uvm_fault(0xffffffff82d62118, 0x0, 0, 2) -> e kernel: page fault trap, code=2 Stopped at pool_gc_pages+0x1e1: movq %rax,0(%rcx) TID PID UID PRFLAGS PFLAGS CPU COMMAND 154035 39911 0 0x8000000 0x4000000 1 syz-executor.7 *172977 56654 0 0x14000 0x200 0 systqmp pool_gc_pages(0) at pool_gc_pages+0x1e1 pool_p_remove sys/kern/subr_pool.c:1049 [inline] pool_gc_pages(0) at pool_gc_pages+0x1e1 sys/kern/subr_pool.c:1576 taskq_thread(ffffffff82d3abc0) at taskq_thread+0xe5 sys/kern/kern_task.c:450 end trace frame: 0x0, count: 13 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs. ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: uvm_fault(0xffffffff82d62118, 0x0, 0, 2) -> e ddb{0}> trace pool_gc_pages(0) at pool_gc_pages+0x1e1 pool_p_remove sys/kern/subr_pool.c:1049 [inline] pool_gc_pages(0) at pool_gc_pages+0x1e1 sys/kern/subr_pool.c:1576 taskq_thread(ffffffff82d3abc0) at taskq_thread+0xe5 sys/kern/kern_task.c:450 end trace frame: 0x0, count: -2 ddb{0}> show registers rdi 0 rsi 0xf90 rbp 0xffff80002a11cee0 rbx 0xf90 rdx 0 rcx 0 rax 0 r8 0 r9 0 r10 0x2c0e3fb683fb43f9 r11 0x104d7e7d0c5cc19b r12 0x1dcd65000 r13 0xfffffd806b1c7f90 r14 0 r15 0xffffffff82e29150 sosplice_pool rip 0xffffffff8159e5c1 pool_gc_pages+0x1e1 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002a11cea0 ss 0x10 pool_gc_pages+0x1e1: movq %rax,0(%rcx) ddb{0}> show proc PROC (systqmp) tid=172977 pid=56654 tcnt=1 stat=onproc flags process=14000 proc=200 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff8000ffffecd0,0xffff8000ffffe7c0 process=0xffff80002a0fd1c0 user=0xffff80002a118000, vmspace=0xffffffff82d62118 estcpu=0, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 39911 191503 6293 0 2 0x8000000 syz-executor.7 39911 154035 6293 0 7 0xc000000 syz-executor.7 50575 116480 1007 0 2 0x8000010 syz-executor.4 50575 196738 1007 0 3 0xc000090 fsleep syz-executor.4 39794 128004 17282 0 2 0x8000000 syz-executor.3 39794 489967 17282 0 3 0xc000080 fsleep syz-executor.3 39794 408719 17282 0 3 0xc000080 fsleep syz-executor.3 39794 204046 17282 0 3 0xc000080 fsleep syz-executor.3 4320 91992 55063 0 2 0x8000002 syz-executor.6 90349 237582 1 0 3 0x8000080 nanoslp init 1007 446493 55063 0 2 0x8000002 syz-executor.4 40423 34815 55063 0 2 0x8000482 syz-executor.1 80169 259142 55063 0 2 0x8000002 syz-executor.2 81027 499611 55063 0 2 0x8000482 syz-executor.5 20498 211884 0 0 3 0x14200 acct acct 78598 145945 55063 0 2 0x8000002 syz-executor.0 17282 520482 55063 0 2 0x8000482 syz-executor.3 6293 175311 55063 0 2 0x8000482 syz-executor.7 23392 362167 0 0 3 0x14280 nfsidl nfsio 90204 192749 0 0 3 0x14280 nfsidl nfsio 92530 178202 0 0 3 0x14280 nfsidl nfsio 34872 6760 0 0 3 0x14280 nfsidl nfsio 75124 171600 0 0 3 0x14280 nfsidl nfsio 94414 61423 0 0 3 0x14280 nfsidl