ci2 starts bisection 2026-10-06 08:16:58.563516307 +0000 UTC m=+30538.637682382 bisecting fixing commit since 0eb903b5b519d037c723d47a58c5d4f20eed7342 building syzkaller on 1e72964b0111319984575e60f266d1fa0a98abb5 ensuring issue is reproducible on original commit 0eb903b5b519d037c723d47a58c5d4f20eed7342 testing commit 0eb903b5b519d037c723d47a58c5d4f20eed7342 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: b43131a73897178feac45afc8e44e7cfa1b635c5c4ef5cd882ad0fcc2c676d7c run #0: crashed: KASAN: use-after-free Read in release_card_device run #1: crashed: KASAN: use-after-free Read in release_card_device run #2: crashed: KASAN: use-after-free Read in release_card_device run #3: crashed: KASAN: use-after-free Read in release_card_device run #4: crashed: KASAN: use-after-free Read in release_card_device run #5: crashed: KASAN: use-after-free Read in release_card_device run #6: crashed: KASAN: use-after-free Read in release_card_device run #7: crashed: KASAN: use-after-free Read in release_card_device run #8: crashed: KASAN: use-after-free Read in release_card_device run #9: crashed: KASAN: use-after-free Read in release_card_device run #10: crashed: KASAN: use-after-free Read in release_card_device run #11: crashed: KASAN: use-after-free Read in release_card_device run #12: crashed: KASAN: use-after-free Read in release_card_device run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: KASAN: use-after-free Read in release_card_device, types: [KASAN-USE-AFTER-FREE-READ] check whether we can drop unnecessary instrumentation disabling configs for [atomic_sleep hang memleak ubsan bug_or_warning locking], they are not needed testing commit 0eb903b5b519d037c723d47a58c5d4f20eed7342 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 1caeea683deb55793248759bf43708226ed118ea7f9366a5c823e35b6d61cbe3 run #0: crashed: KASAN: use-after-free Read in release_card_device run #1: crashed: KASAN: use-after-free Read in release_card_device run #2: crashed: KASAN: use-after-free Read in release_card_device run #3: crashed: KASAN: use-after-free Read in release_card_device run #4: crashed: KASAN: use-after-free Read in release_card_device run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK representative crash: KASAN: use-after-free Read in release_card_device, types: [KASAN-USE-AFTER-FREE-READ] the bug reproduces without the instrumentation disabling configs for [locking atomic_sleep hang memleak ubsan 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 [locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed testing commit 0eb903b5b519d037c723d47a58c5d4f20eed7342 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: aeaffae6ce7d9a8d795a8a26e17bb7e658839764871be0be3b5dbee8ef18635f run #0: crashed: KASAN: use-after-free Read in release_card_device run #1: crashed: KASAN: use-after-free Read in release_card_device run #2: crashed: KASAN: use-after-free Read in release_card_device run #3: crashed: KASAN: use-after-free Read in release_card_device run #4: crashed: KASAN: use-after-free Read in release_card_device run #5: crashed: KASAN: use-after-free Read in release_card_device run #6: crashed: KASAN: use-after-free Read in release_card_device run #7: OK run #8: OK run #9: OK representative crash: KASAN: use-after-free Read in release_card_device, types: [KASAN-USE-AFTER-FREE-READ] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [hang memleak ubsan bug_or_warning locking atomic_sleep], they are not needed testing commit 0eb903b5b519d037c723d47a58c5d4f20eed7342 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 862d4131dd4bfe84807da50bc82efe5385cf42d3d6d0185ff1e51714cfe5c6e1 run #0: crashed: KASAN: use-after-free Read in release_card_device run #1: crashed: KASAN: use-after-free Read in release_card_device run #2: crashed: KASAN: use-after-free Read in release_card_device run #3: crashed: KASAN: use-after-free Read in release_card_device run #4: crashed: KASAN: use-after-free