commit f7347f4005727f3155551c0550f4deb9c40b56c2 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: cf05e628b08aaf2382c7b4c9b23402025b44dddd63fc164cfd0b2686515147c4 run #0: crashed: unregister_netdevice: waiting for DEV to become free run #1: crashed: unregister_netdevice: waiting for DEV to become free run #2: crashed: unregister_netdevice: waiting for DEV to become free run #3: crashed: unregister_netdevice: waiting for DEV to become free run #4: crashed: unregister_netdevice: waiting for DEV to become free run #5: crashed: unregister_netdevice: waiting for DEV to become free run #6: crashed: unregister_netdevice: waiting for DEV to become free run #7: crashed: unregister_netdevice: waiting for DEV to become free run #8: OK run #9: OK representative crash: unregister_netdevice: waiting for DEV to become free, types: [DoS] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep hang], they are not needed testing commit f7347f4005727f3155551c0550f4deb9c40b56c2 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 2f290e6f2ef1d3ea86143a86f92e73be13b18ae86841410e4a57648ce923f56f run #0: crashed: unregister_netdevice: waiting for DEV to become free run #1: crashed: unregister_netdevice: waiting for DEV to become free run #2: crashed: unregister_netdevice: waiting for DEV to become free run #3: crashed: unregister_netdevice: waiting for DEV to become free run #4: crashed: unregister_netdevice: waiting for DEV to become free run #5: crashed: unregister_netdevice: waiting for DEV to become free run #6: crashed: unregister_netdevice: waiting for DEV to become free run #7: crashed: unregister_netdevice: waiting for DEV to become free run #8: crashed: unregister_netdevice: waiting for DEV to become free run #9: OK representative crash: unregister_netdevice: waiting for DEV to become free, types: [DoS] the chunk can be dropped minimized to 397 configs; suspects: [AX25 BRIDGE BRIDGE_NETFILTER CAN CFG80211 CHECKPOINT_RESTORE DVB_CORE FB FSCACHE HAMRADIO HSR INFINIBAND INFINIBAND_ADDR_TRANS INFINIBAND_USER_ACCESS INPUT_JOYSTICK INPUT_MOUSE IP6_NF_RAW IPV6_MULTIPLE_TABLES IP_NF_RAW IP_SET IP_VS ISDN 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_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_INTEL KVM_MMIO KVM_VFIO KVM_XEN KVM_XFER_TO_GUEST_WORK L2TP L2TP_ETH L2TP_IP L2TP_V3 LAPB LAPBETHER LDM_PARTITION LD_IS_BFD LEDS_TRIGGER_AUDIO LEGACY_PTYS LIBNVDIMM LINEAR_RANGES LLC LLC2 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 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 MEDIA_TUNER_XC2028 MEDIA_TUNER_XC5000 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 MKISS MLX4_CORE MLX4_INFINIBAND MMC MMC_REALTEK_USB MMC_USHC MMC_VUB300 MMU_NOTIFIER MODULE_SRCVERSION_ALL MODVERSIONS MOST 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_BLK ND_BTT ND_CLAIM ND_PFN NETDEVSIM NETFILTER_ADVANCED NETFILTER_FAMILY_ARP NETFILTER_FAMILY_BRIDGE NETFILTER_NETLINK_ACCT NETFILTER_NETLINK_GLUE_CT 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_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 NETFS_SUPPORT 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_CGROUP 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_EGRESS 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_ATM NET_SCH_CAKE NET_SCH_CBQ NET_SCH_CBS NET_SCH_CHOKE NET_SCH_CODEL NET_SCH_DRR NET_SCH_DSMARK 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_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_V2_ACL NFSD_V3 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_COUNTER 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_OBJREF 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_PPTP NF_CONNTRACK_SANE NF_CONNTRACK_SNMP 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_DUP_IPV6 NF_DUP_NETDEV NF_FLOW_TABLE NF_FLOW_TABLE_INET NF_FLOW_TABLE_IPV4 NF_FLOW_TABLE_IPV6 NF_NAT_AMANDA NF_NAT_H323 NF_NAT_PPTP NF_NAT_REDIRECT 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 NLMON NLS_CODEPAGE_1250 NLS_CODEPAGE_1251 NLS_CODEPAGE_737 PARTITION_ADVANCED PSAMPLE RFKILL SPI USB_GADGET USB_MUSB_HDRC VIDEO_DEV VIDEO_V4L2 WAN