Extracting prog: 6m14.190853621s Minimizing prog: 1h3m59.987753859s Simplifying prog options: 7m10.090691756s Extracting C: 3m32.071481875s Simplifying C: 0s extracting reproducer from 1 programs testing a last program of every proc single: executing 1 programs separately with timeout 6m0s testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-pwrite64 detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000180)='./sys\x00', 0xb3) mount(0x0, &(0x7f0000000000)='./sys\x00', &(0x7f0000000040)='sysfs\x00', 0x0, 0x0) r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./sys/bus/pci/devices/0000:00:03.0/config\x00', 0x2, 0x0) pwrite64(r0, &(0x7f00000000c0)="02", 0x1, 0x4) program crashed: INFO: task hung in jbd2_journal_commit_transaction single: successfully extracted reproducer found reproducer with 4 syscalls minimizing guilty program testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000180)='./sys\x00', 0xb3) mount(0x0, &(0x7f0000000000)='./sys\x00', &(0x7f0000000040)='sysfs\x00', 0x0, 0x0) openat(0xffffffffffffff9c, &(0x7f0000000080)='./sys/bus/pci/devices/0000:00:03.0/config\x00', 0x2, 0x0) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-pwrite64 detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000180)='./sys\x00', 0xb3) mount(0x0, &(0x7f0000000000)='./sys\x00', &(0x7f0000000040)='sysfs\x00', 0x0, 0x0) pwrite64(0xffffffffffffffff, &(0x7f00000000c0)="02", 0x1, 0x4) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-openat-pwrite64 detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000180)='./sys\x00', 0xb3) r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./sys/bus/pci/devices/0000:00:03.0/config\x00', 0x2, 0x0) pwrite64(r0, &(0x7f00000000c0)="02", 0x1, 0x4) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mount-openat-pwrite64 detailed listing: executing program 0: mount(0x0, &(0x7f0000000000)='./sys\x00', &(0x7f0000000040)='sysfs\x00', 0x0, 0x0) r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./sys/bus/pci/devices/0000:00:03.0/config\x00', 0x2, 0x0) pwrite64(r0, &(0x7f00000000c0)="02", 0x1, 0x4) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-pwrite64 detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, 0x0, 0xb3) mount(0x0, &(0x7f0000000000)='./sys\x00', &(0x7f0000000040)='sysfs\x00', 0x0, 0x0) r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./sys/bus/pci/devices/0000:00:03.0/config\x00', 0x2, 0x0) pwrite64(r0, &(0x7f00000000c0)="02", 0x1, 0x4) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-pwrite64 detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000180)='./sys\x00', 0xb3) mount(0x0, 0x0, &(0x7f0000000040)='sysfs\x00', 0x0, 0x0) r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./sys/bus/pci/devices/0000:00:03.0/config\x00', 0x2, 0x0) pwrite64(r0, &(0x7f00000000c0)="02", 0x1, 0x4) program crashed: lost connection to test machine ignore low priority crash: lost connection to test machine testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-pwrite64 detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000180)='./sys\x00', 0xb3) mount(0x0, &(0x7f0000000000)='./sys\x00', 0x0, 0x0, 0x0) r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./sys/bus/pci/devices/0000:00:03.0/config\x00', 0x2, 0x0) pwrite64(r0, &(0x7f00000000c0)="02", 0x1, 0x4) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-pwrite64 detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000180)='./sys\x00', 0xb3) mount(0x0, &(0x7f0000000000)='./sys\x00', &(0x7f0000000040)='sysfs\x00', 0x0, 0x0) r0 = openat(0xffffffffffffff9c, 0x0, 0x2, 0x0) pwrite64(r0, &(0x7f00000000c0)="02", 0x1, 0x4) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-pwrite64 detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000180)='./sys\x00', 0xb3) mount(0x0, &(0x7f0000000000)='./sys\x00', &(0x7f0000000040)='sysfs\x00', 0x0, 0x0) r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./sys/bus/pci/devices/0000:00:03.0/config\x00', 0x2, 0x0) pwrite64(r0, 0x0, 0x0, 0x4) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-pwrite64 detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000180)='./sys\x00', 0xb3) mount(0x0, &(0x7f0000000000)='./sys\x00', &(0x7f0000000040)='sysfs\x00', 0x0, 0x0) r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./sys/bus/pci/devices/0000:00:03.0/config\x00', 0x2, 0x0) pwrite64(r0, &(0x7f00000000c0), 0x0, 0x4) program did not crash extracting C reproducer testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-pwrite64 program crashed: INFO: task hung in do_get_write_access a never seen crash title: INFO: task hung in do_get_write_access, ignore simplifying guilty program options testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-pwrite64 detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000180)='./sys\x00', 0xb3) mount(0x0, &(0x7f0000000000)='./sys\x00', &(0x7f0000000040)='sysfs\x00', 0x0, 0x0) r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./sys/bus/pci/devices/0000:00:03.0/config\x00', 0x2, 0x0) pwrite64(r0, &(0x7f00000000c0)="02", 0x1, 0x4) program crashed: INFO: task hung in do_get_write_access a never seen crash title: INFO: task hung in do_get_write_access, ignore testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-pwrite64 detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000180)='./sys\x00', 0xb3) mount(0x0, &(0x7f0000000000)='./sys\x00', &(0x7f0000000040)='sysfs\x00', 0x0, 0x0) r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./sys/bus/pci/devices/0000:00:03.0/config\x00', 0x2, 0x0) pwrite64(r0, &(0x7f00000000c0)="02", 0x1, 0x4) program crashed: INFO: task hung in do_get_write_access a never seen crash title: INFO: task hung in do_get_write_access, ignore testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-pwrite64 detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000180)='./sys\x00', 0xb3) mount(0x0, &(0x7f0000000000)='./sys\x00', &(0x7f0000000040)='sysfs\x00', 0x0, 0x0) r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./sys/bus/pci/devices/0000:00:03.0/config\x00', 0x2, 0x0) pwrite64(r0, &(0x7f00000000c0)="02", 0x1, 0x4) program crashed: INFO: task hung in do_get_write_access validation run: crashed=true testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-pwrite64 detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000180)='./sys\x00', 0xb3) mount(0x0, &(0x7f0000000000)='./sys\x00', &(0x7f0000000040)='sysfs\x00', 0x0, 0x0) r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./sys/bus/pci/devices/0000:00:03.0/config\x00', 0x2, 0x0) pwrite64(r0, &(0x7f00000000c0)="02", 0x1, 0x4) program crashed: INFO: task hung in do_get_write_access validation run: crashed=true testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-pwrite64 detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000180)='./sys\x00', 0xb3) mount(0x0, &(0x7f0000000000)='./sys\x00', &(0x7f0000000040)='sysfs\x00', 0x0, 0x0) r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./sys/bus/pci/devices/0000:00:03.0/config\x00', 0x2, 0x0) pwrite64(r0, &(0x7f00000000c0)="02", 0x1, 0x4) program crashed: INFO: task hung in corrupted validation run: crashed=true reproducing took 1h31m43.718108576s repro crashed as (corrupted=true): INFO: task syz-executor:5741 blocked in I/O wait for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:21504 pid:5741 tgid:5741 ppid:5738 task_flags:0x440140 flags:0x00080000 Call Trace: context_switch kernel/sched/core.c:5533 [inline] __schedule+0x16d9/0x5700 kernel/sched/core.c:7284 __schedule_loop kernel/sched/core.c:7361 [inline] schedule+0x164/0x2b0 kernel/sched/core.c:7376 io_schedule+0x80/0xe0 kernel/sched/core.c:8220 bit_wait_io+0x11/0xd0 kernel/sched/wait_bit.c:258 __wait_on_bit+0xac/0x2f0 kernel/sched/wait_bit.c:52 out_of_line_wait_on_bit+0x13b/0x190 kernel/sched/wait_bit.c:67 report is corrupted, running repro again testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-pwrite64 detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000180)='./sys\x00', 0xb3) mount(0x0, &(0x7f0000000000)='./sys\x00', &(0x7f0000000040)='sysfs\x00', 0x0, 0x0) r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./sys/bus/pci/devices/0000:00:03.0/config\x00', 0x2, 0x0) pwrite64(r0, &(0x7f00000000c0)="02", 0x1, 0x4) program crashed: INFO: task hung in do_get_write_access final repro crashed as (corrupted=false): INFO: task syz.4.85:6161 blocked in I/O wait for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.4.85 state:D stack:27784 pid:6161 tgid:6161 ppid:5763 task_flags:0x440040 flags:0x00080002 Call Trace: context_switch kernel/sched/core.c:5533 [inline] __schedule+0x16d9/0x5700 kernel/sched/core.c:7284 __schedule_loop kernel/sched/core.c:7361 [inline] schedule+0x164/0x2b0 kernel/sched/core.c:7376 io_schedule+0x80/0xe0 kernel/sched/core.c:8220 bit_wait_io+0x11/0xd0 kernel/sched/wait_bit.c:258 __wait_on_bit+0xac/0x2f0 kernel/sched/wait_bit.c:52 out_of_line_wait_on_bit+0x13b/0x190 kernel/sched/wait_bit.c:67 wait_on_bit_io include/linux/wait_bit.h:106 [inline] do_get_write_access+0x671/0x1090 fs/jbd2/transaction.c:1113 jbd2_journal_get_write_access+0x1d7/0x230 fs/jbd2/transaction.c:1263 __ext4_journal_get_write_access+0xf1/0x620 fs/ext4/ext4_jbd2.c:249 ext4_reserve_inode_write+0x294/0x360 fs/ext4/inode.c:6514 __ext4_mark_inode_dirty+0x146/0x7b0 fs/ext4/inode.c:6699 ext4_dirty_inode+0xd0/0x110 fs/ext4/inode.c:6736 __mark_inode_dirty+0x3a8/0x13b0 fs/fs-writeback.c:2744 generic_update_time fs/inode.c:2252 [inline] file_update_time_flags+0x39f/0x450 fs/inode.c:2482 ext4_page_mkwrite+0x225/0x1150 fs/ext4/inode.c:6902 do_page_mkwrite+0x14a/0x310 mm/memory.c:3816 do_shared_fault mm/memory.c:6076 [inline] do_fault mm/memory.c:6138 [inline] do_pte_missing+0x734/0x28f0 mm/memory.c:4700 handle_pte_fault mm/memory.c:6558 [inline] __handle_mm_fault mm/memory.c:6707 [inline] handle_mm_fault+0xf64/0x28c0 mm/memory.c:6876 do_user_addr_fault+0xa4f/0x1340 arch/x86/mm/fault.c:1343 handle_page_fault arch/x86/mm/fault.c:1483 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1536 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595 RIP: 0033:0x7f0cb4bdbb23 RSP: 002b:00007fffb500ecd0 EFLAGS: 00010246 RAX: 000000000003fde8 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000001b34a24000 RSI: 0000000000040000 RDI: 00007f0cb4f52708 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 00007fffb500ef60 INFO: task syz.1.86:6162 blocked in I/O wait for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.1.86 state:D stack:26328 pid:6162 tgid:6162 ppid:5752 task_flags:0x440040 flags:0x00080002 Call Trace: context_switch kernel/sched/core.c:5533 [inline] __schedule+0x16d9/0x5700 kernel/sched/core.c:7284 __schedule_loop kernel/sched/core.c:7361 [inline] schedule+0x164/0x2b0 kernel/sched/core.c:7376 io_schedule+0x80/0xe0 kernel/sched/core.c:8220 bit_wait_io+0x11/0xd0 kernel/sched/wait_bit.c:258 __wait_on_bit+0xac/0x2f0 kernel/sched/wait_bit.c:52 out_of_line_wait_on_bit+0x13b/0x190 kernel/sched/wait_bit.c:67 wait_on_bit_io include/linux/wait_bit.h:106 [inline] do_get_write_access+0x671/0x1090 fs/jbd2/transaction.c:1113 jbd2_journal_get_write_access+0x1d7/0x230 fs/jbd2/transaction.c:1263 __ext4_journal_get_write_access+0xf1/0x620 fs/ext4/ext4_jbd2.c:249 ext4_reserve_inode_write+0x294/0x360 fs/ext4/inode.c:6514 __ext4_mark_inode_dirty+0x146/0x7b0 fs/ext4/inode.c:6699 ext4_dirty_inode+0xd0/0x110 fs/ext4/inode.c:6736 __mark_inode_dirty+0x3a8/0x13b0 fs/fs-writeback.c:2744 generic_update_time fs/inode.c:2252 [inline] file_update_time_flags+0x39f/0x450 fs/inode.c:2482 ext4_pag ext4_page_mkwrite+0x225/0x1150 fs/ext4/inode.c:6902 do_page_mkwrite+0x14a/0x310 mm/memory.c:3816 do_shared_fault mm/memory.c:6076 [inline] do_fault mm/memory.c:6138 [inline] do_pte_missing+0x734/0x28f0 mm/memory.c:4700 handle_pte_fault mm/memory.c:6558 [inline] __handle_mm_fault mm/memory.c:6707 [inline] handle_mm_fault+0xf64/0x28c0 mm/memory.c:6876 do_user_addr_fault+0xa4f/0x1340 arch/x86/mm/fault.c:1343 handle_page_fault arch/x86/mm/fault.c:1483 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1536 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595 RIP: 0033:0x7f1ff893bb23 RSP: 002b:00007ffc4aa14a30 EFLAGS: 00010246 RAX: 000000000003fde8 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000001b34024000 RSI: 0000000000040000 RDI: 00007f1ff8cb2708 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 00007ffc4aa14cc0 INFO: task syz.0.87:6163 blocked in I/O wait for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.87 state:D stack:27440 pid:6163 tgid:6163 ppid:5747 task_flags:0x440040 flags:0x00080002 Call Trace: context_switch kernel/sched/core.c:5533 [inline] __schedule+0x16d9/0x5700 kernel/sched/core.c:7284 __schedule_loop kernel/sched/core.c:7361 [inline] schedule+0x164/0x2b0 kernel/sched/core.c:7376 io_schedule+0x80/0xe0 kernel/sched/core.c:8220 bit_wait_io+0x11/0xd0 kernel/sched/wait_bit.c:258 __wait_on_bit+0xac/0x2f0 kernel/sched/wait_bit.c:52 out_of_line_wait_on_bit+0x13b/0x190 kernel/sched/wait_bit.c:67 wait_on_bit_io include/linux/wait_bit.h:106 [inline] do_get_write_access+0x671/0x1090 fs/jbd2/transaction.c:1113 jbd2_journal_get_write_access+0x1d7/0x230 fs/jbd2/transaction.c:1263 __ext4_journal_get_write_access+0xf1/0x620 fs/ext4/ext4_jbd2.c:249 ext4_reserve_inode_write+0x294/0x360 fs/ext4/inode.c:6514 __ext4_mark_inode_dirty+0x146/0x7b0 fs/ext4/inode.c:6699 ext4_dirty_inode+0xd0/0x110 fs/ext4/inode.c:6736 __mark_inode_dirty+0x3a8/0x13b0 fs/fs-writeback.c:2744 generic_update_time fs/inode.c:2252 [inline] file_update_time_flags+0x39f/0x450 fs/inode.c:2482 ext4_page_mkwrite+0x225/0x1150 fs/ext4/inode.c:6902 do_page_mkwrite+0x14a/0x310 mm/memory.c:3816 do_shared_fault mm/memory.c:6076 [inline] do_fault mm/memory.c:6138 [inline] do_pte_missing+0x734/0x28f0 mm/memory.c:4700 handle_pte_fault mm/memory.c:6558 [inline] __handle_mm_fault mm/memory.c:6707 [inline] handle_mm_fault+0xf64/0x28c0 mm/memory.c:6876 do_user_addr_fault+0xa4f/0x1340 arch/x86/mm/fault.c:1343 handle_page_fault arch/x86/mm/fault.c:1483 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1536 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595 RIP: 0033:0x7f5be1d2bb23 RSP: 002b:00007fff01979490 EFLAGS: 00010246 RAX: 000000000003fde8 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000001b33e24000 RSI: 0000000000040000 RDI: 00007f5be20a2708 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 00007fff01979720 INFO: task syz.3.89:6164 blocked in I/O wait for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.3.89 state:D stack:27120 pid:6164 tgid:6164 ppid:5762 task_flags:0x440040 flags:0x00080002 Call Trace: context_switch kernel/sched/core.c:5533 [inline] __schedule+0x16d9/0x5700 kernel/sched/core.c:7284 __schedule_loop kernel/sched/core.c:7361 [inline] schedule+0x164/0x2b0 kernel/sched/core.c:7376 io_schedule+0x80/0xe0 