ci2 starts bisection 2026-09-30 23:26:44.424398771 +0000 UTC m=+18941.348925561 bisecting fixing commit since aabd761612dbeb7d40750d485da219d11433718a building syzkaller on 5d63f80b763910b40ae04a96c13dc75d621bea67 ensuring issue is reproducible on original commit aabd761612dbeb7d40750d485da219d11433718a testing commit aabd761612dbeb7d40750d485da219d11433718a gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: d4743cb8fefeec0f703d0b9a9694c1d4a7664b5c5d0c4ea2bc6c32cd3c99a66d all runs: crashed: UBSAN: array-index-out-of-bounds in snd_dummy_probe representative crash: UBSAN: array-index-out-of-bounds in snd_dummy_probe, types: [MEMORY_SAFETY_UBSAN] check whether we can drop unnecessary instrumentation disabling configs for [bug_or_warning kasan locking atomic_sleep hang memleak], they are not needed testing commit aabd761612dbeb7d40750d485da219d11433718a gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: bac21fce45f05fb442a5b2316bd3daa9a8cd43c6862ecd0e2d3ff3db655e9634 all runs: crashed: UBSAN: array-index-out-of-bounds in snd_dummy_probe representative crash: UBSAN: array-index-out-of-bounds in snd_dummy_probe, types: [MEMORY_SAFETY_UBSAN] the bug reproduces without the instrumentation disabling configs for [kasan locking atomic_sleep hang memleak bug_or_warning], they are not needed kconfig minimization: base=3707 full=7427 leaves diff=2100 split chunks (needed=false): <2100> split chunk #0 of len 2100 into 5 parts testing without sub-chunk 1/5 disabling configs for [atomic_sleep hang memleak bug_or_warning kasan locking], they are not needed testing commit aabd761612dbeb7d40750d485da219d11433718a gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 9aa4d82fa975605b2dfc8864e1ddfb308aff67b806325209215685a0e1c50aef all runs: crashed: UBSAN: array-index-out-of-bounds in snd_dummy_probe representative crash: UBSAN: array-index-out-of-bounds in snd_dummy_probe, types: [MEMORY_SAFETY_UBSAN] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [atomic_sleep hang memleak bug_or_warning kasan locking], they are not needed testing commit aabd761612dbeb7d40750d485da219d11433718a gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 768715548bc2d7b5aa5b4068fb6d014aca451f4507a189bc03d5e81edc4e0fac all runs: crashed: UBSAN: array-index-out-of-bounds in snd_dummy_probe representative crash: UBSAN: array-index-out-of-bounds in snd_dummy_probe, types: [MEMORY_SAFETY_UBSAN] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [hang memleak bug_or_warning kasan locking atomic_sleep], they are not needed testing commit aabd761612dbeb7d40750d485da219d11433718a gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: c0abd433f6440c3f99e43fddf5522b1fa26bdebfefc16957a85a9e4394a31851 all runs: crashed: UBSAN: array-index-out-of-bounds in snd_dummy_probe representative crash: UBSAN: array-index-out-of-bounds in snd_dummy_probe, types: [MEMORY_SAFETY_UBSAN] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [bug_or_warning