ci starts bisection 2023-09-25 06:15:08.052143646 +0000 UTC m=+1019452.071267654 bisecting cause commit starting from a4412fdd49dc011bcc2c0d81ac4cab7457092650 building syzkaller on e080de16713b9dbf308cdd7bcb85b58293e46e33 ensuring issue is reproducible on original commit a4412fdd49dc011bcc2c0d81ac4cab7457092650 testing commit a4412fdd49dc011bcc2c0d81ac4cab7457092650 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 8a48ada30739296a471a18a530a8af44dd527f59ea910e417f2be29ea4689a23 all runs: crashed: KASAN: use-after-free Read in gsm_cleanup_mux representative crash: KASAN: use-after-free Read in gsm_cleanup_mux, types: [KASAN] check whether we can drop unnecessary instrumentation disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed testing commit a4412fdd49dc011bcc2c0d81ac4cab7457092650 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 20c77a441ca1b075aaf4802268e7c788e2f372f6c8747dc384e511b8606eb99d all runs: crashed: KASAN: use-after-free Read in gsm_cleanup_mux representative crash: KASAN: use-after-free Read in gsm_cleanup_mux, types: [KASAN] the bug reproduces without the instrumentation disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed kconfig minimization: base=3883 full=7509 leaves diff=2002 split chunks (needed=false): <2002> split chunk #0 of len 2002 into 5 parts testing without sub-chunk 1/5 disabling configs for [UBSAN BUG LOCKDEP ATOMIC_SLEEP HANG LEAK], they are not needed testing commit a4412fdd49dc011bcc2c0d81ac4cab7457092650 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: d52882a88f7eb648338c6aba200a746f47849d9bbb0cc263004c5a5d6b0de374 all runs: crashed: KASAN: use-after-free Read in gsm_cleanup_mux representative crash: KASAN: use-after-free Read in gsm_cleanup_mux, types: [KASAN] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed testing commit a4412fdd49dc011bcc2c0d81ac4cab7457092650 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 0297efa872aab72c51ddfdf3e8f3f4dc0a49527710d640b96589ccdd4941af8b all runs: crashed: KASAN: use-after-free Read in gsm_cleanup_mux representative crash: KASAN: use-after-free Read in gsm_cleanup_mux, types: [KASAN] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [UBSAN BUG LOCKDEP ATOMIC_SLEEP HANG LEAK], they are not needed testing commit a4412fdd49dc011bcc2c0d81ac4cab7457092650 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 4a90829d60e885feed1bd32e334989a231b1f81c943b091bd12a79b909571dbe all runs: crashed: KASAN: use-after-free Read in gsm_cleanup_mux representative crash: KASAN: use-after-free Read in gsm_cleanup_mux, types: [KASAN] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed testing commit a4412fdd49dc011bcc2c0d81ac4cab7457092650 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7095c3967985b60102a938179802c8b2c9445db4541601f92e1347ae334f761f all runs: OK false negative chance: 0.000 testing without sub-chunk 5/5 disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed testing commit a4412fdd49dc011bcc2c0d81ac4cab7457092650 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: c05d4b944895299c230c1d32330cb15a08c6acda642fa3214f43c017b092395f all runs: crashed: KASAN: use-after-free Read in gsm_cleanup_mux representative crash: KASAN: use-after-free Read in gsm_cleanup_mux, types: [KASAN] the chunk can be dropped minimized to 401 configs; suspects: [AF_RXRPC ARCH_ENABLE_MEMORY_HOTREMOVE ATM AX25 CC_HAS_UBSAN_BOUNDS CFG80211 CMA DAX DLM DVB_CORE ENCRYPTED_KEYS EXTCON GENEVE GPIOLIB HAMRADIO HAVE_CLK HID_SENSOR_HUB