WATCH_QUEUE WIRELESS WLAN WWAN X25 X86_X32] disabling configs for [hang memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed determining the merge base between f7347f4005727f3155551c0550f4deb9c40b56c2 and f83a4f2a4d8c485922fba3018a64fc8f4cfd315f 8bb7eca972ad531c9b149c0a51ab43a417385813/Linux 5.15 is a merge base, check if it has the bug testing commit 8bb7eca972ad531c9b149c0a51ab43a417385813 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 1c897803f380da43f12df01623feb89f3afc56ea88c1cc59c36b504d5eb88264 run #0: crashed: unregister_netdevice: waiting for DEV to become free run #1: crashed: unregister_netdevice: waiting for DEV to become free run #2: crashed: unregister_netdevice: waiting for DEV to become free run #3: crashed: unregister_netdevice: waiting for DEV to become free run #4: crashed: unregister_netdevice: waiting for DEV to become free run #5: crashed: unregister_netdevice: waiting for DEV to become free run #6: crashed: unregister_netdevice: waiting for DEV to become free run #7: OK run #8: OK run #9: OK representative crash: unregister_netdevice: waiting for DEV to become free, types: [DoS] testing current HEAD f83a4f2a4d8c485922fba3018a64fc8f4cfd315f testing commit f83a4f2a4d8c485922fba3018a64fc8f4cfd315f gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: a8ca68aaaa4a5528ffa31fc5460e9254af5de1abd58b227e19826f1655266363 all runs: OK false negative chance: 0.000 # git bisect start f83a4f2a4d8c485922fba3018a64fc8f4cfd315f 8bb7eca972ad531c9b149c0a51ab43a417385813 Bisecting: 169305 revisions left to test after this (roughly 17 steps) [57ac7ff8cb4d30fbb91d4ac1d44aa35c22bb8d52] Merge tag 'backlight-next-6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight determine whether the revision contains the guilty commit revision 8bb7eca972ad531c9b149c0a51ab43a417385813 crashed and is reachable testing commit 57ac7ff8cb4d30fbb91d4ac1d44aa35c22bb8d52 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 failed building 57ac7ff8cb4d30fbb91d4ac1d44aa35c22bb8d52: ./include/linux/vmstat.h:508:43: error: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Werror,-Wenum-enum-conversion] ./include/linux/vmstat.h:515:43: error: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Werror,-Wenum-enum-conversion] ./include/linux/vmstat.h:522:36: error: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Werror,-Wenum-enum-conversion] ./include/linux/vmstat.h:527:43: error: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Werror,-Wenum-enum-conversion] ./include/linux/vmstat.h:536:43: error: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Werror,-Wenum-enum-conversion] # git bisect skip 57ac7ff8cb4d30fbb91d4ac1d44aa35c22bb8d52 Bisecting: 169143 revisions left to test after this (roughly 17 steps) [7ba2090ca64ea1aa435744884124387db1fac70f] Merge tag 'ceph-for-6.6-rc1' of https://github.com/ceph/ceph-client determine whether the revision contains the guilty commit revision 8bb7eca972ad531c9b149c0a51ab43a417385813 crashed and is reachable testing commit 7ba2090ca64ea1aa435744884124387db1fac70f gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 failed building 7ba2090ca64ea1aa435744884124387db1fac70f: ./include/linux/vmstat.h:508:43: error: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Werror,-Wenum-enum-conversion] 536 | re./include/linux/vmstat.h:515:43: error: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Werror,-Wenum-enum-conversion] :In file included from 522:36: error: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Werror,-Wenum-enum-conversion] In file included from ./include/linux/perf_event.h:18./include/linux/vmstat.h:527:43: error: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Werror,-Wenum-enum-conversion] ./include/linux/vmstat.h:536:43: error: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Werror,-Wenum-enum-conversion] ../include/linux/vmstat.h:515:43: error: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Werror,-Wenum-enum-conversion] ./include/linux/vmstat.h:522:36: error: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Werror,-Wenum-enum-conversion] ./include/linux/vmstat.h:527:43: error: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Werror,-Wenum-enum-conversion] ./include/linux/vmstat.h:515:43: error: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Werror,-Wenum-enum-conversion] # git bisect skip 7ba2090ca64ea1aa435744884124387db1fac70f Bisecting: 169143 revisions left to test after this (roughly 17 steps) [9013c51c630ac5a046aa2d51d67e966b6185f1cd] vfs: mostly undo glibc turning 'fstat()' into 'fstatat(AT_EMPTY_PATH)' determine whether the revision contains the guilty commit revision 7ba2090ca64ea1aa435744884124387db1fac70f crashed and is reachable testing commit 9013c51c630ac5a046aa2d51d67e966b6185f1cd gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 failed building 9013c51c630ac5a046aa2d51d67e966b6185f1cd: ./include/linux/vmstat.h:508:43: error: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Werror,-Wenum-enum-conversion] ./include/linux/vmstat.h:515:43: error: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Werror,-Wenum-enum-conversion] ./include/linux/vmstat.h:522:36: error: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Werror,-Wenum-enum-conversion] ./include/linux/vmstat.h:527:43: error: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Werror,-Wenum-enum-conversion] ./include/linux/vmstat.h:536:43: error: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Werror,-Wenum-enum-conversion] # git bisect skip 9013c51c630ac5a046aa2d51d67e966b6185f1cd Bisecting: 169143 revisions left to test after this (roughly 17 steps) [24388292e2d7fae79a0d4183cc91716b851299cf] x86/decompressor: Move global symbol references to C code determine whether the revision contains the guilty commit revision 8bb7eca972ad531c9b149c0a51ab43a417385813 crashed and is reachable testing commit 24388292e2d7fae79a0d4183cc91716b851299cf gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 0d64d991acaa070ec157c8314f2f8ffa6c77a194ef568a125cfd6b59e8ab4b42 run #0: crashed: unregister_netdevice: waiting for DEV to become free run #1: crashed: unregister_netdevice: waiting for DEV to become free run #2: crashed: unregister_netdevice: waiting for DEV to become free run #3: crashed: unregister_netdevice: waiting for DEV to become free run #4: crashed: unregister_netdevice: waiting for DEV to become free run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK representative crash: unregister_netdevice: waiting for DEV to become free, types: [DoS] # git bisect good 24388292e2d7fae79a0d4183cc91716b851299cf Bisecting: 91009 revisions left to test after this (roughly 17 steps) [3f386cb8ee9f04ff4be164ca7a1d0ef3f81f7374] Merge tag 'pci-v6.11-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci determine whether the revision contains the guilty commit revision 57ac7ff8cb4d30fbb91d4ac1d44aa35c22bb8d52 crashed and is reachable testing commit 3f386cb8ee9f04ff4be164ca7a1d0ef3f81f7374 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 158521f6bc33200d5d9a648e1ab23638c9a3e42f2bdde33afa7ad163082c3ea4 run #0: crashed: unregister_netdevice: waiting for DEV to become free run #1: crashed: unregister_netdevice: waiting for DEV to become free run #2: crashed: unregister_netdevice: waiting for DEV to become free run #3: crashed: unregister_netdevice: waiting for DEV to become free run #4: crashed: unregister_netdevice: waiting for DEV to become free run #5: crashed: unregister_netdevice: waiting for DEV to become free run #6: crashed: unregister_netdevice: waiting for DEV to become free run #7: OK run #8: OK run #9: OK representative crash: unregister_netdevice: waiting for DEV to become free, types: [DoS] # git bisect good 3f386cb8ee9f04ff4be164ca7a1d0ef3f81f7374 Bisecting: 45504 revisions left to test after this (roughly 16 steps) [32119a07c94a41be8ab02b259dbc8404541232f9] drm/i915/bios: fix a comment referencing struct drm_i915_private determine whether the revision contains the guilty commit revision 3f386cb8ee9f04ff4be164ca7a1d0ef3f81f7374 crashed and is reachable testing commit 32119a07c94a41be8ab02b259dbc8404541232f9 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: a8f4982ea24abd4fcf8dd0c6e239090c088e6c964f6195911d17a555579ae5ef run #0: crashed: unregister_netdevice: waiting for DEV to become free run #1: crashed: unregister_netdevice: waiting for DEV to become free run #2: crashed: unregister_netdevice: waiting for DEV to become free run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: crashed: unregister_netdevice: waiting for DEV to become free run #9: OK representative crash: unregister_netdevice: waiting for DEV to become free, types: [DoS] # git bisect good 32119a07c94a41be8ab02b259dbc8404541232f9 Bisecting: 22113 revisions left to test after this (roughly 15 steps) [1b98f357dadd6ea613a435fbaef1a5dd7b35fd21] Merge tag 'net-next-6.16' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next determine whether the revision contains the guilty commit revision 3f386cb8ee9f04ff4be164ca7a1d0ef3f81f7374 crashed and is reachable testing commit 1b98f357dadd6ea613a435fbaef1a5dd7b35fd21 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: ff2a9bd9b99b9666c498d89b12195e9962299e53e1d3bec1fd3c785602fd674e all runs: OK false negative chance: 0.000 # git bisect bad 1b98f357dadd6ea613a435fbaef1a5dd7b35fd21 Bisecting: 11612 revisions left to test after this (roughly 14 steps) [eb0ece16027f8223d5dc9aaf90124f70577bd22a] Merge tag 'mm-stable-2025-03-30-16-52' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm determine whether the revision contains the guilty commit revision 8bb7eca972ad531c9b149c0a51ab43a417385813 crashed and is reachable testing commit eb0ece16027f8223d5dc9aaf90124f70577bd22a gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: bec400f8ea2468743b71d584f17261947a4aab016609371af6fd32f881149574 all runs: OK false negative chance: 0.000 # git bisect bad eb0ece16027f8223d5dc9aaf90124f70577bd22a Bisecting: 6662 revisions left to test after this (roughly 13 steps) [e61f33273ca755b3e2ebee4520a76097199dc7a8] Merge tag 'zstd-linus-v6.15-rc1' of https://github.com/terrelln/linux determine whether the revision contains the guilty commit revision 3f386cb8ee9f04ff4be164ca7a1d0ef3f81f7374 crashed and is reachable testing commit e61f33273ca755b3e2ebee4520a76097199dc7a8 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: de5e3b48854222a1e6398166146f1967d5cb7b6746fb108b6c1e5cdee1184027 run #0: crashed: unregister_netdevice: waiting for DEV to become free run #1: crashed: unregister_netdevice: waiting for DEV to become free run #2: crashed: unregister_netdevice: waiting for DEV to become free run #3: crashed: unregister_netdevice: waiting for DEV to become free run #4: crashed: unregister_netdevice: waiting for DEV to become free run #5: crashed: unregister_netdevice: waiting for DEV to become free run #6: crashed: unregister_netdevice: waiting for DEV to become free run #7: crashed: unregister_netdevice: waiting for DEV to become free run #8: crashed: unregister_netdevice: waiting for DEV to become free run #9: crashed: unregister_netdevice: waiting for DEV to become free run #10: crashed: unregister_netdevice: waiting for DEV to become free run #11: crashed: unregister_netdevice: waiting for DEV to become free run #12: crashed: unregister_netdevice: waiting for DEV to become free run #13: crashed: unregister_netdevice: waiting for DEV to become free run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: crashed: unregister_netdevice: waiting for DEV to become free representative crash: unregister_netdevice: waiting for DEV to become free, types: [DoS] # git bisect good e61f33273ca755b3e2ebee4520a76097199dc7a8 Bisecting: 3330 revisions left to test after this (roughly 12 steps) [a10c7949adf94356e56d5c8878f6fc3f25bd0c15] Merge tag 'linux_kselftest-kunit-6.