login: panic: kmmaplk rwlock 0xffffffff83a69d10: enter read deadlock
Starting stack trace...
panic(ffffffff8342ec2c) at panic+0x1ba sys/kern/subr_prf.c:229
rw_do_enter_read(ffffffff83a69d10,0) at rw_do_enter_read+0x435 sys/kern/kern_rwlock.c:379
uvmfault_lookup(ffff80002a8a4df0,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1880
uvm_fault_check(ffff80002a8a4df0,ffff80002a8a4e28,ffff80002a8a4e60,0) at uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693
uvm_fault(ffffffff83a69c28,ffff800029ee6000,0,2) at uvm_fault+0xe6 sys/uvm/uvm_fault.c:627
kpageflttrap(ffff80002a8a4f90,ffff800029ee6000) at kpageflttrap+0x2d1 sys/arch/amd64/amd64/trap.c:-1
kerntrap(ffff80002a8a4f90) at kerntrap+0x18a sys/arch/amd64/amd64/trap.c:528
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
kcov_remote_enter(0,ffff80002a79f190) at kcov_remote_enter+0x122 sys/dev/kcov.c:670
timeout_run(ffffffff838a1da0,ffffffff83a26a50) at timeout_run+0xdf sys/kern/kern_timeout.c:696
softclock_process_tick_timeout(ffffffff83a26a50,0) at softclock_process_tick_timeout+0x230 sys/kern/kern_timeout.c:756
softclock(0) at softclock+0x152 sys/kern/kern_timeout.c:788
softintr_dispatch(0) at softintr_dispatch+0xf9 sys/kern/kern_softintr.c:87
dosoftint(0) at dosoftint+0x48 sys/arch/amd64/amd64/intr.c:862
Xsoftclock() at Xsoftclock+0x27
pmap_remove_ptes(ffffffff83a66e40,0,7fc0001d9000,ffff80003b200000,ffff80003b400000,0,dc15cdff92895330) at pmap_remove_ptes+0xe5 sys/arch/amd64/amd64/pmap.c:1673
pmap_do_remove(ffffffff83a66e40,ffff80003b0ca000,ffff80003b4ca000,0) at pmap_do_remove+0x53a sys/arch/amd64/amd64/pmap.c:1923
uvm_unmap_kill_entry_withlock(ffffffff83a69c28,fffffd807ec660a8,1) at uvm_unmap_kill_entry_withlock+0x269 sys/uvm/uvm_map.c:1869
uvm_unmap_remove(ffffffff83a69c28,ffff80003b0ca000,ffff80003b4ca000,ffff80002a8a5528,0,1,2b569814e1cf634) at uvm_unmap_remove+0x6c2 sys/uvm/uvm_map.c:2008
uvm_unmap(ffffffff83a69c28,ffff80003b0ca000,ffff80003b4ca000) at uvm_unmap+0xa7 vm_map_unlock_ln sys/uvm/uvm_map.c:-1 [inline]
uvm_unmap(ffffffff83a69c28,ffff80003b0ca000,ffff80003b4ca000) at uvm_unmap+0xa7 sys/uvm/uvm_map.c:1799
km_free(ffff80003b0ca000,400000,ffffffff838353b0,ffffffff83835498) at km_free+0x87 sys/uvm/uvm_km.c:714
kd_free(ffff8000015e5d80) at kd_free+0x84 sys/dev/kcov.c:564
kcovclose(431300,3,2000,ffff80002a736538) at kcovclose+0xe4 sys/dev/kcov.c:-1
spec_close(ffff80002a8a5700) at spec_close+0x466 sys/kern/spec_vnops.c:-1
VOP_CLOSE(fffffd806caa69a0,3,fffffd8007ffd7b8,ffff80002a736538) at VOP_CLOSE+0x129 sys/kern/vfs_vops.c:156
vn_closefile(fffffd806cab19e0,ffff80002a736538) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:298 [inline]
vn_closefile(fffffd806cab19e0,ffff80002a736538) at vn_closefile+0x11d sys/kern/vfs_vnops.c:621
fdrop(fffffd806cab19e0,ffff80002a736538) at fdrop+0x121 sys/kern/kern_descrip.c:1281
closef(fffffd806cab19e0,ffff80002a736538) at closef+0x190 sys/kern/kern_descrip.c:1265
fdfree(ffff80002a736538) at fdfree+0x115 sys/kern/kern_descrip.c:1196
exit1(ffff80002a736538,43,0,1) at exit1+0x576 sys/kern/kern_exit.c:215
sys_exit(ffff80002a736538,ffff80002a8a5a60,ffff80002a8a59b0) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80002a8a5a60) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80002a8a5a60) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7525f0745730, count: 224
End of stack trace.
WARNING: SPL NOT LOWERED ON SYSCALL 4 2 EXIT 0 9
Stopped at      savectx+0xae:   movl    $0,%gs:0x688
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
* 90426  11453      0         0x2          0    0  syz-executor
savectx() at savectx+0xae
end of kernel
end trace frame: 0x72ceb4cdc350, count: 14
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ddb> 
ddb> set $lines = 0
ddb> set $maxwidth = 0
ddb> show panic
*cpu0: kmmaplk rwlock 0xffffffff83a69d10: enter read deadlock
ddb>