Read in release_card_device run #5: crashed: KASAN: use-after-free Read in release_card_device run #6: OK run #7: OK run #8: OK run #9: OK representative crash: KASAN: use-after-free Read in release_card_device, types: [KASAN-USE-AFTER-FREE-READ] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [ubsan bug_or_warning locking atomic_sleep hang memleak], they are not needed testing commit 0eb903b5b519d037c723d47a58c5d4f20eed7342 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 7aaff0dfa547e9bdf059505d8059b868788d8510238974bbe89087cf562e8d97 run #0: crashed: KASAN: use-after-free Read in release_card_device run #1: crashed: KASAN: use-after-free Read in release_card_device run #2: crashed: KASAN: use-after-free Read in release_card_device run #3: crashed: invalid opcode in corrupted run #4: crashed: KASAN: use-after-free Read in release_card_device run #5: crashed: KASAN: use-after-free Read in release_card_device run #6: OK run #7: OK run #8: OK run #9: OK representative crash: KASAN: use-after-free Read in release_card_device, types: [KASAN-USE-AFTER-FREE-READ] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [bug_or_warning locking atomic_sleep hang memleak ubsan], they are not needed testing commit 0eb903b5b519d037c723d47a58c5d4f20eed7342 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 3a557afd37340f1ccef23f0ef4226bf0bf731ff9512119e39486b8d430cbf503 all runs: OK false negative chance: 0.000 testing without sub-chunk 5/5 disabling configs for [locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed testing commit 0eb903b5b519d037c723d47a58c5d4f20eed7342 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: ed00c665eeec8596195dcd285fb21a2ce691f3ece1da6ca5a5335201cc247796 run #0: crashed: KASAN: use-after-free Read in release_card_device run #1: crashed: KASAN: use-after-free Read in release_card_device run #2: crashed: KASAN: use-after-free Read in release_card_device run #3: crashed: KASAN: use-after-free Read in release_card_device run #4: crashed: KASAN: use-after-free Read in release_card_device run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK representative crash: KASAN: use-after-free Read in release_card_device, types: [KASAN-USE-AFTER-FREE-READ] 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 ubsan bug_or_warning locking atomic_sleep], they are not needed testing current HEAD a051a4bf909f76f470ccb3761ee0cf6e2395616e testing commit a051a4bf909f76f470ccb3761ee0cf6e2395616e gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 296be77226a94e70a277392e754714cd576c91ddc78899fa2b4359e7637baf4d all runs: OK false negative chance: 0.001 # git bisect start a051a4bf909f76f470ccb3761ee0cf6e2395616e 0eb903b5b519d037c723d47a58c5d4f20eed7342 Bisecting: 1045 revisions left to test after this (roughly 10 steps) [e7505842f1329ece90cb9ea0db87772aeca44052] md/raid5-ppl: fix use-after-free in ppl_do_flush() determine whether the revision contains the guilty commit revision 0eb903b5b519d037c723d47a58c5d4f20eed7342 crashed and is reachable testing commit e7505842f1329ece90cb9ea0db87772aeca44052 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: ede47be78c67d4c0a3e6601185880939c4bec2b5611fe3169d6029183dd3e58e run #0: crashed: KASAN: use-after-free Read in release_card_device run #1: crashed: KASAN: use-after-free Read in release_card_device run #2: crashed: KASAN: use-after-free Read in release_card_device run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK representative crash: KASAN: use-after-free Read in release_card_device, types: [KASAN-USE-AFTER-FREE-READ] # git bisect good e7505842f1329ece90cb9ea0db87772aeca44052 Bisecting: 522 revisions left to test after this (roughly 9 steps) [962368185bd682bcfad01ac698b72cae4d72c150] ALSA: usb-audio: Add quirk for Corsair Virtuoso (later revision) determine whether the revision contains the guilty commit revision 0eb903b5b519d037c723d47a58c5d4f20eed7342 crashed and is reachable testing commit 