ci2 starts bisection 2024-07-01 00:18:38.273018902 +0000 UTC m=+211268.771361825
bisecting fixing commit since 61adba85cc40287232a539e607164f273260e0fe
building syzkaller on d615901c739a765329b688494cee2f8e1b5037cb
ensuring issue is reproducible on original commit 61adba85cc40287232a539e607164f273260e0fe

testing commit 61adba85cc40287232a539e607164f273260e0fe gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 1df6e58dd7a23a697a67ef02ab2b901252084de48587432a4d22cd9673d3da1e
run #0: infra problem: create instance operation failed: &{Code:QUOTA_EXCEEDED ErrorDetails:[0xc002dac780] Location: Message:Quota 'T2A_CPUS' exceeded.  Limit: 125.0 in region us-central1. ForceSendFields:[] NullFields:[]}.
run #1: infra problem: create instance operation failed: &{Code:QUOTA_EXCEEDED ErrorDetails:[0xc0073e0730] Location: Message:Quota 'T2A_CPUS' exceeded.  Limit: 125.0 in region us-central1. ForceSendFields:[] NullFields:[]}.
run #2: infra problem: create instance operation failed: &{Code:QUOTA_EXCEEDED ErrorDetails:[0xc0073e0eb0] Location: Message:Quota 'T2A_CPUS' exceeded.  Limit: 125.0 in region us-central1. ForceSendFields:[] NullFields:[]}.
run #3: infra problem: create instance operation failed: &{Code:QUOTA_EXCEEDED ErrorDetails:[0xc006e8ae60] Location: Message:Quota 'T2A_CPUS' exceeded.  Limit: 125.0 in region us-central1. ForceSendFields:[] NullFields:[]}.
run #4: infra problem: create instance operation failed: &{Code:QUOTA_EXCEEDED ErrorDetails:[0xc006e8b130] Location: Message:Quota 'T2A_CPUS' exceeded.  Limit: 125.0 in region us-central1. ForceSendFields:[] NullFields:[]}.
run #5: infra problem: create instance operation failed: &{Code:QUOTA_EXCEEDED ErrorDetails:[0xc006e8b6d0] Location: Message:Quota 'T2A_CPUS' exceeded.  Limit: 125.0 in region us-central1. ForceSendFields:[] NullFields:[]}.
run #6: crashed: WARNING in vkms_get_vblank_timestamp
run #7: crashed: WARNING in vkms_get_vblank_timestamp
run #8: crashed: WARNING in vkms_get_vblank_timestamp
run #9: crashed: INFO: rcu detected stall in corrupted
run #10: crashed: INFO: rcu detected stall in corrupted
run #11: crashed: INFO: rcu detected stall in corrupted
run #12: crashed: INFO: rcu detected stall in corrupted
run #13: crashed: INFO: rcu detected stall in corrupted
run #14: crashed: INFO: rcu detected stall in corrupted
run #15: crashed: INFO: rcu detected stall in corrupted
run #16: crashed: INFO: rcu detected stall in corrupted
run #17: crashed: INFO: rcu detected stall in corrupted
run #18: crashed: no output from test machine
run #19: crashed: no output from test machine
representative crash: INFO: rcu detected stall in corrupted, types: [HANG WARNING]
check whether we can drop unnecessary instrumentation
