Extracting prog: 52.009202464s
Minimizing prog: 11m30.066381893s
Simplifying prog options: 0s
Extracting C: 21.528186364s
Simplifying C: 5m7.279946617s


extracting reproducer from 37 programs
first checking the prog from the crash report
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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket-socketpair$unix-ioctl$sock_SIOCGIFINDEX-sendmsg$nl_route_sched-sendmsg$nl_route_sched
detailed listing:
executing program 0:
r0 = socket(0x10, 0x3, 0x0)
socketpair$unix(0x1, 0x5, 0x0, &(0x7f0000000240)={0xffffffffffffffff, <r1=>0xffffffffffffffff})
ioctl$sock_SIOCGIFINDEX(r1, 0x8933, &(0x7f0000000000)={'lo\x00', <r2=>0x0})
sendmsg$nl_route_sched(r0, &(0x7f0000000040)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000080)=@newqdisc={0x40, 0x24, 0xd0f, 0x70bd2d, 0x0, {0x60, 0x0, 0x0, r2, {0x0, 0xa}, {0xffff, 0xffff}, {0x0, 0xffff}}, [@qdisc_kind_options=@q_pfifo_head_drop={{0x14}, {0x8, 0x2, 0x2}}]}, 0x40}}, 0x44080)
sendmsg$nl_route_sched(r0, &(0x7f0000000280)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000100)=@newqdisc={0x34, 0x24, 0xd0f, 0x70bd25, 0x0, {0x60, 0x0, 0x0, r2, {}, {0xffe0, 0xa}, {0x0, 0x10}}, [@qdisc_kind_options=@q_codel={{0xa}, {0x4}}]}, 0x34}, 0x1, 0x0, 0x0, 0x55}, 0x4000)

program crashed: general protection fault in qdisc_tree_reduce_backlog
single: successfully extracted reproducer
found reproducer with 5 syscalls
minimizing guilty program
testing program (duration=32.616831699s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket-socketpair$unix-ioctl$sock_SIOCGIFINDEX-sendmsg$nl_route_sched
detailed listing:
executing program 0:
r0 = socket(0x10, 0x3, 0x0)
socketpair$unix(0x1, 0x5, 0x0, &(0x7f0000000240)={0xffffffffffffffff, <r1=>0xffffffffffffffff})
ioctl$sock_SIOCGIFINDEX(r1, 0x8933, &(0x7f0000000000)={'lo\x00', <r2=>0x0})
sendmsg$nl_route_sched(r0, &(0x7f0000000040)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000080)=@newqdisc={0x40, 0x24, 0xd0f, 0x70bd2d, 0x0, {0x60, 0x0, 0x0, r2, {0x0, 0xa}, {0xffff, 0xffff}, {0x0, 0xffff}}, [@qdisc_kind_options=@q_pfifo_head_drop={{0x14}, {0x8, 0x2, 0x2}}]}, 0x40}}, 0x44080)

program did not crash
testing program (duration=32.616831699s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket-socketpair$unix-ioctl$sock_SIOCGIFINDEX-sendmsg$nl_route_sched
detailed listing:
executing program 0:
r0 = socket(0x10, 0x3, 0x0)
socketpair$unix(0x1, 0x5, 0x0, &(0x7f0000000240)={0xffffffffffffffff, <r1=>0xffffffffffffffff})
ioctl$sock_SIOCGIFINDEX(r1, 0x8933, &(0x7f0000000000)={'lo\x00', <r2=>0x0})
sendmsg$nl_route_sched(r0, &(0x7f0000000280)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000100)=@newqdisc={0x34, 0x24, 0xd0f, 0x70bd25, 0x0, {0x60, 0x0, 0x0, r2, {}, {0xffe0, 0xa}, {0x0, 0x10}}, [@qdisc_kind_options=@q_codel={{0xa}, {0x4}}]}, 0x34}, 0x1, 0x0, 0x0, 0x55}, 0x4000)

program did not crash
testing program (duration=32.616831699s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket-socketpair$unix-sendmsg$nl_route_sched-sendmsg$nl_route_sched
detailed listing:
executing program 0:
r0 = socket(0x10, 0x3, 0x0)
socketpair$unix(0x1, 0x5, 0x0, &(0x7f0000000240))
sendmsg$nl_route_sched(r0, &(0x7f0000000040)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000080)=@newqdisc={0x40, 0x24, 0xd0f, 0x70bd2d, 0x0, {0x60, 0x0, 0x0, 0x0, {0x0, 0xa}, {0xffff, 0xffff}, {0x0, 0xffff}}, [@qdisc_kind_options=@q_pfifo_head_drop={{0x14}, {0x8, 0x2, 0x2}}]}, 0x40}}, 0x44080)
sendmsg$nl_route_sched(r0, &(0x7f0000000280)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000100)=@newqdisc={0x34, 0x24, 0xd0f, 0x70bd25, 0x0, {0x60, 0x0, 0x0, 0x0, {}, {0xffe0, 0xa}, {0x0, 0x10}}, [@qdisc_kind_options=@q_codel={{0xa}, {0x4}}]}, 0x34}, 0x1, 0x0, 0x0, 0x55}, 0x4000)

program did not crash
testing program (duration=32.616831699s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket-ioctl$sock_SIOCGIFINDEX-sendmsg$nl_route_sched-sendmsg$nl_route_sched
detailed listing:
executing program 0:
r0 = socket(0x10, 0x3, 0x0)
ioctl$sock_SIOCGIFINDEX(0xffffffffffffffff, 0x8933, &(0x7f0000000000)={'lo\x00', <r1=>0x0})
sendmsg$nl_route_sched(r0, &(0x7f0000000040)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000080)=@newqdisc={0x40, 0x24, 0xd0f, 0x70bd2d, 0x0, {0x60, 0x0, 0x0, r1, {0x0, 0xa}, {0xffff, 0xffff}, {0x0, 0xffff}}, [@qdisc_kind_options=@q_pfifo_head_drop={{0x14}, {0x8, 0x2, 0x2}}]}, 0x40}}, 0x44080)
sendmsg$nl_route_sched(r0, &(0x7f0000000280)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000100)=@newqdisc={0x34, 0x24, 0xd0f, 0x70bd25, 0x0, {0x60, 0x0, 0x0, r1, {}, {0xffe0, 0xa}, {0x0, 0x10}}, [@qdisc_kind_options=@q_codel={{0xa}, {0x4}}]}, 0x34}, 0x1, 0x0, 0x0, 0x55}, 0x4000)

program did not crash
testing program (duration=32.616831699s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socketpair$unix-ioctl$sock_SIOCGIFINDEX-sendmsg$nl_route_sched-sendmsg$nl_route_sched
detailed listing:
executing program 0:
socketpair$unix(0x1, 0x5, 0x0, &(0x7f0000000240)={0xffffffffffffffff, <r0=>0xffffffffffffffff})
ioctl$sock_SIOCGIFINDEX(r0, 0x8933, &(0x7f0000000000)={'lo\x00', <r1=>0x0})
sendmsg$nl_route_sched(0xffffffffffffffff, &(0x7f0000000040)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000080)=@newqdisc={0x40, 0x24, 0xd0f, 0x70bd2d, 0x0, {0x60, 0x0, 0x0, r1, {0x0, 0xa}, {0xffff, 0xffff}, {0x0, 0xffff}}, [@qdisc_kind_options=@q_pfifo_head_drop={{0x14}, {0x8, 0x2, 0x2}}]}, 0x40}}, 0x44080)
sendmsg$nl_route_sched(0xffffffffffffffff, &(0x7f0000000280)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000100)=@newqdisc={0x34, 0x24, 0xd0f, 0x70bd25, 0x0, {0x60, 0x0, 0x0, r1, {}, {0xffe0, 0xa}, {0x0, 0x10}}, [@qdisc_kind_options=@q_codel={{0xa}, {0x4}}]}, 0x34}, 0x1, 0x0, 0x0, 0x55}, 0x4000)

program did not crash
testing program (duration=32.616831699s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket-socketpair$unix-ioctl$sock_SIOCGIFINDEX-sendmsg$nl_route_sched-sendmsg$nl_route_sched
detailed listing:
executing program 0:
r0 = socket(0x10, 0x3, 0x0)
socketpair$unix(0x1, 0x5, 0x0, 0x0)
ioctl$sock_SIOCGIFINDEX(0xffffffffffffffff, 0x8933, &(0x7f0000000000)={'lo\x00', <r1=>0x0})
sendmsg$nl_route_sched(r0, &(0x7f0000000040)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000080)=@newqdisc={0x40, 0x24, 0xd0f, 0x70bd2d, 0x0, {0x60, 0x0, 0x0, r1, {0x0, 0xa}, {0xffff, 0xffff}, {0x0, 0xffff}}, [@qdisc_kind_options=@q_pfifo_head_drop={{0x14}, {0x8, 0x2, 0x2}}]}, 0x40}}, 0x44080)
sendmsg$nl_route_sched(r0, &(0x7f0000000280)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000100)=@newqdisc={0x34, 0x24, 0xd0f, 0x70bd25, 0x0, {0x60, 0x0, 0x0, r1, {}, {0xffe0, 0xa}, {0x0, 0x10}}, [@qdisc_kind_options=@q_codel={{0xa}, {0x4}}]}, 0x34}, 0x1, 0x0, 0x0, 0x55}, 0x4000)

program did not crash
testing program (duration=32.616831699s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket-socketpair$unix-ioctl$sock_SIOCGIFINDEX-sendmsg$nl_route_sched-sendmsg$nl_route_sched
detailed listing:
executing program 0:
r0 = socket(0x10, 0x3, 0x0)
socketpair$unix(0x1, 0x5, 0x0, &(0x7f0000000240)={0xffffffffffffffff, <r1=>0xffffffffffffffff})
ioctl$sock_SIOCGIFINDEX(r1, 0x8933, 0x0)
sendmsg$nl_route_sched(r0, &(0x7f0000000040)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000080)=@newqdisc={0x40, 0x24, 0xd0f, 0x70bd2d, 0x0, {0x60, 0x0, 0x0, 0x0, {0x0, 0xa}, {0xffff, 0xffff}, {0x0, 0xffff}}, [@qdisc_kind_options=@q_pfifo_head_drop={{0x14}, {0x8, 0x2, 0x2}}]}, 0x40}}, 0x44080)
sendmsg$nl_route_sched(r0, &(0x7f0000000280)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000100)=@newqdisc={0x34, 0x24, 0xd0f, 0x70bd25, 0x0, {0x60, 0x0, 0x0, 0x0, {}, {0xffe0, 0xa}, {0x0, 0x10}}, [@qdisc_kind_options=@q_codel={{0xa}, {0x4}}]}, 0x34}, 0x1, 0x0, 0x0, 0x55}, 0x4000)

program did not crash
testing program (duration=32.616831699s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket-socketpair$unix-ioctl$sock_SIOCGIFINDEX-sendmsg$nl_route_sched-sendmsg$nl_route_sched
detailed listing:
executing program 0:
r0 = socket(0x10, 0x3, 0x0)
socketpair$unix(0x1, 0x5, 0x0, &(0x7f0000000240)={0xffffffffffffffff, <r1=>0xffffffffffffffff})
ioctl$sock_SIOCGIFINDEX(r1, 0x8933, &(0x7f0000000000)={'lo\x00', <r2=>0x0})
sendmsg$nl_route_sched(r0, 0x0, 0x44080)
sendmsg$nl_route_sched(r0, &(0x7f0000000280)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000100)=@newqdisc={0x34, 0x24, 0xd0f, 0x70bd25, 0x0, {0x60, 0x0, 0x0, r2, {}, {0xffe0, 0xa}, {0x0, 0x10}}, [@qdisc_kind_options=@q_codel={{0xa}, {0x4}}]}, 0x34}, 0x1, 0x0, 0x0, 0x55}, 0x4000)

program did not crash
testing program (duration=32.616831699s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket-socketpair$unix-ioctl$sock_SIOCGIFINDEX-sendmsg$nl_route_sched-sendmsg$nl_route_sched
detailed listing:
executing program 0:
r0 = socket(0x10, 0x3, 0x0)
socketpair$unix(0x1, 0x5, 0x0, &(0x7f0000000240)={0xffffffffffffffff, <r1=>0xffffffffffffffff})
ioctl$sock_SIOCGIFINDEX(r1, 0x8933, &(0x7f0000000000)={'lo\x00', <r2=>0x0})
sendmsg$nl_route_sched(r0, &(0x7f0000000040)={0x0, 0x0, 0x0}, 0x44080)
sendmsg$nl_route_sched(r0, &(0x7f0000000280)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000100)=@newqdisc={0x34, 0x24, 0xd0f, 0x70bd25, 0x0, {0x60, 0x0, 0x0, r2, {}, {0xffe0, 0xa}, {0x0, 0x10}}, [@qdisc_kind_options=@q_codel={{0xa}, {0x4}}]}, 0x34}, 0x1, 0x0, 0x0, 0x55}, 0x4000)

