uvm_fault(0xfffffd807bc765d8, 0x668, 0, 2) -> e kernel: page fault trap, code=0 Stopped at pppacopen+0x1b5: movq %r13,0x668 TID PID UID PRFLAGS PFLAGS CPU COMMAND * 77410 34830 0 0 0x4000000 0K syz-executor.2 501833 67558 0 0x2 0 1 syz-fuzzer pppacopen(86353,1,2000,ffff800027b0bce0) at pppacopen+0x1b5 sys/net/if_pppx.c:1020 spec_open(ffff800027b833a8) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd806d8de2b8,1,fffffd807f7d7720,ffff800027b0bce0) at VOP_OPEN+0x75 sys/kern/vfs_vops.c:138 vn_open(ffff800027b835f8,1,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff800027b0bce0,ffffff9c,20000780,0,0,ffff800027b837e0) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff800027b83850) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800027b83850) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x393ff938c00, 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: uvm_fault(0xfffffd807bc765d8, 0x668, 0, 2) -> e ddb{0}> trace pppacopen(86353,1,2000,ffff800027b0bce0) at pppacopen+0x1b5 sys/net/if_pppx.c:1020 spec_open(ffff800027b833a8) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd806d8de2b8,1,fffffd807f7d7720,ffff800027b0bce0) at VOP_OPEN+0x75 sys/kern/vfs_vops.c:138 vn_open(ffff800027b835f8,1,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff800027b0bce0,ffffff9c,20000780,0,0,ffff800027b837e0) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff800027b83850) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800027b83850) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x393ff938c00, count: -7 ddb{0}> show registers rdi 0xffff8000248db000 rsi 0x96e rbp 0xffff800027b83320 rbx 0 rdx 0xffff8000248db000 rcx 0x96d rax 0xffffffff81c79ee5 pppacopen+0x1b5 r8 0x770 r9 0xfffffd807f7d7720 r10 0xbedc443fa61d4763 r11 0x494386e781c51049 r12 0xfffffd806d8de2b8 r13 0 r14 0x86353 acpi_pdirpa+0x721bb r15 0xffff800027b833a8 rip 0xffffffff81c79ee5 pppacopen+0x1b5 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800027b832d0 ss 0x10 pppacopen+0x1b5: movq %r13,0x668 ddb{0}> show proc PROC (syz-executor.2) pid=77410 stat=onproc flags process=0 proc=4000000 pri=63, usrpri=63, nice=20 forw=0xffffffffffffffff, list=0xffff800027b0a7e0,0xffff800027b0ad30 process=0xffff8000ffff90a8 user=0xffff800027b7e000, vmspace=0xfffffd807bc765d8 estcpu=13, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 10910 482297 70705 0 2 0 syz-executor.3 10910 121694 70705 0 2 0x4000000 syz-executor.3 34830 229612 41624 0 2 0 syz-executor.2 34830 121171 41624 0 3 0x4000080 fsleep syz-executor.2 *34830 77410 41624 0 7 0x4000000 syz-executor.2 38865 359926 22950 0 2 0 syz-executor.1 38865 138996 22950 0 2 0x4000000 syz-executor.1 41624 497514 67558 0 3 0x82 nanoslp syz-executor.2 22114 120179 0 0 3 0x14280 nfsidl nfsio 53880 16619 0 0 3 0x14280 nfsidl nfsio 79909 206260 0 0 3 0x14280 nfsidl nfsio 79239 456012 0 0 3 0x14280 nfsidl nfsio 55305 276379 0 0 3 0x14280 nfsidl nfsio 99857 519865 0 0 3 0x14280 nfsidl nfsio 14912 463511 0 0 3 0x14280 nfsidl nfsio 98196 363217 0 0 3 0x14280 nfsidl nfsio 91056 403288 0 0 3 0x14280 nfsidl nfsio 83181 288799 0 0 3 0x14280 nfsidl nfsio 10742 34632 0 0 3 0x14280 nfsidl nfsio 36858 428050 0 0 3 0x14280 nfsidl nfsio 38802 316538 0 0 3 0x14280 nfsidl nfsio 58533 503202 0 0 3 0x14280 nfsidl nfsio 36744 404589 0 0 3 