*cpu1: uvm_fault(0xffffffff83541338, 0xffff8000013c7008, 0, 2) -> e ddb{0}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7658f19742c0, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80002a17e090 rbx 0 rdx 0 rcx 0xffff8000ffffc7a8 rax 0x2a r8 0xffff80002a17dfc0 r9 0x4 r10 0xd91123f1c9df1b49 r11 0x88ce8960b82f6847 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff81fdd4c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80002a17e010 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x680 ddb{0}> show proc PROC (syz-executor) tid=167837 pid=39579 tcnt=1 stat=onproc flags process=2 proc=0 runpri=17, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffffdbe8,0xffff8000ffffca40 process=0xffff8000ffff1240 user=0xffff80002a179000, vmspace=0xfffffd806c2d06e0 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 9905 60101 71374 32767 3 0x102010 suspend syz-executor 9905 319521 71374 32767 4 0x4182010 syz-executor 9905 180924 71374 32767 7 0x4182010 syz-executor 9905 377159 71374 32767 4 0x4182010 syz-executor *39579 167837 46639 0 7 0x2 syz-executor 61694 273420 0 0 3 0x14200 bored sosplice 98500 333449 94645 32767 3 0x90 nanoslp syz-executor 98500 124504 94645 32767 3 0x4000090 lockf syz-executor 98500 229520 94645 32767 3 0x4000090 fsleep syz-executor 63260 292617 18573 32767 3 0x90 nanoslp syz-executor 63260 253995 18573 32767 3 0x4000090 lockf syz-executor 63260 76082 18573 32767 3 0x4000090 fsleep syz-executor 17599 519879 90865 0 3 0x82 netio sshd-session 53652 302547 86948 32767 3 0x90 piperd syz-executor 86847 144965 83602 32767 3 0x90 piperd syz-executor 18573 438280 10020 32767 3 0x90 nanoslp syz-executor 90304 365909 71420 32767 3 0x90 piperd syz-executor 94645 341200 88296 32767 3 0x90 nanoslp syz-executor 71374 305243 38484 32767 3 0x90 nanoslp syz-executor 10020 455558 46639 0 3 0x82 wait syz-executor 86948 41854 46639 0 3 0x82 wait syz-executor 83602 230657 46639 0 3 0x82 wait syz-executor 71420 264542 46639 0 3 0x82 wait syz-executor 38484 313028 46639 0 3 0x82 wait syz-executor 88296 484240 46639 0 3 0x82 wait syz-executor 46639 474728 30412 0 3 0x82 nanoslp syz-executor 30412 456672 48410 0 3 0x10008a sigsusp ksh 48410 72334 30600 0 3 0x98 kqread sshd-session 30600 268925 90865 0 3 0x92 kqread sshd-session 5617 443265 1 0 3 0x100083 ttyin getty 90865 141525 1 0 3 0x88 kqread sshd 5814 420897 51022 73 3 0x1100090 kqread syslogd 51022 278554 1 0 3 0x100082 sbwait syslogd 99291 224973 1 0 3 0x100080 kqread resolvd 20418 354035 45042 77 3 0x100092 kqread dhcpleased 9838 265280 45042 77 3 0x100092 kqread dhcpleased 45042 505674 1 0 3 0x80 kqread dhcpleased 81988 171861 0 0 3 0x14200 bored smr 60129 270311 0 0 3 0x14200 pgzero zerothread 29030 511722 0 0 3 0x14200 aiodoned aiodoned 24313 466379 0 0 3 0x14200 syncer update 24559 332628 0 0 3 0x14200 cleaner cleaner 46500 78669 0 0 3 0x14200 reaper reaper 84312 25457 0 0 3 0x14200 pgdaemon pagedaemon 23914 116056 0 0 3 0x14200 bored viomb 84374 408077 0 0 3 0x40014200 acpi0 acpi0 93445 81915 0 0 3 0x40014200 idle1 89935 362007 0 0 3 0x14200 bored softnet3 64417 300624 0 0 3 0x14200 bored softnet2 20434 143427 0 0 3 0x14200 bored softnet1 5788 215435 0 0 3 0x14200 bored softnet0 6590 349353 0 0 3 0x14200 bored systqmp 2010 417974 0 