login: witness: lock order reversal: 1st 0xffffffff82981660 pf_lock (pf_lock) 2nd 0xffffffff8291bdd0 netlock (netlock) lock order "netlock"(rwlock) -> "pf_lock"(rwlock) first seen at: #0 rw_enter_write+0x5b sys/kern/kern_rwlock.c:128 #1 pfioctl+0x3fba sys/net/pf_ioctl.c:2966 #2 VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 #3 vn_ioctl+0xbc sys/kern/vfs_vnops.c:531 #4 sys_ioctl+0x4a2 #5 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #5 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #6 Xsyscall+0x128 lock order "pf_lock"(rwlock) -> "netlock"(rwlock) first seen at: #0 rw_enter_write+0x5b sys/kern/kern_rwlock.c:128 #1 uvn_io+0x418 sys/uvm/uvm_vnode.c:1243 #2 uvn_get+0x1df sys/uvm/uvm_vnode.c:1076 #3 uvm_fault_lower+0x36c sys/uvm/uvm_fault.c:1275 #4 uvm_fault+0x248 #5 kpageflttrap+0x209 #6 kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 #7 alltraps_kern_meltdown+0x7b #8 copyin+0x53 #9 VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 #10 vn_ioctl+0xbc sys/kern/vfs_vnops.c:531 #11 sys_ioctl+0x4a2 #12 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #12 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #13 Xsyscall+0x128 Stopped at db_enter+0x18: addq $0x8,%rsp ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 witness_checkorder(ffffffff8291bdd0,9,0) at witness_checkorder+0x10b7 witness_debugger sys/kern/subr_witness.c:2502 [inline] witness_checkorder(ffffffff8291bdd0,9,0) at witness_checkorder+0x10b7 sys/kern/subr_witness.c:1105 rw_enter_write(ffffffff8291bdc0) at rw_enter_write+0x5b sys/kern/kern_rwlock.c:128 uvn_io(fffffd806d66d790,ffff8000211cd938,1,202,0) at uvn_io+0x418 sys/uvm/uvm_vnode.c:1243 uvn_get(fffffd806d66d790,1000,ffff8000211cd9f8,ffff8000211cd9c8,0,1,71fb8b939eed8b75,0) at uvn_get+0x1df sys/uvm/uvm_vnode.c:1076 uvm_fault_lower(ffff8000211cdb60,ffff8000211cdb98,ffff8000211cdae0,0) at uvm_fault_lower+0x36c sys/uvm/uvm_fault.c:1275 uvm_fault(fffffd806f1efe68,20001000,0,1) at uvm_fault+0x248 kpageflttrap(ffff8000211cdcf0,20001000) at kpageflttrap+0x209 kerntrap(ffff8000211cdcf0) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyin() at copyin+0x53 VOP_IOCTL(fffffd806f8159c8,c0104451,ffff8000211ce0d0,2,fffffd807f7d8960,ffff8000ffff6a90) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806e51a860,c0104451,ffff8000211ce0d0,ffff8000ffff6a90) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:531 sys_ioctl(ffff8000ffff6a90,ffff8000211ce1e8,ffff8000211ce240) at sys_ioctl+0x4a2 syscall(ffff8000211ce2b0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000211ce2b0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffbec30, count: -16 ddb{0}> show registers rdi 0x3 rsi 0xffffffff8294d790 __sancov_gen_cov_switch_values.134 rbp 0xffff8000211cd700 rbx 0x3 rdx 0x3fd rcx 0 rax 0x1 r8 0xffff8000211cd670 r9 0x8080808080808080 r10 0x38bdf05f4bfbb50 r11 0x17ac1df0a447fe87 r12 0xffffffff82adbf70 w_lodata+0x52800 r13 0 r14 0xffffffff82ad89d0 w_lodata+0x4f260 r15 0xfffffd8002f60780 rip 0xffffffff81395b28 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff8000211cd6f0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor3073947665) pid=134615 stat=onproc flags process=2 proc=0 pri=17, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff62b0,0xffffffff82af99a8 process=0xffff8000211a0010 user=0xffff8000211c9000, vmspace=0xfffffd806f1efe68 estcpu=0, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND *64312 134615 31587 0 7 0x2 syz-executor3073947665 31587 289449 44521 0 3 0x10008a sigsusp ksh 44521 297979 22700 0 3 0x9a kqread sshd 17075 25490 1 0 3 0x100083 ttyin getty 