Extracting prog: 1m42.650316566s Minimizing prog: 13m25.465893531s Simplifying prog options: 0s Extracting C: 41.45130066s Simplifying C: 7m33.585692364s 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-readv-mkdirat-mount-openat-write detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000a80)='./mnt_trace\x00', 0x1ff) mount(0x0, &(0x7f0000000ac0)='./mnt_trace\x00', &(0x7f0000000b00)='tracefs\x00', 0x0, 0x0) r0 = openat(0xffffffffffffff9c, &(0x7f0000000b40)='./mnt_trace/trace_pipe\x00', 0x80840, 0x0) readv(r0, &(0x7f0000000b80)=[{&(0x7f0000000bc0)=""/53, 0x35}], 0x1) mkdirat(0xffffffffffffff9c, &(0x7f0000000400)='./trace\x00', 0x1ff) mount(0x0, &(0x7f0000000480)='./trace\x00', &(0x7f00000004c0)='tracefs\x00', 0x0, 0x0) r1 = openat(0xffffffffffffff9c, &(0x7f0000000500)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0) write(r1, 0x0, 0x0) 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-readv-mkdirat-mount-openat detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000a80)='./mnt_trace\x00', 0x1ff) mount(0x0, &(0x7f0000000ac0)='./mnt_trace\x00', &(0x7f0000000b00)='tracefs\x00', 0x0, 0x0) r0 = openat(0xffffffffffffff9c, &(0x7f0000000b40)='./mnt_trace/trace_pipe\x00', 0x80840, 0x0) readv(r0, &(0x7f0000000b80)=[{&(0x7f0000000bc0)=""/53, 0x35}], 0x1) mkdirat(0xffffffffffffff9c, &(0x7f0000000400)='./trace\x00', 0x1ff) mount(0x0, &(0x7f0000000480)='./trace\x00', &(0x7f00000004c0)='tracefs\x00', 0x0, 0x0) openat(0xffffffffffffff9c, &(0x7f0000000500)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 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-readv-mkdirat-mount-write detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000a80)='./mnt_trace\x00', 0x1ff) mount(0x0, &(0x7f0000000ac0)='./mnt_trace\x00', &(0x7f0000000b00)='tracefs\x00', 0x0, 0x0) r0 = openat(0xffffffffffffff9c, &(0x7f0000000b40)='./mnt_trace/trace_pipe\x00', 0x80840, 0x0) readv(r0, &(0x7f0000000b80)=[{&(0x7f0000000bc0)=""/53, 0x35}], 0x1) mkdirat(0xffffffffffffff9c, &(0x7f0000000400)='./trace\x00', 0x1ff) mount(0x0, &(0x7f0000000480)='./trace\x00', &(0x7f00000004c0)='tracefs\x00', 0x0, 0x0) write(0xffffffffffffffff, 0x0, 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-readv-mkdirat-openat-write detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000a80)='./mnt_trace\x00', 0x1ff) mount(0x0, &(0x7f0000000ac0)='./mnt_trace\x00', &(0x7f0000000b00)='tracefs\x00', 0x0, 0x0) r0 = openat(0xffffffffffffff9c, &(0x7f0000000b40)='./mnt_trace/trace_pipe\x00', 0x80840, 0x0) readv(r0, &(0x7f0000000b80)=[{&(0x7f0000000bc0)=""/53, 0x35}], 0x1) mkdirat(0xffffffffffffff9c, &(0x7f0000000400)='./trace\x00', 0x1ff) r1 = openat(0xffffffffffffff9c, &(0x7f0000000500)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0) write(r1, 0x0, 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-readv-mount-openat-write detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000a80)='./mnt_trace\x00', 0x1ff) mount(0x0, &(0x7f0000000ac0)='./mnt_trace\x00', &(0x7f0000000b00)='tracefs\x00', 0x0, 0x0) r0 = openat(0xffffffffffffff9c, &(0x7f0000000b40)='./mnt_trace/trace_pipe\x00', 0x80840, 0x0) readv(r0, &(0x7f0000000b80)=[{&(0x7f0000000bc0)=""/53, 0x35}], 0x1) mount(0x0, &(0x7f0000000480)='./trace\x00', &(0x7f00000004c0)='tracefs\x00', 0x0, 0x0) r1 = openat(0xffffffffffffff9c, &(0x7f0000000500)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0) write(r1, 0x0, 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-mkdirat-mount-openat-write detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000a80)='./mnt_trace\x00', 0x1ff) mount(0x0, &(0x7f0000000ac0)='./mnt_trace\x00', &(0x7f0000000b00)='tracefs\x00', 0x0, 0x0) openat(0xffffffffffffff9c, &(0x7f0000000b40)='./mnt_trace/trace_pipe\x00', 0x80840, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f0000000400)='./trace\x00', 0x1ff) mount(0x0, &(0x7f0000000480)='./trace\x00', &(0x7f00000004c0)='tracefs\x00', 