0 3 0x14200 bored systq 38927 139626 0 0 3 0x14200 tmoslp softclockmp 51993 422686 0 0 3 0x40014200 tmoslp softclock 17547 91384 0 0 3 0x40014200 idle0 1 160273 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &uvm.pageqlock r = 0 (0xffffffff835a59c0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 mtx_enter_try+0x178 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 uvm_fault_lower_lookup+0x24c sys/uvm/uvm_fault.c:1171 #4 uvm_fault_lower+0x74 sys/uvm/uvm_fault.c:1227 #5 uvm_fault+0x301 sys/uvm/uvm_fault.c:637 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #7 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #8 recall_trap+0x8 Process 9905 (syz-executor) thread 0xffff80002a02dbf8 (180924) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8351ca88) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 __mp_acquire_count+0x58 #2 mi_switch+0x4b7 sys/kern/sched_bsd.c:441 #3 sleep_finish+0x21e sys/kern/kern_synch.c:416 #4 rw_enter+0x348 sys/kern/kern_rwlock.c:285 #5 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #6 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #7 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #8 vget+0x2bd sys/kern/vfs_subr.c:673 #9 ufs_ihashget+0x192 sys/ufs/ufs/ufs_ihash.c:98 #10 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1201 #11 ufs_lookup+0x1631 sys/ufs/ufs/ufs_lookup.c:555 #12 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #13 unveil_find_cover+0x16d sys/kern/kern_unveil.c:277 #14 unveil_add_vnode+0xd1 sys/kern/kern_unveil.c:391 #15 unveil_add+0x448 sys/kern/kern_unveil.c:494 #16 sys_unveil+0x60c sys/kern/vfs_syscalls.c:1020 #17 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] #17 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #18 Xsyscall+0x128 Process 39579 (syz-executor) thread 0xffff8000ffffc7a8 (167837) exclusive rwlock uobjlk r = 0 (0xfffffd806d66a440) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 uvm_fault_lower_lookup+0x54 sys/uvm/uvm_fault.c:1126 #3 uvm_fault_lower+0x74 sys/uvm/uvm_fault.c:1227 #4 uvm_fault+0x301 sys/uvm/uvm_fault.c:637 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #6 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #7 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd806c2d07d0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1785 #2 uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 #3 uvm_fault+0x112 sys/uvm/uvm_fault.c:600 #4 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #5 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #6 recall_trap+0x8 exclusive mutex &uvm.pageqlock r = 0 (0xffffffff835a59c0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 mtx_enter_try+0x178 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 uvm_fault_lower_lookup+0x24c sys/uvm/uvm_fault.c:1171 #4 uvm_fault_lower+0x74 sys/uvm/uvm_fault.c:1227 #5 uvm_fault+0x301 sys/uvm/uvm_fault.c:637 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #7 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #8 recall_trap+0x8 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10206 11046K 11059K 166960K 11292 0 pcb 17 12K 12K 166960K 17 0 rtable 192 5K 6K 166960K 364 0 pf 27 16K 16K 166960K 31 0 ifaddr 34 6K 7K 166960K 44 0 ifgroup 42 1K 2K 166960K 50 0 counters 60 35K 36K 166960K 