22700 175702 1 0 3 0x88 kqread sshd 14436 278851 62179 74 3 0x1100092 bpf pflogd 62179 369652 1 0 3 0x80 netio pflogd 78047 417736 38822 73 3 0x1100090 kqread syslogd 38822 174128 1 0 3 0x100082 netio syslogd 71221 218432 1 0 3 0x100080 kqread resolvd 84822 272576 73574 77 3 0x100092 kqread dhcpleased 6677 237660 73574 77 3 0x100092 kqread dhcpleased 73574 344477 1 0 3 0x80 kqread dhcpleased 68020 305756 0 0 3 0x14200 bored smr 34372 179053 0 0 3 0x14200 pgzero zerothread 32195 425231 0 0 3 0x14200 aiodoned aiodoned 14149 376999 0 0 3 0x14200 syncer update 72890 77747 0 0 3 0x14200 cleaner cleaner 43277 383154 0 0 3 0x14200 reaper reaper 37625 457917 0 0 3 0x14200 pgdaemon pagedaemon 86144 197469 0 0 3 0x14200 bored viomb 38268 469731 0 0 3 0x40014200 acpi0 acpi0 97997 267316 0 0 7 0x40014200 idle1 38004 330148 0 0 3 0x14200 bored softnet 61483 190397 0 0 3 0x14200 bored systqmp 59157 92360 0 0 3 0x14200 bored systq 48065 42089 0 0 3 0x40014200 bored softclock 78209 39519 0 0 3 0x40014200 idle0 1 152114 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 64312 (syz-executor3073947665) thread 0xffff8000ffff6a90 (134615) exclusive rwlock pf_lock r = 0 (0xffffffff82981660) #0 witness_lock+0x44d #1 pfioctl+0x413b sys/net/pf_ioctl.c:2476 #2 VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 #3 vn_ioctl+0xbc sys/kern/vfs_vnops.c:531 #4 sys_ioctl+0x4a2 #5 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #5 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #6 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82a17948) #0 witness_lock+0x44d #1 vn_ioctl+0x41 sys/kern/vfs_vnops.c:514 #2 sys_ioctl+0x4a2 #3 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #3 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #4 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10149 6454K 6455K 78643K 11239 0 pcb 13 8K 8K 78643K 13 0 rtable 62 2K 2K 78643K 112 0 ifaddr 29 8K 8K 78643K 32 0 counters 40 33K 33K 78643K 40 0 ioctlops 0 0K 4K 78643K 1479 0 iov 0 0K 0K 78643K 1 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1167 73K 73K 78643K 1180 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 1K 78643K 2 0 VM map 2 1K 1K 78643K 2 0 sem 2 0K 0K 78643K 2 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 1 0K 0K 78643K 1 0 proc 67 87K 87K 78643K 282 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 in_multi 11 0K 0K 78643K 11 0 ether_multi 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 25 122K 122K 78643K 25 0 exec 0 0K 2K 78643K 432 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 82 3K 5K 78643K 2179 0 UVM aobj 3 2K 2K 78643K 3 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 4 0K 0K 78643K 4 0 temp 26 4698K 4757K 78643K 3281 0 kqueue 11 16K 18K 78643K 24 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 17 0 14 1 0 1 1 0 8 0 rtentry 112 23 0 1 1 0 1 1 0 8 0 unpcb 136 35 0 20 1 0 1 1 0 8 0 syncache 296 5 0 5 1 0 1 1 0 8 1 tcpcb 736 8 0 5 1 0 1 1 0 8 0 arp 120 2 0 0 1 0 1 1 0 8 0 inpcb 304 32 0 26 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 9 0 0 1 0 1 1 0 8 0 pfstkey 112 9 0 0 1 0 1 1 0 8 0 pfstate 320 9 0 0 1 0 1 1 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 96 0 0 6 0 6 6 0 8 0 art_table 32 97 0 0 1 0 1 1 0 8 0 art_node 16 22 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1425 0 39 87 0 87 87 0 8 0 ffsino 272 1425 0 39 93 0 93 93 0 8 0 nchpl 144 1600 0 49 58 0 58 58 0 8 0 uvmvnodes 80 1435 0 0 30 0 30 30 0 8 0 vnodes 224 1435 0 0 85 0 85 85 0 8 0 namei 1024 4425 0 4425 1 0 1 1 0 8 1 percpumem 16 32 0 0 1 0 1 1 0 8 0 scxspl 216 3824 0 3822 2 1 1 2 0 8 0 