uvm_fault(0xfffffd807efff450, 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 *194589 37810 32767 0x10 0 0K syz-executor.0 58825 46618 32767 0x10 0 1 syz-executor.1 uvm_fault_lower(ffff80002466dff0,ffff80002466e028,ffff80002466df70,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325 uvm_fault(fffffd807efff450,20000000,0,2) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640 upageflttrap(ffff80002466e160,20000100) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 usertrap(ffff80002466e160) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7f7ffffe7650, count: 10 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(0xfffffd807efff450, 0x0, 0, 1) -> e ddb{0}> trace uvm_fault_lower(ffff80002466dff0,ffff80002466e028,ffff80002466df70,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325 uvm_fault(fffffd807efff450,20000000,0,2) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640 upageflttrap(ffff80002466e160,20000100) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 usertrap(ffff80002466e160) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7f7ffffe7650, count: -5 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80002466dee0 rbx 0 rdx 0 rcx 0xfffffd80033c1400 rax 0xffff8000fffee7e0 r8 0xffffffff81b80722 setrunnable+0xa2 r9 0x5 r10 0xbcdc5c948ea1fc38 r11 0x1ec4264617b8a448 r12 0xffff80002466dff0 r13 0xfffffd8069290ee0 r14 0 r15 0x6d4 rip 0xffffffff817b9101 uvm_fault_lower+0xbb1 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002466de50 ss 0x10 uvm_fault_lower+0xbb1: movq 0(%rbx),%rdi ddb{0}> show proc PROC (syz-executor.0) pid=194589 stat=onproc flags process=10 proc=0 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000fffef500,0xffff8000fffefcf0 process=0xffff8000ffff8430 user=0xffff800024669000, vmspace=0xfffffd807efff450 estcpu=36, cpticks=8, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND *37810 194589 11395 32767 7 0x10 syz-executor.0 37810 422322 11395 32767 3 0x4000090 fsleep syz-executor.0 37810 230368 11395 32767 3 0x4000090 fsleep syz-executor.0 37810 271673 11395 32767 2 0x4000010 syz-executor.0 11395 2763 75537 32767 2 0x490 syz-executor.0 75537 376130 18439 0 3 0x82 wait syz-executor.0 46618 58825 77526 32767 7 0x10 syz-executor.1 77526 233292 18439 0 3 0x82 wait syz-executor.1 85927 402918 0 0 3 0x14200 bored sosplice 18439 254992 97485 0 3 0x82 thrsleep syz-fuzzer 18439 387332 97485 0 3 0x4000082 nanoslp syz-fuzzer 18439 127999 97485 0 3 0x4000082 thrsleep syz-fuzzer 18439 507028 97485 0 3 0x4000082 kqread syz-fuzzer 18439 413202 97485 0 3 0x4000082 thrsleep syz-fuzzer 18439 4945 97485 0 3 0x4000082 thrsleep syz-fuzzer 18439 260482 97485 0 3 0x4000082 thrsleep syz-fuzzer 18439 71696 97485 0 3 0x4000082 thrsleep syz-fuzzer 97485 367179 57863 0 3 0x10008a sigsusp ksh 57863 149887 83403 0 3 0x9a kqread sshd 45552 411337 1 0 3 0x100083 ttyin getty 83403 316348 1 0 3 0x88 kqread sshd 42905 158389 58258 73 3 0x100090 kqread syslogd 58258 22406 1 0 3 0x100082 netio syslogd 42334 6275 1 0 3 0x100080 kqread resolvd 6644 512614 19989 77 3 0x100092 kqread dhcpleased 45606 116893 19989 77 3 0x100092 kqread dhcpleased 19989 156577 1 0 3 