Extracting prog: 2m23.198978155s
Minimizing prog: 39m14.221798719s
Simplifying prog options: 0s
Extracting C: 42.136556324s
Simplifying C: 20m31.633603627s


1 programs, timeouts [30s 1m40s 6m0s]
extracting reproducer from 1 programs
testing a last program of every proc
single: executing 1 programs separately with timeout 30s
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-syz_genetlink_get_family_id$mptcp-sendmsg$MPTCP_PM_CMD_ADD_ADDR-socket$nl_generic-syz_genetlink_get_family_id$mptcp-sendmsg$MPTCP_PM_CMD_ADD_ADDR-socket$inet_mptcp-bind$inet-connect$inet-sendmmsg$inet
detailed listing:
executing program 0:
r0 = socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$mptcp(&(0x7f0000000000), 0xffffffffffffffff)
sendmsg$MPTCP_PM_CMD_ADD_ADDR(r0, &(0x7f0000000400)={0x0, 0x0, &(0x7f00000003c0)={&(0x7f0000000300)={0x38, r1, 0x1, 0x0, 0x0, {}, [@MPTCP_PM_ATTR_ADDR={0x24, 0x1, 0x0, 0x1, [@MPTCP_PM_ADDR_ATTR_PORT={0x6, 0x5, 0x4e23}, @MPTCP_PM_ADDR_ATTR_FAMILY={0x6, 0x1, 0x2}, @MPTCP_PM_ADDR_ATTR_ADDR4={0x8, 0x3, @multicast1=0xac1414aa}, @MPTCP_PM_ADDR_ATTR_FLAGS={0x8, 0x6, 0x1}]}]}, 0x38}}, 0x0)
r2 = socket$nl_generic(0x10, 0x3, 0x10)
r3 = syz_genetlink_get_family_id$mptcp(&(0x7f0000000000), 0xffffffffffffffff)
sendmsg$MPTCP_PM_CMD_ADD_ADDR(r2, &(0x7f0000000400)={0x0, 0x0, &(0x7f00000003c0)={&(0x7f0000000200)={0x34, r3, 0x1, 0x0, 0x0, {}, [@MPTCP_PM_ATTR_ADDR={0x20, 0x1, 0x0, 0x1, [@MPTCP_PM_ADDR_ATTR_ADDR6={0x14, 0x4, @rand_addr=' \x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01'}, @MPTCP_PM_ADDR_ATTR_FAMILY={0x6, 0x1, 0xa}]}]}, 0x34}}, 0x0)
r4 = socket$inet_mptcp(0x2, 0x1, 0x106)
bind$inet(r4, &(0x7f0000000080)={0x2, 0x4e24, @multicast2}, 0x10)
connect$inet(r4, &(0x7f0000000480)={0x2, 0x0, @local}, 0x10)
sendmmsg$inet(r4, &(0x7f0000000d00)=[{{&(0x7f0000000000)={0x2, 0x234e, @empty}, 0x10, 0x0}}], 0x1, 0x20000080)

program did not crash
single: failed to extract reproducer
single: executing 1 programs separately with timeout 1m40s
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-syz_genetlink_get_family_id$mptcp-sendmsg$MPTCP_PM_CMD_ADD_ADDR-socket$nl_generic-syz_genetlink_get_family_id$mptcp-sendmsg$MPTCP_PM_CMD_ADD_ADDR-socket$inet_mptcp-bind$inet-connect$inet-sendmmsg$inet
detailed listing:
executing program 0:
r0 = socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$mptcp(&(0x7f0000000000), 0xffffffffffffffff)
sendmsg$MPTCP_PM_CMD_ADD_ADDR(r0, &(0x7f0000000400)={0x0, 0x0, &(0x7f00000003c0)={&(0x7f0000000300)={0x38, r1, 0x1, 0x0, 0x0, {}, [@MPTCP_PM_ATTR_ADDR={0x24, 0x1, 0x0, 0x1, [@MPTCP_PM_ADDR_ATTR_PORT={0x6, 0x5, 0x4e23}, @MPTCP_PM_ADDR_ATTR_FAMILY={0x6, 0x1, 0x2}, @MPTCP_PM_ADDR_ATTR_ADDR4={0x8, 0x3, @multicast1=0xac1414aa}, @MPTCP_PM_ADDR_ATTR_FLAGS={0x8, 0x6, 0x1}]}]}, 0x38}}, 0x0)
r2 = socket$nl_generic(0x10, 0x3, 0x10)
r3 = syz_genetlink_get_family_id$mptcp(&(0x7f0000000000), 0xffffffffffffffff)
sendmsg$MPTCP_PM_CMD_ADD_ADDR(r2, &(0x7f0000000400)={0x0, 0x0, &(0x7f00000003c0)={&(0x7f0000000200)={0x34, r3, 0x1, 0x0, 0x0, {}, [@MPTCP_PM_ATTR_ADDR={0x20, 0x1, 0x0, 0x1, [@MPTCP_PM_ADDR_ATTR_ADDR6={0x14, 0x4, @rand_addr=' \x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01'}, @MPTCP_PM_ADDR_ATTR_FAMILY={0x6, 0x1, 0xa}]}]}, 0x34}}, 0x0)
r4 = socket$inet_mptcp(0x2, 0x1, 0x106)
bind$inet(r4, &(0x7f0000000080)={0x2, 0x4e24, @multicast2}, 0x10)
connect$inet(r4, &(0x7f0000000480)={0x2, 0x0, @local}, 0x10)
sendmmsg$inet(r4, &(0x7f0000000d00)=[{{&(0x7f0000000000)={0x2, 0x234e, @empty}, 0x10, 0x0}}], 0x1, 0x20000080)

