uvm_fault(0xfffff7006ce905e8, 0x1000001ef, 0, 1) -> e kernel: page fault trap, code=0 Stopped at amap_lookups+0x1e0: movl 0x10(%r15),%r14d TID PID UID PRFLAGS PFLAGS CPU COMMAND * 80573 15528 32767 0x10 0 0 syz-executor 362207 74362 32767 0x10000010 0 1 syz-executor amap_lookups(fffff7006cfddf58,c000,ffff80002a2afd40,8) at amap_lookups+0x1e0 amap_chunk_get sys/uvm/uvm_amap.c:118 [inline] amap_lookups(fffff7006cfddf58,c000,ffff80002a2afd40,8) at amap_lookups+0x1e0 sys/uvm/uvm_amap.c:1168 uvm_fault_check(ffff80002a2afe40,ffff80002a2afe78,ffff80002a2afeb0,0) at uvm_fault_check+0x8d2 sys/uvm/uvm_fault.c:840 uvm_fault(fffff7006ce905e8,bba1eb94000,0,1) at uvm_fault+0x106 sys/uvm/uvm_fault.c:627 upageflttrap(ffff80002a2affe0,bba1eb94280) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80002a2affe0) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x72b3b7114ef0, 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(0xfffff7006ce905e8, 0x1000001ef, 0, 1) -> e ddb{0}> show kasan No such command ddb{0}> trace amap_lookups(fffff7006cfddf58,c000,ffff80002a2afd40,8) at amap_lookups+0x1e0 amap_chunk_get sys/uvm/uvm_amap.c:118 [inline] amap_lookups(fffff7006cfddf58,c000,ffff80002a2afd40,8) at amap_lookups+0x1e0 sys/uvm/uvm_amap.c:1168 uvm_fault_check(ffff80002a2afe40,ffff80002a2afe78,ffff80002a2afeb0,0) at uvm_fault_check+0x8d2 sys/uvm/uvm_fault.c:840 uvm_fault(fffff7006ce905e8,bba1eb94000,0,1) at uvm_fault+0x106 sys/uvm/uvm_fault.c:627 upageflttrap(ffff80002a2affe0,bba1eb94280) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80002a2affe0) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x72b3b7114ef0, count: -6 ddb{0}> show registers rdi 0x11 rsi 0x20 rbp 0xffff80002a2afc90 rbx 0 rdx 0 rcx 0 rax 0xffff800000c43e60 r8 0xffffffff811e02f0 uvm_map_inentry_sp r9 0 r10 0 r11 0x5c49b0b943decbcb r12 0x14 r13 0 r14 0x20 r15 0x1000001df rip 0xffffffff81101950 amap_lookups+0x1e0 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80002a2afc00 ss 0 amap_lookups+0x1e0: movl 0x10(%r15),%r14d ddb{0}> show proc PROC (syz-executor) tid=80573 pid=15528 tcnt=2 stat=onproc flags process=10 proc=0 runpri=72, usrpri=73, slppri=16, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c3dd788,0xffff800045fe62c8 process=0xffff80003abce6a0 user=0xffff80002a2ab000, vmspace=0xfffff7006ce905e8 estcpu=23, cpticks=3, pctcpu=0.0, user=1, sys=2, intr=0 ddb{0}> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND 26363 233896 86521 32767 3 0x10 0x80 nanoslp syz-executor 26363 60577 86521 32767 3 0x10 0x4000080 fsleep syz-executor 26363 493190 86521 32767 3 0x10 0x4000080 fsleep syz-executor 51664 360560 2544 32767 2 0x10 0 syz-executor *15528 80573 94041 32767 7 0x10 0 syz-executor 15528 63426 94041 32767 3 0x10 0x4000080 fsleep syz-executor 96682 279784 98465 32767 3 0x1010 0x2000 suspend syz-executor 96682 143365 98465 32767 2 0x1010 0x4080080 syz-executor 94041 251480 3557 32767 3 0x10 0x80 nanoslp syz-executor 3557 503956 71849 0 3 0x2 0x80 wait syz-executor 74548 18182 29206 32767 3 0x10 0x80 nanoslp syz-executor 86521 445470 81575 32767 3 0x10 0x80 