login: uvm_fault(0xffffffff82d8afc8, 0xffffffeaa5d05520, 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(fffffd805b8edf00,0) 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(ffffffff82c0cff0) at sched_idle+0x41e sys/kern/kern_sched.c:191 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(0xffffffff82d8afc8, 0xffffffeaa5d05520, 0, 1) -> e ddb{0}> trace softclock_process_kclock_timeout(fffffd805b8edf00,0) 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(ffffffff82c0cff0) at sched_idle+0x41e sys/kern/kern_sched.c:191 end trace frame: 0x0, count: -6 ddb{0}> show registers rdi 0xfffffd805b8edf00 rsi 0 rbp 0xffff80002115f0f0 rbx 0 rdx 0 rcx 0xffff800021159a90 rax 0xffffffff90baabe3 end+0xddaabe3 r8 0 r9 0 r10 0xade98baca5f40608 r11 0x4f3b4595a3aead13 r12 0x8fde17b634848385 r13 0xffffffff82d0f170 rdrand_tmo r14 0xfffffd805b8edf00 r15 0xffffffeb23003a90 rip 0xffffffff81ab9c7e softclock_process_kclock_timeout+0x3e cs 0x8 rflags 0x10287 __ALIGN_SIZE+0xf287 rsp 0xffff80002115f0a0 ss 0x10 softclock_process_kclock_timeout+0x3e: movq timeout_kclock(%r15),%r13 ddb{0}> show proc PROC (idle0) tid=502718 pid=11619 tcnt=1 stat=onproc flags process=14000 proc=40000200 runpri=0, usrpri=50, slppri=0, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xdf3754c9a0b68448, list=0xffff800021159d38,0xffff800021159000 process=0xffff8000ffffe9e0 user=0xffff80002115a000, vmspace=0xffffffff82cf05b8 estcpu=0, cpticks=61859, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 74352 198857 71193 0 3 0x80 fsleep syz-executor.4 74352 164134 71193 0 3 0x4000080 netio syz-executor.4 18378 451762 41962 0 3 0x82 piperd syz-executor.7 42805 244657 41962 0 3 0x82 piperd syz-executor.1 79823 327263 41962 0 3 0x82 piperd syz-executor.2 11805 393680 41962 0 3 0x82 piperd syz-executor.5 10216 155869 1 0 3 0x100083 ttyin getty 49578 92375 0 0 3 0x14280 nfsidl nfsio 37980 176045 0 0 3 0x14280 nfsidl nfsio 47848 504705 0 0 3 0x14280 nfsidl nfsio 57824 31493 0 0 3 0x14280 nfsidl nfsio 72051 346703 0 0 3 0x14280 nfsidl nfsio 22653 286501 0 0 3 0x14280 nfsidl nfsio 50059 291955 0 0 3 0x14280 nfsidl nfsio 71605 287052 0 0 3 0x14280 nfsidl nfsio 78384 459545 0 0 3 0x14280 nfsidl nfsio 44595 199264 0 0 3 0x14280 nfsidl nfsio 78606 42418 0 0 3 0x14280 nfsidl nfsio 52219 292380 0 0 3 0x14280 nfsidl nfsio 61713 286005 0 0 3 0x14280 nfsidl nfsio 28272 360916 0 0 3 0x14280 nfsidl nfsio 57268 236548 0 0 3 0x14280 nfsidl nfsio 12253 318897 0 0 3 0x14280 nfsidl nfsio 20795 149639 0 0 3 0x14280 nfsidl nfsio 89744 284944 0 0 3 0x14280 nfsidl nfsio 66121 178256 0 0 3 0x14280 nfsidl nfsio 34411 297581 0 0 3 0x14280 nfsidl nfsio 39352 52166 41962 0 3 0x82 piperd syz-executor.3 30903 72950 41962 0 3 0x82 piperd syz-executor.6 93332 413329 0 0 3 0x14200 acct acct 71193 506714 41962 0 3 0x82 nanoslp syz-executor.4 12254 344957 41962 0 3 0x82 piperd syz-executor.0 8443 145592 0 0 3 