ci2 starts bisection 2023-10-15 21:24:04.658769156 +0000 UTC m=+195969.241543004
bisecting fixing commit since 92901222f83d988617aee37680cb29e1a743b5e4
building syzkaller on 696ea0d2f4fdaa17db929e152edba19bf7666d84
ensuring issue is reproducible on original commit 92901222f83d988617aee37680cb29e1a743b5e4
testing commit 92901222f83d988617aee37680cb29e1a743b5e4 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 24241a916c81ca2700a2816484edb9f6918ae36413b54687019df25c8ab2d4eb
all runs: crashed: INFO: task hung in write_cache_pages
representative crash: INFO: task hung in write_cache_pages, types: [HANG]
check whether we can drop unnecessary instrumentation
disabling configs for [LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG KASAN], they are not needed
testing commit 92901222f83d988617aee37680cb29e1a743b5e4 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 2ea54d98ccdfb5b5c1c7e754094bc9229905d1de7db4b589b68107aecdcc01e0
all runs: crashed: INFO: task hung in write_cache_pages
representative crash: INFO: task hung in write_cache_pages, types: [HANG]
the bug reproduces without the instrumentation
disabling configs for [ATOMIC_SLEEP LEAK UBSAN BUG KASAN LOCKDEP], they are not needed
kconfig minimization: base=3876 full=7683 leaves diff=2020
split chunks (needed=false): <2020>
split chunk #0 of len 2020 into 5 parts
testing without sub-chunk 1/5
disabling configs for [UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK], they are not needed
testing commit 92901222f83d988617aee37680cb29e1a743b5e4 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 43a2ade0f85562a0a7e4d7766e9774a9d07244e8d87dc97e635d73e24df5ac72
all runs: crashed: INFO: task hung in write_cache_pages
representative crash: INFO: task hung in write_cache_pages, types: [HANG]
the chunk can be dropped
testing without sub-chunk 2/5
disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed
testing commit 92901222f83d988617aee37680cb29e1a743b5e4 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: eb2c56cccd4f3f88f275a43202b2f3e200d7d1ca76c35a09fa8cc8bffe1de27a
all runs: OK
false negative chance: 0.000
testing without sub-chunk 3/5
disabling configs for [UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK], they are not needed
testing commit 92901222f83d988617aee37680cb29e1a743b5e4 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: d872bc5fdbc10b500cf4047d5d6c4ac93a3f6920d05ed0834ab06b6c508b58e3
all runs: crashed: INFO: task hung in write_cache_pages
representative crash: INFO: task hung in write_cache_pages, types: [HANG]
the chunk can be dropped
testing without sub-chunk 4/5
disabling configs for [LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG KASAN], they are not needed
testing commit 92901222f83d988617aee37680cb29e1a743b5e4 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 922c98e1b11aa1768cbfd3b5151149c68c6b9d4d60879fc7cd7120fad43d6e2d
all runs: crashed: INFO: task hung in write_cache_pages
representative crash: INFO: task hung in write_cache_pages, types: [HANG]
the chunk can be dropped
testing without sub-chunk 5/5
disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG], they are not needed
