uvm_fault(0xfffffd807598c2f8, 0x668, 0, 2) -> e kernel: page fault trap, code=0 Stopped at pppacopen+0x1b5: movq %r13,0x668 TID PID UID PRFLAGS PFLAGS CPU COMMAND 139191 78469 0 0 0 0 syz-executor.1 * 24705 88814 0 0 0x4000000 1K syz-executor.0 pppacopen(86353,1,2000,ffff800021253a48) at pppacopen+0x1b5 sys/net/if_pppx.c:1020 spec_open(ffff800027b23c08) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd80697df410,1,fffffd807f7d7720,ffff800021253a48) at VOP_OPEN+0x75 sys/kern/vfs_vops.c:138 vn_open(ffff800027b23e58,1,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff800021253a48,ffffff9c,20000780,0,0,ffff800027b24040) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff800027b240b0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800027b240b0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x91b1ee71650, count: 8 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: uvm_fault(0xfffffd807598c2f8, 0x668, 0, 2) -> e ddb{1}> trace pppacopen(86353,1,2000,ffff800021253a48) at pppacopen+0x1b5 sys/net/if_pppx.c:1020 spec_open(ffff800027b23c08) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd80697df410,1,fffffd807f7d7720,ffff800021253a48) at VOP_OPEN+0x75 sys/kern/vfs_vops.c:138 vn_open(ffff800027b23e58,1,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff800021253a48,ffffff9c,20000780,0,0,ffff800027b24040) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff800027b240b0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800027b240b0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x91b1ee71650, count: -7 ddb{1}> show registers rdi 0xffff800021297000 rsi 0x85f rbp 0xffff800027b23b80 rbx 0 rdx 0xffff800021297000 rcx 0x85e rax 0xffffffff81c79ee5 pppacopen+0x1b5 r8 0x770 r9 0xfffffd807f7d7720 r10 0xda75a3e6aad9fb46 r11 0x8854b2622721c55a r12 0xfffffd80697df410 r13 0 r14 0x86353 acpi_pdirpa+0x721bb r15 0xffff800027b23c08 rip 0xffffffff81c79ee5 pppacopen+0x1b5 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800027b23b30 ss 0x10 pppacopen+0x1b5: movq %r13,0x668 ddb{1}> show proc PROC (syz-executor.0) pid=24705 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=80, nice=20 forw=0xffffffffffffffff, list=0xffff8000212527e8,0xffff800021253cf8 process=0xffff8000211f0860 user=0xffff800027b1f000, vmspace=0xfffffd807598c2f8 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 85366 264911 31096 0 2 0 syz-executor.3 85366 282242 31096 0 3 0x4000080 netio syz-executor.3 78469 139191 64237 0 7 0 syz-executor.1 78469 26013 64237 0 3 0x4000080 netio syz-executor.1 32648 479690 57824 0 2 0 syz-executor.2 32648 200992 57824 0 3 0x4000080 piperd syz-executor.2 32648 162432 57824 0 2 0x4000000 syz-executor.2 88814 315018 86633 0 2 0 syz-executor.0 *88814 24705 86633 0 7 0x4000000 syz-executor.0 31096 85999 79096 0 3 0x82 nanoslp syz-executor.3 33321 145547 1 0 3 0x100083 ttyin getty 57824 84513 79096 0 3 0x82 nanoslp syz-executor.2 7123 384142 0 