uvm_fault(0xfffffd8069a45b90, 0x668, 0, 2) -> e kernel: page fault trap, code=0 Stopped at pppacopen+0x1b5: movq %r13,0x668 TID PID UID PRFLAGS PFLAGS CPU COMMAND 428638 74357 0 0 0 1 syz-executor.1 *294397 74357 0 0 0x4000000 0K syz-executor.1 pppacopen(6338,3,2000,ffff80002128cfc8) at pppacopen+0x1b5 sys/net/if_pppx.c:1020 spec_open(ffff8000246e92f8) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd8076ef1eb0,3,fffffd807f7d78a0,ffff80002128cfc8) at VOP_OPEN+0x75 sys/kern/vfs_vops.c:138 vn_open(ffff8000246e9990,3,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 vndioctl(2902,c0384600,ffff8000246e9cc0,1,ffff80002128cfc8) at vndioctl+0xa07 sys/dev/vnd.c:459 VOP_IOCTL(fffffd806f279768,c0384600,ffff8000246e9cc0,1,fffffd807f7d78a0,ffff80002128cfc8) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8066eaf1e8,c0384600,ffff8000246e9cc0,ffff80002128cfc8) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:531 sys_ioctl(ffff80002128cfc8,ffff8000246e9dd8,ffff8000246e9e30) at sys_ioctl+0x4a2 syscall(ffff8000246e9ea0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000246e9ea0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x219da4db1b0, count: 5 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(0xfffffd8069a45b90, 0x668, 0, 2) -> e ddb{0}> trace pppacopen(6338,3,2000,ffff80002128cfc8) at pppacopen+0x1b5 sys/net/if_pppx.c:1020 spec_open(ffff8000246e92f8) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd8076ef1eb0,3,fffffd807f7d78a0,ffff80002128cfc8) at VOP_OPEN+0x75 sys/kern/vfs_vops.c:138 vn_open(ffff8000246e9990,3,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 vndioctl(2902,c0384600,ffff8000246e9cc0,1,ffff80002128cfc8) at vndioctl+0xa07 sys/dev/vnd.c:459 VOP_IOCTL(fffffd806f279768,c0384600,ffff8000246e9cc0,1,fffffd807f7d78a0,ffff80002128cfc8) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8066eaf1e8,c0384600,ffff8000246e9cc0,ffff80002128cfc8) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:531 sys_ioctl(ffff80002128cfc8,ffff8000246e9dd8,ffff8000246e9e30) at sys_ioctl+0x4a2 syscall(ffff8000246e9ea0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000246e9ea0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x219da4db1b0, count: -10 ddb{0}> show registers rdi 0xffff800022c94000 rsi 0xb91 rbp 0xffff8000246e9270 rbx 0 rdx 0xffff800022c94000 rcx 0xb90 rax 0xffffffff81c79ee5 pppacopen+0x1b5 r8 0x770 r9 0xfffffd807f7d78a0 r10 0x5decc3fca8c68a36 r11 0x9277f5e521850849 r12 0xfffffd8076ef1eb0 r13 0 r14 0x6338 __ALIGN_SIZE+0x5338 r15 0xffff8000246e92f8 rip 0xffffffff81c79ee5 pppacopen+0x1b5 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000246e9220 ss 0x10 pppacopen+0x1b5: movq %r13,0x668 ddb{0}> show proc PROC (syz-executor.1) pid=294397 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=54, nice=20 forw=0xffffffffffffffff, list=0xffff80002128c7e8,0xffff80002128c2b8 process=0xffff8000ffffba38 user=0xffff8000246e4000, vmspace=0xfffffd8069a45b90 estcpu=4, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 32513 415687 8806 0 2 0 syz-executor.0 32513 147000 8806 0 2 0x4000000 syz-executor.0 97407 461706 46714 0 2 0 syz-executor.3 97407 390915 46714 0 2 0x4000000 syz-executor.3 74357 428638 14063 0 7 0 syz-executor.1 *74357 294397 14063 0 7 0x4000000 syz-executor.1 61236 230845 65358 0 2 0 syz-executor.2 61236 372343 65358 0 3 0x4000080 netio syz-executor.2 65358 471083 44332 0 3 0x82 nanoslp syz-executor.2 46714 509143 44332 0 3 0x82 nanoslp syz-executor.3 14063 81125 44332 0 3 0x82 nanoslp syz-executor.1 8806 136299 44332 0 3 0x82 nanoslp syz-executor.0 44332 179115 93259 0 3 0x82 thrsleep syz-fuzzer 44332 446823 93259 0 3 0x4000082 thrsleep syz-fuzzer 44332 65591 93259 0 3 0x4000082 thrsleep syz-fuzzer 44332 415665 93259 0 3 0x4000082 thrsleep syz-fuzzer 44332 