Extracting prog: 2m26.144511069s
Minimizing prog: 28m30.796010357s
Simplifying prog options: 0s
Extracting C: 1m32.788194821s
Simplifying C: 9m16.876882155s


extracting reproducer from 1 programs
testing a last program of every proc
single: executing 1 programs separately with timeout 30s
testing program (duration=30s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mkdirat-mkdir-mount$overlay-chdir-openat$cgroup_ro-mmap-lseek
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000280)='./file0\x00', 0x10)
mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./file1\x00', 0x0)
mkdir(&(0x7f0000000300)='./bus\x00', 0x0)
mount$overlay(0x0, &(0x7f00000000c0)='./bus\x00', &(0x7f0000000340), 0x0, &(0x7f0000000080)={[{@workdir={'workdir', 0x3d, './bus'}}, {@lowerdir={'lowerdir', 0x3d, './file0'}}, {@upperdir={'upperdir', 0x3d, './file1'}}]})
chdir(&(0x7f0000000140)='./bus\x00')
r0 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000040)='cgroup.freeze\x00', 0x275a, 0x0)
mmap(&(0x7f0000000000/0xb36000)=nil, 0xb36000, 0x1000003, 0x28011, r0, 0x0)
lseek(r0, 0x5, 0x1)

program crashed: WARNING in file_seek_cur_needs_f_lock
single: successfully extracted reproducer
found reproducer with 8 syscalls
minimizing guilty program
testing program (duration=1m0.645956412s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mkdirat-mkdir-mount$overlay-chdir-openat$cgroup_ro-mmap
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000280)='./file0\x00', 0x10)
mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./file1\x00', 0x0)
mkdir(&(0x7f0000000300)='./bus\x00', 0x0)
mount$overlay(0x0, &(0x7f00000000c0)='./bus\x00', &(0x7f0000000340), 0x0, &(0x7f0000000080)={[{@workdir={'workdir', 0x3d, './bus'}}, {@lowerdir={'lowerdir', 0x3d, './file0'}}, {@upperdir={'upperdir', 0x3d, './file1'}}]})
chdir(&(0x7f0000000140)='./bus\x00')
r0 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000040)='cgroup.freeze\x00', 0x275a, 0x0)
mmap(&(0x7f0000000000/0xb36000)=nil, 0xb36000, 0x1000003, 0x28011, r0, 0x0)

program did not crash
testing program (duration=1m0.645956412s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mkdirat-mkdir-mount$overlay-chdir-openat$cgroup_ro-lseek
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000280)='./file0\x00', 0x10)
mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./file1\x00', 0x0)
mkdir(&(0x7f0000000300)='./bus\x00', 0x0)
mount$overlay(0x0, &(0x7f00000000c0)='./bus\x00', &(0x7f0000000340), 0x0, &(0x7f0000000080)={[{@workdir={'workdir', 0x3d, './bus'}}, {@lowerdir={'lowerdir', 0x3d, './file0'}}, {@upperdir={'upperdir', 0x3d, './file1'}}]})
chdir(&(0x7f0000000140)='./bus\x00')
r0 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000040)='cgroup.freeze\x00', 0x275a, 0x0)
lseek(r0, 0x5, 0x1)

program did not crash
testing program (duration=1m0.645956412s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mkdirat-mkdir-mount$overlay-chdir-mmap-lseek
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000280)='./file0\x00', 0x10)
mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./file1\x00', 0x0)
mkdir(&(0x7f0000000300)='./bus\x00', 0x0)
mount$overlay(0x0, &(0x7f00000000c0)='./bus\x00', &(0x7f0000000340), 0x0, &(0x7f0000000080)={[{@workdir={'workdir', 0x3d, './bus'}}, {@lowerdir={'lowerdir', 0x3d, './file0'}}, {@upperdir={'upperdir', 0x3d, './file1'}}]})
chdir(&(0x7f0000000140)='./bus\x00')
mmap(&(0x7f0000000000/0xb36000)=nil, 0xb36000, 0x1000003, 0x28011, 0xffffffffffffffff, 0x0)
lseek(0xffffffffffffffff, 0x5, 0x1)