program crashed: possible deadlock in sk_clone_lock
single: successfully extracted reproducer
found reproducer with 10 syscalls
minimizing guilty program
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-syz_genetlink_get_family_id$mptcp-sendmsg$MPTCP_PM_CMD_ADD_ADDR-socket$nl_generic-syz_genetlink_get_family_id$mptcp-sendmsg$MPTCP_PM_CMD_ADD_ADDR-socket$inet_mptcp-bind$inet-connect$inet
detailed listing:
executing program 0:
r0 = socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$mptcp(&(0x7f0000000000), 0xffffffffffffffff)
sendmsg$MPTCP_PM_CMD_ADD_ADDR(r0, &(0x7f0000000400)={0x0, 0x0, &(0x7f00000003c0)={&(0x7f0000000300)={0x38, r1, 0x1, 0x0, 0x0, {}, [@MPTCP_PM_ATTR_ADDR={0x24, 0x1, 0x0, 0x1, [@MPTCP_PM_ADDR_ATTR_PORT={0x6, 0x5, 0x4e23}, @MPTCP_PM_ADDR_ATTR_FAMILY={0x6, 0x1, 0x2}, @MPTCP_PM_ADDR_ATTR_ADDR4={0x8, 0x3, @multicast1=0xac1414aa}, @MPTCP_PM_ADDR_ATTR_FLAGS={0x8, 0x6, 0x1}]}]}, 0x38}}, 0x0)
r2 = socket$nl_generic(0x10, 0x3, 0x10)
r3 = syz_genetlink_get_family_id$mptcp(&(0x7f0000000000), 0xffffffffffffffff)
sendmsg$MPTCP_PM_CMD_ADD_ADDR(r2, &(0x7f0000000400)={0x0, 0x0, &(0x7f00000003c0)={&(0x7f0000000200)={0x34, r3, 0x1, 0x0, 0x0, {}, [@MPTCP_PM_ATTR_ADDR={0x20, 0x1, 0x0, 0x1, [@MPTCP_PM_ADDR_ATTR_ADDR6={0x14, 0x4, @rand_addr=' \x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01'}, @MPTCP_PM_ADDR_ATTR_FAMILY={0x6, 0x1, 0xa}]}]}, 0x34}}, 0x0)
r4 = socket$inet_mptcp(0x2, 0x1, 0x106)
bind$inet(r4, &(0x7f0000000080)={0x2, 0x4e24, @multicast2}, 0x10)
connect$inet(r4, &(0x7f0000000480)={0x2, 0x0, @local}, 0x10)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-syz_genetlink_get_family_id$mptcp-sendmsg$MPTCP_PM_CMD_ADD_ADDR-socket$nl_generic-syz_genetlink_get_family_id$mptcp-sendmsg$MPTCP_PM_CMD_ADD_ADDR-socket$inet_mptcp-bind$inet-sendmmsg$inet
detailed listing:
executing program 0:
r0 = socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$mptcp(&(0x7f0000000000), 0xffffffffffffffff)
sendmsg$MPTCP_PM_CMD_ADD_ADDR(r0, &(0x7f0000000400)={0x0, 0x0, &(0x7f00000003c0)={&(0x7f0000000300)={0x38, r1, 0x1, 0x0, 0x0, {}, [@MPTCP_PM_ATTR_ADDR={0x24, 0x1, 0x0, 0x1, [@MPTCP_PM_ADDR_ATTR_PORT={0x6, 0x5, 0x4e23}, @MPTCP_PM_ADDR_ATTR_FAMILY={0x6, 0x1, 0x2}, @MPTCP_PM_ADDR_ATTR_ADDR4={0x8, 0x3, @multicast1=0xac1414aa}, @MPTCP_PM_ADDR_ATTR_FLAGS={0x8, 0x6, 0x1}]}]}, 0x38}}, 0x0)
r2 = socket$nl_generic(0x10, 0x3, 0x10)
r3 = syz_genetlink_get_family_id$mptcp(&(0x7f0000000000), 0xffffffffffffffff)
sendmsg$MPTCP_PM_CMD_ADD_ADDR(r2, &(0x7f0000000400)={0x0, 0x0, &(0x7f00000003c0)={&(0x7f0000000200)={0x34, r3, 0x1, 0x0, 0x0, {}, [@MPTCP_PM_ATTR_ADDR={0x20, 0x1, 0x0, 0x1, [@MPTCP_PM_ADDR_ATTR_ADDR6={0x14, 0x4, @rand_addr=' \x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01'}, @MPTCP_PM_ADDR_ATTR_FAMILY={0x6, 0x1, 0xa}]}]}, 0x34}}, 0x0)
r4 = socket$inet_mptcp(0x2, 0x1, 0x106)
bind$inet(r4, &(0x7f0000000080)={0x2, 0x4e24, @multicast2}, 0x10)
sendmmsg$inet(r4, &(0x7f0000000d00)=[{{&(0x7f0000000000)={0x2, 0x234e, @empty}, 0x10, 0x0}}], 0x1, 0x20000080)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-syz_genetlink_get_family_id$mptcp-sendmsg$MPTCP_PM_CMD_ADD_ADDR-socket$nl_generic-syz_genetlink_get_family_id$mptcp-sendmsg$MPTCP_PM_CMD_ADD_ADDR-socket$inet_mptcp-connect$inet-sendmmsg$inet
detailed listing:
executing program 0:
r0 = socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$mptcp(&(0x7f0000000000), 0xffffffffffffffff)
sendmsg$MPTCP_PM_CMD_ADD_ADDR(r0, &(0x7f0000000400)={0x0, 0x0, &(0x7f00000003c0)={&(0x7f0000000300)={0x38, r1, 0x1, 0x0, 0x0, {}, [@MPTCP_PM_ATTR_ADDR={0x24, 0x1, 0x0, 0x1, [@MPTCP_PM_ADDR_ATTR_PORT={0x6, 0x5, 0x4e23}, @MPTCP_PM_ADDR_ATTR_FAMILY={0x6, 0x1, 0x2}, @MPTCP_PM_ADDR_ATTR_ADDR4={0x8, 0x3, @multicast1=0xac1414aa}, @MPTCP_PM_ADDR_ATTR_FLAGS={0x8, 0x6, 0x1}]}]}, 0x38}}, 0x0)
r2 = socket$nl_generic(0x10, 0x3, 0x10)
r3 = syz_genetlink_get_family_id$mptcp(&(0x7f0000000000), 0xffffffffffffffff)
sendmsg$MPTCP_PM_CMD_ADD_ADDR(r2, &(0x7f0000000400)={0x0, 0x0, &(0x7f00000003c0)={&(0x7f0000000200)={0x34, r3, 0x1, 0x0, 0x0, {}, [@MPTCP_PM_ATTR_ADDR={0x20, 0x1, 0x0, 0x1, [@MPTCP_PM_ADDR_ATTR_ADDR6={0x14, 0x4, @rand_addr=' \x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01'}, @MPTCP_PM_ADDR_ATTR_FAMILY={0x6, 0x1, 0xa}]}]}, 0x34}}, 0x0)
r4 = socket$inet_mptcp(0x2, 0x1, 0x106)
connect$inet(r4, &(0x7f0000000480)={0x2, 0x0, @local}, 0x10)
sendmmsg$inet(r4, &(0x7f0000000d00)=[{{&(0x7f0000000000)={0x2, 0x234e, @empty}, 0x10, 0x0}}], 0x1, 0x20000080)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-syz_genetlink_get_family_id$mptcp-sendmsg$MPTCP_PM_CMD_ADD_ADDR-socket$nl_generic-syz_genetlink_get_family_id$mptcp-sendmsg$MPTCP_PM_CMD_ADD_ADDR-bind$inet-connect$inet-sendmmsg$inet
detailed listing:
executing program 0:
r0 = socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$mptcp(&(0x7f0000000000), 0xffffffffffffffff)
sendmsg$MPTCP_PM_CMD_ADD_ADDR(r0, &(0x7f0000000400)={0x0, 0x0, &(0x7f00000003c0)={&(0x7f0000000300)={0x38, r1, 0x1, 0x0, 0x0, {}, [@MPTCP_PM_ATTR_ADDR={0x24, 0x1, 0x0, 0x1, [@MPTCP_PM_ADDR_ATTR_PORT={0x6, 0x5, 0x4e23}, @MPTCP_PM_ADDR_ATTR_FAMILY={0x6, 0x1, 0x2}, @MPTCP_PM_ADDR_ATTR_ADDR4={0x8, 0x3, @multicast1=0xac1414aa}, @MPTCP_PM_ADDR_ATTR_FLAGS={0x8, 0x6, 0x1}]}]}, 0x38}}, 0x0)
r2 = socket$nl_generic(0x10, 0x3, 0x10)
r3 = syz_genetlink_get_family_id$mptcp(&(0x7f0000000000), 0xffffffffffffffff)
sendmsg$MPTCP_PM_CMD_ADD_ADDR(r2, &(0x7f0000000400)={0x0, 0x0, &(0x7f00000003c0)={&(0x7f0000000200)={0x34, r3, 0x1, 0x0, 0x0, {}, [@MPTCP_PM_ATTR_ADDR={0x20, 0x1, 0x0, 0x1, [@MPTCP_PM_ADDR_ATTR_ADDR6={0x14, 0x4, @rand_addr=' \x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01'}, @MPTCP_PM_ADDR_ATTR_FAMILY={0x6, 0x1, 0xa}]}]}, 0x34}}, 0x0)
bind$inet(0xffffffffffffffff, &(0x7f0000000080)={0x2, 0x4e24, @multicast2}, 0x10)
connect$inet(0xffffffffffffffff, &(0x7f0000000480)={0x2, 0x0, @local}, 0x10)
sendmmsg$inet(0xffffffffffffffff, &(0x7f0000000d00)=[{{&(0x7f0000000000)={0x2, 0x234e, @empty}, 0x10, 0x0}}], 0x1, 0x20000080)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-syz_genetlink_get_family_id$mptcp-sendmsg$MPTCP_PM_CMD_ADD_ADDR-socket$nl_generic-syz_genetlink_get_family_id$mptcp-socket$inet_mptcp-bind$inet-connect$inet-sendmmsg$inet
detailed listing:
executing program 0:
r0 = socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$mptcp(&(0x7f0000000000), 0xffffffffffffffff)
sendmsg$MPTCP_PM_CMD_ADD_ADDR(r0, &(0x7f0000000400)={0x0, 0x0, &(0x7f00000003c0)={&(0x7f0000000300)={0x38, r1, 0x1, 0x0, 0x0, {}, [@MPTCP_PM_ATTR_ADDR={0x24, 0x1, 0x0, 0x1, [@MPTCP_PM_ADDR_ATTR_PORT={0x6, 0x5, 0x4e23}, @MPTCP_PM_ADDR_ATTR_FAMILY={0x6, 0x1, 0x2}, @MPTCP_PM_ADDR_ATTR_ADDR4={0x8, 0x3, @multicast1=0xac1414aa}, @MPTCP_PM_ADDR_ATTR_FLAGS={0x8, 0x6, 0x1}]}]}, 0x38}}, 0x0)
socket$nl_generic(0x10, 0x3, 0x10)
syz_genetlink_get_family_id$mptcp(&(0x7f0000000000), 0xffffffffffffffff)
r2 = socket$inet_mptcp(0x2, 0x1, 0x106)
bind$inet(r2, &(0x7f0000000080)={0x2, 0x4e24, @multicast2}, 0x10)
connect$inet(r2, &(0x7f0000000480)={0x2, 0x0, @local}, 0x10)
sendmmsg$inet(r2, &(0x7f0000000d00)=[{{&(0x7f0000000000)={0x2, 0x234e, @empty}, 0x10, 0x0}}], 0x1, 0x20000080)

