*cpu1: uvm_fault(0xfffffd806ceb7d78, 0x98, 0, 1) -> e ddb{0}> show kasan No such command ddb{0}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x799a9ef004e0, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80003c4232f0 rbx 0 rdx 0 rcx 0xffff80003c407780 rax 0x2a r8 0xffff80003c423220 r9 0 r10 0x297d9a90d47ca00c r11 0x51abc275e9f71dc1 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff8257e4c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003c423270 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{0}> show proc PROC (syz-executor) tid=219520 pid=59839 tcnt=1 stat=onproc flags process=0 proc=0 runpri=50, usrpri=86, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c406a88,0xffffffff83b408a0 process=0xffff800038b95360 user=0xffff80003c41e000, vmspace=0xfffffd806ceb75d8 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND *59839 219520 23182 0 7 0 0 syz-executor 25031 295989 83817 0 2 0 0 syz-executor 56944 161809 56441 0 2 0 0 syz-executor 56944 81607 56441 0 7 0 0x4000000 syz-executor 56944 435233 56441 0 3 0 0x4000080 fsleep syz-executor 56944 482628 56441 0 3 0 0x4000080 fsleep syz-executor 62518 47818 80924 0 2 0 0 syz-executor 62518 137375 80924 0 3 0 0x4000080 semwait syz-executor 62518 284451 80924 0 3 0 0x4000080 fsleep syz-executor 43828 61943 16827 0 3 0 0x80 nanoslp syz-executor 43828 401470 16827 0 3 0 0x4000080 fsleep syz-executor 43828 493838 16827 0 3 0 0x4000080 fifor syz-executor 17621 439570 75815 0 3 0 0x80 nanoslp syz-executor 17621 179000 75815 0 3 0 0x4000080 kqpoll syz-executor 17621 491698 75815 0 3 0 0x4000080 fsleep syz-executor 58236 510218 82157 0 3 0 0x80 nanoslp syz-executor 58236 428235 82157 0 3 0 0x4000080 fsleep syz-executor 58236 214839 82157 0 3 0 0x4000080 pipewr syz-executor 26714 347508 15387 -1 3 0x10 0x80 nanoslp syz-executor 26714 290254 15387 -1 3 0x10 0x4000080 kqread syz-executor 26714 208471 15387 -1 3 0x10 0x4000080 fsleep syz-executor 26714 186561 15387 -1 3 0x10 0x4000080 fsleep syz-executor 70549 509665 0 0 3 0x14000 0x200 acct acct 56441 517395 22551 0 3 0x2 0x80 nanoslp syz-executor 75815 198547 22551 0 3 0x2 0x80 nanoslp syz-executor 82157 291557 22551 0 3 0x2 0x80 nanoslp syz-executor 15387 159514 22551 0 3 0x2 0x80 nanoslp syz-executor 16827 423500 22551 0 3 0x2 0x80 nanoslp syz-executor 80924 195864 22551 0 3 0x2 0x80 nanoslp syz-executor 23182 233714 22551 0 2 0x2 0 syz-executor 83817 492785 22551 0 3 0x2 0x80 nanoslp syz-executor 22551 98642 59905 0 3 0x2 0x80 kqread syz-executor 59905 102223 64222 0 3 0x100002 0x88 sigsusp ksh 64222 392994 69220 0 3 0x10 0x88 kqread sshd-session 69220 383262 87798 0 3 0x12 0x80 kqread sshd-session 95641 244847 1 0 3 0x100003 0x80 ttyin getty 87798 174145 1 0 3 0 0x88 kqread sshd 24984 136844 28185 74 3 0x1100012 0x80 bpf pflogd 28185 30609 1 0 3 0 0x80 sbwait pflogd 84976 93534 11743 73 3 0x1100010 0x80 kqread syslogd 11743 49863 1 0 3 0x100002 0x80 sbwait syslogd 35827 373326 1 0 3 0x100000 0x80 kqread resolvd 37089 313382 34747 77 3 0x100012 0x80 kqread dhcpleased 49080 209885 34747 77 3 0x100012 0x80 kqread dhcpleased 34747 104349 1 0 3 0 0x80 kqread dhcpleased 3417 306411 