uvm_fault(0xfffffd8065e155d0, 0x668, 0, 2) -> e kernel: page fault trap, code=0 Stopped at pppacopen+0x1b5: movq %r13,0x668 TID PID UID PRFLAGS PFLAGS CPU COMMAND *241199 97541 0 0 0x4000000 0K syz-executor.0 488373 62143 0 0x14000 0x200 1 reaper pppacopen(4086331,1,2000,ffff80002125aa88) at pppacopen+0x1b5 sys/net/if_pppx.c:1020 spec_open(ffff8000246bc7a8) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd8076026780,1,fffffd807f7d78a0,ffff80002125aa88) at VOP_OPEN+0x75 sys/kern/vfs_vops.c:138 vn_open(ffff8000246bc9f8,1,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff80002125aa88,ffffff9c,20000100,0,0,ffff8000246bcbe0) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff8000246bcc50) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000246bcc50) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa2066fafd10, 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(0xfffffd8065e155d0, 0x668, 0, 2) -> e ddb{0}> trace pppacopen(4086331,1,2000,ffff80002125aa88) at pppacopen+0x1b5 sys/net/if_pppx.c:1020 spec_open(ffff8000246bc7a8) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd8076026780,1,fffffd807f7d78a0,ffff80002125aa88) at VOP_OPEN+0x75 sys/kern/vfs_vops.c:138 vn_open(ffff8000246bc9f8,1,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff80002125aa88,ffffff9c,20000100,0,0,ffff8000246bcbe0) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff8000246bcc50) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000246bcc50) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa2066fafd10, count: -7 ddb{0}> show registers rdi 0xffff800021293000 rsi 0x909 rbp 0xffff8000246bc720 rbx 0 rdx 0xffff800021293000 rcx 0x908 rax 0xffffffff81c79ee5 pppacopen+0x1b5 r8 0x770 r9 0xfffffd807f7d78a0 r10 0x3e3c26793ad02381 r11 0xb1b87d156b1d9eee r12 0xfffffd8076026780 r13 0 r14 0x4086331 __kernel_phys_end+0x1486331 r15 0xffff8000246bc7a8 rip 0xffffffff81c79ee5 pppacopen+0x1b5 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000246bc6d0 ss 0x10 pppacopen+0x1b5: movq %r13,0x668 ddb{0}> show proc PROC (syz-executor.0) pid=241199 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=69, nice=20 forw=0xffffffffffffffff, list=0xffff80002125afc8,0xffffffff8293ceb0 process=0xffff8000ffffb1e8 user=0xffff8000246b7000, vmspace=0xfffffd8065e155d0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 97541 62706 16429 0 2 0 syz-executor.0 *97541 241199 16429 0 7 0x4000000 syz-executor.0 72012 346741 42835 0 3 0x82 nanoslp syz-executor.3 17952 58004 42835 0 2 0x482 syz-executor.2 51035 275555 42835 0 2 0x2 syz-executor.1 16429 36438 42835 0 3 0x82 nanoslp syz-executor.0 42835 195900 24107 0 3 0x82 thrsleep syz-fuzzer 42835 323765 24107 0 3 0x4000082 nanoslp syz-fuzzer 42835 154351 24107 0 3 0x4000082 thrsleep syz-fuzzer 42835 466347 24107 0 3 0x4000082 kqread syz-fuzzer 42835 263926 24107 0 3 0x4000082 thrsleep syz-fuzzer 42835 457263 24107 0 3 0x4000082 thrsleep syz-fuzzer 42835 257328 24107 0 3 0x4000082 thrsleep syz-fuzzer 42835 451849 24107 0 3 0x4000082 nanoslp syz-fuzzer 24107 292175 44426 0 3 0x10008a sigsusp ksh 44426 212268 14557 0 3 0x9a poll sshd 19614 364874 1 0 3 0x100083 ttyin getty 14557 287167 1 0 3 0x88 poll sshd 67443 52850 4049 74 3 0x100092 bpf pflogd 4049 43675 1 0 3 0x80 netio pflogd 32471 372211 71746 73 3 0x100090 kqread syslogd 71746 261194 1 0 3 0x100082 netio syslogd 92291 310297 1 0 3 0x100080 kqread resolvd 90393 151143 49366 77 3 0x100092 kqread dhcpleased 36532 196742 49366 77 3 0x100092 kqread dhcpleased 49366 191817 1 0 3 0x80 kqread dhcpleased 67235 7038 0 0 3 0x14200 bored smr 1389 140275 0 0 2 0x14200 zerothread 89544 138850 0 0 3 0x14200 aiodoned aiodoned 39267 281441 0 0 3 0x14200 syncer update 85862 193379 0 0 3 0x14200 cleaner cleaner 62143 488373 0 0 7 0x14200 reaper 93003 142239 0 0 3 0x14200 pgdaemon pagedaemon 66823 289299 0 0 3 0x14200 