login: uvm_fault(0xffff800001c4dd70, 0x8, 0, 1) -> e kernel: page fault trap, code=0 Stopped at knote_processfork+0x287: movq 0x8(%r15),%r14 TID PID UID PRFLAGS PFLAGS CPU COMMAND 41950 87459 0 0 0x4000000 1 syz-executor * 67561 78534 0 0 0x4000000 0K syz-executor knote_processfork(ffffffff85d370e0,12ced) at knote_processfork+0x287 sys/kern/kern_event.c:2246 fork1(ffffffff85d36d80,f0,ffffffff830a12e0,0,0,ffff800039b40580) at fork1+0x1225 sys/kern/kern_fork.c:511 kthread_create(ffffffff830a12e0,0,0,ffffffff84b844a0) at kthread_create+0xa8 sys/kern/kern_kthread.c:61 nfs_getset_niothreads(1) at nfs_getset_niothreads+0xe7 sys/nfs/nfs_syscalls.c:702 nfs_sysctl(ffff800039b40788,1,0,ffff800039b40760,200000000200,0,ffff800039b409d0) at nfs_sysctl+0x102 sys/nfs/nfs_vfsops.c:894 sys_sysctl(ffff800045ff5a10,ffff800039b409d0,ffff800039b40940) at sys_sysctl+0x54f sys/kern/kern_sysctl.c:309 syscall(ffff800039b409d0) at syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800039b409d0) at syscall+0x1089 sys/arch/amd64/amd64/trap.c:791 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74ee9a13270, count: 7 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(0xffff800001c4dd70, 0x8, 0, 1) -> e ddb{0}> show kasan kasan: no report recorded this boot ddb{0}> trace knote_processfork(ffffffff85d370e0,12ced) at knote_processfork+0x287 sys/kern/kern_event.c:2246 fork1(ffffffff85d36d80,f0,ffffffff830a12e0,0,0,ffff800039b40580) at fork1+0x1225 sys/kern/kern_fork.c:511 kthread_create(ffffffff830a12e0,0,0,ffffffff84b844a0) at kthread_create+0xa8 sys/kern/kern_kthread.c:61 nfs_getset_niothreads(1) at nfs_getset_niothreads+0xe7 sys/nfs/nfs_syscalls.c:702 nfs_sysctl(ffff800039b40788,1,0,ffff800039b40760,200000000200,0,ffff800039b409d0) at nfs_sysctl+0x102 sys/nfs/nfs_vfsops.c:894 sys_sysctl(ffff800045ff5a10,ffff800039b409d0,ffff800039b40940) at sys_sysctl+0x54f sys/kern/kern_sysctl.c:309 syscall(ffff800039b409d0) at syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800039b409d0) at syscall+0x1089 sys/arch/amd64/amd64/trap.c:791 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74ee9a13270, count: -8 ddb{0}> show registers rdi 0x8 rsi 0x1 rbp 0xffff800039b40450 rbx 0xffff800001b617ba rdx 0 rcx 0xffffffff84f15ff0 cpu_info_full_primary+0x1ff0 rax 0x1 r8 0x8 r9 0x1 r10 0 r11 0xffffffff8301f780 filt_proc r12 0xffff800039b40300 r13 0xffff800039b40300 r14 0xffffffff85d37220 process0+0x140 r15 0 rip 0xffffffff8302db97 knote_processfork+0x287 cs 0x8 rflags 0x10286 __ALIGN_SIZE+0xf286 rsp 0xffff800039b402a0 ss 0x10 knote_processfork+0x287: movq 0x8(%r15),%r14 ddb{0}> show proc PROC (syz-executor) tid=67561 pid=78534 tcnt=4 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800045ff5778,0xffff800029913248 process=0xffff800045ff8018 user=0xffff800039b35000, vmspace=0xffff800001c4dd70 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND 77037 8593 0 0 2 0x14000 0x200 swapper 65547 469268 82249 0 3 0x2 0 clonelk ifconfig 87459 60021 19186 0 2 0 0 syz-executor 87459 380393 19186 0 3 0 0x4000080 fsleep syz-executor 87459 181658 19186 0 3 0 0x4000080 fsleep syz-executor 87459 476667 19186 0 3 0 0x4000080 fsleep syz-executor 87459 41950 19186 0 7 0 0x4000000 syz-executor 37809 245049 73713 0 2 0x10 0 syz-executor 37809 421407 73713 0 2 0x10 0x4000000 syz-executor 37809 179843 73713 0 3 0x10 0x4000000 inode syz-executor 82249 154061 99794 0 3 0x100002 0x88 sigsusp sh 92262 322996 67354 0 2 0 0 syz-executor 92262 105922 67354 0 3 0 0x4000080 fsleep syz-executor 