disabling configs for [LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP], they are not needed
testing commit 61adba85cc40287232a539e607164f273260e0fe gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: faf464ed6bcd201ae9ad4d5cd049c12908d6163f0f8c5c7d2ba04cb85e9f1603
run #0: crashed: WARNING in vkms_get_vblank_timestamp
run #1: crashed: WARNING in vkms_get_vblank_timestamp
run #2: crashed: WARNING in vkms_get_vblank_timestamp
run #3: crashed: WARNING in vkms_get_vblank_timestamp
run #4: crashed: WARNING in vkms_get_vblank_timestamp
run #5: crashed: WARNING in vkms_get_vblank_timestamp
run #6: crashed: WARNING in vkms_get_vblank_timestamp
run #7: crashed: WARNING in vkms_get_vblank_timestamp
run #8: crashed: INFO: rcu detected stall in corrupted
run #9: crashed: INFO: rcu detected stall in corrupted
representative crash: WARNING in vkms_get_vblank_timestamp, types: [WARNING]
the bug reproduces without the instrumentation
disabling configs for [ATOMIC_SLEEP LEAK UBSAN KASAN LOCKDEP], they are not needed
kconfig minimization: base=7493 full=9693 leaves diff=1929
split chunks (needed=false): <1929>
split chunk #0 of len 1929 into 5 parts
testing without sub-chunk 1/5
disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN], they are not needed
testing commit 61adba85cc40287232a539e607164f273260e0fe gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 09f2d05f3d58172598418978448672b4016102076ab1aae04a61b1a23855e8cb
run #0: crashed: WARNING in vkms_get_vblank_timestamp
run #1: crashed: WARNING in vkms_get_vblank_timestamp
run #2: crashed: WARNING in vkms_get_vblank_timestamp
run #3: crashed: WARNING in vkms_get_vblank_timestamp
run #4: crashed: WARNING in vkms_get_vblank_timestamp
run #5: crashed: INFO: rcu detected stall in corrupted
run #6: crashed: INFO: rcu detected stall in corrupted
run #7: crashed: INFO: rcu detected stall in corrupted
run #8: crashed: no output from test machine
run #9: crashed: no output from test machine
representative crash: WARNING in vkms_get_vblank_timestamp, types: [WARNING UNKNOWN]
the chunk can be dropped
testing without sub-chunk 2/5
disabling configs for [LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP], they are not needed
testing commit 61adba85cc40287232a539e607164f273260e0fe gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: c03ac6dadaec6207466bded5b7a30f3cd17faeabb21297f3a686a6a89da32804
all runs: boot failed: can't ssh into the instance
unable to determine the verdict: 0 good runs (wanted 5), for bad wanted 5 in total, got 0
testing without sub-chunk 3/5
disabling configs for [LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP], they are not needed
