ci2 starts bisection 2026-01-15 12:01:20.049134005 +0000 UTC m=+4314692.226257072
bisecting fixing commit since f6e38ae624cf7eb96fb444a8ca2d07caa8d9c8fe
building syzkaller on 64219f1537429ca826770c4d6f3d49ee6964d16c
ensuring issue is reproducible on original commit f6e38ae624cf7eb96fb444a8ca2d07caa8d9c8fe

testing commit f6e38ae624cf7eb96fb444a8ca2d07caa8d9c8fe gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: 46b863e86fc3ca0ddd1e410cf6060bca46d026a2212c4774351040a2e1bf4c3c
run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #3: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #4: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #5: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #6: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #7: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #8: crashed: BUG: unable to handle kernel paging request in do_sync
run #9: crashed: BUG: unable to handle kernel paging request in do_sync
run #10: crashed: INFO: trying to register non-static key in gfs2_quotad
run #11: crashed: BUG: unable to handle kernel paging request in do_sync
run #12: crashed: BUG: unable to handle kernel paging request in do_sync
run #13: crashed: BUG: unable to handle kernel paging request in do_sync
run #14: crashed: INFO: trying to register non-static key in gfs2_quotad
run #15: crashed: INFO: trying to register non-static key in gfs2_quotad
run #16: crashed: KASAN: use-after-free Read in gfs2_quotad
run #17: crashed: INFO: task hung in gfs2_withdraw
run #18: crashed: INFO: task hung in gfs2_withdraw
run #19: crashed: INFO: task hung in gfs2_withdraw
representative crash: BUG: unable to handle kernel paging request in do_sync, types: [MEMORY_SAFETY_BUG UNKNOWN KASAN-USE-AFTER-FREE-READ]
check whether we can drop unnecessary instrumentation
disabling configs for [atomic_sleep hang memleak ubsan locking], they are not needed
testing commit f6e38ae624cf7eb96fb444a8ca2d07caa8d9c8fe gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: 9840cd1206170ecdf49e9ca9e12f8190f32f89cb7a08601472b5f3956c71254f
run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #3: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #4: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #5: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #6: crashed: INFO: trying to register non-static key in gfs2_quotad
run #7: crashed: INFO: trying to register non-static key in gfs2_quotad
run #8: OK
run #9: OK
representative crash: INFO: trying to register non-static key in gfs2_quotad, types: [UNKNOWN]
unable to determine the verdict: 2 good runs (wanted 5), for bad wanted 5 in total, got 4
kconfig minimization: base=7505 full=9787 leaves diff=2011
split chunks (needed=false): <2011>
split chunk #0 of len 2011 into 5 parts
testing without sub-chunk 1/5
testing commit f6e38ae624cf7eb96fb444a8ca2d07caa8d9c8fe gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: 5beb316637763bd0117811cbdbd9d2750b1ac777be01f88df21eed8d83f2f707
run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #3: crashed: BUG: unable to handle kernel paging request in do_sync
run #4: crashed: BUG: unable to handle kernel paging request in do_sync
run #5: crashed: KASAN: use-after-free Read in do_sync
run #6: crashed: BUG: unable to handle kernel paging request in do_sync
run #7: crashed: KASAN: use-after-free Read in gfs2_quotad
run #8: crashed: KASAN: use-after-free Read in gfs2_quotad
run #9: crashed: INFO: task hung in gfs2_withdraw
representative crash: BUG: unable to handle kernel paging request in do_sync, types: [MEMORY_SAFETY_BUG KASAN-USE-AFTER-FREE-READ]
the chunk can be dropped
testing without sub-chunk 2/5
testing commit f6e38ae624cf7eb96fb444a8ca2d07caa8d9c8fe gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: 4d3cd3d3653ea54e7784ebf0105a3bbf96748c5c82c6eb4fe69a563ad18e61ad
run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #2: OK
run #3: OK
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
false negative chance: 0.000
testing without sub-chunk 3/5
testing commit f6e38ae624cf7eb96fb444a8ca2d07caa8d9c8fe gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: 5184c4ca1fdd0a41277f735b07e6290f674211189e0ed076bcc0c3f68e64bb0f
run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #3: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #4: crashed: BUG: unable to handle kernel paging request in do_sync
run #5: crashed: KASAN: use-after-free Read in quotad_error
run #6: crashed: KASAN: use-after-free Read in do_sync
run #7: crashed: KASAN: use-after-free Read in gfs2_quotad
run #8: crashed: INFO: task hung in gfs2_withdraw
run #9: crashed: INFO: task hung in gfs2_withdraw
representative crash: KASAN: use-after-free Read in quotad_error, types: [KASAN-USE-AFTER-FREE-READ MEMORY_SAFETY_BUG]
the chunk can be dropped
testing without sub-chunk 4/5
testing commit f6e38ae624cf7eb96fb444a8ca2d07caa8d9c8fe gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: c39b424422a4becbf018fb276597f51d2278428fd19207d506a17639cc561c3b
run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #3: crashed: BUG: unable to handle kernel paging request in do_sync
run #4: crashed: KASAN: use-after-free Read in do_sync
run #5: crashed: BUG: unable to handle kernel paging request in do_sync
run #6: crashed: BUG: unable to handle kernel paging request in do_sync
run #7: crashed: BUG: unable to handle kernel paging request in do_sync
run #8: crashed: KASAN: use-after-free Read in gfs2_quotad
run #9: crashed: INFO: task hung in gfs2_withdraw
representative crash: BUG: unable to handle kernel paging request in do_sync, types: [MEMORY_SAFETY_BUG KASAN-USE-AFTER-FREE-READ]
the chunk can be dropped
testing without sub-chunk 5/5
testing commit f6e38ae624cf7eb96fb444a8ca2d07caa8d9c8fe gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: b7625062802ac4aae8dbb09e76070742114bbbe0a5d1b2d5b986a46759dd34de
run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #3: crashed: BUG: unable to handle kernel paging request in do_sync
run #4: crashed: BUG: unable to handle kernel paging request in do_sync
run #5: crashed: BUG: unable to handle kernel paging request in do_sync
run #6: crashed: BUG: unable to handle kernel paging request in do_sync
run #7: crashed: BUG: unable to handle kernel paging request in do_sync
run #8: crashed: KASAN: use-after-free Read in gfs2_quotad
run #9: crashed: INFO: trying to register non-static key in gfs2_quotad
representative crash: BUG: unable to handle kernel paging request in do_sync, types: [MEMORY_SAFETY_BUG KASAN-USE-AFTER-FREE-READ]
the chunk can be dropped
minimized to 403 configs; suspects: [6LOWPAN ACPI_VIDEO DLM DRM DRM_BRIDGE DRM_TIDSS DRM_TI_SN65DSI86 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_CXUSB_ANALOG 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 EXTCON_USBC_TUSB320 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 GNSS_USB 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 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_BIGBEN_FF HID_CMEDIA HID_CORSAIR HID_COUGAR HID_CP2112 HID_CREATIVE_SB0540 HID_ELAN HID_ELECOM HID_ELO HID_EMS_FF HID_FT260 HID_GEMBIRD HID_GFRM HID_GLORIOUS HID_GREENASIA HID_GT683R HID_GYRATION HID_HOLTEK HID_ICADE HID_JABRA HID_KEYTOUCH HID_KYE HID_LCPOWER HID_LED HID_LENOVO HID_LETSKETCH HID_LOGITECH_DJ HID_LOGITECH_HIDPP HID_MACALLY HID_MAGICMOUSE HID_MALTRON HID_MAYFLASH HID_MCP2221 HID_MEGAWORLD_FF 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_PXRC HID_RAZER HID_RETRODE HID_RMI HID_ROCCAT HID_SAITEK HID_SAMSUNG HID_SEMITEK HID_SENSOR_ACCEL_3D HID_SENSOR_ALS HID_SENSOR_CUSTOM_INTEL_HINGE 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_SIGMAMICRO HID_SPEEDLINK HID_STEAM HID_STEELSERIES HID_SUNPLUS HID_THINGM HID_TIVO HID_TOPRE HID_TOPSEED