testing commit 92901222f83d988617aee37680cb29e1a743b5e4 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: d2122089408391552e891d334ee4e1516a821aad2745c6fdf361b420104d0e9c
all runs: crashed: INFO: task hung in write_cache_pages
representative crash: INFO: task hung in write_cache_pages, types: [HANG]
the chunk can be dropped
minimized to 404 configs; suspects: [6LOWPAN ARCH_ENABLE_MEMORY_HOTREMOVE ASUS_WMI BLK_DEV_ZONED CMA COMMON_CLK DAX DLM DM_VERITY DM_VERITY_FEC DM_WRITECACHE DM_ZONED DRAGONRISE_FF DRM DRM_BOCHS DRM_BRIDGE DRM_BUDDY DRM_CIRRUS_QEMU DRM_DEBUG_MM DRM_DISPLAY_DP_HELPER DRM_DISPLAY_HDCP_HELPER DRM_DISPLAY_HDMI_HELPER DRM_DISPLAY_HELPER DRM_DP_AUX_BUS DRM_DP_AUX_CHARDEV DRM_FBDEV_EMULATION DRM_GEM_SHMEM_HELPER DRM_I915 DRM_I915_CAPTURE_ERROR DRM_I915_COMPRESS_ERROR DRM_I915_USERPTR DRM_KMS_HELPER DRM_MIPI_DSI DRM_PANEL DRM_PANEL_BRIDGE DRM_PANEL_EDP DRM_PANEL_ORIENTATION_QUIRKS DRM_SIMPLEDRM DRM_TTM DRM_TTM_HELPER DRM_UDL DRM_VGEM DRM_VIRTIO_GPU DRM_VIRTIO_GPU_KMS DRM_VKMS DRM_VMWGFX DRM_VRAM_HELPER DUMMY DVB_AF9013 DVB_AF9033 DVB_AS102 DVB_AS102_FE DVB_B2C2_FLEXCOP DVB_B2C2_FLEXCOP_USB DVB_CORE 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 ECRYPT_FS ECRYPT_FS_MESSAGING EDAC 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 EVM_EXTRA_SMACK_XATTRS EXFAT_FS EXPORTFS_BLOCK_OPS EXT3_FS EXT3_FS_POSIX_ACL EXT3_FS_SECURITY EXTCON EXTCON_INTEL_CHT_WC 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 FANOTIFY FANOTIFY_ACCESS_PERMISSIONS FB FB_CFB_COPYAREA FB_CFB_FILLRECT FB_CFB_IMAGEBLIT FB_CORE FB_DEFERRED_IO FB_DEVICE FB_IOMEM_HELPERS FB_NOTIFY FB_SYSMEM_HELPERS FB_SYSMEM_HELPERS_DEFERRED FB_SYS_COPYAREA FB_SYS_FILLRECT FB_SYS_FOPS FB_SYS_IMAGEBLIT FB_TILEBLITTING FB_VESA FB_VGA16 FB_VIRTUAL FDDI FIREWIRE FIREWIRE_NET FIREWIRE_OHCI FIREWIRE_SBP2 FONT_8x16 FONT_8x8 FONT_SUPPORT FRAMEBUFFER_CONSOLE FRAMEBUFFER_CONSOLE_DETECT_PRIMARY FRAMEBUFFER_CONSOLE_ROTATION FS_DAX FS_DAX_PMD FS_ENCRYPTION FS_ENCRYPTION_ALGS FS_VERITY FS_VERITY_BUILTIN_SIGNATURES FTL FUSE_DAX FUSE_FS FW_LOADER_COMPRESS FW_LOADER_PAGED_BUF FW_LOADER_SYSFS FW_LOADER_USER_HELPER FW_LOADER_USER_HELPER_FALLBACK GACT_PROB GARP GENERIC_PHY GET_FREE_REGION GFS2_FS GFS2_FS_LOCKING_DLM GOOGLE_COREBOOT_TABLE GOOGLE_FIRMWARE GOOGLE_MEMCONSOLE GOOGLE_MEMCONSOLE_COREBOOT GOOGLE_VPD GPIOLIB GPIOLIB_IRQCHIP GPIO_ACPI GPIO_DLN2 GPIO_VIPERBOARD GREENASIA_FF GREYBUS GREYBUS_BRIDGED_PHY GREYBUS_ES2 GREYBUS_HID GREYBUS_USB GTP GUEST_PERF_EVENTS GVE HAVE_ARCH_NODE_DEV_GROUP HAVE_ARCH_USERFAULTFD_MINOR HAVE_ARCH_USERFAULTFD_WP HAVE_BOOTMEM_INFO_NODE HAVE_CLK_PREPARE HAVE_KVM_CPU_RELAX_INTERCEPT HAVE_KVM_DIRTY_RING HAVE_KVM_DIRTY_RING_ACQ_REL HAVE_KVM_DIRTY_RING_TSO HAVE_KVM_EVENTFD HAVE_KVM_IRQCHIP HAVE_KVM_IRQFD HAVE_KVM_IRQ_BYPASS HAVE_KVM_IRQ_ROUTING HAVE_KVM_MSI HAVE_KVM_NO_POLL HAVE_KVM_PFNCACHE HAVE_KVM_PM_NOTIFIER HAVE_SCHED_AVG_IRQ HDLC HDLC_CISCO HDLC_FR HDLC_PPP HDLC_RAW HDLC_RAW_ETH HDLC_X25 HDMI HFSPLUS_FS HFS_FS 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_DRAGONRISE HID_ELECOM HID_ELO HID_EMS_FF HID_GEMBIRD HID_GFRM HID_GREENASIA HID_GT683R 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_MULTITOUCH HID_NTI HID_ORTEK HID_PENMOUNT HID_PICOLCD HID_PICOLCD_BACKLIGHT HID_PICOLCD_CIR HID_PICOLCD_FB HID_PICOLCD_LCD HID_PICOLCD_LEDS HID_PLANTRONICS HID_PRIMAX HID_PRODIKEYS HID_RETRODE HID_RMI HID_ROCCAT HID_SAITEK 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_THINGM HID_TIVO HID_TWINHAN HID_UCLOGIC HID_UDRAW_PS3 HID_WACOM HID_WALTOP HID_WIIMOTE HID_XINMO HID_ZYDACRON HMM_MIRROR HOLTEK_FF HOTPLUG_PCI_PCIE HPET_MMAP HPET_MMAP_DEFAULT HPFS_FS I2C_ALGOBIT I2C_CHARDEV I2C_DESIGNWARE_CORE I2C_DESIGNWARE_PLATFORM I2C_DIOLAN_U2C I2C_DLN2 I2C_MUX I2C_MUX_REG I2C_ROBOTFUZZ_OSIF I2C_SI4713 I2C_SLAVE I2C_SLAVE_EEPROM I2C_TINY_USB I2C_VIPERBOARD IEEE802154 IEEE802154_6LOWPAN IEEE802154_ATUSB IEEE802154_DRIVERS IEEE802154_HWSIM IEEE802154_NL802154_EXPERIMENTAL IEEE802154_SOCKET IFB IIO IIO_BUFFER IIO_KFIFO_BUF IIO_TRIGGER IIO_TRIGGERED_BUFFER IKCONFIG IKCONFIG_PROC 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_ESPINTCP INET6_ESP_OFFLOAD INET6_IPCOMP INET6_TUNNEL INET6_XFRM_TUNNEL INET_AH INET_DCCP_DIAG INET_DIAG INET_DIAG_DESTROY INET_ESP INET_ESPINTCP INET_ESP_OFFLOAD INET_IPCOMP INET_MPTCP_DIAG INET_RAW_DIAG INET_SCTP_DIAG INET_TCP_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 INTEL_IDMA64 INTEL_IOATDMA INTEL_IOMMU_DEFAULT_ON INTEL_IOMMU_SVM INTEL_ISH_HID INTEL_SOC_PMIC_CHTWC INTERVAL_TREE INTERVAL_TREE_SPAN_ITER IOMMUFD IOMMUFD_TEST IOMMU_SVA IP6_NF_MATCH_AH IP6_NF_MATCH_EUI64 IP6_NF_MATCH_FRAG IP6_NF_MATCH_HL IP6_NF_MATCH_MH IP6_NF_MATCH_OPTS IP6_NF_MATCH_RPFILTER IP6_NF_MATCH_RT IP6_NF_MATCH_SRH IP6_NF_NAT IP6_NF_RAW IP6_NF_SECURITY IP6_NF_TARGET_HL IP6_NF_TARGET_MASQUERADE 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_DCCP IP_DCCP_CCID3 IP_DCCP_TFRC_LIB IP_FIB_TRIE_STATS 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_ECN IP_NF_TARGET_NETMAP IP_NF_TARGET_REDIRECT IP_NF_TARGET_SYNPROXY IP_NF_TARGET_TTL IP_ROUTE_CLASSID 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 IP_VS_DH IP_VS_FO IP_VS_FTP IP_VS_IPV6 IP_VS_LBLC IP_VS_PROTO_TCP IRQ_TIME_ACCOUNTING LAPB LCD_CLASS_DEVICE MAC802154 MEDIA_DIGITAL_TV_SUPPORT MEDIA_RADIO_SUPPORT MEDIA_SDR_SUPPORT MEDIA_SUPPORT MEDIA_TEST_SUPPORT MEDIA_USB_SUPPORT MEMORY_HOTPLUG MEMORY_HOTREMOVE MFD_DLN2 MFD_VIPERBOARD MPTCP MTD NETFILTER_ADVANCED NET_ACT_GACT NET_ACT_MIRRED NET_IPGRE_DEMUX NFT_FWD_NETDEV NF_TABLES NF_TABLES_NETDEV RADIO_ADAPTERS RADIO_SI4713 RAS RC_CORE RFKILL SND SOUND STAGING TRANSPARENT_HUGEPAGE VIDEO_DEV VIRTIO_FS WAN ZONE_DEVICE]
disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG], they are not needed
testing current HEAD 58720809f52779dc0f08e53e54b014209d13eebb
testing commit 58720809f52779dc0f08e53e54b014209d13eebb gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: fe3b1734f9bc43a09bc437bb6b47d02d60b1f79b0e7a00877f655a4a4c1e4707
all runs: crashed: INFO: task hung in write_cache_pages
representative crash: INFO: task hung in write_cache_pages, types: [HANG]
crash still not fixed/happens on the oldest tested release
revisions tested: 8, total time: 1h51m11.132315528s (build: 40m9.646071648s, test: 1h6m2.457575854s)
crash still not fixed or there were kernel test errors
commit msg: Linux 6.6-rc6
crash: INFO: task hung in write_cache_pages
INFO: task kworker/u4:6:1111 blocked for more than 143 seconds.