testing commit 61adba85cc40287232a539e607164f273260e0fe gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 33e468112606949591a59630d3d2ae135f89f45417002a3ac5e03b8358ce3577
run #0: crashed: WARNING in vkms_get_vblank_timestamp
run #1: crashed: WARNING in vkms_get_vblank_timestamp
run #2: crashed: WARNING in vkms_get_vblank_timestamp
run #3: crashed: WARNING in vkms_get_vblank_timestamp
run #4: crashed: WARNING in vkms_get_vblank_timestamp
run #5: crashed: WARNING in vkms_get_vblank_timestamp
run #6: crashed: WARNING in vkms_get_vblank_timestamp
run #7: crashed: WARNING in vkms_get_vblank_timestamp
run #8: crashed: no output from test machine
run #9: crashed: no output from test machine
representative crash: WARNING in vkms_get_vblank_timestamp, types: [WARNING]
the chunk can be dropped
testing without sub-chunk 4/5
disabling configs for [ATOMIC_SLEEP LEAK UBSAN KASAN LOCKDEP], they are not needed
testing commit 61adba85cc40287232a539e607164f273260e0fe gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 83fc2b06630d2b91754e668bc2ba26bc224a10749f9ce193ac0e67140fe34d58
all runs: crashed: WARNING in vkms_get_vblank_timestamp
representative crash: WARNING in vkms_get_vblank_timestamp, types: [WARNING]
the chunk can be dropped
testing without sub-chunk 5/5
disabling configs for [LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP], they are not needed
testing commit 61adba85cc40287232a539e607164f273260e0fe gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 377e2be42ad5796720ab3b0231a58367118bba2d5fbe646986f9ab0d44433747
run #0: crashed: WARNING in vkms_get_vblank_timestamp
run #1: crashed: WARNING in vkms_get_vblank_timestamp
run #2: crashed: WARNING in vkms_get_vblank_timestamp
run #3: crashed: WARNING in vkms_get_vblank_timestamp
run #4: crashed: WARNING in vkms_get_vblank_timestamp
run #5: crashed: WARNING in vkms_get_vblank_timestamp
run #6: crashed: WARNING in vkms_get_vblank_timestamp
run #7: crashed: WARNING in vkms_get_vblank_timestamp
run #8: crashed: no output from test machine
run #9: crashed: no output from test machine
representative crash: WARNING in vkms_get_vblank_timestamp, types: [WARNING]
the chunk can be dropped
minimized to 386 configs; suspects: [6LOWPAN ACPI_VIDEO DLM DRM DRM_TTM DRM_TTM_HELPER DRM_UDL DRM_V3D DRM_VC4 DRM_VGEM DRM_VIRTIO_GPU DRM_VKMS DRM_VRAM_HELPER DUMMY DVB_AF9013 DVB_AF9033 DVB_AS102 DVB_AS102_FE DVB_B2C2_FLEXCOP DVB_B2C2_FLEXCOP_USB DVB_DIB3000MB DVB_DIB3000MC DVB_EC100 DVB_GP8PSK_FE DVB_RTL2830 DVB_RTL2832 DVB_RTL2832_SDR DVB_TEST_DRIVERS DVB_TTUSB_BUDGET DVB_TTUSB_DEC DVB_USB DVB_USB_A800 DVB_USB_AF9005 DVB_USB_AF9005_REMOTE DVB_USB_AF9015 DVB_USB_AF9035 DVB_USB_ANYSEE DVB_USB_AU6610 DVB_USB_AZ6007 DVB_USB_AZ6027 DVB_USB_CE6230 DVB_USB_CINERGY_T2 DVB_USB_CXUSB DVB_USB_DIB0700 DVB_USB_DIB3000MC DVB_USB_DIBUSB_MB