*cpu1: uvm_fault(0xffffffff8287ed30, 0xffff800020cdf004, 0, 1) -> d ddb{0}> trace proc_trampoline() at proc_trampoline+0xdc end of kernel end trace frame: 0xc007a43ab0, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff800021263a70 rbx 0 rdx 0x8b rcx 0x2 rax 0x2a r8 0xffffffff820fdac4 kprintf+0x144 r9 0x1 r10 0x75402d0992e44e02 r11 0xd00100cf96220bf3 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff812cc50c proc_trampoline+0xdc cs 0x8 rflags 0x246 rsp 0xffff8000212639f0 ss 0 proc_trampoline+0xdc: movl $0,%gs:0x538 ddb{0}> show proc PROC (syz-fuzzer) pid=181610 stat=onproc flags process=2 proc=4000000 pri=24, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800021257a40,0xffff800021257270 process=0xffff80002120b250 user=0xffff80002125e000, vmspace=0xfffffd806f199008 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 87991 126616 97052 0 7 0x2 syz-executor.1 59466 487348 97052 0 3 0x82 piperd syz-executor.0 97052 507577 38948 0 3 0x82 thrsleep syz-fuzzer 97052 492846 38948 0 3 0x4000082 nanoslp syz-fuzzer 97052 163059 38948 0 3 0x4000082 nanoslp syz-fuzzer 97052 393473 38948 0 3 0x4000082 thrsleep syz-fuzzer 97052 20834 38948 0 3 0x4000082 thrsleep syz-fuzzer *97052 181610 38948 0 7 0x4000002 syz-fuzzer 97052 90659 38948 0 3 0x4000082 thrsleep syz-fuzzer 97052 400814 38948 0 3 0x4000082 thrsleep syz-fuzzer 38948 521345 74859 0 3 0x10008a sigsusp ksh 74859 333870 21912 0 3 0x9a select sshd 95101 143419 1 0 3 0x100083 ttyin getty 21912 123225 1 0 3 0x88 select sshd 68080 179262 44525 74 3 0x100092 bpf pflogd 44525 236425 1 0 3 0x80 netio pflogd 943 203251 24857 73 3 0x100010 biowait syslogd 24857 252452 1 0 3 0x100082 netio syslogd 43748 62879 1 0 3 0x100080 kqread resolvd 32939 300225 30555 77 3 0x100092 kqread dhcpleased 65529 220786 30555 77 3 0x100092 kqread dhcpleased 30555 371845 1 0 3 0x80 kqread dhcpleased 10055 100761 0 0 3 0x14200 bored smr 31413 86588 0 0 3 0x14200 pgzero zerothread 26938 443056 0 0 3 0x14200 aiodoned aiodoned 43657 484738 0 0 3 0x14200 syncer update 65286 150470 0 0 3 0x14200 cleaner cleaner 70431 509955 0 0 3 0x14200 reaper reaper 29348 341615 0 0 3 0x14200 pgdaemon pagedaemon 66207 64138 0 0 3 0x14200 bored crynlk 75528 239053 0 0 3 0x14200 bored crypto 28263 261671 0 0 3 0x14200 bored viomb 5378 364045 0 0 3 0x40014200 acpi0 acpi0 76693 363935 0 0 3 0x40014200 idle1 53918 453206 0 0 3 0x14200 bored softnet 88255 186518 0 0 3 0x14200 bored systqmp 85923 242117 0 0 3 0x14200 bored systq 6443 319521 0 0 3 0x40014200 bored softclock 46420 504678 0 0 3 0x40014200 idle0 1 457188 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex pvpl r = 0 (0xffffffff82845910) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pool_put+0x8a sys/kern/subr_pool.c:799 #4 pmap_enter+0x7f6 sys/arch/amd64/amd64/pmap.c:2851 #5 uvm_fault_upper+0x2ae sys/uvm/uvm_fault.c:1033 #6 uvm_fault+0x164 sys/uvm/uvm_fault.c:609 #7 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #8 usertrap+0x214 sys/arch/amd64/amd64/trap.c:403 #9 recall_trap+0x8 Process 87991 (syz-executor.1) thread 0xffff8000212562a0 (126616) exclusive rrwlock inode