0x14280 nfsidl nfsio 7720 332781 0 0 3 0x14280 nfsidl nfsio 16653 516968 0 0 3 0x14280 nfsidl nfsio 11 189333 0 0 3 0x14280 nfsidl nfsio 19010 143910 0 0 3 0x14280 nfsidl nfsio 35884 186554 0 0 3 0x14280 nfsidl nfsio 88383 326154 1 0 3 0x100083 ttyin getty 70705 39229 67558 0 3 0x82 nanoslp syz-executor.3 14901 221366 0 0 3 0x14200 bored sosplice 22950 314848 67558 0 3 0x82 nanoslp syz-executor.1 54520 271312 67558 0 2 0x2 syz-executor.0 67558 501833 93067 0 7 0x2 syz-fuzzer 67558 318122 93067 0 3 0x4000082 nanoslp syz-fuzzer 67558 41641 93067 0 3 0x4000082 thrsleep syz-fuzzer 67558 373107 93067 0 3 0x4000082 thrsleep syz-fuzzer 67558 46376 93067 0 3 0x4000082 thrsleep syz-fuzzer 67558 240159 93067 0 3 0x4000082 thrsleep syz-fuzzer 67558 222808 93067 0 3 0x4000082 thrsleep syz-fuzzer 67558 282003 93067 0 3 0x4000082 nanoslp syz-fuzzer 93067 497992 89904 0 3 0x10008a sigsusp ksh 89904 167330 22743 0 3 0x9a poll sshd 22743 222835 1 0 3 0x88 poll sshd 622 150458 52513 74 3 0x100092 bpf pflogd 52513 256296 1 0 3 0x80 netio pflogd 21503 198798 80232 73 3 0x100090 kqread syslogd 80232 23439 1 0 3 0x100082 netio syslogd 18895 249925 1 0 3 0x100080 kqread resolvd 48993 261712 37025 77 3 0x100092 kqread dhcpleased 1520 490084 37025 77 3 0x100092 kqread dhcpleased 37025 473398 1 0 3 0x80 kqread dhcpleased 9375 113546 0 0 3 0x14200 bored smr 94165 296475 0 0 2 0x14200 zerothread 57667 120047 0 0 3 0x14200 aiodoned aiodoned 77360 189071 0 0 3 0x14200 syncer update 63578 289670 0 0 3 0x14200 cleaner cleaner 79657 277964 0 0 3 0x14200 reaper reaper 87644 299514 0 0 3 0x14200 pgdaemon pagedaemon 91223 410208 0 0 3 0x14200 bored viomb 98782 292843 0 0 3 0x40014200 acpi0 acpi0 31416 113559 0 0 3 0x40014200 idle1 30275 14459 0 0 3 0x14200 bored softnet 93952 252769 0 0 3 0x14200 bored systqmp 86724 81013 0 0 3 0x14200 bored systq 58826 57667 0 0 3 0x40014200 bored softclock 4398 301555 0 0 3 0x40014200 idle0 1 493837 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 34830 (syz-executor.2) thread 0xffff800027b0bce0 (77410) 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 Process 67558 (syz-fuzzer) thread 0xffff8000ffff6550 (501833) exclusive rwlock pipelk r = 0 (0xfffffd806fa8ae50) #0 witness_lock+0x44d #1 pipe_write+0x37d sys/kern/sys_pipe.c:581 #2 dofilewritev+0x19c sys/kern/sys_generic.c:380 #3 sys_write+0x83 sys/kern/sys_generic.c:300 #4 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #4 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #5 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10163 6470K 6916K 78643K 13683 0 pcb 13 8K 8K 78643K 150 0 rtable 136 6K 9K 78643K 545 0 ifaddr 60 13K 15K 78643K 144 0 sysctl 2 0K 0K 78643K 3 0 counters 48 34K 34K 78643K 64 0 ioctlops 0 0K 4K 78643K 1667 0 iov 0 0K 16K 78643K 80 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1233 78K 78K 78643K 2020 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 28 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 9 29K 49K 78643K 2541 0 sigio 0 0K 0K 78643K 23 0 proc 70 87K 124K 78643K 534 0 subproc 52 3K 3K 78643K 82 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 181 0 in_multi 47 3K 4K 78643K 181 0 ether_multi 1 0K 0K 78643K 32 0 mrt 0 0K 0K 78643K 30 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 55 254K 254K 78643K 