0x80 kqread dhcpleased 55093 230206 0 0 3 0x14200 bored smr 3684 185387 0 0 2 0x14200 zerothread 78891 32084 0 0 3 0x14200 aiodoned aiodoned 29895 502681 0 0 3 0x14200 syncer update 96633 432122 0 0 3 0x14200 cleaner cleaner 87376 127509 0 0 3 0x14200 reaper reaper 11335 190444 0 0 3 0x14200 pgdaemon pagedaemon 21902 225504 0 0 3 0x14200 bored viomb 88235 45204 0 0 3 0x40014200 acpi0 acpi0 42469 242875 0 0 3 0x40014200 idle1 25007 350966 0 0 3 0x14200 bored softnet 25549 364022 0 0 3 0x14200 bored systqmp 96152 411942 0 0 3 0x14200 bored systq 39722 343672 0 0 2 0x40014200 softclock 2112 255539 0 0 3 0x40014200 idle0 1 479968 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 37810 (syz-executor.0) thread 0xffff8000fffee7e0 (194589) 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 uvm_fault_lower+0x95d sys/uvm/uvm_fault.c:1290 #6 uvm_fault+0x24f sys/uvm/uvm_fault.c:640 #7 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #8 usertrap+0x214 sys/arch/amd64/amd64/trap.c:403 #9 recall_trap+0x8 Process 46618 (syz-executor.1) thread 0xffff8000fffef7a0 (58825) exclusive rrwlock inode r = 0 (0xfffffd8065ee8f80) #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 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 ufs_ihashins+0x42 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1347 #6 ffs_inode_alloc+0x1c3 sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1162 #8 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:404 #9 domkdirat+0x121 sys/kern/vfs_syscalls.c:3065 #10 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #10 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd80689d21b8) #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 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:579 #5 vfs_lookup+0xdd sys/kern/vfs_lookup.c:413 #6 namei+0x55a sys/kern/vfs_lookup.c:245 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3050 #8 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10173 6397K 6416K 78643K 11403 0 pcb 13 12K 14K 78643K 17 0 rtable 106 3K 4K 78643K 4199 0 ifaddr 39 10K 10K 78643K 365 0 sysctl 3 1K 5K 78643K 5 0 counters 44 34K 34K 78643K 136 0 ioctlops 0 0K 2K 78643K 213 0 iov 0 0K 32K 78643K 3680 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1209 76K 76K 78643K 11246 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 325 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 10604 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 7 21K 33K 78643K 34105 0 sigio 0 0K 0K 78643K 518 0 proc 56 74K 99K 78643K 3686 0 subproc 26 1K 1K 78643K 624 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 3597 0 in_multi 33 2K 2K 78643K 862 0 ether_multi 1 0K 0K 78643K 142 0 mrt 1 0K 0K 78643K 5 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 355 1579K 1579K 78643K 355 0 exec 0 0K 2K 78643K 5115 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 316 41K 56K 78643K 452348 0 UVM aobj 131 8K 8K 78643K 132 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 1015 0 NDP 5 0K 0K 78643K 147 0 temp 76 4195K 4323K 78643K 82511 0 kqueue 19 21K 30K 78643K 2416 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 3453 0 3450 52 51 1 5 0 8 0 