DVB_USB_DIBUSB_MC DVB_USB_DIGITV DVB_USB_DTT200U DVB_USB_DTV5100 DVB_USB_DVBSKY DVB_USB_DW2102 DVB_USB_EC168 DVB_USB_GL861 DVB_USB_GP8PSK DVB_USB_LME2510 DVB_USB_M920X DVB_USB_MXL111SF DVB_USB_NOVA_T_USB2 DVB_USB_OPERA1 DVB_USB_PCTV452E DVB_USB_RTL28XXU DVB_USB_TECHNISAT_USB2 DVB_USB_TTUSB2 DVB_USB_UMT_010 DVB_USB_V2 DVB_USB_VP702X DVB_USB_VP7045 DVB_USB_ZD1301 DVB_VIDTV DVB_ZL10353 E100 ECRYPT_FS ECRYPT_FS_MESSAGING EEPROM_93CX6 EFS_FS ENCRYPTED_KEYS EQUALIZER EROFS_FS EROFS_FS_POSIX_ACL EROFS_FS_SECURITY EROFS_FS_XATTR EROFS_FS_ZIP EVM EVM_ADD_XATTRS EVM_ATTR_FSUUID EXFAT_FS EXPORTFS_BLOCK_OPS EXT3_FS_POSIX_ACL EXT3_FS_SECURITY EXT4_FS_SECURITY F2FS_CHECK_FS F2FS_FAULT_INJECTION F2FS_FS F2FS_FS_COMPRESSION F2FS_FS_LZ4 F2FS_FS_LZ4HC F2FS_FS_LZO F2FS_FS_LZORLE F2FS_FS_POSIX_ACL F2FS_FS_SECURITY F2FS_FS_XATTR F2FS_FS_ZSTD F2FS_STAT_FS FB_DEFERRED_IO FB_SYS_COPYAREA FB_SYS_FILLRECT FB_SYS_FOPS FB_SYS_IMAGEBLIT FB_TILEBLITTING FB_VIRTUAL FDDI FIB_RULES FIREWIRE FIREWIRE_NET FIREWIRE_OHCI FIREWIRE_SBP2 FRAMEBUFFER_CONSOLE_ROTATION FRONTSWAP FS_DAX FS_DAX_PMD FS_ENCRYPTION FS_ENCRYPTION_ALGS FS_VERITY FS_VERITY_BUILTIN_SIGNATURES FTL FW_LOADER_COMPRESS FW_LOADER_USER_HELPER_FALLBACK GACT_PROB GET_FREE_REGION GFS2_FS GFS2_FS_LOCKING_DLM GOOGLE_COREBOOT_TABLE GOOGLE_FIRMWARE GOOGLE_MEMCONSOLE GOOGLE_MEMCONSOLE_COREBOOT GOOGLE_VPD GPIO_DLN2 GPIO_VIPERBOARD GREENASIA_FF GREYBUS GREYBUS_BRIDGED_PHY GREYBUS_ES2 GREYBUS_HID GREYBUS_USB GTP GVE HAVE_ARCH_USERFAULTFD_MINOR HAVE_IMA_KEXEC HDLC HDLC_CISCO HDLC_FR HDLC_PPP HDLC_RAW HDLC_RAW_ETH HDLC_X25 HDMI HFSPLUS_FS HFS_FS HIDRAW HID_ACCUTOUCH HID_ACRUX HID_ACRUX_FF HID_ALPS HID_APPLEIR HID_ASUS HID_AUREAL HID_BATTERY_STRENGTH HID_BETOP_FF HID_CMEDIA HID_CORSAIR HID_CP2112 HID_ELECOM HID_ELO HID_EMS_FF HID_GEMBIRD HID_GFRM HID_GREENASIA HID_GT683R HID_GYRATION HID_HOLTEK HID_ICADE HID_KEYTOUCH HID_KYE HID_LCPOWER HID_LED HID_LENOVO HID_LOGITECH_DJ HID_LOGITECH_HIDPP HID_MAGICMOUSE HID_MAYFLASH HID_NTI HID_NTRIG HID_ORTEK HID_PENMOUNT HID_PETALYNX HID_PICOLCD HID_PICOLCD_BACKLIGHT HID_PICOLCD_CIR HID_PICOLCD_FB HID_PICOLCD_LCD HID_PICOLCD_LEDS HID_PID HID_PLANTRONICS HID_PRIMAX HID_PRODIKEYS HID_RETRODE HID_RMI HID_ROCCAT HID_SAITEK HID_SAMSUNG HID_SENSOR_ACCEL_3D HID_SENSOR_ALS HID_SENSOR_CUSTOM_SENSOR HID_SENSOR_DEVICE_ROTATION HID_SENSOR_GYRO_3D HID_SENSOR_HUB HID_SENSOR_HUMIDITY HID_SENSOR_IIO_COMMON HID_SENSOR_IIO_TRIGGER HID_SENSOR_INCLINOMETER_3D HID_SENSOR_MAGNETOMETER_3D HID_SENSOR_PRESS HID_SENSOR_PROX HID_SENSOR_TEMP HID_SPEEDLINK HID_STEELSERIES HID_SUNPLUS HID_THINGM HID_TIVO HID_TOPSEED HID_TWINHAN HID_UCLOGIC HID_UDRAW_PS3 HID_WACOM HID_WALTOP HID_WIIMOTE HID_XINMO HID_ZYDACRON HMM_MIRROR HOLTEK_FF HOTPLUG_PCI_PCIE HPFS_FS