0 0 3 0x14000 0x200 bored smr 47099 477805 0 0 2 0x14000 0x200 zerothread 66493 143050 0 0 3 0x14000 0x200 aiodoned aiodoned 79812 232373 0 0 3 0x14000 0x200 syncer update 46454 170089 0 0 3 0x14000 0x200 cleaner cleaner 66572 480676 0 0 3 0x14000 0x200 reaper reaper 9218 455454 0 0 3 0x14000 0x200 pgdaemon pagedaemon 19978 188700 0 0 3 0x14000 0x200 bored viomb 11021 379186 0 0 3 0x14000 0x40000200 acpi0 acpi0 56507 490686 0 0 3 0x14000 0x40000200 idle1 92804 408362 0 0 3 0x14000 0x200 bored softnet1 61595 239248 0 0 3 0x14000 0x200 bored softnet0 97468 119911 0 0 3 0x14000 0x200 bored systqmp 23249 133826 0 0 3 0x14000 0x200 bored systq 41221 59266 0 0 3 0x14000 0x200 tmoslp softclockmp 68043 385625 0 0 3 0x14000 0x40000200 tmoslp softclock 73906 108179 0 0 3 0x14000 0x40000200 idle0 1 61224 0 0 3 0x2 0x80 wait init 0 0 -1 0 3 0x10000 0x200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &uvm.pageqlock r = 0 (0xffffffff83a64bb8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 mtx_enter+0x4b4 sys/kern/kern_lock.c:487 #2 uvm_pageactivate+0x15a sys/uvm/uvm_page.c:1270 #3 uvm_fault_upper_lookup+0x24d sys/uvm/uvm_fault.c:977 #4 uvm_fault+0x159 sys/uvm/uvm_fault.c:632 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 #7 recall_trap+0x8 Process 59839 (syz-executor) thread 0xffff80003c407780 (219520) shared rwlock amaplk r = 0 (0xfffffd806e178680) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 uvm_fault_check+0x8a9 sys/uvm/uvm_fault.c:834 #3 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #4 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #5 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 #6 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd806ceb76d8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1880 #3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 #7 recall_trap+0x8 exclusive mutex &uvm.pageqlock r = 0 (0xffffffff83a64bb8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 mtx_enter+0x4b4 sys/kern/kern_lock.c:487 #2 uvm_pageactivate+0x15a sys/uvm/uvm_page.c:1270 #3 uvm_fault_upper_lookup+0x24d sys/uvm/uvm_fault.c:977 #4 uvm_fault+0x159 sys/uvm/uvm_fault.c:632 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 #7 recall_trap+0x8 Process 56944 (syz-executor) thread 0xffff800038b92d18 (81607) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83aedc00) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] #1 syscall+0xaf4 sys/arch/amd64/amd64/trap.c:783 #2 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11064 12159K 12279K 166960K 12210 0 pcb 18 12K 12K 166960K 35 0 rtable 240 7K 9K 166960K 372 0 pf 35 17K 21K 166960K 59 0 ifaddr 43 7K 7K 166960K 47 0 ifgroup 55 2K 2K 166960K 62 0 sysctl 3 1K 9K 166960K 7 0 counters 70 37K 37K 166960K 78 0 ioctlops 0 0K 4K 166960K 1558 0 iov 0 0K 1K 166960K 2 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1296 81K 82K 166960K 1392 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 1K 166960K 2 0 VM map 2 1K 1K 166960K 2 0 sem 5 0K 0K 166960K 7 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1734 201K 291K 166960K 11964 0 file desc 18 65K 97K 166960K 200 0 proc 72 115K 196K 166960K 564 