program crashed: possible deadlock in sk_clone_lock
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-syz_genetlink_get_family_id$mptcp-sendmsg$MPTCP_PM_CMD_ADD_ADDR-socket$nl_generic-socket$inet_mptcp-bind$inet-connect$inet-sendmmsg$inet
detailed listing:
executing program 0:
r0 = socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$mptcp(&(0x7f0000000000), 0xffffffffffffffff)
sendmsg$MPTCP_PM_CMD_ADD_ADDR(r0, &(0x7f0000000400)={0x0, 0x0, &(0x7f00000003c0)={&(0x7f0000000300)={0x38, r1, 0x1, 0x0, 0x0, {}, [@MPTCP_PM_ATTR_ADDR={0x24, 0x1, 0x0, 0x1, [@MPTCP_PM_ADDR_ATTR_PORT={0x6, 0x5, 0x4e23}, @MPTCP_PM_ADDR_ATTR_FAMILY={0x6, 0x1, 0x2}, @MPTCP_PM_ADDR_ATTR_ADDR4={0x8, 0x3, @multicast1=0xac1414aa}, @MPTCP_PM_ADDR_ATTR_FLAGS={0x8, 0x6, 0x1}]}]}, 0x38}}, 0x0)
socket$nl_generic(0x10, 0x3, 0x10)
r2 = socket$inet_mptcp(0x2, 0x1, 0x106)
bind$inet(r2, &(0x7f0000000080)={0x2, 0x4e24, @multicast2}, 0x10)
connect$inet(r2, &(0x7f0000000480)={0x2, 0x0, @local}, 0x10)
sendmmsg$inet(r2, &(0x7f0000000d00)=[{{&(0x7f0000000000)={0x2, 0x234e, @empty}, 0x10, 0x0}}], 0x1, 0x20000080)

program crashed: possible deadlock in sk_clone_lock
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-syz_genetlink_get_family_id$mptcp-sendmsg$MPTCP_PM_CMD_ADD_ADDR-socket$inet_mptcp-bind$inet-connect$inet-sendmmsg$inet
detailed listing:
executing program 0:
r0 = socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$mptcp(&(0x7f0000000000), 0xffffffffffffffff)
sendmsg$MPTCP_PM_CMD_ADD_ADDR(r0, &(0x7f0000000400)={0x0, 0x0, &(0x7f00000003c0)={&(0x7f0000000300)={0x38, r1, 0x1, 0x0, 0x0, {}, [@MPTCP_PM_ATTR_ADDR={0x24, 0x1, 0x0, 0x1, [@MPTCP_PM_ADDR_ATTR_PORT={0x6, 0x5, 0x4e23}, @MPTCP_PM_ADDR_ATTR_FAMILY={0x6, 0x1, 0x2}, @MPTCP_PM_ADDR_ATTR_ADDR4={0x8, 0x3, @multicast1=0xac1414aa}, @MPTCP_PM_ADDR_ATTR_FLAGS={0x8, 0x6, 0x1}]}]}, 0x38}}, 0x0)
r2 = socket$inet_mptcp(0x2, 0x1, 0x106)
bind$inet(r2, &(0x7f0000000080)={0x2, 0x4e24, @multicast2}, 0x10)
connect$inet(r2, &(0x7f0000000480)={0x2, 0x0, @local}, 0x10)
sendmmsg$inet(r2, &(0x7f0000000d00)=[{{&(0x7f0000000000)={0x2, 0x234e, @empty}, 0x10, 0x0}}], 0x1, 0x20000080)