kasan locking atomic_sleep hang memleak], they are not needed testing commit aabd761612dbeb7d40750d485da219d11433718a gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 2592491004f14a1776b2c758ed21642caeb74158ce11b7385618a112cdbca4f2 all runs: OK false negative chance: 0.000 testing without sub-chunk 5/5 disabling configs for [bug_or_warning kasan locking atomic_sleep hang memleak], they are not needed testing commit aabd761612dbeb7d40750d485da219d11433718a gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 64ba18a5c5af37fc695ce8c979227ea2806b635724ef9299e370cce6b6837bbe all runs: crashed: UBSAN: array-index-out-of-bounds in snd_dummy_probe representative crash: UBSAN: array-index-out-of-bounds in snd_dummy_probe, types: [MEMORY_SAFETY_UBSAN] the chunk can be dropped minimized to 420 configs; suspects: [AF_RXRPC ARCH_ENABLE_MEMORY_HOTREMOVE ASYMMETRIC_TPM_KEY_SUBTYPE ATM AX25 BXT_WC_PMIC_OPREGION CFG80211 CMA DAX DLM DVB_CORE ENCRYPTED_KEYS EXTCON GENEVE GPIOLIB HAMRADIO HID_PLAYSTATION HID_SENSOR_HUB HID_SMARTJOYPLUS HID_THRUSTMASTER IIO INFINIBAND INFINIBAND_ADDR_TRANS INFINIBAND_IPOIB INFINIBAND_USER_ACCESS INFINIBAND_VIRT_DMA INPUT_TABLET INPUT_TOUCHSCREEN INTEL_SCU_IPC INTEL_SOC_PMIC_BXTWC IP_SCTP L2TP LIBCRC32C LIBNVDIMM MEDIA_COMMON_OPTIONS MEDIA_DIGITAL_TV_SUPPORT MEDIA_PLATFORM_SUPPORT MEDIA_RADIO_SUPPORT MEDIA_SDR_SUPPORT MEDIA_SUPPORT MEDIA_USB_SUPPORT MEMORY_HOTPLUG MEMORY_HOTREMOVE MFD_DLN2 MFD_INTEL_PMC_BXT MFD_MT6360 MFD_RETU MMC MTD MTD_UBI NETFILTER_ADVANCED NETFILTER_CONNCOUNT NET_IPGRE NET_IPGRE_DEMUX NFS_V4_1 NF_CONNTRACK_SNMP NF_NAT_REDIRECT NF_NAT_SNMP_BASIC NF_NAT_TFTP NF_SOCKET_IPV4 NF_SOCKET_IPV6 NF_TABLES NF_TABLES_ARP NF_TPROXY_IPV4 NF_TPROXY_IPV6 NILFS2_FS NLMON 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 NOZOMI NTFS3_FS NTFS3_FS_POSIX_ACL NTFS3_LZX_XPRESS NTFS_FS NTFS_RW NULL_TTY NUMA_BALANCING NUMA_BALANCING_DEFAULT_ENABLED NUMA_EMU NUMA_KEEP_MEMINFO NVDIMM_DAX NVDIMM_KEYS NVDIMM_PFN NVME_CORE 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 OF_GPIO OF_PMEM OMFS_FS OPENVSWITCH OPENVSWITCH_GENEVE OPENVSWITCH_GRE OPENVSWITCH_VXLAN ORANGEFS_FS OSF_PARTITION OVERLAY_FS OVERLAY_FS_INDEX OVERLAY_FS_REDIRECT_ALWAYS_FOLLOW OVERLAY_FS_REDIRECT_DIR PACKET_DIAG PADATA PAGE_IDLE_FLAG PAGE_REPORTING PAHOLE_HAS_SPLIT_BTF PARPORT PARPORT_NOT_PC PARTITION_ADVANCED PCCARD PCCARD_NONSTATIC PCIEAER PCI_ENDPOINT PCI_IOV PCMCIA PCMCIA_LOAD_CIS PERCPU_STATS PERSISTENT_KEYRINGS PHONET PHYLINK PHY_CPCAP_USB PHY_QCOM_USB_HS PHY_QCOM_USB_HSIC PHY_SAMSUNG_USB2 PHY_TUSB1210 PKCS7_TEST_KEY PKCS8_PRIVATE_KEY_PARSER PLAYSTATION_FF PMIC_OPREGION PNFS_BLOCK PNFS_FILE_LAYOUT PNFS_FLEXFILE_LAYOUT PPP PPPOATM PPPOE PPPOL2TP PPP_ASYNC PPP_BSDCOMP PPP_DEFLATE PPP_FILTER PPP_MPPE PPP_MULTILINK PPP_SYNC_TTY PPTP PREEMPT PREEMPT_DYNAMIC PREEMPT_NOTIFIERS PREEMPT_RCU PRISM2_USB PROC_CHILDREN PROC_MEM_ALWAYS_FORCE PSI PSTORE PSTORE_842_COMPRESS PSTORE_COMPRESS PSTORE_DEFLATE_COMPRESS