uvm_fault(0xfffff7806fbb47a8, 0x798e265b, 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 *450086 7604 0 0 0 0 syz-executor amap_lookups(fffff78069197700,1000,ffff80003778ba60,8) at amap_lookups+0x1e0 amap_chunk_get sys/uvm/uvm_amap.c:118 [inline] amap_lookups(fffff78069197700,1000,ffff80003778ba60,8) at amap_lookups+0x1e0 sys/uvm/uvm_amap.c:1168 uvm_fault_check(ffff80003778bb60,ffff80003778bb98,ffff80003778bbd0,0) at uvm_fault_check+0x8d2 sys/uvm/uvm_fault.c:840 uvm_fault(fffff7806fbb47a8,a8753d13000,0,1) at uvm_fault+0x106 sys/uvm/uvm_fault.c:627 upageflttrap(ffff80003778bd00,a8753d13f50) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003778bd00) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x78b757ccc710, 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(0xfffff7806fbb47a8, 0x798e265b, 0, 1) -> e ddb{0}> show kasan No such command ddb{0}> trace amap_lookups(fffff78069197700,1000,ffff80003778ba60,8) at amap_lookups+0x1e0 amap_chunk_get sys/uvm/uvm_amap.c:118 [inline] amap_lookups(fffff78069197700,1000,ffff80003778ba60,8) at amap_lookups+0x1e0 sys/uvm/uvm_amap.c:1168 uvm_fault_check(ffff80003778bb60,ffff80003778bb98,ffff80003778bbd0,0) at uvm_fault_check+0x8d2 sys/uvm/uvm_fault.c:840 uvm_fault(fffff7806fbb47a8,a8753d13000,0,1) at uvm_fault+0x106 sys/uvm/uvm_fault.c:627 upageflttrap(ffff80003778bd00,a8753d13f50) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003778bd00) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x78b757ccc710, count: -6 ddb{0}> show registers rdi 0x11 rsi 0x20 rbp 0xffff80003778b9b0 rbx 0 rdx 0 rcx 0 rax 0xffff800000c43840 r8 0xffffffff812a2360 uvm_map_inentry_sp r9 0 r10 0 r11 0x9ecaec675c5c446c r12 0x9 r13 0 r14 0x20 r15 0x798e264b rip 0xffffffff8118a9f0 amap_lookups+0x1e0 cs 0x8 rflags 0x10206 __ALIGN_SIZE+0xf206 rsp 0xffff80003778b920 ss 0 amap_lookups+0x1e0: movl 0x10(%r15),%r14d ddb{0}> show proc PROC (syz-executor) tid=450086 pid=7604 tcnt=1 stat=onproc flags process=0 proc=0 runpri=80, usrpri=81, slppri=16, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a223238,0xffff800045fef780 process=0xffff80002a37eb68 user=0xffff800037786000, vmspace=0xfffff7806fbb47a8 estcpu=31, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND 4238 135206 58349 0 4 0x2000 0x80000 syz-executor 4238 156453 58349 0 2 0x2000 0x4080000 syz-executor 4238 172225 58349 0 3 0x2000 0x4080000 inode syz-executor 4238 173905 58349 0 3 0x2000 0x4000000 suspend syz-executor * 7604 450086 21577 0 7 0 0 syz-executor 7038 309559 83997 0 2 0x2 0 syz-executor 90927 274139 1 0 3 0x100003 0x80 ttyin getty 70680 216262 83997 0 3 0x2 0x80 piperd syz-executor 33299 418476 83997 0 3 0x2 0x80 piperd syz-executor 59980 182793 83997 0 3 0x2 0x80 piperd syz-executor 7776 196553 83997 0 3 0x2 0x80 piperd syz-executor 42939 216792 83997 0 3 0x2 0x80 piperd syz-executor 58349 31112 83997 0 3 0x2 0x80 nanoslp syz-executor 21577 462752 83997 0 3 0x2 0x80 nanoslp syz-executor 83997 392377 86827 0 2 0x2 0 