ci2 starts bisection 2023-09-11 04:23:36.375878963 +0000 UTC m=+224004.649203616 bisecting fixing commit since e84a4e368abe42cf359fe237f0238820859d5044 building syzkaller on 4cd5bb25a2752a9a5b25597d1da34656681f07a6 ensuring issue is reproducible on original commit e84a4e368abe42cf359fe237f0238820859d5044 testing commit e84a4e368abe42cf359fe237f0238820859d5044 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: e9a254b12df0ba161da2bbf6f480fae36ceb899f24abdfa650b170572680d52e 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 [HANG LEAK UBSAN BUG LOCKDEP ATOMIC_SLEEP], they are not needed testing commit e84a4e368abe42cf359fe237f0238820859d5044 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: fedc7c17c966525240ef42595d0f9c38d2e32a6e9ec463dd8fa667a8e0b07b28 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 [HANG LEAK UBSAN BUG LOCKDEP ATOMIC_SLEEP], they are not needed kconfig minimization: base=3820 full=7523 leaves diff=1995 split chunks (needed=false): <1995> split chunk #0 of len 1995 into 5 parts testing without sub-chunk 1/5 disabling configs for [HANG LEAK UBSAN BUG LOCKDEP ATOMIC_SLEEP], they are not needed testing commit e84a4e368abe42cf359fe237f0238820859d5044 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 2556d3f1f4ff54dbf3cf1aa950595da8decbeefc12bcf74df8ab83c2446ad1c1 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 [UBSAN BUG LOCKDEP ATOMIC_SLEEP HANG LEAK], they are not needed testing commit e84a4e368abe42cf359fe237f0238820859d5044 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 77b1ea783d01d508b1c934e49d109b9ad6c197cbef22ee489b471d94d638d490 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 [ATOMIC_SLEEP HANG LEAK UBSAN BUG LOCKDEP], they are not needed testing commit e84a4e368abe42cf359fe237f0238820859d5044 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 56844edf53d8119e195f0ddb7bfe9acc05aa10bd67e4ae849eb257905364fc77 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 [HANG LEAK UBSAN BUG LOCKDEP ATOMIC_SLEEP], they are not needed testing commit e84a4e368abe42cf359fe237f0238820859d5044 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 19b6c29d3bece8a6f5ae6ba7e562c91c8661082a070fd7950b19ca449c706e0a 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 e84a4e368abe42cf359fe237f0238820859d5044 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 9799a7387aa936fd70ad10a4bebd194d9c0d89b9bcccaf86a5e12b7f84aa5e73 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 399 configs; suspects: [AF_RXRPC ARCH_ENABLE_MEMORY_HOTREMOVE ATM AX25 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 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 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 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 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 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 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_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 [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed testing current HEAD 59b13c2b647e464dd85622c89d7f16c15d681e96 testing commit 59b13c2b647e464dd85622c89d7f16c15d681e96 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 759764e3e02053b82c48f3915914e3d37dccd538f093a1b1e0f29b2dfc9433ea all runs: OK false negative chance: 0.000 # git bisect start 59b13c2b647e464dd85622c89d7f16c15d681e96 e84a4e368abe42cf359fe237f0238820859d5044 Bisecting: 1064 revisions left to test after this (roughly 10 steps) [b5359d7a5087ac398fc429da6833133b4784c268] drm/client: Fix memory leak in drm_client_target_cloned determine whether the revision contains the guilty commit revision e84a4e368abe42cf359fe237f0238820859d5044 crashed and is reachable testing commit b5359d7a5087ac398fc429da6833133b4784c268 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 604515152565cab39d8c409e8a0d25965782e68958b4e1cdbda332756cffd83d 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 good b5359d7a5087ac398fc429da6833133b4784c268 Bisecting: 532 revisions left to test after this (roughly 9 steps) [5a8a35b71bd34570983505bcdc16c9456e8970d0] mtd: rawnand: rockchip: fix oobfree offset and description determine whether the revision contains the guilty commit revision e84a4e368abe42cf359fe237f0238820859d5044 crashed and is reachable testing commit 5a8a35b71bd34570983505bcdc16c9456e8970d0 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7b0b0dac8a1ad7a848ded2514099b824d8b9d926905bbab12bdd8b7bd561c582 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 good 5a8a35b71bd34570983505bcdc16c9456e8970d0 Bisecting: 266 revisions left to test after this (roughly 8 steps) [9f68e2105dd96cf0fafffffafb2337fbd0fbae1f] btrfs: fix incorrect splitting in btrfs_drop_extent_map_range determine whether the revision contains the guilty commit revision e84a4e368abe42cf359fe237f0238820859d5044 crashed and is reachable testing commit 9f68e2105dd96cf0fafffffafb2337fbd0fbae1f gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: bf7c4b48f3897f64ebcc1070cf88f7c4dab2a0518a0bf618e381e4620eb9af08 all runs: OK false negative chance: 0.000 # git bisect bad 9f68e2105dd96cf0fafffffafb2337fbd0fbae1f Bisecting: 132 revisions left to test after this (roughly 7 steps) [4276f3e7ae4a1cfbe01cc807deca680bb9853026] net/mlx5: LAG, Check correct bucket when modifying LAG determine whether the revision contains the guilty commit revision e84a4e368abe42cf359fe237f0238820859d5044 crashed and is reachable testing commit 4276f3e7ae4a1cfbe01cc807deca680bb9853026 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 4b704df4c26b4612fb3aec955b022e2722b08bfb1b54712d9862ce49d4810ba9 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 good 4276f3e7ae4a1cfbe01cc807deca680bb9853026 Bisecting: 66 revisions left to test after this (roughly 6 steps) [5fe7815e784bf21061885f8112a7108aef5c45bd] RDMA/mlx5: Return the firmware result upon destroying QP/RQ determine whether the revision contains the guilty commit revision b5359d7a5087ac398fc429da6833133b4784c268 crashed and is reachable testing commit 5fe7815e784bf21061885f8112a7108aef5c45bd gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b4532ff3f52d459f8b72905f7ecba9b2f65e061ef40b429a060253a1be91b32a 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 good 5fe7815e784bf21061885f8112a7108aef5c45bd Bisecting: 33 revisions left to test after this (roughly 5 steps) [c48616e52d5d5a225de5d7c02daa34c68056c273] ALSA: hda/realtek: Add quirk for ASUS ROG GX650P determine whether the revision contains the guilty commit revision 5a8a35b71bd34570983505bcdc16c9456e8970d0 crashed and is reachable testing commit c48616e52d5d5a225de5d7c02daa34c68056c273 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a623833e5e80319b11526fddcddd384c376c5eb65fb4cbc09b12a069b6cbc1d2 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 good c48616e52d5d5a225de5d7c02daa34c68056c273 Bisecting: 16 revisions left to test after this (roughly 4 steps) [6297644db23f77c02ae7961cc542d162629ae2c4] btrfs: fix use-after-free of new block group that became unused determine whether the revision contains the guilty commit revision c48616e52d5d5a225de5d7c02daa34c68056c273 crashed and is reachable testing commit 6297644db23f77c02ae7961cc542d162629ae2c4 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: d857ed916d5b1ab7a4adf3525e36ad7bdebca1401dad6975a6e3567c2dd098ab 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 good 6297644db23f77c02ae7961cc542d162629ae2c4 Bisecting: 8 revisions left to test after this (roughly 3 steps) [3461e6492ca28253edfcd13d176d2b9b24c0ed53] i2c: tegra: Fix i2c-tegra DMA config option processing determine whether the revision contains the guilty commit revision 5a8a35b71bd34570983505bcdc16c9456e8970d0 crashed and is reachable testing commit 3461e6492ca28253edfcd13d176d2b9b24c0ed53 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a05fa805548f57232f4577e1a306f0c67cb7a79ec5815e6fd20fb85fd3d0780f 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 good 3461e6492ca28253edfcd13d176d2b9b24c0ed53 Bisecting: 4 revisions left to test after this (roughly 2 steps) [8ad9bc25cbdcec72e7ca43dd8281decb69ea9a70] vdpa: Add queue index attr to vdpa_nl_policy for nlattr length check