uvm_fault(0xffffffff83933440, 0xffff800029ef5000, 0, 1) -> e kernel: page fault trap, code=0 Stopped at pvclock_get+0x53: movl 0(%r15),%r12d TID PID UID PRFLAGS PFLAGS CPU COMMAND *254397 96776 0 0 0x4000000 0 syz-executor pvclock_get(ffffffff8386b9c0) at pvclock_get+0x53 pvclock_read_begin sys/dev/pv/pvclock.c:278 [inline] pvclock_get(ffffffff8386b9c0) at pvclock_get+0x53 sys/dev/pv/pvclock.c:333 nanouptime(ffff80002a7ab870) at nanouptime+0x61 tc_delta sys/kern/kern_tc.c:138 [inline] nanouptime(ffff80002a7ab870) at nanouptime+0x61 binuptime sys/kern/kern_tc.c:191 [inline] nanouptime(ffff80002a7ab870) at nanouptime+0x61 sys/kern/kern_tc.c:217 clock_gettime(ffff80002f0c1770,3,ffff80002a7ab870) at clock_gettime+0xab sys/kern/kern_time.c:129 sys_clock_gettime(ffff80002f0c1770,ffff80002a7ab990,ffff80002a7ab8e0) at sys_clock_gettime+0x57 sys/kern/kern_time.c:173 syscall(ffff80002a7ab990) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a7ab990) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xfa8a77a4240, 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> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic *cpu0: uvm_fault(0xffffffff83933440, 0xffff800029ef5000, 0, 1) -> e ddb> trace pvclock_get(ffffffff8386b9c0) at pvclock_get+0x53 pvclock_read_begin sys/dev/pv/pvclock.c:278 [inline] pvclock_get(ffffffff8386b9c0) at pvclock_get+0x53 sys/dev/pv/pvclock.c:333 nanouptime(ffff80002a7ab870) at nanouptime+0x61 tc_delta sys/kern/kern_tc.c:138 [inline] nanouptime(ffff80002a7ab870) at nanouptime+0x61 binuptime sys/kern/kern_tc.c:191 [inline] nanouptime(ffff80002a7ab870) at nanouptime+0x61 sys/kern/kern_tc.c:217 clock_gettime(ffff80002f0c1770,3,ffff80002a7ab870) at clock_gettime+0xab sys/kern/kern_time.c:129 sys_clock_gettime(ffff80002f0c1770,ffff80002a7ab990,ffff80002a7ab8e0) at sys_clock_gettime+0x57 sys/kern/kern_time.c:173 syscall(ffff80002a7ab990) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a7ab990) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xfa8a77a4240, count: -6 ddb> show registers rdi 0xffff80002a8b4000 rsi 0x44f1b acpi_pdirpa+0x30d8c rbp 0xffff80002a7ab740 rbx 0xffffffff838a7118 th1 rdx 0xffff80002a8b4000 rcx 0x44f1a acpi_pdirpa+0x30d8b rax 0 r8 0xffffffff81f01a40 uvm_map_inentry_sp r9 0 r10 0 r11 0x9dda749865402c08 r12 0x3 r13 0xe72 r14 0xffffffff8386b9c0 pvclock_timecounter r15 0xffff800029ef5000 rip 0xffffffff81a56103 pvclock_get+0x53 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002a7ab6f0 ss 0x10 pvclock_get+0x53: movl 0(%r15),%r12d ddb> show proc PROC (syz-executor) tid=254397 pid=96776 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002f0c0548,0xffff80002f0c0fb8 process=0xffff8000ffff8d98 user=0xffff80002a7a6000, vmspace=0xfffffd806cb24d00 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 32371 472036 90357 0 2 0 syz-executor 32371 372592 90357 0 2 0x4000000 syz-executor 65867 131409 70928 0 2 0 syz-executor 65867 366119 70928 0 3 0x4000080 fsleep syz-executor 74711 97337 84569 0 2 0 syz-executor 74711 511264 84569 0 3 0x4000080 fsleep syz-executor 22877 360489 74937 0 2 0 syz-executor 96776 459304 18708 0 2 0 syz-executor *96776 254397 18708 0 7 0x4000000 syz-executor 33129 272552 38737 0 3 0x80 nanoslp syz-executor 33129 477260 38737 0 3 0x4000000 smrbar syz-executor 71901 349779 46967 -1 3 0x90 nanoslp syz-executor 71901 454474 46967 -1 3 0x4000090 piperd syz-executor 71901 326918 46967 -1 3 0x4000090 fsleep syz-executor 72884 194616 95594 -1 3 0x90 nanoslp syz-executor 72884 151271 95594 -1 3 0x4000090 kqsel syz-executor 72884 105359 95594 -1 3 0x4000090 fsleep syz-executor 96449 291525 1 0 3 0x100083 ttyin getty 91393 459868 0 0 3 0x14200 acct acct 38737 394368 21013 0 3 0x82 nanoslp syz-executor 46967 455865 21013 0 3 0x82 nanoslp syz-executor 74937 135915 21013 0 3 0x82 nanoslp syz-executor 90357 486700 21013 0 3 0x82 nanoslp syz-executor 95594 37131 21013 0 3 0x82 nanoslp syz-executor 84569 266082 21013 0 3 0x82 nanoslp syz-executor 70928 242116 21013 0 3 0x82 nanoslp syz-executor 18708 437719 21013 0 3 0x82 nanoslp syz-executor 21013 521085 1 0 3 0x82 kqread syz-executor 48429 264914 0 0 3 0x14200 bored smr 93700 496348 0 0 2 0x14200 zerothread 11275 12339 0 0 3 0x14200 aiodoned aiodoned 38257 296389 0 0 3 0x14200 syncer update 13785 39771 0 0 3 0x14200 cleaner cleaner 15487 13418 0 0 3 0x14200 reaper reaper 17660 227713 0 0 3 0x14200 pgdaemon pagedaemon 98968 486714 0 0 3 0x14200 bored viomb 75950 516326 0 0 3 0x40014200 acpi0 acpi0 18230 477207 0 0 3 0x14200 bored softnet0 56167 300101 0 0 3 0x14200 smrbar systqmp 21298 15498 0 0 3 0x14200 bored systq 74069 70606 0 0 3 0x40014200 tmoslp softclock 10930 5462 0 0 3 0x40014200 idle0 1 166123 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb>