Extracting prog: 3m30.716641305s
Minimizing prog: 1h0m50.881268388s
Simplifying prog options: 11m47.700529046s
Extracting C: 2m58.135066387s
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:4 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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getrandom-mkdir-mount-openat-mmap
detailed listing:
executing program 0:
getrandom(&(0x7f0000000580)=""/265, 0xffffff3f, 0x3)
mkdir(&(0x7f0000000000)='my_sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000200)='my_sys\x00', &(0x7f0000000300)='sysfs\x00', 0x400, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000500)='my_sys/bus/pci/devices/0000:00:03.0/resource1\x00', 0x2, 0x0)
mmap(&(0x7f0000800000)=nil, 0x1000, 0x3, 0x11, r0, 0x0)

program crashed: INFO: task hung in jbd2_journal_commit_transaction
single: successfully extracted reproducer
found reproducer with 5 syscalls
minimizing guilty program
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getrandom-mkdir-mount-openat
detailed listing:
executing program 0:
getrandom(&(0x7f0000000580)=""/265, 0xffffff3f, 0x3)
mkdir(&(0x7f0000000000)='my_sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000200)='my_sys\x00', &(0x7f0000000300)='sysfs\x00', 0x400, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000500)='my_sys/bus/pci/devices/0000:00:03.0/resource1\x00', 0x2, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getrandom-mkdir-mount-mmap
detailed listing:
executing program 0:
getrandom(&(0x7f0000000580)=""/265, 0xffffff3f, 0x3)
mkdir(&(0x7f0000000000)='my_sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000200)='my_sys\x00', &(0x7f0000000300)='sysfs\x00', 0x400, 0x0)
mmap(&(0x7f0000800000)=nil, 0x1000, 0x3, 0x11, 0xffffffffffffffff, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getrandom-mkdir-openat-mmap
detailed listing:
executing program 0:
getrandom(&(0x7f0000000580)=""/265, 0xffffff3f, 0x3)
mkdir(&(0x7f0000000000)='my_sys\x00', 0x1ff)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000500)='my_sys/bus/pci/devices/0000:00:03.0/resource1\x00', 0x2, 0x0)
mmap(&(0x7f0000800000)=nil, 0x1000, 0x3, 0x11, r0, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getrandom-mount-openat-mmap
detailed listing:
executing program 0:
getrandom(&(0x7f0000000580)=""/265, 0xffffff3f, 0x3)
mount(0x0, &(0x7f0000000200)='my_sys\x00', &(0x7f0000000300)='sysfs\x00', 0x400, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000500)='my_sys/bus/pci/devices/0000:00:03.0/resource1\x00', 0x2, 0x0)
mmap(&(0x7f0000800000)=nil, 0x1000, 0x3, 0x11, r0, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mount-openat-mmap
detailed listing:
executing program 0:
mkdir(&(0x7f0000000000)='my_sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000200)='my_sys\x00', &(0x7f0000000300)='sysfs\x00', 0x400, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000500)='my_sys/bus/pci/devices/0000:00:03.0/resource1\x00', 0x2, 0x0)
mmap(&(0x7f0000800000)=nil, 0x1000, 0x3, 0x11, r0, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getrandom-mkdir-mount-openat-mmap
detailed listing:
executing program 0:
getrandom(0x0, 0x0, 0x3)
mkdir(&(0x7f0000000000)='my_sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000200)='my_sys\x00', &(0x7f0000000300)='sysfs\x00', 0x400, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000500)='my_sys/bus/pci/devices/0000:00:03.0/resource1\x00', 0x2, 0x0)
mmap(&(0x7f0000800000)=nil, 0x1000, 0x3, 0x11, r0, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getrandom-mkdir-mount-openat-mmap
detailed listing:
executing program 0:
getrandom(&(0x7f0000000580)=""/265, 0xffffff3f, 0x3)
mkdir(0x0, 0x1ff)
mount(0x0, &(0x7f0000000200)='my_sys\x00', &(0x7f0000000300)='sysfs\x00', 0x400, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000500)='my_sys/bus/pci/devices/0000:00:03.0/resource1\x00', 0x2, 0x0)
mmap(&(0x7f0000800000)=nil, 0x1000, 0x3, 0x11, r0, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getrandom-mkdir-mount-openat-mmap
detailed listing:
executing program 0:
getrandom(&(0x7f0000000580)=""/265, 0xffffff3f, 0x3)
mkdir(&(0x7f0000000000)='my_sys\x00', 0x1ff)
mount(0x0, 0x0, &(0x7f0000000300)='sysfs\x00', 0x400, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000500)='my_sys/bus/pci/devices/0000:00:03.0/resource1\x00', 0x2, 0x0)
mmap(&(0x7f0000800000)=nil, 0x1000, 0x3, 0x11, r0, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getrandom-mkdir-mount-openat-mmap
detailed listing:
executing program 0:
getrandom(&(0x7f0000000580)=""/265, 0xffffff3f, 0x3)
mkdir(&(0x7f0000000000)='my_sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000200)='my_sys\x00', 0x0, 0x400, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000500)='my_sys/bus/pci/devices/0000:00:03.0/resource1\x00', 0x2, 0x0)
mmap(&(0x7f0000800000)=nil, 0x1000, 0x3, 0x11, r0, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getrandom-mkdir-mount-openat-mmap
detailed listing:
executing program 0:
getrandom(&(0x7f0000000580)=""/265, 0xffffff3f, 0x3)
mkdir(&(0x7f0000000000)='my_sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000200)='my_sys\x00', &(0x7f0000000300)='sysfs\x00', 0x400, 0x0)
r0 = openat(0xffffffffffffff9c, 0x0, 0x2, 0x0)
mmap(&(0x7f0000800000)=nil, 0x1000, 0x3, 0x11, r0, 0x0)

program crashed: lost connection to test machine
suppressed program crash: lost connection to test machine
extracting C reproducer
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getrandom-mkdir-mount-openat-mmap
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
simplifying guilty program options
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getrandom-mkdir-mount-openat-mmap
detailed listing:
executing program 0:
getrandom(&(0x7f0000000580)=""/265, 0xffffff3f, 0x3)
mkdir(&(0x7f0000000000)='my_sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000200)='my_sys\x00', &(0x7f0000000300)='sysfs\x00', 0x400, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000500)='my_sys/bus/pci/devices/0000:00:03.0/resource1\x00', 0x2, 0x0)
mmap(&(0x7f0000800000)=nil, 0x1000, 0x3, 0x11, r0, 0x0)

program did not crash
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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getrandom-mkdir-mount-openat-mmap
detailed listing:
executing program 0:
getrandom(&(0x7f0000000580)=""/265, 0xffffff3f, 0x3)
mkdir(&(0x7f0000000000)='my_sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000200)='my_sys\x00', &(0x7f0000000300)='sysfs\x00', 0x400, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000500)='my_sys/bus/pci/devices/0000:00:03.0/resource1\x00', 0x2, 0x0)
mmap(&(0x7f0000800000)=nil, 0x1000, 0x3, 0x11, r0, 0x0)

program crashed: INFO: task hung in jbd2_journal_commit_transaction
extracting C reproducer
testing compiled C 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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getrandom-mkdir-mount-openat-mmap
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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getrandom-mkdir-mount-openat-mmap
detailed listing:
executing program 0:
getrandom(&(0x7f0000000580)=""/265, 0xffffff3f, 0x3)
mkdir(&(0x7f0000000000)='my_sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000200)='my_sys\x00', &(0x7f0000000300)='sysfs\x00', 0x400, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000500)='my_sys/bus/pci/devices/0000:00:03.0/resource1\x00', 0x2, 0x0)
mmap(&(0x7f0000800000)=nil, 0x1000, 0x3, 0x11, r0, 0x0)

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: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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getrandom-mkdir-mount-openat-mmap
detailed listing:
executing program 0:
getrandom(&(0x7f0000000580)=""/265, 0xffffff3f, 0x3)
mkdir(&(0x7f0000000000)='my_sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000200)='my_sys\x00', &(0x7f0000000300)='sysfs\x00', 0x400, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000500)='my_sys/bus/pci/devices/0000:00:03.0/resource1\x00', 0x2, 0x0)
mmap(&(0x7f0000800000)=nil, 0x1000, 0x3, 0x11, r0, 0x0)

program crashed: INFO: task hung in jbd2_journal_commit_transaction
validation run: crashed=true
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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getrandom-mkdir-mount-openat-mmap
detailed listing:
executing program 0:
getrandom(&(0x7f0000000580)=""/265, 0xffffff3f, 0x3)
mkdir(&(0x7f0000000000)='my_sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000200)='my_sys\x00', &(0x7f0000000300)='sysfs\x00', 0x400, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000500)='my_sys/bus/pci/devices/0000:00:03.0/resource1\x00', 0x2, 0x0)
mmap(&(0x7f0000800000)=nil, 0x1000, 0x3, 0x11, r0, 0x0)

program crashed: INFO: task hung in jbd2_journal_commit_transaction
validation run: crashed=true
reproducing took 1h29m36.383340907s
repro crashed as (corrupted=false):
INFO: task jbd2/sda1-8:73 blocked for more than 122 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:jbd2/sda1-8     state:D stack:0     pid:73    tgid:73    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:6060 [inline]
 __schedule+0x1496/0x20b0 kernel/sched/core.c:7880
 __schedule_loop kernel/sched/core.c:7957 [inline]
 schedule+0xc5/0x240 kernel/sched/core.c:7972
 io_schedule+0x88/0xe0 kernel/sched/core.c:8786
 bit_wait_io+0x17/0xd0 kernel/sched/wait_bit.c:209
 __wait_on_bit+0xb3/0x2e0 kernel/sched/wait_bit.c:49
 out_of_line_wait_on_bit+0x139/0x190 kernel/sched/wait_bit.c:64
 wait_on_bit_io include/linux/wait_bit.h:101 [inline]
 __wait_on_buffer+0x5a/0x70 fs/buffer.c:123
 wait_on_buffer include/linux/buffer_head.h:422 [inline]
 jbd2_journal_commit_transaction+0x2dba/0x5510 fs/jbd2/commit.c:814
 kjournald2+0x386/0x6a0 fs/jbd2/journal.c:201
 kthread+0x2c7/0x360 kernel/kthread.c:389
 ret_from_fork+0x67/0xa0 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
INFO: task syz.2.28:416 blocked for more than 123 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.28        state:D stack:0     pid:416   tgid:416   ppid:379    flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:6060 [inline]
 __schedule+0x1496/0x20b0 kernel/sched/core.c:7880
 __schedule_loop kernel/sched/core.c:7957 [inline]
 schedule+0xc5/0x240 kernel/sched/core.c:7972
 io_schedule+0x88/0xe0 kernel/sched/core.c:8786
 bit_wait_io+0x17/0xd0 kernel/sched/wait_bit.c:209
 __wait_on_bit+0xb3/0x2e0 kernel/sched/wait_bit.c:49
 out_of_line_wait_on_bit+0x139/0x190 kernel/sched/wait_bit.c:64
 wait_on_bit_io include/linux/wait_bit.h:101 [inline]
 do_get_write_access+0x558/0xd70 fs/jbd2/transaction.c:1096
 jbd2_journal_get_write_access+0x268/0x3d0 fs/jbd2/transaction.c:1245
 __ext4_journal_get_write_access+0x1b6/0x6a0 fs/ext4/ext4_jbd2.c:239
 ext4_reserve_inode_write+0x1f6/0x2e0 fs/ext4/inode.c:5892
 __ext4_mark_inode_dirty+0xac/0x5e0 fs/ext4/inode.c:6066
 ext4_dirty_inode+0xc9/0x110 fs/ext4/inode.c:6103
 __mark_inode_dirty+0x251/0xc50 fs/fs-writeback.c:2515
 generic_update_time fs/inode.c:2056 [inline]
 inode_update_time fs/inode.c:2069 [inline]
 __file_update_time fs/inode.c:2258 [inline]
 file_update_time+0x1d3/0x210 fs/inode.c:2288
 ext4_page_mkwrite+0x2bf/0x1120 fs/ext4/inode.c:6221
 do_page_mkwrite mm/memory.c:3263 [inline]
 do_shared_fault mm/memory.c:5537 [inline]
 do_fault mm/memory.c:5599 [inline]
 do_pte_missing+0x12c1/0x4440 mm/memory.c:4069
 handle_pte_fault mm/memory.c:5940 [inline]
 __handle_mm_fault mm/memory.c:6083 [inline]
 handle_mm_fault+0x1189/0x1ba0 mm/memory.c:6251
 do_user_addr_fault+0x951/0x1230 arch/x86/mm/fault.c:1336
 handle_page_fault arch/x86/mm/fault.c:1479 [inline]
 exc_page_fault+0x58/0xc0 arch/x86/mm/fault.c:1534