0 3 0x14200 bored sosplice 64237 141137 79096 0 3 0x82 nanoslp syz-executor.1 86633 85585 79096 0 3 0x82 nanoslp syz-executor.0 79096 485844 9473 0 3 0x82 thrsleep syz-fuzzer 79096 178665 9473 0 3 0x4000082 thrsleep syz-fuzzer 79096 434273 9473 0 3 0x4000082 thrsleep syz-fuzzer 79096 103780 9473 0 3 0x4000082 thrsleep syz-fuzzer 79096 56300 9473 0 3 0x4000082 thrsleep syz-fuzzer 79096 147688 9473 0 3 0x4000082 thrsleep syz-fuzzer 79096 107219 9473 0 3 0x4000082 thrsleep syz-fuzzer 79096 521444 9473 0 3 0x4000082 kqread syz-fuzzer 9473 421914 98317 0 3 0x10008a sigsusp ksh 98317 170098 27356 0 3 0x9a poll sshd 27356 139169 1 0 3 0x88 poll sshd 34008 25236 35612 74 3 0x100092 bpf pflogd 35612 489491 1 0 3 0x80 netio pflogd 22928 90082 84672 73 3 0x100090 kqread syslogd 84672 361858 1 0 3 0x100082 netio syslogd 13470 333569 1 0 3 0x100080 kqread resolvd 31488 301132 93546 77 3 0x100092 kqread dhcpleased 768 159809 93546 77 3 0x100092 kqread dhcpleased 93546 165962 1 0 3 0x80 kqread dhcpleased 74815 357206 0 0 3 0x14200 bored smr 50210 31443 0 0 2 0x14200 zerothread 67414 460256 0 0 3 0x14200 aiodoned aiodoned 64641 417786 0 0 3 0x14200 syncer update 39603 219284 0 0 3 0x14200 cleaner cleaner 36890 278037 0 0 3 0x14200 reaper reaper 59345 441811 0 0 3 0x14200 pgdaemon pagedaemon 32808 441884 0 0 3 0x14200 bored viomb 10228 315106 0 0 3 0x40014200 acpi0 acpi0 2394 220833 0 0 3 0x40014200 idle1 41871 335487 0 0 3 0x14200 bored softnet 23613 258268 0 0 3 0x14200 bored systqmp 5283 207440 0 0 3 0x14200 bored systq 54188 283870 0 0 3 0x40014200 bored softclock 34628 405240 0 0 3 0x40014200 idle0 1 520332 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 88814 (syz-executor.0) thread 0xffff800021253a48 (24705) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff828f9c10) #0 witness_lock+0x44d #1 syscall+0x3ef mi_syscall sys/sys/syscall_mi.h:93 [inline] #1 syscall+0x3ef sys/arch/amd64/amd64/trap.c:585 #2 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10166 6470K 7050K 78643K 16282 0 pcb 13 8K 8K 78643K 262 0 rtable 177 17K 18K 78643K 890 0 ifaddr 67 16K 16K 78643K 375 0 counters 48 34K 34K 78643K 106 0 ioctlops 0 0K 4K 78643K 1851 0 iov 0 0K 12K 78643K 117 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1236 78K 78K 78643K 3038 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 33 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 194 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 10 33K 49K 78643K 5068 0 sigio 0 0K 0K 78643K 30 0 proc 72 87K 111K 78643K 681 0 subproc 52 3K 3K 78643K 85 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 381 0 in_multi 55 3K 4K 78643K 319 0 ether_multi 1 0K 0K 78643K 100 0 mrt 1 0K 0K 78643K 46 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 73 334K 334K 78643K 73 0 exec 0 0K 2K 78643K 617 0 pfkey data 0 0K 1K 78643K 4 0 tdb 3 0K 0K 78643K 3 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 