0x0, 0x0) r0 = openat(0xffffffffffffff9c, &(0x7f0000000500)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0) write(r0, 0x0, 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-readv-mkdirat-mount-openat-write detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000a80)='./mnt_trace\x00', 0x1ff) mount(0x0, &(0x7f0000000ac0)='./mnt_trace\x00', &(0x7f0000000b00)='tracefs\x00', 0x0, 0x0) readv(0xffffffffffffffff, &(0x7f0000000b80)=[{&(0x7f0000000bc0)=""/53, 0x35}], 0x1) mkdirat(0xffffffffffffff9c, &(0x7f0000000400)='./trace\x00', 0x1ff) mount(0x0, &(0x7f0000000480)='./trace\x00', &(0x7f00000004c0)='tracefs\x00', 0x0, 0x0) r0 = openat(0xffffffffffffff9c, &(0x7f0000000500)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0) write(r0, 0x0, 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-openat-readv-mkdirat-mount-openat-write detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000a80)='./mnt_trace\x00', 0x1ff) r0 = openat(0xffffffffffffff9c, &(0x7f0000000b40)='./mnt_trace/trace_pipe\x00', 0x80840, 0x0) readv(r0, &(0x7f0000000b80)=[{&(0x7f0000000bc0)=""/53, 0x35}], 0x1) mkdirat(0xffffffffffffff9c, &(0x7f0000000400)='./trace\x00', 0x1ff) mount(0x0, &(0x7f0000000480)='./trace\x00', &(0x7f00000004c0)='tracefs\x00', 0x0, 0x0) r1 = openat(0xffffffffffffff9c, &(0x7f0000000500)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0) write(r1, 0x0, 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}}): mount-openat-readv-mkdirat-mount-openat-write detailed listing: executing program 0: mount(0x0, &(0x7f0000000ac0)='./mnt_trace\x00', &(0x7f0000000b00)='tracefs\x00', 0x0, 0x0) r0 = openat(0xffffffffffffff9c, &(0x7f0000000b40)='./mnt_trace/trace_pipe\x00', 0x80840, 0x0) readv(r0, &(0x7f0000000b80)=[{&(0x7f0000000bc0)=""/53, 0x35}], 0x1) mkdirat(0xffffffffffffff9c, &(0x7f0000000400)='./trace\x00', 0x1ff) mount(0x0, &(0x7f0000000480)='./trace\x00', &(0x7f00000004c0)='tracefs\x00', 0x0, 0x0) r1 = openat(0xffffffffffffff9c, &(0x7f0000000500)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0) write(r1, 0x0, 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-readv-mkdirat-mount-openat-write detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, 0x0, 0x1ff) mount(0x0, &(0x7f0000000ac0)='./mnt_trace\x00', &(0x7f0000000b00)='tracefs\x00', 0x0, 0x0) r0 = openat(0xffffffffffffff9c, &(0x7f0000000b40)='./mnt_trace/trace_pipe\x00', 0x80840, 0x0) readv(r0, &(0x7f0000000b80)=[{&(0x7f0000000bc0)=""/53, 0x35}], 0x1) mkdirat(0xffffffffffffff9c, &(0x7f0000000400)='./trace\x00', 0x1ff) mount(0x0, &(0x7f0000000480)='./trace\x00', &(0x7f00000004c0)='tracefs\x00', 0x0, 0x0) r1 = openat(0xffffffffffffff9c, &(0x7f0000000500)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0) write(r1, 0x0, 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-readv-mkdirat-mount-openat-write detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000a80)='./mnt_trace\x00', 0x1ff) mount(0x0, 0x0, &(0x7f0000000b00)='tracefs\x00', 0x0, 0x0) r0 = openat(0xffffffffffffff9c, &(0x7f0000000b40)='./mnt_trace/trace_pipe\x00', 0x80840, 0x0) readv(r0, &(0x7f0000000b80)=[{&(0x7f0000000bc0)=""/53, 0x35}], 0x1) mkdirat(0xffffffffffffff9c, &(0x7f0000000400)='./trace\x00', 0x1ff) mount(0x0, &(0x7f0000000480)='./trace\x00', &(0x7f00000004c0)='tracefs\x00', 0x0, 0x0) r1 = openat(0xffffffffffffff9c, &(0x7f0000000500)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0) write(r1, 0x0, 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-readv-mkdirat-mount-openat-write detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000a80)='./mnt_trace\x00', 0x1ff) mount(0x0, &(0x7f0000000ac0)='./mnt_trace\x00', 0x0, 0x0, 0x0) r0 = openat(0xffffffffffffff9c, &(0x7f0000000b40)='./mnt_trace/trace_pipe\x00', 0x80840, 0x0) readv(r0, &(0x7f0000000b80)=[{&(0x7f0000000bc0)=""/53, 0x35}], 0x1) mkdirat(0xffffffffffffff9c, &(0x7f0000000400)='./trace\x00', 