962368185bd682bcfad01ac698b72cae4d72c150 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: b5cc8a3a22d5ef7d35e60c691b5fc933e50011789b9fbb936391c61d0addd323 all runs: OK false negative chance: 0.000 # git bisect bad 962368185bd682bcfad01ac698b72cae4d72c150 Bisecting: 261 revisions left to test after this (roughly 8 steps) [d453bf439ef230b5743afc25e194adacca8c6e43] net/sched: sch_teql: restore skb->dev on the slave failure path determine whether the revision contains the guilty commit revision 0eb903b5b519d037c723d47a58c5d4f20eed7342 crashed and is reachable testing commit d453bf439ef230b5743afc25e194adacca8c6e43 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 818702e158c4d14ac509f2193a6fd0541f60733ed02257f4ec4b85459668ddb0 all runs: OK false negative chance: 0.000 # git bisect bad d453bf439ef230b5743afc25e194adacca8c6e43 Bisecting: 130 revisions left to test after this (roughly 7 steps) [5590d71f3699becb0014b8802c71de20957619f7] perf stat: Clear screen only if output file is a tty determine whether the revision contains the guilty commit revision e7505842f1329ece90cb9ea0db87772aeca44052 crashed and is reachable testing commit 5590d71f3699becb0014b8802c71de20957619f7 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 418f64b2cf85875e6717078bf51d8aa5197897c2aa74616f0eb465cc9a04244d run #0: crashed: KASAN: use-after-free Read in release_card_device run #1: crashed: KASAN: use-after-free Read in release_card_device run #2: crashed: KASAN: use-after-free Read in release_card_device run #3: crashed: KASAN: use-after-free Read in release_card_device run #4: crashed: KASAN: use-after-free Read in release_card_device run #5: crashed: KASAN: use-after-free Read in release_card_device run #6: crashed: KASAN: use-after-free Read in release_card_device run #7: crashed: KASAN: use-after-free Read in release_card_device run #8: crashed: KASAN: use-after-free Read in release_card_device run #9: crashed: KASAN: use-after-free Read in release_card_device run #10: crashed: invalid opcode in corrupted run #11: crashed: KASAN: use-after-free Read in release_card_device run #12: crashed: KASAN: use-after-free Read in release_card_device run #13: crashed: KASAN: use-after-free Read in release_card_device run #14: crashed: KASAN: use-after-free Read in release_card_device run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: KASAN: use-after-free Read in release_card_device, types: [KASAN-USE-AFTER-FREE-READ] # git bisect good 5590d71f3699becb0014b8802c71de20957619f7 Bisecting: 65 revisions left to test after this (roughly 6 steps) [402c19f5c81674ca8cf4cd40e15273d260ce0bd5] bpf: Fix pending_pos walk on 32-bit ring position wrap determine whether the revision contains the guilty commit revision 5590d71f3699becb0014b8802c71de20957619f7 crashed and is reachable testing commit 402c19f5c81674ca8cf4cd40e15273d260ce0bd5 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 21878574c60a38069f130117a1c933493b3f0b148ddef0f25e80b366b430b15d all runs: OK false negative chance: 0.000 # git bisect bad 402c19f5c81674ca8cf4cd40e15273d260ce0bd5 Bisecting: 32 revisions left to test after this (roughly 5 steps) [f3e883b075bad49c568eecacb751c1e288164513] ubi: fastmap: Add fastmap control support for module parameter determine whether the revision contains the guilty commit revision e7505842f1329ece90cb9ea0db87772aeca44052 crashed and is reachable testing commit f3e883b075bad49c568eecacb751c1e288164513 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 41b3ecf16815551095afcb8a07bf42bb093c114a57c5c4a6486939f9af970d2f run #0: crashed: KASAN: use-after-free Read in release_card_device run #1: crashed: KASAN: use-after-free Read in release_card_device run #2: crashed: KASAN: use-after-free Read in release_card_device run #3: crashed: KASAN: use-after-free Read in release_card_device run #4: crashed: KASAN: use-after-free Read in release_card_device run #5: crashed: KASAN: use-after-free Read in release_card_device