syzbot

panic: trap type 4, code=0, pc=ffffffff82612ed1
Starting stack trace...
panic(ffffffff833adc44) at panic+0x1ba sys/kern/subr_prf.c:229
kerntrap(ffff80003c9810f0) at kerntrap+0x2fb
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
lf_advlock(ffff8000015ef660,0,fffffd806c996398,8,ffff80003c981310,50) at lf_advlock+0x2f1 ls_ref sys/kern/vfs_lockf.c:138 [inline]
lf_advlock(ffff8000015ef660,0,fffffd806c996398,8,ffff80003c981310,50) at lf_advlock+0x2f1 sys/kern/vfs_lockf.c:278
VOP_ADVLOCK(fffffd806635f530,fffffd806c996398,8,ffff80003c981310,50) at VOP_ADVLOCK+0x87 sys/kern/vfs_vops.c:623
sys_fcntl(ffff80002a788d20,ffff80003c981460,ffff80003c9813b0) at sys_fcntl+0x13e5 sys/arch/amd64/compile/SYZKALLER/obj/machine/atomic.h:-1
syscall(ffff80003c981460) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80003c981460) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xddf1a296d10, count: 249
End of stack trace.