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest determine whether the revision contains the guilty commit revision e61f33273ca755b3e2ebee4520a76097199dc7a8 crashed and is reachable testing commit a10c7949adf94356e56d5c8878f6fc3f25bd0c15 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 5bc30b8c9ec082dd18b8402165308b45b990010cc93f714943a8f468fbdd1801 all runs: OK false negative chance: 0.000 # git bisect bad a10c7949adf94356e56d5c8878f6fc3f25bd0c15 Bisecting: 1626 revisions left to test after this (roughly 11 steps) [1952e19c02ae8ea0c663d30b19be14344b543068] Merge tag 'wireless-next-2025-03-20' of https://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless-next determine whether the revision contains the guilty commit revision 3f386cb8ee9f04ff4be164ca7a1d0ef3f81f7374 crashed and is reachable testing commit 1952e19c02ae8ea0c663d30b19be14344b543068 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 93f68c02914345126caf48c98cc93495cbcda27b86b12fbc323809baa990a11d run #0: crashed: unregister_netdevice: waiting for DEV to become free run #1: crashed: unregister_netdevice: waiting for DEV to become free run #2: crashed: unregister_netdevice: waiting for DEV to become free run #3: crashed: unregister_netdevice: waiting for DEV to become free run #4: crashed: unregister_netdevice: waiting for DEV to become free run #5: crashed: unregister_netdevice: waiting for DEV to become free run #6: crashed: unregister_netdevice: waiting for DEV to become free run #7: crashed: unregister_netdevice: waiting for DEV to become free run #8: crashed: unregister_netdevice: waiting for DEV to become free run #9: crashed: unregister_netdevice: waiting for DEV to become free run #10: crashed: unregister_netdevice: waiting for DEV to become free run #11: crashed: unregister_netdevice: waiting for DEV to become free run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: crashed: unregister_netdevice: waiting for DEV to become free representative crash: unregister_netdevice: waiting for DEV to become free, types: [DoS] # git bisect good 1952e19c02ae8ea0c663d30b19be14344b543068 Bisecting: 764 revisions left to test after this (roughly 10 steps) [a9fc2304972b1db28b88af8203dffef23e1e92ba] Merge tag 'soc-drivers-6.15-1' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc determine whether the revision contains the guilty commit revision 1952e19c02ae8ea0c663d30b19be14344b543068 crashed and is reachable testing commit a9fc2304972b1db28b88af8203dffef23e1e92ba gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: fef4d7227228ea576b5c86acf2b763545ec8a8d17752375c734352417a99b7cb all runs: OK false negative chance: 0.000 # git bisect bad a9fc2304972b1db28b88af8203dffef23e1e92ba Bisecting: 430 revisions left to test after this (roughly 9 steps) [35759662efffbf7b32fd2b14609fb301f40c73f5] Merge tag 'ti-k3-dt-for-v6.15' of https://git.kernel.org/pub/scm/linux/kernel/git/ti/linux into soc/dt determine whether the revision contains the guilty commit revision 8bb7eca972ad531c9b149c0a51ab43a417385813 crashed and is reachable testing commit 35759662efffbf7b32fd2b14609fb301f40c73f5 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 439bff371cc7655fd40337c29d6ca8d1b428a37e8d24ce1f21ca5041baf16284 run #0: crashed: unregister_netdevice: waiting for DEV to become free run #1: crashed: unregister_netdevice: waiting for DEV to become free run #2: crashed: unregister_netdevice: waiting for DEV to become free run #3: crashed: unregister_netdevice: waiting for DEV to become free run #4: crashed: unregister_netdevice: waiting for DEV to become free run #5: crashed: unregister_netdevice: waiting for DEV to become free run #6: crashed: unregister_netdevice: waiting for DEV to become free run #7: crashed: unregister_netdevice: waiting for DEV to become free run #8: crashed: unregister_netdevice: waiting for DEV to become free run #9: crashed: unregister_netdevice: waiting for DEV to become free run #10: crashed: unregister_netdevice: waiting for DEV to become free run #11: crashed: unregister_netdevice: waiting for DEV to become free run #12: OK run #13: OK run #14: crashed: unregister_netdevice: waiting for DEV to become free run #15: OK run #16: OK run #17: crashed: unregister_netdevice: waiting for DEV to become free run #18: OK run #19: OK representative crash: unregister_netdevice: waiting for DEV to become free, types: [DoS] # git bisect good 35759662efffbf7b32fd2b14609fb301f40c73f5 Bisecting: 261 revisions left to test after this (roughly 8 