uvm_fault(0xffffffff82639870, 0xfffffd0000000048, 0, 1) -> e kernel: page fault trap, code=0 Stopped at uvmfault_anonget+0x89: movl 0x48(%r13),%ebx ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic kernel page fault uvm_fault(0xffffffff82639870, 0xfffffd0000000048, 0, 1) -> e uvmfault_anonget(ffff800020f49bd8,fffffd806940fac0,fffffd80694a1000) at uvmfault_anonget+0x89 sys/uvm/uvm_fault.c:287 end trace frame: 0xffff800020f49c80, count: 0 ddb{0}> trace uvmfault_anonget(ffff800020f49bd8,fffffd806940fac0,fffffd80694a1000) at uvmfault_anonget+0x89 sys/uvm/uvm_fault.c:287 uvm_fault(fffffd806e95bb88,c0022fe000,1,2) at uvm_fault+0x88a sys/uvm/uvm_fault.c:842 pageflttrap(ffff800020f49d70,1) at pageflttrap+0x1b8 sys/arch/amd64/amd64/trap.c:221 usertrap(ffff800020f49d70) at usertrap+0x21a sys/arch/amd64/amd64/trap.c:384 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0xc00042ad98, count: -5 ddb{0}> show registers rdi 0xffff800020f49bd8 rsi 0xfffffd806940fac0 rbp 0xffff800020f49a40 rbx 0x1 rdx 0xfffffd80694a1000 rcx 0xffff800020e6c008 rax 0 r8 0xffffffff8132263f pmap_extract+0x12f r9 0x1 r10 0x2 r11 0xacd7bd619681d786 r12 0xffff800020f49bd8 r13 0xfffffd0000000000 r14 0x3 r15 0xfffffd80694a1000 rip 0xffffffff81dcb1b9 uvmfault_anonget+0x89 cs 0x8 rflags 0x10286 __ALIGN_SIZE+0xf286 rsp 0xffff800020f499d0 ss 0 uvmfault_anonget+0x89: movl 0x48(%r13),%ebx ddb{0}> show proc PROC (syz-fuzzer) pid=129450 stat=onproc flags process=2 proc=4000000 pri=61, usrpri=62, nice=20 forw=0xffffffffffffffff, list=0xffff800020e6cc38,0xffff800020e6d398 process=0xffff800020ec8018 user=0xffff800020f44000, vmspace=0xfffffd806e95bb88 estcpu=12, cpticks=2, pctcpu=0.8 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 26540 246531 37100 0 2 0 syz-executor.1 26540 312510 37100 0 2 0x4000000 syz-executor.1 59991 203493 98305 0 3 0x82 piperd syz-executor.0 17378 190070 0 0 3 0x14200 bored sosplice 37100 289033 98305 0 2 0x482 syz-executor.1 98305 93944 32350 0 3 0x82 kqread syz-fuzzer 98305 19543 32350 0 7 0x4000482 syz-fuzzer 98305 172068 32350 0 3 0x4000082 thrsleep syz-fuzzer 98305 137028 32350 0 3 0x4000082 thrsleep syz-fuzzer 98305 125439 32350 0 3 0x4000082 thrsleep syz-fuzzer 98305 459346 32350 0 3 0x4000082 thrsleep syz-fuzzer *98305 129450 32350 0 7 0x4000002 syz-fuzzer 98305 46564 32350 0 3 0x4000082 thrsleep syz-fuzzer 98305 351562 32350 0 3 0x4000082 thrsleep syz-fuzzer 98305 147135 32350 0 3 0x4000082 thrsleep syz-fuzzer 32350 452152 73746 0 3 0x10008a pause ksh 73746 218377 84492 0 3 0x92 select sshd 89336 344239 1 0 3 0x100083 ttyin getty 84492 329199 1 0 3 0x80 select sshd 98833 497388 39837 74 3 0x100092 bpf pflogd 39837 461412 1 0 3 0x80 netio pflogd 20128 99336 1373 73 3 0x100090 kqread syslogd 1373 280608 1 0 3 0x100082 netio syslogd 6844 469228 1 77 3 0x100090 poll dhclient 82822 172576 1 0 3 0x80 poll dhclient 188 170551 0 0 3 0x14200 bored smr 62839 284176 0 0 2 0x14200 zerothread 70241 155852 0 0 3 0x14200 aiodoned aiodoned 70503 213848 0 0 3 0x14200 syncer update 72436 274440 0 0 3 0x14200 cleaner cleaner 86265 9676 0 0 3 0x14200 reaper reaper 98028 283821 0 0 3 0x14200 pgdaemon pagedaemon 57135 7299 0 0 3 0x14200 bored crynlk 18293 137852 0 0 3 0x14200 bored crypto 74996 137960 0 0 3 0x40014200 acpi0 acpi0 91855 311271 0 0 3 0x40014200 idle1 8537 189203 0 0 3 0x14200 bored softnet 25449 293497 0 0 3 0x14200 bored systqmp 72670 216469 0 0 3 0x14200 bored systq 64356 192471 0 0 3 0x40014200 bored softclock 85510 507754 0 0 3 0x40014200 idle0 1 440826 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 