HID_SMARTJOYPLUS HID_THRUSTMASTER IIO INFINIBAND INFINIBAND_ADDR_TRANS INFINIBAND_IPOIB INFINIBAND_USER_ACCESS INFINIBAND_VIRT_DMA INPUT_TABLET INPUT_TOUCHSCREEN IP_SCTP L2TP LIBNVDIMM MEDIA_COMMON_OPTIONS MEDIA_DIGITAL_TV_SUPPORT MEDIA_RADIO_SUPPORT MEDIA_SDR_SUPPORT MEDIA_SUPPORT MEDIA_USB_SUPPORT MEMORY_HOTPLUG MEMORY_HOTREMOVE MFD_DLN2 MFD_RETU MMC MTD MTD_UBI NETFILTER_CONNCOUNT NET_IPGRE NET_IPGRE_DEMUX NFS_V4_1 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 NOP_USB_XCEIV 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_SPLIT_BTF PARPORT PARPORT_NOT_PC PARTITION_ADVANCED PCCARD PCCARD_NONSTATIC PCIEAER PCI_ENDPOINT PCI_IOV PCI_MSI_IRQ_DOMAIN 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 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 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 R8712U RADIO_ADAPTERS RADIO_SHARK RADIO_SHARK2 RADIO_TEA575X RAID6_PQ RAID_ATTRS RANDOM_TRUST_BOOTLOADER RANDOM_TRUST_CPU RC_ATI_REMOTE RC_CORE RC_DEVICES 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_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 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 SMC SMC_DIAG SMSC_PHY 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 SRCU 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 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_FUSB302 TYPEC_TCPCI TYPEC_TCPM TYPEC_TPS6598X TYPEC_UCSI UBIFS_ATIME_SUPPORT UBIFS_FS UBIFS_FS_ADVANCED_COMPR UBIFS_FS_LZO UBIFS_FS_SECURITY UBIFS_FS_XATTR UBIFS_FS_ZLIB UBIFS_FS_ZSTD UBSAN_ONLY_BOUNDS UCSI_ACPI 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_CHAOSKEY USB_CHIPIDEA USB_CHIPIDEA_HOST USB_CHIPIDEA_PCI USB_CHIPIDEA_UDC USB_CONFIGFS USB_CONFIGFS_ACM USB_CONFIGFS_ECM USB_CONFIGFS_ECM_SUBSET USB_CONFIGFS_EEM USB_CONFIGFS_F_FS USB_CONFIGFS_F_HID USB_CONFIGFS_F_LB_SS USB_CONFIGFS_F_MIDI 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 ZONE_DEVICE] disabling configs for [UBSAN BUG LOCKDEP ATOMIC_SLEEP HANG LEAK], they are not needed picked [v6.0 v5.19 v5.18 v5.16 v5.14 v5.12 v5.10 v5.8 v5.5 v5.2 v4.20 v4.19] out of 23 release tags testing release v6.0 testing commit 4fe89d07dcc2804c8b562f6c7896a45643d34b2f gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: f8bc6d15f5c44b1992e7ab97d3a2674f70221af49dedc9a64356325385aa5268 all runs: crashed: KASAN: use-after-free Read in gsm_cleanup_mux representative crash: KASAN: use-after-free Read in gsm_cleanup_mux, types: [KASAN] testing release v5.19 testing commit 3d7cb6b04c3f3115719235cc6866b10326de34cd gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: e1dd45c77b2c6403182ef442c322e7d9976002c5714ae84587ea2f644a24bf47 all runs: OK false negative chance: 0.000 # git bisect start 4fe89d07dcc2804c8b562f6c7896a45643d34b2f 3d7cb6b04c3f3115719235cc6866b10326de34cd Bisecting: 8384 revisions left to test after this (roughly 13 steps) [78acd4ca433425e6dd4032cfc2156c60e34931f2] usb: cdns3: Don't use priv_dev uninitialized in cdns3_gadget_ep_enable() testing commit 78acd4ca433425e6dd4032cfc2156c60e34931f2 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: aeba2bf70c57b31ec448e6de940d2d6f1aa6827431c4c9748ceba3d464a5c378 all runs: OK false negative chance: 0.000 # git bisect good 78acd4ca433425e6dd4032cfc2156c60e34931f2 Bisecting: 4253 revisions left to test after this (roughly 12 steps) [5cef38dd03f33ef206eb792df0fb3b200d762546] dt-bindings: gpio: sifive: add gpio-line-names testing commit 5cef38dd03f33ef206eb792df0fb3b200d762546 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: e2b325fca5739cd12256115d2cbaa60ff0243ed868ec0020b1ee4c8012f02fc0 all runs: OK false negative chance: 0.000 # git bisect good 5cef38dd03f33ef206eb792df0fb3b200d762546 Bisecting: 2131 revisions left to test after this (roughly 11 steps) [90b6b686c1e0273ce6d1724fab9b9651a276217e] Merge tag 'linux-kselftest-next-6.0-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest testing commit 90b6b686c1e0273ce6d1724fab9b9651a276217e gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 9898b8b5f5e807bf482e85a44cabb61dc2ea9d6742d23219be1d73ff28a8a123 all runs: crashed: KASAN: use-after-free Read in gsm_cleanup_mux representative crash: KASAN: use-after-free Read in gsm_cleanup_mux, types: [KASAN] # git bisect bad 90b6b686c1e0273ce6d1724fab9b9651a276217e Bisecting: 1050 revisions left to test after this (roughly 10 steps) [0af5cb349a2c97fbabb3cede96efcde9d54b7940] Merge tag 'kbuild-v5.20' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild testing commit 0af5cb349a2c97fbabb3cede96efcde9d54b7940 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: cd8d00fc5ce71b2ccb628c9c770bc9ad777a02792244f438f9195b6cde59bfac all runs: crashed: KASAN: use-after-free Read in gsm_cleanup_mux representative crash: KASAN: use-after-free Read in gsm_cleanup_mux, types: [KASAN] # git bisect bad 0af5cb349a2c97fbabb3cede96efcde9d54b7940 Bisecting: 556 revisions left to test after this (roughly 9 steps) [1daf117f1d6b5056e27353fa289ef1bbcb619e8d] Merge tag 'f2fs-for-6.0' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs testing commit 1daf117f1d6b5056e27353fa289ef1bbcb619e8d gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: f4fde7dc638a67577f43200e5605890522d94b4f99d4f1ef227ee4bb569a5f4d all runs: OK false negative chance: 0.000 # git bisect good 1daf117f1d6b5056e27353fa289ef1bbcb619e8d Bisecting: 262 revisions left to test after this (roughly 8 steps) [507f811f205c17fd6f64e8d34d4bf91cd01b07a2] Merge tag 'pm-5.20-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm testing commit 507f811f205c17fd6f64e8d34d4bf91cd01b07a2 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 0156d73be8f963e799fccc08a9c39dcb2e2a3b5d8d242c5da99c19ff7b78898f all runs: crashed: KASAN: use-after-free Read in gsm_cleanup_mux representative crash: KASAN: use-after-free Read in gsm_cleanup_mux, types: [KASAN] # git bisect bad 507f811f205c17fd6f64e8d34d4bf91cd01b07a2 Bisecting: 146 revisions left to test after this (roughly 7 steps) [32dd59f96924f45e33bc79854f7a00679c0fa28e] tty: n_gsm: fix race condition in gsmld_write() testing commit 32dd59f96924f45e33bc79854f7a00679c0fa28e gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: cbd3521fab066d70b718f2e0959b7dfa4dba6a08ed7a4224ae8798577b949fdc all runs: crashed: KASAN: use-after-free Read in gsm_cleanup_mux representative crash: KASAN: use-after-free Read in gsm_cleanup_mux, types: [KASAN] # git bisect bad 32dd59f96924f45e33bc79854f7a00679c0fa28e Bisecting: 73 revisions left to test after this (roughly 6 steps) [2b947cf9e335bb1152a3395e461b9c8e94738730] serial: max310x: Fill in rs485_supported testing commit 2b947cf9e335bb1152a3395e461b9c8e94738730 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 6562e2bae257725bd9fe28be8730fad76f9c1859c22c711c3b4b7dcdfc68b8eb all runs: OK false negative chance: 0.000 # git bisect good 2b947cf9e335bb1152a3395e461b9c8e94738730 Bisecting: 36 revisions left to test after this (roughly 5 steps) [d24d7bb2cd947676f9b71fb944d045e09b8b282f] tty: serial: Fix refcount leak