PSTORE_DEFLATE_COMPRESS_DEFAULT PSTORE_LZ4HC_COMPRESS PSTORE_LZ4_COMPRESS PSTORE_LZO_COMPRESS PSTORE_ZSTD_COMPRESS QCOM_QMI_HELPERS QNX4FS_FS QNX6FS_FS QRTR QRTR_TUN RADIO_ADAPTERS RADIO_SHARK RADIO_SHARK2 RADIO_TEA575X RAID6_PQ RAID_ATTRS RC_ATI_REMOTE RC_CORE RC_DEVICES RC_XBOX_DVD RDMA_RXE RDMA_SIW RDS RDS_RDMA RDS_TCP READ_ONLY_THP_FOR_FS REALTEK_AUTOPM REED_SOLOMON REED_SOLOMON_DEC8 REGMAP REGMAP_I2C REGMAP_IRQ REGMAP_MMIO REGULATOR REGULATOR_FIXED_VOLTAGE REGULATOR_TWL4030 REISERFS_FS REISERFS_FS_POSIX_ACL REISERFS_FS_SECURITY REISERFS_FS_XATTR REISERFS_PROC_INFO RESET_CONTROLLER RFKILL RFKILL_INPUT RFKILL_LEDS RMI4_2D_SENSOR RMI4_CORE RMI4_F03 RMI4_F03_SERIO RMI4_F11 RMI4_F12 RMI4_F30 ROMFS_BACKED_BY_BOTH ROMFS_FS ROMFS_ON_BLOCK ROMFS_ON_MTD ROSE RTC_DRV_HID_SENSOR_TIME RXKAD SCHED_CORE SCSI_FC_ATTRS SCSI_HPSA SCSI_ISCSI_ATTRS SCSI_LOGGING SCSI_NETLINK SCSI_SAS_ATA SCSI_SAS_ATTRS SCSI_SAS_LIBSAS SCSI_SCAN_ASYNC SCSI_SRP_ATTRS SCTP_COOKIE_HMAC_MD5 SCTP_COOKIE_HMAC_SHA1 SCTP_DEFAULT_COOKIE_HMAC_MD5 SECONDARY_TRUSTED_KEYRING SECURITY_INFINIBAND SECURITY_NETWORK_XFRM SENSORS_AQUACOMPUTER_D5NEXT SENSORS_CORSAIR_CPRO SENSORS_CORSAIR_PSU SENSORS_NZXT_KRAKEN2 SERIAL_DEV_BUS SERIAL_DEV_CTRL_TTYPORT SERIAL_MCTRL_GPIO SGI_PARTITION SIGNATURE SIGNED_PE_FILE_VERIFICATION SLHC SLIP SLIP_COMPRESSED SLIP_MODE_SLIP6 SLIP_SMART SMARTJOYPLUS_FF SMBFS_COMMON SMB_SERVER SMC SMC_DIAG SMSC_PHY SMS_SDIO_DRV SMS_SIANO_DEBUGFS SMS_SIANO_MDTV SMS_SIANO_RC SMS_USB_DRV SND SND_ALOOP SND_BCD2000 SND_CTL_LED SND_CTL_VALIDATION SND_DEBUG SND_DMA_SGBUF SND_DRIVERS SND_DUMMY SND_DYNAMIC_MINORS SND_HDA SND_HDA_CODEC_ANALOG SND_HDA_CODEC_CA0110 SND_HDA_CODEC_CA0132 SND_HDA_CODEC_CIRRUS SND_HDA_CODEC_CMEDIA SND_HDA_CODEC_CONEXANT SND_HDA_CODEC_HDMI SND_HDA_CODEC_REALTEK SND_HDA_CODEC_SI3054 SND_HDA_CODEC_SIGMATEL SND_HDA_CODEC_VIA SND_HDA_COMPONENT SND_HDA_CORE SND_HDA_GENERIC SND_HDA_GENERIC_LEDS SND_HDA_HWDEP SND_HDA_I915 SND_HDA_INPUT_BEEP SND_HDA_INTEL SND_HDA_PATCH_LOADER SND_HDA_RECONFIG SND_HRTIMER SND_HWDEP SND_INTEL_DSP_CONFIG SND_INTEL_NHLT SND_INTEL_SOUNDWIRE_ACPI SND_JACK SND_JACK_INPUT_DEV SND_MIXER_OSS SND_OSSEMUL SND_PCI SND_PCM SND_PCMCIA SND_PCM_OSS SND_PCM_OSS_PLUGINS SND_PCM_TIMER SND_PCM_XRUN_DEBUG SND_PROC_FS SND_RAWMIDI SND_SEQUENCER SND_SEQUENCER_OSS SND_SEQ_DEVICE SND_SEQ_DUMMY SND_SEQ_HRTIMER_DEFAULT SND_SEQ_MIDI SND_SEQ_MIDI_EVENT SND_SEQ_VIRMIDI SND_SUPPORT_OLD_API SND_TIMER SND_USB SND_USB_6FIRE SND_USB_AUDIO SND_USB_AUDIO_USE_MEDIA_CONTROLLER SND_USB_CAIAQ SND_USB_CAIAQ_INPUT SND_USB_HIFACE SND_USB_LINE6 SND_USB_POD SND_USB_PODHD SND_USB_TONEPORT SND_USB_UA101 SND_USB_US122L SND_USB_USX2Y SND_USB_VARIAX SND_VERBOSE_PROCFS SND_VIRMIDI SND_VIRTIO SND_VMASTER SND_X86 SOCK_CGROUP_DATA SOCK_VALIDATE_XMIT SOLARIS_X86_PARTITION SONY_FF SOUND SOUND_OSS_CORE SOUND_OSS_CORE_PRECLAIM SPI SPI_DLN2 SPI_DYNAMIC SPI_MASTER SQUASHFS SQUASHFS_4K_DEVBLK_SIZE SQUASHFS_DECOMP_SINGLE SQUASHFS_FILE_DIRECT SQUASHFS_LZ4 