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 18 0 in_multi 99 6K 6K 166960K 102 0 ether_multi 1 0K 0K 166960K 2 0 mrt 0 0K 0K 166960K 3 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 73 334K 334K 166960K 73 0 exec 0 0K 1K 166960K 387 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 239 151K 163K 166960K 3565 0 UVM aobj 4 2K 2K 166960K 4 0 pinsyscall 43 86K 107K 166960K 1356 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 NDP 12 0K 1K 166960K 30 0 temp 37 9118K 9126K 166960K 8597 0 kqueue 16 26K 26K 166960K 42 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 28 0 0 1 0 1 1 0 8 0 rtpcb 120 36 0 33 1 0 1 1 0 8 0 rtentry 176 114 0 4 6 0 6 6 0 8 0 unpcb 144 66 0 45 1 0 1 1 0 8 0 syncache 336 5 0 5 1 0 1 1 0 8 1 tcpcb 736 22 0 18 1 0 1 1 0 8 0 arp 136 19 0 1 1 0 1 1 0 8 0 inpcb 328 184 0 176 7 0 7 7 0 8 6 nd6 152 24 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 3 0 3 1 0 1 1 0 8 1 pfstscr 40 1 0 0 1 0 1 1 0 8 0 pffrag 232 2 0 0 1 0 1 1 0 482 0 pffrnode 88 2 0 0 1 0 1 1 0 8 0 pffrent 40 2 0 0 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 pfrktable 1344 5 0 5 1 0 1 1 0 8 1 pfanchor 1288 2 0 2 1 0 1 1 0 8 1 pftag 88 2 0 2 1 0 1 1 0 8 1 pfstitem 24 25 0 1 1 0 1 1 0 8 0 pfstkey 128 25 0 1 1 0 1 1 0 8 0 pfstate 448 25 0 0 3 0 3 3 0 8 0 pfrule 1360 22 0 17 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 456 0 2 29 0 29 29 0 8 0 art_table 40 457 0 2 5 0 5 5 0 8 0 art_node 32 114 0 14 1 0 1 1 0 8 0 semapl 72 3 0 1 1 0 1 1 0 8 0 shmpl 112 1 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1666 0 194 93 0 93 93 0 8 0 ffsino 296 1666 0 194 114 0 114 114 0 8 0 nchpl 144 1943 0 238 64 0 64 64 0 8 0 vnodes 216 1772 0 0 99 0 99 99 0 8 0 namei 1024 5979 0 5979 2 0 2 2 0 8 2 percpumem 16 55 0 4 1 0 1 1 0 8 0 pfiaddrpl 120 1 0 1 1 0 1 1 0 8 1 kstatmem 264 31 0 4 3 0 3 3 0 8 1 scxspl 216 6695 0 6695 4 3 1 3 1 8 1 plimitpl 152 40 0 23 1 0 1 1 0 8 0 sigapl 424 518 0 469 7 0 7 7 0 8 1 knotepl 120 289 0 0 9 0 9 9 0 8 0 kqueuepl 224 41 0 28 1 0 1 1 0 8 0 pipepl 344 164 0 135 6 0 6 6 0 8 3 fdescpl 528 501 0 469 3 0 3 3 0 8 0 filepl 160 2041 0 1809 13 0 13 13 0 8 2 lockfpl 104 24 0 22 1 0 1 1 0 8 0 lockfspl 48 13 0 11 1 0 1 1 0 8 0 sessionpl 144 59 0 50 1 0 1 1 0 8 0 pgrppl 48 68 0 51 1 0 1 1 0 8 0 ucredpl 104 175 0 161 1 0 1 1 0 8 0 zombiepl 144 469 0 469 1 0 1 1 0 8 1 processpl 1232 518 0 469 5 0 5 5 0 8 0 procpl 664 625 0 562 6 0 6 6 0 8 0 sockpl 752 292 0 260 10 0 10 10 0 8 6 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k128 9344 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 126 0 0 16 0 16 16 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 15 0 0 2 0 2 2 0 8 0 mextrefs 64 7 0 0 1 0 1 1 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 149 0 0 9 0 9 9 0 8 0 bufpl 272 2517 0 106 161 0 161 161 0 8 0 anonpl 32 3855 0 0 32 0 32 32 0 247 0 amapchunkpl 152 10194 0 9690 21 0 21 21 0 158 0 amappl16 200 1962 0 1939 5 2 3 5 0 8 0 amappl15 192 7 0 7 1 1 0 1 0 8 0 amappl14 184 448 0 447 1 0 1 1 0 8 0 amappl13 176 125 0 113 1 0 1 1 0 8 0 amappl12 168 765 0 735 2 0 2 2 0 8 0 amappl11 160 13 0 12 1 0 1 1 0 8 0 amappl10 152 70 0 56 1 0 1 1 0 8 0 amappl9 144 305 