program did not crash
testing program (duration=1m0.645956412s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mkdirat-mkdir-mount$overlay-openat$cgroup_ro-mmap-lseek
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000280)='./file0\x00', 0x10)
mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./file1\x00', 0x0)
mkdir(&(0x7f0000000300)='./bus\x00', 0x0)
mount$overlay(0x0, &(0x7f00000000c0)='./bus\x00', &(0x7f0000000340), 0x0, &(0x7f0000000080)={[{@workdir={'workdir', 0x3d, './bus'}}, {@lowerdir={'lowerdir', 0x3d, './file0'}}, {@upperdir={'upperdir', 0x3d, './file1'}}]})
r0 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000040)='cgroup.freeze\x00', 0x275a, 0x0)
mmap(&(0x7f0000000000/0xb36000)=nil, 0xb36000, 0x1000003, 0x28011, r0, 0x0)
lseek(r0, 0x5, 0x1)

program did not crash
testing program (duration=1m0.645956412s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mkdirat-mkdir-chdir-openat$cgroup_ro-mmap-lseek
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000280)='./file0\x00', 0x10)
mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./file1\x00', 0x0)
mkdir(&(0x7f0000000300)='./bus\x00', 0x0)
chdir(&(0x7f0000000140)='./bus\x00')
r0 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000040)='cgroup.freeze\x00', 0x275a, 0x0)
mmap(&(0x7f0000000000/0xb36000)=nil, 0xb36000, 0x1000003, 0x28011, r0, 0x0)
lseek(r0, 0x5, 0x1)

program did not crash
testing program (duration=1m0.645956412s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mkdirat-mount$overlay-chdir-openat$cgroup_ro-mmap-lseek
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000280)='./file0\x00', 0x10)
mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./file1\x00', 0x0)
mount$overlay(0x0, &(0x7f00000000c0)='./bus\x00', &(0x7f0000000340), 0x0, &(0x7f0000000080)={[{@workdir={'workdir', 0x3d, './bus'}}, {@lowerdir={'lowerdir', 0x3d, './file0'}}, {@upperdir={'upperdir', 0x3d, './file1'}}]})
chdir(&(0x7f0000000140)='./bus\x00')
r0 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000040)='cgroup.freeze\x00', 0x275a, 0x0)
mmap(&(0x7f0000000000/0xb36000)=nil, 0xb36000, 0x1000003, 0x28011, r0, 0x0)
lseek(r0, 0x5, 0x1)

program did not crash
testing program (duration=1m0.645956412s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mkdir-mount$overlay-chdir-openat$cgroup_ro-mmap-lseek
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000280)='./file0\x00', 0x10)
mkdir(&(0x7f0000000300)='./bus\x00', 0x0)
mount$overlay(0x0, &(0x7f00000000c0)='./bus\x00', &(0x7f0000000340), 0x0, &(0x7f0000000080)={[{@workdir={'workdir', 0x3d, './bus'}}, {@lowerdir={'lowerdir', 0x3d, './file0'}}, {@upperdir={'upperdir', 0x3d, './file1'}}]})
chdir(&(0x7f0000000140)='./bus\x00')
r0 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000040)='cgroup.freeze\x00', 0x275a, 0x0)
mmap(&(0x7f0000000000/0xb36000)=nil, 0xb36000, 0x1000003, 0x28011, r0, 0x0)
lseek(r0, 0x5, 0x1)