kernel/sched/core.c:8220 bit_wait_io+0x11/0xd0 kernel/sched/wait_bit.c:258 __wait_on_bit+0xac/0x2f0 kernel/sched/wait_bit.c:52 out_of_line_wait_on_bit+0x13b/0x190 kernel/sched/wait_bit.c:67 wait_on_bit_io include/linux/wait_bit.h:106 [inline] do_get_write_access+0x671/0x1090 fs/jbd2/transaction.c:1113 jbd2_journal_get_write_access+0x1d7/0x230 fs/jbd2/transaction.c:1263 __ext4_journal_get_write_access+0xf1/0x620 fs/ext4/ext4_jbd2.c:249 ext4_reserve_inode_write+0x294/0x360 fs/ext4/inode.c:6514 __ext4_mark_inode_dirty+0x146/0x7b0 fs/ext4/inode.c:6699 ext4_dirty_inode+0xd0/0x110 fs/ext4/inode.c:6736 __mark_inode_dirty+0x3a8/0x13b0 fs/fs-writeback.c:2744 generic_update_time fs/inode.c:2252 [inline] file_update_time_flags+0x39f/0x450 fs/inode.c:2482 ext4_page_mkwrite+0x225/0x1150 fs/ext4/inode.c:6902 do_page_mkwrite+0x14a/0x310 mm/memory.c:3816 do_shared_fault mm/memory.c:6076 [inline] do_fault mm/memory.c:6138 [inline] do_pte_missing+0x734/0x28f0 mm/memory.c:4700 handle_pte_fault mm/memory.c:6558 [inline] __handle_mm_fault mm/memory.c:6707 [inline] handle_mm_fault+0xf64/0x28c0 mm/memory.c:6876 do_user_addr_fault+0xa4f/0x1340 arch/x86/mm/fault.c:1343 handle_page_fault arch/x86/mm/fault.c:1483 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1536 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595 RIP: 0033:0x7f4f108bbb23 RSP: 002b:00007ffc13bddd00 EFLAGS: 00010246 RAX: 000000000003fde8 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000001b34324000 RSI: 0000000000040000 RDI: 00007f4f10c32708 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 00007ffc13bddf90 INFO: task syz.2.88:6165 blocked in I/O wait for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.2.88 state:D stack:27088 pid:6165 tgid:6165 ppid:5753 task_flags:0x440040 flags:0x00080002 Call Trace: context_switch kernel/sched/core.c:5533 [inline] __schedule+0x16d9/0x5700 kernel/sched/core.c:7284 __schedule_loop kernel/sched/core.c:7361 [inline] schedule+0x164/0x2b0 kernel/sched/core.c:7376 io_schedule+0x80/0xe0 kernel/sched/core.c:8220 bit_wait_io+0x11/0xd0 kernel/sched/wait_bit.c:258 __wait_on_bit+0xac/0x2f0 kernel/sched/wait_bit.c:52 out_of_line_wait_on_bit+0x13b/0x190 kernel/sched/wait_bit.c:67 wait_on_bit_io include/linux/wait_bit.h:106 [inline] do_get_write_access+0x671/0x1090 fs/jbd2/transaction.c:1113 jbd2_journal_get_write_access+0x1d7/0x230 fs/jbd2/transaction.c:1263 __ext4_journal_get_write_access+0xf1/0x620 fs/ext4/ext4_jbd2.c:249 ext4_reserve_inode_write+0x294/0x360 fs/ext4/inode.c:6514 __ext4_mark_inode_dirty+0x146/0x7b0 fs/ext4/inode.c:6699 ext4_dirty_inode+0xd0/0x110 fs/ext4/inode.c:6736 __mark_inode_dirty+0x3a8/0x13b0 fs/fs-writeback.c:2744 generic_update_time fs/inode.c:2252 [inline] file_update_time_flags+0x39f/0x450 fs/inode.c:2482 ext4_page_mkwrite+0x225/0x1150 fs/ext4/inode.c:6902 do_page_mkwrite+0x14a/0x310 mm/memory.c:3816 do_shared_fault mm/memory.c:6076 [inline] do_fault mm/memory.c:6138 [inline] do_pte_missing+0x734/0x28f0 mm/memory.c:4700 handle_pte_fault mm/memory.c:6558 [inline] __handle_mm_fault mm/memory.c:6707 [inline] handle_mm_fault+0xf64/0x28c0 mm/memory.c:6876 do_user_addr_fault+0xa4f/0x1340 arch/x86/mm/fault.c:1343 handle_page_fault arch/x86/mm/fault.c:1483 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1536 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595 RIP: 0033:0x7f6e8957bb23 RSP: 002b:00007ffd1d583060 EFLAGS: 00010246 RAX: 000000000003fde8 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000001b34124000 RSI: 0000000000040000 RDI: 00007f6e898f2708 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 00007ffd1d5832f0 Showing all locks held in the system: locks held by pr/ttyS0/17: 3, last CPU#0: #0: ffffffff8f09d818 (console_srcu){....}-{0:0}, at: rcu_try_lock_acquire include/linux/rcupdate.h:314 [inline] #0: ffffffff8f09d818 (console_srcu){....}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:439 [inline] #0: ffffffff8f09d818 (console_srcu){....}-{0:0}, at: console_srcu_read_lock+0x30/0x60 kernel/printk/printk.c:291 #1: ffffffff9aeb1f58 (&port_lock_key){+.+.}-{3:3}, at: nbcon_emit_one kernel/printk/nbcon.c:1137 [inline] #1: ffffffff9aeb1f58 (&port_lock_key){+.+.}-{3:3}, at: nbcon_kthread_func+0x64c/0x880 kernel/printk/nbcon.c:1271 #2: ffffffff8f1c3d00 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline] #2: ffffffff8f1c3d00 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #2: ffffffff8f1c3d00 (rcu_read_lock){....}-{1:3}, at: __rt_spin_lock kernel/locking/spinlock_rt.c:50 [inline] #2: ffffffff8f1c3d00 (rcu_read_lock){....}-{1:3}, at: rt_spin_lock+0x1e2/0x400 kernel/locking/spinlock_rt.c:57 locks held by khungtaskd/39: 1, last CPU#0: #0: ffffffff8f1c3d00 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline] #0: ffffffff8f1c3d00 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffffffff8f1c3d00 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6871 locks held by kworker/u8:12/1445: 2, last CPU#1: #0: ffff8880344cc938 ((wq_completion)bat_events){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline] #0: ffff8880344cc938 ((wq_completion)bat_events){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffff8880344cc938 ((wq_completion)bat_events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3361 [inline] #0: ffff8880344cc938 ((wq_completion)bat_events){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 kernel/workqueue.c:3479 #1: ffffc90006f3fc40 ((work_completion)(&(&bat_priv->tt.work)->work)){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline] #1: ffffc90006f3fc40 ((work_completion)(&(&bat_priv->tt.work)->work)){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #1: ffffc90006f3fc40 ((work_completion)(&(&bat_priv->tt.work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3361 [inline] #1: ffffc90006f3fc40 ((work_completion)(&(&bat_priv->tt.work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 kernel/workqueue.c:3479 locks held by klogd/4939: 2, last CPU#1: #0: ffffffff8f311970 (remove_cache_srcu){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:198 [inline] #0: ffffffff8f311970 (remove_cache_srcu){.+.+}-{0:0}, at: srcu_read_lock+0x27/0x60 include/linux/srcu.h:305 #1: ffff8880b8543418 (&pcp->lock){+.+.}-{3:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline] #1: ffff8880b8543418 (&pcp->lock){+.+.}-{3:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #1: ffff8880b8543418 (&pcp->lock){+.+.}-{3:3}, at: __update_page_owner_free_handle+0x2e/0x4a0 mm/page_owner.c:301 locks held by getty/5337: 2, on CPU#1: #0: ffff888037c340a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc900044eb2e0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x460/0x1360 drivers/tty/n_tty.c:2211 locks held by syz-executor/5617: 3, on CPU#1: #0: ffff888040207948 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x1d1/0x500 mm/mmap_lock.c:310 #1: ffff88803832c688 (sb_pagefaults){.+.+}-{0:0}, at: percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline] #1: ffff88803832c688 (sb_pagefaults){.+.+}-{0:0}, at: __sb_start_write include/linux/fs/super.h:19 [inline] #1: ffff88803832c688 (sb_pagefaults){.+.+}-{0:0}, at: sb_start_pagefault include/linux/fs/super.h:159 [inline] #1: ffff88803832c688 (sb_pagefaults){.+.