0x1ff) mount(0x0, &(0x7f0000000480)='./trace\x00', &(0x7f00000004c0)='tracefs\x00', 0x0, 0x0) r1 = openat(0xffffffffffffff9c, &(0x7f0000000500)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0) write(r1, 0x0, 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-readv-mkdirat-mount-openat-write detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000a80)='./mnt_trace\x00', 0x1ff) mount(0x0, &(0x7f0000000ac0)='./mnt_trace\x00', &(0x7f0000000b00)='tracefs\x00', 0x0, 0x0) r0 = openat(0xffffffffffffff9c, 0x0, 0x80840, 0x0) readv(r0, &(0x7f0000000b80)=[{&(0x7f0000000bc0)=""/53, 0x35}], 0x1) mkdirat(0xffffffffffffff9c, &(0x7f0000000400)='./trace\x00', 0x1ff) mount(0x0, &(0x7f0000000480)='./trace\x00', &(0x7f00000004c0)='tracefs\x00', 0x0, 0x0) r1 = openat(0xffffffffffffff9c, &(0x7f0000000500)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0) write(r1, 0x0, 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-readv-mkdirat-mount-openat-write detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000a80)='./mnt_trace\x00', 0x1ff) mount(0x0, &(0x7f0000000ac0)='./mnt_trace\x00', &(0x7f0000000b00)='tracefs\x00', 0x0, 0x0) r0 = openat(0xffffffffffffff9c, &(0x7f0000000b40)='./mnt_trace/trace_pipe\x00', 0x80840, 0x0) readv(r0, 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f0000000400)='./trace\x00', 0x1ff) mount(0x0, &(0x7f0000000480)='./trace\x00', &(0x7f00000004c0)='tracefs\x00', 0x0, 0x0) r1 = openat(0xffffffffffffff9c, &(0x7f0000000500)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0) write(r1, 0x0, 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-readv-mkdirat-mount-openat-write detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000a80)='./mnt_trace\x00', 0x1ff) mount(0x0, &(0x7f0000000ac0)='./mnt_trace\x00', &(0x7f0000000b00)='tracefs\x00', 0x0, 0x0) r0 = openat(0xffffffffffffff9c, &(0x7f0000000b40)='./mnt_trace/trace_pipe\x00', 0x80840, 0x0) readv(r0, &(0x7f0000000b80)=[{0x0}], 0x1) mkdirat(0xffffffffffffff9c, &(0x7f0000000400)='./trace\x00', 0x1ff) mount(0x0, &(0x7f0000000480)='./trace\x00', &(0x7f00000004c0)='tracefs\x00', 0x0, 0x0) r1 = openat(0xffffffffffffff9c, &(0x7f0000000500)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0) write(r1, 0x0, 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-readv-mkdirat-mount-openat-write detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000a80)='./mnt_trace\x00', 0x1ff) mount(0x0, &(0x7f0000000ac0)='./mnt_trace\x00', &(0x7f0000000b00)='tracefs\x00', 0x0, 0x0) r0 = openat(0xffffffffffffff9c, &(0x7f0000000b40)='./mnt_trace/trace_pipe\x00', 0x80840, 0x0) readv(r0, &(0x7f0000000b80)=[{&(0x7f0000000bc0)=""/53, 0x35}], 0x1) mkdirat(0xffffffffffffff9c, 0x0, 0x1ff) mount(0x0, &(0x7f0000000480)='./trace\x00', &(0x7f00000004c0)='tracefs\x00', 0x0, 0x0) r1 = openat(0xffffffffffffff9c, &(0x7f0000000500)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0) write(r1, 0x0, 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-readv-mkdirat-mount-openat-write detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000a80)='./mnt_trace\x00', 0x1ff) mount(0x0, &(0x7f0000000ac0)='./mnt_trace\x00', &(0x7f0000000b00)='tracefs\x00', 0x0, 0x0) r0 = openat(0xffffffffffffff9c, &(0x7f0000000b40)='./mnt_trace/trace_pipe\x00', 0x80840, 0x0) readv(r0, &(0x7f0000000b80)=[{&(0x7f0000000bc0)=""/53, 0x35}], 0x1) mkdirat(0xffffffffffffff9c, &(0x7f0000000400)='./trace\x00', 0x1ff) mount(0x0, 0x0, &(0x7f00000004c0)='tracefs\x00', 0x0, 0x0) r1 = openat(0xffffffffffffff9c, &(0x7f0000000500)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0) write(r1, 0x0, 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-readv-mkdirat-mount-openat-write detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000a80)='./mnt_trace\x00', 0x1ff) mount(0x0, &(0x7f0000000ac0)='./mnt_trace\x00', &(0x7f0000000b00)='tracefs\x00', 0x0, 0x0) r0 = openat(0xffffffffffffff9c, &(0x7f0000000b40)='./mnt_trace/trace_pipe\x00', 0x80840, 0x0) readv(r0, &(0x7f0000000b80)=[{&(0x7f0000000bc0)=""/53, 0x35}], 0x1) mkdirat(0xffffffffffffff9c, &(0x7f0000000400)='./trace\x00', 0x1ff) mount(0x0, &(0x7f0000000480)='./trace\x00', 0x0, 0x0, 0x0) r1 = openat(0xffffffffffffff9c, &(0x7f0000000500)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0) write(r1, 0x0, 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-readv-mkdirat-mount-openat-write detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000a80)='./mnt_trace\x00', 0x1ff) mount(0x0, &(0x7f0000000ac0)='./mnt_trace\x00', &(0x7f0000000b00)='tracefs\x00', 0x0, 0x0) r0 = openat(0xffffffffffffff9c, &(0x7f0000000b40)='./mnt_trace/trace_pipe\x00', 0x80840, 0x0) readv(r0, &(0x7f0000000b80)=[{&(0x7f0000000bc0)=""/53, 0x35}], 0x1) mkdirat(0xffffffffffffff9c, &(0x7f0000000400)='./trace\x00', 0x1ff) mount(0x0, &(0x7f0000000480)='./trace\x00', &(0x7f00000004c0)='tracefs\x00', 0x0, 0x0) r1 = openat(0xffffffffffffff9c, 0x0, 0x2, 0x0) write(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-readv-mkdirat-mount-openat-write 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-readv-mkdirat-mount-openat-write 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-readv-mkdirat-mount-openat-write 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-readv-mkdirat-mount-openat-write 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-readv-mkdirat-mount-openat-write 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: 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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-readv-mkdirat-mount-openat-write 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: 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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-readv-mkdirat-mount-openat-write 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: 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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-readv-mkdirat-mount-openat-write program did not crash testing 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:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-readv-mkdirat-mount-openat-write detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000a80)='./mnt_trace\x00', 0x1ff) mount(0x0, &(0x7f0000000ac0)='./mnt_trace\x00', &(0x7f0000000b00)='tracefs\x00', 0x0, 0x0) r0 = openat(0xffffffffffffff9c, &(0x7f0000000b40)='./mnt_trace/trace_pipe\x00', 0x80840, 0x0) readv(r0, &(0x7f0000000b80)=[{&(0x7f0000000bc0)=""/53, 0x35}], 0x1) mkdirat(0xffffffffffffff9c, &(0x7f0000000400)='./trace\x00', 0x1ff) mount(0x0, &(0x7f0000000480)='./trace\x00', &(0x7f00000004c0)='tracefs\x00', 0x0, 0x0) r1 = openat(0xffffffffffffff9c, &(0x7f0000000500)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0) write(r1, 0x0, 0x0) 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: 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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-readv-mkdirat-mount-openat-write detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000a80)='./mnt_trace\x00', 0x1ff) mount(0x0, &(0x7f0000000ac0)='./mnt_trace\x00', &(0x7f0000000b00)='tracefs\x00', 0x0, 0x0) r0 = openat(0xffffffffffffff9c, &(0x7f0000000b40)='./mnt_trace/trace_pipe\x00', 0x80840, 0x0) readv(r0, &(0x7f0000000b80)=[{&(0x7f0000000bc0)=""/53, 0x35}], 0x1) mkdirat(0xffffffffffffff9c, &(0x7f0000000400)='./trace\x00', 0x1ff) mount(0x0, &(0x7f0000000480)='./trace\x00', &(0x7f00000004c0)='tracefs\x00', 0x0, 0x0) r1 = openat(0xffffffffffffff9c, &(0x7f0000000500)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0) write(r1, 0x0, 0x0) 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: 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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-readv-mkdirat-mount-openat-write detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000a80)='./mnt_trace\x00', 0x1ff) mount(0x0, &(0x7f0000000ac0)='./mnt_trace\x00', &(0x7f0000000b00)='tracefs\x00', 0x0, 0x0) r0 = openat(0xffffffffffffff9c, &(0x7f0000000b40)='./mnt_trace/trace_pipe\x00', 0x80840, 0x0) readv(r0, &(0x7f0000000b80)=[{&(0x7f0000000bc0)=""/53, 0x35}], 0x1) mkdirat(0xffffffffffffff9c, &(0x7f0000000400)='./trace\x00', 0x1ff) mount(0x0, &(0x7f0000000480)='./trace\x00', &(0x7f00000004c0)='tracefs\x00', 0x0, 0x0) r1 = openat(0xffffffffffffff9c, &(0x7f0000000500)='./trace/events/dwc3/dwc3_ctrl_req/inject\x00', 0x2, 0x0) write(r1, 0x0, 0x0) program crashed: KASAN: use-after-free Read in ring_buffer_peek validation run: crashed=true reproducing took 25m34.059081825s repro crashed as (corrupted=false): RDX: 0000000000000001 RSI: 0000200000000b80 RDI: 0000000000000003 RBP: 00007f37372bcaf8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f37374aafac R14: 00007f37374aafa0 R15: 00007f37374aafa0 ---[ end trace 5c47629c180235d3 ]--- ================================================================== BUG: KASAN: use-after-free in rb_buffer_peek+0x71a/0x7a0 kernel/trace/ring_buffer.c:4568 Read of size 4 at addr ffff88818606b221 by task syz.5.62/434 CPU: 1 PID: 434 Comm: syz.5.62 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026 Call Trace: __dump_stack+0x21/0x24 lib/dump_stack.c:77 dump_stack_lvl+0x1a7/0x208 lib/dump_stack.c:118 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:435 [inline] kasan_report+0x100/0x140 mm/kasan/report.c:452 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report_generic.c:308 rb_buffer_peek+0x71a/0x7a0 kernel/trace/ring_buffer.c:4568 ring_buffer_peek+0x183/0x360 kernel/trace/ring_buffer.c:4762 peek_next_entry kernel/trace/trace.c:3495 [inline] __find_next_entry+0x34d/0x6b0 kernel/trace/trace.c:3539 trace_find_next_entry_inc kernel/trace/trace.c:3619 [inline] tracing_read_pipe+0x3b8/0xab0 kernel/trace/trace.c:6410 do_loop_readv_writev include/linux/uio.h:-1 [inline] do_iter_read+0x3e9/0x5d0 fs/read_write.c:803 vfs_readv fs/read_write.c:921 [inline] do_readv+0x25d/0x450 fs/read_write.c:958 __do_sys_readv fs/read_write.c:1049 [inline] __se_sys_readv fs/read_write.c:1046 [inline] __x64_sys_readv+0x7d/0x90 fs/read_write.c:1046 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f3737224b19 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:00007fff628ce9f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 RAX: ffffffffffffffda RBX: 00007f37374aafa0 RCX: 00007f3737224b19 RDX: 0000000000000001 RSI: 0000200000000b80 RDI: 0000000000000003 RBP: 00007f37372bcaf8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f37374aafac R14: 00007f37374aafa0 R15: 00007f37374aafa0 The buggy address belongs to the page: page:ffffea0006181ac0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18606b flags: 0x4000000000000000() raw: 4000000000000000 ffffea0006181ac8 ffffea0006181ac8 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: ffff88818606b100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88818606b180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff88818606b200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff88818606b280: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88818606b300: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ================================================================== ------------[ cut here ]------------ WARNING: CPU: 1 PID: 434 at kernel/trace/ring_buffer.c:4349 arch_atomic_inc include/linux/instrumented.h:101 [inline] WARNING: CPU: 1 PID: 434 at kernel/trace/ring_buffer.c:4349 atomic_inc include/asm-generic/atomic-instrumented.h:241 [inline] WARNING: CPU: 1 PID: 434 at kernel/trace/ring_buffer.c:4349 rb_get_reader_page+0xa78/0xbf0 kernel/trace/ring_buffer.c:4348 Modules linked in: CPU: 1 PID: 434 Comm: syz.5.62 Tainted: G B