Extracting prog: 24.615753767s Minimizing prog: 19m33.14501081s Simplifying prog options: 0s Extracting C: 43.650090891s Simplifying C: 3m12.271965783s extracting reproducer from 51 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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-socket$nl_route-recvmsg-setsockopt$netlink_NETLINK_ADD_MEMBERSHIP-mount$9p_fd-sendmsg$nl_route-socket$pppl2tp-syz_init_net_socket$bt_l2cap-syz_init_net_socket$bt_l2cap-madvise-pipe2-vmsplice-madvise-bind$bt_l2cap-bind$bt_l2cap-getsockopt$bt_l2cap_L2CAP_OPTIONS-socket$inet6_udp-socket$inet6_udp-connect$pppl2tp-ioctl$XFS_IOC_START_COMMIT-ioctl$XFS_IOC_START_COMMIT-setsockopt$pppl2tp_PPPOL2TP_SO_DEBUG-socket$pppl2tp-connect$pppl2tp-connect$pppl2tp-mount$cgroup detailed listing: executing program 0: socket$nl_route(0x10, 0x3, 0x0) (async) r0 = socket$nl_route(0x10, 0x3, 0x0) recvmsg(r0, &(0x7f00000006c0)={&(0x7f00000001c0)=@l2tp6={0xa, 0x0, 0x0, @private0}, 0x80, &(0x7f0000000580)=[{&(0x7f00000002c0)=""/142, 0x8e}, {&(0x7f0000000440)=""/110, 0x6e}, {&(0x7f00000004c0)=""/58, 0x3a}, {&(0x7f0000000500)=""/68, 0x44}], 0x4, &(0x7f00000005c0)=""/240, 0xf0}, 0x40012022) setsockopt$netlink_NETLINK_ADD_MEMBERSHIP(r0, 0x10e, 0xc, &(0x7f0000000000)=0x201, 0x4) mount$9p_fd(0x0, &(0x7f0000000180)='.\x00', &(0x7f0000000040), 0x0, &(0x7f00000003c0)=ANY=[@ANYBLOB='trans=fd,rfdno=', @ANYRESHEX]) sendmsg$nl_route(r0, &(0x7f0000000280)={0x0, 0x0, &(0x7f0000000040)={&(0x7f00000010c0)=ANY=[@ANYBLOB="440000004a00030000210000000000000a"], 0x44}, 0x1, 0x0, 0x0, 0x4}, 0x0) r1 = socket$pppl2tp(0x18, 0x1, 0x1) syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0) (async) r2 = syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0) madvise(&(0x7f0000000000/0x800000)=nil, 0x800000, 0xe) pipe2(&(0x7f0000000140)={0xffffffffffffffff, 0xffffffffffffffff}, 0x0) vmsplice(r3, &(0x7f0000e79000)=[{&(0x7f00003fb000)="f7", 0x7ffff000}], 0x1, 0x0) madvise(&(0x7f0000000000/0x600000)=nil, 0x600000, 0x14) bind$bt_l2cap(r2, &(0x7f0000000000)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x11}, 0x0, 0x1}, 0xe) (async) bind$bt_l2cap(r2, &(0x7f0000000000)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x11}, 0x0, 0x1}, 0xe) getsockopt$bt_l2cap_L2CAP_OPTIONS(r2, 0x6, 0x1, 0x0, &(0x7f0000000400)) socket$inet6_udp(0xa, 0x2, 0x0) (async) r4 = socket$inet6_udp(0xa, 0x2, 0x0) connect$pppl2tp(r1, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r4, {0x2, 0x0, @dev}, 0x2}}, 0x2e) ioctl$XFS_IOC_START_COMMIT(r1, 0x80585882, &(0x7f0000000080)) (async) ioctl$XFS_IOC_START_COMMIT(r1, 0x80585882, &(0x7f0000000080)={0xffffffffffffffff}) setsockopt$pppl2tp_PPPOL2TP_SO_DEBUG(r5, 0x111, 0x1, 0x6, 0x4) r6 = socket$pppl2tp(0x18, 0x1, 0x1) connect$pppl2tp(r6, &(0x7f0000000040)=@pppol2tpv3={0x18, 0x1, {0x3, 0xffffffffffffffff, {0x2, 0x4e22, @broadcast}, 0x2, 0x9800}}, 0x2e) (async) connect$pppl2tp(r6, &(0x7f0000000040)=@pppol2tpv3={0x18, 0x1, {0x3, 0xffffffffffffffff, {0x2, 0x4e22, @broadcast}, 0x2, 0x9800}}, 0x2e) mount$cgroup(0x0, &(0x7f0000000c80)='.\x00', &(0x7f0000000cc0), 0x800000, &(0x7f0000000d00)={[{@name={'name', 0x3d, '-'}}]}) program crashed: KASAN: use-after-free Read in l2tp_tunnel_get_session single: successfully extracted reproducer found reproducer with 26 syscalls minimizing guilty program testing program (duration=31.36350786s, {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}}): socket$nl_route-socket$nl_route-recvmsg-setsockopt$netlink_NETLINK_ADD_MEMBERSHIP-mount$9p_fd-sendmsg$nl_route-socket$pppl2tp-syz_init_net_socket$bt_l2cap-syz_init_net_socket$bt_l2cap-madvise-pipe2-vmsplice-madvise-bind$bt_l2cap-bind$bt_l2cap-getsockopt$bt_l2cap_L2CAP_OPTIONS-socket$inet6_udp-socket$inet6_udp-connect$pppl2tp-ioctl$XFS_IOC_START_COMMIT-ioctl$XFS_IOC_START_COMMIT-setsockopt$pppl2tp_PPPOL2TP_SO_DEBUG-socket$pppl2tp-connect$pppl2tp-connect$pppl2tp detailed listing: executing program 0: socket$nl_route(0x10, 0x3, 0x0) (async) r0 = socket$nl_route(0x10, 0x3, 0x0) recvmsg(r0, &(0x7f00000006c0)={&(0x7f00000001c0)=@l2tp6={0xa, 0x0, 0x0, @private0}, 0x80, &(0x7f0000000580)=[{&(0x7f00000002c0)=""/142, 0x8e}, {&(0x7f0000000440)=""/110, 0x6e}, {&(0x7f00000004c0)=""/58, 0x3a}, {&(0x7f0000000500)=""/68, 0x44}], 0x4, &(0x7f00000005c0)=""/240, 0xf0}, 0x40012022) setsockopt$netlink_NETLINK_ADD_MEMBERSHIP(r0, 0x10e, 0xc, &(0x7f0000000000)=0x201, 0x4) mount$9p_fd(0x0, &(0x7f0000000180)='.\x00', &(0x7f0000000040), 0x0, &(0x7f00000003c0)=ANY=[@ANYBLOB='trans=fd,rfdno=', @ANYRESHEX]) sendmsg$nl_route(r0, &(0x7f0000000280)={0x0, 0x0, &(0x7f0000000040)={&(0x7f00000010c0)=ANY=[@ANYBLOB="440000004a00030000210000000000000a"], 0x44}, 0x1, 0x0, 0x0, 0x4}, 0x0) r1 = socket$pppl2tp(0x18, 0x1, 0x1) syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0) (async) r2 = syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0) madvise(&(0x7f0000000000/0x800000)=nil, 0x800000, 0xe) pipe2(&(0x7f0000000140)={0xffffffffffffffff, 0xffffffffffffffff}, 0x0) vmsplice(r3, &(0x7f0000e79000)=[{&(0x7f00003fb000)="f7", 0x7ffff000}], 0x1, 0x0) madvise(&(0x7f0000000000/0x600000)=nil, 0x600000, 0x14) bind$bt_l2cap(r2, &(0x7f0000000000)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x11}, 0x0, 0x1}, 0xe) (async) bind$bt_l2cap(r2, &(0x7f0000000000)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x11}, 0x0, 0x1}, 0xe) getsockopt$bt_l2cap_L2CAP_OPTIONS(r2, 0x6, 0x1, 0x0, &(0x7f0000000400)) socket$inet6_udp(0xa, 0x2, 0x0) (async) r4 = socket$inet6_udp(0xa, 0x2, 0x0) connect$pppl2tp(r1, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r4, {0x2, 0x0, @dev}, 0x2}}, 0x2e) ioctl$XFS_IOC_START_COMMIT(r1, 0x80585882, &(0x7f0000000080)) (async) ioctl$XFS_IOC_START_COMMIT(r1, 0x80585882, &(0x7f0000000080)={0xffffffffffffffff}) setsockopt$pppl2tp_PPPOL2TP_SO_DEBUG(r5, 0x111, 0x1, 0x6, 0x4) r6 = socket$pppl2tp(0x18, 0x1, 0x1) connect$pppl2tp(r6, &(0x7f0000000040)=@pppol2tpv3={0x18, 0x1, {0x3, 0xffffffffffffffff, {0x2, 0x4e22, @broadcast}, 0x2, 0x9800}}, 0x2e) (async) connect$pppl2tp(r6, &(0x7f0000000040)=@pppol2tpv3={0x18, 0x1, {0x3, 0xffffffffffffffff, {0x2, 0x4e22, @broadcast}, 0x2, 0x9800}}, 0x2e) program crashed: KASAN: use-after-free Read in l2tp_tunnel_get_session testing program (duration=31.36350786s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-socket$nl_route-recvmsg-setsockopt$netlink_NETLINK_ADD_MEMBERSHIP-mount$9p_fd-sendmsg$nl_route-socket$pppl2tp-syz_init_net_socket$bt_l2cap-syz_init_net_socket$bt_l2cap-madvise-pipe2-vmsplice-madvise-bind$bt_l2cap-bind$bt_l2cap-getsockopt$bt_l2cap_L2CAP_OPTIONS-socket$inet6_udp-socket$inet6_udp-connect$pppl2tp-ioctl$XFS_IOC_START_COMMIT-ioctl$XFS_IOC_START_COMMIT-setsockopt$pppl2tp_PPPOL2TP_SO_DEBUG-socket$pppl2tp-connect$pppl2tp detailed listing: executing program 0: socket$nl_route(0x10, 0x3, 0x0) (async) r0 = socket$nl_route(0x10, 0x3, 0x0) recvmsg(r0, &(0x7f00000006c0)={&(0x7f00000001c0)=@l2tp6={0xa, 0x0, 0x0, @private0}, 0x80, &(0x7f0000000580)=[{&(0x7f00000002c0)=""/142, 0x8e}, {&(0x7f0000000440)=""/110, 0x6e}, {&(0x7f00000004c0)=""/58, 0x3a}, {&(0x7f0000000500)=""/68, 0x44}], 0x4, &(0x7f00000005c0)=""/240, 0xf0}, 0x40012022) setsockopt$netlink_NETLINK_ADD_MEMBERSHIP(r0, 0x10e, 0xc, &(0x7f0000000000)=0x201, 0x4) mount$9p_fd(0x0, &(0x7f0000000180)='.\x00', &(0x7f0000000040), 0x0, &(0x7f00000003c0)=ANY=[@ANYBLOB='trans=fd,rfdno=', @ANYRESHEX]) sendmsg$nl_route(r0, &(0x7f0000000280)={0x0, 0x0, &(0x7f0000000040)={&(0x7f00000010c0)=ANY=[@ANYBLOB="440000004a00030000210000000000000a"], 0x44}, 0x1, 0x0, 0x0, 0x4}, 0x0) r1 = socket$pppl2tp(0x18, 0x1, 0x1) syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0) (async) r2 = syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0) madvise(&(0x7f0000000000/0x800000)=nil, 0x800000, 0xe) pipe2(&(0x7f0000000140)={0xffffffffffffffff, 0xffffffffffffffff}, 0x0) vmsplice(r3, &(0x7f0000e79000)=[{&(0x7f00003fb000)="f7", 0x7ffff000}], 0x1, 0x0) madvise(&(0x7f0000000000/0x600000)=nil, 0x600000, 0x14) bind$bt_l2cap(r2, &(0x7f0000000000)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x11}, 0x0, 0x1}, 0xe) (async) bind$bt_l2cap(r2, &(0x7f0000000000)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x11}, 0x0, 0x1}, 0xe) getsockopt$bt_l2cap_L2CAP_OPTIONS(r2, 0x6, 0x1, 0x0, &(0x7f0000000400)) socket$inet6_udp(0xa, 0x2, 0x0) (async) r4 = socket$inet6_udp(0xa, 0x2, 0x0) connect$pppl2tp(r1, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r4, {0x2, 0x0, @dev}, 0x2}}, 0x2e) ioctl$XFS_IOC_START_COMMIT(r1, 0x80585882, &(0x7f0000000080)) (async) ioctl$XFS_IOC_START_COMMIT(r1, 0x80585882, &(0x7f0000000080)={0xffffffffffffffff}) setsockopt$pppl2tp_PPPOL2TP_SO_DEBUG(r5, 0x111, 0x1, 0x6, 0x4) r6 = socket$pppl2tp(0x18, 0x1, 0x1) connect$pppl2tp(r6, &(0x7f0000000040)=@pppol2tpv3={0x18, 0x1, {0x3, 0xffffffffffffffff, {0x2, 0x4e22, @broadcast}, 0x2, 0x9800}}, 0x2e) (async) program crashed: KASAN: use-after-free Read in l2tp_tunnel_get_session testing program (duration=31.36350786s, {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}}): socket$nl_route-socket$nl_route-recvmsg-setsockopt$netlink_NETLINK_ADD_MEMBERSHIP-mount$9p_fd-sendmsg$nl_route-socket$pppl2tp-syz_init_net_socket$bt_l2cap-syz_init_net_socket$bt_l2cap-madvise-pipe2-vmsplice-madvise-bind$bt_l2cap-bind$bt_l2cap-getsockopt$bt_l2cap_L2CAP_OPTIONS-socket$inet6_udp-socket$inet6_udp-connect$pppl2tp-ioctl$XFS_IOC_START_COMMIT-ioctl$XFS_IOC_START_COMMIT-setsockopt$pppl2tp_PPPOL2TP_SO_DEBUG-socket$pppl2tp detailed listing: executing program 0: socket$nl_route(0x10, 0x3, 0x0) (async) r0 = socket$nl_route(0x10, 0x3, 0x0) recvmsg(r0, &(0x7f00000006c0)={&(0x7f00000001c0)=@l2tp6={0xa, 0x0, 0x0, @private0}, 0x80, &(0x7f0000000580)=[{&(0x7f00000002c0)=""/142, 0x8e}, {&(0x7f0000000440)=""/110, 0x6e}, {&(0x7f00000004c0)=""/58, 0x3a}, {&(0x7f0000000500)=""/68, 0x44}], 0x4, &(0x7f00000005c0)=""/240, 0xf0}, 0x40012022) setsockopt$netlink_NETLINK_ADD_MEMBERSHIP(r0, 0x10e, 0xc, &(0x7f0000000000)=0x201, 0x4) mount$9p_fd(0x0, &(0x7f0000000180)='.