program crashed: possible deadlock in sk_clone_lock
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-syz_genetlink_get_family_id$mptcp-socket$inet_mptcp-bind$inet-connect$inet-sendmmsg$inet
detailed listing:
executing program 0:
socket$nl_generic(0x10, 0x3, 0x10)
syz_genetlink_get_family_id$mptcp(&(0x7f0000000000), 0xffffffffffffffff)
r0 = socket$inet_mptcp(0x2, 0x1, 0x106)
bind$inet(r0, &(0x7f0000000080)={0x2, 0x4e24, @multicast2}, 0x10)
connect$inet(r0, &(0x7f0000000480)={0x2, 0x0, @local}, 0x10)
sendmmsg$inet(r0, &(0x7f0000000d00)=[{{&(0x7f0000000000)={0x2, 0x234e, @empty}, 0x10, 0x0}}], 0x1, 0x20000080)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-sendmsg$MPTCP_PM_CMD_ADD_ADDR-socket$inet_mptcp-bind$inet-connect$inet-sendmmsg$inet
detailed listing:
executing program 0:
r0 = socket$nl_generic(0x10, 0x3, 0x10)
sendmsg$MPTCP_PM_CMD_ADD_ADDR(r0, &(0x7f0000000400)={0x0, 0x0, &(0x7f00000003c0)={&(0x7f0000000300)={0x38, 0x0, 0x1, 0x0, 0x0, {}, [@MPTCP_PM_ATTR_ADDR={0x24, 0x1, 0x0, 0x1, [@MPTCP_PM_ADDR_ATTR_PORT={0x6, 0x5, 0x4e23}, @MPTCP_PM_ADDR_ATTR_FAMILY={0x6, 0x1, 0x2}, @MPTCP_PM_ADDR_ATTR_ADDR4={0x8, 0x3, @multicast1=0xac1414aa}, @MPTCP_PM_ADDR_ATTR_FLAGS={0x8, 0x6, 0x1}]}]}, 0x38}}, 0x0)
r1 = socket$inet_mptcp(0x2, 0x1, 0x106)
bind$inet(r1, &(0x7f0000000080)={0x2, 0x4e24, @multicast2}, 0x10)
connect$inet(r1, &(0x7f0000000480)={0x2, 0x0, @local}, 0x10)
sendmmsg$inet(r1, &(0x7f0000000d00)=[{{&(0x7f0000000000)={0x2, 0x234e, @empty}, 0x10, 0x0}}], 0x1, 0x20000080)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_genetlink_get_family_id$mptcp-sendmsg$MPTCP_PM_CMD_ADD_ADDR-socket$inet_mptcp-bind$inet-connect$inet-sendmmsg$inet
detailed listing:
executing program 0:
r0 = syz_genetlink_get_family_id$mptcp(&(0x7f0000000000), 0xffffffffffffffff)
sendmsg$MPTCP_PM_CMD_ADD_ADDR(0xffffffffffffffff, &(0x7f0000000400)={0x0, 0x0, &(0x7f00000003c0)={&(0x7f0000000300)={0x38, r0, 0x1, 0x0, 0x0, {}, [@MPTCP_PM_ATTR_ADDR={0x24, 0x1, 0x0, 0x1, [@MPTCP_PM_ADDR_ATTR_PORT={0x6, 0x5, 0x4e23}, @MPTCP_PM_ADDR_ATTR_FAMILY={0x6, 0x1, 0x2}, @MPTCP_PM_ADDR_ATTR_ADDR4={0x8, 0x3, @multicast1=0xac1414aa}, @MPTCP_PM_ADDR_ATTR_FLAGS={0x8, 0x6, 0x1}]}]}, 0x38}}, 0x0)
r1 = socket$inet_mptcp(0x2, 0x1, 0x106)
bind$inet(r1, &(0x7f0000000080)={0x2, 0x4e24, @multicast2}, 0x10)
connect$inet(r1, &(0x7f0000000480)={0x2, 0x0, @local}, 0x10)
sendmmsg$inet(r1, &(0x7f0000000d00)=[{{&(0x7f0000000000)={0x2, 0x234e, @empty}, 0x10, 0x0}}], 0x1, 0x20000080)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-syz_genetlink_get_family_id$mptcp-sendmsg$MPTCP_PM_CMD_ADD_ADDR-socket$inet_mptcp-bind$inet-connect$inet-sendmmsg$inet
detailed listing:
executing program 0:
r0 = socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$mptcp(0x0, 0xffffffffffffffff)
sendmsg$MPTCP_PM_CMD_ADD_ADDR(r0, &(0x7f0000000400)={0x0, 0x0, &(0x7f00000003c0)={&(0x7f0000000300)={0x38, r1, 0x1, 0x0, 0x0, {}, [@MPTCP_PM_ATTR_ADDR={0x24, 0x1, 0x0, 0x1, [@MPTCP_PM_ADDR_ATTR_PORT={0x6, 0x5, 0x4e23}, @MPTCP_PM_ADDR_ATTR_FAMILY={0x6, 0x1, 0x2}, @MPTCP_PM_ADDR_ATTR_ADDR4={0x8, 0x3, @multicast1=0xac1414aa}, @MPTCP_PM_ADDR_ATTR_FLAGS={0x8, 0x6, 0x1}]}]}, 0x38}}, 0x0)
r2 = socket$inet_mptcp(0x2, 0x1, 0x106)
bind$inet(r2, &(0x7f0000000080)={0x2, 0x4e24, @multicast2}, 0x10)
connect$inet(r2, &(0x7f0000000480)={0x2, 0x0, @local}, 0x10)
sendmmsg$inet(r2, &(0x7f0000000d00)=[{{&(0x7f0000000000)={0x2, 0x234e, @empty}, 0x10, 0x0}}], 0x1, 0x20000080)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-syz_genetlink_get_family_id$mptcp-sendmsg$MPTCP_PM_CMD_ADD_ADDR-socket$inet_mptcp-bind$inet-connect$inet-sendmmsg$inet
detailed listing:
executing program 0:
r0 = socket$nl_generic(0x10, 0x3, 0x10)
syz_genetlink_get_family_id$mptcp(&(0x7f0000000000), 0xffffffffffffffff)
sendmsg$MPTCP_PM_CMD_ADD_ADDR(r0, 0x0, 0x0)
r1 = socket$inet_mptcp(0x2, 0x1, 0x106)
bind$inet(r1, &(0x7f0000000080)={0x2, 0x4e24, @multicast2}, 0x10)
connect$inet(r1, &(0x7f0000000480)={0x2, 0x0, @local}, 0x10)
sendmmsg$inet(r1, &(0x7f0000000d00)=[{{&(0x7f0000000000)={0x2, 0x234e, @empty}, 0x10, 0x0}}], 0x1, 0x20000080)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-syz_genetlink_get_family_id$mptcp-sendmsg$MPTCP_PM_CMD_ADD_ADDR-socket$inet_mptcp-bind$inet-connect$inet-sendmmsg$inet
detailed listing:
executing program 0:
r0 = socket$nl_generic(0x10, 0x3, 0x10)
syz_genetlink_get_family_id$mptcp(&(0x7f0000000000), 0xffffffffffffffff)
sendmsg$MPTCP_PM_CMD_ADD_ADDR(r0, &(0x7f0000000400)={0x0, 0x0, 0x0}, 0x0)
r1 = socket$inet_mptcp(0x2, 0x1, 0x106)
bind$inet(r1, &(0x7f0000000080)={0x2, 0x4e24, @multicast2}, 0x10)
connect$inet(r1, &(0x7f0000000480)={0x2, 0x0, @local}, 0x10)
sendmmsg$inet(r1, &(0x7f0000000d00)=[{{&(0x7f0000000000)={0x2, 0x234e, @empty}, 0x10, 0x0}}], 0x1, 0x20000080)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-syz_genetlink_get_family_id$mptcp-sendmsg$MPTCP_PM_CMD_ADD_ADDR-socket$inet_mptcp-bind$inet-connect$inet-sendmmsg$inet
detailed listing:
executing program 0:
