Extracting prog: 58.54395471s
Minimizing prog: 11m27.841897838s
Simplifying prog options: 0s
Extracting C: 25.923619585s
Simplifying C: 10m6.349483232s


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: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}}): mkdirat-mount-openat-write-mkdirat-mount-openat-read
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./trace\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='./trace\x00', &(0x7f0000000040)='tracefs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0)
write(r0, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./debug\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./debug\x00', &(0x7f00000000c0)='debugfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000100)='./debug/tracing/trace_pipe\x00', 0xe0180, 0x0)
read(r1, &(0x7f0000000040)=""/12, 0xc)

program crashed: KASAN: use-after-free Read in ring_buffer_peek
single: successfully extracted reproducer
found reproducer with 8 syscalls
minimizing guilty program
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: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}}): mkdirat-mount-openat-write-mkdirat-mount-openat
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./trace\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='./trace\x00', &(0x7f0000000040)='tracefs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0)
write(r0, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./debug\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./debug\x00', &(0x7f00000000c0)='debugfs\x00', 0x0, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000100)='./debug/tracing/trace_pipe\x00', 0xe0180, 0x0)

program did not crash
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: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}}): mkdirat-mount-openat-write-mkdirat-mount-read
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./trace\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='./trace\x00', &(0x7f0000000040)='tracefs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0)
write(r0, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./debug\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./debug\x00', &(0x7f00000000c0)='debugfs\x00', 0x0, 0x0)
read(0xffffffffffffffff, &(0x7f0000000040)=""/12, 0xc)

program did not crash
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: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}}): mkdirat-mount-openat-write-mkdirat-openat-read
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./trace\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='./trace\x00', &(0x7f0000000040)='tracefs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0)
write(r0, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./debug\x00', 0x1ff)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000100)='./debug/tracing/trace_pipe\x00', 0xe0180, 0x0)
read(r1, &(0x7f0000000040)=""/12, 0xc)

program did not crash
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: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}}): mkdirat-mount-openat-write-mount-openat-read
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./trace\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='./trace\x00', &(0x7f0000000040)='tracefs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0)
write(r0, 0x0, 0x0)
mount(0x0, &(0x7f0000000080)='./debug\x00', &(0x7f00000000c0)='debugfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000100)='./debug/tracing/trace_pipe\x00', 0xe0180, 0x0)
read(r1, &(0x7f0000000040)=""/12, 0xc)

program did not crash
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: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}}): mkdirat-mount-openat-mkdirat-mount-openat-read
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./trace\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='./trace\x00', &(0x7f0000000040)='tracefs\x00', 0x0, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000080)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./debug\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./debug\x00', &(0x7f00000000c0)='debugfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000100)='./debug/tracing/trace_pipe\x00', 0xe0180, 0x0)
read(r0, &(0x7f0000000040)=""/12, 0xc)

program did not crash
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: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}}): mkdirat-mount-write-mkdirat-mount-openat-read
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./trace\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='./trace\x00', &(0x7f0000000040)='tracefs\x00', 0x0, 0x0)
write(0xffffffffffffffff, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./debug\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./debug\x00', &(0x7f00000000c0)='debugfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000100)='./debug/tracing/trace_pipe\x00', 0xe0180, 0x0)
read(r0, &(0x7f0000000040)=""/12, 0xc)

program did not crash
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: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}}): mkdirat-openat-write-mkdirat-mount-openat-read
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./trace\x00', 0x1ff)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0)
write(r0, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./debug\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./debug\x00', &(0x7f00000000c0)='debugfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000100)='./debug/tracing/trace_pipe\x00', 0xe0180, 0x0)
read(r1, &(0x7f0000000040)=""/12, 0xc)

program did not crash
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: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}}): mount-openat-write-mkdirat-mount-openat-read
detailed listing:
executing program 0:
mount(0x0, &(0x7f0000000000)='./trace\x00', &(0x7f0000000040)='tracefs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0)
write(r0, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./debug\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./debug\x00', &(0x7f00000000c0)='debugfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000100)='./debug/tracing/trace_pipe\x00', 0xe0180, 0x0)
read(r1, &(0x7f0000000040)=""/12, 0xc)

program did not crash
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: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}}): mkdirat-mount-openat-write-mkdirat-mount-openat-read
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, 0x0, 0x1ff)
mount(0x0, &(0x7f0000000000)='./trace\x00', &(0x7f0000000040)='tracefs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0)
write(r0, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./debug\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./debug\x00', &(0x7f00000000c0)='debugfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000100)='./debug/tracing/trace_pipe\x00', 0xe0180, 0x0)
read(r1, &(0x7f0000000040)=""/12, 0xc)