steps) [1a9239bb4253f9076b5b4b2a1a4e8d7defd77a95] Merge tag 'net-next-6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next determine whether the revision contains the guilty commit revision 8bb7eca972ad531c9b149c0a51ab43a417385813 crashed and is reachable testing commit 1a9239bb4253f9076b5b4b2a1a4e8d7defd77a95 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: dc227d93de8b8bee6c92a61343388cbb2774a4f67f1510730b8db40a0b33604d all runs: OK false negative chance: 0.000 # git bisect bad 1a9239bb4253f9076b5b4b2a1a4e8d7defd77a95 Bisecting: 105 revisions left to test after this (roughly 6 steps) [b6f61a312a77c20e6ecb1e84fa1e68abcc2ed2de] Merge branch 'net-tn40xx-add-support-for-aqr105-based-cards' determine whether the revision contains the guilty commit revision 8bb7eca972ad531c9b149c0a51ab43a417385813 crashed and is reachable testing commit b6f61a312a77c20e6ecb1e84fa1e68abcc2ed2de gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 510230f71100df6bc2d8d6aec01557513e7367544cae03c2a94ec3df78edafe2 run #0: crashed: unregister_netdevice: waiting for DEV to become free run #1: crashed: unregister_netdevice: waiting for DEV to become free run #2: crashed: unregister_netdevice: waiting for DEV to become free run #3: crashed: unregister_netdevice: waiting for DEV to become free run #4: crashed: unregister_netdevice: waiting for DEV to become free run #5: crashed: unregister_netdevice: waiting for DEV to become free run #6: crashed: unregister_netdevice: waiting for DEV to become free run #7: crashed: unregister_netdevice: waiting for DEV to become free run #8: crashed: unregister_netdevice: waiting for DEV to become free run #9: crashed: unregister_netdevice: waiting for DEV to become free run #10: crashed: unregister_netdevice: waiting for DEV to become free run #11: OK run #12: OK run #13: crashed: unregister_netdevice: waiting for DEV to become free run #14: OK run #15: crashed: unregister_netdevice: waiting for DEV to become free run #16: OK run #17: OK run #18: OK run #19: OK representative crash: unregister_netdevice: waiting for DEV to become free, types: [DoS] # git bisect good b6f61a312a77c20e6ecb1e84fa1e68abcc2ed2de Bisecting: 52 revisions left to test after this (roughly 6 steps) [eed14eb510c040a3826b633048244bb7a816c67d] Bluetooth: MGMT: Add LL Privacy Setting determine whether the revision contains the guilty commit revision 7ba2090ca64ea1aa435744884124387db1fac70f crashed and is reachable testing commit eed14eb510c040a3826b633048244bb7a816c67d gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 5afc8e67e24db37156c57310f0a8abc91cf4065be90effc5c56db1c7d60c7cc0 run #0: crashed: unregister_netdevice: waiting for DEV to become free run #1: crashed: unregister_netdevice: waiting for DEV to become free run #2: crashed: unregister_netdevice: waiting for DEV to become free run #3: crashed: unregister_netdevice: waiting for DEV to become free run #4: crashed: unregister_netdevice: waiting for DEV to become free run #5: crashed: unregister_netdevice: waiting for DEV to become free run #6: crashed: unregister_netdevice: waiting for DEV to become free run #7: crashed: unregister_netdevice: waiting for DEV to become free run #8: crashed: unregister_netdevice: waiting for DEV to become free run #9: OK run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: crashed: unregister_netdevice: waiting for DEV to become free run #18: OK run #19: OK representative crash: unregister_netdevice: waiting for DEV to become free, types: [DoS] # git bisect good eed14eb510c040a3826b633048244bb7a816c67d Bisecting: 26 revisions left to test after this (roughly 5 steps) [cec7dde2a926b496b3227ee59973b298cf76cc2a] Merge branch 'mlx5-misc-fixes-2025-03-18' determine whether the revision contains the guilty commit revision 8bb7eca972ad531c9b149c0a51ab43a417385813 crashed and is reachable testing commit cec7dde2a926b496b3227ee59973b298cf76cc2a gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 1155c58989421854ba998ca7bb02b3c8f4f3a607961e042ce4152f21535dcc94 all runs: OK false negative chance: 0.000 # git bisect bad cec7dde2a926b496b3227ee59973b298cf76cc2a