+}-{0:0}, at: ext4_page_mkwrite+0x203/0x1150 fs/ext4/inode.c:6901 #2: ffff888038300bb0 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fbf/0x2200 fs/jbd2/transaction.c:444 locks held by syz.4.85/6161: 3, on CPU#0: #0: ffff88801dbda948 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x1d1/0x500 mm/mmap_lock.c:310 #1: ffff88803832c688 (sb_pagefaults){.+.+}-{0:0}, at: percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline] #1: ffff88803832c688 (sb_pagefaults){.+.+}-{0:0}, at: __sb_start_write include/linux/fs/super.h:19 [inline] #1: ffff88803832c688 (sb_pagefaults){.+.+}-{0:0}, at: sb_start_pagefault include/linux/fs/super.h:159 [inline] #1: ffff88803832c688 (sb_pagefaults){.+.+}-{0:0}, at: ext4_page_mkwrite+0x203/0x1150 fs/ext4/inode.c:6901 #2: ffff888038300bb0 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fbf/0x2200 fs/jbd2/transaction.c:444 locks held by syz.1.86/6162: 3, on CPU#0: #0: ffff888027fb0d08 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x1d1/0x500 mm/mmap_lock.c:310 #1: ffff88803832c688 (sb_pagefaults){.+.+}-{0:0}, at: percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline] #1: ffff88803832c688 (sb_pagefaults){.+.+}-{0:0}, at: __sb_start_write include/linux/fs/super.h:19 [inline] #1: ffff88803832c688 (sb_pagefaults){.+.+}-{0:0}, at: sb_start_pagefault include/linux/fs/super.h:159 [inline] #1: ffff88803832c688 (sb_pagefaults){.+.+}-{0:0}, at: ext4_page_mkwrite+0x203/0x1150 fs/ext4/inode.c:6901 #2: ffff888038300bb0 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fbf/0x2200 fs/jbd2/transaction.c:444 locks held by syz.0.87/6163: 3, on CPU#0: #0: ffff88803179c1c8 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x1d1/0x500 mm/mmap_lock.c:310 #1: ffff88803832c688 (sb_pagefaults){.+.+}-{0:0}, at: percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline] #1: ffff88803832c688 (sb_pagefaults){.+.+}-{0:0}, at: __sb_start_write include/linux/fs/super.h:19 [inline] #1: ffff88803832c688 (sb_pagefaults){.+.+}-{0:0}, at: sb_start_pagefault include/linux/fs/super.h:159 [inline] #1: ffff88803832c688 (sb_pagefaults){.+.+}-{0:0}, at: ext4_page_mkwrite+0x203/0x1150 fs/ext4/inode.c:6901 #2: ffff888038300bb0 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fbf/0x2200 fs/jbd2/transaction.c:444 locks held by syz.3.89/6164: 3, on CPU#0: #0: ffff88802d79a6c8 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x1d1/0x500 mm/mmap_lock.c:310 #1: ffff88803832c688 (sb_pagefaults){.+.+}-{0:0}, at: percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline] #1: ffff88803832c688 (sb_pagefaults){.+.+}-{0:0}, at: __sb_start_write include/linux/fs/super.h:19 [inline] #1: ffff88803832c688 (sb_pagefaults){.+.+}-{0:0}, at: sb_start_pagefault include/linux/fs/super.h:159 [inline] #1: ffff88803832c688 (sb_pagefaults){.+.+}-{0:0}, at: ext4_page_mkwrite+0x203/0x1150 fs/ext4/inode.c:6901 #2: ffff888038300bb0 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fbf/0x2200 fs/jbd2/transaction.c:444 locks held by syz.2.88/6165: 3, on CPU#1: #0: ffff888027ab4588 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x1d1/0x500 mm/mmap_lock.c:310 #1: ffff88803832c688 (sb_pagefaults){.+.+}-{0:0}, at: percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline] #1: ffff88803832c688 (sb_pagefaults){.+.+}-{0:0}, at: __sb_start_write include/linux/fs/super.h:19 [inline] #1: ffff88803832c688 (sb_pagefaults){.+.+}-{0:0}, at: sb_start_pagefault include/linux/fs/super.h:159 [inline] #1: ffff88803832c688 (sb_pagefaults){.+.