program did not crash
testing program (duration=32.616831699s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket-socketpair$unix-ioctl$sock_SIOCGIFINDEX-sendmsg$nl_route_sched-sendmsg$nl_route_sched
detailed listing:
executing program 0:
r0 = socket(0x10, 0x3, 0x0)
socketpair$unix(0x1, 0x5, 0x0, &(0x7f0000000240)={0xffffffffffffffff, <r1=>0xffffffffffffffff})
ioctl$sock_SIOCGIFINDEX(r1, 0x8933, &(0x7f0000000000)={'lo\x00', <r2=>0x0})
sendmsg$nl_route_sched(r0, &(0x7f0000000040)={0x0, 0x0, &(0x7f0000000780)={0x0}}, 0x44080)
sendmsg$nl_route_sched(r0, &(0x7f0000000280)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000100)=@newqdisc={0x34, 0x24, 0xd0f, 0x70bd25, 0x0, {0x60, 0x0, 0x0, r2, {}, {0xffe0, 0xa}, {0x0, 0x10}}, [@qdisc_kind_options=@q_codel={{0xa}, {0x4}}]}, 0x34}, 0x1, 0x0, 0x0, 0x55}, 0x4000)

program did not crash
testing program (duration=32.616831699s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket-socketpair$unix-ioctl$sock_SIOCGIFINDEX-sendmsg$nl_route_sched-sendmsg$nl_route_sched
detailed listing:
executing program 0:
r0 = socket(0x10, 0x3, 0x0)
socketpair$unix(0x1, 0x5, 0x0, &(0x7f0000000240)={0xffffffffffffffff, <r1=>0xffffffffffffffff})
ioctl$sock_SIOCGIFINDEX(r1, 0x8933, &(0x7f0000000000)={'lo\x00', <r2=>0x0})
sendmsg$nl_route_sched(r0, &(0x7f0000000040)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000080)=@newqdisc={0x40, 0x24, 0xd0f, 0x70bd2d, 0x0, {0x60, 0x0, 0x0, r2, {0x0, 0xa}, {0xffff, 0xffff}, {0x0, 0xffff}}, [@qdisc_kind_options=@q_pfifo_head_drop={{0x14}, {0x8, 0x2, 0x2}}]}, 0x40}}, 0x44080)
sendmsg$nl_route_sched(r0, 0x0, 0x4000)

program did not crash
testing program (duration=32.616831699s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket-socketpair$unix-ioctl$sock_SIOCGIFINDEX-sendmsg$nl_route_sched-sendmsg$nl_route_sched
detailed listing:
executing program 0:
r0 = socket(0x10, 0x3, 0x0)
socketpair$unix(0x1, 0x5, 0x0, &(0x7f0000000240)={0xffffffffffffffff, <r1=>0xffffffffffffffff})
ioctl$sock_SIOCGIFINDEX(r1, 0x8933, &(0x7f0000000000)={'lo\x00', <r2=>0x0})
sendmsg$nl_route_sched(r0, &(0x7f0000000040)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000080)=@newqdisc={0x40, 0x24, 0xd0f, 0x70bd2d, 0x0, {0x60, 0x0, 0x0, r2, {0x0, 0xa}, {0xffff, 0xffff}, {0x0, 0xffff}}, [@qdisc_kind_options=@q_pfifo_head_drop={{0x14}, {0x8, 0x2, 0x2}}]}, 0x40}}, 0x44080)
sendmsg$nl_route_sched(r0, &(0x7f0000000280)={0x0, 0x0, 0x0, 0x1, 0x0, 0x0, 0x55}, 0x4000)

program did not crash
testing program (duration=32.616831699s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket-socketpair$unix-ioctl$sock_SIOCGIFINDEX-sendmsg$nl_route_sched-sendmsg$nl_route_sched
detailed listing:
executing program 0:
r0 = socket(0x10, 0x3, 0x0)
socketpair$unix(0x1, 0x5, 0x0, &(0x7f0000000240)={0xffffffffffffffff, <r1=>0xffffffffffffffff})
ioctl$sock_SIOCGIFINDEX(r1, 0x8933, &(0x7f0000000000)={'lo\x00', <r2=>0x0})
sendmsg$nl_route_sched(r0, &(0x7f0000000040)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000080)=@newqdisc={0x40, 0x24, 0xd0f, 0x70bd2d, 0x0, {0x60, 0x0, 0x0, r2, {0x0, 0xa}, {0xffff, 0xffff}, {0x0, 0xffff}}, [@qdisc_kind_options=@q_pfifo_head_drop={{0x14}, {0x8, 0x2, 0x2}}]}, 0x40}}, 0x44080)
sendmsg$nl_route_sched(r0, &(0x7f0000000280)={0x0, 0x0, &(0x7f0000000780)={0x0}, 0x1, 0x0, 0x0, 0x55}, 0x4000)