r = 0 (0xfffffd80653f0b40) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 rw_enter+0x3e2 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:614 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:579 #5 vfs_lookup+0xdd sys/kern/vfs_lookup.c:413 #6 namei+0x55a sys/kern/vfs_lookup.c:245 #7 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1854 #8 syscall+0x5a9 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x5a9 sys/arch/amd64/amd64/trap.c:587 #9 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 1 (0xffffffff828cdd58) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 syscall+0x42d mi_syscall sys/sys/syscall_mi.h:93 [inline] #1 syscall+0x42d sys/arch/amd64/amd64/trap.c:587 #2 Xsyscall+0x128 Process 97052 (syz-fuzzer) thread 0xffff8000212577a0 (181610) exclusive rwlock amaplk r = 0 (0xfffffd8068901590) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 uvm_fault_check+0x3d2 sys/uvm/uvm_fault.c:774 #2 uvm_fault+0x102 sys/uvm/uvm_fault.c:601 #3 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #4 usertrap+0x214 sys/arch/amd64/amd64/trap.c:403 #5 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd806f199020) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1701 #2 uvm_fault_check+0x3a sys/uvm/uvm_fault.c:674 #3 uvm_fault+0x102 sys/uvm/uvm_fault.c:601 #4 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #5 usertrap+0x214 sys/arch/amd64/amd64/trap.c:403 #6 recall_trap+0x8 exclusive mutex pvpl r = 0 (0xffffffff82845910) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pool_put+0x8a sys/kern/subr_pool.c:799 #4 pmap_enter+0x7f6 sys/arch/amd64/amd64/pmap.c:2851 #5 uvm_fault_upper+0x2ae sys/uvm/uvm_fault.c:1033 #6 uvm_fault+0x164 sys/uvm/uvm_fault.c:609 #7 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #8 usertrap+0x214 sys/arch/amd64/amd64/trap.c:403 #9 recall_trap+0x8 Process 943 (syslogd) thread 0xffff800021193268 (203251) exclusive rrwlock inode r = 0 (0xfffffd806e61f2c0) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 rw_enter+0x3e2 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:614 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:579 #5 sys_fsync+0x113 sys/kern/vfs_syscalls.c:2893 #6 syscall+0x5a9 mi_syscall sys/sys/syscall_mi.h:102 [inline] #6 syscall+0x5a9 sys/arch/amd64/amd64/trap.c:587 #7 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10123 6429K 6558K 78643K 11651 0 pcb 13 8K 8K 78643K 21 0 rtable 106 3K 3K 78643K 232 0 ifaddr 44 10K 10K 78643K 60 0 counters 44 34K 34K 78643K 48 0 ioctlops 0 0K 4K 78643K 1489 0 iov 0 0K 0K 78643K 8 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 6 0 vnodes 1218 77K 77K 78643K 1266 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 10 0 VM map 2 1K 1K 78643K 2 0 sem 12 1K 1K 78643K 64 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 4 9K 25K 78643K 22996 0 proc 69 87K 111K 78643K 407 0 subproc 32 2K 2K 78643K 68 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 in_multi 33 2K 2K 78643K 55 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 37 175K 175K 78643K 37 0 exec 0 0K 2K 78643K 452 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 