program did not crash
testing program (duration=1m0.645956412s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mkdir-mount$overlay-chdir-openat$cgroup_ro-mmap-lseek
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./file1\x00', 0x0)
mkdir(&(0x7f0000000300)='./bus\x00', 0x0)
mount$overlay(0x0, &(0x7f00000000c0)='./bus\x00', &(0x7f0000000340), 0x0, &(0x7f0000000080)={[{@workdir={'workdir', 0x3d, './bus'}}, {@lowerdir={'lowerdir', 0x3d, './file0'}}, {@upperdir={'upperdir', 0x3d, './file1'}}]})
chdir(&(0x7f0000000140)='./bus\x00')
r0 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000040)='cgroup.freeze\x00', 0x275a, 0x0)
mmap(&(0x7f0000000000/0xb36000)=nil, 0xb36000, 0x1000003, 0x28011, r0, 0x0)
lseek(r0, 0x5, 0x1)

program did not crash
testing program (duration=1m0.645956412s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mkdirat-mkdir-mount$overlay-chdir-openat$cgroup_ro-mmap-lseek
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, 0x0, 0x10)
mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./file1\x00', 0x0)
mkdir(&(0x7f0000000300)='./bus\x00', 0x0)
mount$overlay(0x0, &(0x7f00000000c0)='./bus\x00', &(0x7f0000000340), 0x0, &(0x7f0000000080)={[{@workdir={'workdir', 0x3d, './bus'}}, {@lowerdir={'lowerdir', 0x3d, './file0'}}, {@upperdir={'upperdir', 0x3d, './file1'}}]})
chdir(&(0x7f0000000140)='./bus\x00')
r0 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000040)='cgroup.freeze\x00', 0x275a, 0x0)
mmap(&(0x7f0000000000/0xb36000)=nil, 0xb36000, 0x1000003, 0x28011, r0, 0x0)
lseek(r0, 0x5, 0x1)

program did not crash
testing program (duration=1m0.645956412s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mkdirat-mkdir-mount$overlay-chdir-openat$cgroup_ro-mmap-lseek
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000280)='./file0\x00', 0x10)
mkdirat(0xffffffffffffff9c, 0x0, 0x0)
mkdir(&(0x7f0000000300)='./bus\x00', 0x0)
mount$overlay(0x0, &(0x7f00000000c0)='./bus\x00', &(0x7f0000000340), 0x0, &(0x7f0000000080)={[{@workdir={'workdir', 0x3d, './bus'}}, {@lowerdir={'lowerdir', 0x3d, './file0'}}, {@upperdir={'upperdir', 0x3d, './file1'}}]})
chdir(&(0x7f0000000140)='./bus\x00')
r0 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000040)='cgroup.freeze\x00', 0x275a, 0x0)
mmap(&(0x7f0000000000/0xb36000)=nil, 0xb36000, 0x1000003, 0x28011, r0, 0x0)
lseek(r0, 0x5, 0x1)

program did not crash
testing program (duration=1m0.645956412s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mkdirat-mkdir-mount$overlay-chdir-openat$cgroup_ro-mmap-lseek
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000280)='./file0\x00', 0x10)
mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./file1\x00', 0x0)
mkdir(0x0, 0x0)
mount$overlay(0x0, &(0x7f00000000c0)='./bus\x00', &(0x7f0000000340), 0x0, &(0x7f0000000080)={[{@workdir={'workdir', 0x3d, './bus'}}, {@lowerdir={'lowerdir', 0x3d, './file0'}}, {@upperdir={'upperdir', 0x3d, './file1'}}]})
chdir(&(0x7f0000000140)='./bus\x00')
r0 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000040)='cgroup.freeze\x00', 0x275a, 0x0)
mmap(&(0x7f0000000000/0xb36000)=nil, 0xb36000, 0x1000003, 0x28011, r0, 0x0)
lseek(r0, 0x5, 0x1)