program did not crash
extracting C reproducer
testing compiled C program (duration=32.616831699s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket-socketpair$unix-ioctl$sock_SIOCGIFINDEX-sendmsg$nl_route_sched-sendmsg$nl_route_sched
program crashed: general protection fault in qdisc_tree_reduce_backlog
simplifying C reproducer
testing compiled C program (duration=32.616831699s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket-socketpair$unix-ioctl$sock_SIOCGIFINDEX-sendmsg$nl_route_sched-sendmsg$nl_route_sched
program crashed: general protection fault in qdisc_tree_reduce_backlog
testing compiled C program (duration=32.616831699s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket-socketpair$unix-ioctl$sock_SIOCGIFINDEX-sendmsg$nl_route_sched-sendmsg$nl_route_sched
program crashed: general protection fault in qdisc_tree_reduce_backlog
testing compiled C program (duration=32.616831699s, {Threaded:false Repeat:false 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}}): socket-socketpair$unix-ioctl$sock_SIOCGIFINDEX-sendmsg$nl_route_sched-sendmsg$nl_route_sched
program crashed: general protection fault in qdisc_tree_reduce_backlog
testing compiled C program (duration=32.616831699s, {Threaded:false Repeat:false 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}}): socket-socketpair$unix-ioctl$sock_SIOCGIFINDEX-sendmsg$nl_route_sched-sendmsg$nl_route_sched
program crashed: general protection fault in qdisc_tree_reduce_backlog
testing compiled C program (duration=32.616831699s, {Threaded:false Repeat:false 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}}): socket-socketpair$unix-ioctl$sock_SIOCGIFINDEX-sendmsg$nl_route_sched-sendmsg$nl_route_sched
program crashed: general protection fault in qdisc_tree_reduce_backlog
testing compiled C program (duration=32.616831699s, {Threaded:false Repeat:false 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}}): socket-socketpair$unix-ioctl$sock_SIOCGIFINDEX-sendmsg$nl_route_sched-sendmsg$nl_route_sched
program crashed: general protection fault in qdisc_tree_reduce_backlog
testing program (duration=32.616831699s, {Threaded:false Repeat:false 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}}): socket-socketpair$unix-ioctl$sock_SIOCGIFINDEX-sendmsg$nl_route_sched-sendmsg$nl_route_sched
detailed listing:
executing program 0:
r0 = socket(0x10, 0x3, 0x0)
socketpair$unix(0x1, 0x5, 0x0, &(0x7f0000000240)={0xffffffffffffffff, <r1=>0xffffffffffffffff})
ioctl$sock_SIOCGIFINDEX(r1, 0x8933, &(0x7f0000000000)={'lo\x00', <r2=>0x0})
sendmsg$nl_route_sched(r0, &(0x7f0000000040)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000080)=@newqdisc={0x40, 0x24, 0xd0f, 0x70bd2d, 0x0, {0x60, 0x0, 0x0, r2, {0x0, 0xa}, {0xffff, 0xffff}, {0x0, 0xffff}}, [@qdisc_kind_options=@q_pfifo_head_drop={{0x14}, {0x8, 0x2, 0x2}}]}, 0x40}}, 0x44080)
sendmsg$nl_route_sched(r0, &(0x7f0000000280)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000100)=@newqdisc={0x34, 0x24, 0xd0f, 0x70bd25, 0x0, {0x60, 0x0, 0x0, r2, {}, {0xffe0, 0xa}, {0x0, 0x10}}, [@qdisc_kind_options=@q_codel={{0xa}, {0x4}}]}, 0x34}, 0x1, 0x0, 0x0, 0x55}, 0x4000)