syz-executor 86827 425289 62973 0 3 0x100002 0x88 sigsusp ksh 62973 16446 15522 0 3 0x10 0x88 kqread sshd-session 15522 267200 90455 0 3 0x12 0x80 kqread sshd-session 90455 488957 1 0 3 0 0x88 kqread sshd 99997 476456 85175 74 3 0x1100012 0x80 bpf pflogd 85175 287764 1 0 3 0 0x80 sbwait pflogd 41553 382460 32001 73 3 0x1100010 0x80 kqread syslogd 32001 445154 1 0 3 0x100002 0x80 sbwait syslogd 30235 208353 1 0 3 0x100000 0x80 kqread resolvd 87826 104972 83584 77 3 0x100012 0x80 kqread dhcpleased 39314 184575 83584 77 3 0x100012 0x80 kqread dhcpleased 83584 355594 1 0 3 0 0x80 kqread dhcpleased 49592 32841 0 0 3 0x14000 0x200 bored smr 47390 121074 0 0 2 0x14000 0x200 zerothread 78338 282689 0 0 3 0x14000 0x200 aiodoned aiodoned 23069 145294 0 0 3 0x14000 0x200 syncer update 75220 304514 0 0 3 0x14000 0x200 cleaner cleaner 68804 254597 0 0 3 0x14000 0x200 reaper reaper 52367 238587 0 0 3 0x14000 0x200 pgdaemon pagedaemon 47750 387886 0 0 3 0x14000 0x200 bored viomb 75611 361012 0 0 3 0x14000 0x40000200 acpi0 acpi0 24778 460092 0 0 7 0x14000 0x40000200 idle1 32734 446797 0 0 3 0x14000 0x200 bored softnet1 83772 271077 0 0 3 0x14000 0x200 bored softnet0 44845 197561 0 0 3 0x14000 0x200 bored systqmp 37217 48280 0 0 3 0x14000 0x200 bored systq 97569 383802 0 0 3 0x14000 0x200 tmoslp softclockmp 58918 474949 0 0 3 0x14000 0x40000200 tmoslp softclock 82017 276993 0 0 3 0x14000 0x40000200 idle0 1 511377 0 0 3 0x2 0x80 wait init 0 0 -1 0 3 0x10000 0x200 scheduler swapper ddb{0}> show all locks Process 4238 (syz-executor) thread 0xffff800045fef240 (156453) exclusive rrwlock inode r = 0 (0xfffff78069f71ec0) #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_makeinode+0xcd sys/ufs/ufs/ufs_vnops.c:1759 #8 ufs_create+0x4e sys/ufs/ufs/ufs_vnops.c:147 #9 VOP_CREATE+0xfe sys/kern/vfs_vops.c:103 #10 uipc_bind+0x44f sys/kern/uipc_usrreq.c:393 #11 sys_bind+0x2f6 sys/kern/uipc_syscalls.c:190 #12 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #12 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #13 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffff7806e0ff548) #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 uipc_bind+0x328 sys/kern/uipc_usrreq.c:371 #8 sys_bind+0x2f6 sys/kern/uipc_syscalls.c:190 #9 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #10 Xsyscall+0x128 Process 7604 (syz-executor) thread 0xffff800045ffc538 (450086) shared rwlock amaplk r = 0 (0xfffff78075d04160) #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 (0xfffff7806fbb48a8) #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 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11095 12105K 12426K 166960K 12977 0 pcb 17 16K 17K 166960K 243 0 rtable 171 7K 9K 166960K 1063 0 pf 42 19K 26K 166960K 214 0 ifaddr 34 5K 8K 166960K 165 0 ifgroup 51 2K 3K 166960K 220 0 sysctl 3 1K 9K 166960K 9 0 counters 68 36K 38K 166960K 184 0 ioctlops 0 0K 4K 166960K 1762 0 iov 0 0K 32K 166960K 56 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1408 89K 89K 166960K 2362 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 23 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 41 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1734 201K 291K 166960K 11964 0 file desc 12 41K 85K 166960K 1081 0 sigio 0 0K 0K 166960K 4 0 proc 72 115K 164K 166960K 1213 0 subproc 68 4K 4K 166960K 266 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 51 0 in_multi 70 5K 7K 166960K 358 0 ether_multi 1 0K 0K 166960K 3 0 mrt 0 0K 0K 166960K 25 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 253 1129K 1129K 166960K 253 0 exec 0 0K 1K 166960K 747 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 185 158K 173K 166960K 10313 0 UVM aobj 94 3K 3K 166960K 98 0 pinsyscall 37 74K 101K 166960K 2787 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 31 0 NDP 11 0K 1K 166960K 116 0 temp 53 9121K 9184K 166960K 40193 0 kqueue 13 20K 29K 166960K 155 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 1 0 1 1 0 8 0 rtentry 176 358 0 288 6 0 6 6 0 8 1 unpcb 144 330 0 311 1 0 1 1 0 8 0 syncache 336 10 0 10 4 3 1 1 0 8 1 tcpcb 736 251 0 247 8 7 1 4 0 8 0 arp 136 61 0 49 1 0 1 1 0 8 0 inpcb 328 887 0 880 16 14 2 7 0 8 1 nd6 152 92 0 74 2 0 2 2 0 8 0 pkpcb 40 4 0 4 1 1 0 1 0 8 0 kcovpl 48 29 0 22 1 0 1 1 0 8 0 ppxss 1192 25 0 25 3 2 1 1 0 8 1 pppxif 1576 3 0 3 2 2 0 1 0 8 0 pfstscr 40 23 0 22 2 1 1 1 0 8 0 pffrag 232 9 0 3 1 0 1 1 0 482 0 pffrnode 88 9 0 3 1 0 1 1 0 8 0 pffrent 40 14 0 8 1 0 1 1 0 8 0 pfosfp 40 1428 0 1428 5 5 0 5 0 8 0 pfosfpen 112 1428 0 1428 21 21 0 21 0 8 0 pfrktable 1344 1 0 0 1 0 1 1 0 8 0 pfsrclim 320 2 0 1 1 0 1 1 0 8 0 pfanchor 1288 6 0 2 1 0 1 1 0 8 0 pftag 88 2 0 0 1 0 1 1 0 8 0 pfstitem 24 77 0 30 1 0 1 1 0 8 0 pfstkey 128 95 0 48 2 0 2 2 0 8 0 pfstate 448 85 0 40 6 0 6 6 0 8 0 pfrule 1360 24 0 18 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 1503 0 1170 30 3 27 30 0 8 1 art_table 40 1504 0 1170 5 0 5 5 0 8 0 art_node 32 356 0 293 1 0 1 1 0 8 0 sysvmsgpl 40 9 0 7 2 1 1 1 0 8 0 semupl 112 2 0 2 2 2 0 1 0 8 0 semapl 72 36 0 26 1 0 1 1 0 8 0 shmpl 112 95 0 4 3 0 3 3 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 2882 0 1375 95 0 95 95 0 8 0 ffsino 296 2882 0 1375 117 0 117 117 0 8 0 nchpl 144 3978 0 2217 66 0 66 66 0 8 0 rtmask 32 4 0 4 2 2 0 1 0 8 0 vnodes 216 3625 0 0 202 0 202 202 0 8 0 namei 1024 15500 0 15498 2 1 1 1 0 8 0 percpumem 16 108 0 58 1 0 1 1 0 8 0 kstatmem 264 121 0 94 3 0 3 3 0 8 0 scsiplug 72 5 0 5 3 2 1 1 0 8 1 scxspl 216 13876 0 13876 11 10 1 8 1 8 1 plimitpl 152 155 0 137 1 0 1 1 0 8 0 sigapl 424 1355 0 1313 6 0 6 6 0 8 0 knotepl 120 491 0 0 15 0 15 15 0 8 0 kqueuepl 224 246 0 237 1 0 1 1 0 8 0 pipepl 344 222 0 195 3 0 3 3 0 8 0 fdescpl 528 1339 0 1313 3 0 3 3 0 8 0 filepl 160 6853 0 6646 19 5 14 14 0 8 3 lockfpl 104 310 0 308 1 0 1 1 0 8 0 lockfspl 48 134 0 132 1 0 1 1 0 8 0 sessionpl 144 203 0 194 1 0 1 1 0 8 0 pgrppl 48 275 0 258 1 0 1 1 0 8 0 ucredpl 104 1348 0 1334 1 0 1 1 0 8 0 zombiepl 144 1313 0 1313 1 