bug in ucc_uart.c testing commit d24d7bb2cd947676f9b71fb944d045e09b8b282f gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 8c893fbea35868981bdfe4cffdb0894c9f798f1d2ea8266050a705b094ce6e1a all runs: OK false negative chance: 0.000 # git bisect good d24d7bb2cd947676f9b71fb944d045e09b8b282f Bisecting: 18 revisions left to test after this (roughly 4 steps) [ae50bb2752836277ae15aa4e9d99074d6d947946] serial: take termios_rwsem for ->rs485_config() & pass termios as param testing commit ae50bb2752836277ae15aa4e9d99074d6d947946 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: e44bbd0dddaaa988ee96a5fd2bddf9d02b4aad298aaac1c87e25381bd4019c7c all runs: OK false negative chance: 0.000 # git bisect good ae50bb2752836277ae15aa4e9d99074d6d947946 Bisecting: 9 revisions left to test after this (roughly 3 steps) [808313bc2182ab60761eed82d2c345883fbc65a7] serial: 8250_dw: Drop PM ifdeffery testing commit 808313bc2182ab60761eed82d2c345883fbc65a7 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: d8c7677fecd6862ab545ebfce07923f643180eb4f88ba2ee0f37eb09ee3ebeb0 all runs: OK false negative chance: 0.000 # git bisect good 808313bc2182ab60761eed82d2c345883fbc65a7 Bisecting: 4 revisions left to test after this (roughly 2 steps) [01aecd917114577c423f07cec0d186ad007d76fc] tty: n_gsm: fix tty registration before control channel open testing commit 01aecd917114577c423f07cec0d186ad007d76fc gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a0725abf9480c927451899730d4c9b01d6639048607115a3dbbd453d37f44d67 all runs: crashed: KASAN: use-after-free Read in gsm_cleanup_mux representative crash: KASAN: use-after-free Read in gsm_cleanup_mux, types: [KASAN] # git bisect bad 01aecd917114577c423f07cec0d186ad007d76fc Bisecting: 2 revisions left to test after this (roughly 1 step) [309f7beddf053bd0560b07f3251ac64a5872ecf9] serial: 8250_dw: Use dw8250_serial_out() in dw8250_serial_out38x() testing commit 309f7beddf053bd0560b07f3251ac64a5872ecf9 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: d2c2572c424f9cd3fa1ce90e255c71b77503f70dc29b2dbfe76f74eb66f180bc all runs: OK false negative chance: 0.000 # git bisect good 309f7beddf053bd0560b07f3251ac64a5872ecf9 Bisecting: 0 revisions left to test after this (roughly 1 step) [ac77f0077c3265197d378158c85a55eee6d21508] tty: n_gsm: fix user open not possible at responder until initiator open testing commit ac77f0077c3265197d378158c85a55eee6d21508 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 178645028327a6839bfa1f2927c3ff454c0a8eccdd33570cf5295faa49628f29 all runs: OK false negative chance: 0.000 # git bisect good ac77f0077c3265197d378158c85a55eee6d21508 01aecd917114577c423f07cec0d186ad007d76fc is the first bad commit commit 01aecd917114577c423f07cec0d186ad007d76fc Author: Daniel Starke Date: Fri Jul 1 08:16:45 2022 +0200 tty: n_gsm: fix tty registration before control channel open The current implementation registers/deregisters the user ttys at mux attach/detach. That means that the user devices are available before any control channel is open. However, user channel initialization requires an open control channel. Furthermore, the user is not informed if the mux restarts due to configuration changes. Put the registration/deregistration procedure into separate function to improve readability. Move registration to mux activation and deregistration to mux cleanup to keep the user devices only open as long as a control channel exists. The user will be informed via the device driver if the mux was