program did not crash
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: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}}): mkdirat-mount-openat-write-mkdirat-mount-openat-read
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./trace\x00', 0x1ff)
mount(0x0, 0x0, &(0x7f0000000040)='tracefs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0)
write(r0, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./debug\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./debug\x00', &(0x7f00000000c0)='debugfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000100)='./debug/tracing/trace_pipe\x00', 0xe0180, 0x0)
read(r1, &(0x7f0000000040)=""/12, 0xc)

program did not crash
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: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}}): mkdirat-mount-openat-write-mkdirat-mount-openat-read
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./trace\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='./trace\x00', 0x0, 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0)
write(r0, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./debug\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./debug\x00', &(0x7f00000000c0)='debugfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000100)='./debug/tracing/trace_pipe\x00', 0xe0180, 0x0)
read(r1, &(0x7f0000000040)=""/12, 0xc)

program did not crash
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: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}}): mkdirat-mount-openat-write-mkdirat-mount-openat-read
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./trace\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='./trace\x00', &(0x7f0000000040)='tracefs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, 0x0, 0x2, 0x0)
write(r0, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./debug\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./debug\x00', &(0x7f00000000c0)='debugfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000100)='./debug/tracing/trace_pipe\x00', 0xe0180, 0x0)
read(r1, &(0x7f0000000040)=""/12, 0xc)

program did not crash
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: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}}): mkdirat-mount-openat-write-mkdirat-mount-openat-read
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./trace\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='./trace\x00', &(0x7f0000000040)='tracefs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0)
write(r0, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, 0x0, 0x1ff)
mount(0x0, &(0x7f0000000080)='./debug\x00', &(0x7f00000000c0)='debugfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000100)='./debug/tracing/trace_pipe\x00', 0xe0180, 0x0)
read(r1, &(0x7f0000000040)=""/12, 0xc)

program did not crash
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: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}}): mkdirat-mount-openat-write-mkdirat-mount-openat-read
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./trace\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='./trace\x00', &(0x7f0000000040)='tracefs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0)
write(r0, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./debug\x00', 0x1ff)
mount(0x0, 0x0, &(0x7f00000000c0)='debugfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000100)='./debug/tracing/trace_pipe\x00', 0xe0180, 0x0)
read(r1, &(0x7f0000000040)=""/12, 0xc)

program did not crash
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: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}}): mkdirat-mount-openat-write-mkdirat-mount-openat-read
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./trace\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='./trace\x00', &(0x7f0000000040)='tracefs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0)
write(r0, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./debug\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./debug\x00', 0x0, 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000100)='./debug/tracing/trace_pipe\x00', 0xe0180, 0x0)
read(r1, &(0x7f0000000040)=""/12, 0xc)

program did not crash
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: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}}): mkdirat-mount-openat-write-mkdirat-mount-openat-read
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./trace\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='./trace\x00', &(0x7f0000000040)='tracefs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0)
write(r0, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./debug\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./debug\x00', &(0x7f00000000c0)='debugfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, 0x0, 0xe0180, 0x0)
read(r1, &(0x7f0000000040)=""/12, 0xc)

program did not crash
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: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}}): mkdirat-mount-openat-write-mkdirat-mount-openat-read
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./trace\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='./trace\x00', &(0x7f0000000040)='tracefs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0)
write(r0, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./debug\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./debug\x00', &(0x7f00000000c0)='debugfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000100)='./debug/tracing/trace_pipe\x00', 0xe0180, 0x0)
read(r1, 0x0, 0x0)