341 40K 41K 78643K 273076 0 UVM aobj 7 2K 2K 78643K 7 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 8 0K 0K 78643K 16 0 temp 71 4197K 4261K 78643K 48532 0 kqueue 10 14K 14K 78643K 10 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 29 0 26 1 0 1 1 0 8 0 rtentry 112 67 0 23 2 0 2 2 0 8 0 unpcb 120 12449 0 12434 1 0 1 1 0 8 0 syncache 296 4 0 4 1 1 0 1 0 8 0 tcpqe 32 749 0 749 3 3 0 2 0 8 0 tcpcb 736 19 0 15 1 0 1 1 0 8 0 arp 120 10 0 4 1 0 1 1 0 8 0 inpcb 304 69 0 62 1 0 1 1 0 8 0 nd6 48 12 0 6 1 0 1 1 0 8 0 kcovpl 48 4 0 2 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 15 0 11 1 0 1 1 0 8 0 pfstkey 112 15 0 11 1 0 1 1 0 8 0 pfstate 320 15 0 11 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 256 276 0 88 12 0 12 12 0 8 0 art_table 32 277 0 88 2 0 2 2 0 8 0 art_node 16 66 0 26 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 62 0 52 1 0 1 1 0 8 0 shmpl 112 4 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 28256 0 26840 89 0 89 89 0 8 0 ffsino 272 28256 0 26840 95 0 95 95 0 8 0 nchpl 144 55893 0 54284 61 0 61 61 0 8 0 uvmvnodes 72 5926 0 0 108 0 108 108 0 8 0 vnodes 224 5926 0 0 349 0 349 349 0 8 0 namei 1024 119328 0 119327 2 1 1 1 0 8 0 percpumem 16 36 0 2 1 0 1 1 0 8 0 scxspl 216 154565 0 154564 10 9 1 8 0 8 0 plimitpl 152 19 0 10 1 0 1 1 0 8 0 sigapl 424 23240 0 23207 6 2 4 5 0 8 0 futexpl 56 104923 0 104923 1 0 1 1 0 8 1 knotepl 112 58 0 0 2 0 2 2 0 8 0 kqueuepl 216 33915 0 33909 8 7 1 2 0 8 0 pipepl 336 102 0 92 4 2 2 2 0 8 1 fdescpl 496 23224 0 23207 3 0 3 3 0 8 0 filepl 152 84792 0 84680 15 10 5 6 0 8 0 lockfpl 104 49 0 47 1 0 1 1 0 8 0 lockfspl 48 22 0 20 1 0 1 1 0 8 0 sessionpl 144 20 0 9 1 0 1 1 0 8 0 pgrppl 48 20 0 9 1 0 1 1 0 8 0 ucredpl 96 1886 0 1873 1 0 1 1 0 8 0 zombiepl 144 23207 0 23207 2 1 1 1 0 8 1 processpl 1072 23240 0 23207 3 0 3 3 0 8 0 procpl 672 46762 0 46722 9 5 4 5 0 8 0 sockpl 480 12547 0 12522 13 9 4 5 0 8 0 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 6 0 0 1 0 1 1 0 8 0 mcl4k 4096 21 0 0 3 0 3 3 0 8 0 mcl2k2 2112 9 0 0 1 0 1 1 0 8 0 mcl2k 2048 338 0 0 34 5 29 34 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 733 0 0 21 0 21 21 0 8 0 bufpl 280 26484 0 20148 453 0 453 453 0 8 0 anonpl 24 5697011 0 5665963 254 13 241 241 0 186 2 amapchunkpl 152 636271 0 634913 69 11 58 58 0 158 2 amappl16 200 33376 0 32253 62 2 60 60 0 8 0 amappl15 192 11253 0 11252 1 0 1 1 0 8 0 amappl14 184 4 0 3 2 1 1 1 0 8 0 amappl13 176 42 0 41 1 0 1 1 0 8 0 amappl12 168 20 0 14 1 0 1 1 0 8 0 amappl11 160 56 0 41 1 0 1 1 0 8 0 amappl10 152 47 0 38 1 0 1 1 0 8 0 amappl9 144 11700 0 11697 1 0 1 1 0 8 0 amappl8 136 658 0 612 2 0 2 2 0 8 0 amappl7 128 315 0 301 1 0 1 1 0 8 0 amappl6 120 11605 0 11593 1 0 1 1 0 8 0 amappl5 112 23118 0 23098 1 0 1 1 0 8 0 amappl4 104 615 0 590 1 0 1 1 0 8 0 amappl3 96 54 0 50 1 0 1 1 0 8 0 amappl2 88 511 0 457 2 0 2 2 0 8 0 amappl1 80 384725 0 384298 14 4 10 13 0 8 0 amappl 88 268835 0 268566 8 1 7 7 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 64 6 0 0 1 0 1 1 0 8 0 uaddrrnd 24 23224 0 23207 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 