337 343K 343K 78643K 61029 0 UVM aobj 56 7K 7K 78643K 83 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 269 0 NDP 8 0K 1K 78643K 67 0 temp 105 4215K 4327K 78643K 30050 0 kqueue 10 14K 22K 78643K 274 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> 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 120 213 0 210 1 0 1 1 0 8 0 rtentry 112 135 0 66 3 1 2 3 0 8 0 unpcb 136 858 0 835 2 1 1 2 0 8 0 syncache 296 57 0 57 6 5 1 1 0 8 1 tcpqe 32 38 0 38 6 6 0 1 0 8 0 tcpcb 736 867 0 857 15 12 3 6 0 8 1 arp 120 15 0 4 1 0 1 1 0 8 0 inpcb 304 2256 0 2242 5 3 2 2 0 8 0 rttmr 72 4 0 4 1 1 0 1 0 8 0 nd6 48 36 0 24 1 0 1 1 0 8 0 pkpcb 40 8 0 8 2 1 1 1 0 8 1 kcovpl 48 6 0 2 1 0 1 1 0 8 0 pfstscr 40 12 0 12 3 3 0 1 0 8 0 pffrag 232 6 0 4 2 1 1 1 0 482 0 pffrnode 88 6 0 4 2 1 1 1 0 8 0 pffrent 40 18 0 16 2 1 1 1 0 8 0 pfosfp 40 1429 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1429 0 714 21 0 21 21 0 8 0 pfrktable 1344 169 0 162 2 1 1 1 0 8 0 pftag 88 5 0 4 2 1 1 1 0 8 0 pfqueue 264 1 0 1 1 1 0 1 0 8 0 pfstitem 24 21 0 19 1 0 1 1 0 8 0 pfstkey 112 43 0 41 1 0 1 1 0 8 0 pfstate 320 31 0 29 2 1 1 2 0 8 0 pfrule 1360 254 0 198 6 1 5 5 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 375 0 88 18 0 18 18 0 8 0 art_table 32 376 0 88 3 0 3 3 0 8 0 art_node 16 121 0 58 1 0 1 1 0 8 0 sysvmsgpl 40 39 0 13 1 0 1 1 0 8 0 semapl 112 192 0 182 1 0 1 1 0 8 0 shmpl 112 80 0 27 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 7957 0 6540 89 0 89 89 0 8 0 ffsino 272 7957 0 6540 95 0 95 95 0 8 0 nchpl 144 13945 0 12336 61 0 61 61 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 224 5926 0 0 349 0 349 349 0 8 0 namei 1024 35059 0 35059 1 0 1 1 0 8 1 percpumem 16 65 0 29 1 0 1 1 0 8 0 vcpupl 2048 18 0 0 3 0 3 3 0 8 0 vmpool 560 18 0 0 2 0 2 2 0 8 0 pfiaddrpl 120 62 0 43 2 1 1 1 0 8 0 scsiplug 72 4 0 4 1 1 0 1 0 8 0 scxspl 216 41231 0 41231 11 10 1 8 0 8 1 plimitpl 152 285 0 274 1 0 1 1 0 8 0 sigapl 424 5302 0 5264 5 0 5 5 0 8 0 futexpl 64 30088 0 30088 1 0 1 1 0 8 1 knotepl 112 72 0 0 3 0 3 3 0 8 0 kqueuepl 216 565 0 559 1 0 1 1 0 8 0 pipepl 336 299 0 282 3 1 2 3 0 8 0 fdescpl 496 5287 0 5264 4 1 3 4 0 8 0 filepl 152 16003 0 15840 10 3 7 9 0 8 0 lockfpl 104 733 0 731 1 0 1 1 0 8 0 lockfspl 48 300 0 298 1 0 1 1 0 8 0 sessionpl 144 23 0 10 1 0 1 1 0 8 0 pgrppl 48 23 0 10 1 0 1 1 0 8 0 ucredpl 96 2618 0 2605 1 0 1 1 0 8 0 zombiepl 144 5264 0 5264 1 0 1 1 0 8 1 processpl 1064 5302 0 5264 3 0 3 3 0 8 0 procpl 672 10812 0 10762 5 0 5 5 0 8 0 sosppl 168 143 0 143 4 3 1 1 0 8 1 sockpl 480 3368 0 3329 13 7 6 7 0 8 1 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 7 0 0 1 0 1 1 0 8 0 mcl12k 12288 15 0 0 2 0 2 2 0 8 0 mcl9k 9216 10 0 0 1 0 1 1 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 236 0 0 18 2 16 18 0 8 1 mtagpl 96 586 0 0 15 0 15 15 0 8 0 mbufpl 256 1510 0 0 92 1 91 91 0 8 0 bufpl 288 10836 0 4492 454 0 454 454 0 8 0 anonpl 24 1320208 0 1310955 