run #6: crashed: KASAN: use-after-free Read in release_card_device run #7: crashed: KASAN: use-after-free Read in release_card_device run #8: crashed: KASAN: use-after-free Read in release_card_device run #9: crashed: KASAN: use-after-free Read in release_card_device run #10: crashed: KASAN: use-after-free Read in release_card_device run #11: crashed: KASAN: use-after-free Read in release_card_device run #12: crashed: KASAN: use-after-free Read in release_card_device run #13: crashed: KASAN: use-after-free Read in release_card_device run #14: ignore: lost connection to test machine run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: KASAN: use-after-free Read in release_card_device, types: [KASAN-USE-AFTER-FREE-READ] # git bisect good f3e883b075bad49c568eecacb751c1e288164513 Bisecting: 16 revisions left to test after this (roughly 4 steps) [c04a22a373d8be42a4ce918b6ec9ec3e6b661570] spi: img-spfi: don't disable runtime PM on DMA deferred probe determine whether the revision contains the guilty commit revision f3e883b075bad49c568eecacb751c1e288164513 crashed and is reachable testing commit c04a22a373d8be42a4ce918b6ec9ec3e6b661570 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 09aadbc0f512da63c231be03165a3056b0405f5b0c29460895d34141644728e6 run #0: crashed: KASAN: use-after-free Read in release_card_device run #1: crashed: invalid opcode in corrupted run #2: crashed: KASAN: use-after-free Read in release_card_device run #3: crashed: KASAN: use-after-free Read in release_card_device run #4: crashed: KASAN: use-after-free Read in release_card_device run #5: crashed: KASAN: use-after-free Read in release_card_device run #6: crashed: KASAN: use-after-free Read in release_card_device run #7: crashed: KASAN: use-after-free Read in release_card_device run #8: crashed: KASAN: use-after-free Read in release_card_device run #9: crashed: KASAN: use-after-free Read in release_card_device run #10: crashed: KASAN: use-after-free Read in release_card_device run #11: crashed: KASAN: use-after-free Read in release_card_device run #12: crashed: KASAN: use-after-free Read in release_card_device run #13: crashed: KASAN: use-after-free Read in release_card_device run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: KASAN: use-after-free Read in release_card_device, types: [KASAN-USE-AFTER-FREE-READ] # git bisect good c04a22a373d8be42a4ce918b6ec9ec3e6b661570 Bisecting: 8 revisions left to test after this (roughly 3 steps) [f997800336ab26ec8fda59d5d77ab0d56e1dbf4c] clocksource/drivers/armada: Unwind timer clock on init failure determine whether the revision contains the guilty commit revision e7505842f1329ece90cb9ea0db87772aeca44052 crashed and is reachable testing commit f997800336ab26ec8fda59d5d77ab0d56e1dbf4c gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 09aadbc0f512da63c231be03165a3056b0405f5b0c29460895d34141644728e6 run #0: crashed: KASAN: use-after-free Read in release_card_device run #1: crashed: KASAN: use-after-free Read in release_card_device run #2: crashed: KASAN: use-after-free Read in release_card_device run #3: crashed: KASAN: use-after-free Read in release_card_device run #4: crashed: KASAN: use-after-free Read in release_card_device run #5: crashed: KASAN: use-after-free Read in release_card_device run #6: crashed: KASAN: use-after-free Read in release_card_device run #7: crashed: KASAN: use-after-free Read in release_card_device run #8: crashed: KASAN: use-after-free Read in release_card_device run #9: crashed: KASAN: use-after-free Read in release_card_device run #10: crashed: KASAN: use-after-free Read in release_card_device run #11: crashed: KASAN: use-after-free Read in release_card_device run #12: crashed: KASAN: use-after-free Read in release_card_device run #13: crashed: KASAN: use-after-free Read in release_card_device run #14: crashed: KASAN: use-after-free Read in release_card_device run #15: crashed: KASAN: use-after-free Read in release_card_device