Bisecting: 12 revisions left to test after this (roughly 4 steps) [f85c69369854a43af2c5d3b3896da0908d713133] net: dsa: mv88e6xxx: enable PVT for 6321 switch determine whether the revision contains the guilty commit revision 3f386cb8ee9f04ff4be164ca7a1d0ef3f81f7374 crashed and is reachable testing commit f85c69369854a43af2c5d3b3896da0908d713133 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 9a3a3d23442f3da931bf296f8ea436196d8721435b091080c018d0ef66562aa2 all runs: OK false negative chance: 0.000 # git bisect bad f85c69369854a43af2c5d3b3896da0908d713133 Bisecting: 5 revisions left to test after this (roughly 3 steps) [3865bec60683b86d39a5d8d6c34a1d269adaa84c] net/mlx5e: Fix ethtool -N flow-type ip4 to RSS context determine whether the revision contains the guilty commit revision 57ac7ff8cb4d30fbb91d4ac1d44aa35c22bb8d52 crashed and is reachable testing commit 3865bec60683b86d39a5d8d6c34a1d269adaa84c gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: cad8bdfd53c7e42094abcd150591aaf89865c1f469739a5b00b9f27c5f33f08b 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 run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK false negative chance: 0.000 # git bisect bad 3865bec60683b86d39a5d8d6c34a1d269adaa84c Bisecting: 2 revisions left to test after this (roughly 2 steps) [2f6efbabceb6b2914ee9bafb86d9a51feae9cce8] ax25: Remove broken autobind determine whether the revision contains the guilty commit revision 3f386cb8ee9f04ff4be164ca7a1d0ef3f81f7374 crashed and is reachable testing commit 2f6efbabceb6b2914ee9bafb86d9a51feae9cce8 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 0b5fef429c6896e9f45b3047e8f5a627a9050c2c7455c390c85d83c016cadbde all runs: OK false negative chance: 0.000 # git bisect bad 2f6efbabceb6b2914ee9bafb86d9a51feae9cce8 Bisecting: 1 revision left to test after this (roughly 1 step) [919f9f497dbcee75d487400e8f9815b74a6a37df] eth: bnxt: fix out-of-range access of vnic_info array determine whether the revision contains the guilty commit revision 57ac7ff8cb4d30fbb91d4ac1d44aa35c22bb8d52 crashed and is reachable testing commit 919f9f497dbcee75d487400e8f9815b74a6a37df gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: d0e5e2cd21499bc839b0f98dd26050e01e3a7469eec3926236d96d3546ead853 run #0: crashed: unregister_netdevice: waiting for DEV to become free run #1: crashed: unregister_netdevice: waiting for DEV to become free run #2: crashed: unregister_netdevice: waiting for DEV to become free run #3: crashed: unregister_netdevice: waiting for DEV to become free run #4: crashed: unregister_netdevice: waiting for DEV to become free run #5: crashed: unregister_netdevice: waiting for DEV to become free run #6: crashed: unregister_netdevice: waiting for DEV to become free run #7: crashed: unregister_netdevice: waiting for DEV to become free run #8: OK run #9: OK run #10: crashed: unregister_netdevice: waiting for DEV to become free run #11: crashed: unregister_netdevice: waiting for DEV to become free run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: unregister_netdevice: waiting for DEV to become free, types: [DoS] # git bisect good 919f9f497dbcee75d487400e8f9815b74a6a37df Bisecting: 0 revisions left to test after this (roughly 0 steps) [ed3ba9b6e280e14cc3148c1b226ba453f02fa76c] net: Remove RTNL dance for SIOCBRADDIF and SIOCBRDELIF. determine whether the revision contains the guilty commit revision 8bb7eca972ad531c9b149c0a51ab43a417385813 crashed and is reachable testing commit ed3ba9b6e280e14cc3148c1b226ba453f02fa76c gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 412e20e068b16399081b8754eb656bd00dc8a9f31d2ccc6745d0d49c39c40ce0 all runs: OK false negative chance: 0.000 # git bisect bad ed3ba9b6e280e14cc3148c1b226ba453f02fa76c ed3ba9b6e280e14cc3148c1b226ba453f02fa76c is the first bad commit commit ed3ba9b6e280e14cc3148c1b226ba453f02fa76c Author: Kuniyuki Iwashima Date: Sun Mar 16 12:28:37 2025 -0700 net: Remove RTNL dance for SIOCBRADDIF and SIOCBRDELIF. SIOCBRDELIF is passed to dev_ioctl() first and later forwarded to br_ioctl_call(), which causes unnecessary RTNL dance and