W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026 RIP: 0010:rb_get_reader_page+0xa78/0xbf0 kernel/trace/ring_buffer.c:4348 Code: 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 ad 3d 38 00 48 8b 1b 48 8d 7b 08 be 04 00 00 00 e8 9c 3f 38 00 f0 ff 43 08 <0f> 0b 48 83 7c 24 20 00 75 91 e8 a9 af fd ff e9 45 fe ff ff e8 9f RSP: 0018:ffffc900025778e0 EFLAGS: 00010002 RAX: 1ffff1102000aa01 RBX: ffff888100052600 RCX: ffffffff81670704 RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffff888100052608 RBP: ffffc90002577a58 R08: ffff88810005260b R09: 1ffff1102000a4c1 R10: dffffc0000000000 R11: ffffed102000a4c2 R12: 0000000086000211 R13: 1ffff1102000a123 R14: 1ffff1102000a126 R15: dffffc0000000000 FS: 000055558cd88500(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b33863fff CR3: 00000001120bb000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rb_buffer_peek+0x60/0x7a0 kernel/trace/ring_buffer.c:4562 ring_buffer_consume+0x1b2/0x350 kernel/trace/ring_buffer.c:4842 trace_consume kernel/trace/trace.c:3630 [inline] tracing_read_pipe+0x599/0xab0 kernel/trace/trace.c:6434 do_loop_readv_writev include/linux/uio.h:-1 [inline] do_iter_read+0x3e9/0x5d0 fs/read_write.c:803 vfs_readv fs/read_write.c:921 [inline] do_readv+0x25d/0x450 fs/read_write.c:958 __do_sys_readv fs/read_write.c:1049 [inline] __se_sys_readv fs/read_write.c:1046 [inline] __x64_sys_readv+0x7d/0x90 fs/read_write.c:1046 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f3737224b19 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:00007fff628ce9f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 RAX: ffffffffffffffda RBX: 00007f37374aafa0 RCX: 00007f3737224b19 RDX: 0000000000000001 RSI: 0000200000000b80 RDI: 0000000000000003 RBP: 00007f37372bcaf8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f37374aafac R14: 00007f37374aafa0 R15: 00007f37374aafa0 ---[ end trace 5c47629c180235d4 ]--- ------------[ cut here ]------------ WARNING: CPU: 1 PID: 434 at kernel/trace/ring_buffer.c:4349 arch_atomic_inc include/linux/instrumented.h:101 [inline] WARNING: CPU: 1 PID: 434 at kernel/trace/ring_buffer.c:4349 atomic_inc include/asm-generic/atomic-instrumented.h:241 [inline] WARNING: CPU: 1 PID: 434 at kernel/trace/ring_buffer.c:4349 rb_get_reader_page+0xa78/0xbf0 kernel/trace/ring_buffer.c:4348 Modules linked in: CPU: 1 PID: 434 Comm: syz.5.62 Tainted: G B W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026 RIP: 0010:rb_get_reader_page+0xa78/0xbf0 kernel/trace/ring_buffer.c:4348 Code: 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 ad 3d 38 00 48 8b 1b 48 8d 7b 08 be 04 00 00 00 e8 9c 3f 38 00 f0 ff 43 08 <0f> 0b 48 83 7c 24 20 00 75 91 e8 a9 af fd ff e9 45 fe ff ff e8 9f RSP: 0018:ffffc90002577900 EFLAGS: 00010006 RAX: 1ffff1102000aa01 RBX: ffff888100052600 RCX: ffffffff81670704 RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffff888100052608 RBP: ffffc90002577a68 R08: ffff88810005260b R09: 1ffff1102000a4c1 R10: dffffc0000000000 R11: ffffed102000a4c2 R12: 0000000086000211 R13: 1ffff1102000a123 R14: 1ffff1102000a126 R15: dffffc0000000000 FS: 000055558cd88500(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b33863fff CR3: 00000001120bb000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rb_advance_reader+0x2b/0x6b0 kernel/trace/ring_buffer.c:4490 ring_buffer_consume+0x1e6/0x350 kernel/trace/ring_buffer.c:4845 trace_consume kernel/trace/trace.c:3630 [inline] tracing_read_pipe+0x599/0xab0 kernel/trace/trace.c:6434 do_loop_readv_writev include/linux/uio.h:-1 [inline] do_iter_read+0x3e9/0x5d0 fs/read_write.c:803 vfs_readv fs/read_write.c:921 [inline] do_readv+0x25d/0x450 fs/read_write.c:958 __do_sys_readv fs/read_write.c:1049 [inline] __se_sys_readv fs/read_write.c:1046 [inline] __x64_sys_readv+0x7d/0x90 fs/read_write.c:1046 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f3737224b19 