0x14200 bored sosplice 41962 509525 22114 0 3 0x2000082 wait syz-fuzzer 41962 74170 22114 0 2 0x6000482 syz-fuzzer 41962 325095 22114 0 3 0x6000082 wait syz-fuzzer 41962 98281 22114 0 3 0x6000082 wait syz-fuzzer 41962 354806 22114 0 3 0x6000082 thrsleep syz-fuzzer 41962 207279 22114 0 3 0x6000082 thrsleep syz-fuzzer 41962 308627 22114 0 3 0x6000082 thrsleep syz-fuzzer 41962 348402 22114 0 3 0x6000082 wait syz-fuzzer 41962 520992 22114 0 3 0x6000082 kqread syz-fuzzer 41962 118334 22114 0 3 0x6000082 wait syz-fuzzer 41962 454859 22114 0 3 0x6000082 thrsleep syz-fuzzer 41962 247659 22114 0 3 0x6000082 thrsleep syz-fuzzer 41962 273796 22114 0 3 0x6000082 wait syz-fuzzer 41962 369725 22114 0 3 0x6000082 thrsleep syz-fuzzer 41962 14308 22114 0 3 0x6000082 wait syz-fuzzer 41962 503636 22114 0 3 0x6000082 wait syz-fuzzer 22114 182337 52558 0 3 0x10008a sigsusp ksh 52558 500219 55923 0 3 0x9a kqread sshd 55923 459934 1 0 3 0x88 kqread sshd 62561 167263 6151 74 3 0x1100092 bpf pflogd 6151 286765 1 0 3 0x80 netio pflogd 80062 13843 49775 73 3 0x1100090 kqread syslogd 49775 245997 1 0 3 0x100082 netio syslogd 82644 429995 1 0 3 0x100080 kqread resolvd 40265 90309 52372 77 3 0x100092 kqread dhcpleased 25522 514180 52372 77 3 0x100092 kqread dhcpleased 52372 393424 1 0 3 0x80 kqread dhcpleased 9934 66916 0 0 3 0x14200 bored smr 30165 3542 0 0 3 0x14200 pgzero zerothread 75340 196813 0 0 3 0x14200 aiodoned aiodoned 60022 191358 0 0 3 0x14200 syncer update 62691 206000 0 0 3 0x14200 cleaner cleaner 38305 199059 0 0 3 0x14200 reaper reaper 25020 198782 0 0 3 0x14200 pgdaemon pagedaemon 42804 412641 0 0 3 0x14200 bored viomb 55200 69287 0 0 3 0x40014200 acpi0 acpi0 48509 265218 0 0 7 0x40014200 idle1 74468 439261 0 0 3 0x14200 bored softnet3 26803 342382 0 0 3 0x14200 bored softnet2 71863 505165 0 0 3 0x14200 bored softnet1 83584 483535 0 0 3 0x14200 bored softnet0 68083 23144 0 0 3 0x14200 bored systqmp 19531 12948 0 0 3 0x14200 bored systq 87558 92516 0 0 3 0x14200 tmoslp softclockmp 25768 202147 0 0 3 0x40014200 tmoslp softclock *11619 502718 0 0 7 0x40014200 idle0 1 505904 0 0 3 0x82 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 (0xffffffff82be0820) #0 witness_lock+0x447 #1 mtx_enter_try+0x104 #2 mtx_enter+0x4f sys/kern/kern_lock.c:266 #3 softclock_process_tick_timeout+0x1b2 sys/kern/kern_timeout.c:722 #4 softclock+0x130 sys/kern/kern_timeout.c:748 #5 softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90 #6 Xsoftclock+0x27 #7 acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 #8 sched_idle+0x41e sys/kern/kern_sched.c:191 #9 proc_trampoline+0x1c Process 11619 (idle0) thread 0xffff800021159a90 (502718) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10271 6523K 8764K 78643K 47645 0 pcb 14 20K 24K 78643K 13838 0 rtable 248 15K 15K 78643K 1918 0 pf 41 11K 11K 78643K 406 0 ifaddr 49 17K 18K 78643K 331 0 ifgroup 70 2K 3K 78643K 