64 0 ioctlops 0 0K 2K 166960K 30 0 iov 0 0K 3K 166960K 7 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1364 86K 86K 166960K 1989 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 7 0 VM map 2 1K 1K 166960K 2 0 sem 12 1K 1K 166960K 20 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 18 62K 125K 166960K 443 0 sigio 0 0K 0K 166960K 72 0 proc 58 79K 115K 166960K 485 0 subproc 78 4K 6K 166960K 585 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 27 0 in_multi 77 5K 7K 166960K 104 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 241 1076K 1076K 166960K 241 0 exec 0 0K 1K 166960K 397 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 210 56K 90K 166960K 4654 0 UVM aobj 13 2K 2K 166960K 13 0 pinsyscall 41 82K 110K 166960K 1488 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 16 0 NDP 9 0K 2K 166960K 27 0 temp 65 6819K 6885K 166960K 5397 0 kqueue 13 20K 30K 166960K 50 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 24 0 0 1 0 1 1 0 8 0 rtpcb 120 79 0 76 2 0 2 2 0 8 1 rtentry 112 114 0 25 4 0 4 4 0 8 0 unpcb 144 414 0 398 6 0 6 6 0 8 5 syncache 336 9 0 9 1 0 1 1 0 8 1 tcpqe 32 2 0 2 1 0 1 1 0 8 1 tcpcb 808 121 0 113 4 0 4 4 0 8 2 arp 120 19 0 5 1 0 1 1 0 8 0 ipq 40 4 0 1 1 0 1 1 0 8 0 ipqe 40 8 0 4 1 0 1 1 0 8 0 inpcb 336 285 0 274 4 0 4 4 0 8 2 nd6 136 26 0 7 1 0 1 1 0 8 0 kcovpl 48 45 0 39 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 458 0 92 29 0 29 29 0 8 1 art_table 32 459 0 92 4 0 4 4 0 8 0 art_node 16 113 0 32 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 1 1 0 1 1 0 8 1 semupl 112 3 0 3 1 0 1 1 0 8 1 semapl 112 18 0 8 1 0 1 1 0 8 0 shmpl 112 10 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1910 0 368 97 0 97 97 0 8 0 ffsino 272 1910 0 368 103 0 103 103 0 8 0 nchpl 144 2319 0 611 64 0 64 64 0 8 0 uvmvnodes 80 2504 0 0 52 0 52 52 0 8 0 vnodes 216 2504 0 0 140 0 140 140 0 8 0 namei 1024 8079 0 8077 1 0 1 1 0 8 0 percpumem 16 46 0 2 1 0 1 1 0 8 0 kstatmem 264 22 0 4 2 0 2 2 0 8 0 scxspl 216 6416 0 6416 3 1 2 2 1 8 2 plimitpl 152 151 0 129 2 0 2 2 0 8 1 sigapl 424 656 0 606 8 0 8 8 0 8 1 futexpl 64 2401 0 2399 1 0 1 1 0 8 0 knotepl 120 314 0 0 10 0 10 10 0 8 0 kqueuepl 216 69 0 60 1 0 1 1 0 8 0 pipepl 320 309 0 281 4 0 4 4 0 8 0 fdescpl 496 637 0 606 6 0 6 6 0 8 1 filepl 152 4091 0 3875 19 1 18 19 0 8 8 lockfpl 104 58 0 53 1 0 1 1 0 8 0 lockfspl 48 24 0 21 1 0 1 1 0 8 0 sessionpl 144 62 0 47 1 0 1 1 0 8 0 pgrppl 48 111 0 89 1 0 1 1 0 8 0 ucredpl 104 723 0 706 1 0 1 1 0 8 0 zombiepl 144 606 0 606 1 0 1 1 0 8 1 processpl 1160 656 0 606 5 0 5 5 0 8 0 procpl 648 905 0 848 7 0 7 7 0 8 2 sosppl 168 2 0 2 1 0 1 1 0 8 1 sockpl 664 778 0 748 15 4 11 15 0 8 8 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 129 0 0 17 0 17 17 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 18 0 0 3 0 3 3 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 722 0 0 46 0 46 46 0 8 0 bufpl 280 2482 0 94 171 0 171 171 0 8 0 anonpl 24 175406 0 172289 23 1 22 23 0 185 0 amapchunkpl 152 15895 0 15477 37 1 36 36 0 158 16 amappl16 200 4675 0 4664 5 3 2 5 0 8 1 amappl15 192 12 0 12 1 1 0 1 0 8 0 amappl14 184 118 0 107 1 0 1 1 0 8 0 amappl13 176 4 0 4 1 1 0 1 0 8 0 amappl12 168 1251 0 1221 3 1 2 2 0 8 0 amappl11 160 50 0 40 1 0 1 1 0 8 0 amappl10 152 15 0 15 1 1 0 1 0 8 0 