rtentry 112 602 0 558 2 0 2 2 0 8 0 unpcb 128 23708 0 23695 250 249 1 9 0 8 0 syncache 296 312 0 312 67 67 0 1 0 8 0 tcpqe 32 96 0 96 33 33 0 1 0 8 0 tcpcb 736 32269 0 32248 695 685 10 21 0 8 8 arp 120 106 0 100 1 0 1 1 0 8 0 ipq 40 48 0 47 22 21 1 1 0 8 0 ipqe 40 387 0 386 22 21 1 1 0 8 0 inpcb 304 47490 0 47483 518 509 9 12 0 8 8 rttmr 72 28 0 28 6 6 0 1 0 8 0 ip6q 72 144 0 143 18 17 1 1 0 8 0 ip6af 40 276 0 275 18 17 1 1 0 8 0 nd6 48 179 0 173 1 0 1 1 0 8 0 kcovpl 48 48 0 46 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 2674 0 2483 30 17 13 19 0 8 0 art_table 32 2675 0 2483 4 2 2 3 0 8 0 art_node 16 601 0 561 1 0 1 1 0 8 0 sysvmsgpl 40 38 0 35 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 10602 0 10592 1 0 1 1 0 8 0 shmpl 112 129 0 1 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 49745 0 48263 95 1 94 94 0 8 1 ffsino 272 49745 0 48263 101 1 100 100 0 8 0 nchpl 144 95947 0 94347 60 0 60 60 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 329546 0 329545 18 17 1 1 0 8 0 percpumem 16 80 0 46 1 0 1 1 0 8 0 scxspl 216 292681 0 292681 76 75 1 8 0 8 1 plimitpl 152 7346 0 7336 1 0 1 1 0 8 0 sigapl 424 34189 0 34156 5 1 4 5 0 8 0 futexpl 64 261039 0 261037 19 18 1 1 0 8 0 knotepl 112 495 0 0 4 0 4 4 0 8 0 kqueuepl 216 13022 0 12989 286 283 3 10 0 8 1 pipepl 336 8309 0 8299 303 302 1 11 0 8 0 fdescpl 496 34174 0 34156 3 0 3 3 0 8 0 filepl 152 279137 0 279031 479 469 10 14 0 8 5 lockfpl 104 5671 0 5669 10 9 1 4 0 8 0 lockfspl 48 1241 0 1239 1 0 1 1 0 8 0 sessionpl 144 63 0 53 1 0 1 1 0 8 0 pgrppl 48 547 0 537 1 0 1 1 0 8 0 ucredpl 96 58441 0 58429 1 0 1 1 0 8 0 zombiepl 144 34156 0 34156 2 1 1 1 0 8 1 processpl 1064 34189 0 34156 3 0 3 3 0 8 0 procpl 672 109310 0 109267 55 50 5 6 0 8 1 srpgc 96 1 0 1 1 1 0 1 0 8 0 sosppl 168 472 0 472 70 69 1 1 0 8 1 sockpl 480 75645 0 75621 1495 1484 11 34 0 8 7 mcl64k 65536 55 0 0 4 2 2 3 0 8 0 mcl16k 16384 41 0 0 6 3 3 3 0 8 0 mcl12k 12288 105 0 0 2 0 2 2 0 8 0 mcl9k 9216 49 0 0 3 1 2 2 0 8 0 mcl8k 8192 33 0 0 3 0 3 3 0 8 0 mcl4k 4096 73 0 0 7 4 3 3 0 8 0 mcl2k2 2112 22 0 0 2 0 2 2 0 8 0 mcl2k 2048 583 0 0 25 10 15 21 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 5131 0 0 232 6 226 226 0 8 0 bufpl 288 62582 0 56257 453 0 453 453 0 8 0 anonpl 24 10241703 0 10229701 680 591 89 126 0 186 0 amapchunkpl 152 1113543 0 1112963 325 301 24 38 0 158 0 amappl16 200 98695 0 98363 528 509 19 33 0 8 0 amappl15 192 1598 0 1594 1 0 1 1 0 8 0 amappl14 184 367 0 363 1 0 1 1 0 8 0 amappl13 176 2067 0 2065 1 0 1 1 0 8 0 amappl12 168 8783 0 8778 1 0 1 1 0 8 0 amappl11 160 8085 0 8071 1 0 1 1 0 8 0 amappl10 152 4789 0 4785 1 0 1 1 0 8 0 amappl9 144 8886 0 8883 1 0 1 1 0 8 0 amappl8 136 1925 0 1755 8 2 6 6 0 8 0 amappl7 128 513 0 503 1 0 1 1 0 8 0 amappl6 120 8914 0 8899 1 0 1 1 0 8 0 amappl5 112 25015 0 24996 1 0 1 1 0 8 0 amappl4 104 16164 0 16133 3 1 2 2 0 8 0 amappl3 96 12892 0 12873 1 0 1 1 0 8 0 amappl2 88 44349 0 44295 8 6 2 2 0 8 0 amappl1 80 604070 0 603638 12 2 10 12 0 8 0 amappl 88 450307 0 450139 5 0 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 72 131 0 1 3 0 3 3 0 8 0 uaddrrnd 24 34174 0 34156 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 