SQUASHFS_LZO SQUASHFS_XATTR SQUASHFS_XZ SQUASHFS_ZLIB SQUASHFS_ZSTD SSB SSB_PCIHOST_POSSIBLE SSB_PCMCIAHOST_POSSIBLE SSB_SDIOHOST_POSSIBLE STAGING STP STREAM_PARSER SUNRPC_BACKCHANNEL SUN_PARTITION SW_SYNC SYSV68_PARTITION SYSV_FS TABLET_USB_ACECAD TABLET_USB_AIPTEK TABLET_USB_HANWANG TABLET_USB_KBTAB TABLET_USB_PEGASUS TAHVO_USB TAHVO_USB_HOST_BY_DEFAULT TASKS_RCU TASKS_RCU_GENERIC TASKS_TRACE_RCU TCG_CRB TCG_TIS TCG_TIS_CORE TCG_TPM TCP_CONG_BBR TCP_CONG_BIC TCP_CONG_CDG TCP_CONG_DCTCP TCP_CONG_HSTCP TCP_CONG_HTCP TCP_CONG_HYBLA TCP_CONG_ILLINOIS TCP_CONG_LP TCP_CONG_NV TCP_CONG_SCALABLE TCP_CONG_VEGAS TCP_CONG_VENO TCP_CONG_WESTWOOD TCP_CONG_YEAH TEXTSEARCH TEXTSEARCH_BM TEXTSEARCH_FSM TEXTSEARCH_KMP THERMAL_NETLINK THP_SWAP THRUSTMASTER_FF TIPC TIPC_CRYPTO TIPC_DIAG TIPC_MEDIA_IB TIPC_MEDIA_UDP TLS TLS_TOE TOOLS_SUPPORT_RELR TOUCHSCREEN_SUR40 TOUCHSCREEN_USB_3M TOUCHSCREEN_USB_COMPOSITE TOUCHSCREEN_USB_DMC_TSC10 TOUCHSCREEN_USB_E2I TOUCHSCREEN_USB_EASYTOUCH TOUCHSCREEN_USB_EGALAX TOUCHSCREEN_USB_ELO TOUCHSCREEN_USB_ETT_TC45USB TOUCHSCREEN_USB_ETURBO TOUCHSCREEN_USB_GENERAL_TOUCH TOUCHSCREEN_USB_GOTOP TOUCHSCREEN_USB_GUNZE TOUCHSCREEN_USB_IDEALTEK TOUCHSCREEN_USB_IRTOUCH TOUCHSCREEN_USB_ITM TOUCHSCREEN_USB_JASTEC TOUCHSCREEN_USB_NEXIO TOUCHSCREEN_USB_PANJIT TOUCHSCREEN_USB_ZYTRONIC TPM_KEY_PARSER TRANSPARENT_HUGEPAGE TRANSPARENT_HUGEPAGE_MADVISE TRUSTED_KEYS TTPCI_EEPROM TTY_PRINTK TUN_VNET_CROSS_LE TWL4030_CORE TYPEC TYPEC_DP_ALTMODE TYPEC_FUSB302 TYPEC_HD3SS3220 TYPEC_MT6360 TYPEC_MUX_INTEL_PMC TYPEC_NVIDIA_ALTMODE TYPEC_RT1711H TYPEC_STUSB160X TYPEC_TCPCI TYPEC_TCPCI_MAXIM TYPEC_TCPM TYPEC_TPS6598X TYPEC_UCSI TYPEC_WCOVE UBIFS_ATIME_SUPPORT UBIFS_FS UBIFS_FS_ADVANCED_COMPR UBIFS_FS_LZO UBIFS_FS_SECURITY UBIFS_FS_XATTR UBIFS_FS_ZLIB UBIFS_FS_ZSTD UCSI_ACPI UCSI_CCG UDF_FS UDMABUF UFS_FS UFS_FS_WRITE UHID ULTRIX_PARTITION UNICODE UNIXWARE_DISKLABEL UNIX_DIAG USB4 USB4_NET USBIP_CORE USBIP_HOST USBIP_VHCI_HCD USBIP_VUDC USBPCWATCHDOG USB_ACM USB_ADUTUX USB_AIRSPY USB_ALI_M5632 USB_AN2720 USB_APPLEDISPLAY USB_ARMLINUX USB_BDC_UDC USB_BELKIN USB_C67X00_HCD USB_CATC USB_CDC_PHONET USB_CDNS3 USB_CDNS3_GADGET USB_CDNS3_HOST USB_CDNS3_PCI_WRAP USB_CDNSP_GADGET USB_CDNSP_HOST USB_CDNSP_PCI USB_CDNS_HOST USB_CDNS_SUPPORT USB_CHAOSKEY USB_CHIPIDEA USB_CHIPIDEA_GENERIC USB_DWC2 USB_GADGET USB_MUSB_HDRC USB_NET_CDC_SUBSET USB_ROLE_SWITCH USB_STORAGE_REALTEK USB_ULPI_BUS USB_USBNET VIDEO_DEV VIDEO_V4L2 VXLAN WIRELESS WLAN ZONE_DEVICE] disabling configs for [hang memleak bug_or_warning kasan locking atomic_sleep], they are not needed testing current HEAD 0248c33e835ecbec3a591f93fdaae53f7b90a4d6 testing commit 0248c33e835ecbec3a591f93fdaae53f7b90a4d6 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: c4a1dfd4fb45850900d65a011d54898ac20ea5b137837bf0494189d627c4efc7 all runs: OK false negative chance: 0.000 # git bisect start 0248c33e835ecbec3a591f93fdaae53f7b90a4d6 aabd761612dbeb7d40750d485da219d11433718a