55 0 exec 0 0K 2K 78643K 558 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 280 166K 171K 78643K 31273 0 UVM aobj 13 3K 4K 78643K 14 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 138 0 NDP 8 0K 1K 78643K 35 0 temp 99 4203K 4271K 78643K 11760 0 kqueue 10 14K 24K 78643K 175 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 120 104 0 101 1 0 1 1 0 8 0 rtentry 112 116 0 64 2 0 2 2 0 8 0 unpcb 136 509 0 494 1 0 1 1 0 8 0 syncache 296 36 0 36 6 5 1 1 0 8 1 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 250 0 250 5 4 1 2 0 8 1 tcpcb 736 463 0 458 8 6 2 4 0 8 1 arp 120 16 0 4 1 0 1 1 0 8 0 inpcb 304 1151 0 1143 2 0 2 2 0 8 0 rttmr 72 12 0 12 3 3 0 1 0 8 0 nd6 48 25 0 17 1 0 1 1 0 8 0 pkpcb 40 5 0 5 2 2 0 1 0 8 0 kcovpl 48 6 0 2 1 0 1 1 0 8 0 pfstscr 40 6 0 6 3 2 1 1 0 8 1 pffrag 232 8 0 6 1 0 1 1 0 482 0 pffrnode 88 8 0 6 1 0 1 1 0 8 0 pffrent 40 266 0 264 1 0 1 1 0 8 0 pfosfp 40 1430 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1430 0 714 21 0 21 21 0 8 0 pfrktable 1344 61 0 56 3 2 1 1 0 8 0 pftag 88 11 0 11 2 2 0 1 0 8 0 pfstitem 24 20 0 16 1 0 1 1 0 8 0 pfstkey 112 30 0 26 1 0 1 1 0 8 0 pfstate 320 24 0 20 2 0 2 2 0 8 0 pfrule 1360 107 0 84 3 0 3 3 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 435 0 185 19 2 17 18 0 8 0 art_table 32 436 0 185 3 0 3 3 0 8 0 art_node 16 115 0 69 1 0 1 1 0 8 0 sysvmsgpl 40 49 0 28 1 0 1 1 0 8 0 semupl 112 8 0 8 2 2 0 1 0 8 0 semapl 112 10 0 0 1 0 1 1 0 8 0 shmpl 112 11 0 1 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 4510 0 3097 89 0 89 89 0 8 0 ffsino 272 4510 0 3097 95 0 95 95 0 8 0 nchpl 144 7488 0 5886 61 0 61 61 0 8 0 uvmvnodes 80 5141 0 0 105 0 105 105 0 8 0 vnodes 224 5141 0 0 303 0 303 303 0 8 0 namei 1024 18822 0 18822 1 0 1 1 0 8 1 percpumem 16 44 0 8 1 0 1 1 0 8 0 vcpupl 2048 14 0 0 2 0 2 2 0 8 0 vmpool 560 14 0 0 1 0 1 1 0 8 0 pfiaddrpl 120 21 0 13 1 0 1 1 0 8 0 scsiplug 72 4 0 4 1 1 0 1 0 8 0 scxspl 216 23957 0 23957 14 13 1 8 0 8 1 plimitpl 152 77 0 65 1 0 1 1 0 8 0 sigapl 424 2795 0 2738 7 0 7 7 0 8 0 futexpl 64 12728 0 12727 1 0 1 1 0 8 0 knotepl 112 88 0 0 3 0 3 3 0 8 0 kqueuepl 216 227 0 221 1 0 1 1 0 8 0 pipepl 336 157 0 141 2 0 2 2 0 8 0 fdescpl 496 2760 0 2738 4 1 3 4 0 8 0 filepl 152 7767 0 7616 9 2 7 7 0 8 1 lockfpl 104 376 0 374 1 0 1 1 0 8 0 lockfspl 48 135 0 133 1 0 1 1 0 8 0 sessionpl 144 23 0 10 1 0 1 1 0 8 0 pgrppl 48 32 0 19 1 0 1 1 0 8 0 ucredpl 96 847 0 835 1 0 1 1 0 8 0 zombiepl 144 2738 0 2738 1 0 1 1 0 8 1 processpl 1064 2795 0 2738 4 0 4 4 0 8 0 procpl 672 5482 0 5414 7 1 6 6 0 8 0 sosppl 168 25 0 25 2 1 1 1 0 8 1 sockpl 480 1769 0 1743 8 3 5 6 0 8 1 mcl64k 65536 21 0 0 3 0 3 3 0 8 0 mcl16k 16384 9 0 0 2 0 2 2 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 7 0 0 1 0 1 1 0 8 0 mcl4k 4096 7 0 0 1 0 1 1 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 234 0 0 29 0 29 29 0 8 0 mtagpl 96 236 0 0 6 0 6 6 0 8 0 mbufpl 256 1296 0 0 78 0 78 78 0 8 0 bufpl 288 8389 0 2045 454 0 454 454 0 8 0 anonpl 24 721747 0 703239 148 35 113 113 0 186 1 amapchunkpl 152 75431 0 74447 50 11 39 39 0 158 1 amappl16 200 7246 0 6831 35 13 22 30 0 8 0 amappl15 192 610 0 607 1 0 1 1 0 8 0 amappl14 184 582 0 580 2 1 1 1 0 8 0 amappl13 176 53 0 52 1 0 1 1 0 8 0 amappl12 168 23 0 19 1 0 1 1 0 8 0 amappl11 160 909 0 894 1 0 1 1 0 8 0 amappl10 