\x00', &(0x7f0000000040), 0x0, &(0x7f00000003c0)=ANY=[@ANYBLOB='trans=fd,rfdno=', @ANYRESHEX]) sendmsg$nl_route(r0, &(0x7f0000000280)={0x0, 0x0, &(0x7f0000000040)={&(0x7f00000010c0)=ANY=[@ANYBLOB="440000004a00030000210000000000000a"], 0x44}, 0x1, 0x0, 0x0, 0x4}, 0x0) r1 = socket$pppl2tp(0x18, 0x1, 0x1) syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0) (async) r2 = syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0) madvise(&(0x7f0000000000/0x800000)=nil, 0x800000, 0xe) pipe2(&(0x7f0000000140)={0xffffffffffffffff, 0xffffffffffffffff}, 0x0) vmsplice(r3, &(0x7f0000e79000)=[{&(0x7f00003fb000)="f7", 0x7ffff000}], 0x1, 0x0) madvise(&(0x7f0000000000/0x600000)=nil, 0x600000, 0x14) bind$bt_l2cap(r2, &(0x7f0000000000)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x11}, 0x0, 0x1}, 0xe) (async) bind$bt_l2cap(r2, &(0x7f0000000000)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x11}, 0x0, 0x1}, 0xe) getsockopt$bt_l2cap_L2CAP_OPTIONS(r2, 0x6, 0x1, 0x0, &(0x7f0000000400)) socket$inet6_udp(0xa, 0x2, 0x0) (async) r4 = socket$inet6_udp(0xa, 0x2, 0x0) connect$pppl2tp(r1, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r4, {0x2, 0x0, @dev}, 0x2}}, 0x2e) ioctl$XFS_IOC_START_COMMIT(r1, 0x80585882, &(0x7f0000000080)) (async) ioctl$XFS_IOC_START_COMMIT(r1, 0x80585882, &(0x7f0000000080)={0xffffffffffffffff}) setsockopt$pppl2tp_PPPOL2TP_SO_DEBUG(r5, 0x111, 0x1, 0x6, 0x4) socket$pppl2tp(0x18, 0x1, 0x1) program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session testing program (duration=31.36350786s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-socket$nl_route-recvmsg-setsockopt$netlink_NETLINK_ADD_MEMBERSHIP-mount$9p_fd-sendmsg$nl_route-socket$pppl2tp-syz_init_net_socket$bt_l2cap-syz_init_net_socket$bt_l2cap-madvise-pipe2-vmsplice-madvise-bind$bt_l2cap-bind$bt_l2cap-getsockopt$bt_l2cap_L2CAP_OPTIONS-socket$inet6_udp-socket$inet6_udp-connect$pppl2tp-ioctl$XFS_IOC_START_COMMIT-ioctl$XFS_IOC_START_COMMIT-setsockopt$pppl2tp_PPPOL2TP_SO_DEBUG detailed listing: executing program 0: socket$nl_route(0x10, 0x3, 0x0) (async) r0 = socket$nl_route(0x10, 0x3, 0x0) recvmsg(r0, &(0x7f00000006c0)={&(0x7f00000001c0)=@l2tp6={0xa, 0x0, 0x0, @private0}, 0x80, &(0x7f0000000580)=[{&(0x7f00000002c0)=""/142, 0x8e}, {&(0x7f0000000440)=""/110, 0x6e}, {&(0x7f00000004c0)=""/58, 0x3a}, {&(0x7f0000000500)=""/68, 0x44}], 0x4, &(0x7f00000005c0)=""/240, 0xf0}, 0x40012022) setsockopt$netlink_NETLINK_ADD_MEMBERSHIP(r0, 0x10e, 0xc, &(0x7f0000000000)=0x201, 0x4) mount$9p_fd(0x0, &(0x7f0000000180)='.\x00', &(0x7f0000000040), 0x0, &(0x7f00000003c0)=ANY=[@ANYBLOB='trans=fd,rfdno=', @ANYRESHEX]) sendmsg$nl_route(r0, &(0x7f0000000280)={0x0, 0x0, &(0x7f0000000040)={&(0x7f00000010c0)=ANY=[@ANYBLOB="440000004a00030000210000000000000a"], 0x44}, 0x1, 0x0, 0x0, 0x4}, 0x0) r1 = socket$pppl2tp(0x18, 0x1, 0x1) syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0) (async) r2 = syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0) madvise(&(0x7f0000000000/0x800000)=nil, 0x800000, 0xe) pipe2(&(0x7f0000000140)={0xffffffffffffffff, 0xffffffffffffffff}, 0x0) vmsplice(r3, &(0x7f0000e79000)=[{&(0x7f00003fb000)="f7", 0x7ffff000}], 0x1, 0x0) madvise(&(0x7f0000000000/0x600000)=nil, 0x600000, 0x14) bind$bt_l2cap(r2, &(0x7f0000000000)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x11}, 0x0, 0x1}, 0xe) (async) bind$bt_l2cap(r2, &(0x7f0000000000)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x11}, 0x0, 0x1}, 0xe) getsockopt$bt_l2cap_L2CAP_OPTIONS(r2, 0x6, 0x1, 0x0, &(0x7f0000000400)) socket$inet6_udp(0xa, 0x2, 0x0) (async) r4 = socket$inet6_udp(0xa, 0x2, 0x0) connect$pppl2tp(r1, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r4, {0x2, 0x0, @dev}, 0x2}}, 0x2e) ioctl$XFS_IOC_START_COMMIT(r1, 0x80585882, &(0x7f0000000080)) (async) ioctl$XFS_IOC_START_COMMIT(r1, 0x80585882, &(0x7f0000000080)={0xffffffffffffffff}) setsockopt$pppl2tp_PPPOL2TP_SO_DEBUG(r5, 0x111, 0x1, 0x6, 0x4) program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session testing program (duration=31.36350786s, {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}}): socket$nl_route-socket$nl_route-recvmsg-setsockopt$netlink_NETLINK_ADD_MEMBERSHIP-mount$9p_fd-sendmsg$nl_route-socket$pppl2tp-syz_init_net_socket$bt_l2cap-syz_init_net_socket$bt_l2cap-madvise-pipe2-vmsplice-madvise-bind$bt_l2cap-bind$bt_l2cap-getsockopt$bt_l2cap_L2CAP_OPTIONS-socket$inet6_udp-socket$inet6_udp-connect$pppl2tp-ioctl$XFS_IOC_START_COMMIT-ioctl$XFS_IOC_START_COMMIT detailed listing: executing program 0: socket$nl_route(0x10, 0x3, 0x0) (async) r0 = socket$nl_route(0x10, 0x3, 0x0) recvmsg(r0, &(0x7f00000006c0)={&(0x7f00000001c0)=@l2tp6={0xa, 0x0, 0x0, @private0}, 0x80, &(0x7f0000000580)=[{&(0x7f00000002c0)=""/142, 0x8e}, {&(0x7f0000000440)=""/110, 0x6e}, {&(0x7f00000004c0)=""/58, 0x3a}, {&(0x7f0000000500)=""/68, 0x44}], 0x4, &(0x7f00000005c0)=""/240, 0xf0}, 0x40012022) setsockopt$netlink_NETLINK_ADD_MEMBERSHIP(r0, 0x10e, 0xc, &(0x7f0000000000)=0x201, 0x4) mount$9p_fd(0x0, &(0x7f0000000180)='.\x00', &(0x7f0000000040), 0x0, &(0x7f00000003c0)=ANY=[@ANYBLOB='trans=fd,rfdno=', @ANYRESHEX]) sendmsg$nl_route(r0, &(0x7f0000000280)={0x0, 0x0, &(0x7f0000000040)={&(0x7f00000010c0)=ANY=[@ANYBLOB="440000004a00030000210000000000000a"], 0x44}, 0x1, 0x0, 0x0, 0x4}, 0x0) r1 = socket$pppl2tp(0x18, 0x1, 0x1) syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0) (async) r2 = syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0) madvise(&(0x7f0000000000/0x800000)=nil, 0x800000, 0xe) pipe2(&(0x7f0000000140)={0xffffffffffffffff, 0xffffffffffffffff}, 0x0) vmsplice(r3, &(0x7f0000e79000)=[{&(0x7f00003fb000)="f7", 0x7ffff000}], 0x1, 0x0) madvise(&(0x7f0000000000/0x600000)=nil, 0x600000, 0x14) bind$bt_l2cap(r2, &(0x7f0000000000)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x11}, 0x0, 0x1}, 0xe) (async) bind$bt_l2cap(r2, &(0x7f0000000000)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x11}, 0x0, 0x1}, 0xe) getsockopt$bt_l2cap_L2CAP_OPTIONS(r2, 0x6, 0x1, 0x0, &(0x7f0000000400)) socket$inet6_udp(0xa, 0x2, 0x0) (async) r4 = socket$inet6_udp(0xa, 0x2, 0x0) connect$pppl2tp(r1, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r4, {0x2, 0x0, @dev}, 0x2}}, 0x2e) ioctl$XFS_IOC_START_COMMIT(r1, 0x80585882, &(0x7f0000000080)) (async) ioctl$XFS_IOC_START_COMMIT(r1, 0x80585882, &(0x7f0000000080)) program crashed: KASAN: use-after-free Read in l2tp_tunnel_del_work testing program (duration=31.36350786s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-socket$nl_route-recvmsg-setsockopt$netlink_NETLINK_ADD_MEMBERSHIP-mount$9p_fd-sendmsg$nl_route-socket$pppl2tp-syz_init_net_socket$bt_l2cap-syz_init_net_socket$bt_l2cap-madvise-pipe2-vmsplice-madvise-bind$bt_l2cap-bind$bt_l2cap-getsockopt$bt_l2cap_L2CAP_OPTIONS-socket$inet6_udp-socket$inet6_udp-connect$pppl2tp-ioctl$XFS_IOC_START_COMMIT detailed listing: executing program 0: socket$nl_route(0x10, 0x3, 0x0) (async) r0 = socket$nl_route(0x10, 0x3, 0x0) recvmsg(r0, &(0x7f00000006c0)={&(0x7f00000001c0)=@l2tp6={0xa, 0x0, 0x0, @private0}, 0x80, &(0x7f0000000580)=[{&(0x7f00000002c0)=""/142, 0x8e}, {&(0x7f0000000440)=""/110, 0x6e}, {&(0x7f00000004c0)=""/58, 0x3a}, {&(0x7f0000000500)=""/68, 0x44}], 0x4, &(0x7f00000005c0)=""/240, 0xf0}, 0x40012022) setsockopt$netlink_NETLINK_ADD_MEMBERSHIP(r0, 0x10e, 0xc, &(0x7f0000000000)=0x201, 0x4) mount$9p_fd(0x0, &(0x7f0000000180)='.\x00', &(0x7f0000000040), 0x0, &(0x7f00000003c0)=ANY=[@ANYBLOB='trans=fd,rfdno=', @ANYRESHEX]) sendmsg$nl_route(r0, &(0x7f0000000280)={0x0, 0x0, &(0x7f0000000040)={&(0x7f00000010c0)=ANY=[@ANYBLOB="440000004a00030000210000000000000a"], 0x44}, 0x1, 0x0, 0x0, 0x4}, 0x0) r1 = socket$pppl2tp(0x18, 0x1, 0x1) syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0) (async) r2 = syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0) madvise(&(0x7f0000000000/0x800000)=nil, 0x800000, 0xe) pipe2(&(0x7f0000000140)={0xffffffffffffffff, 0xffffffffffffffff}, 0x0) vmsplice(r3, &(0x7f0000e79000)=[{&(0x7f00003fb000)="f7", 0x7ffff000}], 0x1, 0x0) madvise(&(0x7f0000000000/0x600000)=nil, 0x600000, 0x14) bind$bt_l2cap(r2, &(0x7f0000000000)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x11}, 0x0, 0x1}, 0xe) (async) bind$bt_l2cap(r2, &(0x7f0000000000)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x11}, 0x0, 0x1}, 0xe) getsockopt$bt_l2cap_L2CAP_OPTIONS(r2, 0x6, 0x1, 0x0, &(0x7f0000000400)) socket$inet6_udp(0xa, 0x2, 0x0) (async) r4 = socket$inet6_udp(0xa, 0x2, 0x0) connect$pppl2tp(r1, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r4, {0x2, 0x0, @dev}, 0x2}}, 0x2e) ioctl$XFS_IOC_START_COMMIT(r1, 0x80585882, &(0x7f0000000080)) (async) program crashed: KASAN: use-after-free Read in rcu_cblist_dequeue testing program (duration=31.36350786s, {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}}): socket$nl_route-socket$nl_route-recvmsg-setsockopt$netlink_NETLINK_ADD_MEMBERSHIP-mount$9p_fd-sendmsg$nl_route-socket$pppl2tp-syz_init_net_socket$bt_l2cap-syz_init_net_socket$bt_l2cap-madvise-pipe2-vmsplice-madvise-bind$bt_l2cap-bind$bt_l2cap-getsockopt$bt_l2cap_L2CAP_OPTIONS-socket$inet6_udp-socket$inet6_udp-connect$pppl2tp detailed listing: executing program 0: socket$nl_route(0x10, 0x3, 0x0) (async) r0 = socket$nl_route(0x10, 0x3, 0x0) recvmsg(r0, &(0x7f00000006c0)={&(0x7f00000001c0)=@l2tp6={0xa, 0x0, 0x0, @private0}, 0x80, &(0x7f0000000580)=[{&(0x7f00000002c0)=""/142, 0x8e}, {&(0x7f0000000440)=""/110, 0x6e}, {&(0x7f00000004c0)=""/58, 0x3a}, {&(0x7f0000000500)=""/68, 0x44}], 0x4, &(0x7f00000005c0)=""/240, 0xf0}, 0x40012022) setsockopt$netlink_NETLINK_ADD_MEMBERSHIP(r0, 0x10e, 0xc, &(0x7f0000000000)=0x201, 0x4) mount$9p_fd(0x0, &(0x7f0000000180)='.\x00', &(0x7f0000000040), 0x0, &(0x7f00000003c0)=ANY=[@ANYBLOB='trans=fd,rfdno=', @ANYRESHEX]) sendmsg$nl_route(r0, &(0x7f0000000280)={0x0, 0x0, &(0x7f0000000040)={&(0x7f00000010c0)=ANY=[@ANYBLOB="440000004a00030000210000000000000a"], 0x44}, 0x1, 0x0, 0x0, 0x4}, 0x0) r1 = socket$pppl2tp(0x18, 0x1, 0x1) syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0) (async) r2 = syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0) madvise(&(0x7f0000000000/0x800000)=nil, 0x800000, 0xe) pipe2(&(0x7f0000000140)={0xffffffffffffffff, 0xffffffffffffffff}, 0x0) vmsplice(r3, &(0x7f0000e79000)=[{&(0x7f00003fb000)="f7", 0x7ffff000}], 0x1, 0x0) madvise(&(0x7f0000000000/0x600000)=nil, 0x600000, 0x14) bind$bt_l2cap(r2, &(0x7f0000000000)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x11}, 0x0, 0x1}, 0xe) (async) bind$bt_l2cap(r2, &(0x7f0000000000)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x11}, 0x0, 0x1}, 0xe) getsockopt$bt_l2cap_L2CAP_OPTIONS(r2, 0x6, 0x1, 0x0, &(0x7f0000000400)) socket$inet6_udp(0xa, 0x2, 0x0) (async) r4 = socket$inet6_udp(0xa, 0x2, 0x0) connect$pppl2tp(r1, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r4, {0x2, 0x0, @dev}, 0x2}}, 0x2e) program did not crash testing program (duration=31.36350786s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-socket$nl_route-recvmsg-setsockopt$netlink_NETLINK_ADD_MEMBERSHIP-mount$9p_fd-sendmsg$nl_route-socket$pppl2tp-syz_init_net_socket$bt_l2cap-syz_init_net_socket$bt_l2cap-madvise-pipe2-vmsplice-madvise-bind$bt_l2cap-bind$bt_l2cap-getsockopt$bt_l2cap_L2CAP_OPTIONS-socket$inet6_udp-socket$inet6_udp-ioctl$XFS_IOC_START_COMMIT detailed listing: executing program 0: socket$nl_route(0x10, 0x3, 0x0) (async) r0 = socket$nl_route(0x10, 0x3, 0x0) recvmsg(r0, &(0x7f00000006c0)={&(0x7f00000001c0)=@l2tp6={0xa, 0x0, 0x0, @private0}, 0x80, &(0x7f0000000580)=[{&(0x7f00000002c0)=""/142, 0x8e}, {&(0x7f0000000440)=""/110, 0x6e}, {&(0x7f00000004c0)=""/58, 0x3a}, {&(0x7f0000000500)=""/68, 0x44}], 0x4, &(0x7f00000005c0)=""/240, 0xf0}, 0x40012022) setsockopt$netlink_NETLINK_ADD_MEMBERSHIP(r0, 0x10e, 0xc, &(0x7f0000000000)=0x201, 0x4) mount$9p_fd(0x0, &(0x7f0000000180)='.\x00', &(0x7f0000000040), 0x0, &(0x7f00000003c0)=ANY=[@ANYBLOB='trans=fd,rfdno=', @ANYRESHEX]) sendmsg$nl_route(r0, &(0x7f0000000280)={0x0, 0x0, &(0x7f0000000040)={&(0x7f00000010c0)=ANY=[@ANYBLOB="440000004a00030000210000000000000a"], 0x44}, 0x1, 0x0, 0x0, 0x4}, 0x0) r1 = socket$pppl2tp(0x18, 0x1, 0x1) syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0) (async) r2 = syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0) madvise(&(0x7f0000000000/0x800000)=nil, 0x800000, 0xe) pipe2(&(0x7f0000000140)={0xffffffffffffffff, 0xffffffffffffffff}, 0x0) vmsplice(r3, &(0x7f0000e79000)=[{&(0x7f00003fb000)="f7", 0x7ffff000}], 0x1, 0x0) madvise(&(0x7f0000000000/0x600000)=nil, 0x600000, 0x14) bind$bt_l2cap(r2, &(0x7f0000000000)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x11}, 0x0, 0x1}, 0xe) (async) bind$bt_l2cap(r2, &(0x7f0000000000)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x11}, 0x0, 0x1}, 0xe) getsockopt$bt_l2cap_L2CAP_OPTIONS(r2, 0x6, 0x1, 0x0, &(0x7f0000000400)) socket$inet6_udp(0xa, 0x2, 0x0) (async) socket$inet6_udp(0xa, 0x2, 0x0) ioctl$XFS_IOC_START_COMMIT(r1, 0x80585882, &(0x7f0000000080)) (async) program did not crash testing program (duration=31.36350786s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-socket$nl_route-recvmsg-setsockopt$netlink_NETLINK_ADD_MEMBERSHIP-mount$9p_fd-sendmsg$nl_route-socket$pppl2tp-syz_init_net_socket$bt_l2cap-syz_init_net_socket$bt_l2cap-madvise-pipe2-vmsplice-madvise-bind$bt_l2cap-bind$bt_l2cap-getsockopt$bt_l2cap_L2CAP_OPTIONS-socket$inet6_udp-connect$pppl2tp-ioctl$XFS_IOC_START_COMMIT detailed listing: executing program 0: socket$nl_route(0x10, 0x3, 0x0) (async) r0 = socket$nl_route(0x10, 0x3, 0x0) recvmsg(r0, &(0x7f00000006c0)={&(0x7f00000001c0)=@l2tp6={0xa, 0x0, 0x0, @private0}, 0x80, &(0x7f0000000580)=[{&(0x7f00000002c0)=""/142, 0x8e}, {&(0x7f0000000440)=""/110, 0x6e}, {&(0x7f00000004c0)=""/58, 0x3a}, {&(0x7f0000000500)=""/68, 0x44}], 0x4, &(0x7f00000005c0)=""/240, 0xf0}, 0x40012022) setsockopt$netlink_NETLINK_ADD_MEMBERSHIP(r0, 0x10e, 0xc, &(0x7f0000000000)=0x201, 0x4) mount$9p_fd(0x0, &(0x7f0000000180)='.\x00', &(0x7f0000000040), 0x0, &(0x7f00000003c0)=ANY=[@ANYBLOB='trans=fd,rfdno=', @ANYRESHEX]) sendmsg$nl_route(r0, &(0x7f0000000280)={0x0, 0x0, &(0x7f0000000040)={&(0x7f00000010c0)=ANY=[@ANYBLOB="440000004a00030000210000000000000a"], 0x44}, 0x1, 0x0, 0x0, 0x4}, 0x0) r1 = socket$pppl2tp(0x18, 0x1, 0x1) syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0) (async) r2 = syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0) madvise(&(0x7f0000000000/0x800000)=nil, 0x800000, 0xe) pipe2(&(0x7f0000000140)={0xffffffffffffffff, 0xffffffffffffffff}, 0x0) vmsplice(r3, &(0x7f0000e79000)=[{&(0x7f00003fb000)="f7", 0x7ffff000}], 0x1, 0x0) madvise(&(0x7f0000000000/0x600000)=nil, 0x600000, 0x14) bind$bt_l2cap(r2, &(0x7f0000000000)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x11}, 0x0, 0x1}, 0xe) (async) bind$bt_l2cap(r2, &(0x7f0000000000)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x11}, 0x0, 0x1}, 0xe) getsockopt$bt_l2cap_L2CAP_OPTIONS(r2, 0x6, 0x1, 0x0, &(0x7f0000000400)) socket$inet6_udp(0xa, 0x2, 0x0) (async) connect$pppl2tp(r1, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, 0xffffffffffffffff, {0x2, 0x0, @dev}, 0x2}}, 0x2e) ioctl$XFS_IOC_START_COMMIT(r1, 0x80585882, &(0x7f0000000080)) (async) program did not crash testing program (duration=31.36350786s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-socket$nl_route-recvmsg-setsockopt$netlink_NETLINK_ADD_MEMBERSHIP-mount$9p_fd-sendmsg$nl_route-socket$pppl2tp-syz_init_net_socket$bt_l2cap-syz_init_net_socket$bt_l2cap-madvise-pipe2-vmsplice-madvise-bind$bt_l2cap-bind$bt_l2cap-getsockopt$bt_l2cap_L2CAP_OPTIONS-socket$inet6_udp-connect$pppl2tp-ioctl$XFS_IOC_START_COMMIT detailed listing: executing program 0: socket$nl_route(0x10, 0x3, 0x0) (async) r0 = socket$nl_route(0x10, 0x3, 0x0) recvmsg(r0, &(0x7f00000006c0)={&(0x7f00000001c0)=@l2tp6={0xa, 0x0, 0x0, @private0}, 0x80, &(0x7f0000000580)=[{&(0x7f00000002c0)=""/142, 0x8e}, {&(0x7f0000000440)=""/110, 0x6e}, {&(0x7f00000004c0)=""/58, 0x3a}, {&(0x7f0000000500)=""/68, 0x44}], 0x4, &(0x7f00000005c0)=""/240, 0xf0}, 0x40012022) setsockopt$netlink_NETLINK_ADD_MEMBERSHIP(r0, 0x10e, 0xc, &(0x7f0000000000)=0x201, 0x4) mount$9p_fd(0x0, &(0x7f0000000180)='.\x00', &(0x7f0000000040), 0x0, &(0x7f00000003c0)=ANY=[@ANYBLOB='trans=fd,rfdno=', @ANYRESHEX]) sendmsg$nl_route(r0, &(0x7f0000000280)={0x0, 0x0, &(0x7f0000000040)={&(0x7f00000010c0)=ANY=[@ANYBLOB="440000004a00030000210000000000000a"], 0x44}, 0x1, 0x0, 0x0, 0x4}, 0x0) r1 = socket$pppl2tp(0x18, 0x1, 0x1) syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0) (async) r2 = syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0) madvise(&(0x7f0000000000/0x800000)=nil, 0x800000, 0xe) pipe2(&(0x7f0000000140)={0xffffffffffffffff, 0xffffffffffffffff}, 0x0) vmsplice(r3, &(0x7f0000e79000)=[{&(0x7f00003fb000)="f7", 0x7ffff000}], 0x1, 0x0) madvise(&(0x7f0000000000/0x600000)=nil, 0x600000, 0x14) bind$bt_l2cap(r2, &(0x7f0000000000)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x11}, 0x0, 0x1}, 0xe) (async) bind$bt_l2cap(r2, &(0x7f0000000000)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x11}, 0x0, 0x1}, 0xe) getsockopt$bt_l2cap_L2CAP_OPTIONS(r2, 0x6, 0x1, 0x0, &(0x7f0000000400)) r4 = socket$inet6_udp(0xa, 0x2, 0x0) connect$pppl2tp(r1, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r4, {0x2, 0x0, @dev}, 0x2}}, 0x2e) ioctl$XFS_IOC_START_COMMIT(r1, 0x80585882, &(0x7f0000000080)) (async) program crashed: KASAN: use-after-free Write in pppol2tp_release testing program (duration=31.36350786s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-socket$nl_route-recvmsg-setsockopt$netlink_NETLINK_ADD_MEMBERSHIP-mount$9p_fd-sendmsg$nl_route-socket$pppl2tp-syz_init_net_socket$bt_l2cap-syz_init_net_socket$bt_l2cap-madvise-pipe2-vmsplice-madvise-bind$bt_l2cap-bind$bt_l2cap-socket$inet6_udp-connect$pppl2tp-ioctl$XFS_IOC_START_COMMIT detailed listing: executing program 0: socket$nl_route(0x10, 0x3, 0x0) (async) r0 = socket$nl_route(0x10, 0x3, 0x0) recvmsg(r0, &(0x7f00000006c0)={&(0x7f00000001c0)=@l2tp6={0xa, 0x0, 0x0, @private0}, 0x80, &(0x7f0000000580)=[{&(0x7f00000002c0)=""/142, 0x8e}, {&(0x7f0000000440)=""/110, 0x6e}, {&(0x7f00000004c0)=""/58, 0x3a}, {&(0x7f0000000500)=""/68, 0x44}], 0x4, &(0x7f00000005c0)=""/240, 0xf0}, 0x40012022) setsockopt$netlink_NETLINK_ADD_MEMBERSHIP(r0, 0x10e, 0xc, &(0x7f0000000000)=0x201, 0x4) mount$9p_fd(0x0, &(0x7f0000000180)='.\x00', &(0x7f0000000040), 0x0, &(0x7f00000003c0)=ANY=[@ANYBLOB='trans=fd,rfdno=', @ANYRESHEX]) sendmsg$nl_route(r0, &(0x7f0000000280)={0x0, 0x0, &(0x7f0000000040)={&(0x7f00000010c0)=ANY=[@ANYBLOB="440000004a00030000210000000000000a"], 0x44}, 0x1, 0x0, 0x0, 0x4}, 0x0) r1 = socket$pppl2tp(0x18, 0x1, 0x1) syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0) (async) r2 = syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0) madvise(&(0x7f0000000000/0x800000)=nil, 0x800000, 0xe) pipe2(&(0x7f0000000140)={0xffffffffffffffff, 0xffffffffffffffff}, 0x0) vmsplice(r3, &(0x7f0000e79000)=[{&(0x7f00003fb000)="f7", 0x7ffff000}], 0x1, 0x0) madvise(&(0x7f0000000000/0x600000)=nil, 0x600000, 0x14) bind$bt_l2cap(r2, &(0x7f0000000000)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x11}, 0x0, 0x1}, 0xe) (async) bind$bt_l2cap(r2, &(0x7f0000000000)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x11}, 0x0, 0x1}, 0xe) r4 = socket$inet6_udp(0xa, 0x2, 0x0) connect$pppl2tp(r1, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r4, {0x2, 0x0, @dev}, 0x2}}, 0x2e) ioctl$XFS_IOC_START_COMMIT(r1, 0x80585882, &(0x7f0000000080)) (async) program crashed: KASAN: use-after-free Write in pppol2tp_release testing program (duration=31.36350786s, {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}}): socket$nl_route-socket$nl_route-recvmsg-setsockopt$netlink_NETLINK_ADD_MEMBERSHIP-mount$9p_fd-sendmsg$nl_route-socket$pppl2tp-syz_init_net_socket$bt_l2cap-syz_init_net_socket$bt_l2cap-madvise-pipe2-vmsplice-madvise-bind$bt_l2cap-socket$inet6_udp-connect$pppl2tp-ioctl$XFS_IOC_START_COMMIT detailed listing: executing program 0: socket$nl_route(0x10, 0x3, 0x0) (async) r0 = socket$nl_route(0x10, 0x3, 0x0) recvmsg(r0, &(0x7f00000006c0)={&(0x7f00000001c0)=@l2tp6={0xa, 0x0, 0x0, @private0}, 0x80, &(0x7f0000000580)=[{&(0x7f00000002c0)=""/142, 0x8e}, {&(0x7f0000000440)=""/110, 0x6e}, {&(0x7f00000004c0)=""/58, 0x3a}, {&(0x7f0000000500)=""/68, 0x44}], 0x4, &(0x7f00000005c0)=""/240, 0xf0}, 0x40012022) setsockopt$netlink_NETLINK_ADD_MEMBERSHIP(r0, 0x10e, 0xc, &(0x7f0000000000)=0x201, 0x4) mount$9p_fd(0x0, &(0x7f0000000180)='.\x00', &(0x7f0000000040), 0x0, &(0x7f00000003c0)=ANY=[@ANYBLOB='trans=fd,rfdno=', @ANYRESHEX]) sendmsg$nl_route(r0, &(0x7f0000000280)={0x0, 0x0, &(0x7f0000000040)={&(0x7f00000010c0)=ANY=[@ANYBLOB="440000004a00030000210000000000000a"], 0x44}, 0x1, 0x0, 0x0, 0x4}, 0x0) r1 = socket$pppl2tp(0x18, 0x1, 0x1) syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0) (async) r2 = syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0) madvise(&(0x7f0000000000/0x800000)=nil, 0x800000, 0xe) pipe2(&(0x7f0000000140)={0xffffffffffffffff, 0xffffffffffffffff}, 0x0) vmsplice(r3, &(0x7f0000e79000)=[{&(0x7f00003fb000)="f7", 0x7ffff000}], 0x1, 0x0) madvise(&(0x7f0000000000/0x600000)=nil, 0x600000, 0x14) bind$bt_l2cap(r2, &(0x7f0000000000)={0x1f, 0x0, @fixed={'\xaa\xaa\xaa\xaa\xaa', 0x11}, 0x0, 0x1}, 0xe) (async) r4 = socket$inet6_udp(0xa, 0x2, 0x0) connect$pppl2tp(r1, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r4, {0x2, 0x0, @dev}, 0x2}}, 0x2e) ioctl$XFS_IOC_START_COMMIT(r1, 0x80585882, &(0x7f0000000080)) (async) program crashed: KASAN: use-after-free Write in pppol2tp_release testing program (duration=31.36350786s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-socket$nl_route-recvmsg-setsockopt$netlink_NETLINK_ADD_MEMBERSHIP-mount$9p_fd-sendmsg$nl_route-socket$pppl2tp-syz_init_net_socket$bt_l2cap-syz_init_net_socket$bt_l2cap-madvise-pipe2-vmsplice-madvise-socket$inet6_udp-connect$pppl2tp-ioctl$XFS_IOC_START_COMMIT detailed listing: executing program 0: socket$nl_route(0x10, 0x3, 0x0) (async) r0 = socket$nl_route(0x10, 0x3, 0x0) recvmsg(r0, &(0x7f00000006c0)={&(0x7f00000001c0)=@l2tp6={0xa, 0x0, 0x0, @private0}, 0x80, &(0x7f0000000580)=[{&(0x7f00000002c0)=""/142, 0x8e}, {&(0x7f0000000440)=""/110, 0x6e}, {&(0x7f00000004c0)=""/58, 0x3a}, {&(0x7f0000000500)=""/68, 0x44}], 0x4, &(0x7f00000005c0)=""/240, 0xf0}, 0x40012022) setsockopt$netlink_NETLINK_ADD_MEMBERSHIP(r0, 0x10e, 0xc, &(0x7f0000000000)=0x201, 0x4) mount$9p_fd(0x0, &(0x7f0000000180)='.\x00', &(0x7f0000000040), 0x0, &(0x7f00000003c0)=ANY=[@ANYBLOB='trans=fd,rfdno=', @ANYRESHEX]) sendmsg$nl_route(r0, &(0x7f0000000280)={0x0, 0x0, &(0x7f0000000040)={&(0x7f00000010c0)=ANY=[@ANYBLOB="440000004a00030000210000000000000a"], 0x44}, 0x1, 0x0, 0x0, 0x4}, 0x0) r1 = socket$pppl2tp(0x18, 0x1, 0x1) syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0) (async) syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0) madvise(&(0x7f0000000000/0x800000)=nil, 0x800000, 0xe) pipe2(&(0x7f0000000140)={0xffffffffffffffff, 0xffffffffffffffff}, 0x0) vmsplice(r2, &(0x7f0000e79000)=[{&(0x7f00003fb000)="f7", 0x7ffff000}], 0x1, 0x0) madvise(&(0x7f0000000000/0x600000)=nil, 0x600000, 0x14) r3 = socket$inet6_udp(0xa, 0x2, 0x0) connect$pppl2tp(r1, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r3, {0x2, 0x0, @dev}, 0x2}}, 0x2e) ioctl$XFS_IOC_START_COMMIT(r1, 0x80585882, &(0x7f0000000080)) (async) program crashed: KASAN: use-after-free Write in pppol2tp_release testing program (duration=31.36350786s, {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}}): socket$nl_route-socket$nl_route-recvmsg-setsockopt$netlink_NETLINK_ADD_MEMBERSHIP-mount$9p_fd-sendmsg$nl_route-socket$pppl2tp-syz_init_net_socket$bt_l2cap-syz_init_net_socket$bt_l2cap-madvise-pipe2-vmsplice-socket$inet6_udp-connect$pppl2tp-ioctl$XFS_IOC_START_COMMIT detailed listing: executing program 0: socket$nl_route(0x10, 0x3, 0x0) (async) r0 = socket$nl_route(0x10, 0x3, 0x0) recvmsg(r0, &(0x7f00000006c0)={&(0x7f00000001c0)=@l2tp6={0xa, 0x0, 0x0, @private0}, 0x80, &(0x7f0000000580)=[{&(0x7f00000002c0)=""/142, 0x8e}, {&(0x7f0000000440)=""/110, 0x6e}, {&(0x7f00000004c0)=""/58, 0x3a}, {&(0x7f0000000500)=""/68, 0x44}], 0x4, &(0x7f00000005c0)=""/240, 0xf0}, 0x40012022) setsockopt$netlink_NETLINK_ADD_MEMBERSHIP(r0, 0x10e, 0xc, &(0x7f0000000000)=0x201, 0x4) mount$9p_fd(0x0, &(0x7f0000000180)='.\x00', &(0x7f0000000040), 0x0, &(0x7f00000003c0)=ANY=[@ANYBLOB='trans=fd,rfdno=', @ANYRESHEX]) sendmsg$nl_route(r0, &(0x7f0000000280)={0x0, 0x0, &(0x7f0000000040)={&(0x7f00000010c0)=ANY=[@ANYBLOB="440000004a00030000210000000000000a"], 0x44}, 0x1, 0x0, 0x0, 0x4}, 0x0) r1 = socket$pppl2tp(0x18, 0x1, 0x1) syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0) (async) syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0) madvise(&(0x7f0000000000/0x800000)=nil, 0x800000, 0xe) pipe2(&(0x7f0000000140)={0xffffffffffffffff, 0xffffffffffffffff}, 0x0) vmsplice(r2, &(0x7f0000e79000)=[{&(0x7f00003fb000)="f7", 0x7ffff000}], 0x1, 0x0) r3 = socket$inet6_udp(0xa, 0x2, 0x0) connect$pppl2tp(r1, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r3, {0x2, 0x0, @dev}, 0x2}}, 0x2e) ioctl$XFS_IOC_START_COMMIT(r1, 0x80585882, &(0x7f0000000080)) (async) program crashed: KASAN: use-after-free Write in pppol2tp_release testing program (duration=31.36350786s, {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}}): socket$nl_route-socket$nl_route-recvmsg-setsockopt$netlink_NETLINK_ADD_MEMBERSHIP-mount$9p_fd-sendmsg$nl_route-socket$pppl2tp-syz_init_net_socket$bt_l2cap-syz_init_net_socket$bt_l2cap-madvise-pipe2-socket$inet6_udp-connect$pppl2tp-ioctl$XFS_IOC_START_COMMIT detailed listing: executing program 0: socket$nl_route(0x10, 0x3, 0x0) (async) r0 = socket$nl_route(0x10, 0x3, 0x0) recvmsg(r0, &(0x7f00000006c0)={&(0x7f00000001c0)=@l2tp6={0xa, 0x0, 0x0, @private0}, 0x80, &(0x7f0000000580)=[{&(0x7f00000002c0)=""/142, 0x8e}, {&(0x7f0000000440)=""/110, 0x6e}, {&(0x7f00000004c0)=""/58, 0x3a}, {&(0x7f0000000500)=""/68, 0x44}], 0x4, &(0x7f00000005c0)=""/240, 0xf0}, 0x40012022) setsockopt$netlink_NETLINK_ADD_MEMBERSHIP(r0, 0x10e, 0xc, &(0x7f0000000000)=0x201, 0x4) mount$9p_fd(0x0, &(0x7f0000000180)='.