ci2 starts bisection 2026-09-12 19:17:34.233473305 +0000 UTC m=+66517.229765659 bisecting fixing commit since e4f7d8be268ecf717f94ee2e242afa79ddeacaed building syzkaller on 5d63f80b763910b40ae04a96c13dc75d621bea67 ensuring issue is reproducible on original commit e4f7d8be268ecf717f94ee2e242afa79ddeacaed testing commit e4f7d8be268ecf717f94ee2e242afa79ddeacaed gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 46adec5dca8f15a00681460558e0cbd960272ab4ab34ef0899e09c4d6c7c76e5 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 [kasan locking atomic_sleep hang memleak bug_or_warning], they are not needed testing commit e4f7d8be268ecf717f94ee2e242afa79ddeacaed gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 875b382079dcce9383c6bb6ae029348e42aebb97fa00788a09511a358739e397 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 [hang memleak bug_or_warning kasan locking atomic_sleep], they are not needed kconfig minimization: base=3829 full=7621 leaves diff=2129 split chunks (needed=false): <2129> split chunk #0 of len 2129 into 5 parts testing without sub-chunk 1/5 disabling configs for [kasan locking atomic_sleep hang memleak bug_or_warning], they are not needed testing commit e4f7d8be268ecf717f94ee2e242afa79ddeacaed gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 52c45c005ea97bc660013b2aa2fe39d29dc3290ad4f55cad4aef13a95443c1c7 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 [locking atomic_sleep hang memleak bug_or_warning kasan], they are not needed testing commit e4f7d8be268ecf717f94ee2e242afa79ddeacaed gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 8602689d106f6896986f2505147dc11e8e568fa5741255913e0ee23723632465 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 [locking atomic_sleep hang memleak bug_or_warning kasan], they are not needed testing commit e4f7d8be268ecf717f94ee2e242afa79ddeacaed gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: dc87dd33723f45d4b8a80a7b65ba387d7084679af57e0f237983b6b29cda27a6 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 [hang memleak bug_or_warning kasan locking atomic_sleep], they are not needed testing commit e4f7d8be268ecf717f94ee2e242afa79ddeacaed gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: d856a74634aa2cd3fe32003f228f549656ffa596a73f5b95a4347ef39d5ef146 all runs: OK false negative chance: 0.000 testing without sub-chunk 5/5 disabling configs for [kasan locking atomic_sleep hang memleak bug_or_warning], they are not needed testing commit e4f7d8be268ecf717f94ee2e242afa79ddeacaed gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 5016e06a87222973dfcc64da15e645ed2253e6c925d1337de195f915e07e0140 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 426 configs; suspects: [AF_RXRPC ARCH_ENABLE_MEMORY_HOTREMOVE ATM AX25 BXT_WC_PMIC_OPREGION CFG80211 CMA DAX DLM DRM DVB_CORE ENCRYPTED_KEYS EXTCON GENEVE GPIOLIB HAMRADIO HAVE_CLK HID_NINTENDO 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 LEDS_CLASS_MULTICOLOR LIBNVDIMM MAC80211 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_MT6370 MFD_RETU MMC MTD MTD_UBI NETFILTER_ADVANCED NETFILTER_CONNCOUNT NET_IPGRE NET_IPGRE_DEMUX NFS_V4_1 NF_CONNTRACK_SNMP NF_DUP_NETDEV NF_FLOW_TABLE NF_FLOW_TABLE_INET 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_NETDEV NF_TPROXY_IPV4 NF_TPROXY_IPV6 NILFS2_FS NINTENDO_FF 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_POOL PAGE_REPORTING PAHOLE_HAS_BTF_TAG PAHOLE_HAS_LANG_EXCLUDE 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 PLFXLC PMIC_OPREGION PM_CLK 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_NOTIFIERS 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 SENSORS_NZXT_SMART2 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 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_FAST_LOOKUP SND_CTL_LED 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_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 