plimitpl 152 16 0 9 1 0 1 1 0 8 0 sigapl 424 320 0 291 4 0 4 4 0 8 0 knotepl 120 52 0 0 2 0 2 2 0 8 0 kqueuepl 216 20 0 13 1 0 1 1 0 8 0 pipepl 336 86 0 83 1 0 1 1 0 8 0 fdescpl 496 306 0 291 3 0 3 3 0 8 0 filepl 152 1148 0 1087 3 0 3 3 0 8 0 lockfpl 104 6 0 4 1 0 1 1 0 8 0 lockfspl 48 4 0 2 1 0 1 1 0 8 0 sessionpl 144 18 0 9 1 0 1 1 0 8 0 pgrppl 48 18 0 9 1 0 1 1 0 8 0 ucredpl 96 69 0 57 1 0 1 1 0 8 0 zombiepl 144 291 0 291 1 0 1 1 0 8 1 processpl 1064 320 0 291 3 0 3 3 0 8 0 procpl 672 320 0 291 3 0 3 3 0 8 0 sockpl 480 84 0 60 4 0 4 4 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 57 0 0 8 0 8 8 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 105 0 0 7 0 7 7 0 8 0 bufpl 288 2024 0 93 138 0 138 138 0 8 0 anonpl 24 41240 0 38925 17 2 15 17 0 186 1 amapchunkpl 152 3965 0 3822 7 1 6 7 0 158 0 amappl16 200 34 0 33 2 1 1 1 0 8 0 amappl15 192 67 0 64 1 0 1 1 0 8 0 amappl13 176 34 0 33 1 0 1 1 0 8 0 amappl12 168 19 0 18 1 0 1 1 0 8 0 amappl11 160 49 0 35 1 0 1 1 0 8 0 amappl10 152 2 0 0 1 0 1 1 0 8 0 amappl9 144 442 0 439 1 0 1 1 0 8 0 amappl8 136 370 0 367 1 0 1 1 0 8 0 amappl7 128 65 0 62 1 0 1 1 0 8 0 amappl6 120 116 0 103 1 0 1 1 0 8 0 amappl5 112 189 0 175 1 0 1 1 0 8 0 amappl4 104 642 0 622 1 0 1 1 0 8 0 amappl3 96 121 0 112 1 0 1 1 0 8 0 amappl2 88 369 0 331 1 0 1 1 0 8 0 amappl1 80 8804 0 8423 9 0 9 9 0 8 0 amappl 88 1898 0 1834 2 0 2 2 0 92 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 253 0 253 1 1 0 1 0 8 0 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 306 0 291 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 306 0 291 1 0 1 1 0 8 0 vmmpekpl 168 6250 0 6235 1 0 1 1 0 8 0 vmmpepl 168 26576 0 25733 41 0 41 41 0 357 3 vmsppl 368 305 0 291 2 0 2 2 0 8 0 rwobjpl 56 9581 0 7588 29 0 29 29 0 8 0 pdppl 4096 619 0 582 51 14 37 45 0 8 0 pvpl 32 134486 0 130337 37 0 37 37 0 265 2 pmappl 248 305 0 291 2 0 2 2 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 406 0 17 12 0 12 12 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 witness_checkorder(ffffffff8291bdd0,9,0) at witness_checkorder+0x10b7 witness_debugger sys/kern/subr_witness.c:2502 [inline] witness_checkorder(ffffffff8291bdd0,9,0) at witness_checkorder+0x10b7 sys/kern/subr_witness.c:1105 rw_enter_write(ffffffff8291bdc0) at rw_enter_write+0x5b sys/kern/kern_rwlock.c:128 uvn_io(fffffd806d66d790,ffff8000211cd938,1,202,0) at uvn_io+0x418 sys/uvm/uvm_vnode.c:1243 uvn_get(fffffd806d66d790,1000,ffff8000211cd9f8,ffff8000211cd9c8,0,1,71fb8b939eed8b75,0) at uvn_get+0x1df sys/uvm/uvm_vnode.c:1076 uvm_fault_lower(ffff8000211cdb60,ffff8000211cdb98,ffff8000211cdae0,0) at uvm_fault_lower+0x36c sys/uvm/uvm_fault.c:1275 uvm_fault(fffffd806f1efe68,20001000,0,1) at uvm_fault+0x248 kpageflttrap(ffff8000211cdcf0,20001000) at kpageflttrap+0x209 kerntrap(ffff8000211cdcf0) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyin() at copyin+0x53 VOP_IOCTL(fffffd806f8159c8,c0104451,ffff8000211ce0d0,2,fffffd807f7d8960,ffff8000ffff6a90) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806e51a860,c0104451,ffff8000211ce0d0,ffff8000ffff6a90) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:531 sys_ioctl(ffff8000ffff6a90,ffff8000211ce1e8,ffff8000211ce240) at sys_ioctl+0x4a2 syscall(ffff8000211ce2b0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000211ce2b0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffbec30, count: -16 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff800020ce8ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800020ce8ff0) at sched_idle+0x417 sys/kern/kern_sched.c:178 end trace frame: 0x0, count: -5 ddb{1}>