program did not crash
extracting C reproducer
testing compiled C 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: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}}): mkdirat-mount-openat-write-mkdirat-mount-openat-read
program crashed: KASAN: use-after-free Read in ring_buffer_peek
simplifying C reproducer
testing compiled C program (duration=30s, {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: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}}): mkdirat-mount-openat-write-mkdirat-mount-openat-read
program crashed: KASAN: use-after-free Read in ring_buffer_peek
testing compiled C program (duration=30s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:false Cgroups:false 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}}): mkdirat-mount-openat-write-mkdirat-mount-openat-read
program did not crash
testing compiled C program (duration=30s, {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: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}}): mkdirat-mount-openat-write-mkdirat-mount-openat-read
program did not crash
testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-mkdirat-mount-openat-read
program did not crash
testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false 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}}): mkdirat-mount-openat-write-mkdirat-mount-openat-read
program did not crash
testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false 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}}): mkdirat-mount-openat-write-mkdirat-mount-openat-read
program crashed: KASAN: use-after-free Read in ring_buffer_peek
testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:false 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}}): mkdirat-mount-openat-write-mkdirat-mount-openat-read
program did not crash
testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:true Cgroups:false 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}}): mkdirat-mount-openat-write-mkdirat-mount-openat-read
program crashed: KASAN: use-after-free Read in ring_buffer_peek
testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:true Cgroups:false BinfmtMisc:false 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}}): mkdirat-mount-openat-write-mkdirat-mount-openat-read
program did not crash
testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:true Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false 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}}): mkdirat-mount-openat-write-mkdirat-mount-openat-read
program did not crash
testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:true Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-mkdirat-mount-openat-read
program crashed: UBSAN: array-index-out-of-bounds in vm_area_dup
a never seen crash title: UBSAN: array-index-out-of-bounds in vm_area_dup, ignore
testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:true Cgroups:false 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:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-mkdirat-mount-openat-read
program did not crash
testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:true Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-mkdirat-mount-openat-read
program crashed: KASAN: use-after-free Read in ring_buffer_peek
testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:true Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-mkdirat-mount-openat-read
program crashed: KASAN: use-after-free Read in ring_buffer_peek
testing program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:true Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-mkdirat-mount-openat-read
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./trace\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='./trace\x00', &(0x7f0000000040)='tracefs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0)
write(r0, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./debug\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./debug\x00', &(0x7f00000000c0)='debugfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000100)='./debug/tracing/trace_pipe\x00', 0xe0180, 0x0)
read(r1, &(0x7f0000000040)=""/12, 0xc)

program crashed: KASAN: use-after-free Read in ring_buffer_peek
validation run: crashed=true
testing program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:true Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-mkdirat-mount-openat-read
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./trace\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='./trace\x00', &(0x7f0000000040)='tracefs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0)
write(r0, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./debug\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./debug\x00', &(0x7f00000000c0)='debugfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000100)='./debug/tracing/trace_pipe\x00', 0xe0180, 0x0)
read(r1, &(0x7f0000000040)=""/12, 0xc)

program did not crash
validation run: crashed=false
testing program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:true Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-mkdirat-mount-openat-read
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./trace\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='./trace\x00', &(0x7f0000000040)='tracefs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0)
write(r0, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./debug\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./debug\x00', &(0x7f00000000c0)='debugfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000100)='./debug/tracing/trace_pipe\x00', 0xe0180, 0x0)
read(r1, &(0x7f0000000040)=""/12, 0xc)

program did not crash
validation run: crashed=false
testing program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:true Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-mkdirat-mount-openat-read
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./trace\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='./trace\x00', &(0x7f0000000040)='tracefs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0)
write(r0, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./debug\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./debug\x00', &(0x7f00000000c0)='debugfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000100)='./debug/tracing/trace_pipe\x00', 0xe0180, 0x0)
read(r1, &(0x7f0000000040)=""/12, 0xc)

program crashed: KASAN: use-after-free Read in ring_buffer_peek
validation run: crashed=true
testing program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:true Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-mkdirat-mount-openat-read
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./trace\x00', 0x1ff)
mount(0x0, &(0x7f0000000000)='./trace\x00', &(0x7f0000000040)='tracefs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0)
write(r0, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./debug\x00', 0x1ff)
mount(0x0, &(0x7f0000000080)='./debug\x00', &(0x7f00000000c0)='debugfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000100)='./debug/tracing/trace_pipe\x00', 0xe0180, 0x0)
read(r1, &(0x7f0000000040)=""/12, 0xc)

program crashed: KASAN: use-after-free Read in ring_buffer_peek
validation run: crashed=true
reproducing took 26m51.451845697s
repro crashed as (corrupted=false):
R13: 00007f6d13625fac R14: 00007f6d13625fa0 R15: 00007f6d13625fa0
 </TASK>
---[ end trace 0000000000000000 ]---
==================================================================
BUG: KASAN: use-after-free in rb_buffer_peek+0x88d/0x930 kernel/trace/ring_buffer.c:4920
Read of size 4 at addr ffff8881c63b6515 by task syz.5.122/499