78534 499354 11111 0 2 0 0 syz-executor 78534 263162 11111 0 2 0 0x4000080 syz-executor 78534 276722 11111 0 3 0 0x4000080 fsleep syz-executor *78534 67561 11111 0 7 0 0x4000000 syz-executor 44479 476615 5741 0 3 0x10 0x80 nanoslp syz-executor 44479 221215 5741 0 3 0x10 0x4000080 kqread syz-executor 44479 99985 5741 0 3 0x10 0x4000080 fsleep syz-executor 99794 334113 46711 0 3 0x2 0x80 wait syz-executor 73713 144857 46711 0 3 0x2 0x80 nanoslp syz-executor 5741 393868 46711 0 3 0x2 0x80 nanoslp syz-executor 65873 218524 46711 0 3 0x2 0x80 piperd syz-executor 19186 391473 46711 0 3 0x2 0x80 nanoslp syz-executor 24968 214215 1 0 3 0x100003 0x80 ttyin getty 11111 189351 46711 0 3 0x2 0x80 nanoslp syz-executor 67354 34062 46711 0 3 0x2 0x80 nanoslp syz-executor 46711 16976 1 0 3 0x2 0x80 wait syz-executor 27765 505546 1 0 3 0x10000002 0x88 kqread sshd 62259 80280 19187 74 3 0x1100012 0x80 bpf pflogd 19187 470492 1 0 3 0 0x80 sbwait pflogd 95847 59793 20720 73 3 0x1100010 0x80 kqread syslogd 20720 105097 1 0 3 0x100002 0x80 sbwait syslogd 68152 512307 1 0 3 0x100000 0x80 kqread resolvd 28906 424064 60538 77 3 0x100012 0x80 kqread dhcpleased 26017 410468 60538 77 3 0x100012 0x80 kqread dhcpleased 60538 261666 1 0 3 0 0x80 kqread dhcpleased 57435 226479 0 0 3 0x14000 0x200 bored smr 83868 356749 0 0 2 0x14000 0x200 zerothread 14440 422901 0 0 3 0x14000 0x200 aiodoned aiodoned 17907 199217 0 0 3 0x14000 0x200 syncer update 43729 37596 0 0 3 0x14000 0x200 cleaner cleaner 19427 271404 0 0 3 0x14000 0x200 reaper reaper 29089 514775 0 0 3 0x14000 0x200 pgdaemon pagedaemon 48814 514701 0 0 3 0x14000 0x200 bored viomb 6427 512491 0 0 3 0x14000 0x40000200 acpi0 acpi0 97397 291506 0 0 3 0x14000 0x40000200 idle1 20118 162782 0 0 3 0x14000 0x200 bored softnet1 97596 76748 0 0 3 0x14000 0x200 bored softnet0 39446 177625 0 0 3 0x14000 0x200 bored systqmp 17387 440539 0 0 3 0x14000 0x200 bored systq 50506 330794 0 0 3 0x14000 0x200 tmoslp softclockmp 50667 193234 0 0 3 0x14000 0x40000200 tmoslp softclock 56629 64937 0 0 3 0x14000 0x40000200 idle0 1 463240 0 0 3 0x2 0x80 wait init 0 0 -1 0 3 0x10000 0x200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &pr->ps_mtx r = 0 (0xffffffff85d371f8) #0 witness_lock+0x632 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x632 sys/kern/subr_witness.c:1160 #1 mtx_enter+0x683 sys/kern/kern_lock.c:487 #2 knote_processfork+0x666 sys/kern/kern_event.c:-1 #3 fork1+0x1225 sys/kern/kern_fork.c:511 #4 kthread_create+0xa8 sys/kern/kern_kthread.c:61 #5 nfs_getset_niothreads+0xe7 sys/nfs/nfs_syscalls.c:702 #6 nfs_sysctl+0x102 sys/nfs/nfs_vfsops.c:894 #7 sys_sysctl+0x54f sys/kern/kern_sysctl.c:309 #8 syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0x1089 sys/arch/amd64/amd64/trap.c:791 #9 Xsyscall+0x128 Process 37809 (syz-executor) thread 0xffff800045ffd240 (421407) exclusive rrwlock inode r = 0 (0xffff800001715110) #0 witness_lock+0x632 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x632 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x53e sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xf0 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0x17e sys/kern/vfs_vops.c:527 #4 vn_lock+0xca sys/kern/vfs_vnops.c:576 #5 vn_write+0x200 sys/kern/vfs_vnops.c:410 #6 dofilewritev+0x3ef sys/kern/sys_generic.c:384 #7 sys_writev+0x168 sys/kern/sys_generic.c:327 #8 syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0x1089 sys/arch/amd64/amd64/trap.c:791 #9 Xsyscall+0x128 Process 37809 (syz-executor) thread 