program crashed: general protection fault in qdisc_tree_reduce_backlog
validation run: crashed=true
testing program (duration=32.616831699s, {Threaded:false Repeat:false 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}}): socket-socketpair$unix-ioctl$sock_SIOCGIFINDEX-sendmsg$nl_route_sched-sendmsg$nl_route_sched
detailed listing:
executing program 0:
r0 = socket(0x10, 0x3, 0x0)
socketpair$unix(0x1, 0x5, 0x0, &(0x7f0000000240)={0xffffffffffffffff, <r1=>0xffffffffffffffff})
ioctl$sock_SIOCGIFINDEX(r1, 0x8933, &(0x7f0000000000)={'lo\x00', <r2=>0x0})
sendmsg$nl_route_sched(r0, &(0x7f0000000040)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000080)=@newqdisc={0x40, 0x24, 0xd0f, 0x70bd2d, 0x0, {0x60, 0x0, 0x0, r2, {0x0, 0xa}, {0xffff, 0xffff}, {0x0, 0xffff}}, [@qdisc_kind_options=@q_pfifo_head_drop={{0x14}, {0x8, 0x2, 0x2}}]}, 0x40}}, 0x44080)
sendmsg$nl_route_sched(r0, &(0x7f0000000280)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000100)=@newqdisc={0x34, 0x24, 0xd0f, 0x70bd25, 0x0, {0x60, 0x0, 0x0, r2, {}, {0xffe0, 0xa}, {0x0, 0x10}}, [@qdisc_kind_options=@q_codel={{0xa}, {0x4}}]}, 0x34}, 0x1, 0x0, 0x0, 0x55}, 0x4000)

program crashed: general protection fault in qdisc_tree_reduce_backlog
validation run: crashed=true
testing program (duration=32.616831699s, {Threaded:false Repeat:false 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}}): socket-socketpair$unix-ioctl$sock_SIOCGIFINDEX-sendmsg$nl_route_sched-sendmsg$nl_route_sched
detailed listing:
executing program 0:
r0 = socket(0x10, 0x3, 0x0)
socketpair$unix(0x1, 0x5, 0x0, &(0x7f0000000240)={0xffffffffffffffff, <r1=>0xffffffffffffffff})
ioctl$sock_SIOCGIFINDEX(r1, 0x8933, &(0x7f0000000000)={'lo\x00', <r2=>0x0})
sendmsg$nl_route_sched(r0, &(0x7f0000000040)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000080)=@newqdisc={0x40, 0x24, 0xd0f, 0x70bd2d, 0x0, {0x60, 0x0, 0x0, r2, {0x0, 0xa}, {0xffff, 0xffff}, {0x0, 0xffff}}, [@qdisc_kind_options=@q_pfifo_head_drop={{0x14}, {0x8, 0x2, 0x2}}]}, 0x40}}, 0x44080)
sendmsg$nl_route_sched(r0, &(0x7f0000000280)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000100)=@newqdisc={0x34, 0x24, 0xd0f, 0x70bd25, 0x0, {0x60, 0x0, 0x0, r2, {}, {0xffe0, 0xa}, {0x0, 0x10}}, [@qdisc_kind_options=@q_codel={{0xa}, {0x4}}]}, 0x34}, 0x1, 0x0, 0x0, 0x55}, 0x4000)