HID_TWINHAN HID_U2FZERO HID_UCLOGIC HID_UDRAW_PS3 HID_VIEWSONIC HID_VIVALDI HID_VIVALDI_COMMON HID_VRC2 HID_WACOM HID_WALTOP HID_WIIMOTE HID_XIAOMI HID_XINMO HID_ZYDACRON HMM_MIRROR HOLTEK_FF HOTPLUG_PCI_PCIE HPFS_FS I2C_CP2615 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_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_IMON_RAW IR_MCEUSB IR_REDRAT3 IR_STREAMZAP IR_TOY IR_TTUSBIR ISDN ISDN_CAPI_MIDDLEWARE 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 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 RADIO_ADAPTERS RADIO_SI4713 RFKILL SND SND_SOC SOUND WAN XFRM ZONE_DEVICE]
testing current HEAD bec0e10ee67efbd0ad36281745a3edea4fcd8dc2
testing commit bec0e10ee67efbd0ad36281745a3edea4fcd8dc2 gcc
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
kernel signature: eea975bc4b1339451bac554841c73e304b036cab255d08beb06cb2c3a7b6d34c
run #0: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #1: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #2: basic kernel testing failed: SYZFAIL: failed to recv rpc
run #3: crashed: BUG: unable to handle kernel paging request in do_sync
run #4: crashed: KASAN: use-after-free Read in quotad_error
run #5: crashed: BUG: unable to handle kernel paging request in do_sync
run #6: crashed: BUG: unable to handle kernel paging request in do_sync
run #7: crashed: BUG: unable to handle kernel paging request in do_sync
run #8: crashed: BUG: unable to handle kernel paging request in do_sync
run #9: crashed: KASAN: use-after-free Read in gfs2_quotad
representative crash: BUG: unable to handle kernel paging request in do_sync, types: [MEMORY_SAFETY_BUG KASAN-USE-AFTER-FREE-READ]
crash still not fixed/happens on the oldest tested release
revisions tested: 8, total time: 2h34m49.256588293s (build: 1h27m11.430099626s, test: 1h4m7.387094536s)
crash still not fixed or there were kernel test errors
commit msg: Linux 6.1.160
crash: BUG: unable to handle kernel paging request in do_sync
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850
Unable to handle kernel paging request at virtual address dfff800000000002
KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]
Mem abort info:
  ESR = 0x0000000096000006
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x06: level 2 translation fault
Data abort info:
  ISV = 0, ISS = 0x00000006
  CM = 0, WnR = 0
[dfff800000000002] address between user and kernel address ranges
Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 4441 Comm: gfs2_quotad Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : do_sync+0x6dc/0x8e4 fs/gfs2/quota.c:986
lr : do_sync+0x6b8/0x8e4 fs/gfs2/quota.c:985
sp : ffff80001a8a7ae0
x29: ffff80001a8a7c10 x28: ffff0000dbbc40c8 x27: ffff700003514f64
x26: ffff0000df9084b0 x25: 00000000fffffffb x24: dfff800000000000
x23: ffff0000d9a16800 x22: ffff0000cc5e0a00 x21: ffff0000df908000
x20: 0000000000000000 x19: 0000000000000000 x18: 0000000000000000
x17: ffff800009158dec x16: ffff800008649834 x15: ffff8000087401ac
x14: ffff800008746f80 x13: ffff800008018584 x12: ffff80001a8a0000
x11: 0000000000000003 x10: 0000000000000003 x9 : f73ff78fe00b0200
x8 : 0000000000000002 x7 : ffff80000874d8c0 x6 : ffff80000874b1dc
x5 : ffff0000cb572db8 x4 : ffff80001a8a7780 x3 : 0000000000000000
x2 : 0000000000000006 x1 : ffff80000d789dc0 x0 : 0000000000000010
Call trace:
 do_sync+0x6dc/0x8e4 fs/gfs2/quota.c:986
 gfs2_quota_sync+0x28c/0x408 fs/gfs2/quota.c:1329
 quotad_check_timeo fs/gfs2/quota.c:1519 [inline]
 gfs2_quotad+0x2f0/0x440 fs/gfs2/quota.c:1566
 kthread+0x210/0x28c kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850
Code: 97d7d445 f9400294 91004280 d343fc08 (38786908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	97d7d445 	bl	0xffffffffff5f5114
   4:	f9400294 	ldr	x20, [x20]
   8:	91004280 	add	x0, x20, #0x10
   c:	d343fc08 	lsr	x8, x0, #3
* 10:	38786908 	ldrb	w8, [x8, x24] <-- trapping instruction