383539 93259 0 3 0x4000082 thrsleep syz-fuzzer 44332 393838 93259 0 3 0x4000082 thrsleep syz-fuzzer 44332 272859 93259 0 3 0x4000082 thrsleep syz-fuzzer 44332 328409 93259 0 3 0x4000082 kqread syz-fuzzer 93259 296441 61824 0 3 0x10008a sigsusp ksh 61824 72701 63331 0 3 0x9a poll sshd 47411 399218 1 0 3 0x100083 ttyin getty 63331 333164 1 0 3 0x88 poll sshd 39050 274440 33561 74 3 0x100092 bpf pflogd 33561 134332 1 0 3 0x80 netio pflogd 93734 241189 24881 73 3 0x100090 kqread syslogd 24881 93932 1 0 3 0x100082 netio syslogd 65740 256466 1 0 3 0x100080 kqread resolvd 67732 308333 71917 77 3 0x100092 kqread dhcpleased 54962 137712 71917 77 3 0x100092 kqread dhcpleased 71917 394346 1 0 3 0x80 kqread dhcpleased 39848 43711 0 0 3 0x14200 bored smr 64166 152340 0 0 2 0x14200 zerothread 84268 433286 0 0 3 0x14200 aiodoned aiodoned 45429 393611 0 0 3 0x14200 syncer update 17980 190816 0 0 3 0x14200 cleaner cleaner 235 226914 0 0 3 0x14200 reaper reaper 96956 276276 0 0 3 0x14200 pgdaemon pagedaemon 29296 432482 0 0 3 0x14200 bored viomb 53831 389390 0 0 3 0x40014200 acpi0 acpi0 64375 429013 0 0 3 0x40014200 idle1 39560 271444 0 0 3 0x14200 bored softnet 17539 481816 0 0 3 0x14200 bored systqmp 18223 370866 0 0 3 0x14200 bored systq 98013 252322 0 0 3 0x40014200 bored softclock 87971 182479 0 0 3 0x40014200 idle0 1 33831 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 74357 (syz-executor.1) thread 0xffff80002128cfc8 (294397) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff828f9c10) #0 witness_lock+0x44d #1 vn_ioctl+0x41 sys/kern/vfs_vnops.c:514 #2 sys_ioctl+0x4a2 #3 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #3 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #4 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10166 6531K 6787K 78643K 11635 0 pcb 13 8K 8K 78643K 17 0 rtable 150 4K 4K 78643K 239 0 ifaddr 58 13K 13K 78643K 65 0 counters 48 34K 34K 78643K 50 0 ioctlops 0 0K 4K 78643K 1501 0 iov 0 0K 0K 78643K 9 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1233 78K 78K 78643K 1357 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 1K 78643K 2 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 30 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 10 33K 49K 78643K 339 0 proc 67 87K 111K 78643K 408 0 subproc 52 3K 3K 78643K 52 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 21 0 in_multi 55 3K 3K 78643K 55 0 ether_multi 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 37 175K 175K 78643K 37 0 exec 0 0K 2K 78643K 457 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 261 63K 63K 78643K 5510 0 UVM aobj 3 2K 2K 78643K 3 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 10 0 NDP 8 0K 1K 78643K 17 0 temp 60 4189K 4257K 78643K 4499 0 kqueue 10 14K 16K 78643K 15 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 plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 42 0 39 1 0 1 1 0 8 0 rtentry 112 67 0 1 2 0 2 2 0 8 0 unpcb 136 95 0 78 1 0 1 1 0 8 0 syncache 296 9 0 9 2 1 1 1 0 8 1 tcpcb 736 50 0 43 2 0 2 2 0 8 0 arp 120 10 0 0 1 0 1 1 0 8 0 inpcb 304 119 0 112 1 0 1 1 0 8 0 nd6 48 12 0 0 1 0 1 1 0 8 0 kcovpl 48 4 0 0 1 0 1 1 0 8 0 pffrag 232 1 0 0 1 0 1 1 0 482 0 pffrnode 88 1 0 0 1 0 1 1 0 8 0 pffrent 40 1 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 pfstitem 24 11 0 0 1 0 1 1 0 8 0 pfstkey 112 11 0 0 1 0 1 1 0 8 0 pfstate 320 11 0 0 1 0 1 1 0 8 0 pfrule 1360 31 0 24 2 0 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 277 0 0 18 0 18 18 0 8 0 art_table 32 278 0 0 3 0 3 3 0 8 0 art_node 16 66 0 6 1 0 1 1 0 8 0 semapl 112 28 0 18 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1795 0 380 89 0 89 89 0 8 0 ffsino 272 1795 0 380 95 0 95 95 0 8 0 nchpl 144 2319 0 693 61 0 61 61 0 8 0 uvmvnodes 80 1939 0 0 40 0 40 40 0 8 0 vnodes 224 1939 0 