CPU: 1 PID: 499 Comm: syz.5.122 Tainted: G        W          syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Call Trace:
 <TASK>
 __dump_stack+0x21/0x24 lib/dump_stack.c:88
 dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106
 print_address_description+0x71/0x200 mm/kasan/report.c:316
 print_report+0x4a/0x60 mm/kasan/report.c:420
 kasan_report+0x122/0x150 mm/kasan/report.c:524
 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report_generic.c:350
 rb_buffer_peek+0x88d/0x930 kernel/trace/ring_buffer.c:4920
 ring_buffer_peek+0x184/0x3b0 kernel/trace/ring_buffer.c:5115
 peek_next_entry kernel/trace/trace.c:3595 [inline]
 __find_next_entry+0x33c/0x6c0 kernel/trace/trace.c:3639
 trace_find_next_entry_inc kernel/trace/trace.c:4020 [inline]
 tracing_read_pipe+0x3d2/0xaf0 kernel/trace/trace.c:6849
 vfs_read+0x286/0x930 fs/read_write.c:468
 ksys_read+0x14a/0x260 fs/read_write.c:613
 __do_sys_read fs/read_write.c:623 [inline]
 __se_sys_read fs/read_write.c:621 [inline]
 __x64_sys_read+0x7b/0x90 fs/read_write.c:621
 x64_sys_call+0x2f/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:1
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f6d1339e559
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff87402648 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f6d13625fa0 RCX: 00007f6d1339e559
RDX: 000000000000000c RSI: 0000200000000040 RDI: 0000000000000004
RBP: 00007f6d13435ab8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6d13625fac R14: 00007f6d13625fa0 R15: 00007f6d13625fa0
 </TASK>

The buggy address belongs to the physical page:
page:ffffea000718ed80 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1c63b6
flags: 0x4000000000000000(zone=1)
raw: 4000000000000000 ffffea000718ed88 ffffea000718ed88 0000000000000000
raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner info is not present (never set?)

Memory state around the buggy address:
 ffff8881c63b6400: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8881c63b6480: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff8881c63b6500: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                         ^
 ffff8881c63b6580: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8881c63b6600: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================

final repro crashed as (corrupted=false):
R13: 00007f6d13625fac R14: 00007f6d13625fa0 R15: 00007f6d13625fa0
 </TASK>
---[ end trace 0000000000000000 ]---
==================================================================
BUG: KASAN: use-after-free in rb_buffer_peek+0x88d/0x930 kernel/trace/ring_buffer.c:4920
Read of size 4 at addr ffff8881c63b6515 by task syz.5.122/499

CPU: 1 PID: 499 Comm: syz.5.122 Tainted: G        W          syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Call Trace:
 <TASK>
 __dump_stack+0x21/0x24 lib/dump_stack.c:88
 dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106
 print_address_description+0x71/0x200 mm/kasan/report.c:316
 print_report+0x4a/0x60 mm/kasan/report.c:420
 kasan_report+0x122/0x150 mm/kasan/report.c:524
 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report_generic.c:350
 rb_buffer_peek+0x88d/0x930 kernel/trace/ring_buffer.c:4920
 ring_buffer_peek+0x184/0x3b0 kernel/trace/ring_buffer.c:5115
 peek_next_entry kernel/trace/trace.c:3595 [inline]
 __find_next_entry+0x33c/0x6c0 kernel/trace/trace.c:3639
 trace_find_next_entry_inc kernel/trace/trace.c:4020 [inline]
 tracing_read_pipe+0x3d2/0xaf0 kernel/trace/trace.c:6849
 vfs_read+0x286/0x930 fs/read_write.c:468
 ksys_read+0x14a/0x260 fs/read_write.c:613
 __do_sys_read fs/read_write.c:623 [inline]
 __se_sys_read fs/read_write.c:621 [inline]
 __x64_sys_read+0x7b/0x90 fs/read_write.c:621
 x64_sys_call+0x2f/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:1
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f6d1339e559
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff87402648 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f6d13625fa0 RCX: 00007f6d1339e559
RDX: 000000000000000c RSI: 0000200000000040 RDI: 0000000000000004
RBP: 00007f6d13435ab8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6d13625fac R14: 00007f6d13625fa0 R15: 00007f6d13625fa0
 </TASK>

The buggy address belongs to the physical page:
page:ffffea000718ed80 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1c63b6
flags: 0x4000000000000000(zone=1)
raw: 4000000000000000 ffffea000718ed88 ffffea000718ed88 0000000000000000
raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner info is not present (never set?)

Memory state around the buggy address:
 ffff8881c63b6400: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8881c63b6480: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff8881c63b6500: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                         ^
 ffff8881c63b6580: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8881c63b6600: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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