\x00', &(0x7f0000000040), 0x0, &(0x7f00000003c0)=ANY=[@ANYBLOB='trans=fd,rfdno=', @ANYRESHEX]) sendmsg$nl_route(r0, &(0x7f0000000280)={0x0, 0x0, &(0x7f0000000040)={&(0x7f00000010c0)=ANY=[@ANYBLOB="440000004a00030000210000000000000a"], 0x44}, 0x1, 0x0, 0x0, 0x4}, 0x0) r1 = socket$pppl2tp(0x18, 0x1, 0x1) syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0) (async) syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0) madvise(&(0x7f0000000000/0x800000)=nil, 0x800000, 0xe) pipe2(&(0x7f0000000140), 0x0) r2 = socket$inet6_udp(0xa, 0x2, 0x0) connect$pppl2tp(r1, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r2, {0x2, 0x0, @dev}, 0x2}}, 0x2e) ioctl$XFS_IOC_START_COMMIT(r1, 0x80585882, &(0x7f0000000080)) (async) program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session testing program (duration=31.36350786s, {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}}): socket$nl_route-socket$nl_route-recvmsg-setsockopt$netlink_NETLINK_ADD_MEMBERSHIP-mount$9p_fd-sendmsg$nl_route-socket$pppl2tp-syz_init_net_socket$bt_l2cap-syz_init_net_socket$bt_l2cap-madvise-socket$inet6_udp-connect$pppl2tp-ioctl$XFS_IOC_START_COMMIT detailed listing: executing program 0: socket$nl_route(0x10, 0x3, 0x0) (async) r0 = socket$nl_route(0x10, 0x3, 0x0) recvmsg(r0, &(0x7f00000006c0)={&(0x7f00000001c0)=@l2tp6={0xa, 0x0, 0x0, @private0}, 0x80, &(0x7f0000000580)=[{&(0x7f00000002c0)=""/142, 0x8e}, {&(0x7f0000000440)=""/110, 0x6e}, {&(0x7f00000004c0)=""/58, 0x3a}, {&(0x7f0000000500)=""/68, 0x44}], 0x4, &(0x7f00000005c0)=""/240, 0xf0}, 0x40012022) setsockopt$netlink_NETLINK_ADD_MEMBERSHIP(r0, 0x10e, 0xc, &(0x7f0000000000)=0x201, 0x4) mount$9p_fd(0x0, &(0x7f0000000180)='.\x00', &(0x7f0000000040), 0x0, &(0x7f00000003c0)=ANY=[@ANYBLOB='trans=fd,rfdno=', @ANYRESHEX]) sendmsg$nl_route(r0, &(0x7f0000000280)={0x0, 0x0, &(0x7f0000000040)={&(0x7f00000010c0)=ANY=[@ANYBLOB="440000004a00030000210000000000000a"], 0x44}, 0x1, 0x0, 0x0, 0x4}, 0x0) r1 = socket$pppl2tp(0x18, 0x1, 0x1) syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0) (async) syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0) madvise(&(0x7f0000000000/0x800000)=nil, 0x800000, 0xe) r2 = socket$inet6_udp(0xa, 0x2, 0x0) connect$pppl2tp(r1, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r2, {0x2, 0x0, @dev}, 0x2}}, 0x2e) ioctl$XFS_IOC_START_COMMIT(r1, 0x80585882, &(0x7f0000000080)) (async) program crashed: KASAN: use-after-free Write in pppol2tp_release testing program (duration=31.36350786s, {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}}): socket$nl_route-socket$nl_route-recvmsg-setsockopt$netlink_NETLINK_ADD_MEMBERSHIP-mount$9p_fd-sendmsg$nl_route-socket$pppl2tp-syz_init_net_socket$bt_l2cap-syz_init_net_socket$bt_l2cap-socket$inet6_udp-connect$pppl2tp-ioctl$XFS_IOC_START_COMMIT detailed listing: executing program 0: socket$nl_route(0x10, 0x3, 0x0) (async) r0 = socket$nl_route(0x10, 0x3, 0x0) recvmsg(r0, &(0x7f00000006c0)={&(0x7f00000001c0)=@l2tp6={0xa, 0x0, 0x0, @private0}, 0x80, &(0x7f0000000580)=[{&(0x7f00000002c0)=""/142, 0x8e}, {&(0x7f0000000440)=""/110, 0x6e}, {&(0x7f00000004c0)=""/58, 0x3a}, {&(0x7f0000000500)=""/68, 0x44}], 0x4, &(0x7f00000005c0)=""/240, 0xf0}, 0x40012022) setsockopt$netlink_NETLINK_ADD_MEMBERSHIP(r0, 0x10e, 0xc, &(0x7f0000000000)=0x201, 0x4) mount$9p_fd(0x0, &(0x7f0000000180)='.\x00', &(0x7f0000000040), 0x0, &(0x7f00000003c0)=ANY=[@ANYBLOB='trans=fd,rfdno=', @ANYRESHEX]) sendmsg$nl_route(r0, &(0x7f0000000280)={0x0, 0x0, &(0x7f0000000040)={&(0x7f00000010c0)=ANY=[@ANYBLOB="440000004a00030000210000000000000a"], 0x44}, 0x1, 0x0, 0x0, 0x4}, 0x0) r1 = socket$pppl2tp(0x18, 0x1, 0x1) syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0) (async) syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0) r2 = socket$inet6_udp(0xa, 0x2, 0x0) connect$pppl2tp(r1, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r2, {0x2, 0x0, @dev}, 0x2}}, 0x2e) ioctl$XFS_IOC_START_COMMIT(r1, 0x80585882, &(0x7f0000000080)) (async) program crashed: KASAN: use-after-free Write in pppol2tp_release testing program (duration=31.36350786s, {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}}): socket$nl_route-socket$nl_route-recvmsg-setsockopt$netlink_NETLINK_ADD_MEMBERSHIP-mount$9p_fd-sendmsg$nl_route-socket$pppl2tp-syz_init_net_socket$bt_l2cap-socket$inet6_udp-connect$pppl2tp-ioctl$XFS_IOC_START_COMMIT detailed listing: executing program 0: socket$nl_route(0x10, 0x3, 0x0) (async) r0 = socket$nl_route(0x10, 0x3, 0x0) recvmsg(r0, &(0x7f00000006c0)={&(0x7f00000001c0)=@l2tp6={0xa, 0x0, 0x0, @private0}, 0x80, &(0x7f0000000580)=[{&(0x7f00000002c0)=""/142, 0x8e}, {&(0x7f0000000440)=""/110, 0x6e}, {&(0x7f00000004c0)=""/58, 0x3a}, {&(0x7f0000000500)=""/68, 0x44}], 0x4, &(0x7f00000005c0)=""/240, 0xf0}, 0x40012022) setsockopt$netlink_NETLINK_ADD_MEMBERSHIP(r0, 0x10e, 0xc, &(0x7f0000000000)=0x201, 0x4) mount$9p_fd(0x0, &(0x7f0000000180)='.\x00', &(0x7f0000000040), 0x0, &(0x7f00000003c0)=ANY=[@ANYBLOB='trans=fd,rfdno=', @ANYRESHEX]) sendmsg$nl_route(r0, &(0x7f0000000280)={0x0, 0x0, &(0x7f0000000040)={&(0x7f00000010c0)=ANY=[@ANYBLOB="440000004a00030000210000000000000a"], 0x44}, 0x1, 0x0, 0x0, 0x4}, 0x0) r1 = socket$pppl2tp(0x18, 0x1, 0x1) syz_init_net_socket$bt_l2cap(0x1f, 0x5, 0x0) (async) r2 = socket$inet6_udp(0xa, 0x2, 0x0) connect$pppl2tp(r1, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r2, {0x2, 0x0, @dev}, 0x2}}, 0x2e) ioctl$XFS_IOC_START_COMMIT(r1, 0x80585882, &(0x7f0000000080)) (async) program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session testing program (duration=31.36350786s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-socket$nl_route-recvmsg-setsockopt$netlink_NETLINK_ADD_MEMBERSHIP-mount$9p_fd-sendmsg$nl_route-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$XFS_IOC_START_COMMIT detailed listing: executing program 0: socket$nl_route(0x10, 0x3, 0x0) (async) r0 = socket$nl_route(0x10, 0x3, 0x0) recvmsg(r0, &(0x7f00000006c0)={&(0x7f00000001c0)=@l2tp6={0xa, 0x0, 0x0, @private0}, 0x80, &(0x7f0000000580)=[{&(0x7f00000002c0)=""/142, 0x8e}, {&(0x7f0000000440)=""/110, 0x6e}, {&(0x7f00000004c0)=""/58, 0x3a}, {&(0x7f0000000500)=""/68, 0x44}], 0x4, &(0x7f00000005c0)=""/240, 0xf0}, 0x40012022) setsockopt$netlink_NETLINK_ADD_MEMBERSHIP(r0, 0x10e, 0xc, &(0x7f0000000000)=0x201, 0x4) mount$9p_fd(0x0, &(0x7f0000000180)='.\x00', &(0x7f0000000040), 0x0, &(0x7f00000003c0)=ANY=[@ANYBLOB='trans=fd,rfdno=', @ANYRESHEX]) sendmsg$nl_route(r0, &(0x7f0000000280)={0x0, 0x0, &(0x7f0000000040)={&(0x7f00000010c0)=ANY=[@ANYBLOB="440000004a00030000210000000000000a"], 0x44}, 0x1, 0x0, 0x0, 0x4}, 0x0) r1 = socket$pppl2tp(0x18, 0x1, 0x1) r2 = socket$inet6_udp(0xa, 0x2, 0x0) connect$pppl2tp(r1, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r2, {0x2, 0x0, @dev}, 0x2}}, 0x2e) ioctl$XFS_IOC_START_COMMIT(r1, 0x80585882, &(0x7f0000000080)) (async) program crashed: KASAN: use-after-free Write in pppol2tp_release testing program (duration=31.36350786s, {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}}): socket$nl_route-socket$nl_route-recvmsg-setsockopt$netlink_NETLINK_ADD_MEMBERSHIP-mount$9p_fd-sendmsg$nl_route-socket$inet6_udp-connect$pppl2tp-ioctl$XFS_IOC_START_COMMIT detailed listing: executing program 0: socket$nl_route(0x10, 0x3, 0x0) (async) r0 = socket$nl_route(0x10, 0x3, 0x0) recvmsg(r0, &(0x7f00000006c0)={&(0x7f00000001c0)=@l2tp6={0xa, 0x0, 0x0, @private0}, 0x80, &(0x7f0000000580)=[{&(0x7f00000002c0)=""/142, 0x8e}, {&(0x7f0000000440)=""/110, 0x6e}, {&(0x7f00000004c0)=""/58, 0x3a}, {&(0x7f0000000500)=""/68, 0x44}], 0x4, &(0x7f00000005c0)=""/240, 0xf0}, 0x40012022) setsockopt$netlink_NETLINK_ADD_MEMBERSHIP(r0, 0x10e, 0xc, &(0x7f0000000000)=0x201, 0x4) mount$9p_fd(0x0, &(0x7f0000000180)='.