r0 = socket$nl_generic(0x10, 0x3, 0x10)
syz_genetlink_get_family_id$mptcp(&(0x7f0000000000), 0xffffffffffffffff)
sendmsg$MPTCP_PM_CMD_ADD_ADDR(r0, &(0x7f0000000400)={0x0, 0x0, &(0x7f00000003c0)={0x0}}, 0x0)
r1 = socket$inet_mptcp(0x2, 0x1, 0x106)
bind$inet(r1, &(0x7f0000000080)={0x2, 0x4e24, @multicast2}, 0x10)
connect$inet(r1, &(0x7f0000000480)={0x2, 0x0, @local}, 0x10)
sendmmsg$inet(r1, &(0x7f0000000d00)=[{{&(0x7f0000000000)={0x2, 0x234e, @empty}, 0x10, 0x0}}], 0x1, 0x20000080)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-syz_genetlink_get_family_id$mptcp-sendmsg$MPTCP_PM_CMD_ADD_ADDR-socket$inet_mptcp-bind$inet-connect$inet-sendmmsg$inet
detailed listing:
executing program 0:
r0 = socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$mptcp(&(0x7f0000000000), 0xffffffffffffffff)
sendmsg$MPTCP_PM_CMD_ADD_ADDR(r0, &(0x7f0000000400)={0x0, 0x0, &(0x7f00000003c0)={&(0x7f0000000300)={0x18, r1, 0x1, 0x0, 0x0, {}, [@MPTCP_PM_ATTR_ADDR={0x4}]}, 0x18}}, 0x0)
r2 = socket$inet_mptcp(0x2, 0x1, 0x106)
bind$inet(r2, &(0x7f0000000080)={0x2, 0x4e24, @multicast2}, 0x10)
connect$inet(r2, &(0x7f0000000480)={0x2, 0x0, @local}, 0x10)
sendmmsg$inet(r2, &(0x7f0000000d00)=[{{&(0x7f0000000000)={0x2, 0x234e, @empty}, 0x10, 0x0}}], 0x1, 0x20000080)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-syz_genetlink_get_family_id$mptcp-sendmsg$MPTCP_PM_CMD_ADD_ADDR-socket$inet_mptcp-bind$inet-connect$inet-sendmmsg$inet
detailed listing:
executing program 0:
r0 = socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$mptcp(&(0x7f0000000000), 0xffffffffffffffff)
sendmsg$MPTCP_PM_CMD_ADD_ADDR(r0, &(0x7f0000000400)={0x0, 0x0, &(0x7f00000003c0)={&(0x7f0000000300)={0x38, r1, 0x1, 0x0, 0x0, {}, [@MPTCP_PM_ATTR_ADDR={0x24, 0x1, 0x0, 0x1, [@MPTCP_PM_ADDR_ATTR_PORT={0x6, 0x5, 0x4e23}, @MPTCP_PM_ADDR_ATTR_FAMILY={0x6, 0x1, 0x2}, @MPTCP_PM_ADDR_ATTR_ADDR4={0x8, 0x3, @multicast1=0xac1414aa}, @MPTCP_PM_ADDR_ATTR_FLAGS={0x8, 0x6, 0x1}]}]}, 0x38}}, 0x0)
r2 = socket$inet_mptcp(0x2, 0x1, 0x106)
bind$inet(r2, 0x0, 0x0)
connect$inet(r2, &(0x7f0000000480)={0x2, 0x0, @local}, 0x10)
sendmmsg$inet(r2, &(0x7f0000000d00)=[{{&(0x7f0000000000)={0x2, 0x234e, @empty}, 0x10, 0x0}}], 0x1, 0x20000080)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-syz_genetlink_get_family_id$mptcp-sendmsg$MPTCP_PM_CMD_ADD_ADDR-socket$inet_mptcp-bind$inet-connect$inet-sendmmsg$inet
detailed listing:
executing program 0:
r0 = socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$mptcp(&(0x7f0000000000), 0xffffffffffffffff)
sendmsg$MPTCP_PM_CMD_ADD_ADDR(r0, &(0x7f0000000400)={0x0, 0x0, &(0x7f00000003c0)={&(0x7f0000000300)={0x38, r1, 0x1, 0x0, 0x0, {}, [@MPTCP_PM_ATTR_ADDR={0x24, 0x1, 0x0, 0x1, [@MPTCP_PM_ADDR_ATTR_PORT={0x6, 0x5, 0x4e23}, @MPTCP_PM_ADDR_ATTR_FAMILY={0x6, 0x1, 0x2}, @MPTCP_PM_ADDR_ATTR_ADDR4={0x8, 0x3, @multicast1=0xac1414aa}, @MPTCP_PM_ADDR_ATTR_FLAGS={0x8, 0x6, 0x1}]}]}, 0x38}}, 0x0)
r2 = socket$inet_mptcp(0x2, 0x1, 0x106)
bind$inet(r2, &(0x7f0000000080)={0x2, 0x4e24, @multicast2}, 0x10)
connect$inet(r2, 0x0, 0x0)
sendmmsg$inet(r2, &(0x7f0000000d00)=[{{&(0x7f0000000000)={0x2, 0x234e, @empty}, 0x10, 0x0}}], 0x1, 0x20000080)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-syz_genetlink_get_family_id$mptcp-sendmsg$MPTCP_PM_CMD_ADD_ADDR-socket$inet_mptcp-bind$inet-connect$inet-sendmmsg$inet
detailed listing:
executing program 0:
r0 = socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$mptcp(&(0x7f0000000000), 0xffffffffffffffff)
sendmsg$MPTCP_PM_CMD_ADD_ADDR(r0, &(0x7f0000000400)={0x0, 0x0, &(0x7f00000003c0)={&(0x7f0000000300)={0x38, r1, 0x1, 0x0, 0x0, {}, [@MPTCP_PM_ATTR_ADDR={0x24, 0x1, 0x0, 0x1, [@MPTCP_PM_ADDR_ATTR_PORT={0x6, 0x5, 0x4e23}, @MPTCP_PM_ADDR_ATTR_FAMILY={0x6, 0x1, 0x2}, @MPTCP_PM_ADDR_ATTR_ADDR4={0x8, 0x3, @multicast1=0xac1414aa}, @MPTCP_PM_ADDR_ATTR_FLAGS={0x8, 0x6, 0x1}]}]}, 0x38}}, 0x0)
r2 = socket$inet_mptcp(0x2, 0x1, 0x106)
bind$inet(r2, &(0x7f0000000080)={0x2, 0x4e24, @multicast2}, 0x10)
connect$inet(r2, &(0x7f0000000480)={0x2, 0x0, @local}, 0x10)
sendmmsg$inet(r2, 0x0, 0x0, 0x20000080)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-syz_genetlink_get_family_id$mptcp-sendmsg$MPTCP_PM_CMD_ADD_ADDR-socket$inet_mptcp-bind$inet-connect$inet-sendmmsg$inet
detailed listing:
executing program 0:
r0 = socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$mptcp(&(0x7f0000000000), 0xffffffffffffffff)
sendmsg$MPTCP_PM_CMD_ADD_ADDR(r0, &(0x7f0000000400)={0x0, 0x0, &(0x7f00000003c0)={&(0x7f0000000300)={0x38, r1, 0x1, 0x0, 0x0, {}, [@MPTCP_PM_ATTR_ADDR={0x24, 0x1, 0x0, 0x1, [@MPTCP_PM_ADDR_ATTR_PORT={0x6, 0x5, 0x4e23}, @MPTCP_PM_ADDR_ATTR_FAMILY={0x6, 0x1, 0x2}, @MPTCP_PM_ADDR_ATTR_ADDR4={0x8, 0x3, @multicast1=0xac1414aa}, @MPTCP_PM_ADDR_ATTR_FLAGS={0x8, 0x6, 0x1}]}]}, 0x38}}, 0x0)
r2 = socket$inet_mptcp(0x2, 0x1, 0x106)
bind$inet(r2, &(0x7f0000000080)={0x2, 0x4e24, @multicast2}, 0x10)
connect$inet(r2, &(0x7f0000000480)={0x2, 0x0, @local}, 0x10)
sendmmsg$inet(r2, &(0x7f0000000d00)=[{{0x0, 0x0, 0x0}}], 0x1, 0x20000080)

