uvm_fault(0xfffffd807efff5c0, 0x0, 0, 1) -> e kernel: page fault trap, code=0 Stopped at uvm_fault_lower+0xbb1: movq 0(%rbx),%rdi TID PID UID PRFLAGS PFLAGS CPU COMMAND *118503 3059 32767 0x10 0x4000000 0K syz-executor.0 73178 3059 32767 0x10 0x4000000 1 syz-executor.0 uvm_fault_lower(ffff800022c82860,ffff800022c82898,ffff800022c827e0,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325 uvm_fault(fffffd807efff5c0,20001000,0,1) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640 kpageflttrap(ffff800022c829f0,20001880) at kpageflttrap+0x1fd sys/arch/amd64/amd64/trap.c:264 kerntrap(ffff800022c829f0) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyin() at copyin+0x53 sys_preadv(ffff8000fffef7a0,ffff800022c82c68,ffff800022c82cc0) at sys_preadv+0x5a sys/kern/vfs_syscalls.c:3281 syscall(ffff800022c82d30) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800022c82d30) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x54a268ae1e0, count: 6 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(0xfffffd807efff5c0, 0x0, 0, 1) -> e ddb{0}> trace uvm_fault_lower(ffff800022c82860,ffff800022c82898,ffff800022c827e0,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325 uvm_fault(fffffd807efff5c0,20001000,0,1) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640 kpageflttrap(ffff800022c829f0,20001880) at kpageflttrap+0x1fd sys/arch/amd64/amd64/trap.c:264 kerntrap(ffff800022c829f0) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyin() at copyin+0x53 sys_preadv(ffff8000fffef7a0,ffff800022c82c68,ffff800022c82cc0) at sys_preadv+0x5a sys/kern/vfs_syscalls.c:3281 syscall(ffff800022c82d30) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800022c82d30) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x54a268ae1e0, count: -9 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff800022c82750 rbx 0 rdx 0 rcx 0 rax 0xffff8000fffef7a0 r8 0xffffffff81a8edde witness_assert+0x1fe r9 0x5 r10 0x7b8692142e2a2504 r11 0x7ca131417f4497a r12 0xffff800022c82860 r13 0xfffffd806ee8c1c0 r14 0 r15 0xffffffff81b25d00 uvn_flush+0x950 rip 0xffffffff817b9101 uvm_fault_lower+0xbb1 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800022c826c0 ss 0 uvm_fault_lower+0xbb1: movq 0(%rbx),%rdi ddb{0}> show proc PROC (syz-executor.0) pid=118503 stat=onproc flags process=10 proc=4000000 pri=36, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000fffeea80,0xffff8000fffef270 process=0xffff8000ffff8c80 user=0xffff800022c7d000, vmspace=0xfffffd807efff5c0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 3059 358539 52422 32767 3 0x90 fsleep syz-executor.0 * 3059 118503 52422 32767 7 0x4000010 syz-executor.0 3059 73178 52422 32767 7 0x4000010 syz-executor.0 3059 66460 52422 32767 2 0x4000010 syz-executor.0 3059 443036 52422 32767 2 0x4000010 syz-executor.0 3059 302799 52422 32767 2 0x4000010 syz-executor.0 3059 200456 52422 32767 2 0x4000010 syz-executor.0 96055 8554 97375 32767 2 0x490 syz-executor.1 97375 136462 45850 0 3 0x82 wait syz-executor.1 52422 292444 36017 32767 3 0x90 nanoslp syz-executor.0 36017 54646 45850 0 3 0x82 wait syz-executor.0 71984 106735 