0xffff800029894f98 (179843) exclusive rrwlock inode r = 0 (0xffff800001715b78) #0 witness_lock+0x632 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x632 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x53e sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xf0 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0x17e sys/kern/vfs_vops.c:527 #4 vn_lock+0xca sys/kern/vfs_vnops.c:576 #5 vfs_lookup+0x1f7 sys/kern/vfs_lookup.c:431 #6 namei+0xe19 sys/kern/vfs_lookup.c:250 #7 sys_truncate+0xd4 sys/kern/vfs_syscalls.c:2831 #8 syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0x1089 sys/arch/amd64/amd64/trap.c:791 #9 Xsyscall+0x128 Process 78534 (syz-executor) thread 0xffff800045ff5a10 (67561) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff85cda380) #0 witness_lock+0x632 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x632 sys/kern/subr_witness.c:1160 #1 sysctl_vslock+0x72 sys/kern/kern_sysctl.c:197 #2 sys_sysctl+0x460 sys/kern/kern_sysctl.c:304 #3 syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline] #3 syscall+0x1089 sys/arch/amd64/amd64/trap.c:791 #4 Xsyscall+0x128 exclusive rwlock sysctllk r = 0 (0xffffffff85073238) #0 witness_lock+0x632 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x632 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x53e sys/kern/kern_rwlock.c:320 #2 sysctl_vslock+0x37 sys/kern/kern_sysctl.c:192 #3 sys_sysctl+0x460 sys/kern/kern_sysctl.c:304 #4 syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline] #4 syscall+0x1089 sys/arch/amd64/amd64/trap.c:791 #5 Xsyscall+0x128 exclusive mutex &pr->ps_mtx r = 0 (0xffffffff85d371f8) #0 witness_lock+0x632 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x632 sys/kern/subr_witness.c:1160 #1 mtx_enter+0x683 sys/kern/kern_lock.c:487 #2 knote_processfork+0x666 sys/kern/kern_event.c:-1 #3 fork1+0x1225 sys/kern/kern_fork.c:511 #4 kthread_create+0xa8 sys/kern/kern_kthread.c:61 #5 nfs_getset_niothreads+0xe7 sys/nfs/nfs_syscalls.c:702 #6 nfs_sysctl+0x102 sys/nfs/nfs_vfsops.c:894 #7 sys_sysctl+0x54f sys/kern/kern_sysctl.c:309 #8 syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0x1089 sys/arch/amd64/amd64/trap.c:791 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11060 12252K 12391K 166960K 12275 0 pcb 17 24K 24K 166960K 32 0 rtable 203 19K 20K 166960K 800 0 pf 35 22K 22K 166960K 77 0 ifaddr 37 10K 12K 166960K 104 0 ifgroup 55 2K 2K 166960K 115 0 sysctl 1 1K 13K 166960K 5 0 counters 70 42K 43K 166960K 100 0 ioctlops 0 0K 4K 166960K 1516 0 iov 0 0K 1K 166960K 101 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1330 86K 86K 166960K 1581 0 UFS quota 1 36K 36K 166960K 1 0 UFS mount 5 44K 44K 166960K 5 0 shm 2 2K 6K 166960K 4 0 VM map 2 1K 1K 166960K 2 0 sem 8 0K 0K 166960K 8 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 97K 166960K 432 0 proc 77 144K 177K 166960K 960 0 subproc 72 9K 9K 166960K 207 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 20K 20K 166960K 1 0 ip_moptions 0 0K 0K 166960K 4 0 in_multi 77 5K 7K 166960K 253 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 7 0 ISOFS mount 1 36K 36K 166960K 1 0 MSDOSFS mount 1 20K 20K 166960K 1 0 ttys 43 303K 303K 166960K 43 0 exec 0 0K 2K 166960K 575 0 fusefs mount 1 36K 36K 166960K 1 0 tdb 3 1K 1K 166960K 3 0 VM swap 14 124K 124K 166960K 15 0 UVM amap 214 233K 279K 166960K 5084 0 UVM aobj 4 4K 4K 166960K 5 0 pinsyscall 1061 1766K 1772K 166960K 1963 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 1 0 NDP 14 0K 2K 166960K 71 0 temp 35 9162K 9190K 