34174 0 34156 1 0 1 1 0 8 0 vmmpekpl 168 270010 0 269990 2 0 2 2 0 8 0 vmmpepl 168 3173521 0 3171759 530 438 92 104 0 357 0 vmsppl 368 34173 0 34156 2 0 2 2 0 8 0 rwobjpl 56 792617 0 785360 219 116 103 107 0 8 0 pdppl 4096 68356 0 68312 77 31 46 50 0 8 2 pvpl 32 17072617 0 17056989 1430 1289 141 230 0 265 0 pmappl 248 34173 0 34156 2 0 2 2 0 8 0 extentpl 40 57 0 38 1 0 1 1 0 8 0 phpool 112 2058 0 1081 32 3 29 29 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace uvm_fault_lower(ffff80002466dff0,ffff80002466e028,ffff80002466df70,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325 uvm_fault(fffffd807efff450,20000000,0,2) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640 upageflttrap(ffff80002466e160,20000100) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 usertrap(ffff80002466e160) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7f7ffffe7650, count: -5 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 __mp_lock(ffffffff828b6eb0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828b6eb0) at __mp_lock+0x122 sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff828b6eb0,1) at __mp_acquire_count+0x4c sys/kern/kern_lock.c:227 mi_switch() at mi_switch+0x3d3 sys/kern/sched_bsd.c:416 sleep_finish(ffff800024677d80,1) at sleep_finish+0x1b2 sys/kern/kern_synch.c:433 tsleep(fffffd8069918150,11,ffffffff824c291d,0) at tsleep+0x125 sys/kern/kern_synch.c:158 biowait(fffffd8069918150) at biowait+0x91 sys/kern/vfs_bio.c:1271 bwrite(fffffd8069918150) at bwrite+0x21d sys/kern/vfs_bio.c:772 ffs_update(fffffd8065ee8ee8,1) at ffs_update+0x2b5 sys/ufs/ffs/ffs_inode.c:113 ufs_mkdir(ffff8000246780b0) at ufs_mkdir+0x65e sys/ufs/ufs/ufs_vnops.c:1232 VOP_MKDIR(fffffd806869c308,ffff800024678210,ffff800024678240,ffff800024678140) at VOP_MKDIR+0xbf sys/kern/vfs_vops.c:404 domkdirat(ffff8000fffef7a0,ffffff9c,7f7fffff40c0,1ff) at domkdirat+0x121 sys/kern/vfs_syscalls.c:3065 end trace frame: 0xffff8000246783b0, count: 0 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 __mp_lock(ffffffff828b6eb0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828b6eb0) at __mp_lock+0x122 sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff828b6eb0,1) at __mp_acquire_count+0x4c sys/kern/kern_lock.c:227 mi_switch() at mi_switch+0x3d3 sys/kern/sched_bsd.c:416 sleep_finish(ffff800024677d80,1) at sleep_finish+0x1b2 sys/kern/kern_synch.c:433 tsleep(fffffd8069918150,11,ffffffff824c291d,0) at tsleep+0x125 sys/kern/kern_synch.c:158 biowait(fffffd8069918150) at biowait+0x91 sys/kern/vfs_bio.c:1271 bwrite(fffffd8069918150) at bwrite+0x21d sys/kern/vfs_bio.c:772 ffs_update(fffffd8065ee8ee8,1) at ffs_update+0x2b5 sys/ufs/ffs/ffs_inode.c:113 ufs_mkdir(ffff8000246780b0) at ufs_mkdir+0x65e sys/ufs/ufs/ufs_vnops.c:1232 VOP_MKDIR(fffffd806869c308,ffff800024678210,ffff800024678240,ffff800024678140) at VOP_MKDIR+0xbf sys/kern/vfs_vops.c:404 domkdirat(ffff8000fffef7a0,ffffff9c,7f7fffff40c0,1ff) at domkdirat+0x121 sys/kern/vfs_syscalls.c:3065 syscall(ffff8000246783c0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000246783c0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff4130, count: -16