0 305 1 1 0 1 0 8 0 amappl8 136 99 0 97 1 0 1 1 0 8 0 amappl7 128 182 0 169 1 0 1 1 0 8 0 amappl6 120 187 0 185 1 0 1 1 0 8 0 amappl5 112 97 0 85 1 0 1 1 0 8 0 amappl4 104 305 0 284 1 0 1 1 0 8 0 amappl3 96 1877 0 1762 3 0 3 3 0 8 0 amappl2 88 546 0 484 2 0 2 2 0 8 0 amappl1 80 10822 0 10212 15 0 15 15 0 8 1 amappl 88 2837 0 2669 4 0 4 4 0 92 0 uvmvnodes 80 98 0 0 2 0 2 2 0 8 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 3 0 0 1 0 1 1 0 8 0 uaddrrnd 24 501 0 469 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 501 0 469 1 0 1 1 0 8 0 vmmpekpl 168 6210 0 6172 2 0 2 2 0 8 0 vmmpepl 168 41738 0 39782 87 0 87 87 0 357 1 vmsppl 488 500 0 469 5 0 5 5 0 8 1 rwobjpl 80 15387 0 14345 24 0 24 24 0 8 2 pdppl 4096 1009 0 938 101 28 73 87 0 8 2 pvpl 32 10504 0 0 85 0 85 85 0 265 0 pmappl 256 500 0 469 3 0 3 3 0 8 0 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 112 433 0 31 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: 0x799a9ef004e0, count: -1 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff80002999dff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 x86_bus_space_io_read_4(b008,0) at x86_bus_space_io_read_4+0x37 sys/arch/amd64/amd64/bus_space.c:682 acpitimer_delay(1) at acpitimer_delay+0x1d7 acpitimer_read sys/dev/acpi/acpitimer.c:146 [inline] acpitimer_delay(1) at acpitimer_delay+0x1d7 sys/dev/acpi/acpitimer.c:125 comcnputc(800,29) at comcnputc+0x29b sys/dev/ic/com.c:1274 cnputc(29) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(29) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff83461dee) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff8351d7a9) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80003c438ed0,98) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80003c438ed0) at kerntrap+0x19d sys/arch/amd64/amd64/trap.c:528 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b end trace frame: 0xffff80003c439080, count: 0 ddb{1}> trace x86_ipi_db(ffff80002999dff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 x86_bus_space_io_read_4(b008,0) at x86_bus_space_io_read_4+0x37 sys/arch/amd64/amd64/bus_space.c:682 acpitimer_delay(1) at acpitimer_delay+0x1d7 acpitimer_read sys/dev/acpi/acpitimer.c:146 [inline] acpitimer_delay(1) at acpitimer_delay+0x1d7 sys/dev/acpi/acpitimer.c:125 comcnputc(800,29) at comcnputc+0x29b sys/dev/ic/com.c:1274 cnputc(29) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(29) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff83461dee) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff8351d7a9) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80003c438ed0,98) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80003c438ed0) at kerntrap+0x19d sys/arch/amd64/amd64/trap.c:528 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff800038b92d18,fffffd80644fa038,ffff80003c4390b0) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2691 sys_futimes(ffff800038b92d18,ffff80003c439200,ffff80003c439150) at sys_futimes+0x208 sys/kern/vfs_syscalls.c:2733 syscall(ffff80003c439200) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c439200) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x40248aed590, count: -18