nanoslp syz-executor 78664 328173 30000 32767 3 0x10 0 biowait syz-executor 2544 76551 93149 32767 3 0x10 0x80 nanoslp syz-executor 98465 418957 84073 32767 3 0x10 0x80 nanoslp syz-executor 74362 362207 7740 32767 7 0x10000010 0 syz-executor 29206 188456 71849 0 3 0x2 0x80 wait syz-executor 81575 340198 71849 0 3 0x2 0x80 wait syz-executor 93149 42069 71849 0 3 0x2 0x80 wait syz-executor 7740 488406 71849 0 3 0x2 0x80 wait syz-executor 30000 86771 71849 0 3 0x2 0x80 wait syz-executor 84073 78659 71849 0 3 0x2 0x80 wait syz-executor 71849 264362 16670 0 3 0x2 0x80 nanoslp syz-executor 16670 277437 64842 0 3 0x100002 0x88 sigsusp ksh 64842 199917 28839 0 3 0x10 0x88 kqread sshd-session 28839 132335 40285 0 3 0x12 0x80 kqread sshd-session 37234 283422 1 0 3 0x100003 0x80 ttyin getty 40285 97191 1 0 3 0 0x88 kqread sshd 11432 445582 79423 73 3 0x1100010 0x80 kqread syslogd 79423 225980 1 0 3 0x100002 0x80 sbwait syslogd 29896 145736 1 0 3 0x100000 0x80 kqread resolvd 31589 317477 43340 77 3 0x100012 0x80 kqread dhcpleased 75341 310470 43340 77 3 0x100012 0x80 kqread dhcpleased 43340 466261 1 0 3 0 0x80 kqread dhcpleased 90775 249942 0 0 3 0x14000 0x200 bored smr 13044 463179 0 0 2 0x14000 0x200 zerothread 37215 105360 0 0 3 0x14000 0x200 aiodoned aiodoned 33776 130111 0 0 3 0x14000 0x200 syncer update 40770 95176 0 0 3 0x14000 0x200 cleaner cleaner 38679 24457 0 0 2 0x14000 0x200 reaper 65121 488856 0 0 3 0x14000 0x200 pgdaemon pagedaemon 14230 70193 0 0 3 0x14000 0x200 bored viomb 44964 409426 0 0 3 0x14000 0x40000200 acpi0 acpi0 76288 132234 0 0 3 0x14000 0x40000200 idle1 83997 287373 0 0 3 0x14000 0x200 bored softnet1 33678 484749 0 0 3 0x14000 0x200 bored softnet0 29515 306590 0 0 3 0x14000 0x200 bored systqmp 639 108612 0 0 3 0x14000 0x200 bored systq 45851 180665 0 0 2 0x14000 0x200 softclockmp 86982 407956 0 0 3 0x14000 0x40000200 tmoslp softclock 15971 233808 0 0 3 0x14000 0x40000200 idle0 1 413565 0 0 3 0x2 0x80 wait init 0 0 -1 0 3 0x10000 0x200 scheduler swapper ddb{0}> show all locks Process 15528 (syz-executor) thread 0xffff80003c3dc560 (80573) shared rwlock amaplk r = 0 (0xfffff7006ce8d340) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 uvm_fault_check+0x8a9 sys/uvm/uvm_fault.c:834 #3 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #4 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #5 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 #6 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffff7006ce906e8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1880 #3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 #7 recall_trap+0x8 Process 78664 (syz-executor) thread 0xffff800045fe7ca8 (328173) exclusive rrwlock inode r = 0 (0xfffff7007d368eb0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline] #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:150 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1232 #6 ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3063 #10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffff7006dac08c8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576 #5 vfs_lookup+0x12b sys/kern/vfs_lookup.c:431 #6 namei+0x7c5 sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3048 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11052 12016K 12034K 166960K 12149 0 pcb 17 12K 12K 166960K 17 0 rtable 219 6K 7K 166960K 404 0 pf 29 16K 16K 166960K 33 0 ifaddr 38 6K 7K 166960K 48 0 ifgroup 46 2K 2K 166960K 54 0 sysctl 1 1K 9K 166960K 6 0 counters 68 36K 37K 166960K 72 0 ioctlops 0 0K 4K 166960K 40 0 iov 0 0K 8K 166960K 14 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1289 81K 81K 166960K 1503 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 6 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 19 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1734 201K 291K 166960K 11964 0 file desc 20 73K 117K 166960K 448 0 sigio 0 0K 0K 166960K 7 0 proc 58 99K 147K 166960K 545 0 subproc 63 3K 4K 166960K 198 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 39 0 in_multi 88 6K 7K 166960K 112 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 16 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 91 413K 413K 166960K 91 0 exec 0 0K 1K 166960K 421 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 210 158K 188K 166960K 5453 0 UVM aobj 7 2K 2K 166960K 7 0 pinsyscall 41 82K 108K 166960K 1607 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 16 0 NDP 10 0K 2K 166960K 30 0 temp 36 9119K 9134K 166960K 4651 0 kqueue 13 20K 28K 166960K 79 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 28 0 0 1 0 1 1 0 8 0 rtpcb 120 125 0 122 3 0 3 3 0 8 2 rtentry 176 127 0 26 6 0 6 6 0 8 0 unpcb 144 197 0 180 1 0 1 1 0 8 0 syncache 336 9 0 9 1 0 1 1 0 8 1 tcpcb 736 145 0 141 4 2 2 4 0 8 1 arp 136 20 0 4 1 0 1 1 0 8 0 ipq 40 2 0 0 1 0 1 1 0 8 0 ipqe 40 3 0 0 1 0 1 1 0 8 0 inpcb 328 518 0 509 12 3 9 12 0 8 8 ip6q 72 2 0 0 1 0 1 1 0 8 0 ip6af 40 2 0 0 1 0 1 1 0 8 0 nd6 152 32 0 9 2 0 2 2 0 8 0 kcovpl 48 22 0 15 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 532 0 120 30 0 30 30 0 8 0 art_table 40 533 0 120 5 0 5 5 0 8 0 art_node 32 127 0 35 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 1 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 72 17 0 7 1 0 1 1 0 8 0 shmpl 112 4 0 0 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 1913 0 427 93 0 93 93 0 8 0 ffsino 296 1913 0 427 115 0 115 115 0 8 0 nchpl 144 2464 0 751 64 0 64 64 0 8 0 vnodes 216 2120 0 0 118 0 118 118 0 8 0 namei 1024 7837 0 7836 1 0 1 1 0 8 0 percpumem 16 52 0 2 1 0 1 1 0 8 0 kstatmem 264 27 0 4 2 0 2 2 0 8 0 scxspl 216 8225 0 8224 4 3 1 3 1 8 0 plimitpl 152 92 0 69 2 0 2 2 0 8 0 sigapl 424 726 0 676 7 0 7 7 0 8 0 knotepl 120 317 0 0 10 0 10 10 0 8 0 kqueuepl 224 96 0 86 1 0 1 1 0 8 0 pipepl 344 197 0 169 3 0 3 3 0 8 0 fdescpl 528 710 0 678 3 0 3 3 0 8 0 filepl 160 3452 0 3252 15 0 15 15 0 8 5 lockfpl 104 76 0 74 1 0 1 1 0 8 0 lockfspl 48 29 0 27 1 0 1 1 0 8 0 sessionpl 144 53 0 38 1 0 1 1 0 8 0 pgrppl 48 77 0 55 1 0 1 1 0 8 0 ucredpl 104 443 0 425 1 0 1 1 0 8 0 zombiepl 144 678 0 676 1 0 1 1 0 8 0 processpl 1232 726 0 676 5 0 5 5 0 8 0 procpl 664 1117 0 1063 7 1 6 7 0 8 0 sosppl 176 2 0 2 1 1 0 1 0 