run #16: OK run #17: OK run #18: OK run #19: OK representative crash: KASAN: use-after-free Read in release_card_device, types: [KASAN-USE-AFTER-FREE-READ] # git bisect good f997800336ab26ec8fda59d5d77ab0d56e1dbf4c Bisecting: 4 revisions left to test after this (roughly 2 steps) [c2a126fca820ae74872da28de68dc74d4595dc4b] Squashfs: check block offset is not negative determine whether the revision contains the guilty commit revision e7505842f1329ece90cb9ea0db87772aeca44052 crashed and is reachable testing commit c2a126fca820ae74872da28de68dc74d4595dc4b gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 570a112f6f12212d4ce2378e3effbf37ce9c3491636ed7986f73dac07c2241a4 run #0: crashed: KASAN: use-after-free Read in release_card_device run #1: crashed: KASAN: use-after-free Read in release_card_device run #2: crashed: KASAN: use-after-free Read in release_card_device run #3: crashed: KASAN: use-after-free Read in release_card_device run #4: crashed: KASAN: use-after-free Read in release_card_device run #5: crashed: KASAN: use-after-free Read in release_card_device run #6: crashed: KASAN: use-after-free Read in release_card_device run #7: crashed: KASAN: use-after-free Read in release_card_device run #8: crashed: KASAN: use-after-free Read in release_card_device run #9: crashed: KASAN: use-after-free Read in release_card_device run #10: crashed: KASAN: use-after-free Read in release_card_device run #11: crashed: KASAN: use-after-free Read in release_card_device 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: KASAN: use-after-free Read in release_card_device, types: [KASAN-USE-AFTER-FREE-READ] # git bisect good c2a126fca820ae74872da28de68dc74d4595dc4b Bisecting: 2 revisions left to test after this (roughly 1 step) [d3d67f680dbc23a5e5e3d3ecfdbf700465809877] ALSA: core: Fix use-after-free in snd_card_do_free() determine whether the revision contains the guilty commit revision f3e883b075bad49c568eecacb751c1e288164513 crashed and is reachable testing commit d3d67f680dbc23a5e5e3d3ecfdbf700465809877 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 9bd3472f43cf7074dffde4a5949d34bc3e628f6430d14c6ac6f9340d987aeea8 all runs: OK false negative chance: 0.000 # git bisect bad d3d67f680dbc23a5e5e3d3ecfdbf700465809877 Bisecting: 0 revisions left to test after this (roughly 0 steps) [240b582b6372bebb1245d911add9954b7dd6c02d] scsi: mpt3sas: Avoid freeing unallocated PCIe SGL buffers determine whether the revision contains the guilty commit revision c04a22a373d8be42a4ce918b6ec9ec3e6b661570 crashed and is reachable testing commit 240b582b6372bebb1245d911add9954b7dd6c02d gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44 kernel signature: 570a112f6f12212d4ce2378e3effbf37ce9c3491636ed7986f73dac07c2241a4 run #0: crashed: KASAN: use-after-free Read in release_card_device run #1: crashed: KASAN: use-after-free Read in release_card_device run #2: crashed: KASAN: use-after-free Read in release_card_device run #3: crashed: KASAN: use-after-free Read in release_card_device run #4: crashed: KASAN: use-after-free Read in release_card_device run #5: crashed: KASAN: use-after-free Read in release_card_device run #6: crashed: KASAN: use-after-free Read in release_card_device run #7: crashed: KASAN: use-after-free Read in release_card_device run #8: crashed: KASAN: use-after-free Read in release_card_device run #9: crashed: KASAN: use-after-free Read in release_card_device run #10: crashed: KASAN: use-after-free Read in release_card_device run #11: crashed: KASAN: use-after-free Read in release_card_device run #12: crashed: KASAN: use-after-free Read in release_card_device run #13: crashed: KASAN: use-after-free Read in release_card_device run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: KASAN: use-after-free Read in release_card_device, types: [KASAN-USE-AFTER-FREE-READ] # git bisect good 240b582b6372bebb1245d911add9954b7dd6c02d d3d67f680dbc23a5e5e3d3ecfdbf700465809877 is the