syz_io_uring_setup(0x27c1, &(0x7f0000000040), &(0x7f0000ffa000/0x4000)=nil, &(0x7f0000ffb000/0x3000)=nil, &(0x7f00000000c0)=<r0=>0x0, &(0x7f0000000100)=<r1=>0x0)
syz_io_uring_submit(r0, r1, &(0x7f0000002c00)=@IORING_OP_RECVMSG={0xa, 0x0, 0x0, 0xffffffffffffffff, 0x0, &(0x7f0000002bc0)={&(0x7f0000000580)=@pppol2tpv3in6={0x18, 0x1, {0x0, <r2=>0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0, {0xa, 0x0, 0x0, @mcast2}}}, 0x80, 0x0}}, 0x0)
r3 = dup(r2)
mmap$IORING_OFF_SQ_RING(&(0x7f0000ffa000/0x4000)=nil, 0x4000, 0x0, 0x13, r3, 0x0)