\x00', &(0x7f0000000040), 0x0, &(0x7f00000003c0)=ANY=[@ANYBLOB='trans=fd,rfdno=', @ANYRESHEX]) sendmsg$nl_route(r0, &(0x7f0000000280)={0x0, 0x0, &(0x7f0000000040)={&(0x7f00000010c0)=ANY=[@ANYBLOB="440000004a00030000210000000000000a"], 0x44}, 0x1, 0x0, 0x0, 0x4}, 0x0) r1 = socket$inet6_udp(0xa, 0x2, 0x0) connect$pppl2tp(0xffffffffffffffff, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e) ioctl$XFS_IOC_START_COMMIT(0xffffffffffffffff, 0x80585882, &(0x7f0000000080)) (async) program did not crash testing program (duration=31.36350786s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-socket$nl_route-recvmsg-setsockopt$netlink_NETLINK_ADD_MEMBERSHIP-mount$9p_fd-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$XFS_IOC_START_COMMIT detailed listing: executing program 0: socket$nl_route(0x10, 0x3, 0x0) (async) r0 = socket$nl_route(0x10, 0x3, 0x0) recvmsg(r0, &(0x7f00000006c0)={&(0x7f00000001c0)=@l2tp6={0xa, 0x0, 0x0, @private0}, 0x80, &(0x7f0000000580)=[{&(0x7f00000002c0)=""/142, 0x8e}, {&(0x7f0000000440)=""/110, 0x6e}, {&(0x7f00000004c0)=""/58, 0x3a}, {&(0x7f0000000500)=""/68, 0x44}], 0x4, &(0x7f00000005c0)=""/240, 0xf0}, 0x40012022) setsockopt$netlink_NETLINK_ADD_MEMBERSHIP(r0, 0x10e, 0xc, &(0x7f0000000000)=0x201, 0x4) mount$9p_fd(0x0, &(0x7f0000000180)='.\x00', &(0x7f0000000040), 0x0, &(0x7f00000003c0)=ANY=[@ANYBLOB='trans=fd,rfdno=', @ANYRESHEX]) r1 = socket$pppl2tp(0x18, 0x1, 0x1) r2 = socket$inet6_udp(0xa, 0x2, 0x0) connect$pppl2tp(r1, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r2, {0x2, 0x0, @dev}, 0x2}}, 0x2e) ioctl$XFS_IOC_START_COMMIT(r1, 0x80585882, &(0x7f0000000080)) (async) program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session testing program (duration=31.36350786s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-socket$nl_route-recvmsg-setsockopt$netlink_NETLINK_ADD_MEMBERSHIP-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$XFS_IOC_START_COMMIT detailed listing: executing program 0: socket$nl_route(0x10, 0x3, 0x0) (async) r0 = socket$nl_route(0x10, 0x3, 0x0) recvmsg(r0, &(0x7f00000006c0)={&(0x7f00000001c0)=@l2tp6={0xa, 0x0, 0x0, @private0}, 0x80, &(0x7f0000000580)=[{&(0x7f00000002c0)=""/142, 0x8e}, {&(0x7f0000000440)=""/110, 0x6e}, {&(0x7f00000004c0)=""/58, 0x3a}, {&(0x7f0000000500)=""/68, 0x44}], 0x4, &(0x7f00000005c0)=""/240, 0xf0}, 0x40012022) setsockopt$netlink_NETLINK_ADD_MEMBERSHIP(r0, 0x10e, 0xc, &(0x7f0000000000)=0x201, 0x4) r1 = socket$pppl2tp(0x18, 0x1, 0x1) r2 = socket$inet6_udp(0xa, 0x2, 0x0) connect$pppl2tp(r1, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r2, {0x2, 0x0, @dev}, 0x2}}, 0x2e) ioctl$XFS_IOC_START_COMMIT(r1, 0x80585882, &(0x7f0000000080)) (async) program crashed: KASAN: use-after-free Write in pppol2tp_release testing program (duration=31.36350786s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-socket$nl_route-recvmsg-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$XFS_IOC_START_COMMIT detailed listing: executing program 0: socket$nl_route(0x10, 0x3, 0x0) (async) r0 = socket$nl_route(0x10, 0x3, 0x0) recvmsg(r0, &(0x7f00000006c0)={&(0x7f00000001c0)=@l2tp6={0xa, 0x0, 0x0, @private0}, 0x80, &(0x7f0000000580)=[{&(0x7f00000002c0)=""/142, 0x8e}, {&(0x7f0000000440)=""/110, 0x6e}, {&(0x7f00000004c0)=""/58, 0x3a}, {&(0x7f0000000500)=""/68, 0x44}], 0x4, &(0x7f00000005c0)=""/240, 0xf0}, 0x40012022) r1 = socket$pppl2tp(0x18, 0x1, 0x1) r2 = socket$inet6_udp(0xa, 0x2, 0x0) connect$pppl2tp(r1, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r2, {0x2, 0x0, @dev}, 0x2}}, 0x2e) ioctl$XFS_IOC_START_COMMIT(r1, 0x80585882, &(0x7f0000000080)) (async) program crashed: KASAN: use-after-free Read in rcu_cblist_dequeue testing program (duration=31.36350786s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-socket$nl_route-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$XFS_IOC_START_COMMIT detailed listing: executing program 0: socket$nl_route(0x10, 0x3, 0x0) (async) socket$nl_route(0x10, 0x3, 0x0) r0 = socket$pppl2tp(0x18, 0x1, 0x1) r1 = socket$inet6_udp(0xa, 0x2, 0x0) connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e) ioctl$XFS_IOC_START_COMMIT(r0, 0x80585882, &(0x7f0000000080)) (async) program crashed: KASAN: use-after-free Write in pppol2tp_release testing program (duration=31.36350786s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$XFS_IOC_START_COMMIT detailed listing: executing program 0: socket$nl_route(0x10, 0x3, 0x0) (async) r0 = socket$pppl2tp(0x18, 0x1, 0x1) r1 = socket$inet6_udp(0xa, 0x2, 0x0) connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e) ioctl$XFS_IOC_START_COMMIT(r0, 0x80585882, &(0x7f0000000080)) (async) program crashed: KASAN: use-after-free Write in pppol2tp_release testing program (duration=31.36350786s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$XFS_IOC_START_COMMIT detailed listing: executing program 0: r0 = socket$pppl2tp(0x18, 0x1, 0x1) r1 = socket$inet6_udp(0xa, 0x2, 0x0) connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e) ioctl$XFS_IOC_START_COMMIT(r0, 0x80585882, &(0x7f0000000080)) (async) program crashed: KASAN: use-after-free Write in pppol2tp_release testing program (duration=31.36350786s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$XFS_IOC_START_COMMIT detailed listing: executing program 0: r0 = socket$pppl2tp(0x18, 0x1, 0x1) r1 = socket$inet6_udp(0xa, 0x2, 0x0) connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e) ioctl$XFS_IOC_START_COMMIT(r0, 0x80585882, &(0x7f0000000080)) program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session testing program (duration=31.36350786s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$XFS_IOC_START_COMMIT detailed listing: executing program 0: r0 = socket$pppl2tp(0x18, 0x1, 0x1) socket$inet6_udp(0xa, 0x2, 0x0) connect$pppl2tp(r0, 0x0, 0x0) ioctl$XFS_IOC_START_COMMIT(r0, 0x80585882, &(0x7f0000000080)) program did not crash testing program (duration=31.36350786s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$XFS_IOC_START_COMMIT detailed listing: executing program 0: r0 = socket$pppl2tp(0x18, 0x1, 0x1) r1 = socket$inet6_udp(0xa, 0x2, 0x0) connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e) ioctl$XFS_IOC_START_COMMIT(r0, 0x80585882, 0x0) program crashed: KASAN: use-after-free Write in pppol2tp_release extracting C reproducer testing compiled C program (duration=31.36350786s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$XFS_IOC_START_COMMIT program crashed: KASAN: use-after-free Write in pppol2tp_release simplifying C reproducer testing compiled C program (duration=31.36350786s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$XFS_IOC_START_COMMIT program crashed: KASAN: use-after-free Write in pppol2tp_release testing compiled C program (duration=31.36350786s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$XFS_IOC_START_COMMIT program crashed: KASAN: use-after-free Write in pppol2tp_release testing compiled C program (duration=31.36350786s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$XFS_IOC_START_COMMIT program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session testing compiled C program (duration=31.36350786s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$XFS_IOC_START_COMMIT program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session testing compiled C program (duration=31.36350786s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$XFS_IOC_START_COMMIT program did not crash testing compiled C program (duration=31.36350786s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$XFS_IOC_START_COMMIT program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session testing program (duration=31.36350786s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$XFS_IOC_START_COMMIT detailed listing: executing program 0: r0 = socket$pppl2tp(0x18, 0x1, 0x1) r1 = socket$inet6_udp(0xa, 0x2, 0x0) connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e) ioctl$XFS_IOC_START_COMMIT(r0, 0x80585882, 0x0) program crashed: KASAN: use-after-free Write in pppol2tp_release validation run: crashed=true testing program (duration=31.36350786s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$XFS_IOC_START_COMMIT detailed listing: executing program 0: r0 = socket$pppl2tp(0x18, 0x1, 0x1) r1 = socket$inet6_udp(0xa, 0x2, 0x0) connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e) ioctl$XFS_IOC_START_COMMIT(r0, 0x80585882, 0x0) program crashed: KASAN: use-after-free Write in pppol2tp_release validation run: crashed=true testing program (duration=31.36350786s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$pppl2tp-socket$inet6_udp-connect$pppl2tp-ioctl$XFS_IOC_START_COMMIT detailed listing: executing program 0: r0 = socket$pppl2tp(0x18, 0x1, 0x1) r1 = socket$inet6_udp(0xa, 0x2, 0x0) connect$pppl2tp(r0, &(0x7f0000000000)=@pppol2tpv3={0x18, 0x1, {0x3, r1, {0x2, 0x0, @dev}, 0x2}}, 0x2e) ioctl$XFS_IOC_START_COMMIT(r0, 0x80585882, 0x0) program crashed: KASAN: use-after-free Read in pppol2tp_sock_to_session validation run: crashed=true reproducing took 25m32.865441998s repro crashed as (corrupted=false): ================================================================== BUG: KASAN: use-after-free in pppol2tp_sock_to_session+0x1a0/0x1b0 net/l2tp/l2tp_ppp.c:156 Read of size 4 at addr