first bad commit commit d3d67f680dbc23a5e5e3d3ecfdbf700465809877 Author: Aleksandr Nogikh Date: Fri Aug 14 12:05:43 2026 +0000 ALSA: core: Fix use-after-free in snd_card_do_free() [ Upstream commit 5ae1a690c522fea2900ff56c8c2ace7b059f5e04 ] A use-after-free was detected in snd_card_do_free() when a sound card managed by devres is unbound while a user-space application still holds an open file descriptor. For managed cards, the memory is allocated using devres_alloc(), and its release function is set to __snd_card_release(), which calls snd_card_free(). When the device is unbound, the unbind thread calls snd_card_free(), which drops a reference to the card's device. If the user thread still has an open file descriptor, the reference count does not reach zero, and the unbind thread blocks on wait_for_completion(&released). When the user thread closes the file descriptor, it drops the final reference, invoking the device release callback release_card_device(), which calls snd_card_do_free(). snd_card_do_free() performs cleanup and calls complete(card->release_completion). This wakes up the unbind thread, which returns from snd_card_free() and __snd_card_release(). The devres core then immediately frees the memory block containing the snd_card structure. Meanwhile, the user thread continues execution in snd_card_do_free() and evaluates `if (!card->managed)`. It reads the `managed` boolean from the snd_card structure that was just freed by the unbind thread, triggering a KASAN use-after-free. Fix this by caching the value of card->managed in a local variable before calling complete(). This ensures that the card pointer is not dereferenced after the unbind thread has been woken up and potentially freed the card. BUG: KASAN: use-after-free in snd_card_do_free sound/core/init.c:604 [inline] BUG: KASAN: use-after-free in release_card_device+0x1ab/0x1b0 sound/core/init.c:153 Read of size 1 at addr ffff8881912ec909 by task syz-executor130/5857 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_address_description+0x55/0x1e0 mm/kasan/report.c:378 print_report+0x58/0x70 mm/kasan/report.c:482 kasan_report+0x117/0x150 mm/kasan/report.c:595 snd_card_do_free sound/core/init.c:604 [inline] release_card_device+0x1ab/0x1b0 sound/core/init.c:153 device_release+0xc4/0x1f0 drivers/base/core.c:-1 kobject_cleanup lib/kobject.c:689 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x222/0x550 lib/kobject.c:737 snd_card_file_remove+0x331/0x390 sound/core/init.c:1125 snd_pcm_release+0x12c/0x160 sound/core/pcm_native.c:2986 __fput+0x418/0xa50 fs/file_table.c:512 fput_close_sync+0x11f/0x240 fs/file_table.c:617 __do_sys_close fs/open.c:1511 [inline] __se_sys_close fs/open.c:1496 [inline] __x64_sys_close+0x7e/0x110 fs/open.c:1496 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Fixes: e8ad415b7a55 ("ALSA: core: Add managed card creation") Assisted-by: Gemini:gemini-3.6-flash Gemini:gemini-3.1-pro-preview syzbot Reported-by: syzbot+7061d72c26b7daebe2b4@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=7061d72c26b7daebe2b4 Link: https://syzkaller.appspot.com/ai_job?id=24752a23-f0b6-49c1-bf20-4fa89c2e7eb2 Signed-off-by: Aleksandr Nogikh Link: https://patch.msgid.link/02042186-27b7-42a9-b64e-f93ce8fbe05a@mail.kernel.org Signed-off-by: Takashi Iwai Signed-off-by: Sasha Levin sound/core/init.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) accumulated error probability: 0.00 culprit signature: 9bd3472f43cf7074dffde4a5949d34bc3e628f6430d14c6ac6f9340d987aeea8 parent signature: 570a112f6f12212d4ce2378e3effbf37ce9c3491636ed7986f73dac07c2241a4 reproducer is flaky (0.40 repro chance estimate) revisions tested: 19, total time: 6h15m0.885109703s (build: 1h34m21.198450875s, test: 4h20m18.118632015s) first good commit: d3d67f680dbc23a5e5e3d3ecfdbf700465809877 ALSA: core: Fix use-after-free in snd_card_do_free() recipients (to): ["nogikh@google.com" "sashal@kernel.org" "tiwai@suse.de"] recipients (cc): []