Not tainted 6.6.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:6 state:D stack:13336 pid:1111 ppid:2 flags:0x00004000
Workqueue: writeback wb_workfn (flush-7:0)
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x6ad/0x980 kernel/sched/core.c:6695
schedule+0x54/0xc0 kernel/sched/core.c:6771
io_schedule+0x3e/0x60 kernel/sched/core.c:9026
folio_wait_bit_common+0x1e5/0x490 mm/filemap.c:1301
folio_lock include/linux/pagemap.h:1042 [inline]
write_cache_pages+0x1f9/0x610 mm/page-writeback.c:2441
iomap_writepages+0x1e/0x90 fs/iomap/buffered-io.c:1985
gfs2_writepages+0xd8/0x110 fs/gfs2/aops.c:191
do_writepages+0xc9/0x220 mm/page-writeback.c:2553
__writeback_single_inode+0x44/0x3a0 fs/fs-writeback.c:1608
writeback_sb_inodes+0x372/0x700 fs/fs-writeback.c:1899
__writeback_inodes_wb+0x93/0xe0 fs/fs-writeback.c:1970
wb_writeback+0x172/0x3e0 fs/fs-writeback.c:2077
wb_check_background_flush fs/fs-writeback.c:2147 [inline]
wb_do_writeback fs/fs-writeback.c:2235 [inline]
wb_workfn+0x3d8/0x510 fs/fs-writeback.c:2262
process_one_work kernel/workqueue.c:2630 [inline]
process_scheduled_works+0x24c/0x4d0 kernel/workqueue.c:2703
worker_thread+0x23d/0x300 kernel/workqueue.c:2784
kthread+0xe5/0x100 kernel/kthread.c:388
ret_from_fork+0x2e/0x40 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
INFO: task syz-executor.0:2553 blocked for more than 143 seconds.
Not tainted 6.6.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:13624 pid:2553 ppid:2139 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x6ad/0x980 kernel/sched/core.c:6695
schedule+0x54/0xc0 kernel/sched/core.c:6771
io_schedule+0x3e/0x60 kernel/sched/core.c:9026
folio_wait_bit_common+0x1e5/0x490 mm/filemap.c:1301
folio_lock include/linux/pagemap.h:1042 [inline]
write_cache_pages+0x1f9/0x610 mm/page-writeback.c:2441
iomap_writepages+0x1e/0x90 fs/iomap/buffered-io.c:1985
gfs2_writepages+0xd8/0x110 fs/gfs2/aops.c:191
do_writepages+0xc9/0x220 mm/page-writeback.c:2553
filemap_fdatawrite_wbc+0x60/0x80 mm/filemap.c:390
__filemap_fdatawrite_range mm/filemap.c:423 [inline]
__filemap_fdatawrite mm/filemap.c:429 [inline]
filemap_fdatawrite+0xa4/0xc0 mm/filemap.c:434
gfs2_ordered_write fs/gfs2/log.c:740 [inline]
gfs2_log_flush+0x268/0xb00 fs/gfs2/log.c:1098
gfs2_trans_end+0x144/0x250 fs/gfs2/trans.c:158
gfs2_page_mkwrite+0x530/0x6a0 fs/gfs2/file.c:533
do_page_mkwrite+0x45/0xe0 mm/memory.c:2931
do_shared_fault mm/memory.c:4647 [inline]
do_fault mm/memory.c:4709 [inline]
do_pte_missing mm/memory.c:3669 [inline]
handle_pte_fault mm/memory.c:4978 [inline]
__handle_mm_fault mm/memory.c:5119 [inline]
handle_mm_fault+0xb37/0x1630 mm/memory.c:5284
do_user_addr_fault arch/x86/mm/fault.c:1413 [inline]
handle_page_fault arch/x86/mm/fault.c:1505 [inline]
exc_page_fault+0x32d/0x760 arch/x86/mm/fault.c:1561
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x7f215542b331
RSP: 002b:00007fffc632dad0 EFLAGS: 00010246
RAX: 0000000020000180 RBX: 0000000000000004 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000555556d52360
RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000
R10: 00007fffc632dc40 R11: 0000000000000246 R12: 00007f2155012930
R13: fffffffffffffffe R14: 00007f2155000000 R15: 00007f2155012938
Showing all locks held in the system:
1 lock held by khungtaskd/28:
#0: ffffffff831d85c0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:303 [inline]
#0: ffffffff831d85c0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:749 [inline]
#0: ffffffff831d85c0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x30/0x100 kernel/locking/lockdep.c:6613
3 locks held by kworker/u4:6/1111:
#0: ffff888103670738 ((wq_completion)writeback){....}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline]
#0: ffff888103670738 ((wq_completion)writeback){....}-{0:0}, at: process_scheduled_works+0x1f2/0x4d0 kernel/workqueue.c:2703
#1: ffffc90002ddfe58 ((work_completion)(&(&wb->dwork)->work)){....}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline]
#1: ffffc90002ddfe58 ((work_completion)(&(&wb->dwork)->work)){....}-{0:0}, at: process_scheduled_works+0x1f2/0x4d0 kernel/workqueue.c:2703
#2: ffff88810de420e0 (&type->s_umount_key#48){....}-{3:3}, at: super_trylock_shared+0x16/0x50 fs/super.c:607
2 locks held by getty/1515:
#0: ffff88810ea548a0 (&tty->ldisc_sem){....}-{0:0}, at: tty_ldisc_ref_wait+0x20/0x40 drivers/tty/tty_ldisc.c:243
#1: ffffc9000351b2f0 (&ldata->atomic_read_lock){....}-{3:3}, at: n_tty_read+0x218/0x8e0 drivers/tty/n_tty.c:2206
4 locks held by syz-executor.0/2553:
#0: ffff888104775920 (&mm->mmap_lock){....}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:165 [inline]
#0: ffff888104775920 (&mm->mmap_lock){....}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:5311 [inline]
#0: ffff888104775920 (&mm->mmap_lock){....}-{3:3}, at: lock_mm_and_find_vma+0x25/0x130 mm/memory.c:5371
#1: ffff88810de424f8 (sb_pagefaults){....}-{0:0}, at: do_page_mkwrite+0x45/0xe0 mm/memory.c:2931
#2: ffff88810de425f0 (sb_internal#2){....}-{0:0}, at: gfs2_trans_begin+0x42/0x70 fs/gfs2/trans.c:118
#3: ffff88810afd9058 (&sdp->sd_log_flush_lock){....}-{3:3}, at: gfs2_log_flush+0x3f/0xb00 fs/gfs2/log.c:1042
1 lock held by gfs2_logd/syz:s/2556:
#0: ffff88810afd9058 (&sdp->sd_log_flush_lock){....}-{3:3}, at: gfs2_log_flush+0x3f/0xb00 fs/gfs2/log.c:1042
4 locks held by syz-executor.0/5683:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.6.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x83/0xd0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x142/0x160 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x8e/0x140 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0x5da/0x600 kernel/hung_task.c:379
kthread+0xe5/0x100 kernel/kthread.c:388
ret_from_fork+0x2e/0x40 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5685 Comm: syz-executor.0 Not tainted 6.6.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
RIP: 0033:0x7f45e7a286eb
Code: cd 48 01 c1 49 39 4f 08 72 4c 8d 4d ff 85 ed 74 33 66 0f 1f 44 00 00 48 39 f0 72 1b 4d 8b 07 49 89 c1 49 29 f1 47 0f b6 0c 08 <45> 84 c9 74 08 45 88 0c 00 49 8b 47 10 48 83 c0 01 49 89 47 10 83
RSP: 002b:00007f45e88a9520 EFLAGS: 00000202
RAX: 00000000007eb793 RBX: 00007f45e88a95c0 RCX: 00000000000000cb
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 00007f45e88a9660
RBP: 0000000000000102 R08: 00007f45df200000 R09: 0000000000000000
R10: 0000000000000000 R11: 00007f45e88a95d0 R12: 0000000000000001
R13: 00007f45e7aea360 R14: 0000000000000000 R15: 00007f45e88a9660
FS: 00007f45e88aa6c0 GS: 0000000000000000