ffff88812b781800 by task syz.2.17/373 CPU: 0 PID: 373 Comm: syz.2.17 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 Call Trace: __dump_stack+0x21/0x30 lib/dump_stack.c:88 dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:427 [inline] kasan_report+0x10f/0x150 mm/kasan/report.c:444 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report_generic.c:308 pppol2tp_sock_to_session+0x1a0/0x1b0 net/l2tp/l2tp_ppp.c:156 pppol2tp_release+0x150/0x2b0 net/l2tp/l2tp_ppp.c:435 __sock_release net/socket.c:649 [inline] sock_close+0xb8/0x200 net/socket.c:1335 __fput+0x22b/0x900 fs/file_table.c:311 ____fput+0x15/0x20 fs/file_table.c:339 task_work_run+0x127/0x190 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop+0xd0/0xe0 kernel/entry/common.c:181 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:214 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline] syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:307 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f160e24be59 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:00007ffc9172d2a8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007ffc9172d390 RCX: 00007f160e24be59 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 0000000000007079 R08: 0000000000000001 R09: 0000000000000000 R10: 0000001b32f20000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f160e4c4fac R14: 00007f160e4c4fa8 R15: 00007f160e4c4fa0 Allocated by task 373: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:433 [inline] ____kasan_kmalloc mm/kasan/common.c:512 [inline] __kasan_kmalloc+0xd4/0x100 mm/kasan/common.c:521 kasan_kmalloc include/linux/kasan.h:227 [inline] __kmalloc+0x13d/0x2c0 mm/slub.c:4436 kmalloc include/linux/slab.h:624 [inline] kzalloc include/linux/slab.h:750 [inline] l2tp_session_create+0x39/0xb60 net/l2tp/l2tp_core.c:1616 pppol2tp_connect+0xbf5/0x1640 net/l2tp/l2tp_ppp.c:772 __sys_connect_file net/socket.c:1922 [inline] __sys_connect+0x3cb/0x450 net/socket.c:1939 __do_sys_connect net/socket.c:1949 [inline] __se_sys_connect net/socket.c:1946 [inline] __x64_sys_connect+0x7a/0x90 net/socket.c:1946 x64_sys_call+0x7c/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:43 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 Freed by task 315: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4a/0x70 mm/kasan/common.c:45 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370 ____kasan_slab_free+0x125/0x160 mm/kasan/common.c:365 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:373 kasan_slab_free include/linux/kasan.h:193 [inline] slab_free_hook mm/slub.c:1728 [inline] slab_free_freelist_hook+0xc2/0x190 mm/slub.c:1754 slab_free mm/slub.c:3526 [inline] kfree+0xc4/0x270 mm/slub.c:4588 l2tp_session_free net/l2tp/l2tp_core.c:168 [inline] l2tp_session_put+0xaf/0x1a0 net/l2tp/l2tp_core.c:193 l2tp_session_delete+0x3a9/0x4a0 net/l2tp/l2tp_core.c:1589 l2tp_tunnel_closeall net/l2tp/l2tp_core.c:1235 [inline] l2tp_tunnel_del_work+0x180/0x3d0 net/l2tp/l2tp_core.c:1273 process_one_work+0x6c8/0xbb0 kernel/workqueue.c:2328 worker_thread+0xaa0/0x1250 kernel/workqueue.c:2475 kthread+0x3f5/0x4f0 kernel/kthread.c:337 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 The buggy address belongs to the object at ffff88812b781800 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 0 bytes inside of 512-byte region [ffff88812b781800, ffff88812b781a00) The buggy address belongs to the page: page:ffffea0004ade000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x12b780 head:ffffea0004ade000 order:2 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head|zone=1) raw: 4000000000010200 0000000000000000 dead000000000122 ffff888100042f00 raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 2, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 368, ts 28804773796, free_ts 27316783883 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x192/0x1b0 mm/page_alloc.c:2607 prep_new_page+0x1c/0x110 mm/page_alloc.c:2613 get_page_from_freelist+0x2c3a/0x2cd0 mm/page_alloc.c:4487 __alloc_pages+0x1a2/0x460 mm/page_alloc.c:5824 alloc_slab_page mm/slub.c:-1 [inline] allocate_slab mm/slub.c:1937 [inline] new_slab+0xa0/0x4d0 mm/slub.c:2000 ___slab_alloc+0x3ac/0x840 mm/slub.c:3033 __slab_alloc+0x49/0x90 mm/slub.c:3120 slab_alloc_node mm/slub.c:3211 [inline] slab_alloc mm/slub.c:3255 [inline] kmem_cache_alloc_trace+0x146/0x270 mm/slub.c:3272 kmalloc include/linux/slab.h:619 [inline] kmalloc_array include/linux/slab.h:658 [inline] rtnl_newlink+0x17f/0x1900 net/core/rtnetlink.c:3571 rtnetlink_rcv_msg+0x9fd/0xcb0 net/core/rtnetlink.c:5653 netlink_rcv_skb+0x1e9/0x430 net/netlink/af_netlink.c:2511 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:5671 netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline] netlink_unicast+0x86c/0xa30 net/netlink/af_netlink.c:1348 netlink_sendmsg+0x879/0xb80 net/netlink/af_netlink.c:1922 sock_sendmsg_nosec net/socket.c:704 [inline] __sock_sendmsg net/socket.c:716 [inline] __sys_sendto+0x46d/0x620 net/socket.c:2062 __do_sys_sendto net/socket.c:2074 [inline] __se_sys_sendto net/socket.c:2070 [inline] __x64_sys_sendto+0xe5/0x100 net/socket.c:2070 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1474 [inline] free_pcp_prepare mm/page_alloc.c:1546 [inline] free_unref_page_prepare+0x5fa/0x600 mm/page_alloc.c:3536 free_unref_page+0xae/0x540 mm/page_alloc.c:3618 free_the_page mm/page_alloc.c:805 [inline] __free_pages+0x6c/0x100 mm/page_alloc.c:5900 __vunmap+0x801/0x980 mm/vmalloc.c:2660 __vfree mm/vmalloc.c:2709 [inline] vfree+0x8b/0xc0 mm/vmalloc.c:2740 kcov_put kernel/kcov.c:417 [inline] kcov_close+0x2b/0x50 kernel/kcov.c:519 __fput+0x22b/0x900 fs/file_table.c:311 ____fput+0x15/0x20 fs/file_table.c:339 task_work_run+0x127/0x190 kernel/task_work.c:188 exit_task_work include/linux/task_work.h:33 [inline] do_exit+0xb70/0x29a0 kernel/exit.c:890 do_group_exit+0x149/0x310 kernel/exit.c:1004 get_signal+0x64f/0x1430 kernel/signal.c:2907 arch_do_signal_or_restart+0xe2/0x1100 arch/x86/kernel/signal.c:867 handle_signal_work kernel/entry/common.c:154 [inline] exit_to_user_mode_loop+0xa7/0xe0 kernel/entry/common.c:178 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:214 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline] syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:307 Memory state around the buggy address: ffff88812b781700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88812b781780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88812b781800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88812b781880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88812b781900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== ------------[ cut here ]------------ WARNING: CPU: 1 PID: 373 at net/l2tp/l2tp_ppp.c:156 pppol2tp_sock_to_session+0x167/0x1b0 net/l2tp/l2tp_ppp.c:156 Modules linked in: CPU: 0 PID: 373 Comm: syz.2.17 Tainted: G B syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 RIP: 0010:pppol2tp_sock_to_session+0x167/0x1b0 net/l2tp/l2tp_ppp.c:156 Code: 5d c3 e8 cc f2 0b fd be 02 00 00 00 eb 0a e8 c0 f2 0b fd be 01 00 00 00 4c 89 f7 e8 13 62 f2 fd e9 0f ff ff ff e8 a9 f2 0b fd <0f> 0b 48 89 df e8 ef 00 00 00 eb bd e8 98 f2 0b fd 4c 89 f7 be 03 RSP: 0018:ffffc90000b57d10 EFLAGS: 00010293 RAX: ffffffff845db907 RBX: ffff8881114c9000 RCX: ffff8881111662c0 RDX: 0000000000000000 RSI: 000000000ae4eaa0 RDI: 000000000c04eb7d RBP: ffffc90000b57d30 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffffbfff0e18c4c R12: dffffc0000000000 R13: dffffc0000000000 R14: 000000000ae4eaa0 R15: ffff88812b781800 FS: 000055558081e500(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f160e496300 CR3: 0000000122423000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: pppol2tp_release+0x150/0x2b0 net/l2tp/l2tp_ppp.c:435 __sock_release net/socket.c:649 [inline] sock_close+0xb8/0x200 net/socket.c:1335 __fput+0x22b/0x900 fs/file_table.c:311 ____fput+0x15/0x20 fs/file_table.c:339 task_work_run+0x127/0x190 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop+0xd0/0xe0 kernel/entry/common.c:181 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:214 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline] syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:307 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f160e24be59 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:00007ffc9172d2a8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007ffc9172d390 RCX: 00007f160e24be59 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 0000000000007079 R08: 0000000000000001 R09: 0000000000000000 R10: 0000001b32f20000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f160e4c4fac R14: 00007f160e4c4fa8 R15: 00007f160e4c4fa0 ---[ end trace cfb52b89e7743a00 ]--- final repro crashed as (corrupted=false): ================================================================== BUG: KASAN: use-after-free in pppol2tp_sock_to_session+0x1a0/0x1b0 net/l2tp/l2tp_ppp.c:156 Read of size 4 at addr ffff88812b781800 by task syz.2.17/373 CPU: 0 PID: 373 Comm: syz.2.17 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 Call Trace: __dump_stack+0x21/0x30 lib/dump_stack.c:88 dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:427 [inline] kasan_report+0x10f/0x150 mm/kasan/report.c:444 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report_generic.c:308 pppol2tp_sock_to_session+0x1a0/0x1b0 net/l2tp/l2tp_ppp.c:156 pppol2tp_release+0x150/0x2b0 net/l2tp/l2tp_ppp.c:435 __sock_release net/socket.c:649 [inline] sock_close+0xb8/0x200 net/socket.c:1335 __fput+0x22b/0x900 fs/file_table.c:311 ____fput+0x15/0x20 fs/file_table.c:339 task_work_run+0x127/0x190 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop+0xd0/0xe0 kernel/entry/common.c:181 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:214 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline] syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:307 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f160e24be59 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:00007ffc9172d2a8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007ffc9172d390 RCX: 00007f160e24be59 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 0000000000007079 R08: 0000000000000001 R09: 0000000000000000 R10: 0000001b32f20000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f160e4c4fac R14: 00007f160e4c4fa8 R15: 00007f160e4c4fa0 Allocated by task 373: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:433 [inline] ____kasan_kmalloc mm/kasan/common.c:512 [inline] __kasan_kmalloc+0xd4/0x100 mm/kasan/common.c:521 kasan_kmalloc include/linux/kasan.h:227 [inline] __kmalloc+0x13d/0x2c0 mm/slub.c:4436 kmalloc include/linux/slab.h:624 [inline] kzalloc include/linux/slab.h:750 [inline] l2tp_session_create+0x39/0xb60 net/l2tp/l2tp_core.c:1616 pppol2tp_connect+0xbf5/0x1640 net/l2tp/l2tp_ppp.c:772 __sys_connect_file net/socket.c:1922 [inline] __sys_connect+0x3cb/0x450 net/socket.c:1939 __do_sys_connect net/socket.c:1949 [inline] __se_sys_connect net/socket.c:1946 [inline] __x64_sys_connect+0x7a/0x90 net/socket.c:1946 x64_sys_call+0x7c/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:43 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 Freed by task 315: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4a/0x70 mm/kasan/common.c:45 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370 ____kasan_slab_free+0x125/0x160 mm/kasan/common.c:365 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:373 kasan_slab_free include/linux/kasan.h:193 [inline] slab_free_hook mm/slub.c:1728 [inline] slab_free_freelist_hook+0xc2/0x190 mm/slub.c:1754 slab_free mm/slub.c:3526 [inline] kfree+0xc4/0x270 mm/slub.c:4588 l2tp_session_free net/l2tp/l2tp_core.c:168 [inline] l2tp_session_put+0xaf/0x1a0 net/l2tp/l2tp_core.c:193 l2tp_session_delete+0x3a9/0x4a0 net/l2tp/l2tp_core.c:1589 l2tp_tunnel_closeall net/l2tp/l2tp_core.c:1235 [inline] l2tp_tunnel_del_work+0x180/0x3d0 net/l2tp/l2tp_core.c:1273 process_one_work+0x6c8/0xbb0 kernel/workqueue.c:2328 worker_thread+0xaa0/0x1250 kernel/workqueue.c:2475 kthread+0x3f5/0x4f0 kernel/kthread.c:337 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 The buggy address belongs to the object at ffff88812b781800 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 0 bytes inside of 512-byte region [ffff88812b781800, ffff88812b781a00) The buggy address belongs to the page: page:ffffea0004ade000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x12b780 head:ffffea0004ade000 order:2 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head|zone=1) raw: 4000000000010200 0000000000000000 dead000000000122 ffff888100042f00 raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 2, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 368, ts 28804773796, free_ts 27316783883 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x192/0x1b0 mm/page_alloc.c:2607 prep_new_page+0x1c/0x110 mm/page_alloc.c:2613 get_page_from_freelist+0x2c3a/0x2cd0 mm/page_alloc.c:4487 __alloc_pages+0x1a2/0x460 mm/page_alloc.c:5824 alloc_slab_page mm/slub.c:-1 [inline] allocate_slab mm/slub.c:1937 [inline] new_slab+0xa0/0x4d0 mm/slub.c:2000 ___slab_alloc+0x3ac/0x840 mm/slub.c:3033 __slab_alloc+0x49/0x90 mm/slub.c:3120 slab_alloc_node mm/slub.c:3211 [inline] slab_alloc mm/slub.c:3255 [inline] kmem_cache_alloc_trace+0x146/0x270 mm/slub.c:3272 kmalloc include/linux/slab.h:619 [inline] kmalloc_array include/linux/slab.h:658 [inline] rtnl_newlink+0x17f/0x1900 net/core/rtnetlink.c:3571 rtnetlink_rcv_msg+0x9fd/0xcb0 net/core/rtnetlink.c:5653 netlink_rcv_skb+0x1e9/0x430 net/netlink/af_netlink.c:2511 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:5671 netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline] netlink_unicast+0x86c/0xa30 net/netlink/af_netlink.c:1348 netlink_sendmsg+0x879/0xb80 net/netlink/af_netlink.c:1922 sock_sendmsg_nosec net/socket.c:704 [inline] __sock_sendmsg net/socket.c:716 [inline] __sys_sendto+0x46d/0x620 net/socket.c:2062 __do_sys_sendto net/socket.c:2074 [inline] __se_sys_sendto net/socket.c:2070 [inline] __x64_sys_sendto+0xe5/0x100 net/socket.c:2070 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1474 [inline] free_pcp_prepare mm/page_alloc.c:1546 [inline] free_unref_page_prepare+0x5fa/0x600 mm/page_alloc.c:3536 free_unref_page+0xae/0x540 mm/page_alloc.c:3618 free_the_page mm/page_alloc.c:805 [inline] __free_pages+0x6c/0x100 mm/page_alloc.c:5900 __vunmap+0x801/0x980 mm/vmalloc.c:2660 __vfree mm/vmalloc.c:2709 [inline] vfree+0x8b/0xc0 mm/vmalloc.c:2740 kcov_put kernel/kcov.c:417 [inline] kcov_close+0x2b/0x50 kernel/kcov.c:519 __fput+0x22b/0x900 fs/file_table.c:311 ____fput+0x15/0x20 fs/file_table.c:339 task_work_run+0x127/0x190 kernel/task_work.c:188 exit_task_work include/linux/task_work.h:33 [inline] do_exit+0xb70/0x29a0 kernel/exit.c:890 do_group_exit+0x149/0x310 kernel/exit.c:1004 get_signal+0x64f/0x1430 kernel/signal.c:2907 arch_do_signal_or_restart+0xe2/0x1100 arch/x86/kernel/signal.c:867 handle_signal_work kernel/entry/common.c:154 [inline] exit_to_user_mode_loop+0xa7/0xe0 kernel/entry/common.c:178 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:214 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline] syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:307 Memory state around the buggy address: ffff88812b781700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88812b781780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88812b781800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88812b781880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88812b781900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== ------------[ cut here ]------------ WARNING: CPU: 1 PID: 373 at net/l2tp/l2tp_ppp.c:156 pppol2tp_sock_to_session+0x167/0x1b0 net/l2tp/l2tp_ppp.c:156 Modules linked in: CPU: 0 PID: 373 Comm: syz.2.17 Tainted: G B syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 RIP: 0010:pppol2tp_sock_to_session+0x167/0x1b0 net/l2tp/l2tp_ppp.c:156 Code: 5d c3 e8 cc f2 0b fd be 02 00 00 00 eb 0a e8 c0 f2 0b fd be 01 00 00 00 4c 89 f7 e8 13 62 f2 fd e9 0f ff ff ff e8 a9 f2 0b fd <0f> 0b 48 89 df e8 ef 00 00 00 eb bd e8 98 f2 0b fd 4c 89 f7 be 03 RSP: 0018:ffffc90000b57d10 EFLAGS: 00010293 RAX: ffffffff845db907 RBX: ffff8881114c9000 RCX: ffff8881111662c0 RDX: 0000000000000000 RSI: 000000000ae4eaa0 RDI: 000000000c04eb7d RBP: ffffc90000b57d30 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffffbfff0e18c4c R12: dffffc0000000000 R13: dffffc0000000000 R14: 000000000ae4eaa0 R15: ffff88812b781800 FS: 000055558081e500(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f160e496300 CR3: 0000000122423000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: pppol2tp_release+0x150/0x2b0 net/l2tp/l2tp_ppp.c:435 __sock_release net/socket.c:649 [inline] sock_close+0xb8/0x200 net/socket.c:1335 __fput+0x22b/0x900 fs/file_table.c:311 ____fput+0x15/0x20 fs/file_table.c:339 task_work_run+0x127/0x190 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop+0xd0/0xe0 kernel/entry/common.c:181 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:214 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline] syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:307 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f160e24be59 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:00007ffc9172d2a8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007ffc9172d390 RCX: 00007f160e24be59 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 0000000000007079 R08: 0000000000000001 R09: 0000000000000000 R10: 0000001b32f20000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f160e4c4fac R14: 00007f160e4c4fa8 R15: 00007f160e4c4fa0 ---[ end trace cfb52b89e7743a00 ]---