the splat below [0] under RTNL pressure. Let's say Thread A is trying to detach a device from a bridge and Thread B is trying to remove the bridge. In dev_ioctl(), Thread A bumps the bridge device's refcnt by netdev_hold() and releases RTNL because the following br_ioctl_call() also re-acquires RTNL. In the race window, Thread B could acquire RTNL and try to remove the bridge device. Then, rtnl_unlock() by Thread B will release RTNL and wait for netdev_put() by Thread A. Thread A, however, must hold RTNL after the unlock in dev_ifsioc(), which may take long under RTNL pressure, resulting in the splat by Thread B. Thread A (SIOCBRDELIF) Thread B (SIOCBRDELBR) ---------------------- ---------------------- sock_ioctl sock_ioctl `- sock_do_ioctl `- br_ioctl_call `- dev_ioctl `- br_ioctl_stub |- rtnl_lock | |- dev_ifsioc ' ' |- dev = __dev_get_by_name(...) |- netdev_hold(dev, ...) . / |- rtnl_unlock ------. | | |- br_ioctl_call `---> |- rtnl_lock Race | | `- br_ioctl_stub |- br_del_bridge Window | | | |- dev = __dev_get_by_name(...) | | | May take long | `- br_dev_delete(dev, ...) | | | under RTNL pressure | `- unregister_netdevice_queue(dev, ...) | | | | `- rtnl_unlock \ | |- rtnl_lock <-' `- netdev_run_todo | |- ... `- netdev_run_todo | `- rtnl_unlock |- __rtnl_unlock | |- netdev_wait_allrefs_any |- netdev_put(dev, ...) <----------------' Wait refcnt decrement and log splat below To avoid blocking SIOCBRDELBR unnecessarily, let's not call dev_ioctl() for SIOCBRADDIF and SIOCBRDELIF. In the dev_ioctl() path, we do the following: 1. Copy struct ifreq by get_user_ifreq in sock_do_ioctl() 2. Check CAP_NET_ADMIN in dev_ioctl() 3. Call dev_load() in dev_ioctl() 4. Fetch the master dev from ifr.ifr_name in dev_ifsioc() 3. can be done by request_module() in br_ioctl_call(), so we move 1., 2., and 4. to br_ioctl_stub(). Note that 2. is also checked later in add_del_if(), but it's better performed before RTNL. SIOCBRADDIF and SIOCBRDELIF have been processed in dev_ioctl() since the pre-git era, and there seems to be no specific reason to process them there. [0]: unregister_netdevice: waiting for wpan3 to become free. Usage count = 2 ref_tracker: wpan3@ffff8880662d8608 has 1/1 users at __netdev_tracker_alloc include/linux/netdevice.h:4282 [inline] netdev_hold include/linux/netdevice.h:4311 [inline] dev_ifsioc+0xc6a/0x1160 net/core/dev_ioctl.c:624 dev_ioctl+0x255/0x10c0 net/core/dev_ioctl.c:826 sock_do_ioctl+0x1ca/0x260 net/socket.c:1213 sock_ioctl+0x23a/0x6c0 net/socket.c:1318 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] __se_sys_ioctl fs/ioctl.c:892 [inline] __x64_sys_ioctl+0x1a4/0x210 fs/ioctl.c:892 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcb/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Fixes: 893b19587534 ("net: bridge: fix ioctl locking") Reported-by: syzkaller Reported-by: yan kang Reported-by: yue sun Closes: https://lore.kernel.org/netdev/SY8P300MB0421225D54EB92762AE8F0F2A1D32@SY8P300MB0421.AUSP300.PROD.OUTLOOK.COM/ Signed-off-by: Kuniyuki Iwashima Acked-by: Stanislav Fomichev Reviewed-by: Ido Schimmel Acked-by: Nikolay Aleksandrov Link: https://patch.msgid.link/20250316192851.19781-1-kuniyu@amazon.com Signed-off-by: Paolo Abeni include/linux/if_bridge.h | 6 ++---- net/bridge/br_ioctl.c | 36 +++++++++++++++++++++++++++++++++--- net/bridge/br_private.h | 3 +-- net/core/dev_ioctl.c | 19 ------------------- net/socket.c | 19 +++++++++---------- 5 files changed, 45 insertions(+), 38 deletions(-) accumulated error probability: 0.00 culprit signature: 412e20e068b16399081b8754eb656bd00dc8a9f31d2ccc6745d0d49c39c40ce0 parent signature: d0e5e2cd21499bc839b0f98dd26050e01e3a7469eec3926236d96d3546ead853 reproducer is flaky (0.51 repro chance estimate) revisions tested: 28, total time: 9h53m48.977636776s (build: 2h40m19.950464794s, test: 6h30m6.600216028s) first good commit: ed3ba9b6e280e14cc3148c1b226ba453f02fa76c net: Remove RTNL dance for SIOCBRADDIF and SIOCBRDELIF. recipients (to): ["idosch@nvidia.com" "kuniyu@amazon.com" "pabeni@redhat.com" "razor@blackwall.org" "sdf@fomichev.me"] recipients (cc): []