program did not crash
extracting C reproducer
testing compiled C program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-syz_genetlink_get_family_id$mptcp-sendmsg$MPTCP_PM_CMD_ADD_ADDR-socket$inet_mptcp-bind$inet-connect$inet-sendmmsg$inet
program crashed: possible deadlock in sk_clone_lock
simplifying C reproducer
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-syz_genetlink_get_family_id$mptcp-sendmsg$MPTCP_PM_CMD_ADD_ADDR-socket$inet_mptcp-bind$inet-connect$inet-sendmmsg$inet
program crashed: possible deadlock in sk_clone_lock
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-syz_genetlink_get_family_id$mptcp-sendmsg$MPTCP_PM_CMD_ADD_ADDR-socket$inet_mptcp-bind$inet-connect$inet-sendmmsg$inet
program crashed: possible deadlock in sk_clone_lock
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-syz_genetlink_get_family_id$mptcp-sendmsg$MPTCP_PM_CMD_ADD_ADDR-socket$inet_mptcp-bind$inet-connect$inet-sendmmsg$inet
program did not crash
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-syz_genetlink_get_family_id$mptcp-sendmsg$MPTCP_PM_CMD_ADD_ADDR-socket$inet_mptcp-bind$inet-connect$inet-sendmmsg$inet
program did not crash
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:false NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-syz_genetlink_get_family_id$mptcp-sendmsg$MPTCP_PM_CMD_ADD_ADDR-socket$inet_mptcp-bind$inet-connect$inet-sendmmsg$inet
program did not crash
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:false Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-syz_genetlink_get_family_id$mptcp-sendmsg$MPTCP_PM_CMD_ADD_ADDR-socket$inet_mptcp-bind$inet-connect$inet-sendmmsg$inet
program crashed: possible deadlock in sk_clone_lock
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-syz_genetlink_get_family_id$mptcp-sendmsg$MPTCP_PM_CMD_ADD_ADDR-socket$inet_mptcp-bind$inet-connect$inet-sendmmsg$inet
program crashed: possible deadlock in sk_clone_lock
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-syz_genetlink_get_family_id$mptcp-sendmsg$MPTCP_PM_CMD_ADD_ADDR-socket$inet_mptcp-bind$inet-connect$inet-sendmmsg$inet
program crashed: possible deadlock in sk_clone_lock
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-syz_genetlink_get_family_id$mptcp-sendmsg$MPTCP_PM_CMD_ADD_ADDR-socket$inet_mptcp-bind$inet-connect$inet-sendmmsg$inet
program crashed: possible deadlock in sk_clone_lock
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-syz_genetlink_get_family_id$mptcp-sendmsg$MPTCP_PM_CMD_ADD_ADDR-socket$inet_mptcp-bind$inet-connect$inet-sendmmsg$inet
program crashed: possible deadlock in sk_clone_lock
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-syz_genetlink_get_family_id$mptcp-sendmsg$MPTCP_PM_CMD_ADD_ADDR-socket$inet_mptcp-bind$inet-connect$inet-sendmmsg$inet
program crashed: possible deadlock in sk_clone_lock
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-syz_genetlink_get_family_id$mptcp-sendmsg$MPTCP_PM_CMD_ADD_ADDR-socket$inet_mptcp-bind$inet-connect$inet-sendmmsg$inet
program crashed: possible deadlock in sk_clone_lock
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:false HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-syz_genetlink_get_family_id$mptcp-sendmsg$MPTCP_PM_CMD_ADD_ADDR-socket$inet_mptcp-bind$inet-connect$inet-sendmmsg$inet
program crashed: possible deadlock in sk_clone_lock
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:false HandleSegv:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-syz_genetlink_get_family_id$mptcp-sendmsg$MPTCP_PM_CMD_ADD_ADDR-socket$inet_mptcp-bind$inet-connect$inet-sendmmsg$inet
program crashed: possible deadlock in sk_clone_lock
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:true UseTmpDir:false HandleSegv:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-syz_genetlink_get_family_id$mptcp-sendmsg$MPTCP_PM_CMD_ADD_ADDR-socket$inet_mptcp-bind$inet-connect$inet-sendmmsg$inet
program crashed: possible deadlock in sk_clone_lock
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true 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$nl_generic-syz_genetlink_get_family_id$mptcp-sendmsg$MPTCP_PM_CMD_ADD_ADDR-socket$inet_mptcp-bind$inet-connect$inet-sendmmsg$inet
program crashed: possible deadlock in sk_clone_lock
reproducing took 1h2m51.190965751s
repro crashed as (corrupted=false):
============================================
WARNING: possible recursive locking detected
6.11.0-rc6-syzkaller-00019-g67784a74e258 #0 Not tainted
--------------------------------------------
syz-executor364/5113 is trying to acquire lock:
ffff8880449f1958 (k-slock-AF_INET){+.-.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline]
ffff8880449f1958 (k-slock-AF_INET){+.-.}-{2:2}, at: sk_clone_lock+0x2cd/0xf40 net/core/sock.c:2328