I2C_DIOLAN_U2C I2C_DLN2 I2C_MUX_REG I2C_ROBOTFUZZ_OSIF I2C_SI4713 I2C_SLAVE_EEPROM I2C_TINY_USB I2C_VIPERBOARD IEEE802154 IEEE802154_6LOWPAN IEEE802154_ATUSB IEEE802154_DRIVERS IEEE802154_HWSIM IEEE802154_NL802154_EXPERIMENTAL IEEE802154_SOCKET IFB IMA IMA_APPRAISE IMA_APPRAISE_MODSIG IMA_DEFAULT_HASH_SHA256 IMA_LSM_RULES IMA_MEASURE_ASYMMETRIC_KEYS IMA_NG_TEMPLATE IMA_QUEUE_EARLY_BOOT_KEYS IMA_READ_POLICY IMA_WRITE_POLICY INET6_AH INET6_ESP INET6_ESPINTCP INET6_ESP_OFFLOAD INET6_IPCOMP INET6_TUNNEL INET6_XFRM_TUNNEL INET_AH INET_DCCP_DIAG INET_DIAG_DESTROY INET_ESP INET_ESPINTCP INET_ESP_OFFLOAD INET_IPCOMP INET_MPTCP_DIAG INET_RAW_DIAG INET_SCTP_DIAG INET_UDP_DIAG INET_XFRM_TUNNEL INFINIBAND INFINIBAND_ADDR_TRANS INFINIBAND_ADDR_TRANS_CONFIGFS INFINIBAND_IPOIB INFINIBAND_IPOIB_CM INFINIBAND_IPOIB_DEBUG INFINIBAND_ISER INFINIBAND_ON_DEMAND_PAGING INFINIBAND_RTRS INFINIBAND_SRP INFINIBAND_USER_ACCESS INFINIBAND_USER_MAD INFINIBAND_USER_MEM INPUT_ATI_REMOTE2 INPUT_CM109 INPUT_IMS_PCU INPUT_JOYDEV INPUT_JOYSTICK INPUT_KEYSPAN_REMOTE INPUT_LEDS INPUT_MOUSEDEV INPUT_MOUSEDEV_PSAUX INPUT_POWERMATE INPUT_UINPUT INPUT_YEALINK INTEGRITY INTEGRITY_ASYMMETRIC_KEYS INTEGRITY_AUDIT INTEGRITY_SIGNATURE INTEGRITY_TRUSTED_KEYRING IP6_NF_MATCH_AH IP6_NF_MATCH_EUI64 IP6_NF_MATCH_FRAG IP6_NF_MATCH_HL IP6_NF_MATCH_IPV6HEADER IP6_NF_MATCH_MH IP6_NF_MATCH_OPTS IP6_NF_MATCH_RPFILTER IP6_NF_MATCH_RT IP6_NF_MATCH_SRH IP6_NF_RAW IP6_NF_SECURITY IP6_NF_TARGET_HL IP6_NF_TARGET_NPT IP6_NF_TARGET_SYNPROXY IPV6_FOU IPV6_FOU_TUNNEL IPV6_GRE IPV6_ILA IPV6_MIP6 IPV6_MROUTE IPV6_MROUTE_MULTIPLE_TABLES IPV6_MULTIPLE_TABLES IPV6_OPTIMISTIC_DAD IPV6_PIMSM_V2 IPV6_ROUTER_PREF IPV6_ROUTE_INFO IPV6_RPL_LWTUNNEL IPV6_SEG6_BPF IPV6_SEG6_HMAC IPV6_SEG6_LWTUNNEL IPV6_SIT_6RD IPV6_SUBTREES IPV6_TUNNEL IPV6_VTI IPVLAN IPVLAN_L3S IPVTAP IP_ADVANCED_ROUTER IP_DCCP IP_DCCP_CCID3 IP_DCCP_TFRC_LIB IP_FIB_TRIE_STATS IP_MROUTE IP_MROUTE_COMMON IP_MROUTE_MULTIPLE_TABLES IP_NF_ARPFILTER IP_NF_ARPTABLES IP_NF_ARP_MANGLE IP_NF_MATCH_AH IP_NF_MATCH_ECN IP_NF_MATCH_RPFILTER IP_NF_MATCH_TTL IP_NF_RAW IP_NF_SECURITY IP_NF_TARGET_CLUSTERIP IP_NF_TARGET_ECN IP_NF_TARGET_NETMAP IP_NF_TARGET_REDIRECT IP_NF_TARGET_SYNPROXY IP_NF_TARGET_TTL IP_PIMSM_V1 IP_PIMSM_V2 IP_PNP_RARP IP_ROUTE_CLASSID IP_ROUTE_MULTIPATH IP_ROUTE_VERBOSE IP_SCTP IP_SET IP_SET_BITMAP_IP IP_SET_BITMAP_IPMAC IP_SET_BITMAP_PORT IP_SET_HASH_IP IP_SET_HASH_IPMAC IP_SET_HASH_IPMARK IP_SET_HASH_IPPORT IP_SET_HASH_IPPORTIP IP_SET_HASH_IPPORTNET IP_SET_HASH_MAC IP_SET_HASH_NET IP_SET_HASH_NETIFACE IP_SET_HASH_NETNET IP_SET_HASH_NETPORT IP_SET_HASH_NETPORTNET IP_SET_LIST_SET IP_VS_DH IP_VS_FO IP_VS_FTP IP_VS_IPV6 IP_VS_LBLC IP_VS_LBLCR IP_VS_LC IP_VS_MH IP_VS_NFCT IP_VS_NQ IP_VS_OVF IP_VS_PE_SIP