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:00007fff628ce9f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 RAX: ffffffffffffffda RBX: 00007f37374aafa0 RCX: 00007f3737224b19 RDX: 0000000000000001 RSI: 0000200000000b80 RDI: 0000000000000003 RBP: 00007f37372bcaf8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f37374aafac R14: 00007f37374aafa0 R15: 00007f37374aafa0 ---[ end trace 5c47629c180235d5 ]--- final repro crashed as (corrupted=false): RDX: 0000000000000001 RSI: 0000200000000b80 RDI: 0000000000000003 RBP: 00007f37372bcaf8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f37374aafac R14: 00007f37374aafa0 R15: 00007f37374aafa0 ---[ end trace 5c47629c180235d3 ]--- ================================================================== BUG: KASAN: use-after-free in rb_buffer_peek+0x71a/0x7a0 kernel/trace/ring_buffer.c:4568 Read of size 4 at addr ffff88818606b221 by task syz.5.62/434 CPU: 1 PID: 434 Comm: syz.5.62 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026 Call Trace: __dump_stack+0x21/0x24 lib/dump_stack.c:77 dump_stack_lvl+0x1a7/0x208 lib/dump_stack.c:118 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:435 [inline] kasan_report+0x100/0x140 mm/kasan/report.c:452 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report_generic.c:308 rb_buffer_peek+0x71a/0x7a0 kernel/trace/ring_buffer.c:4568 ring_buffer_peek+0x183/0x360 kernel/trace/ring_buffer.c:4762 peek_next_entry kernel/trace/trace.c:3495 [inline] __find_next_entry+0x34d/0x6b0 kernel/trace/trace.c:3539 trace_find_next_entry_inc kernel/trace/trace.c:3619 [inline] tracing_read_pipe+0x3b8/0xab0 kernel/trace/trace.c:6410 do_loop_readv_writev include/linux/uio.h:-1 [inline] do_iter_read+0x3e9/0x5d0 fs/read_write.c:803 vfs_readv fs/read_write.c:921 [inline] do_readv+0x25d/0x450 fs/read_write.c:958 __do_sys_readv fs/read_write.c:1049 [inline] __se_sys_readv fs/read_write.c:1046 [inline] __x64_sys_readv+0x7d/0x90 fs/read_write.c:1046 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f3737224b19 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:00007fff628ce9f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 RAX: ffffffffffffffda RBX: 00007f37374aafa0 RCX: 00007f3737224b19 RDX: 0000000000000001 RSI: 0000200000000b80 RDI: 0000000000000003 RBP: 00007f37372bcaf8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f37374aafac R14: 00007f37374aafa0 R15: 00007f37374aafa0 The buggy address belongs to the page: page:ffffea0006181ac0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18606b flags: 0x4000000000000000() raw: 4000000000000000 ffffea0006181ac8 ffffea0006181ac8 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: ffff88818606b100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88818606b180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff88818606b200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff88818606b280: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88818606b300: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ================================================================== ------------[ cut here ]------------ WARNING: CPU: 1 PID: 434 at kernel/trace/ring_buffer.c:4349 arch_atomic_inc include/linux/instrumented.h:101 [inline] WARNING: CPU: 1 PID: 434 at kernel/trace/ring_buffer.c:4349 atomic_inc include/asm-generic/atomic-instrumented.h:241 [inline] WARNING: CPU: 1 PID: 434 at kernel/trace/ring_buffer.c:4349 rb_get_reader_page+0xa78/0xbf0 kernel/trace/ring_buffer.c:4348 Modules linked in: CPU: 1 PID: 434 Comm: syz.5.62 Tainted: G B W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026 RIP: 0010:rb_get_reader_page+0xa78/0xbf0 kernel/trace/ring_buffer.c:4348 Code: 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 ad 3d 38 00 48 8b 1b 48 8d 7b 08 be 04 00 00 00 e8 9c 3f 38 00 f0 ff 43 08 <0f> 0b 48 83 7c 24 20 00 75 91 e8 a9 af fd ff e9 45 fe ff ff e8 9f RSP: 0018:ffffc900025778e0 EFLAGS: 00010002 RAX: 1ffff1102000aa01 