0 0 3 0x14200 bored sosplice 45850 482483 92469 0 3 0x82 thrsleep syz-fuzzer 45850 36142 92469 0 3 0x4000082 thrsleep syz-fuzzer 45850 230367 92469 0 3 0x4000082 thrsleep syz-fuzzer 45850 144915 92469 0 3 0x4000082 thrsleep syz-fuzzer 45850 377465 92469 0 3 0x4000082 kqread syz-fuzzer 45850 70277 92469 0 3 0x4000082 thrsleep syz-fuzzer 45850 232679 92469 0 3 0x4000082 thrsleep syz-fuzzer 45850 127873 92469 0 3 0x4000082 thrsleep syz-fuzzer 92469 435927 8350 0 3 0x10008a sigsusp ksh 8350 190187 79594 0 3 0x9a kqread sshd 24711 395059 1 0 3 0x100083 ttyin getty 79594 325231 1 0 3 0x88 kqread sshd 73679 521954 64276 73 3 0x100090 kqread syslogd 64276 32408 1 0 3 0x100082 netio syslogd 37375 234671 1 0 3 0x100080 kqread resolvd 23092 429083 41410 77 3 0x100092 kqread dhcpleased 84511 514552 41410 77 3 0x100092 kqread dhcpleased 41410 332190 1 0 3 0x80 kqread dhcpleased 90707 383196 0 0 3 0x14200 bored smr 48400 187354 0 0 2 0x14200 zerothread 33473 110198 0 0 3 0x14200 aiodoned aiodoned 73399 161288 0 0 3 0x14200 syncer update 15858 39891 0 0 3 0x14200 cleaner cleaner 48435 198443 0 0 3 0x14200 reaper reaper 15396 165922 0 0 3 0x14200 pgdaemon pagedaemon 43975 461532 0 0 3 0x14200 bored viomb 19536 135930 0 0 3 0x40014200 acpi0 acpi0 20103 99773 0 0 3 0x40014200 idle1 47953 414578 0 0 3 0x14200 bored softnet 12663 309070 0 0 3 0x14200 bored systqmp 87411 255504 0 0 3 0x14200 bored systq 68052 355588 0 0 3 0x40014200 bored softclock 90984 364374 0 0 3 0x40014200 idle0 1 51212 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 3059 (syz-executor.0) thread 0xffff8000fffef7a0 (118503) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff828b70b8) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 __mp_acquire_count+0x4c sys/kern/kern_lock.c:227 #2 mi_switch+0x3d3 sys/kern/sched_bsd.c:416 #3 sleep_finish+0x1b2 sys/kern/kern_synch.c:433 #4 rw_enter+0x35b sys/kern/kern_rwlock.c:286 #5 uvmfault_relock+0x6f sys/uvm/uvm_fault.c:1801 #6 uvm_fault_lower+0x931 sys/uvm/uvm_fault.c:1288 #7 uvm_fault+0x24f sys/uvm/uvm_fault.c:640 #8 kpageflttrap+0x1fd sys/arch/amd64/amd64/trap.c:264 #9 kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 #10 alltraps_kern_meltdown+0x7b #11 copyin+0x53 #12 sys_preadv+0x5a sys/kern/vfs_syscalls.c:3281 #13 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #13 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #14 Xsyscall+0x128 Process 3059 (syz-executor.0) thread 0xffff8000fffef260 (73178) exclusive rwlock vmmaplk r = 0 (0xfffffd807efff5d8) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 rw_enter+0x3e2 sys/kern/kern_rwlock.c:310 #2 vm_map_lock_ln+0xda sys/uvm/uvm_map.c:5458 #3 uvmfault_lookup+0xc2 sys/uvm/uvm_fault.c:1739 #4 uvm_fault_check+0x607 uvmfault_amapcopy sys/uvm/uvm_fault.c:236 [inline] #4 uvm_fault_check+0x607 sys/uvm/uvm_fault.c:714 #5 uvm_fault+0x102 sys/uvm/uvm_fault.c:602 #6 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #7 usertrap+0x214 sys/arch/amd64/amd64/trap.c:403 #8 recall_trap+0x8 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10175 6397K 6416K 78643K 11300 0 pcb 13 12K 14K 