program did not crash
testing program (duration=1m0.645956412s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mkdirat-mkdir-mount$overlay-chdir-openat$cgroup_ro-mmap-lseek
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000280)='./file0\x00', 0x10)
mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./file1\x00', 0x0)
mkdir(&(0x7f0000000300)='./bus\x00', 0x0)
mount$overlay(0x0, 0x0, &(0x7f0000000340), 0x0, &(0x7f0000000080)={[{@workdir={'workdir', 0x3d, './bus'}}, {@lowerdir={'lowerdir', 0x3d, './file0'}}, {@upperdir={'upperdir', 0x3d, './file1'}}]})
chdir(&(0x7f0000000140)='./bus\x00')
r0 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000040)='cgroup.freeze\x00', 0x275a, 0x0)
mmap(&(0x7f0000000000/0xb36000)=nil, 0xb36000, 0x1000003, 0x28011, r0, 0x0)
lseek(r0, 0x5, 0x1)

program did not crash
testing program (duration=1m0.645956412s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mkdirat-mkdir-mount$overlay-chdir-openat$cgroup_ro-mmap-lseek
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000280)='./file0\x00', 0x10)
mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./file1\x00', 0x0)
mkdir(&(0x7f0000000300)='./bus\x00', 0x0)
mount$overlay(0x0, &(0x7f00000000c0)='./bus\x00', 0x0, 0x0, &(0x7f0000000080)={[{@workdir={'workdir', 0x3d, './bus'}}, {@lowerdir={'lowerdir', 0x3d, './file0'}}, {@upperdir={'upperdir', 0x3d, './file1'}}]})
chdir(&(0x7f0000000140)='./bus\x00')
r0 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000040)='cgroup.freeze\x00', 0x275a, 0x0)
mmap(&(0x7f0000000000/0xb36000)=nil, 0xb36000, 0x1000003, 0x28011, r0, 0x0)
lseek(r0, 0x5, 0x1)

program did not crash
testing program (duration=1m0.645956412s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mkdirat-mkdir-mount$overlay-chdir-openat$cgroup_ro-mmap-lseek
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000280)='./file0\x00', 0x10)
mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./file1\x00', 0x0)
mkdir(&(0x7f0000000300)='./bus\x00', 0x0)
mount$overlay(0x0, &(0x7f00000000c0)='./bus\x00', &(0x7f0000000340), 0x0, 0x0)
chdir(&(0x7f0000000140)='./bus\x00')
r0 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000040)='cgroup.freeze\x00', 0x275a, 0x0)
mmap(&(0x7f0000000000/0xb36000)=nil, 0xb36000, 0x1000003, 0x28011, r0, 0x0)
lseek(r0, 0x5, 0x1)

program did not crash
testing program (duration=1m0.645956412s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mkdirat-mkdir-mount$overlay-chdir-openat$cgroup_ro-mmap-lseek
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000280)='./file0\x00', 0x10)
mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./file1\x00', 0x0)
mkdir(&(0x7f0000000300)='./bus\x00', 0x0)
mount$overlay(0x0, &(0x7f00000000c0)='./bus\x00', &(0x7f0000000340), 0x0, &(0x7f0000000080))
chdir(&(0x7f0000000140)='./bus\x00')
r0 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000040)='cgroup.freeze\x00', 0x275a, 0x0)
mmap(&(0x7f0000000000/0xb36000)=nil, 0xb36000, 0x1000003, 0x28011, r0, 0x0)
lseek(r0, 0x5, 0x1)

program did not crash
testing program (duration=1m0.645956412s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mkdirat-mkdir-mount$overlay-chdir-openat$cgroup_ro-mmap-lseek
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000280)='./file0\x00', 0x10)
mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./file1\x00', 0x0)
mkdir(&(0x7f0000000300)='./bus\x00', 0x0)
mount$overlay(0x0, &(0x7f00000000c0)='./bus\x00', &(0x7f0000000340), 0x0, &(0x7f0000000080)={[{@workdir={'workdir', 0x3d, './bus'}}, {@lowerdir={'lowerdir', 0x3d, './file0'}}, {@upperdir={'upperdir', 0x3d, './file1'}}]})
chdir(0x0)
r0 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000040)='cgroup.freeze\x00', 0x275a, 0x0)
mmap(&(0x7f0000000000/0xb36000)=nil, 0xb36000, 0x1000003, 0x28011, r0, 0x0)
lseek(r0, 0x5, 0x1)

