panic: kernel diagnostic assertion "sc->sc_dev == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/net/if_tun.c", line 303 Starting stack trace... panic(ffffffff825a0ade) at panic+0x16b sys/kern/subr_prf.c:233 __assert(ffffffff82618a25,ffffffff8265eee0,12f,ffffffff82629347) at __assert+0x25 sys/kern/subr_prf.c:161 tun_clone_destroy(ffff800000bfd800) at tun_clone_destroy+0x278 sys/net/if_tun.c:303 if_clone_destroy(ffff80002e5a4070) at if_clone_destroy+0x132 sys/net/if.c:1276 soo_ioctl(fffffd806c4c11e8,80206979,ffff80002e5a4070,ffff8000261c6548) at soo_ioctl+0x26c sys_ioctl(ffff8000261c6548,ffff80002e5a4188,ffff80002e5a41d0) at sys_ioctl+0x4a2 syscall(ffff80002e5a4250) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002e5a4250) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x12fe4a9d710, count: 249 End of stack trace.