78643K 17 0 rtable 106 3K 4K 78643K 1495 0 ifaddr 39 10K 10K 78643K 118 0 sysctl 3 1K 3K 78643K 6 0 counters 44 34K 34K 78643K 66 0 ioctlops 0 0K 2K 78643K 278 0 iov 0 0K 24K 78643K 1922 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1209 76K 76K 78643K 3154 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 114 0 VM map 2 1K 1K 78643K 2 0 sem 10 1K 1K 78643K 11 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 7 21K 33K 78643K 11947 0 sigio 0 0K 0K 78643K 106 0 proc 56 74K 99K 78643K 1420 0 subproc 26 1K 1K 78643K 169 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 944 0 in_multi 33 2K 2K 78643K 254 0 ether_multi 1 0K 0K 78643K 48 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 367 1632K 1632K 78643K 367 0 exec 0 0K 2K 78643K 1966 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 280 39K 54K 78643K 160184 0 UVM aobj 131 4K 4K 78643K 137 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 381 0 NDP 7 0K 0K 78643K 42 0 temp 76 4195K 4307K 78643K 29785 0 kqueue 12 18K 28K 78643K 866 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 1569 0 1566 25 24 1 5 0 8 0 rtentry 112 178 0 134 2 0 2 2 0 8 0 unpcb 128 11444 0 11431 114 109 5 9 0 8 4 syncache 296 69 0 69 24 23 1 1 0 8 1 tcpqe 32 41 0 41 18 17 1 1 0 8 1 tcpcb 736 4657 0 4649 160 154 6 17 0 8 4 arp 120 30 0 24 1 0 1 1 0 8 0 ipq 40 19 0 19 9 9 0 1 0 8 0 ipqe 40 121 0 121 9 9 0 1 0 8 0 inpcb 304 13061 0 13051 170 164 6 14 0 8 4 rttmr 72 141 0 140 3 2 1 1 0 8 0 ip6q 72 79 0 78 8 7 1 1 0 8 0 ip6af 40 153 0 152 8 7 1 1 0 8 0 nd6 48 48 0 42 1 0 1 1 0 8 0 kcovpl 48 13 0 11 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 752 0 561 17 4 13 14 0 8 1 art_table 32 753 0 561 2 0 2 2 0 8 0 art_node 16 177 0 137 1 0 1 1 0 8 0 sysvmsgpl 40 18 0 7 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 8 0 0 1 0 1 1 0 8 0 shmpl 112 134 0 6 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 16928 0 15496 94 4 90 90 0 8 0 ffsino 272 16928 0 15496 96 0 96 96 0 8 0 nchpl 144 35297 0 33694 64 3 61 61 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 224 5926 0 0 349 0 349 349 0 8 0 namei 1024 119032 0 119032 5 4 1 1 0 8 1 percpumem 16 45 0 11 1 0 1 1 0 8 0 scxspl 216 103862 0 103862 41 38 3 8 0 8 3 plimitpl 152 2167 0 2157 1 0 1 1 0 8 0 sigapl 424 12136 0 12103 4 0 4 4 0 8 0 futexpl 64 95368 0 95367 6 5 1 1 0 8 0 knotepl 112 241 0 0 3 0 3 3 0 8 0 kqueuepl 216 4729 0 4717 86 85 1 8 0 8 0 pipepl 336 3333 0 3323 116 114 2 11 0 8 1 fdescpl 496 12121 0 12103 3 0 3 3 0 8 0 filepl 152 95632 0 95526 175 165 10 14 0 8 5 lockfpl 104 1714 0 1712 2 1 1 2 0 8 0 lockfspl 48 481 0 479 1 0 1 1 0 8 0 sessionpl 144 28 0 18 1 0 1 1 0 8 0 pgrppl 48 292 0 282 1 0 1 1 0 8 0 ucredpl 96 12865 0 12853 1 0 1 1 0 8 0 zombiepl 144 12103 0 12102 1 0 1 1 0 8 0 processpl 1064 12136 0 12102 3 0 3 3 0 8 0 procpl 672 38614 0 38567 26 21 5 6 0 8 1 sosppl 168 201 0 201 26 25 1 1 0 8 1 sockpl 480 26286 0 26260 589 569 20 34 0 8 16 mcl64k 65536 42 0 0 4 1 3 3 0 8 0 mcl16k 16384 33 0 0 4 1 3 3 0 8 0 mcl12k 12288 68 0 0 3 1 2 2 0 8 0 mcl9k 9216 36 0 0 3 1 2 2 0 8 0 mcl8k 8192 18 0 0 3 0 3 3 0 8 0 mcl4k 4096 41 