STAGING_MEDIA STP STREAM_PARSER SUNRPC_BACKCHANNEL SUN_PARTITION SW_SYNC SYSFB 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_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 TRANSPARENT_HUGEPAGE TRANSPARENT_HUGEPAGE_MADVISE TTPCI_EEPROM TTY_PRINTK TUN_VNET_CROSS_LE TWL4030_CORE TYPEC TYPEC_ANX7411 TYPEC_DP_ALTMODE TYPEC_FUSB302 TYPEC_HD3SS3220 TYPEC_MT6360 TYPEC_MUX_FSA4480 TYPEC_MUX_INTEL_PMC TYPEC_NVIDIA_ALTMODE TYPEC_RT1711H TYPEC_RT1719 TYPEC_STUSB160X TYPEC_TCPCI TYPEC_TCPCI_MAXIM TYPEC_TCPCI_MT6370 TYPEC_TCPM TYPEC_TPS6598X TYPEC_UCSI TYPEC_WCOVE TYPEC_WUSB3801 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 UCSI_STM32G0 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_DWC2 USB_GADGET USB_MUSB_HDRC USB_NET_CDC_SUBSET USB_ROLE_SWITCH USB_STORAGE_REALTEK USB_ULPI_BUS USB_USBNET VIDEO_DEV VXLAN WIRELESS WLAN WLAN_VENDOR_PURELIFI ZONE_DEVICE] disabling configs for [bug_or_warning kasan locking atomic_sleep hang memleak], they are not needed testing current HEAD cf82dcca96346600c7068cf3f841335f9fa08f54 testing commit cf82dcca96346600c7068cf3f841335f9fa08f54 gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 5d4c0aa34373e30ec6d855309ecf87444e133d3cd0d081625ed1277419f2c8d4 all runs: OK false negative chance: 0.000 # git bisect start cf82dcca96346600c7068cf3f841335f9fa08f54 e4f7d8be268ecf717f94ee2e242afa79ddeacaed Bisecting: 544 revisions left to test after this (roughly 9 steps) [83a765cbd7b4d11b0b9fa1bb9d941ae911a2159b] net: usb: ax88179_178a: fix skb leak in ax88179_tx_fixup() determine whether the revision contains the guilty commit revision e4f7d8be268ecf717f94ee2e242afa79ddeacaed crashed and is reachable testing commit 83a765cbd7b4d11b0b9fa1bb9d941ae911a2159b gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 46472d341f170e731ec7bdf57f2ef099b8409f2fcc117f885b537f1b6684bb39 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 83a765cbd7b4d11b0b9fa1bb9d941ae911a2159b Bisecting: 272 revisions left to test after this (roughly 8 steps) [8ce48d2879aafc0e7a6f8bfc3613c0ba979ec6f5] mptcp: pm: userspace: fix use-after-free in get_local_id determine whether the revision contains the guilty commit revision e4f7d8be268ecf717f94ee2e242afa79ddeacaed crashed and is reachable testing commit 8ce48d2879aafc0e7a6f8bfc3613c0ba979ec6f5 gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 4d52c0e72762bba34f3104efecac5395f97282df823f3f7acac98c102cf4762c 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 8ce48d2879aafc0e7a6f8bfc3613c0ba979ec6f5 Bisecting: 136 revisions left to test after this (roughly 7 steps) [6509e270ae1b4366a95f8d75b0dafec7b6f9e7a8] tls: fix lockless read of strp->msg_ready in ->poll determine whether the revision contains the guilty commit revision e4f7d8be268ecf717f94ee2e242afa79ddeacaed crashed and is reachable testing commit 6509e270ae1b4366a95f8d75b0dafec7b6f9e7a8 gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 643f92c9c49db0a3fc4bf96730a03563c74f735afa4300bcadf77958343ca1d4 all runs: OK false negative chance: 0.000 # git bisect bad 6509e270ae1b4366a95f8d75b0dafec7b6f9e7a8 Bisecting: 67 revisions left to test after this (roughly 6 steps) [ca97360eba4b3dc67f1804625542f4ccc774242a] netfilter: nf_conntrack: defer invalid log until after unlock determine whether the revision contains the guilty commit revision 8ce48d2879aafc0e7a6f8bfc3613c0ba979ec6f5 crashed and is reachable testing commit ca97360eba4b3dc67f1804625542f4ccc774242a gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 97e7b402ad2445835364b449f2f3840357a24ebcf27fab02df8cc0f1b8bb8077 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 ca97360eba4b3dc67f1804625542f4ccc774242a Bisecting: 33 revisions left to test after this (roughly 5 steps) [4d0892a90b57f0e89b274c3f3c51c2fa17937c88] ALSA: dummy: Check card index validity at probe determine whether the revision