682 0 sysctl 3 0K 0K 78643K 13 0 counters 68 36K 37K 78643K 414 0 ioctlops 0 0K 4K 78643K 2474 0 iov 0 0K 24K 78643K 1715 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1607 100K 101K 78643K 13887 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 193 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 5145 0 dirhash 12 2K 3K 78643K 126 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 11 37K 89K 78643K 18284 0 sigio 0 0K 0K 78643K 1133 0 proc 72 91K 140K 78643K 2308 0 subproc 104 6K 6K 78643K 533 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 1291 0 in_multi 99 7K 7K 78643K 647 0 ether_multi 1 0K 0K 78643K 23 0 mrt 1 0K 0K 78643K 18 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 409 1818K 1818K 78643K 409 0 exec 0 0K 1K 78643K 2518 0 pfkey data 0 0K 0K 78643K 67 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 8 62K 64K 78643K 10 0 UVM amap 596 859K 876K 78643K 177333 0 UVM aobj 131 8K 8K 78643K 154 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 619 0 NDP 16 0K 1K 78643K 271 0 temp 74 5920K 6556K 78643K 212089 0 kqueue 13 20K 30K 78643K 1257 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 120 777 0 774 9 8 1 4 0 8 0 rtentry 112 513 0 399 4 0 4 4 0 8 0 unpcb 144 17290 0 17275 184 183 1 10 0 8 0 syncache 304 142 0 142 29 29 0 1 0 8 0 sackhl 24 1 1 1 1 1 0 1 0 8 0 tcpqe 32 233 0 233 25 25 0 1 0 8 0 tcpcb 808 4722 0 4707 138 136 2 9 0 8 0 arp 120 88 0 69 1 0 1 1 0 8 0 inpcb 368 23906 0 23884 315 312 3 19 0 8 0 nd6 136 139 0 112 2 1 1 2 0 8 0 pkpcb 40 165 0 165 11 11 0 2 0 8 0 kcovpl 48 41 0 33 1 0 1 1 0 8 0 ppxss 1256 45 0 44 12 11 1 1 0 8 0 pffrag 232 326 0 324 4 3 1 1 0 482 0 pffrnode 88 323 0 321 4 3 1 1 0 8 0 pffrent 40 806 0 804 4 3 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 24 475 0 450 1 0 1 1 0 8 0 pfstkey 128 475 0 450 2 0 2 2 0 8 0 pfstate 376 475 0 450 10 5 5 5 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 1999 0 1528 34 4 30 31 0 8 0 art_table 32 2000 0 1528 4 0 4 4 0 8 0 art_node 16 494 0 390 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 0 1 0 1 1 0 8 0 semapl 112 5143 0 5133 1 0 1 1 0 8 0 shmpl 112 151 0 23 4 0 4 4 0 8 0 dirhash 1024 93 0 76 3 0 3 3 0 8 0 dino2pl 256 26925 0 25334 100 0 100 100 0 8 0 ffsino 272 26925 0 25334 108 1 107 107 0 8 0 nchpl 144 51373 0 49734 64 0 64 64 0 8 0 uvmvnodes 80 6684 0 0 137 0 137 137 0 8 0 vnodes 216 6684 0 0 372 0 372 372 0 8 0 namei 1024 172458 0 172458 14 13 1 2 0 8 1 percpumem 16 220 0 173 1 0 1 1 0 8 0 vcpupl 2048 123 0 0 16 0 16 16 0 8 0 vmpool 696 126 0 3 12 0 12 12 0 8 0 kstatmem 264 378 0 346 9 6 3 3 0 8 0 scxspl 216 148978 0 148978 38 37 1 8 1 8 1 plimitpl 152 2328 0 2312 1 0 1 1 0 8 0 sigapl 424 18829 0 18765 9 1 8 8 0 8 0 futexpl 64 170949 0 170948 5 4 1 1 0 8 0 knotepl 120 1068 0 0 19 4 15 19 0 8 0 kqueuepl 216 3059 0 3050 55 54 1 8 0 8 0 pipepl 320 4250 0 4222 87 84 3 8 0 8 0 fdescpl 496 18528 0 