program crashed: general protection fault in qdisc_tree_reduce_backlog
validation run: crashed=true
reproducing took 20m18.785510052s
repro crashed as (corrupted=false):
general protection fault, probably for non-canonical address 0xdffffc0000000004: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000020-0x0000000000000027]
CPU: 1 PID: 369 Comm: syz.2.16 Not tainted 5.15.188-syzkaller-00606-g6b619c45dff5 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:qdisc_tree_reduce_backlog+0x181/0x340 net/sched/sch_api.c:795
Code: e8 f4 89 d7 fd 4d 89 ef 83 7d d0 00 74 0a e8 d6 12 99 fd e9 80 00 00 00 4d 8b 36 49 8d 46 20 48 89 c1 48 c1 e9 03 48 89 4d b8 <80> 3c 19 00 48 89 45 d0 74 0d 48 8b 7d d0 e8 bc 89 d7 fd 48 8b 45
RSP: 0018:ffffc90000c16f08 EFLAGS: 00010202
RAX: 0000000000000020 RBX: dffffc0000000000 RCX: 0000000000000004
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000c16f50 R08: ffff88810f3813c0 R09: 0000000000000002
R10: 00000000ffffffff R11: 0000000000000000 R12: 00000000000affe0
R13: ffff88812cbfa000 R14: 0000000000000000 R15: ffff88812cbfa000
FS:  000055559158d500(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f445614e394 CR3: 000000012bc8c000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 codel_change+0x8d1/0xc00 net/sched/sch_codel.c:183
 codel_init+0x1a8/0x390 net/sched/sch_codel.c:202
 qdisc_create+0x7ed/0x11a0 net/sched/sch_api.c:1261
 tc_modify_qdisc+0x896/0x1480 net/sched/sch_api.c:-1
 rtnetlink_rcv_msg+0x9e4/0xb90 net/core/rtnetlink.c:5650
 netlink_rcv_skb+0x1e0/0x430 net/netlink/af_netlink.c:2493
 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:5668
 netlink_unicast_kernel net/netlink/af_netlink.c:1315 [inline]
 netlink_unicast+0x87c/0xa40 net/netlink/af_netlink.c:1341
 netlink_sendmsg+0x86a/0xb70 net/netlink/af_netlink.c:1909
 sock_sendmsg_nosec net/socket.c:704 [inline]
 __sock_sendmsg net/socket.c:716 [inline]
 ____sys_sendmsg+0x5a2/0x8c0 net/socket.c:2436
 ___sys_sendmsg+0x1f0/0x260 net/socket.c:2490
 __sys_sendmsg net/socket.c:2519 [inline]
 __do_sys_sendmsg net/socket.c:2528 [inline]
 __se_sys_sendmsg net/socket.c:2526 [inline]
 __x64_sys_sendmsg+0x1e2/0x2a0 net/socket.c:2526
 x64_sys_call+0x4b/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:47
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f44560b1929
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff83bac908 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f44562d8fa0 RCX: 00007f44560b1929
RDX: 0000000000004000 RSI: 0000200000000280 RDI: 0000000000000003
RBP: 00007f4456133b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f44562d8fa0 R14: 00007f44562d8fa0 R15: 0000000000000003
 </TASK>
Modules linked in:
---[ end trace 49b561cda7166c9d ]---
RIP: 0010:qdisc_tree_reduce_backlog+0x181/0x340 net/sched/sch_api.c:795
Code: e8 f4 89 d7 fd 4d 89 ef 83 7d d0 00 74 0a e8 d6 12 99 fd e9 80 00 00 00 4d 8b 36 49 8d 46 20 48 89 c1 48 c1 e9 03 48 89 4d b8 <80> 3c 19 00 48 89 45 d0 74 0d 48 8b 7d d0 e8 bc 89 d7 fd 48 8b 45
RSP: 0018:ffffc90000c16f08 EFLAGS: 00010202
RAX: 0000000000000020 RBX: dffffc0000000000 RCX: 0000000000000004
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000c16f50 R08: ffff88810f3813c0 R09: 0000000000000002
R10: 00000000ffffffff R11: 0000000000000000 R12: 00000000000affe0
R13: ffff88812cbfa000 R14: 0000000000000000 R15: ffff88812cbfa000
FS:  000055559158d500(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f445614e394 CR3: 000000012bc8c000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	e8 f4 89 d7 fd       	call   0xfdd789f9
   5:	4d 89 ef             	mov    %r13,%r15
   8:	83 7d d0 00          	cmpl   $0x0,-0x30(%rbp)
   c:	74 0a                	je     0x18
   e:	e8 d6 12 99 fd       	call   0xfd9912e9
  13:	e9 80 00 00 00       	jmp    0x98
  18:	4d 8b 36             	mov    (%r14),%r14
  1b:	49 8d 46 20          	lea    0x20(%r14),%rax
  1f:	48 89 c1             	mov    %rax,%rcx
  22:	48 c1 e9 03          	shr    $0x3,%rcx
  26:	48 89 4d b8          	mov    %rcx,-0x48(%rbp)
* 2a:	80 3c 19 00          	cmpb   $0x0,(%rcx,%rbx,1) <-- trapping instruction
  2e:	48 89 45 d0          	mov    %rax,-0x30(%rbp)
  32:	74 0d                	je     0x41
  34:	48 8b 7d d0          	mov    -0x30(%rbp),%rdi
  38:	e8 bc 89 d7 fd       	call   0xfdd789f9
  3d:	48                   	rex.W
  3e:	8b                   	.byte 0x8b
  3f:	45                   	rex.RB