23224 0 23207 1 0 1 1 0 8 0 vmmpekpl 168 99761 0 99738 2 0 2 2 0 8 0 vmmpepl 168 2565833 0 2563349 279 108 171 171 0 357 52 vmsppl 368 23223 0 23207 2 0 2 2 0 8 0 rwobjpl 56 420004 0 418003 36 6 30 30 0 8 1 pdppl 4096 46456 0 46414 74 28 46 50 0 8 4 pvpl 32 11315552 0 11281411 392 39 353 353 0 265 4 pmappl 224 23223 0 23207 2 0 2 2 0 8 0 extentpl 40 58 0 40 1 0 1 1 0 8 0 phpool 112 349 0 39 10 0 10 10 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace proc_trampoline() at proc_trampoline+0xdc end of kernel end trace frame: 0xc007a43ab0, count: -1 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020d38ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:353 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 x86_bus_space_io_write_1(3f8,0,30) at x86_bus_space_io_write_1+0x31 sys/arch/amd64/amd64/bus_space.c:759 comcnputc(800,30) at comcnputc+0x128 bus_space_barrier machine/bus.h:481 [inline] comcnputc(800,30) at comcnputc+0x128 sys/dev/ic/com.c:1263 cnputc(30) at cnputc+0x4b sys/dev/cons.c:239 db_putchar(30) at db_putchar+0x3fc sys/ddb/db_output.c:155 kprintf() at kprintf+0x1f19 sys/kern/subr_prf.c:1068 db_printf(ffffffff824f54a2) at db_printf+0x85 sys/kern/subr_prf.c:502 fault(ffffffff824a9a3b) at fault+0x95 sys/arch/amd64/amd64/trap.c:154 kpageflttrap(ffff80002229aeb0,ffff800020cdf004) at kpageflttrap+0x246 sys/arch/amd64/amd64/trap.c:275 kerntrap(ffff80002229aeb0) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b ufs_lookup() at ufs_lookup+0x4ea sys/ufs/ufs/ufs_lookup.c:281 end trace frame: 0xffff80002229b0f0, count: 0 ddb{1}> trace x86_ipi_db(ffff800020d38ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:353 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 x86_bus_space_io_write_1(3f8,0,30) at x86_bus_space_io_write_1+0x31 sys/arch/amd64/amd64/bus_space.c:759 comcnputc(800,30) at comcnputc+0x128 bus_space_barrier machine/bus.h:481 [inline] comcnputc(800,30) at comcnputc+0x128 sys/dev/ic/com.c:1263 cnputc(30) at cnputc+0x4b sys/dev/cons.c:239 db_putchar(30) at db_putchar+0x3fc sys/ddb/db_output.c:155 kprintf() at kprintf+0x1f19 sys/kern/subr_prf.c:1068 db_printf(ffffffff824f54a2) at db_printf+0x85 sys/kern/subr_prf.c:502 fault(ffffffff824a9a3b) at fault+0x95 sys/arch/amd64/amd64/trap.c:154 kpageflttrap(ffff80002229aeb0,ffff800020cdf004) at kpageflttrap+0x246 sys/arch/amd64/amd64/trap.c:275 kerntrap(ffff80002229aeb0) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b ufs_lookup() at ufs_lookup+0x4ea sys/ufs/ufs/ufs_lookup.c:281 VOP_LOOKUP(fffffd80784742b8,ffff80002229b2b0,ffff80002229b2e8) at VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:88 vfs_lookup(ffff80002229b280) at vfs_lookup+0x737 sys/kern/vfs_lookup.c:561 namei(ffff80002229b280) at namei+0x55a sys/kern/vfs_lookup.c:245 dounlinkat(ffff8000212562a0,ffffff9c,7f7ffffd0cd0,8) at dounlinkat+0x99 sys/kern/vfs_syscalls.c:1854 syscall(ffff80002229b460) at syscall+0x5a9 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002229b460) at syscall+0x5a9 sys/arch/amd64/amd64/trap.c:587 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd0cc0, count: -20