18504 5 0 5 5 0 8 0 filepl 152 127565 0 127325 203 193 10 24 0 8 0 lockfpl 104 10155 0 10153 25 24 1 4 0 8 0 lockfspl 48 4521 0 4519 5 4 1 2 0 8 0 sessionpl 144 60 0 43 1 0 1 1 0 8 0 pgrppl 48 260 0 243 1 0 1 1 0 8 0 ucredpl 104 19169 0 19149 1 0 1 1 0 8 0 zombiepl 144 18765 0 18765 2 1 1 1 0 8 1 processpl 1072 18829 0 18765 5 0 5 5 0 8 0 procpl 680 49418 0 49338 22 13 9 10 0 8 0 srpgc 96 1 0 1 1 1 0 1 0 8 0 sosppl 168 164 0 164 17 16 1 1 0 8 1 sockpl 488 42772 0 42735 867 861 6 35 0 8 0 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 18 0 0 3 0 3 3 0 8 0 mcl12k 12288 25 0 0 2 0 2 2 0 8 0 mcl9k 9216 17 0 0 2 0 2 2 0 8 0 mcl8k 8192 41 0 0 3 0 3 3 0 8 0 mcl4k 4096 41 0 0 3 0 3 3 0 8 0 mcl2k2 2112 9 0 0 1 0 1 1 0 8 0 mcl2k 2048 511 0 0 34 10 24 34 0 8 0 mtagpl 96 1866 0 0 31 0 31 31 0 8 0 mbufpl 256 4779 0 0 245 0 245 245 0 8 0 bufpl 288 34279 0 27594 479 1 478 478 0 8 0 anonpl 24 1763866 0 1748846 175 45 130 130 0 186 0 amapchunkpl 152 565436 0 564595 118 63 55 55 0 158 15 amappl16 200 34897 0 34175 148 109 39 40 0 8 0 amappl15 192 46 0 46 4 4 0 1 0 8 0 amappl14 184 268 0 252 2 1 1 2 0 8 0 amappl13 176 15 0 14 1 0 1 1 0 8 0 amappl12 168 19717 0 19689 4 2 2 3 0 8 0 amappl11 160 68 0 53 1 0 1 1 0 8 0 amappl10 152 89 0 77 1 0 1 1 0 8 0 amappl9 144 491 0 490 1 0 1 1 0 8 0 amappl8 136 900 0 701 8 0 8 8 0 8 0 amappl7 128 160 0 143 2 0 2 2 0 8 0 amappl6 120 614 0 579 6 4 2 2 0 8 0 amappl5 112 632 0 621 1 0 1 1 0 8 0 amappl4 104 1091 0 1038 3 1 2 3 0 8 0 amappl3 96 110122 0 110057 4 1 3 3 0 8 0 amappl2 88 19393 0 19318 3 1 2 3 0 8 0 amappl1 80 76373 0 75831 23 11 12 23 0 8 0 amappl 88 176011 0 175719 9 1 8 9 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 72 153 0 23 3 0 3 3 0 8 0 uaddrrnd 24 18654 0 18507 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 18654 0 18507 1 0 1 1 0 8 0 vmmpekpl 168 137053 0 136969 5 0 5 5 0 8 0 vmmpepl 168 1093022 0 1090301 505 366 139 168 0 357 3 vmsppl 464 18653 0 18507 20 0 20 20 0 8 0 rwobjpl 56 262638 0 253815 142 16 126 126 0 8 0 pdppl 4096 37316 0 37137 954 761 193 193 0 8 14 pvpl 32 4749741 0 4729357 456 239 217 351 0 265 0 pmappl 248 18653 0 18507 10 0 10 10 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 2490 0 1264 36 0 36 36 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace softclock_process_kclock_timeout(fffffd805b8edf00,0) 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(ffffffff82c0cff0) at sched_idle+0x41e sys/kern/kern_sched.c:191 end trace frame: 0x0, count: -6 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffff800020d48ff0) 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(ffff800020d48ff0) at sched_idle+0x41e sys/kern/kern_sched.c:191 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff800020d48ff0) 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(ffff800020d48ff0) at sched_idle+0x41e sys/kern/kern_sched.c:191 end trace frame: 0x0, count: -5