IP_VS_PROTO_AH IP_VS_PROTO_AH_ESP IP_VS_PROTO_ESP IP_VS_PROTO_SCTP IP_VS_PROTO_TCP IP_VS_PROTO_UDP IP_VS_RR IP_VS_SED IP_VS_SH IP_VS_TWOS IP_VS_WLC IP_VS_WRR IR_IGORPLUGUSB IR_IGUANA IR_IMON IR_MCEUSB IR_REDRAT3 IR_STREAMZAP IR_TTUSBIR ISDN ISDN_CAPI_MIDDLEWARE ISO9660_FS JFFS2_CMODE_PRIORITY JFFS2_COMPRESSION_OPTIONS JFFS2_FS JFFS2_FS_POSIX_ACL JFFS2_FS_SECURITY JFFS2_FS_WRITEBUFFER JFFS2_FS_XATTR JFFS2_LZO JFFS2_RTIME JFFS2_RUBIN JFFS2_SUMMARY JFFS2_ZLIB JFS_DEBUG JFS_FS JFS_POSIX_ACL JFS_SECURITY JOLIET JOYSTICK_IFORCE JOYSTICK_IFORCE_USB JOYSTICK_XPAD JOYSTICK_XPAD_FF JOYSTICK_XPAD_LEDS KARMA_PARTITION KCOV KCOV_ENABLE_COMPARISONS KCOV_INSTRUMENT_ALL LAPB LCD_CLASS_DEVICE MAC802154 MEDIA_RADIO_SUPPORT MEDIA_TEST_SUPPORT MFD_DLN2 MFD_VIPERBOARD MPTCP NET_IPGRE_DEMUX NFT_FWD_NETDEV NF_CONNTRACK_FTP NF_CONNTRACK_SIP NF_TABLES NF_TABLES_NETDEV PARTITION_ADVANCED RADIO_ADAPTERS RADIO_SI4713 RFKILL SND SND_SOC SOUND WAN XFRM ZONE_DEVICE]
disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN], they are not needed
testing current HEAD 99e6a620de00b96f059c9e7f14b5795ca0c6b125
testing commit 99e6a620de00b96f059c9e7f14b5795ca0c6b125 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: d854c7e39bfc5718bb5129429af0d161cee9f72f89fdf3e5edf5b03c16e559e2
run #0: crashed: WARNING in vkms_get_vblank_timestamp
run #1: crashed: WARNING in vkms_get_vblank_timestamp
run #2: crashed: WARNING in vkms_get_vblank_timestamp
run #3: crashed: WARNING in vkms_get_vblank_timestamp
run #4: crashed: WARNING in vkms_get_vblank_timestamp
run #5: crashed: WARNING in vkms_get_vblank_timestamp
run #6: crashed: WARNING in vkms_get_vblank_timestamp
run #7: crashed: WARNING in vkms_get_vblank_timestamp
run #8: crashed: WARNING in vkms_get_vblank_timestamp
run #9: crashed: no output from test machine
representative crash: WARNING in vkms_get_vblank_timestamp, types: [WARNING]
crash still not fixed/happens on the oldest tested release
revisions tested: 8, total time: 1h45m36.207732163s (build: 44m49.160000452s, test: 55m47.005279103s)
crash still not fixed or there were kernel test errors
commit msg: Linux 6.1.96
crash: WARNING in vkms_get_vblank_timestamp
------------[ cut here ]------------
WARNING: CPU: 0 PID: 3967 at drivers/gpu/drm/vkms/vkms_crtc.c:103 vkms_get_vblank_timestamp+0xb4/0xbc drivers/gpu/drm/vkms/vkms_crtc.c:103
Modules linked in:
CPU: 0 PID: 3967 Comm: syz-executor.3 Not tainted 6.1.96-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
pstate: 804000c5 (Nzcv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : vkms_get_vblank_timestamp+0xb4/0xbc drivers/gpu/drm/vkms/vkms_crtc.c:103
lr : vkms_get_vblank_timestamp+0xb4/0xbc drivers/gpu/drm/vkms/vkms_crtc.c:103
sp : ffff8000115b36b0