Bisecting: 899 revisions left to test after this (roughly 10 steps) [3df1a4026662121011187247897fe95fd84e8a3a] media: cec: stm32: prevent out-of-bounds write on RX overflow determine whether the revision contains the guilty commit revision aabd761612dbeb7d40750d485da219d11433718a crashed and is reachable testing commit 3df1a4026662121011187247897fe95fd84e8a3a gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 5e422c7c4e8a6c1ca50e31bd3df1d8e46aeb9ebdedb398c3d521c94752e03a28 all runs: OK false negative chance: 0.000 # git bisect bad 3df1a4026662121011187247897fe95fd84e8a3a Bisecting: 449 revisions left to test after this (roughly 9 steps) [0dadb0620ab65949a8bc2439dd28ea3c942fe87d] ip6_tunnel: clear skb2->cb[] in ip6ip6_err() determine whether the revision contains the guilty commit revision aabd761612dbeb7d40750d485da219d11433718a crashed and is reachable testing commit 0dadb0620ab65949a8bc2439dd28ea3c942fe87d gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: b4035645788f022c56fc6f349236ad589782dad5ea1a32c045404e1c6dd6e18e all runs: crashed: UBSAN: array-index-out-of-bounds in snd_dummy_probe representative crash: UBSAN: array-index-out-of-bounds in snd_dummy_probe, types: [MEMORY_SAFETY_UBSAN] # git bisect good 0dadb0620ab65949a8bc2439dd28ea3c942fe87d Bisecting: 224 revisions left to test after this (roughly 8 steps) [2fba1d3b2f031a2c68e566a6d45cc5b7a8d6683d] wifi: libertas_tf: fix use-after-free in lbtf_free_adapter() determine whether the revision contains the guilty commit revision aabd761612dbeb7d40750d485da219d11433718a crashed and is reachable testing commit 2fba1d3b2f031a2c68e566a6d45cc5b7a8d6683d gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 3b1c321478f1e3dabd3765b61c0b34c5bf6a67c8e0904b1998f45a3eab3dd5a2 all runs: crashed: UBSAN: array-index-out-of-bounds in snd_dummy_probe representative crash: UBSAN: array-index-out-of-bounds in snd_dummy_probe, types: [MEMORY_SAFETY_UBSAN] # git bisect good 2fba1d3b2f031a2c68e566a6d45cc5b7a8d6683d Bisecting: 112 revisions left to test after this (roughly 7 steps) [347201ced029911c926f788bc213d8c2ae572378] KVM: x86: Retry page fault if MMU reload is pending and root has no sp determine whether the revision contains the guilty commit revision aabd761612dbeb7d40750d485da219d11433718a crashed and is reachable testing commit 347201ced029911c926f788bc213d8c2ae572378 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 694940bad8274239bb6b77ee97fdfb96037fe2a76912633b06da5a53a3de5fb0 all runs: OK false negative chance: 0.000 # git bisect bad 347201ced029911c926f788bc213d8c2ae572378 Bisecting: 55 revisions left to test after this (roughly 6 steps) [ba2f156eaacd23f62dab3f39ceb8ac2a0f07366e] null_blk: fix UBSAN shift-out-of-bounds when zone_size is 0 or overflows determine whether the revision contains the guilty commit revision 0dadb0620ab65949a8bc2439dd28ea3c942fe87d crashed and is reachable testing commit ba2f156eaacd23f62dab3f39ceb8ac2a0f07366e gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 8a79678ab1d9db890d402ba1ab30d222e86c7f24267af4a1c55804e1f51c45a0 all runs: OK false negative chance: 0.000 # git bisect bad ba2f156eaacd23f62dab3f39ceb8ac2a0f07366e Bisecting: 27 revisions left to test after this (roughly 5 steps) [b5dbecc2016e1692fd1c2532af9c41ba729cb747] net/sched: act_ct: fix sk_buff leak when the header checks reject a packet determine whether the revision contains the guilty commit revision aabd761612dbeb7d40750d485da219d11433718a crashed and is reachable testing commit b5dbecc2016e1692fd1c2532af9c41ba729cb747 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 23ae4111c6e1fc20fc4a13a7eda6702c82b10292232bf4c97487aff162d1a590 all runs: crashed: UBSAN: array-index-out-of-bounds in snd_dummy_probe representative crash: UBSAN: array-index-out-of-bounds in snd_dummy_probe, types: [MEMORY_SAFETY_UBSAN] # git bisect good b5dbecc2016e1692fd1c2532af9c41ba729cb747 Bisecting: 13 revisions left to test after this (roughly 4 steps) [6b79659590f0f82a9b8efd2ffd55ec6399ebfc33] net/x25: fix use-after-free of the socket by its timers determine whether the revision contains the guilty commit revision 0dadb0620ab65949a8bc2439dd28ea3c942fe87d crashed and is reachable testing commit 6b79659590f0f82a9b8efd2ffd55ec6399ebfc33 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 8a4c22a548fab3457439086d0976d89697c2a81d288cf7c754e52820d16e83c4 all runs: crashed: UBSAN: array-index-out-of-bounds in snd_dummy_probe representative crash: UBSAN: array-index-out-of-bounds in snd_dummy_probe, types: [MEMORY_SAFETY_UBSAN] # git bisect good 6b79659590f0f82a9b8efd2ffd55ec6399ebfc33 Bisecting: 6 revisions left to test after this (roughly 3 steps) [6b524e6b234e45c7f5f90d13b042c6f57f80105c] ring-buffer: Use current_context for safe per-CPU buffer swap determine whether the revision contains the guilty commit revision 2fba1d3b2f031a2c68e566a6d45cc5b7a8d6683d crashed and is reachable testing commit 6b524e6b234e45c7f5f90d13b042c6f57f80105c gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 2990ea1f0d14985b9e8f401a9af153fcea94c108fc9f6bac6edf138629066b9a all runs: crashed: UBSAN: array-index-out-of-bounds in snd_dummy_probe representative crash: UBSAN: array-index-out-of-bounds in snd_dummy_probe, types: [MEMORY_SAFETY_UBSAN] # git bisect good 6b524e6b234e45c7f5f90d13b042c6f57f80105c Bisecting: 3 revisions left to test after this (roughly 2 steps) [eb71d5a1ea8ff2683e394b48ae3cd676037ab4c2] Bluetooth: RFCOMM: take rfcomm_mutex for the deferred setup accept determine whether the revision contains the guilty commit revision 0dadb0620ab65949a8bc2439dd28ea3c942fe87d crashed and is reachable testing commit eb71d5a1ea8ff2683e394b48ae3cd676037ab4c2 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 1b8e7e9bd77b7e8c838fa21ad8f5243db61addb009bc162aeae62df94b4a9306 all runs: crashed: UBSAN: array-index-out-of-bounds in snd_dummy_probe representative crash: UBSAN: array-index-out-of-bounds in snd_dummy_probe, types: [MEMORY_SAFETY_UBSAN] # git bisect good eb71d5a1ea8ff2683e394b48ae3cd676037ab4c2 Bisecting: 1 revision left to test after this (roughly 1 step) [b7579e86afcec932e169d10e2d603abed8dd2fdf] ALSA: dummy: Check card index validity at probe determine whether the revision contains the guilty commit revision 0dadb0620ab65949a8bc2439dd28ea3c942fe87d crashed and is reachable testing commit b7579e86afcec932e169d10e2d603abed8dd2fdf gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: b1654e8651d126c9b69a24128feedde5270de55a07b684a66fba598ec4f28338 all runs: OK false negative chance: 0.000 # git bisect bad b7579e86afcec932e169d10e2d603abed8dd2fdf Bisecting: 0 revisions left to test after this (roughly 0 steps) [8ca3bd404d076495ed0b274b65971c57b6fd5ac0] rndis_host: add overflow check in rndis_rx_fixup() determine whether the revision contains the guilty commit revision aabd761612dbeb7d40750d485da219d11433718a crashed and is reachable testing commit 8ca3bd404d076495ed0b274b65971c57b6fd5ac0 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 1b8e7e9bd77b7e8c838fa21ad8f5243db61addb009bc162aeae62df94b4a9306 all runs: crashed: UBSAN: array-index-out-of-bounds in snd_dummy_probe representative crash: UBSAN: array-index-out-of-bounds in snd_dummy_probe, types: [MEMORY_SAFETY_UBSAN] # git bisect good 8ca3bd404d076495ed0b274b65971c57b6fd5ac0 b7579e86afcec932e169d10e2d603abed8dd2fdf is the first bad commit commit b7579e86afcec932e169d10e2d603abed8dd2fdf Author: Takashi Iwai Date: Thu Aug 6 12:04:31 2026 +0200 ALSA: dummy: Check card index validity at probe commit 02442d5fe8ee365a084b055d4fa81a0c1abfc3fd upstream. snd_dummy_probe() blindly trusts that the given devptr->id value is within the proper card index range. It's OK for the devices the driver itself creates at the module probe time, but if the device is bound manually via sysfs interface, this could be -1 as "none", and this leads to OOB access for index[] and other parameters. Add a sanity check for the card index and warn/correct it if it's a value out of the range. Reported-by: syzbot+2fb5d1f7cc4c1f132bcc@syzkaller.appspotmail.com Closes: https://lore.kernel.org/6a73bd4d.01d0871a.3a0d52.0005.GAE@google.com Cc: Link: https://patch.msgid.link/20260806100433.1287393-1-tiwai@suse.de Signed-off-by: Takashi Iwai Signed-off-by: Greg Kroah-Hartman sound/drivers/dummy.c | 6 ++++++ 1 file changed, 6 insertions(+) accumulated error probability: 0.00 culprit signature: b1654e8651d126c9b69a24128feedde5270de55a07b684a66fba598ec4f28338 parent signature: 1b8e7e9bd77b7e8c838fa21ad8f5243db61addb009bc162aeae62df94b4a9306 revisions tested: 19, total time: 5h13m14.362530111s (build: 1h26m49.583926758s, test: 3h21m9.626339705s) first good commit: b7579e86afcec932e169d10e2d603abed8dd2fdf ALSA: dummy: Check card index validity at probe recipients (to): ["gregkh@linuxfoundation.org" "tiwai@suse.de"] recipients (cc): []