 asm_exc_page_fault+0x2b/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7f75ada667d1
RSP: 002b:00007ffc85873420 EFLAGS: 00010202
RAX: 0000001b34664000 RBX: 0000000000000000 RCX: 000000000003fde8
RDX: 0000001b34663fff RSI: 0000000000000008 RDI: 00007f75ae955720
RBP: 00007f75ae955720 R08: 0000000000000000 R09: 00007f75ade26128
R10: 00007f75ae955700 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000003
 </TASK>
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 Comm: khungtaskd Not tainted syzkaller #0 91781886e4a1baa38ce9d8cd537274748dd3a26f
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
 <TASK>
 __dump_stack+0x21/0x30 lib/dump_stack.c:94
 dump_stack_lvl+0x140/0x1c0 lib/dump_stack.c:120
 dump_stack+0x19/0x20 lib/dump_stack.c:129
 nmi_cpu_backtrace+0x2ba/0x2d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x142/0x2c0 lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:41
 trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:267 [inline]
 watchdog+0xe45/0xf90 kernel/hung_task.c:423
 kthread+0x2c7/0x360 kernel/kthread.c:389
 ret_from_fork+0x67/0xa0 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted syzkaller #0 91781886e4a1baa38ce9d8cd537274748dd3a26f
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:pv_native_safe_halt+0x13/0x20 arch/x86/kernel/paravirt.c:116
Code: cc cc cc cc cc cc cc b8 d9 2a 79 0a 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 23 a9 43 00 55 48 89 e5 fb f4 <5d> c3 cc cc cc cc cc cc cc cc cc cc cc b8 00 00 00 00 90 90 90 90
RSP: 0018:ffffc900001a7e00 EFLAGS: 000002c2
RAX: ffff8881f6f00000 RBX: ffff88810366b900 RCX: ffffffff85a3b4fd
RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000025064
RBP: ffffc900001a7e00 R08: ffff8881f6f395eb R09: 1ffff1103ede72bd
R10: dffffc0000000000 R11: ffffed103ede72be R12: 0000000000000000
R13: 1ffff110206cd720 R14: dffffc0000000000 R15: ffffffff87ecb868
FS:  0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f87eb6ce2c0 CR3: 000000010cbd6000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 arch_safe_halt arch/x86/include/asm/paravirt.h:-1 [inline]
 default_idle+0x17/0x30 arch/x86/kernel/process.c:754
 arch_cpu_idle+0xd/0x20 arch/x86/kernel/process.c:791
 default_idle_call+0x3e/0x80 kernel/sched/idle.c:117
 cpuidle_idle_call kernel/sched/idle.c:193 [inline]
 do_idle+0x1df/0x570 kernel/sched/idle.c:346
 cpu_startup_entry+0x47/0x60 kernel/sched/idle.c:445
 start_secondary+0x12e/0x140 arch/x86/kernel/smpboot.c:314
 common_startup_64+0x13b/0x157
 </TASK>

final repro crashed as (corrupted=false):
INFO: task jbd2/sda1-8:73 blocked for more than 122 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:jbd2/sda1-8     state:D stack:0     pid:73    tgid:73    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:6060 [inline]
 __schedule+0x1496/0x20b0 kernel/sched/core.c:7880
 __schedule_loop kernel/sched/core.c:7957 [inline]
 schedule+0xc5/0x240 kernel/sched/core.c:7972
 io_schedule+0x88/0xe0 kernel/sched/core.c:8786
 bit_wait_io+0x17/0xd0 kernel/sched/wait_bit.c:209
 __wait_on_bit+0xb3/0x2e0 kernel/sched/wait_bit.c:49
 out_of_line_wait_on_bit+0x139/0x190 kernel/sched/wait_bit.c:64
 wait_on_bit_io include/linux/wait_bit.h:101 [inline]
 __wait_on_buffer+0x5a/0x70 fs/buffer.c:123
 wait_on_buffer include/linux/buffer_head.h:422 [inline]
 jbd2_journal_commit_transaction+0x2dba/0x5510 fs/jbd2/commit.c:814
 kjournald2+0x386/0x6a0 fs/jbd2/journal.c:201
 kthread+0x2c7/0x360 kernel/kthread.c:389
 ret_from_fork+0x67/0xa0 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
INFO: task syz.2.28:416 blocked for more than 123 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.28        state:D stack:0     pid:416   tgid:416   ppid:379    flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:6060 [inline]
 __schedule+0x1496/0x20b0 kernel/sched/core.c:7880
 __schedule_loop kernel/sched/core.c:7957 [inline]
 schedule+0xc5/0x240 kernel/sched/core.c:7972