8 0 sockpl 752 841 0 812 17 6 11 17 0 8 7 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 120 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 19 0 0 3 0 3 3 0 8 0 mextrefs 64 16 0 0 1 0 1 1 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 363 0 0 23 0 23 23 0 8 0 bufpl 272 2745 0 102 177 0 177 177 0 8 0 anonpl 32 7269 0 0 59 0 59 59 0 247 0 amapchunkpl 152 16993 0 16565 33 0 33 33 0 158 11 amappl16 200 2305 0 2286 16 5 11 14 0 8 8 amappl15 192 7 0 7 1 1 0 1 0 8 0 amappl14 184 523 0 522 1 0 1 1 0 8 0 amappl13 176 136 0 126 1 0 1 1 0 8 0 amappl12 168 952 0 921 2 0 2 2 0 8 0 amappl11 160 6 0 6 2 2 0 1 0 8 0 amappl10 152 64 0 54 1 0 1 1 0 8 0 amappl9 144 272 0 272 1 1 0 1 0 8 0 amappl8 136 144 0 143 1 0 1 1 0 8 0 amappl7 128 145 0 134 1 0 1 1 0 8 0 amappl6 120 162 0 158 1 0 1 1 0 8 0 amappl5 112 116 0 109 1 0 1 1 0 8 0 amappl4 104 277 0 260 1 0 1 1 0 8 0 amappl3 96 3167 0 3063 5 1 4 4 0 8 0 amappl2 88 583 0 529 2 0 2 2 0 8 0 amappl1 80 12597 0 12038 16 1 15 16 0 8 1 amappl 88 4656 0 4508 5 0 5 5 0 92 0 uvmvnodes 80 103 0 0 3 0 3 3 0 8 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 6 0 0 1 0 1 1 0 8 0 uaddrrnd 24 710 0 678 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 710 0 678 1 0 1 1 0 8 0 vmmpekpl 168 8037 0 7990 3 0 3 3 0 8 0 vmmpepl 168 55320 0 53523 101 1 100 101 0 357 9 vmsppl 488 709 0 677 7 1 6 6 0 8 0 rwobjpl 80 18596 0 17696 25 0 25 25 0 8 2 pdppl 4096 1427 0 1354 125 46 79 93 0 8 6 pvpl 32 15462 0 0 125 0 125 125 0 265 0 pmappl 256 709 0 677 4 1 3 3 0 8 0 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 112 486 0 51 13 0 13 13 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace amap_lookups(fffff7006cfddf58,c000,ffff80002a2afd40,8) at amap_lookups+0x1e0 amap_chunk_get sys/uvm/uvm_amap.c:118 [inline] amap_lookups(fffff7006cfddf58,c000,ffff80002a2afd40,8) at amap_lookups+0x1e0 sys/uvm/uvm_amap.c:1168 uvm_fault_check(ffff80002a2afe40,ffff80002a2afe78,ffff80002a2afeb0,0) at uvm_fault_check+0x8d2 sys/uvm/uvm_fault.c:840 uvm_fault(fffff7006ce905e8,bba1eb94000,0,1) at uvm_fault+0x106 sys/uvm/uvm_fault.c:627 upageflttrap(ffff80002a2affe0,bba1eb94280) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80002a2affe0) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x72b3b7114ef0, count: -6 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff80002999dff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff83a64880) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83a64880) at __mp_lock+0x199 sys/kern/kern_lock.c:173 syscall(ffff80002ef7c2e0) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] syscall(ffff80002ef7c2e0) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78bdc9ed0780, count: 9 ddb{1}> trace x86_ipi_db(ffff80002999dff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff83a64880) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83a64880) at __mp_lock+0x199 sys/kern/kern_lock.c:173 syscall(ffff80002ef7c2e0) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] syscall(ffff80002ef7c2e0) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78bdc9ed0780, count: -6