nfsio 94937 511760 0 0 3 0x14280 nfsidl nfsio 23713 332812 0 0 3 0x14280 nfsidl nfsio 89691 394935 0 0 3 0x14280 nfsidl nfsio 52891 20912 0 0 3 0x14280 nfsidl nfsio 93171 98053 0 0 3 0x14280 nfsidl nfsio 41776 384250 0 0 3 0x14280 nfsidl nfsio 91798 521880 0 0 3 0x14280 nfsidl nfsio 97752 127335 0 0 3 0x14280 nfsidl nfsio 49775 70193 0 0 3 0x14280 nfsidl nfsio 62450 454044 0 0 3 0x14280 nfsidl nfsio 7859 238132 0 0 3 0x14280 nfsidl nfsio 57654 29700 0 0 3 0x14280 nfsidl nfsio 88463 354652 0 0 3 0x14280 nfsidl nfsio 37036 5659 0 0 3 0x14280 nfsidl nfsio 71244 154251 0 0 3 0x14200 bored sosplice 9551 31445 7334 0 3 0x18100082 netio ndp 7334 332578 1 0 3 0x810008a sigsusp sh 55063 245864 56560 0 3 0x1a000082 wait syz-fuzzer 55063 44756 56560 0 2 0x1e000482 syz-fuzzer 55063 212763 56560 0 3 0x1e000082 thrsleep syz-fuzzer 55063 241406 56560 0 3 0x1e000082 wait syz-fuzzer 55063 21094 56560 0 3 0x1e000082 wait syz-fuzzer 55063 183442 56560 0 2 0x1e000482 syz-fuzzer 55063 33573 56560 0 3 0x1e000082 thrsleep syz-fuzzer 55063 455449 56560 0 3 0x1e000082 wait syz-fuzzer 55063 512579 56560 0 3 0x1e000082 thrsleep syz-fuzzer 55063 144373 56560 0 3 0x1e000082 thrsleep syz-fuzzer 55063 59912 56560 0 3 0x1e000082 thrsleep syz-fuzzer 55063 468448 56560 0 2 0x1e000002 syz-fuzzer 55063 5896 56560 0 3 0x1e000082 thrsleep syz-fuzzer 55063 323432 56560 0 3 0x1e000082 wait syz-fuzzer 55063 453789 56560 0 3 0x1e000082 wait syz-fuzzer 55063 450492 56560 0 3 0x1e000082 wait syz-fuzzer 55063 145517 56560 0 3 0x1e000082 wait syz-fuzzer 56560 7856 74223 0 3 0x810008a sigsusp ksh 74223 444979 54131 0 3 0x1800009a kqread sshd 54131 137350 1 0 3 0x18000088 kqread sshd 20447 156505 64874 74 2 0x19100092 pflogd 64874 394285 1 0 3 0x18000080 sbwait pflogd 44233 141984 93463 73 3 0x19100090 kqread syslogd 93463 214213 1 0 3 0x18100082 sbwait syslogd 10992 95202 1 0 3 0x18100080 kqread resolvd 6364 213359 11813 77 3 0x18100092 kqread dhcpleased 15097 142689 11813 77 3 0x18100092 kqread dhcpleased 11813 377755 1 0 3 0x18000080 kqread dhcpleased 41320 70896 0 0 3 0x14200 bored smr 91249 266294 0 0 2 0x14200 zerothread 22792 209841 0 0 3 0x14200 aiodoned aiodoned 19781 489279 0 0 2 0x14600 update 41925 413543 0 0 3 0x14200 cleaner cleaner 15660 130417 0 0 3 0x14200 reaper reaper 68827 180325 0 0 3 0x14200 pgdaemon pagedaemon 93762 290692 0 0 3 0x14200 bored viomb 47927 323018 0 0 3 0x40014200 acpi0 acpi0 53541 233048 0 0 3 0x40014200 idle1 92052 453932 0 0 3 0x14200 bored softnet3 54133 44893 0 0 3 0x14200 bored softnet2 73653 98491 0 0 3 0x14200 bored softnet1 48108 263767 0 0 2 0x14200 softnet0 *56654 172977 0 0 7 0x14200 systqmp 68111 377305 0 0 3 0x14200 bored systq 93549 191830 0 0 2 0x14200 softclockmp 36186 409413 0 0 2 0x40014200 softclock 1314 231849 0 0 