login: panic: vclean: deadlock
Starting stack trace...
panic(ffffffff830e3e0b) at panic+0x1d0 sys/kern/subr_prf.c:229
vclean(fffffd8070e6c990,8,ffff8000ffff27b8) at vclean+0x482 sys/kern/vfs_subr.c:1065
vgonel(fffffd8070e6c990,ffff8000ffff27b8) at vgonel+0xec sys/kern/vfs_subr.c:1197
vcount(fffffd8070e6c558) at vcount+0x179 sys/kern/vfs_subr.c:1298
spec_close(ffff80002a0f5ee0) at spec_close+0xb8 sys/kern/spec_vnops.c:480
VOP_CLOSE(fffffd8070e6c558,9,fffffd807f7d35b0,ffff8000ffff27b8) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156
vn_closefile(fffffd80622aa900,ffff8000ffff27b8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd80622aa900,ffff8000ffff27b8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:609
fdrop(fffffd80622aa900,ffff8000ffff27b8) at fdrop+0x126 sys/kern/kern_descrip.c:1274
closef(fffffd80622aa900,ffff8000ffff27b8) at closef+0x192 sys/kern/kern_descrip.c:1258
fdfree(ffff8000ffff27b8) at fdfree+0x116 sys/kern/kern_descrip.c:1190
exit1(ffff8000ffff27b8,0,0,1) at exit1+0x71b sys/kern/kern_exit.c:221
sys_exit(ffff8000ffff27b8,ffff80002a0f6260,ffff80002a0f61b0) at sys_exit+0x1a
syscall(ffff80002a0f6260) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline]
syscall(ffff80002a0f6260) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x78566be15d30, count: 243
End of stack trace.
syncing disks...panic: kernel diagnostic assertion "rw_write_held(uobj->vmobjlock)" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_vnode.c", line 609
Starting stack trace...
panic(ffffffff830d710a) at panic+0x1d0 sys/kern/subr_prf.c:229
__assert(ffffffff8308c51e,ffffffff82fcafb9,261,ffffffff8300994b) at __assert+0x29
uvn_flush(fffffd806cfa6b60,0,0,31) at uvn_flush+0xdfd sys/uvm/uvm_vnode.c:752
uvm_vnp_sync(ffff800000a66c00) at uvm_vnp_sync+0x1e7 sys/uvm/uvm_vnode.c:1540
sys_sync(ffff8000ffff27b8,0,0) at sys_sync+0xd4 sys/kern/vfs_syscalls.c:536
vfs_syncwait(ffff8000ffff27b8,1) at vfs_syncwait+0x44
vfs_shutdown(ffff8000ffff27b8) at vfs_shutdown+0x97 sys/kern/vfs_subr.c:1815
boot(100) at boot+0x143 sys/arch/amd64/amd64/machdep.c:901
reboot(100) at reboot+0xb1
panic(ffffffff830e3e0b) at panic+0x1f9 sys/kern/subr_prf.c:231
vclean(fffffd8070e6c990,8,ffff8000ffff27b8) at vclean+0x482 sys/kern/vfs_subr.c:1065
vgonel(fffffd8070e6c990,ffff8000ffff27b8) at vgonel+0xec sys/kern/vfs_subr.c:1197
vcount(fffffd8070e6c558) at vcount+0x179 sys/kern/vfs_subr.c:1298
spec_close(ffff80002a0f5ee0) at spec_close+0xb8 sys/kern/spec_vnops.c:480
VOP_CLOSE(fffffd8070e6c558,9,fffffd807f7d35b0,ffff8000ffff27b8) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156
vn_closefile(fffffd80622aa900,ffff8000ffff27b8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd80622aa900,ffff8000ffff27b8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:609
fdrop(fffffd80622aa900,ffff8000ffff27b8) at fdrop+0x126 sys/kern/kern_descrip.c:1274
closef(fffffd80622aa900,ffff8000ffff27b8) at closef+0x192 sys/kern/kern_descrip.c:1258
fdfree(ffff8000ffff27b8) at fdfree+0x116 sys/kern/kern_descrip.c:1190
exit1(ffff8000ffff27b8,0,0,1) at exit1+0x71b sys/kern/kern_exit.c:221
sys_exit(ffff8000ffff27b8,ffff80002a0f6260,ffff80002a0f61b0) at sys_exit+0x1a
syscall(ffff80002a0f6260) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline]
syscall(ffff80002a0f6260) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x78566be15d30, count: 234
End of stack trace.

dump to dev 4,1 not possible