0 1 1 0 8 1 processpl 1232 1355 0 1313 5 1 4 5 0 8 0 procpl 664 2367 0 2322 8 2 6 6 0 8 2 sosppl 176 7 0 7 2 2 0 1 0 8 0 sockpl 752 1439 0 1410 22 17 5 11 0 8 2 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl9k128 9344 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 116 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 28 0 0 4 0 4 4 0 8 0 mextrefs 64 30 0 0 1 0 1 1 0 8 0 mtagpl 96 5 0 0 1 0 1 1 0 8 0 mbufpl 256 369 0 0 24 0 24 24 0 8 0 bufpl 272 4467 0 108 291 0 291 291 0 8 0 anonpl 32 7741 0 0 63 0 63 63 0 247 0 amapchunkpl 152 32665 0 32344 50 27 23 35 0 158 5 amappl16 200 2955 0 2929 36 25 11 15 0 8 8 amappl15 192 14 0 14 1 1 0 1 0 8 0 amappl14 184 682 0 681 1 0 1 1 0 8 0 amappl13 176 167 0 155 1 0 1 1 0 8 0 amappl12 168 1678 0 1653 2 0 2 2 0 8 0 amappl11 160 9 0 9 1 1 0 1 0 8 0 amappl10 152 79 0 65 1 0 1 1 0 8 0 amappl9 144 275 0 275 1 1 0 1 0 8 0 amappl8 136 183 0 180 1 0 1 1 0 8 0 amappl7 128 214 0 200 1 0 1 1 0 8 0 amappl6 120 370 0 369 1 0 1 1 0 8 0 amappl5 112 97 0 86 1 0 1 1 0 8 0 amappl4 104 360 0 340 1 0 1 1 0 8 0 amappl3 96 6581 0 6502 5 1 4 4 0 8 1 amappl2 88 731 0 668 2 0 2 2 0 8 0 amappl1 80 15700 0 15119 14 1 13 14 0 8 0 amappl 88 9124 0 9010 5 1 4 5 0 92 1 uvmvnodes 80 123 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 128 255 0 255 3 3 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 97 0 4 2 0 2 2 0 8 0 uaddrrnd 24 1339 0 1313 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1339 0 1313 1 0 1 1 0 8 0 vmmpekpl 168 11973 0 11930 3 0 3 3 0 8 0 vmmpepl 168 91404 0 89770 109 15 94 99 0 357 10 vmsppl 488 1338 0 1313 6 1 5 5 0 8 0 rwobjpl 80 26718 0 25621 35 6 29 30 0 8 3 pdppl 4096 2685 0 2626 115 42 73 81 0 8 14 pvpl 32 15054 0 0 122 0 122 122 0 265 0 pmappl 256 1338 0 1313 3 0 3 3 0 8 0 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 112 609 0 59 16 0 16 16 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace amap_lookups(fffff78069197700,1000,ffff80003778ba60,8) at amap_lookups+0x1e0 amap_chunk_get sys/uvm/uvm_amap.c:118 [inline] amap_lookups(fffff78069197700,1000,ffff80003778ba60,8) at amap_lookups+0x1e0 sys/uvm/uvm_amap.c:1168 uvm_fault_check(ffff80003778bb60,ffff80003778bb98,ffff80003778bbd0,0) at uvm_fault_check+0x8d2 sys/uvm/uvm_fault.c:840 uvm_fault(fffff7806fbb47a8,a8753d13000,0,1) at uvm_fault+0x106 sys/uvm/uvm_fault.c:627 upageflttrap(ffff80003778bd00,a8753d13f50) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003778bd00) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x78b757ccc710, 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 acpicpu_idle() at acpicpu_idle+0x457 sys/dev/acpi/acpicpu_x86.c:1224 sched_idle(ffff80002999dff0) at sched_idle+0x371 sys/kern/kern_sched.c:192 end trace frame: 0x0, count: 10 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 acpicpu_idle() at acpicpu_idle+0x457 sys/dev/acpi/acpicpu_x86.c:1224 sched_idle(ffff80002999dff0) at sched_idle+0x371 sys/kern/kern_sched.c:192 end trace frame: 0x0, count: -5