0 0 5 2 3 3 0 8 0 mcl2k2 2112 10 0 0 1 0 1 1 0 8 0 mcl2k 2048 214 0 0 19 1 18 19 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 13353 0 0 817 0 817 817 0 8 0 bufpl 288 24326 0 18001 452 0 452 452 0 8 0 anonpl 24 3581080 0 3570266 331 250 81 107 0 186 0 amapchunkpl 152 399902 0 399328 135 110 25 38 0 158 1 amappl16 200 32878 0 32515 165 144 21 32 0 8 1 amappl15 192 2839 0 2834 1 0 1 1 0 8 0 amappl14 184 15 0 11 1 0 1 1 0 8 0 amappl13 176 442 0 441 1 0 1 1 0 8 0 amappl12 168 47 0 41 1 0 1 1 0 8 0 amappl11 160 2318 0 2301 1 0 1 1 0 8 0 amappl10 152 4435 0 4433 1 0 1 1 0 8 0 amappl9 144 796 0 793 1 0 1 1 0 8 0 amappl8 136 2184 0 2090 4 0 4 4 0 8 0 amappl7 128 1582 0 1575 1 0 1 1 0 8 0 amappl6 120 642 0 626 1 0 1 1 0 8 0 amappl5 112 16843 0 16824 1 0 1 1 0 8 0 amappl4 104 3297 0 3267 1 0 1 1 0 8 0 amappl3 96 1065 0 1047 1 0 1 1 0 8 0 amappl2 88 13261 0 13219 6 5 1 2 0 8 0 amappl1 80 213765 0 213336 12 2 10 12 0 8 0 amappl 88 159217 0 159043 7 2 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 72 136 0 6 3 0 3 3 0 8 0 uaddrrnd 24 12121 0 12103 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 12121 0 12103 1 0 1 1 0 8 0 vmmpekpl 168 96940 0 96914 2 0 2 2 0 8 0 vmmpepl 168 1123922 0 1122195 268 171 97 97 0 357 17 vmsppl 368 12120 0 12103 2 0 2 2 0 8 0 rwobjpl 56 284112 0 276911 136 33 103 105 0 8 1 pdppl 4096 24250 0 24206 71 25 46 50 0 8 2 pvpl 32 5967980 0 5953687 544 403 141 206 0 265 4 pmappl 248 12120 0 12103 2 0 2 2 0 8 0 extentpl 40 57 0 38 1 0 1 1 0 8 0 phpool 112 1872 0 312 46 1 45 45 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace uvm_fault_lower(ffff800022c82860,ffff800022c82898,ffff800022c827e0,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325 uvm_fault(fffffd807efff5c0,20001000,0,1) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640 kpageflttrap(ffff800022c829f0,20001880) at kpageflttrap+0x1fd sys/arch/amd64/amd64/trap.c:264 kerntrap(ffff800022c829f0) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyin() at copyin+0x53 sys_preadv(ffff8000fffef7a0,ffff800022c82c68,ffff800022c82cc0) at sys_preadv+0x5a sys/kern/vfs_syscalls.c:3281 syscall(ffff800022c82d30) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800022c82d30) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x54a268ae1e0, count: -9 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+0x44 sys/dev/kcov.c:149 uvm_fault(fffffd807efff5c0,54a64ad9000,0,2) at uvm_fault+0x233 sys/uvm/uvm_fault.c:639 upageflttrap(ffff80002449bf80,54a64ad9438) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 usertrap(ffff80002449bf80) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403 recall_trap() at recall_trap+0x8 end trace frame: 0x0, count: 7 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+0x44 sys/dev/kcov.c:149 uvm_fault(fffffd807efff5c0,54a64ad9000,0,2) at uvm_fault+0x233 sys/uvm/uvm_fault.c:639 upageflttrap(ffff80002449bf80,54a64ad9438) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 usertrap(ffff80002449bf80) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403 recall_trap() at recall_trap+0x8 end trace frame: 0x0, count: -8