0 115 0 115 115 0 8 0 namei 1024 6356 0 6356 1 0 1 1 0 8 1 percpumem 16 37 0 1 1 0 1 1 0 8 0 vcpupl 2048 1 0 0 1 0 1 1 0 8 0 vmpool 560 1 0 0 1 0 1 1 0 8 0 scxspl 216 6883 0 6883 9 1 8 8 0 8 8 plimitpl 152 23 0 12 1 0 1 1 0 8 0 sigapl 424 577 0 540 5 0 5 5 0 8 0 futexpl 64 1455 0 1455 1 0 1 1 0 8 1 knotepl 112 70 0 0 2 0 2 2 0 8 0 kqueuepl 216 20 0 14 1 0 1 1 0 8 0 pipepl 336 88 0 72 2 0 2 2 0 8 0 fdescpl 496 563 0 540 4 1 3 4 0 8 0 filepl 152 1913 0 1759 7 0 7 7 0 8 1 lockfpl 104 16 0 14 1 0 1 1 0 8 0 lockfspl 48 9 0 7 1 0 1 1 0 8 0 sessionpl 144 20 0 7 1 0 1 1 0 8 0 pgrppl 48 20 0 7 1 0 1 1 0 8 0 ucredpl 96 122 0 110 1 0 1 1 0 8 0 zombiepl 144 540 0 540 1 0 1 1 0 8 1 processpl 1064 577 0 540 3 0 3 3 0 8 0 procpl 672 898 0 850 5 0 5 5 0 8 0 sockpl 480 256 0 229 4 0 4 4 0 8 0 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 8 0 0 1 0 1 1 0 8 0 mcl2k 2048 195 0 0 24 0 24 24 0 8 0 mtagpl 96 55 0 0 2 0 2 2 0 8 0 mbufpl 256 327 0 0 20 0 20 20 0 8 0 bufpl 288 3871 0 141 267 0 267 267 0 8 0 anonpl 24 124366 0 109329 95 3 92 92 0 186 0 amapchunkpl 152 13164 0 12457 34 3 31 32 0 158 1 amappl16 200 1187 0 758 24 0 24 24 0 8 0 amappl15 192 85 0 84 1 0 1 1 0 8 0 amappl14 184 69 0 68 1 0 1 1 0 8 0 amappl13 176 181 0 175 1 0 1 1 0 8 0 amappl12 168 20 0 18 1 0 1 1 0 8 0 amappl11 160 48 0 34 1 0 1 1 0 8 0 amappl10 152 50 0 42 1 0 1 1 0 8 0 amappl9 144 476 0 474 1 0 1 1 0 8 0 amappl8 136 374 0 335 2 0 2 2 0 8 0 amappl7 128 79 0 67 1 0 1 1 0 8 0 amappl6 120 157 0 141 1 0 1 1 0 8 0 amappl5 112 369 0 350 1 0 1 1 0 8 0 amappl4 104 598 0 575 1 0 1 1 0 8 0 amappl3 96 231 0 211 1 0 1 1 0 8 0 amappl2 88 500 0 457 2 1 1 2 0 8 0 amappl1 80 13026 0 12523 13 1 12 13 0 8 0 amappl 88 5170 0 4967 5 0 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 564 0 540 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 564 0 540 1 0 1 1 0 8 0 vmmpekpl 168 7841 0 7813 2 0 2 2 0 8 0 vmmpepl 168 53949 0 51942 102 1 101 102 0 357 13 vmsppl 368 563 0 540 3 0 3 3 0 8 0 rwobjpl 56 15935 0 12725 46 0 46 46 0 8 0 pdppl 4096 1136 0 1081 76 20 56 62 0 8 1 pvpl 32 300993 0 282250 155 1 154 154 0 265 2 pmappl 248 563 0 540 2 0 2 2 0 8 0 extentpl 40 57 0 38 1 0 1 1 0 8 0 phpool 112 610 0 22 17 0 17 17 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace pppacopen(6338,3,2000,ffff80002128cfc8) at pppacopen+0x1b5 sys/net/if_pppx.c:1020 spec_open(ffff8000246e92f8) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd8076ef1eb0,3,fffffd807f7d78a0,ffff80002128cfc8) at VOP_OPEN+0x75 sys/kern/vfs_vops.c:138 vn_open(ffff8000246e9990,3,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 vndioctl(2902,c0384600,ffff8000246e9cc0,1,ffff80002128cfc8) at vndioctl+0xa07 sys/dev/vnd.c:459 VOP_IOCTL(fffffd806f279768,c0384600,ffff8000246e9cc0,1,fffffd807f7d78a0,ffff80002128cfc8) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8066eaf1e8,c0384600,ffff8000246e9cc0,ffff80002128cfc8) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:531 sys_ioctl(ffff80002128cfc8,ffff8000246e9dd8,ffff8000246e9e30) at sys_ioctl+0x4a2 syscall(ffff8000246e9ea0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000246e9ea0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x219da4db1b0, count: -10 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020d38ff0) 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 copyout() at copyout+0x49 syscall(ffff8000246c5e60) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000246c5e60) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff65f0, count: 9 ddb{1}> trace x86_ipi_db(ffff800020d38ff0) 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 copyout() at copyout+0x49 syscall(ffff8000246c5e60) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000246c5e60) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff65f0, count: -6