determine whether the revision contains the guilty commit revision b5359d7a5087ac398fc429da6833133b4784c268 crashed and is reachable testing commit 8ad9bc25cbdcec72e7ca43dd8281decb69ea9a70 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 304398128f7874914d051cf197f28885cbeb0ba9088e7fa65c27434541995492 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 good 8ad9bc25cbdcec72e7ca43dd8281decb69ea9a70 Bisecting: 2 revisions left to test after this (roughly 1 step) [d6aa03bda8c0ce5a340e33d37e0cb480b40fde08] vdpa: Enable strict validation for netlinks ops determine whether the revision contains the guilty commit revision c48616e52d5d5a225de5d7c02daa34c68056c273 crashed and is reachable testing commit d6aa03bda8c0ce5a340e33d37e0cb480b40fde08 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: fad8ad64e5fe4bbeb4ccde67f70aca8c19d0e13c368dc298698b76dd612fa082 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 good d6aa03bda8c0ce5a340e33d37e0cb480b40fde08 Bisecting: 0 revisions left to test after this (roughly 1 step) [0693c8f134f97f8973621be76b17be8efbe17589] tty: serial: fsl_lpuart: Clear the error flags by writing 1 for lpuart32 platforms determine whether the revision contains the guilty commit revision 3461e6492ca28253edfcd13d176d2b9b24c0ed53 crashed and is reachable testing commit 0693c8f134f97f8973621be76b17be8efbe17589 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: f9f951bbc10b1bf2fe3dbaccdff423af8eb5388e429c54c0fc67ae73343e8dde all runs: OK false negative chance: 0.000 # git bisect bad 0693c8f134f97f8973621be76b17be8efbe17589 Bisecting: 0 revisions left to test after this (roughly 0 steps) [31311a9a4baae0ad47c85e448af21b2120344ff0] tty: n_gsm: fix the UAF caused by race condition in gsm_cleanup_mux determine whether the revision contains the guilty commit revision b5359d7a5087ac398fc429da6833133b4784c268 crashed and is reachable testing commit 31311a9a4baae0ad47c85e448af21b2120344ff0 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: ee04093a3f2df831eb5438358b29570e175dc841312f2e362ec7d6dd88f9ca6e all runs: OK false negative chance: 0.000 # git bisect bad 31311a9a4baae0ad47c85e448af21b2120344ff0 31311a9a4baae0ad47c85e448af21b2120344ff0 is the first bad commit commit 31311a9a4baae0ad47c85e448af21b2120344ff0 Author: Yi Yang Date: Fri Aug 11 11:11:21 2023 +0800 tty: n_gsm: fix the UAF caused by race condition in gsm_cleanup_mux commit 3c4f8333b582487a2d1e02171f1465531cde53e3 upstream. In commit 9b9c8195f3f0 ("tty: n_gsm: fix UAF in gsm_cleanup_mux"), the UAF problem is not completely fixed. There is a race condition in gsm_cleanup_mux(), which caused this UAF. The UAF problem is triggered by the following race: task[5046] task[5054] ----------------------- ----------------------- gsm_cleanup_mux(); dlci = gsm->dlci[0]; mutex_lock(&gsm->mutex); gsm_cleanup_mux(); dlci = gsm->dlci[0]; //Didn't take the lock gsm_dlci_release(gsm->dlci[i]); gsm->dlci[i] = NULL; mutex_unlock(&gsm->mutex); mutex_lock(&gsm->mutex); dlci->dead = true; //UAF Fix it by assigning values after mutex_lock(). Link: https://syzkaller.appspot.com/text?tag=CrashReport&x=176188b5a80000 Cc: stable Fixes: 9b9c8195f3f0 ("tty: n_gsm: fix UAF in gsm_cleanup_mux") Fixes: aa371e96f05d ("tty: n_gsm: fix restart handling via CLD command") Signed-off-by: Yi Yang Co-developed-by: Qiumiao Zhang Signed-off-by: Qiumiao Zhang Link: https://lore.kernel.org/r/20230811031121.153237-1-yiyang13@huawei.com Signed-off-by: Greg Kroah-Hartman drivers/tty/n_gsm.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) accumulated error probability: 0.00 culprit signature: ee04093a3f2df831eb5438358b29570e175dc841312f2e362ec7d6dd88f9ca6e parent signature: fad8ad64e5fe4bbeb4ccde67f70aca8c19d0e13c368dc298698b76dd612fa082 revisions tested: 20, total time: 3h4m24.173914562s (build: 1h16m45.559803197s, test: 1h41m13.468465743s) first good commit: 31311a9a4baae0ad47c85e448af21b2120344ff0 tty: n_gsm: fix the UAF caused by race condition in gsm_cleanup_mux recipients (to): ["gregkh@linuxfoundation.org" "yiyang13@huawei.com" "zhangqiumiao1@huawei.com"] recipients (cc): []