reconfigured in a way that required a mux re-activation. This makes it necessary to add T2 initialization to gsmld_open() for the ldisc open code path (not the reconfiguration code path) to avoid deletion of an uninitialized T2 at mux cleanup. Fixes: d50f6dcaf22a ("tty: n_gsm: expose gsmtty device nodes at ldisc open time") Signed-off-by: Daniel Starke Link: https://lore.kernel.org/r/20220701061652.39604-2-daniel.starke@siemens.com Signed-off-by: Greg Kroah-Hartman drivers/tty/n_gsm.c | 117 +++++++++++++++++++++++++++++++++++----------------- 1 file changed, 79 insertions(+), 38 deletions(-) accumulated error probability: 0.00 culprit signature: a0725abf9480c927451899730d4c9b01d6639048607115a3dbbd453d37f44d67 parent signature: 178645028327a6839bfa1f2927c3ff454c0a8eccdd33570cf5295faa49628f29 revisions tested: 23, total time: 5h39m10.472947814s (build: 2h28m3.115747898s, test: 2h58m12.699836793s) first bad commit: 01aecd917114577c423f07cec0d186ad007d76fc tty: n_gsm: fix tty registration before control channel open recipients (to): ["daniel.starke@siemens.com" "gregkh@linuxfoundation.org" "gregkh@linuxfoundation.org" "jirislaby@kernel.org" "linux-kernel@vger.kernel.org"] recipients (cc): [] crash: KASAN: use-after-free Read in gsm_cleanup_mux ================================================================== BUG: KASAN: use-after-free in gsm_cleanup_mux+0x5c7/0x5f0 drivers/tty/n_gsm.c:2259 Read of size 4 at addr ffff88800f27400c by task syz-executor.0/1633 CPU: 1 PID: 1633 Comm: syz-executor.0 Not tainted 5.19.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x44/0x60 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:313 [inline] print_report.cold+0x2c0/0x74d mm/kasan/report.c:429 kasan_report+0xdd/0x190 mm/kasan/report.c:491 gsm_cleanup_mux+0x5c7/0x5f0 drivers/tty/n_gsm.c:2259 gsm_config drivers/tty/n_gsm.c:2512 [inline] gsmld_ioctl+0x3ce/0x1030 drivers/tty/n_gsm.c:2827 tty_ioctl+0x5bc/0x1140 drivers/tty/tty_io.c:2787 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __x64_sys_ioctl+0x125/0x190 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 RIP: 0033:0x7fe65367c859 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe6531de0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fe65379c050 RCX: 00007fe65367c859 RDX: 0000000020000040 RSI: 00000000404c4701 RDI: 0000000000000005 RBP: 00007fe6536d8ad0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007fe65379c050 R15: 00007ffc6b12c758 Allocated by task 1625: kasan_save_stack+0x33/0x50 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:436 [inline] ____kasan_kmalloc mm/kasan/common.c:515 [inline] __kasan_kmalloc+0xab/0xd0 mm/kasan/common.c:524 kmalloc include/linux/slab.h:600 [inline] kzalloc include/linux/slab.h:733 [inline] gsm_dlci_alloc+0x41/0x3d0 drivers/tty/n_gsm.c:1832 gsm_activate_mux drivers/tty/n_gsm.c:2313 [inline] gsm_config drivers/tty/n_gsm.c:2536 [inline] gsmld_ioctl+0xad0/0x1030 drivers/tty/n_gsm.c:2827 tty_ioctl+0x5bc/0x1140 drivers/tty/tty_io.c:2787 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __x64_sys_ioctl+0x125/0x190 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 Freed by task 1625: kasan_save_stack+0x33/0x50 mm/kasan/common.c:38 kasan_set_track+0x25/0x30 mm/kasan/common.c:45 kasan_set_free_info+0x24/0x40 mm/kasan/generic.c:370 ____kasan_slab_free mm/kasan/common.c:366 [inline] ____kasan_slab_free+0x125/0x1a0 mm/kasan/common.c:328 kasan_slab_free include/linux/kasan.h:200 [inline] slab_free_hook mm/slub.c:1727 [inline] slab_free_freelist_hook+0xae/0x1e0 mm/slub.c:1753 slab_free mm/slub.c:3507 [inline] kfree+0xcb/0x590 mm/slub.c:4555 dlci_put drivers/tty/n_gsm.c:1888 [inline] gsm_dlci_release drivers/tty/n_gsm.c:1921 [inline] gsm_cleanup_mux+0x27d/0x5f0 drivers/tty/n_gsm.c:2276 gsm_config drivers/tty/n_gsm.c:2512 [inline] gsmld_ioctl+0x3ce/0x1030 drivers/tty/n_gsm.c:2827 tty_ioctl+0x5bc/0x1140 drivers/tty/tty_io.c:2787 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __x64_sys_ioctl+0x125/0x190 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 The buggy address belongs to the object at ffff88800f274000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 12 bytes inside of 2048-byte region [ffff88800f274000, ffff88800f274800) The buggy address belongs to the physical page: page:ffffea00003c9c00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf270 head:ffffea00003c9c00 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffffea0000319000 dead000000000002 ffff888008842000 raw: 0000000000000000 0000000080080008 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 938, tgid 938 (udevd), ts 6695580468, free_ts 6693891901 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x203/0x2f0 mm/page_alloc.c:2449 prep_new_page mm/page_alloc.c:2456 [inline] get_page_from_freelist+0x16fb/0x3410 mm/page_alloc.c:4198 __alloc_pages+0x1d0/0x4c0 mm/page_alloc.c:5426 alloc_slab_page mm/slub.c:1797 [inline] allocate_slab+0x26c/0x390 mm/slub.c:1942 new_slab mm/slub.c:2002 [inline] ___slab_alloc+0x955/0xce0 mm/slub.c:3002 __slab_alloc.constprop.0+0x45/0x80 mm/slub.c:3089 slab_alloc_node mm/slub.c:3180 [inline] __kmalloc_node_track_caller+0x349/0x490 mm/slub.c:4950 kmalloc_reserve net/core/skbuff.c:354 [inline] __alloc_skb+0x8c/0x270 net/core/skbuff.c:426 alloc_skb include/linux/skbuff.h:1426 [inline] netlink_alloc_large_skb net/netlink/af_netlink.c:1191 [inline] netlink_sendmsg+0x848/0xc60 net/netlink/af_netlink.c:1896 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg+0xb2/0xe0 net/socket.c:734 ____sys_sendmsg+0x604/0x810 net/socket.c:2492 ___sys_sendmsg+0xf4/0x170 net/socket.c:2546 __sys_sendmsg+0xdb/0x170 net/socket.c:2575 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1371 [inline] free_pcp_prepare+0x4be/0xc70 mm/page_alloc.c:1421 free_unref_page_prepare mm/page_alloc.c:3343 [inline] free_unref_page+0x1d/0x530 mm/page_alloc.c:3438 __unfreeze_partials+0x193/0x1b0 mm/slub.c:2521 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x17a/0x1a0 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0xa6/0xc0 mm/kasan/common.c:446 kasan_slab_alloc include/linux/kasan.h:224 [inline] slab_post_alloc_hook mm/slab.h:750 [inline] slab_alloc_node mm/slub.c:3214 [inline] slab_alloc mm/slub.c:3222 [inline] __kmem_cache_alloc_lru mm/slub.c:3229 [inline] kmem_cache_alloc+0x244/0x3b0 mm/slub.c:3239 getname_flags.part.0+0x4a/0x430 fs/namei.c:139 do_sys_openat2+0xec/0x410 fs/open.c:1272 do_sys_open fs/open.c:1294 [inline] __do_sys_openat fs/open.c:1310 [inline] __se_sys_openat fs/open.c:1305 [inline] __x64_sys_openat+0x134/0x1d0 fs/open.c:1305 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 Memory state around the buggy address: ffff88800f273f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88800f273f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88800f274000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88800f274080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88800f274100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================