 io_schedule+0x88/0xe0 kernel/sched/core.c:8786
 bit_wait_io+0x17/0xd0 kernel/sched/wait_bit.c:209
 __wait_on_bit+0xb3/0x2e0 kernel/sched/wait_bit.c:49
 out_of_line_wait_on_bit+0x139/0x190 kernel/sched/wait_bit.c:64
 wait_on_bit_io include/linux/wait_bit.h:101 [inline]
 do_get_write_access+0x558/0xd70 fs/jbd2/transaction.c:1096
 jbd2_journal_get_write_access+0x268/0x3d0 fs/jbd2/transaction.c:1245
 __ext4_journal_get_write_access+0x1b6/0x6a0 fs/ext4/ext4_jbd2.c:239
 ext4_reserve_inode_write+0x1f6/0x2e0 fs/ext4/inode.c:5892
 __ext4_mark_inode_dirty+0xac/0x5e0 fs/ext4/inode.c:6066
 ext4_dirty_inode+0xc9/0x110 fs/ext4/inode.c:6103
 __mark_inode_dirty+0x251/0xc50 fs/fs-writeback.c:2515
 generic_update_time fs/inode.c:2056 [inline]
 inode_update_time fs/inode.c:2069 [inline]
 __file_update_time fs/inode.c:2258 [inline]
 file_update_time+0x1d3/0x210 fs/inode.c:2288
 ext4_page_mkwrite+0x2bf/0x1120 fs/ext4/inode.c:6221
 do_page_mkwrite mm/memory.c:3263 [inline]
 do_shared_fault mm/memory.c:5537 [inline]
 do_fault mm/memory.c:5599 [inline]
 do_pte_missing+0x12c1/0x4440 mm/memory.c:4069
 handle_pte_fault mm/memory.c:5940 [inline]
 __handle_mm_fault mm/memory.c:6083 [inline]
 handle_mm_fault+0x1189/0x1ba0 mm/memory.c:6251
 do_user_addr_fault+0x951/0x1230 arch/x86/mm/fault.c:1336
 handle_page_fault arch/x86/mm/fault.c:1479 [inline]
 exc_page_fault+0x58/0xc0 arch/x86/mm/fault.c:1534
 asm_exc_page_fault+0x2b/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7f75ada667d1
RSP: 002b:00007ffc85873420 EFLAGS: 00010202
RAX: 0000001b34664000 RBX: 0000000000000000 RCX: 000000000003fde8
RDX: 0000001b34663fff RSI: 0000000000000008 RDI: 00007f75ae955720
RBP: 00007f75ae955720 R08: 0000000000000000 R09: 00007f75ade26128
R10: 00007f75ae955700 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000003
 </TASK>
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 Comm: khungtaskd Not tainted syzkaller #0 91781886e4a1baa38ce9d8cd537274748dd3a26f
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
 <TASK>
 __dump_stack+0x21/0x30 lib/dump_stack.c:94
 dump_stack_lvl+0x140/0x1c0 lib/dump_stack.c:120
 dump_stack+0x19/0x20 lib/dump_stack.c:129
 nmi_cpu_backtrace+0x2ba/0x2d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x142/0x2c0 lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:41
 trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:267 [inline]
 watchdog+0xe45/0xf90 kernel/hung_task.c:423
 kthread+0x2c7/0x360 kernel/kthread.c:389
 ret_from_fork+0x67/0xa0 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted syzkaller #0 91781886e4a1baa38ce9d8cd537274748dd3a26f
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:pv_native_safe_halt+0x13/0x20 arch/x86/kernel/paravirt.c:116
Code: cc cc cc cc cc cc cc b8 d9 2a 79 0a 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 23 a9 43 00 55 48 89 e5 fb f4 <5d> c3 cc cc cc cc cc cc cc cc cc cc cc b8 00 00 00 00 90 90 90 90
RSP: 0018:ffffc900001a7e00 EFLAGS: 000002c2
RAX: ffff8881f6f00000 RBX: ffff88810366b900 RCX: ffffffff85a3b4fd
RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000025064
RBP: ffffc900001a7e00 R08: ffff8881f6f395eb R09: 1ffff1103ede72bd
R10: dffffc0000000000 R11: ffffed103ede72be R12: 0000000000000000
R13: 1ffff110206cd720 R14: dffffc0000000000 R15: ffffffff87ecb868
FS:  0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f87eb6ce2c0 CR3: 000000010cbd6000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 arch_safe_halt arch/x86/include/asm/paravirt.h:-1 [inline]
 default_idle+0x17/0x30 arch/x86/kernel/process.c:754
 arch_cpu_idle+0xd/0x20 arch/x86/kernel/process.c:791
 default_idle_call+0x3e/0x80 kernel/sched/idle.c:117
 cpuidle_idle_call kernel/sched/idle.c:193 [inline]
 do_idle+0x1df/0x570 kernel/sched/idle.c:346
 cpu_startup_entry+0x47/0x60 kernel/sched/idle.c:445
 start_secondary+0x12e/0x140 arch/x86/kernel/smpboot.c:314
 common_startup_64+0x13b/0x157
 </TASK>