152 54 0 44 1 0 1 1 0 8 0 amappl9 144 1135 0 1131 1 0 1 1 0 8 0 amappl8 136 753 0 712 2 0 2 2 0 8 0 amappl7 128 417 0 404 1 0 1 1 0 8 0 amappl6 120 820 0 801 1 0 1 1 0 8 0 amappl5 112 2047 0 2024 1 0 1 1 0 8 0 amappl4 104 2102 0 2080 1 0 1 1 0 8 0 amappl3 96 179 0 163 1 0 1 1 0 8 0 amappl2 88 397 0 358 2 1 1 2 0 8 0 amappl1 80 48380 0 47871 13 2 11 13 0 8 0 amappl 88 30860 0 30649 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 13 0 1 1 0 1 1 0 8 0 uaddrrnd 24 2774 0 2738 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2774 0 2738 1 0 1 1 0 8 0 vmmpekpl 168 17039 0 17001 2 0 2 2 0 8 0 vmmpepl 168 245695 0 243743 125 30 95 100 0 357 6 vmsppl 368 2773 0 2738 4 0 4 4 0 8 0 rwobjpl 56 60581 0 54154 92 1 91 91 0 8 0 pdppl 4096 5556 0 5490 90 22 68 68 0 8 2 pvpl 32 1384967 0 1358613 265 50 215 215 0 265 2 pmappl 248 2773 0 2738 3 0 3 3 0 8 0 extentpl 40 57 0 38 1 0 1 1 0 8 0 phpool 112 888 0 32 25 0 25 25 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace pppacopen(86353,1,2000,ffff800027b0bce0) at pppacopen+0x1b5 sys/net/if_pppx.c:1020 spec_open(ffff800027b833a8) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd806d8de2b8,1,fffffd807f7d7720,ffff800027b0bce0) at VOP_OPEN+0x75 sys/kern/vfs_vops.c:138 vn_open(ffff800027b835f8,1,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff800027b0bce0,ffffff9c,20000780,0,0,ffff800027b837e0) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff800027b83850) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800027b83850) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x393ff938c00, count: -7 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 __mp_lock(ffffffff828f9a08) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828f9a08) at __mp_lock+0x122 sys/kern/kern_lock.c:147 selwakeup(fffffd806fa8add0) at selwakeup+0x16 sys/kern/sys_generic.c:884 pipe_write(fffffd806e591990,ffff8000211b2568,0) at pipe_write+0x89e pipeselwakeup sys/kern/sys_pipe.c:391 [inline] pipe_write(fffffd806e591990,ffff8000211b2568,0) at pipe_write+0x89e sys/kern/sys_pipe.c:678 dofilewritev(ffff8000ffff6550,1,ffff8000211b2568,0,ffff8000211b2660) at dofilewritev+0x19c sys/kern/sys_generic.c:380 sys_write(ffff8000ffff6550,ffff8000211b2600,ffff8000211b2660) at sys_write+0x83 sys/kern/sys_generic.c:300 syscall(ffff8000211b26d0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000211b26d0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffee2b0, count: 5 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 __mp_lock(ffffffff828f9a08) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828f9a08) at __mp_lock+0x122 sys/kern/kern_lock.c:147 selwakeup(fffffd806fa8add0) at selwakeup+0x16 sys/kern/sys_generic.c:884 pipe_write(fffffd806e591990,ffff8000211b2568,0) at pipe_write+0x89e pipeselwakeup sys/kern/sys_pipe.c:391 [inline] pipe_write(fffffd806e591990,ffff8000211b2568,0) at pipe_write+0x89e sys/kern/sys_pipe.c:678 dofilewritev(ffff8000ffff6550,1,ffff8000211b2568,0,ffff8000211b2660) at dofilewritev+0x19c sys/kern/sys_generic.c:380 sys_write(ffff8000ffff6550,ffff8000211b2600,ffff8000211b2660) at sys_write+0x83 sys/kern/sys_generic.c:300 syscall(ffff8000211b26d0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000211b26d0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffee2b0, count: -10