uvm_fault(0xffffffff82eaacd0, 0xfffffff97ce15c30, 0, 1) -> e kernel: page fault trap, code=0 Stopped at softclock_process_kclock_timeout+0x3e: movq timeout_kclock(%r15),%r13 TID PID UID PRFLAGS PFLAGS CPU COMMAND softclock_process_kclock_timeout(fffffd8062e92e78,0) at softclock_process_kclock_timeout+0x3e sys/kern/kern_timeout.c:676 softclock(0) at softclock+0x11a sys/kern/kern_timeout.c:754 softintr_dispatch(0) at softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90 Xsoftclock() at Xsoftclock+0x27 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffffffff82cb1ff0) at sched_idle+0x41e sys/kern/kern_sched.c:183 end trace frame: 0x0, count: 9 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(0xffffffff82eaacd0, 0xfffffff97ce15c30, 0, 1) -> e ddb{0}> trace softclock_process_kclock_timeout(fffffd8062e92e78,0) at softclock_process_kclock_timeout+0x3e sys/kern/kern_timeout.c:676 softclock(0) at softclock+0x11a sys/kern/kern_timeout.c:754 softintr_dispatch(0) at softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90 Xsoftclock() at Xsoftclock+0x27 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffffffff82cb1ff0) at sched_idle+0x41e sys/kern/kern_sched.c:183 end trace frame: 0x0, count: -6 ddb{0}> show registers rdi 0xfffffd8062e92e78 rsi 0 rbp 0xffff80002a101fa0 rbx 0 rdx 0 rcx 0xffff80002a0fc298 rax 0xffffffffdfdfdfdf r8 0 r9 0 r10 0x42a94d92f5cd0de1 r11 0x4c685d1389c6002d r12 0xdfdfdfdfdfdfdfdf r13 0xffffffff82e067e0 rdrand_tmo r14 0xfffffd8062e92e78 r15 0xfffffff9f9f9f9d0 rip 0xffffffff81e72c4e softclock_process_kclock_timeout+0x3e cs 0x8 rflags 0x10283 __ALIGN_SIZE+0xf283 rsp 0xffff80002a101f50 ss 0x10 softclock_process_kclock_timeout+0x3e: movq timeout_kclock(%r15),%r13 ddb{0}> show proc PROC (idle0) tid=419273 pid=84561 tcnt=1 stat=onproc flags process=14000 proc=40000200 runpri=0, usrpri=50, slppri=0, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0x5becc937bc78d6d4, list=0xffff80002a0fca90,0xffff80002a0fc000 process=0xffff8000ffffec60 user=0xffff80002a0fd000, vmspace=0xffffffff82e96728 estcpu=0, cpticks=36718, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 45717 454799 21513 0 3 0x82 piperd syz-executor.1 25411 233370 21513 0 3 0x82 wait syz-executor.7 17898 231880 21513 0 3 0x82 piperd syz-executor.0 64432 164785 21513 0 3 0x82 piperd syz-executor.6 53522 400683 21513 0 3 0x82 piperd syz-executor.2 22323 40428 21513 0 3 0x82 piperd syz-executor.5 29186 417151 21513 0 3 0x82 piperd syz-executor.4 39324 119331 1 0 3 0x100083 ttyin getty 84489 364817 21513 0 3 0x82 piperd syz-executor.3 31053 394458 0 0 3 0x14200 acct acct 37978 419060 0 0 3 0x14280 nfsidl nfsio 68207 93384 0 0 3 0x14280 nfsidl nfsio 26222 303562 0 0 3 0x14280 nfsidl nfsio 90226 56921 0 0 3 0x14280 nfsidl nfsio 1721 229906 0 0 3 0x14280 nfsidl nfsio 14534 8207 0 0 3 0x14280 nfsidl nfsio 33533 83398 0 0 3 0x14280 nfsidl nfsio 21257 290264 0 0 3 0x14280 nfsidl nfsio 6275 187484 0 0 3 0x14280 nfsidl nfsio 45095 317697 0 0 3 0x14280 nfsidl nfsio 89215 310948 0 0 3 0x14280 nfsidl nfsio 44275 16553 0 0 3 0x14280 nfsidl nfsio 84636 297512 0 0 3 0x14280 nfsidl nfsio 67011 138854 0 0 3 0x14280 nfsidl nfsio 84725 508800 0 0 3 0x14280 nfsidl nfsio 81303 218137 0 0 3 0x14280 nfsidl nfsio 94977 49063 0 0 3 0x14280 nfsidl nfsio 25685 459983 0 0 3 0x14280 nfsidl