3 0x40014200 idle0 1 85333 0 0 3 0x8000082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex sosppl r = 0 (0xffffffff82e29160) #0 witness_lock+0x446 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x446 sys/kern/subr_witness.c:1187 #1 mtx_enter_try+0x103 #2 pool_gc_pages+0xa7 pl_enter_try sys/kern/subr_pool.c:109 [inline] #2 pool_gc_pages+0xa7 sys/kern/subr_pool.c:1568 #3 taskq_thread+0xe5 sys/kern/kern_task.c:450 #4 proc_trampoline+0x10 Process 39911 (syz-executor.7) thread 0xffff80002d6d07e8 (154035) Process 80169 (syz-executor.2) thread 0xffff80002a2107d8 (259142) Process 78598 (syz-executor.0) thread 0xffff800033f5d4c0 (145945) Process 56654 (systqmp) thread 0xffff8000ffffea40 (172977) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10189 6501K 6753K 166960K 12460 0 pcb 15 12K 13K 166960K 395 0 rtable 172 9K 11K 166960K 2005 0 pf 33 9K 10K 166960K 216 0 ifaddr 36 14K 16K 166960K 277 0 ifgroup 58 2K 3K 166960K 370 0 sysctl 4 1K 1K 166960K 10 0 counters 64 36K 37K 166960K 220 0 ioctlops 0 0K 4K 166960K 1639 0 iov 0 0K 16K 166960K 305 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1377 87K 87K 166960K 3113 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 68 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 227 0 dirhash 12 2K 3K 166960K 69 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 15 53K 97K 166960K 3816 0 sigio 0 0K 0K 166960K 123 0 proc 65 79K 140K 166960K 2175 0 subproc 117 7K 7K 166960K 731 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 524 0 in_multi 62 4K 7K 166960K 721 0 ether_multi 1 0K 0K 166960K 17 0 mrt 2 0K 0K 166960K 9 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 1276 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 330 126K 139K 166960K 34131 0 UVM aobj 131 4K 5K 166960K 151 0 pinsyscall 39 78K 108K 166960K 6263 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 243 0 NDP 12 0K 2K 166960K 198 0 temp 76 6812K 6940K 166960K 112303 0 kqueue 12 18K 24K 166960K 430 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 120 375 0 371 1 0 1 1 0 8 0 rtentry 112 685 0 611 5 1 4 4 0 8 0 unpcb 144 2388 0 2371 8 7 1 2 0 8 0 syncache 336 31 0 31 6 6 0 1 0 8 0 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 207 0 207 7 7 0 1 0 8 0 tcpcb 808 1153 0 1142 10 5 5 5 0 8 3 arp 120 125 0 113 1 0 1 1 0 8 0 ipq 40 1 0 1 1 1 0 1 0 8 0 ipqe 40 3 0 3 1 1 0 1 0 8 0 inpcb 392 3715 0 3702 25 14 11 11 0 8 8 nd6 136 170 0 157 1 0 1 1 0 8 0 pkpcb 40 10 0 10 8 8 0 1 0 8 0 kcovpl 48 56 0 47 1 0 1 1 0 8 0 ppxss 1168 9 0 9 8 7 1 1 0 8 1 pffrag 232 29 0 25 2 1 1 1 0 482 0 pffrnode 88 29 0 25 2 1 1 1 0 8 0 pffrent 40 177 0 173 2 1 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 24 277 0 241 1 0 1 1 0 8 0 pfstkey 128 277 0 241 2 0 2 2 0 8 0 pfstate 376 277 0 241 9 2 7 7 