95 35 60 78 0 186 2 amapchunkpl 152 144058 0 143507 31 9 22 23 0 158 0 amappl16 200 11910 0 11684 34 20 14 23 0 8 2 amappl15 192 235 0 234 1 0 1 1 0 8 0 amappl14 184 1211 0 1209 1 0 1 1 0 8 0 amappl13 176 53 0 52 1 0 1 1 0 8 0 amappl12 168 18 0 15 1 0 1 1 0 8 0 amappl11 160 1285 0 1268 1 0 1 1 0 8 0 amappl10 152 1318 0 1305 1 0 1 1 0 8 0 amappl9 144 1529 0 1525 1 0 1 1 0 8 0 amappl8 136 498 0 433 3 0 3 3 0 8 0 amappl7 128 88 0 76 1 0 1 1 0 8 0 amappl6 120 1211 0 1192 1 0 1 1 0 8 0 amappl5 112 6430 0 6406 1 0 1 1 0 8 0 amappl4 104 1923 0 1897 1 0 1 1 0 8 0 amappl3 96 232 0 216 1 0 1 1 0 8 0 amappl2 88 483 0 432 2 0 2 2 0 8 0 amappl1 80 90267 0 89753 13 2 11 13 0 8 0 amappl 88 60510 0 60293 6 1 5 5 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 82 0 27 1 0 1 1 0 8 0 uaddrrnd 24 5305 0 5264 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 5305 0 5264 1 0 1 1 0 8 0 vmmpekpl 168 28129 0 28091 2 0 2 2 0 8 0 vmmpepl 168 458892 0 457006 106 21 85 88 0 357 2 vmsppl 368 5304 0 5264 4 0 4 4 0 8 0 rwobjpl 56 106351 0 99245 105 4 101 102 0 8 0 pdppl 4096 10618 0 10546 96 24 72 72 0 8 0 pvpl 32 2512530 0 2499370 216 102 114 141 0 265 6 pmappl 248 5304 0 5264 3 0 3 3 0 8 0 extentpl 40 57 0 38 1 0 1 1 0 8 0 phpool 112 911 0 43 25 0 25 25 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff82779ff0) at x86_ipi_db+0x1a 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+0x23 end of kernel end trace frame: 0x7f7ffffed740, count: 12 ddb{0}> trace x86_ipi_db(ffffffff82779ff0) at x86_ipi_db+0x1a 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+0x23 end of kernel end trace frame: 0x7f7ffffed740, count: -3 ddb{0}> machine ddbcpu 1 Stopped at pppacopen+0x1b5: movq %r13,0x668 pppacopen(86353,1,2000,ffff800021253a48) at pppacopen+0x1b5 sys/net/if_pppx.c:1020 spec_open(ffff800027b23c08) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd80697df410,1,fffffd807f7d7720,ffff800021253a48) at VOP_OPEN+0x75 sys/kern/vfs_vops.c:138 vn_open(ffff800027b23e58,1,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff800021253a48,ffffff9c,20000780,0,0,ffff800027b24040) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff800027b240b0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800027b240b0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x91b1ee71650, count: 8 ddb{1}> trace pppacopen(86353,1,2000,ffff800021253a48) at pppacopen+0x1b5 sys/net/if_pppx.c:1020 spec_open(ffff800027b23c08) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd80697df410,1,fffffd807f7d7720,ffff800021253a48) at VOP_OPEN+0x75 sys/kern/vfs_vops.c:138 vn_open(ffff800027b23e58,1,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff800021253a48,ffffff9c,20000780,0,0,ffff800027b24040) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff800027b240b0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800027b240b0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x91b1ee71650, count: -7