nfsio 82081 483908 0 0 3 0x14280 nfsidl nfsio 21643 387892 0 0 3 0x14280 nfsidl nfsio 85666 260410 0 0 3 0x14200 bored sosplice 21513 450485 91429 0 3 0x2000082 wait syz-fuzzer 21513 53044 91429 0 3 0x6000082 thrsleep syz-fuzzer 21513 521302 91429 0 3 0x6000082 wait syz-fuzzer 21513 24000 91429 0 3 0x6000082 thrsleep syz-fuzzer 21513 448028 91429 0 3 0x6000082 thrsleep syz-fuzzer 21513 266529 91429 0 3 0x6000082 wait syz-fuzzer 21513 290762 91429 0 3 0x6000082 wait syz-fuzzer 21513 134047 91429 0 3 0x6000082 thrsleep syz-fuzzer 21513 219654 91429 0 3 0x6000082 wait syz-fuzzer 21513 360756 91429 0 3 0x6000082 thrsleep syz-fuzzer 21513 193436 91429 0 3 0x6000082 thrsleep syz-fuzzer 21513 520891 91429 0 3 0x6000082 thrsleep syz-fuzzer 21513 423954 91429 0 3 0x6000082 wait syz-fuzzer 21513 385216 91429 0 3 0x6000082 wait syz-fuzzer 21513 174939 91429 0 3 0x6000082 kqread syz-fuzzer 21513 378270 91429 0 3 0x6000082 wait syz-fuzzer 91429 153927 3017 0 3 0x10008a sigsusp ksh 3017 142047 55129 0 3 0x9a kqread sshd 55129 202123 1 0 3 0x88 kqread sshd 97592 17646 25183 74 3 0x1100092 bpf pflogd 25183 50309 1 0 3 0x80 netio pflogd 49636 82525 61985 73 3 0x1100090 kqread syslogd 61985 23871 1 0 3 0x100082 netio syslogd 65779 388238 1 0 3 0x100080 kqread resolvd 6285 470979 34904 77 3 0x100092 kqread dhcpleased 52906 398699 34904 77 3 0x100092 kqread dhcpleased 34904 199441 1 0 3 0x80 kqread dhcpleased 89167 35000 0 0 3 0x14200 bored smr 21546 513473 0 0 3 0x14200 pgzero zerothread 8622 160928 0 0 3 0x14200 aiodoned aiodoned 54641 519915 0 0 3 0x14200 syncer update 18420 443823 0 0 3 0x14200 cleaner cleaner 68946 272106 0 0 3 0x14200 reaper reaper 16590 81538 0 0 3 0x14200 pgdaemon pagedaemon 23899 384575 0 0 3 0x14200 bored viomb 16146 460257 0 0 3 0x40014200 acpi0 acpi0 57837 159640 0 0 7 0x40014200 idle1 5194 352109 0 0 3 0x14200 bored softnet3 72456 486885 0 0 3 0x14200 bored softnet2 2863 430473 0 0 3 0x14200 bored softnet1 35099 189826 0 0 3 0x14200 bored softnet0 96799 444798 0 0 3 0x14200 bored systqmp 20191 339905 0 0 3 0x14200 bored systq 81648 517213 0 0 3 0x14200 tmoslp softclockmp 218 392956 0 0 3 0x40014200 tmoslp softclock *84561 419273 0 0 7 0x40014200 idle0 1 301159 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex /syzkaller/managers/multicore/kernel/sys/kern/kern_timeout.c:57 r = 0 (0xffffffff82d114b0) #0 witness_lock+0x447 #1 mtx_enter_try+0x104 #2 mtx_enter+0x4f sys/kern/kern_lock.c:266 #3 softclock+0x31 sys/kern/kern_timeout.c:745 #4 softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90 #5 Xsoftclock+0x27 #6 acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 #7 sched_idle+0x41e sys/kern/kern_sched.c:183 #8 proc_trampoline+0x10 Process 84561 (idle0) thread 0xffff80002a0fc298 (419273) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82eadd50) #0 witness_lock+0x447 #1 softintr_dispatch+0x52 sys/arch/amd64/amd64/softintr.c:88 #2 Xsoftclock+0x27 #3 acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 #4 sched_idle+0x41e sys/kern/kern_sched.c:183 #5 proc_trampoline+0x10 exclusive mutex /syzkaller/managers/multicore/kernel/sys/kern/kern_timeout.c:57 r = 0 (0xffffffff82d114b0) #0 witness_lock+0x447 #1 mtx_enter_try+0x104 #2 mtx_enter+0x4f sys/kern/kern_lock.c:266 #3 softclock+0x31 sys/kern/kern_timeout.c:745 #4 softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90 #5 Xsoftclock+0x27 #6 acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 #7 sched_idle+0x41e sys/kern/kern_sched.c:183 #8 proc_trampoline+0x10 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10240 6515K 7603K 166960K 48279 0 pcb 15 22K 24K 166960K 2172 0 rtable 247 15K 16K 166960K 3240 0 pf 42 11K 11K 166960K 440 0 ifaddr 49 17K 18K 166960K 444 0 ifgroup 75 3K 3K 166960K 714 0 sysctl 4 1K 2K 166960K 13 0 counters 72 37K 37K 166960K 448 0 ioctlops 0 0K 4K 166960K 2502 0 iov 0 0K 34K 166960K 2330 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1544 97K 97K 166960K 13477 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 262 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 2529 0 dirhash 12 2K 2K 166960K 93 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 11 37K 89K 166960K 22398 0 sigio 0 0K 0K 166960K 1154 0 proc 73 91K 128K 166960K 3473 0 subproc 104 6K 7K 166960K 943 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 1582 0 in_multi 99 7K 7K 166960K 1095 0 ether_multi 1 0K 0K 166960K 37 0 mrt 1 0K 0K 166960K 13 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 247 1102K 1102K 166960K 247 0 exec 0 0K 1K 166960K 4030 0 pfkey data 0 0K 1K 166960K 24 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 541 839K 846K 166960K 214602 0 UVM aobj 131 6K 6K 166960K 131 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 756 0 NDP 16 0K 2K 166960K 348 0 temp 74 6772K 137848K 166960K 211736 0 kqueue 12 18K 28K 166960K 1793 0 SYN cache 2 36K 44K 166960K 3 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 24 0 0 1 0 1 1 0 8 0 rtpcb 120 1087 0 1084 17 16 1 3 0 8 0 rtentry 112 1050 0 938 4 0 4 4 0 8 0 unpcb 144 16950 0 16935 169 168 1 11 0 8 0 syncache 320 245 0 245 37 37 0 1 0 8 0 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 596 0 596 31 31 0 2 0 8 0 tcpcb 808 6619 0 6606 186 182 4 16 0 8 0 arp 120 219 0 199 1 0 1 1 0 8 0 ipq 40 7 0 7 2 2 0 1 0 8 0 ipqe 40 21 0 21 2 2 0 1 0 8 0 inpcb 376 17957 0 17937 246 241 5 17 0 8 0 nd6 136 232 0 208 1 0 1 1 0 8 0 pkpcb 40 195 0 195 17 17 0 1 0 8 0 kcovpl 48 72 0 64 1 0 1 1 0 8 0 ppxss 1168 63 0 63 16 16 0 1 0 8 0 pffrag 232 178 0 177 4 3 1 1 0 482 0 pffrnode 88 178 0 177 4 3 1 1 0 8 0 pffrent 40 551 0 550 5 4 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 24 759 0 735 1 0 1 1 0 8 0 pfstkey 128 763 0 739 4 2 2 2 0 8 0 pfstate 376 763 0 739 21 17 4 8 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 3544 0 3070 66 36 30 31 0 8 0 art_table 32 3545 0 3070 4 0 4 4 0 8 0 art_node 16 1031 0 929 1 0 1 1 0 8 0 semapl 112 2523 0 2513 1 0 1 1 0 8 0 shmpl 112 128 0 0 4 0 4 4 0 8 0 dirhash 1024 71 0 54 3 0 3 3 0 8 0 dino2pl 256 30570 0 29044 96 0 96 96 0 8 0 ffsino 272 30570 0 29044 102 0 102 102 0 8 0 nchpl 144 60314 0 58654 63 0 63 63 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 200623 0 200623 7 6 1 2 0 8 1 percpumem 16 238 0 188 1 0 1 1 0 8 0 vcpupl 2048 107 0 0 14 0 14 14 0 8 0 vmpool 696 185 0 78 12 2 10 10 0 8 0 kstatmem 264 408 0 376 5 2 3 3 0 8 0 scxspl 216 170653 0 170653 48 47 1 8 1 8 1 plimitpl 152 1954 0 1938 1 0 1 1 0 8 0 sigapl 424 22620 0 22556 12 3 9 9 0 8 0 futexpl 64 179414 0 179414 1 0 1 1 0 8 1 knotepl 120 1089 0 0 12 1 11 11 0 8 0 kqueuepl 216 4826 0 4818 91 90 1 6 0 8 0 pipepl 320 4201 0 