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 3 0 2 2 1 1 2 0 8 0 art_heap4 256 2588 0 2279 43 22 21 29 0 8 0 art_table 32 2591 0 2281 4 0 4 4 0 8 0 art_node 16 672 0 606 1 0 1 1 0 8 0 sysvmsgpl 40 24 0 14 1 0 1 1 0 8 0 semupl 112 4 0 4 1 1 0 1 0 8 0 semapl 112 224 0 214 1 0 1 1 0 8 0 shmpl 112 148 0 20 4 0 4 4 0 8 0 dirhash 1024 55 0 38 3 0 3 3 0 8 0 dino2pl 256 6883 0 5358 97 0 97 97 0 8 0 ffsino 272 6883 0 5358 103 0 103 103 0 8 0 nchpl 144 12152 0 10412 67 1 66 67 0 8 0 uvmvnodes 80 7860 0 0 161 0 161 161 0 8 0 vnodes 216 7860 0 0 437 0 437 437 0 8 0 namei 1024 41963 0 41962 10 9 1 2 0 8 0 percpumem 16 124 0 78 1 0 1 1 0 8 0 vcpupl 2048 10 0 1 2 0 2 2 0 8 0 vmpool 696 20 0 11 1 0 1 1 0 8 0 kstatmem 264 180 0 156 3 0 3 3 0 8 0 scxspl 216 57639 0 57639 28 24 4 8 1 8 4 plimitpl 152 458 0 442 1 0 1 1 0 8 0 sigapl 424 4100 0 4029 10 1 9 9 0 8 0 futexpl 64 51088 0 51084 5 4 1 1 0 8 0 knotepl 120 581 0 0 11 0 11 11 0 8 0 kqueuepl 216 806 0 796 1 0 1 1 0 8 0 pipepl 320 747 0 716 8 5 3 6 0 8 0 fdescpl 496 4017 0 3989 5 0 5 5 0 8 0 filepl 152 22775 0 22512 19 5 14 14 0 8 2 lockfpl 104 1044 0 1042 1 0 1 1 0 8 0 lockfspl 48 424 0 422 1 0 1 1 0 8 0 sessionpl 144 81 0 64 1 0 1 1 0 8 0 pgrppl 48 131 0 114 1 0 1 1 0 8 0 ucredpl 104 3538 0 3523 1 0 1 1 0 8 0 zombiepl 144 4032 0 4029 4 3 1 1 0 8 0 processpl 1136 4100 0 4029 6 0 6 6 0 8 0 procpl 656 7985 0 7893 10 1 9 9 0 8 0 srpgc 96 36 0 36 11 11 0 1 0 8 0 sosppl 168 86 0 86 11 11 0 1 0 8 0 sosppl: pool(0xffffffff82e29150:sosppl): page inconsistency: page 0x0; at page head addr 0xfffffd806b1c7f90 (p 0xfffffd806b1c7000) sockpl 584 6542 0 6506 26 16 10 10 0 8 6 mcl64k 65536 12 0 0 2 0 2 2 0 8 0 mcl16k 16384 6 0 0 1 0 1 1 0 8 0 mcl12k 12288 10 0 0 1 0 1 1 0 8 0 mcl9k 9216 5 0 0 1 0 1 1 0 8 0 mcl8k 8192 9 0 0 2 0 2 2 0 8 0 mcl4k 4096 18 0 0 3 0 3 3 0 8 0 mcl2k2 2112 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 360 0 0 41 8 33 41 0 8 1 mtagpl 96 18 0 0 1 0 1 1 0 8 0 mbufpl 256 1209 0 0 59 0 59 59 0 8 0 bufpl 280 17835 0 9974 562 0 562 562 0 8 0 anonpl 24 576494 0 567393 208 148 60 100 0 186 0 amapchunkpl 152 106711 0 106093 97 65 32 51 0 158 0 amappl16 200 13728 0 13432 104 88 16 21 0 8 0 amappl15 192 9 0 9 1 1 0 1 0 8 0 amappl14 184 324 0 310 2 1 1 2 0 8 0 amappl13 176 11 0 11 2 2 0 1 0 8 0 amappl12 168 5429 0 5396 4 1 3 3 0 8 0 amappl11 160 60 0 45 1 0 1 1 0 8 0 amappl10 152 148 0 134 2 1 1 1 0 8 0 amappl9 144 198 0 197 1 0 1 1 0 8 0 amappl8 136 629 0 505 5 0 5 5 0 8 0 amappl7 128 148 0 131 1 0 1 1 0 8 0 amappl6 120 991 0 963 3 1 2 2 0 8 0 amappl5 112 413 0 397 1 0 1 1 0 8 0 amappl4 104 1128 0 1066 2 0 2 2 0 8 0 amappl3 96 21059 0 20985 3 0 3 3 0 8 0 amappl2 88 4730 0 4645 4 1 3 3 0 8 0 amappl1 80 26195 0 25660 25 11 14 23 0 8 0 amappl 88 32862 0 32681 7 1 6 6 