bored viomb 81328 20769 0 0 3 0x40014200 acpi0 acpi0 55088 137690 0 0 3 0x40014200 idle1 86456 468545 0 0 3 0x14200 bored softnet 95184 40684 0 0 3 0x14200 bored systqmp 62703 429307 0 0 3 0x14200 bored systq 38705 112993 0 0 3 0x40014200 bored softclock 60842 485279 0 0 3 0x40014200 idle0 1 259122 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 1: exclusive mutex amappl1 r = 0 (0xffffffff829f3470) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pool_put+0x8a sys/kern/subr_pool.c:799 #4 amap_wipeout+0x221 sys/uvm/uvm_amap.c:532 #5 uvm_unmap_detach+0x7d sys/uvm/uvm_map.c:1599 #6 uvm_map_teardown+0x262 sys/uvm/uvm_map.c:2789 #7 uvmspace_free+0xa6 sys/uvm/uvm_map.c:3685 #8 reaper+0x18b sys/kern/kern_exit.c:462 #9 proc_trampoline+0x1c Process 97541 (syz-executor.0) thread 0xffff80002125aa88 (241199) 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 51035 (syz-executor.1) thread 0xffff8000212337a0 (275555) exclusive rrwlock inode r = 0 (0xfffffd80680c3810) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 ufs_ihashins+0x42 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1347 #6 ffs_inode_alloc+0x1be sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1162 #8 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:404 #9 domkdirat+0x121 sys/kern/vfs_syscalls.c:3100 #10 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #10 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806a6164d8) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:579 #5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:413 #6 namei+0x36a sys/kern/vfs_lookup.c:245 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3085 #8 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10182 6660K 6722K 78643K 11482 0 pcb 13 8K 8K 78643K 26 0 rtable 139 12K 13K 78643K 252 0 ifaddr 60 13K 13K 78643K 82 0 counters 48 34K 34K 78643K 58 0 ioctlops 0 0K 4K 78643K 1492 0 iov 0 0K 12K 78643K 11 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1236 78K 78K 78643K 1312 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 3 0 VM map 2 1K 1K 78643K 2 0 sem 7 0K 0K 78643K 7 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 7 21K 49K 78643K 295 0 sigio 0 0K 0K 78643K 1 0 proc 70 87K 124K 78643K 396 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 32 0 in_multi 58 3K 4K 78643K 87 0 ether_multi 1 0K 0K 78643K 7 0 mrt 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 43 201K 201K 78643K 43 0 exec 0 0K 2K 78643K 456 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 226 45K 46K 78643K 4936 0 UVM aobj 4 2K 2K 78643K 6 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 8 0 NDP 8 0K 1K 78643K 21 0 temp 65 4193K 4257K 78643K 4344 0 kqueue 10 14K 16K 78643K 25 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 38 0 35 1 0 1 1 0 8 0 rtentry 112 69 0 10 2 0 2 2 0 8 0 unpcb 136 63 0 48 1 0 1 1 0 8 0 syncache 296 9 0 9 2 2 0 1 0 8 0 tcpqe 32 488 0 488 2 2 0 2 0 8 0 tcpcb 736 48 0 41 2 1 1 2 0 8 0 arp 120 11 0 0 1 0 1 1 0 8 0 inpcb 304 140 0 132 2 0 2 2 0 8 1 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 pftag 88 2 0 2 1 0 1 1 0 8 1 pfstitem 24 17 0 1 1 0 1 1 0 8 0 pfstkey 112 17 0 1 1 0 1 1 0 8 0 pfstate 320 17 0 1 2 0 2 2 0 8 0 pfrule 1360 25 0 20 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 309 0 41 18 0 18 18 0 8 1 art_table 32 310 0 41 3 0 3 3 0 8 0 art_node 16 68 0 17 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 1 1 1 0 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 5 0 0 1 0 1 1 0 8 0 shmpl 112 3 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1739 0 324 89 0 89 89 0 8 0 ffsino 272 1739 0 324 95 0 95 95 0 8 0 nchpl 144 2232 0 607 61 0 61 61 0 8 0 uvmvnodes 80 1850 0 0 38 0 38 38 0 8 0 vnodes 224 1850 0 0 109 0 109 109 0 8 0 namei 1024 6205 0 6204 1 0 1 1 0 8 0 percpumem 16 41 0 5 1 0 1 1 0 8 0 scsiplug 72 1 0 1 1 1 0 1 0 8 0 scxspl 216 