contains the guilty commit revision ca97360eba4b3dc67f1804625542f4ccc774242a crashed and is reachable testing commit 4d0892a90b57f0e89b274c3f3c51c2fa17937c88 gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 4c14323d37725d7f5038dab4943e2ae50e453cba655eb893ddbf7db6ac060665 all runs: OK false negative chance: 0.000 # git bisect bad 4d0892a90b57f0e89b274c3f3c51c2fa17937c88 Bisecting: 16 revisions left to test after this (roughly 4 steps) [9332b080ad57650d1dc582e54517f9fc78ef89cc] mm/huge_memory: fix huge_zero_pfn race determine whether the revision contains the guilty commit revision 83a765cbd7b4d11b0b9fa1bb9d941ae911a2159b crashed and is reachable testing commit 9332b080ad57650d1dc582e54517f9fc78ef89cc gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: e7cd7fd714b8147de2e35bba04e008246ae63005985459ab64b6e25e75de87e2 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 9332b080ad57650d1dc582e54517f9fc78ef89cc Bisecting: 8 revisions left to test after this (roughly 3 steps) [32279b35dd147700ddd7e5f4811fed2619dbe8c8] Bluetooth: hci_sync: call destroy in hci_cmd_sync_run if immediate determine whether the revision contains the guilty commit revision 9332b080ad57650d1dc582e54517f9fc78ef89cc crashed and is reachable testing commit 32279b35dd147700ddd7e5f4811fed2619dbe8c8 gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 1ac6d8b12e421161a49150817e3caec39efa9cb615309a214513a456e5f9ac34 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 32279b35dd147700ddd7e5f4811fed2619dbe8c8 Bisecting: 4 revisions left to test after this (roughly 2 steps) [597f279b7b4a06412e3d965e98cc36e181cdbede] ring-buffer: Use current_context for safe per-CPU buffer swap determine whether the revision contains the guilty commit revision 9332b080ad57650d1dc582e54517f9fc78ef89cc crashed and is reachable testing commit 597f279b7b4a06412e3d965e98cc36e181cdbede gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: b534b7f1b59a54182b61f3612dff0067fc0a4884688149113af4c927ddcfdb27 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 597f279b7b4a06412e3d965e98cc36e181cdbede Bisecting: 2 revisions left to test after this (roughly 1 step) [baf9b0383ff770fdff123d3a832f3a99641d96dd] PCI: host-generic: Fix NULL pointer dereference on 32-bit CAM systems determine whether the revision contains the guilty commit revision 9332b080ad57650d1dc582e54517f9fc78ef89cc crashed and is reachable testing commit baf9b0383ff770fdff123d3a832f3a99641d96dd gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: 139803eedc7b454738e2b75965cdf73c1edebb191badd41c7f290f02aedb42ee 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 baf9b0383ff770fdff123d3a832f3a99641d96dd Bisecting: 0 revisions left to test after this (roughly 1 step) [f8e6fde5db87f855e99b200e392467274f0eb9d7] rndis_host: add overflow check in rndis_rx_fixup() determine whether the revision contains the guilty commit revision e4f7d8be268ecf717f94ee2e242afa79ddeacaed crashed and is reachable testing commit f8e6fde5db87f855e99b200e392467274f0eb9d7 gcc compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 kernel signature: f4bc0cade788d191ba78a59530c24fecf286ed7cec09872cdef3f80d3b546b24 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 f8e6fde5db87f855e99b200e392467274f0eb9d7 4d0892a90b57f0e89b274c3f3c51c2fa17937c88 is the first bad commit commit 4d0892a90b57f0e89b274c3f3c51c2fa17937c88 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: 4c14323d37725d7f5038dab4943e2ae50e453cba655eb893ddbf7db6ac060665 parent signature: f4bc0cade788d191ba78a59530c24fecf286ed7cec09872cdef3f80d3b546b24 revisions tested: 18, total time: 4h54m58.944465847s (build: 1h46m50.147532628s, test: 2h40m29.475809954s) first good commit: 4d0892a90b57f0e89b274c3f3c51c2fa17937c88 ALSA: dummy: Check card index validity at probe recipients (to): ["gregkh@linuxfoundation.org" "tiwai@suse.de"] recipients (cc): []