panic: trap type 4, code=0, pc=ffffffff817e55c5
Starting stack trace...
panic(ffffffff8278d177) at panic+0x16f sys/kern/subr_prf.c:229
kerntrap(ffff80002e403240) at kerntrap+0x1d7 sys/arch/amd64/amd64/trap.c:336
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
pool_do_put(ffffffff82c45168,fffffd807e8755d0) at pool_do_put+0x115
pool_put(ffffffff82c45168,fffffd807e8755d0) at pool_put+0x8f sys/kern/subr_pool.c:799
soclose(fffffd807e8755d0,0) at soclose+0x4ba sys/kern/uipc_socket.c:440
soo_close(fffffd805b8bc098,ffff800022cf6078) at soo_close+0x44
fdrop(fffffd805b8bc098,ffff800022cf6078) at fdrop+0xcb sys/kern/kern_descrip.c:1274
dofilereadv(ffff800022cf6078,4,ffff80002e4035d0,0,ffff80002e4036c0) at dofilereadv+0x330 sys/kern/sys_generic.c:268
sys_readv(ffff800022cf6078,ffff80002e403670,ffff80002e4036c0) at sys_readv+0xab sys/kern/sys_generic.c:194
syscall(ffff80002e403740) at syscall+0x606 mi_syscall sys/sys/syscall_mi.h:110 [inline]
syscall(ffff80002e403740) at syscall+0x606 sys/arch/amd64/amd64/trap.c:632
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x9c226e98530, count: 245
End of stack trace.
syncing disks...panic: kernel diagnostic assertion "!_kernel_lock_held()" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_fork.c", line 675
Starting stack trace...
panic(ffffffff82792e2a) at panic+0x16f sys/kern/subr_prf.c:229
__assert(ffffffff82813361,ffffffff827f896e,2a3,ffffffff827ca454) at __assert+0x29 sys/kern/subr_prf.c:157
proc_trampoline_mp() at proc_trampoline_mp+0x135
end trace frame: 0x0, count: 254
End of stack trace.

dump to dev 4,1 not possible