program did not crash
testing program (duration=1m0.645956412s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mkdirat-mkdir-mount$overlay-chdir-openat$cgroup_ro-mmap-lseek
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000280)='./file0\x00', 0x10)
mkdirat(0xffffffffffffff9c, &(0x7f0000000140)='./file1\x00', 0x0)
mkdir(&(0x7f0000000300)='./bus\x00', 0x0)
mount$overlay(0x0, &(0x7f00000000c0)='./bus\x00', &(0x7f0000000340), 0x0, &(0x7f0000000080)={[{@workdir={'workdir', 0x3d, './bus'}}, {@lowerdir={'lowerdir', 0x3d, './file0'}}, {@upperdir={'upperdir', 0x3d, './file1'}}]})
chdir(&(0x7f0000000140)='./bus\x00')
r0 = openat$cgroup_ro(0xffffffffffffff9c, 0x0, 0x275a, 0x0)
mmap(&(0x7f0000000000/0xb36000)=nil, 0xb36000, 0x1000003, 0x28011, r0, 0x0)
lseek(r0, 0x5, 0x1)

program did not crash
extracting C reproducer
testing compiled C program (duration=1m0.645956412s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mkdirat-mkdir-mount$overlay-chdir-openat$cgroup_ro-mmap-lseek
program crashed: WARNING in file_seek_cur_needs_f_lock
simplifying C reproducer
testing compiled C program (duration=1m0.645956412s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mkdirat-mkdir-mount$overlay-chdir-openat$cgroup_ro-mmap-lseek
program crashed: WARNING in file_seek_cur_needs_f_lock
testing compiled C program (duration=1m0.645956412s, {Threaded:false 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mkdirat-mkdir-mount$overlay-chdir-openat$cgroup_ro-mmap-lseek
program crashed: WARNING in file_seek_cur_needs_f_lock
testing compiled C program (duration=1m0.645956412s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mkdirat-mkdir-mount$overlay-chdir-openat$cgroup_ro-mmap-lseek
program crashed: WARNING in file_seek_cur_needs_f_lock
testing compiled C program (duration=1m0.645956412s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mkdirat-mkdir-mount$overlay-chdir-openat$cgroup_ro-mmap-lseek
program crashed: WARNING in file_seek_cur_needs_f_lock
testing compiled C program (duration=1m0.645956412s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mkdirat-mkdir-mount$overlay-chdir-openat$cgroup_ro-mmap-lseek
program crashed: WARNING in file_seek_cur_needs_f_lock
testing compiled C program (duration=1m0.645956412s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mkdirat-mkdir-mount$overlay-chdir-openat$cgroup_ro-mmap-lseek
program crashed: WARNING in file_seek_cur_needs_f_lock
testing compiled C program (duration=1m0.645956412s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mkdirat-mkdir-mount$overlay-chdir-openat$cgroup_ro-mmap-lseek
program crashed: WARNING in file_seek_cur_needs_f_lock
reproducing took 41m46.605618552s
repro crashed as (corrupted=false):
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5827 at fs/file.c:1202 file_seek_cur_needs_f_lock+0x11f/0x150 fs/file.c:1201
Modules linked in:
CPU: 0 UID: 0 PID: 5827 Comm: syz-executor123 Not tainted 6.15.0-rc1-syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:file_seek_cur_needs_f_lock+0x11f/0x150 fs/file.c:1201
Code: 74 22 e8 84 62 7d ff eb 05 e8 7d 62 7d ff b0 01 5b 41 5e 41 5f 5d c3 cc cc cc cc e8 6b 62 7d ff 31 c0 eb ec e8 62 62 7d ff 90 <0f> 0b 90 eb df 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 00 ff ff ff 48
RSP: 0018:ffffc90003fefe20 EFLAGS: 00010293
RAX: ffffffff8245e1fe RBX: 0000000000000000 RCX: ffff888031043c00
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88807a9ec090
RBP: 0000000000008000 R08: ffff88807a9ec097 R09: 1ffff1100f53d812
R10: dffffc0000000000 R11: ffffed100f53d813 R12: ffff88802e787300
R13: 0000000000000005 R14: ffff88807a9ec090 R15: bfffffffffffffff
FS:  000055557bcb3380(0000) GS:ffff888124fc9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f89aafd70d0 CR3: 000000007b3c6000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 generic_file_llseek_size+0xa7/0x4b0 fs/read_write.c:178
 ovl_llseek+0x189/0x220 fs/overlayfs/file.c:277
 vfs_llseek fs/read_write.c:387 [inline]
 ksys_lseek fs/read_write.c:400 [inline]
 __do_sys_lseek fs/read_write.c:410 [inline]
 __se_sys_lseek fs/read_write.c:408 [inline]
 __x64_sys_lseek+0x14c/0x1e0 fs/read_write.c:408
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f89aaf60bf9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 17 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff45c8d108 EFLAGS: 00000246 ORIG_RAX: 0000000000000008
RAX: ffffffffffffffda RBX: 0000200000000140 RCX: 00007f89aaf60bf9
RDX: 0000000000000001 RSI: 0000000000000005 RDI: 0000000000000003
RBP: 00007f89aafd35f0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000001
R13: 431bde82d7b634db R14: 0000000000000001 R15: 0000000000000001
 </TASK>