98305 (syz-fuzzer) thread 0xffff800020e6c008 (129450) shared rwlock vmmaplk r = 0 (0xfffffd806e95bba0) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1448 #2 uvm_fault+0x7f sys/uvm/uvm_fault.c:524 #3 pageflttrap+0x1b8 sys/arch/amd64/amd64/trap.c:221 #4 usertrap+0x21a sys/arch/amd64/amd64/trap.c:384 #5 recall_trap+0x8 exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82641ae8) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 pageflttrap+0x7f sys/arch/amd64/amd64/trap.c:180 #2 usertrap+0x21a sys/arch/amd64/amd64/trap.c:384 #3 recall_trap+0x8 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9517 6415K 6931K 78643K 11585 0 pcb 13 8K 8K 78643K 58 0 rtable 112 3K 4K 78643K 287 0 ifaddr 71 13K 14K 78643K 92 0 counters 43 33K 34K 78643K 49 0 ioctlops 0 0K 4K 78643K 1478 0 iov 0 0K 16K 78643K 36 0 mount 1 1K 1K 78643K 1 0 vnodes 1224 77K 77K 78643K 1480 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 9 0 VM map 2 1K 1K 78643K 2 0 sem 12 1K 1K 78643K 17 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 5 13K 25K 78643K 397 0 proc 62 63K 95K 78643K 533 0 subproc 32 2K 2K 78643K 51 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 22 0 in_multi 40 2K 2K 78643K 73 0 ether_multi 1 0K 0K 78643K 8 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 31 148K 148K 78643K 31 0 exec 0 0K 1K 78643K 245 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 127 23K 23K 78643K 2220 0 UVM aobj 24 7K 7K 78643K 26 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 36 0 NDP 12 0K 0K 78643K 21 0 temp 100 3034K 3102K 78643K 6568 0 kqueue 3 4K 12K 78643K 13 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 arp 64 10 0 2 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 31 0 29 1 0 1 1 0 8 0 rtentry 112 58 0 12 2 0 2 2 0 8 0 unpcb 120 115 0 105 1 0 1 1 0 8 0 syncache 264 9 0 9 2 2 0 1 0 8 0 tcpqe 32 80 0 80 1 1 0 1 0 8 0 tcpcb 544 278 0 274 1 0 1 1 0 8 0 inpcb 280 444 0 435 2 1 1 2 0 8 0 nd6 48 9 0 3 1 0 1 1 0 8 0 pffrag 232 3 0 3 1 1 0 1 0 482 0 pffrnode 88 3 0 3 1 1 0 1 0 8 0 pffrent 40 6 0 6 1 1 0 1 0 8 0 pfosfp 40 846 0 423 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 40 0 18 1 0 1 1 0 8 0 pfstkey 112 40 0 18 1 0 1 1 0 8 0 pfstate 328 40 0 18 3 0 3 3 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 256 239 0 44 13 0 13 13 0 8 0 art_table 32 240 0 44 2 0 2 2 0 8 0 art_node 16 57 0 15 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 5 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 11 0 1 1 0 1 1 0 8 0 shmpl 112 24 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1888 0 483 90 1 89 89 0 8 0 ffsino 272 1888 0 483 94 0 94 94 0 8 0 nchpl 144 2642 0 1048 60 0 60 60 0 8 0 uvmvnodes 72 2167 0 0 40 0 40 40 0 8 0 vnodes 208 2167 0 0 115 0 115 115 0 8 0 namei 1024 7334 0 7334 2 1 1 1 0 8 1 percpumem 16 35 0 3 1 0 1 1 0 8 0 vmpool 560 1 0 1 1 0 1 1 0 8 1 scxspl 192 7022 0 7022 8 7 1 7 0 8 1 plimitpl 152 28 0 20 1 0 1 1 0 8 0 sigapl 424 610 0 578 4 0 4 4 0 8 0 futexpl 56 5343 0 5343 2 1 1 1 0 8 1 knotepl 112 85 0 66 1 0 1 1 0 8 0 kqueuepl 144 202 0 200 1 0 1 1 0 8 0 pipelkpl 48 102 0 92 1 0 1 1 0 8 0 pipepl 120 204 0 185 1 0 1 1 0 8 0 fdescpl 496 594 0 578 3 0 3 3 0 8 0 filepl 152 3004 0 2904 6 1 5 6 0 8 1 lockfpl 104 58 0 57 1 0 1 1 0 8 0 lockfspl 48 24 0 23 1 0 1 1 0 8 0 sessionpl 112 19 0 8 1 0 1 1 0 8 0 pgrppl 48 19 0 8 1 0 1 1 0 8 0 ucredpl 96 332 0 323 1 0 1 1 0 8 0 zombiepl 144 578 0 578 1 0 1 1 0 8 1 processpl 984 610 0 578 5 0 5 5 0 8 0 procpl 624 1396 0 1354 4 0 4 4 0 8 0 sosppl 128 2 0 2 1 0 1 1 0 8 1 