4173 115 112 3 13 0 8 0 fdescpl 496 22578 0 22554 13 8 5 5 0 8 0 filepl 152 131271 0 131030 198 183 15 25 0 8 2 lockfpl 104 6796 0 6794 8 7 1 2 0 8 0 lockfspl 48 2854 0 2852 1 0 1 1 0 8 0 sessionpl 144 92 0 75 1 0 1 1 0 8 0 pgrppl 48 595 0 578 1 0 1 1 0 8 0 ucredpl 104 17898 0 17884 1 0 1 1 0 8 0 zombiepl 144 22557 0 22556 3 2 1 1 0 8 0 processpl 1136 22620 0 22556 6 0 6 6 0 8 0 procpl 680 58908 0 58829 16 7 9 10 0 8 0 srpgc 96 105 0 105 29 29 0 1 0 8 0 sosppl 168 239 0 236 18 17 1 1 0 8 0 sockpl 584 36227 0 36193 349 344 5 24 0 8 0 mcl64k 65536 37 0 0 4 1 3 3 0 8 0 mcl16k 16384 18 0 0 3 0 3 3 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 18 0 0 2 0 2 2 0 8 0 mcl8k 8192 41 0 0 4 1 3 3 0 8 0 mcl4k 4096 56 0 0 5 2 3 4 0 8 0 mcl2k2 2112 11 0 0 1 0 1 1 0 8 0 mcl2k 2048 784 0 0 44 19 25 35 0 8 0 mtagpl 96 941 0 0 12 0 12 12 0 8 0 mbufpl 256 2098 0 0 83 0 83 83 0 8 0 bufpl 280 36896 0 30578 452 0 452 452 0 8 0 anonpl 24 2187451 0 2173581 184 70 114 123 0 186 0 amapchunkpl 152 672940 0 672154 68 28 40 44 0 158 0 amappl16 200 46173 0 45609 211 178 33 44 0 8 0 amappl15 192 26 0 26 3 3 0 1 0 8 0 amappl14 184 387 0 367 7 5 2 2 0 8 0 amappl13 176 27 0 26 1 0 1 1 0 8 0 amappl12 168 24338 0 24304 4 2 2 3 0 8 0 amappl11 160 54 0 40 1 0 1 1 0 8 0 amappl10 152 151 0 128 1 0 1 1 0 8 0 amappl9 144 332 0 330 1 0 1 1 0 8 0 amappl8 136 1121 0 935 10 3 7 7 0 8 0 amappl7 128 440 0 412 2 0 2 2 0 8 0 amappl6 120 1449 0 1428 1 0 1 1 0 8 0 amappl5 112 532 0 520 1 0 1 1 0 8 0 amappl4 104 1191 0 1160 2 1 1 2 0 8 0 amappl3 96 132580 0 132513 8 5 3 4 0 8 0 amappl2 88 23987 0 23903 4 1 3 3 0 8 0 amappl1 80 92781 0 92240 25 12 13 23 0 8 0 amappl 88 212970 0 212698 8 0 8 8 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 72 130 0 0 3 0 3 3 0 8 0 uaddrrnd 24 22763 0 22632 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 22763 0 22632 1 0 1 1 0 8 0 vmmpekpl 168 164434 0 164353 5 0 5 5 0 8 0 vmmpepl 168 1345196 0 1342691 574 423 151 174 0 357 8 vmsppl 448 22762 0 22632 21 5 16 16 0 8 0 rwobjpl 56 318770 0 310880 126 10 116 116 0 8 0 pdppl 4096 45533 0 45371 1096 922 174 177 0 8 12 pvpl 32 45616 0 0 368 0 368 368 0 265 0 pmappl 248 22762 0 22632 9 0 9 9 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 2119 0 1543 17 0 17 17 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace softclock_process_kclock_timeout(fffffd8062e92e78,0) at softclock_process_kclock_timeout+0x3e sys/kern/kern_timeout.c:676 softclock(0) at softclock+0x11a sys/kern/kern_timeout.c:754 softintr_dispatch(0) at softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90 Xsoftclock() at Xsoftclock+0x27 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffffffff82cb1ff0) at sched_idle+0x41e sys/kern/kern_sched.c:183 end trace frame: 0x0, count: -6 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffff800029cebff0) at x86_ipi_db+0x1e 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+0x27 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800029cebff0) at sched_idle+0x41e sys/kern/kern_sched.c:183 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff800029cebff0) at x86_ipi_db+0x1e 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+0x27 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800029cebff0) at sched_idle+0x41e sys/kern/kern_sched.c:183 end trace frame: 0x0, count: -5