final repro crashed as (corrupted=false):
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5827 at fs/file.c:1202 file_seek_cur_needs_f_lock+0x11f/0x150 fs/file.c:1201
Modules linked in:
CPU: 0 UID: 0 PID: 5827 Comm: syz-executor123 Not tainted 6.15.0-rc1-syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:file_seek_cur_needs_f_lock+0x11f/0x150 fs/file.c:1201
Code: 74 22 e8 84 62 7d ff eb 05 e8 7d 62 7d ff b0 01 5b 41 5e 41 5f 5d c3 cc cc cc cc e8 6b 62 7d ff 31 c0 eb ec e8 62 62 7d ff 90 <0f> 0b 90 eb df 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 00 ff ff ff 48
RSP: 0018:ffffc90003fefe20 EFLAGS: 00010293
RAX: ffffffff8245e1fe RBX: 0000000000000000 RCX: ffff888031043c00
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88807a9ec090
RBP: 0000000000008000 R08: ffff88807a9ec097 R09: 1ffff1100f53d812
R10: dffffc0000000000 R11: ffffed100f53d813 R12: ffff88802e787300
R13: 0000000000000005 R14: ffff88807a9ec090 R15: bfffffffffffffff
FS:  000055557bcb3380(0000) GS:ffff888124fc9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f89aafd70d0 CR3: 000000007b3c6000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 generic_file_llseek_size+0xa7/0x4b0 fs/read_write.c:178
 ovl_llseek+0x189/0x220 fs/overlayfs/file.c:277
 vfs_llseek fs/read_write.c:387 [inline]
 ksys_lseek fs/read_write.c:400 [inline]
 __do_sys_lseek fs/read_write.c:410 [inline]
 __se_sys_lseek fs/read_write.c:408 [inline]
 __x64_sys_lseek+0x14c/0x1e0 fs/read_write.c:408
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f89aaf60bf9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 17 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff45c8d108 EFLAGS: 00000246 ORIG_RAX: 0000000000000008
RAX: ffffffffffffffda RBX: 0000200000000140 RCX: 00007f89aaf60bf9
RDX: 0000000000000001 RSI: 0000000000000005 RDI: 0000000000000003
RBP: 00007f89aafd35f0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000001
R13: 431bde82d7b634db R14: 0000000000000001 R15: 0000000000000001
 </TASK>