sockpl 400 612 0 593 7 4 3 6 0 8 1 mcl64k 65536 10 0 0 2 0 2 2 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 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 9 0 0 2 0 2 2 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 159 0 0 19 0 19 19 0 8 0 mtagpl 80 22 0 0 1 0 1 1 0 8 0 mbufpl 256 195 0 0 11 0 11 11 0 8 0 bufpl 280 4665 0 133 324 0 324 324 0 8 0 anonpl 16 63070 0 51459 69 6 63 67 0 124 1 amapchunkpl 152 3167 0 3037 8 1 7 8 0 158 0 amappl16 192 2487 0 1655 47 3 44 45 0 8 2 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 37 0 31 1 0 1 1 0 8 0 amappl13 168 46 0 41 1 0 1 1 0 8 0 amappl12 160 7 0 4 1 0 1 1 0 8 0 amappl11 152 55 0 40 1 0 1 1 0 8 0 amappl10 144 178 0 173 1 0 1 1 0 8 0 amappl9 136 568 0 567 1 0 1 1 0 8 0 amappl8 128 558 0 521 2 0 2 2 0 8 0 amappl7 120 291 0 277 1 0 1 1 0 8 0 amappl6 112 33 0 23 1 0 1 1 0 8 0 amappl5 104 490 0 474 1 0 1 1 0 8 0 amappl4 96 513 0 481 1 0 1 1 0 8 0 amappl3 88 108 0 103 1 0 1 1 0 8 0 amappl2 80 3712 0 3636 2 0 2 2 0 8 0 amappl1 72 22645 0 22201 23 13 10 18 0 8 0 amappl 80 1664 0 1622 2 0 2 2 0 84 0 dma4096 4096 1 0 1 1 1 0 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 25 0 2 1 0 1 1 0 8 0 uaddrrnd 24 595 0 579 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 595 0 579 1 0 1 1 0 8 0 vmmpekpl 168 8098 0 8064 2 0 2 2 0 8 0 vmmpepl 168 78624 0 76619 139 18 121 121 0 357 29 vmsppl 368 594 0 579 2 0 2 2 0 8 0 pdppl 4096 1198 0 1158 6 0 6 6 0 8 0 pvpl 32 206846 0 192100 167 12 155 167 0 265 6 pmappl 232 594 0 579 2 1 1 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 263 0 9 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace uvmfault_anonget(ffff800020f49bd8,fffffd806940fac0,fffffd80694a1000) at uvmfault_anonget+0x89 sys/uvm/uvm_fault.c:287 uvm_fault(fffffd806e95bb88,c0022fe000,1,2) at uvm_fault+0x88a sys/uvm/uvm_fault.c:842 pageflttrap(ffff800020f49d70,1) at pageflttrap+0x1b8 sys/arch/amd64/amd64/trap.c:221 usertrap(ffff800020f49d70) at usertrap+0x21a sys/arch/amd64/amd64/trap.c:384 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0xc00042ad98, count: -5 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff800020e00ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352 x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __sanitizer_cov_trace_cmp4(966e6,966e7) at __sanitizer_cov_trace_cmp4+0x5d kd_curproc sys/dev/kcov.c:416 [inline] __sanitizer_cov_trace_cmp4(966e6,966e7) at __sanitizer_cov_trace_cmp4+0x5d trace_cmp sys/dev/kcov.c:104 [inline] __sanitizer_cov_trace_cmp4(966e6,966e7) at __sanitizer_cov_trace_cmp4+0x5d sys/dev/kcov.c:135 __mp_lock(ffffffff826418e0) at __mp_lock+0x139 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff826418e0) at __mp_lock+0x139 sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff826418e0,1) at __mp_acquire_count+0x51 sys/kern/kern_lock.c:227 mi_switch() at mi_switch+0x392 sys/kern/sched_bsd.c:435 sleep_finish(ffff800020f18d80,1) at sleep_finish+0x113 sys/kern/kern_synch.c:418 sleep_finish_all(ffff800020f18d80,1) at sleep_finish_all+0x32 sleep_finish_timeout sys/kern/kern_synch.c:447 [inline] sleep_finish_all(ffff800020f18d80,1) at sleep_finish_all+0x32 sys/kern/kern_synch.c:393 tsleep(ffffffff825e82d0,120,ffffffff821f1999,2) at tsleep+0x1cc sys/kern/kern_synch.c:155 sys_nanosleep(ffff800020ed0760,ffff800020f18eb0,ffff800020f18f00) at sys_nanosleep+0x205 sys/kern/kern_time.c:297 syscall(ffff800020f18f80) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020f18f80) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc00004ff38, count: -13