but task is already holding lock:
ffff88803fe3cb58 (k-slock-AF_INET){+.-.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline]
ffff88803fe3cb58 (k-slock-AF_INET){+.-.}-{2:2}, at: sk_clone_lock+0x2cd/0xf40 net/core/sock.c:2328

other info that might help us debug this:
 Possible unsafe locking scenario:

       CPU0
       ----
  lock(k-slock-AF_INET);
  lock(k-slock-AF_INET);

 *** DEADLOCK ***

 May be due to missing lock nesting notation

7 locks held by syz-executor364/5113:
 #0: ffff8880449f0e18 (sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1607 [inline]
 #0: ffff8880449f0e18 (sk_lock-AF_INET){+.+.}-{0:0}, at: mptcp_sendmsg+0x153/0x1b10 net/mptcp/protocol.c:1806
 #1: ffff88803fe39ad8 (k-sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1607 [inline]
 #1: ffff88803fe39ad8 (k-sk_lock-AF_INET){+.+.}-{0:0}, at: mptcp_sendmsg_fastopen+0x11f/0x530 net/mptcp/protocol.c:1727
 #2: ffffffff8e938320 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
 #2: ffffffff8e938320 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
 #2: ffffffff8e938320 (rcu_read_lock){....}-{1:2}, at: __ip_queue_xmit+0x5f/0x1b80 net/ipv4/ip_output.c:470
 #3: ffffffff8e938320 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
 #3: ffffffff8e938320 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
 #3: ffffffff8e938320 (rcu_read_lock){....}-{1:2}, at: ip_finish_output2+0x45f/0x1390 net/ipv4/ip_output.c:228
 #4: ffffffff8e938320 (rcu_read_lock){....}-{1:2}, at: local_lock_acquire include/linux/local_lock_internal.h:29 [inline]
 #4: ffffffff8e938320 (rcu_read_lock){....}-{1:2}, at: process_backlog+0x33b/0x15b0 net/core/dev.c:6104
 #5: ffffffff8e938320 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
 #5: ffffffff8e938320 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
 #5: ffffffff8e938320 (rcu_read_lock){....}-{1:2}, at: ip_local_deliver_finish+0x230/0x5f0 net/ipv4/ip_input.c:232
 #6: ffff88803fe3cb58 (k-slock-AF_INET){+.-.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline]
 #6: ffff88803fe3cb58 (k-slock-AF_INET){+.-.}-{2:2}, at: sk_clone_lock+0x2cd/0xf40 net/core/sock.c:2328

stack backtrace:
CPU: 0 UID: 0 PID: 5113 Comm: syz-executor364 Not tainted 6.11.0-rc6-syzkaller-00019-g67784a74e258 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:93 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119
 check_deadlock kernel/locking/lockdep.c:3061 [inline]
 validate_chain+0x15d3/0x5900 kernel/locking/lockdep.c:3855
 __lock_acquire+0x137a/0x2040 kernel/locking/lockdep.c:5142
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5759
 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
 _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
 spin_lock include/linux/spinlock.h:351 [inline]
 sk_clone_lock+0x2cd/0xf40 net/core/sock.c:2328
 mptcp_sk_clone_init+0x32/0x13c0 net/mptcp/protocol.c:3279
 subflow_syn_recv_sock+0x931/0x1920 net/mptcp/subflow.c:874
 tcp_check_req+0xfe4/0x1a20 net/ipv4/tcp_minisocks.c:853
 tcp_v4_rcv+0x1c3e/0x37f0 net/ipv4/tcp_ipv4.c:2267
 ip_protocol_deliver_rcu+0x22e/0x440 net/ipv4/ip_input.c:205
 ip_local_deliver_finish+0x341/0x5f0 net/ipv4/ip_input.c:233
 NF_HOOK+0x3a4/0x450 include/linux/netfilter.h:314
 NF_HOOK+0x3a4/0x450 include/linux/netfilter.h:314
 __netif_receive_skb_one_core net/core/dev.c:5661 [inline]
 __netif_receive_skb+0x2bf/0x650 net/core/dev.c:5775
 process_backlog+0x662/0x15b0 net/core/dev.c:6108
 __napi_poll+0xcb/0x490 net/core/dev.c:6772
 napi_poll net/core/dev.c:6841 [inline]
 net_rx_action+0x89b/0x1240 net/core/dev.c:6963
 handle_softirqs+0x2c4/0x970 kernel/softirq.c:554
 do_softirq+0x11b/0x1e0 kernel/softirq.c:455
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0x1bb/0x200 kernel/softirq.c:382
 local_bh_enable include/linux/bottom_half.h:33 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:908 [inline]
 __dev_queue_xmit+0x1763/0x3e90 net/core/dev.c:4450
 dev_queue_xmit include/linux/netdevice.h:3105 [inline]
 neigh_hh_output include/net/neighbour.h:526 [inline]
 neigh_output include/net/neighbour.h:540 [inline]
 ip_finish_output2+0xd41/0x1390 net/ipv4/ip_output.c:235
 ip_local_out net/ipv4/ip_output.c:129 [inline]
 __ip_queue_xmit+0x118c/0x1b80 net/ipv4/ip_output.c:535
 __tcp_transmit_skb+0x2544/0x3b30 net/ipv4/tcp_output.c:1466
 tcp_rcv_synsent_state_process net/ipv4/tcp_input.c:6542 [inline]
 tcp_rcv_state_process+0x2c32/0x4570 net/ipv4/tcp_input.c:6729
 tcp_v4_do_rcv+0x77d/0xc70 net/ipv4/tcp_ipv4.c:1934
 sk_backlog_rcv include/net/sock.h:1111 [inline]
 __release_sock+0x214/0x350 net/core/sock.c:3004
 release_sock+0x61/0x1f0 net/core/sock.c:3558
 mptcp_sendmsg_fastopen+0x1ad/0x530 net/mptcp/protocol.c:1733
 mptcp_sendmsg+0x1884/0x1b10 net/mptcp/protocol.c:1812
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x1a6/0x270 net/socket.c:745
 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2597
 ___sys_sendmsg net/socket.c:2651 [inline]
 __sys_sendmmsg+0x3b2/0x740 net/socket.c:2737
 __do_sys_sendmmsg net/socket.c:2766 [inline]
 __se_sys_sendmmsg net/socket.c:2763 [inline]
 __x64_sys_sendmmsg+0xa0/0xb0 net/socket.c:2763
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f04fb13a6b9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 01 1a 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd651f42d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f04fb13a6b9
RDX: 0000000000000001 RSI: 0000000020000d00 RDI: 0000000000000004
RBP: 00007ffd651f4310 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000020000080 R11: 0000000000000246 R12: 00000000000f4240
R13: 00007f04fb187449 R14: 00007ffd651f42f4 R15: 00007ffd651f4300
 </TASK>

final repro crashed as (corrupted=false):
============================================
WARNING: possible recursive locking detected
6.11.0-rc6-syzkaller-00019-g67784a74e258 #0 Not tainted
--------------------------------------------
syz-executor364/5113 is trying to acquire lock:
ffff8880449f1958 (k-slock-AF_INET){+.-.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline]
ffff8880449f1958 (k-slock-AF_INET){+.-.}-{2:2}, at: sk_clone_lock+0x2cd/0xf40 net/core/sock.c:2328

but task is already holding lock:
ffff88803fe3cb58 (k-slock-AF_INET){+.-.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline]
ffff88803fe3cb58 (k-slock-AF_INET){+.-.}-{2:2}, at: sk_clone_lock+0x2cd/0xf40 net/core/sock.c:2328

other info that might help us debug this:
 Possible unsafe locking scenario:

       CPU0
       ----
  lock(k-slock-AF_INET);
  lock(k-slock-AF_INET);

 *** DEADLOCK ***

 May be due to missing lock nesting notation

7 locks held by syz-executor364/5113:
 #0: ffff8880449f0e18 (sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1607 [inline]
 #0: ffff8880449f0e18 (sk_lock-AF_INET){+.+.}-{0:0}, at: mptcp_sendmsg+0x153/0x1b10 net/mptcp/protocol.c:1806
 #1: ffff88803fe39ad8 (k-sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1607 [inline]
 #1: ffff88803fe39ad8 (k-sk_lock-AF_INET){+.+.}-{0:0}, at: mptcp_sendmsg_fastopen+0x11f/0x530 net/mptcp/protocol.c:1727
 #2: ffffffff8e938320 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
 #2: ffffffff8e938320 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
 #2: ffffffff8e938320 (rcu_read_lock){....}-{1:2}, at: __ip_queue_xmit+0x5f/0x1b80 net/ipv4/ip_output.c:470
 #3: ffffffff8e938320 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
 #3: ffffffff8e938320 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
 #3: ffffffff8e938320 (rcu_read_lock){....}-{1:2}, at: ip_finish_output2+0x45f/0x1390 net/ipv4/ip_output.c:228
 #4: ffffffff8e938320 (rcu_read_lock){....}-{1:2}, at: local_lock_acquire include/linux/local_lock_internal.h:29 [inline]
 #4: ffffffff8e938320 (rcu_read_lock){....}-{1:2}, at: process_backlog+0x33b/0x15b0 net/core/dev.c:6104
 #5: ffffffff8e938320 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
 #5: ffffffff8e938320 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
 #5: ffffffff8e938320 (rcu_read_lock){....}-{1:2}, at: ip_local_deliver_finish+0x230/0x5f0 net/ipv4/ip_input.c:232
 #6: ffff88803fe3cb58 (k-slock-AF_INET){+.-.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline]
 #6: ffff88803fe3cb58 (k-slock-AF_INET){+.-.}-{2:2}, at: sk_clone_lock+0x2cd/0xf40 net/core/sock.c:2328

stack backtrace:
CPU: 0 UID: 0 PID: 5113 Comm: syz-executor364 Not tainted 6.11.0-rc6-syzkaller-00019-g67784a74e258 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:93 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119
 check_deadlock kernel/locking/lockdep.c:3061 [inline]
 validate_chain+0x15d3/0x5900 kernel/locking/lockdep.c:3855
 __lock_acquire+0x137a/0x2040 kernel/locking/lockdep.c:5142
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5759
 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
 _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
 spin_lock include/linux/spinlock.h:351 [inline]
 sk_clone_lock+0x2cd/0xf40 net/core/sock.c:2328
 mptcp_sk_clone_init+0x32/0x13c0 net/mptcp/protocol.c:3279
 subflow_syn_recv_sock+0x931/0x1920 net/mptcp/subflow.c:874
 tcp_check_req+0xfe4/0x1a20 net/ipv4/tcp_minisocks.c:853
 tcp_v4_rcv+0x1c3e/0x37f0 net/ipv4/tcp_ipv4.c:2267
 ip_protocol_deliver_rcu+0x22e/0x440 net/ipv4/ip_input.c:205
 ip_local_deliver_finish+0x341/0x5f0 net/ipv4/ip_input.c:233
 NF_HOOK+0x3a4/0x450 include/linux/netfilter.h:314
 NF_HOOK+0x3a4/0x450 include/linux/netfilter.h:314
 __netif_receive_skb_one_core net/core/dev.c:5661 [inline]
 __netif_receive_skb+0x2bf/0x650 net/core/dev.c:5775
 process_backlog+0x662/0x15b0 net/core/dev.c:6108
 __napi_poll+0xcb/0x490 net/core/dev.c:6772
 napi_poll net/core/dev.c:6841 [inline]
 net_rx_action+0x89b/0x1240 net/core/dev.c:6963
 handle_softirqs+0x2c4/0x970 kernel/softirq.c:554
 do_softirq+0x11b/0x1e0 kernel/softirq.c:455
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0x1bb/0x200 kernel/softirq.c:382
 local_bh_enable include/linux/bottom_half.h:33 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:908 [inline]
 __dev_queue_xmit+0x1763/0x3e90 net/core/dev.c:4450
 dev_queue_xmit include/linux/netdevice.h:3105 [inline]
 neigh_hh_output include/net/neighbour.h:526 [inline]
 neigh_output include/net/neighbour.h:540 [inline]
 ip_finish_output2+0xd41/0x1390 net/ipv4/ip_output.c:235
 ip_local_out net/ipv4/ip_output.c:129 [inline]
 __ip_queue_xmit+0x118c/0x1b80 net/ipv4/ip_output.c:535
 __tcp_transmit_skb+0x2544/0x3b30 net/ipv4/tcp_output.c:1466
 tcp_rcv_synsent_state_process net/ipv4/tcp_input.c:6542 [inline]
 tcp_rcv_state_process+0x2c32/0x4570 net/ipv4/tcp_input.c:6729
 tcp_v4_do_rcv+0x77d/0xc70 net/ipv4/tcp_ipv4.c:1934
 sk_backlog_rcv include/net/sock.h:1111 [inline]
 __release_sock+0x214/0x350 net/core/sock.c:3004
 release_sock+0x61/0x1f0 net/core/sock.c:3558
 mptcp_sendmsg_fastopen+0x1ad/0x530 net/mptcp/protocol.c:1733
 mptcp_sendmsg+0x1884/0x1b10 net/mptcp/protocol.c:1812
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x1a6/0x270 net/socket.c:745
 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2597
 ___sys_sendmsg net/socket.c:2651 [inline]
 __sys_sendmmsg+0x3b2/0x740 net/socket.c:2737
 __do_sys_sendmmsg net/socket.c:2766 [inline]
 __se_sys_sendmmsg net/socket.c:2763 [inline]
 __x64_sys_sendmmsg+0xa0/0xb0 net/socket.c:2763
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f04fb13a6b9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 01 1a 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd651f42d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f04fb13a6b9
RDX: 0000000000000001 RSI: 0000000020000d00 RDI: 0000000000000004
RBP: 00007ffd651f4310 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000020000080 R11: 0000000000000246 R12: 00000000000f4240
R13: 00007f04fb187449 R14: 00007ffd651f42f4 R15: 00007ffd651f4300
 </TASK>