amappl9 144 147 0 147 1 1 0 1 0 8 0 amappl8 136 26 0 25 1 0 1 1 0 8 0 amappl7 128 102 0 91 1 0 1 1 0 8 0 amappl6 120 162 0 161 1 0 1 1 0 8 0 amappl5 112 136 0 126 1 0 1 1 0 8 0 amappl4 104 298 0 284 1 0 1 1 0 8 0 amappl3 96 2626 0 2549 4 0 4 4 0 8 1 amappl2 88 950 0 864 3 0 3 3 0 8 1 amappl1 80 9022 0 8420 14 1 13 14 0 8 0 amappl 88 4244 0 4092 6 0 6 6 0 92 1 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 12 0 0 1 0 1 1 0 8 0 uaddrrnd 24 637 0 606 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 637 0 606 1 0 1 1 0 8 0 vmmpekpl 168 8350 0 8297 3 0 3 3 0 8 0 vmmpepl 168 48453 0 46657 93 0 93 93 0 357 11 vmsppl 440 636 0 606 6 1 5 5 0 8 1 rwobjpl 56 20546 0 17155 50 2 48 48 0 8 0 pdppl 4096 1281 0 1212 117 44 73 97 0 8 4 pvpl 32 10186 0 0 84 1 83 83 0 265 0 pmappl 248 636 0 606 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 432 0 46 12 0 12 12 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7658f19742c0, count: -1 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff800029b7bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __sanitizer_cov_trace_const_cmp1(4,0) at __sanitizer_cov_trace_const_cmp1+0x2e kd_curproc sys/dev/kcov.c:589 [inline] __sanitizer_cov_trace_const_cmp1(4,0) at __sanitizer_cov_trace_const_cmp1+0x2e sys/dev/kcov.c:223 comcnputc(800,37) at comcnputc+0x1e5 sys/dev/ic/com.c:1269 cnputc(37) at cnputc+0x61 sys/dev/cons.c:218 db_putchar(37) at db_putchar+0x65c sys/ddb/db_output.c:155 kprintf() at kprintf+0x2aba sys/kern/subr_prf.c:1065 db_printf(ffffffff830941d4) at db_printf+0x9b fault(ffffffff8303fe12) at fault+0xa7 sys/arch/amd64/amd64/trap.c:157 kpageflttrap(ffff80002a198980,ffff8000013c7008) at kpageflttrap+0x385 sys/arch/amd64/amd64/trap.c:290 kerntrap(ffff80002a198980) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b unveil_add_vnode(ffff80002a02dbf8,fffffd8060b6f988) at unveil_add_vnode+0xda sys/kern/kern_unveil.c:391 end trace frame: 0xffff80002a198b60, count: 0 ddb{1}> trace x86_ipi_db(ffff800029b7bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __sanitizer_cov_trace_const_cmp1(4,0) at __sanitizer_cov_trace_const_cmp1+0x2e kd_curproc sys/dev/kcov.c:589 [inline] __sanitizer_cov_trace_const_cmp1(4,0) at __sanitizer_cov_trace_const_cmp1+0x2e sys/dev/kcov.c:223 comcnputc(800,37) at comcnputc+0x1e5 sys/dev/ic/com.c:1269 cnputc(37) at cnputc+0x61 sys/dev/cons.c:218 db_putchar(37) at db_putchar+0x65c sys/ddb/db_output.c:155 kprintf() at kprintf+0x2aba sys/kern/subr_prf.c:1065 db_printf(ffffffff830941d4) at db_printf+0x9b fault(ffffffff8303fe12) at fault+0xa7 sys/arch/amd64/amd64/trap.c:157 kpageflttrap(ffff80002a198980,ffff8000013c7008) at kpageflttrap+0x385 sys/arch/amd64/amd64/trap.c:290 kerntrap(ffff80002a198980) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b unveil_add_vnode(ffff80002a02dbf8,fffffd8060b6f988) at unveil_add_vnode+0xda sys/kern/kern_unveil.c:391 unveil_add(ffff80002a02dbf8,ffff80002a198b78,ffff80002a198c33) at unveil_add+0x448 sys/kern/kern_unveil.c:494 sys_unveil(ffff80002a02dbf8,ffff80002a198d60,ffff80002a198cb0) at sys_unveil+0x60c sys/kern/vfs_syscalls.c:1020 syscall(ffff80002a198d60) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff80002a198d60) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf95eb52ec0, count: -18