final repro crashed as (corrupted=false):
general protection fault, probably for non-canonical address 0xdffffc0000000004: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000020-0x0000000000000027]
CPU: 1 PID: 369 Comm: syz.2.16 Not tainted 5.15.188-syzkaller-00606-g6b619c45dff5 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:qdisc_tree_reduce_backlog+0x181/0x340 net/sched/sch_api.c:795
Code: e8 f4 89 d7 fd 4d 89 ef 83 7d d0 00 74 0a e8 d6 12 99 fd e9 80 00 00 00 4d 8b 36 49 8d 46 20 48 89 c1 48 c1 e9 03 48 89 4d b8 <80> 3c 19 00 48 89 45 d0 74 0d 48 8b 7d d0 e8 bc 89 d7 fd 48 8b 45
RSP: 0018:ffffc90000c16f08 EFLAGS: 00010202
RAX: 0000000000000020 RBX: dffffc0000000000 RCX: 0000000000000004
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000c16f50 R08: ffff88810f3813c0 R09: 0000000000000002
R10: 00000000ffffffff R11: 0000000000000000 R12: 00000000000affe0
R13: ffff88812cbfa000 R14: 0000000000000000 R15: ffff88812cbfa000
FS:  000055559158d500(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f445614e394 CR3: 000000012bc8c000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 codel_change+0x8d1/0xc00 net/sched/sch_codel.c:183
 codel_init+0x1a8/0x390 net/sched/sch_codel.c:202
 qdisc_create+0x7ed/0x11a0 net/sched/sch_api.c:1261
 tc_modify_qdisc+0x896/0x1480 net/sched/sch_api.c:-1
 rtnetlink_rcv_msg+0x9e4/0xb90 net/core/rtnetlink.c:5650
 netlink_rcv_skb+0x1e0/0x430 net/netlink/af_netlink.c:2493
 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:5668
 netlink_unicast_kernel net/netlink/af_netlink.c:1315 [inline]
 netlink_unicast+0x87c/0xa40 net/netlink/af_netlink.c:1341
 netlink_sendmsg+0x86a/0xb70 net/netlink/af_netlink.c:1909
 sock_sendmsg_nosec net/socket.c:704 [inline]
 __sock_sendmsg net/socket.c:716 [inline]
 ____sys_sendmsg+0x5a2/0x8c0 net/socket.c:2436
 ___sys_sendmsg+0x1f0/0x260 net/socket.c:2490
 __sys_sendmsg net/socket.c:2519 [inline]
 __do_sys_sendmsg net/socket.c:2528 [inline]
 __se_sys_sendmsg net/socket.c:2526 [inline]
 __x64_sys_sendmsg+0x1e2/0x2a0 net/socket.c:2526
 x64_sys_call+0x4b/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:47
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f44560b1929
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff83bac908 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f44562d8fa0 RCX: 00007f44560b1929
RDX: 0000000000004000 RSI: 0000200000000280 RDI: 0000000000000003
RBP: 00007f4456133b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f44562d8fa0 R14: 00007f44562d8fa0 R15: 0000000000000003
 </TASK>
Modules linked in:
---[ end trace 49b561cda7166c9d ]---
RIP: 0010:qdisc_tree_reduce_backlog+0x181/0x340 net/sched/sch_api.c:795
Code: e8 f4 89 d7 fd 4d 89 ef 83 7d d0 00 74 0a e8 d6 12 99 fd e9 80 00 00 00 4d 8b 36 49 8d 46 20 48 89 c1 48 c1 e9 03 48 89 4d b8 <80> 3c 19 00 48 89 45 d0 74 0d 48 8b 7d d0 e8 bc 89 d7 fd 48 8b 45
RSP: 0018:ffffc90000c16f08 EFLAGS: 00010202
RAX: 0000000000000020 RBX: dffffc0000000000 RCX: 0000000000000004
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000c16f50 R08: ffff88810f3813c0 R09: 0000000000000002
R10: 00000000ffffffff R11: 0000000000000000 R12: 00000000000affe0
R13: ffff88812cbfa000 R14: 0000000000000000 R15: ffff88812cbfa000
FS:  000055559158d500(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f445614e394 CR3: 000000012bc8c000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	e8 f4 89 d7 fd       	call   0xfdd789f9
   5:	4d 89 ef             	mov    %r13,%r15
   8:	83 7d d0 00          	cmpl   $0x0,-0x30(%rbp)
   c:	74 0a                	je     0x18
   e:	e8 d6 12 99 fd       	call   0xfd9912e9
  13:	e9 80 00 00 00       	jmp    0x98
  18:	4d 8b 36             	mov    (%r14),%r14
  1b:	49 8d 46 20          	lea    0x20(%r14),%rax
  1f:	48 89 c1             	mov    %rax,%rcx
  22:	48 c1 e9 03          	shr    $0x3,%rcx
  26:	48 89 4d b8          	mov    %rcx,-0x48(%rbp)
* 2a:	80 3c 19 00          	cmpb   $0x0,(%rcx,%rbx,1) <-- trapping instruction
  2e:	48 89 45 d0          	mov    %rax,-0x30(%rbp)
  32:	74 0d                	je     0x41
  34:	48 8b 7d d0          	mov    -0x30(%rbp),%rdi
  38:	e8 bc 89 d7 fd       	call   0xfdd789f9
  3d:	48                   	rex.W
  3e:	8b                   	.byte 0x8b
  3f:	45                   	rex.RB