166960K 5971 0 kqueue 14 38K 44K 166960K 47 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 28 0 0 1 0 1 1 0 8 0 rtpcb 120 61 0 58 1 0 1 1 0 8 0 rtentry 176 272 0 182 5 0 5 5 0 8 0 unpcb 144 160 0 143 3 0 3 3 0 8 2 syncache 336 4 0 4 2 2 0 1 0 8 0 tcpcb 736 51 0 48 1 0 1 1 0 8 0 arp 136 47 0 33 1 0 1 1 0 8 0 inpcb 328 309 0 299 4 0 4 4 0 8 3 nd6 152 70 0 50 1 0 1 1 0 8 0 kcovpl 48 23 0 15 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 1429 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1429 0 714 21 0 21 21 0 8 0 pfstitem 24 38 0 0 1 0 1 1 0 8 0 pfstkey 128 38 0 0 2 0 2 2 0 8 0 pfstate 448 36 0 0 4 0 4 4 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1084 0 712 31 4 27 29 0 8 2 art_table 40 1085 0 712 5 0 5 5 0 8 0 art_node 32 272 0 190 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 2 1 0 1 1 0 8 1 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 72 6 0 0 1 0 1 1 0 8 0 shmpl 112 2 0 1 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1732 0 223 95 0 95 95 0 8 0 ffsino 296 1732 0 223 117 0 117 117 0 8 0 nchpl 144 2049 0 280 66 0 66 66 0 8 0 vnodes 216 2013 0 0 112 0 112 112 0 8 0 namei 1024 9620 0 9619 2 1 1 2 0 8 0 percpumem 16 66 0 15 1 0 1 1 0 8 0 kstatmem 264 59 0 30 3 0 3 3 0 8 0 scxspl 216 7748 0 7748 9 1 8 8 1 8 8 plimitpl 152 82 0 67 1 0 1 1 0 8 0 sigapl 424 721 0 675 7 0 7 7 0 8 1 knotepl 120 63 0 0 2 0 2 2 0 8 0 kqueuepl 224 121 0 46 5 0 5 5 0 8 0 pipepl 344 187 0 160 3 0 3 3 0 8 0 fdescpl 528 704 0 676 3 0 3 3 0 8 0 filepl 160 3027 0 2715 14 0 14 14 0 8 0 lockfpl 104 33 0 30 1 0 1 1 0 8 0 lockfspl 48 15 0 12 1 0 1 1 0 8 0 sessionpl 144 43 0 33 1 0 1 1 0 8 0 pgrppl 48 66 0 48 1 0 1 1 0 8 0 ucredpl 104 189 0 174 1 0 1 1 0 8 0 zombiepl 144 677 0 675 1 0 1 1 0 8 0 processpl 1232 721 0 675 5 0 5 5 0 8 1 procpl 664 902 0 844 6 0 6 6 0 8 1 sockpl 752 531 0 501 7 0 7 7 0 8 4 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl16k 16384 4 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 123 0 0 16 0 16 16 0 8 0 mcl2k 2048 19 0 0 3 0 3 3 0 8 0 mextrefs 64 17 0 0 1 0 1 1 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 178 0 0 12 0 12 12 0 8 0 bufpl 272 2508 0 106 161 0 161 161 0 8 0 anonpl 32 5000 0 0 41 0 41 41 0 222 0 amapchunkpl 152 14002 0 13566 23 0 23 23 0 158 5 amappl16 200 2141 0 2109 5 3 2 5 0 8 0 amappl15 192 38 0 38 1 1 0 1 0 8 0 amappl14 184 602 0 601 1 0 1 1 0 8 0 amappl13 176 154 0 144 1 0 1 1 0 8 0 amappl12 168 1015 0 989 2 0 2 2 0 8 0 amappl11 160 9 0 9 3 2 1 1 0 8 1 amappl10 152 68 0 54 1 0 1 1 0 8 0 amappl9 144 274 0 273 1 0 1 1 0 8 0 amappl8 136 155 0 153 1 0 1 1 0 8 0 amappl7 128 179 0 167 1 0 1 1 0 8 0 amappl6 120 295 0 292 1 0 1 1 0 8 0 amappl5 112 133 0 125 1 0 1 1 0 8 0 amappl4 104 350 0 331 1 0 1 1 0 8 0 amappl3 96 2519 0 2430 3 0 3 3 0 8 0 amappl2 88 781 0 714 2 0 2 2 0 8 0 amappl1 80 12986 0 12542 17 1 16 16 0 8 5 amappl 88 4096 0 3949 4 0 4 4 0 92 0 uvmvnodes 80 100 0 0 3 0 3 3 0 8 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 4 0 1 1 0 1 1 0 8 0 uaddrrnd 24 704 0 676 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 704 0 676 1 0 1 1 0 8 0 vmmpekpl 168 7996 0 7963 3 0 3 3 0 8 0 vmmpepl 168 55371 0 53795 89 0 89 89 0 357 18 vmsppl 488 703 0 676 5 0 5 5 0 8 0 rwobjpl 80 19274 0 18353 25 0 25 25 0 8 3 pdppl 4096 1416 0 1352 114 48 66 88 0 8 2 pvpl 32 9982 0 0 82 1 81 82 0 265 0 pmappl 256 703 0 676 3 0 3 3 0 8 0 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 120 456 0 58 13 0 13 13 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}>