x29: ffff8000115b36b0 x28: ffff80000b20ecd0 x27: ffff8000092a94bc
x26: ffff0000c2d3dc80 x25: 0000000000004e20 x24: 0000000000000000
x23: ffff0000c2d3dc80 x22: ffff0000c5c02000 x21: 000000097f80f6f1
x20: 000000097f80f6f1 x19: ffff8000115b3708 x18: 0000000000000000
x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000
x14: 0000000000000001 x13: ffff0000c5049940 x12: ffff80000d194000
x11: 0000000000ff0100 x10: 0000000000000000 x9 : ffff8000092a9570
x8 : ffff0000c5049940 x7 : 0000000000000000 x6 : ffff80000922bc74
x5 : 0000000000000000 x4 : 0000000000000080 x3 : 0000000000000000
x2 : ffff8000115b3708 x1 : 000000097f80f6f1 x0 : 000000097f80f6f1
Call trace:
 vkms_get_vblank_timestamp+0xb4/0xbc drivers/gpu/drm/vkms/vkms_crtc.c:103
 drm_get_last_vbltimestamp drivers/gpu/drm/drm_vblank.c:881 [inline]
 drm_update_vblank_count+0xf4/0x5c4 drivers/gpu/drm/drm_vblank.c:303
 drm_vblank_disable_and_save+0x7c/0x164 drivers/gpu/drm/drm_vblank.c:477
 drm_crtc_vblank_off+0x114/0x3ec drivers/gpu/drm/drm_vblank.c:1325
 vkms_crtc_atomic_disable+0x20/0x30 drivers/gpu/drm/vkms/vkms_crtc.c:234
 disable_outputs drivers/gpu/drm/drm_atomic_helper.c:1227 [inline]
 drm_atomic_helper_commit_modeset_disables+0x490/0x908 drivers/gpu/drm/drm_atomic_helper.c:1431
 vkms_atomic_commit_tail+0x30/0x104 drivers/gpu/drm/vkms/vkms_drv.c:71
 commit_tail+0x100/0x21c drivers/gpu/drm/drm_atomic_helper.c:1803
 drm_atomic_helper_commit+0x328/0x32c drivers/gpu/drm/drm_atomic_helper.c:2043
 drm_atomic_commit+0xe4/0x11c drivers/gpu/drm/drm_atomic.c:1452
 drm_client_modeset_commit_atomic+0x26c/0x3a0 drivers/gpu/drm/drm_client_modeset.c:1056
 drm_client_modeset_commit_locked+0x6c/0x290 drivers/gpu/drm/drm_client_modeset.c:1159
 drm_client_modeset_commit+0x34/0x60 drivers/gpu/drm/drm_client_modeset.c:1185
 __drm_fb_helper_restore_fbdev_mode_unlocked drivers/gpu/drm/drm_fb_helper.c:253 [inline]
 drm_fb_helper_restore_fbdev_mode_unlocked drivers/gpu/drm/drm_fb_helper.c:280 [inline]
 drm_fb_helper_lastclose drivers/gpu/drm/drm_fb_helper.c:2106 [inline]
 drm_fbdev_client_restore+0x90/0xd0 drivers/gpu/drm/drm_fb_helper.c:2518
 drm_client_dev_restore+0x80/0x130 drivers/gpu/drm/drm_client.c:247
 drm_lastclose drivers/gpu/drm/drm_file.c:462 [inline]
 drm_release+0x18c/0x24c drivers/gpu/drm/drm_file.c:493
 __fput+0x180/0x3cc fs/file_table.c:320
 ____fput+0x20/0x30 fs/file_table.c:348
 task_work_run+0xf4/0x128 kernel/task_work.c:179
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 do_notify_resume+0x14e8/0x1e84 arch/arm64/kernel/signal.c:1132
 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline]
 el0_svc+0x60/0x110 arch/arm64/kernel/entry-common.c:638
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
---[ end trace 0000000000000000 ]---