+}-{0:0}, at: ext4_page_mkwrite+0x203/0x1150 fs/ext4/inode.c:6901 #2: ffff888038300bb0 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fbf/0x2200 fs/jbd2/transaction.c:444 ============================================= NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 39 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:123 nmi_trigger_cpumask_backtrace+0x17d/0x390 lib/nmi_backtrace.c:66 trigger_all_cpu_backtrace include/linux/nmi.h:164 [inline] __sys_info lib/sys_info.c:157 [inline] sys_info+0x135/0x170 lib/sys_info.c:165 check_hung_uninterruptible_tasks kernel/hung_task.c:353 [inline] watchdog+0xfd7/0x1030 kernel/hung_task.c:561 kthread+0x38b/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 13 Comm: kworker/u8:1 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026 Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet RIP: 0010:__bfs kernel/locking/lockdep.c:1859 [inline] RIP: 0010:__bfs_backwards kernel/locking/lockdep.c:1904 [inline] RIP: 0010:check_irq_usage kernel/locking/lockdep.c:2840 [inline] RIP: 0010:check_prev_add kernel/locking/lockdep.c:3213 [inline] RIP: 0010:check_prevs_add kernel/locking/lockdep.c:3328 [inline] RIP: 0010:validate_chain kernel/locking/lockdep.c:3952 [inline] RIP: 0010:__lock_acquire+0x1a2e/0x2de0 kernel/locking/lockdep.c:5288 Code: 15 25 ff 0f 00 00 39 05 0c e0 09 13 73 06 89 05 04 e0 09 13 49 8b 06 48 89 df 4c 39 e8 0f 84 39 fe ff ff 4c 89 78 30 48 8b 00 <4c> 39 e8 75 f4 48 89 df e9 25 fe ff ff 48 89 fb 48 c7 c7 d0 0f 09 RSP: 0018:ffffc900001270b8 EFLAGS: 00000002 RAX: ffffffff945546d0 RBX: 00000000000003cd RCX: 0000000000000548 RDX: 0000000000000008 RSI: ffff88801dac6a78 RDI: 00000000000003cd RBP: 09ce9e81f3c04be7 R08: ffffc90000127080 R09: 0000000000000020 R10: dffffc0000000000 R11: ffffffff81a27d30 R12: 0000000000000547 R13: ffffffff945546d0 R14: ffffffff9748d948 R15: ffffffff9748d9b8 FS: 0000000000000000(0000) GS:ffff888124abb000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055f0b5928660 CR3: 0000000038dc4000 CR4: 00000000003526f0 Call Trace: lock_acquire+0x115/0x350 kernel/locking/lockdep.c:5942 do_write_seqcount_begin_nested include/linux/seqlock.h:478 [inline] do_write_seqcount_begin include/linux/seqlock.h:504 [inline] psi_write_begin+0xa9/0x160 kernel/sched/psi.c:183 psi_task_switch+0x57/0x790 kernel/sched/psi.c:933 psi_sched_switch kernel/sched/stats.h:218 [inline] __schedule+0x2912/0x5700 kernel/sched/core.c:7278 preempt_schedule_irq+0x4b/0x90 kernel/sched/core.c:7606 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline] irqentry_exit+0x14f/0x920 kernel/entry/common.c:167 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:lock_acquire+0x232/0x350 kernel/locking/lockdep.c:5947 Code: ff ff ff e8 a0 68 b8 09 f7 44 24 10 00 02 00 00 0f 84 38 ff ff ff 65 48 8b 05 e2 42 04 12 48 3b 44 24 50 75 33 fb 48 83 c4 58 <5b> 41 5c 41 5d 41 5e 41 5f 5d e9 ff 3c bc 09 cc 48 8d 3d d7 34 13 RSP: 0018:ffffc90000127650 EFLAGS: 00000296 RAX: 4a1b0100771f6500 RBX: 0000000000000001 RCX: 0000000000000046 RDX: 000000003507c169 RSI: ffffffff8db32a2e RDI: ffffffff8bcc6980 RBP: ffff88801dac5dc0 R08: ffffffff8188f34d R09: 0000000000000000 R10: dffffc0000000000 R11: ffffed100842d95d R12: ffffffff8f059580 R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000000246 __local_bh_disable_ip+0x5c/0x420 kernel/softirq.c:186 local_bh_disable include/linux/bottom_half.h:20 [inline] rcu_read_lock_bh include/linux/rcupdate.h:902 [inline] __dev_queue_xmit+0x2ad/0x3a70 net/core/dev.c:4872 dev_queue_xmit include/linux/netdevice.h:3464 [inline] batadv_send_skb_packet+0x3ff/0x650 net/batman-adv/send.c:100 batadv_iv_ogm_send_to_if net/batman-adv/bat_iv_ogm.c:466 [inline] batadv_iv_ogm_emit net/batman-adv/bat_iv_ogm.c:491 [inline] batadv_iv_send_outstanding_bat_ogm_packet+0x590/0x740 net/batman-adv/bat_iv_ogm.c:1912 process_one_work kernel/workqueue.c:3396 [inline] process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3479 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560 kthread+0x38b/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245