RBX: ffff888100052600 RCX: ffffffff81670704 RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffff888100052608 RBP: ffffc90002577a58 R08: ffff88810005260b R09: 1ffff1102000a4c1 R10: dffffc0000000000 R11: ffffed102000a4c2 R12: 0000000086000211 R13: 1ffff1102000a123 R14: 1ffff1102000a126 R15: dffffc0000000000 FS: 000055558cd88500(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b33863fff CR3: 00000001120bb000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rb_buffer_peek+0x60/0x7a0 kernel/trace/ring_buffer.c:4562 ring_buffer_consume+0x1b2/0x350 kernel/trace/ring_buffer.c:4842 trace_consume kernel/trace/trace.c:3630 [inline] tracing_read_pipe+0x599/0xab0 kernel/trace/trace.c:6434 do_loop_readv_writev include/linux/uio.h:-1 [inline] do_iter_read+0x3e9/0x5d0 fs/read_write.c:803 vfs_readv fs/read_write.c:921 [inline] do_readv+0x25d/0x450 fs/read_write.c:958 __do_sys_readv fs/read_write.c:1049 [inline] __se_sys_readv fs/read_write.c:1046 [inline] __x64_sys_readv+0x7d/0x90 fs/read_write.c:1046 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f3737224b19 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:00007fff628ce9f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 RAX: ffffffffffffffda RBX: 00007f37374aafa0 RCX: 00007f3737224b19 RDX: 0000000000000001 RSI: 0000200000000b80 RDI: 0000000000000003 RBP: 00007f37372bcaf8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f37374aafac R14: 00007f37374aafa0 R15: 00007f37374aafa0 ---[ end trace 5c47629c180235d4 ]--- ------------[ cut here ]------------ WARNING: CPU: 1 PID: 434 at kernel/trace/ring_buffer.c:4349 arch_atomic_inc include/linux/instrumented.h:101 [inline] WARNING: CPU: 1 PID: 434 at kernel/trace/ring_buffer.c:4349 atomic_inc include/asm-generic/atomic-instrumented.h:241 [inline] WARNING: CPU: 1 PID: 434 at kernel/trace/ring_buffer.c:4349 rb_get_reader_page+0xa78/0xbf0 kernel/trace/ring_buffer.c:4348 Modules linked in: CPU: 1 PID: 434 Comm: syz.5.62 Tainted: G B W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026 RIP: 0010:rb_get_reader_page+0xa78/0xbf0 kernel/trace/ring_buffer.c:4348 Code: 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 ad 3d 38 00 48 8b 1b 48 8d 7b 08 be 04 00 00 00 e8 9c 3f 38 00 f0 ff 43 08 <0f> 0b 48 83 7c 24 20 00 75 91 e8 a9 af fd ff e9 45 fe ff ff e8 9f RSP: 0018:ffffc90002577900 EFLAGS: 00010006 RAX: 1ffff1102000aa01 RBX: ffff888100052600 RCX: ffffffff81670704 RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffff888100052608 RBP: ffffc90002577a68 R08: ffff88810005260b R09: 1ffff1102000a4c1 R10: dffffc0000000000 R11: ffffed102000a4c2 R12: 0000000086000211 R13: 1ffff1102000a123 R14: 1ffff1102000a126 R15: dffffc0000000000 FS: 000055558cd88500(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b33863fff CR3: 00000001120bb000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rb_advance_reader+0x2b/0x6b0 kernel/trace/ring_buffer.c:4490 ring_buffer_consume+0x1e6/0x350 kernel/trace/ring_buffer.c:4845 trace_consume kernel/trace/trace.c:3630 [inline] tracing_read_pipe+0x599/0xab0 kernel/trace/trace.c:6434 do_loop_readv_writev include/linux/uio.h:-1 [inline] do_iter_read+0x3e9/0x5d0 fs/read_write.c:803 vfs_readv fs/read_write.c:921 [inline] do_readv+0x25d/0x450 fs/read_write.c:958 __do_sys_readv fs/read_write.c:1049 [inline] __se_sys_readv fs/read_write.c:1046 [inline] __x64_sys_readv+0x7d/0x90 fs/read_write.c:1046 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f3737224b19 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:00007fff628ce9f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 RAX: ffffffffffffffda RBX: 00007f37374aafa0 RCX: 00007f3737224b19 RDX: 0000000000000001 RSI: 0000200000000b80 RDI: 0000000000000003 RBP: 00007f37372bcaf8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f37374aafac R14: 00007f37374aafa0 R15: 00007f37374aafa0 ---[ end trace 5c47629c180235d5 ]---