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 72 150 0 20 3 0 3 3 0 8 0 uaddrrnd 24 4037 0 4000 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 4037 0 4000 1 0 1 1 0 8 0 vmmpekpl 168 31935 0 31864 4 0 4 4 0 8 0 vmmpepl 168 274228 0 272046 202 90 112 118 0 357 0 vmsppl 440 4036 0 4000 6 1 5 5 0 8 0 rwobjpl 56 77004 0 67575 139 6 133 133 0 8 0 pdppl 4096 8081 0 8009 411 331 80 90 0 8 8 pvpl 32 45338 0 0 366 0 366 366 0 265 0 pmappl 248 4036 0 4000 6 3 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 832 0 407 13 0 13 13 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace pool_gc_pages(0) at pool_gc_pages+0x1e1 pool_p_remove sys/kern/subr_pool.c:1049 [inline] pool_gc_pages(0) at pool_gc_pages+0x1e1 sys/kern/subr_pool.c:1576 taskq_thread(ffffffff82d3abc0) at taskq_thread+0xe5 sys/kern/kern_task.c:450 end trace frame: 0x0, count: -2 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffff800029cebff0) at x86_ipi_db+0x1e 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+0x27 uvm_map_lookup_entry(fffffd80603cb008,a16000,ffff800033f430f8) at uvm_map_lookup_entry+0x133 sys/uvm/uvm_map.c:1583 uvmfault_lookup(ffff800033f430d0,0) at uvmfault_lookup+0xea sys/uvm/uvm_fault.c:1785 uvm_fault_check(ffff800033f430d0,ffff800033f43108,ffff800033f43130) at uvm_fault_check+0x3e sys/uvm/uvm_fault.c:672 uvm_fault(fffffd80603cb008,a16000,0,2) at uvm_fault+0xf2 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff800033f43270,a160e0) at kpageflttrap+0x228 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff800033f43270) at kerntrap+0xf2 sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x57 syscall(ffff800033f436c0) at syscall+0x8cf mi_syscall sys/sys/syscall_mi.h:180 [inline] syscall(ffff800033f436c0) at syscall+0x8cf sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8b87b7c9200, count: 2 ddb{1}> trace x86_ipi_db(ffff800029cebff0) at x86_ipi_db+0x1e 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+0x27 uvm_map_lookup_entry(fffffd80603cb008,a16000,ffff800033f430f8) at uvm_map_lookup_entry+0x133 sys/uvm/uvm_map.c:1583 uvmfault_lookup(ffff800033f430d0,0) at uvmfault_lookup+0xea sys/uvm/uvm_fault.c:1785 uvm_fault_check(ffff800033f430d0,ffff800033f43108,ffff800033f43130) at uvm_fault_check+0x3e sys/uvm/uvm_fault.c:672 uvm_fault(fffffd80603cb008,a16000,0,2) at uvm_fault+0xf2 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff800033f43270,a160e0) at kpageflttrap+0x228 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff800033f43270) at kerntrap+0xf2 sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x57 syscall(ffff800033f436c0) at syscall+0x8cf mi_syscall sys/sys/syscall_mi.h:180 [inline] syscall(ffff800033f436c0) at syscall+0x8cf sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8b87b7c9200, count: -13