6652 0 6652 9 2 7 8 0 8 7 plimitpl 152 28 0 17 1 0 1 1 0 8 0 sigapl 424 533 0 499 5 0 5 5 0 8 1 futexpl 64 1251 0 1251 1 0 1 1 0 8 1 knotepl 112 76 0 0 3 0 3 3 0 8 0 kqueuepl 216 25 0 19 1 0 1 1 0 8 0 pipepl 336 95 0 79 2 0 2 2 0 8 0 fdescpl 496 519 0 499 4 1 3 4 0 8 0 filepl 152 1904 0 1752 7 0 7 7 0 8 1 lockfpl 104 28 0 26 1 0 1 1 0 8 0 lockfspl 48 15 0 13 1 0 1 1 0 8 0 sessionpl 144 20 0 7 1 0 1 1 0 8 0 pgrppl 48 22 0 9 1 0 1 1 0 8 0 ucredpl 96 155 0 143 1 0 1 1 0 8 0 zombiepl 144 499 0 497 1 0 1 1 0 8 0 processpl 1064 533 0 497 3 0 3 3 0 8 0 procpl 672 795 0 751 5 0 5 5 0 8 0 sockpl 480 241 0 216 4 0 4 4 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 3 0 0 1 0 1 1 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 282 0 0 35 0 35 35 0 8 0 mtagpl 96 31 0 0 1 0 1 1 0 8 0 mbufpl 256 342 0 0 21 0 21 21 0 8 0 bufpl 288 3815 0 141 263 0 263 263 0 8 0 anonpl 24 115994 0 101417 109 5 104 104 0 186 11 amapchunkpl 152 11506 0 10876 30 1 29 30 0 158 0 amappl16 200 1283 0 851 31 2 29 29 0 8 6 amappl14 184 3 0 2 1 0 1 1 0 8 0 amappl13 176 42 0 40 1 0 1 1 0 8 0 amappl12 168 81 0 75 1 0 1 1 0 8 0 amappl11 160 50 0 36 1 0 1 1 0 8 0 amappl10 152 45 0 38 1 0 1 1 0 8 0 amappl9 144 591 0 585 1 0 1 1 0 8 0 amappl8 136 427 0 391 2 0 2 2 0 8 0 amappl7 128 142 0 132 1 0 1 1 0 8 0 amappl6 120 271 0 257 1 0 1 1 0 8 0 amappl5 112 388 0 370 1 0 1 1 0 8 0 amappl4 104 599 0 578 1 0 1 1 0 8 0 amappl3 96 235 0 215 1 0 1 1 0 8 0 amappl2 88 368 0 326 2 1 1 2 0 8 0 amappl1 80 12173 0 11705 13 1 12 13 0 8 0 amappl 88 4589 0 4421 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 5 0 2 1 0 1 1 0 8 0 uaddrrnd 24 519 0 499 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 519 0 499 1 0 1 1 0 8 0 vmmpekpl 168 7547 0 7515 2 0 2 2 0 8 0 vmmpepl 168 50538 0 48745 102 9 93 102 0 357 8 vmsppl 368 518 0 498 3 0 3 3 0 8 0 rwobjpl 56 15184 0 12094 45 0 45 45 0 8 0 pdppl 4096 1046 0 996 74 20 54 62 0 8 4 pvpl 32 286136 0 268153 174 3 171 171 0 265 18 pmappl 248 518 0 498 2 0 2 2 0 8 0 extentpl 40 57 0 38 1 0 1 1 0 8 0 phpool 112 614 0 24 17 0 17 17 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace pppacopen(4086331,1,2000,ffff80002125aa88) at pppacopen+0x1b5 sys/net/if_pppx.c:1020 spec_open(ffff8000246bc7a8) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd8076026780,1,fffffd807f7d78a0,ffff80002125aa88) at VOP_OPEN+0x75 sys/kern/vfs_vops.c:138 vn_open(ffff8000246bc9f8,1,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff80002125aa88,ffffff9c,20000100,0,0,ffff8000246bcbe0) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff8000246bcc50) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000246bcc50) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa2066fafd10, 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x34 sys/dev/kcov.c:154 __mp_lock(ffffffff828f9a08) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828f9a08) at __mp_lock+0x133 sys/kern/kern_lock.c:147 uvm_unmap_detach(ffff8000211856a0,1) at uvm_unmap_detach+0x113 sys/uvm/uvm_map.c:1615 uvm_map_teardown(fffffd8065e15180) at uvm_map_teardown+0x262 sys/uvm/uvm_map.c:2789 uvmspace_free(fffffd8065e15180) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3685 reaper(ffff8000211497a0) at reaper+0x18b sys/kern/kern_exit.c:462 end trace frame: 0x0, count: 6 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x34 sys/dev/kcov.c:154 __mp_lock(ffffffff828f9a08) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828f9a08) at __mp_lock+0x133 sys/kern/kern_lock.c:147 uvm_unmap_detach(ffff8000211856a0,1) at uvm_unmap_detach+0x113 sys/uvm/uvm_map.c:1615 uvm_map_teardown(fffffd8065e15180) at uvm_map_teardown+0x262 sys/uvm/uvm_map.c:2789 uvmspace_free(fffffd8065e15180) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3685 reaper(ffff8000211497a0) at reaper+0x18b sys/kern/kern_exit.c:462 end trace frame: 0x0, count: -9