uvm_fault(0xffffffff83aba540, 0xffff80001a9721a0, 0, 1) -> d kernel: page fault trap, code=0 Stopped at ffs2_balloc+0xa0d: movq 0(%rcx,%rax,8),%r14 TID PID UID PRFLAGS PFLAGS CPU COMMAND 360445 81471 0 0 0 1 syz-executor ffs2_balloc(fffffd8068eae3a0,101400,40,fffffd80097fd478,1,ffff80003c41d628) at ffs2_balloc+0xa0d sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80003c41d6b0) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd807b5c87a0,ffff80003c41d748,23,fffffd80097fd478) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 vn_rdwr(1,fffffd807b5c87a0,ffff80003c41d880,40,0,1,f146269eb9d029b7,0,1008,0) at vn_rdwr+0x12d sys/kern/vfs_vnops.c:330 acct_process(ffff80002a2434f0) at acct_process+0x7a2 sys/kern/kern_acct.c:245 exit1(ffff80002a2434f0,b,0,1) at exit1+0x5c4 sys/kern/kern_exit.c:228 sys_exit(ffff80002a2434f0,ffff80003c41dac0,ffff80003c41da10) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c41dac0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c41dac0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a6031938e60, 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(0xffffffff83aba540, 0xffff80001a9721a0, 0, 1) -> d ddb{0}> trace ffs2_balloc(fffffd8068eae3a0,101400,40,fffffd80097fd478,1,ffff80003c41d628) at ffs2_balloc+0xa0d sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80003c41d6b0) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd807b5c87a0,ffff80003c41d748,23,fffffd80097fd478) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 vn_rdwr(1,fffffd807b5c87a0,ffff80003c41d880,40,0,1,f146269eb9d029b7,0,1008,0) at vn_rdwr+0x12d sys/kern/vfs_vnops.c:330 acct_process(ffff80002a2434f0) at acct_process+0x7a2 sys/kern/kern_acct.c:245 exit1(ffff80002a2434f0,b,0,1) at exit1+0x5c4 sys/kern/kern_exit.c:228 sys_exit(ffff80002a2434f0,ffff80003c41dac0,ffff80003c41da10) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c41dac0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c41dac0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a6031938e60, count: -9 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80003c41d5d0 rbx 0 rdx 0 rcx 0xffff80001a972000 rax 0x34 r8 0xffffffffffffffff r9 0xffff80003c41d628 r10 0x378a1170f3c0b9f9 r11 0x78fa2491d62f550b r12 0x1 r13 0xffff800000c31800 r14 0xffff80003c41d460 r15 0xfffffd805d2587b0 rip 0xffffffff8193c68d ffs2_balloc+0xa0d cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80003c41d450 ss 0x10 ffs2_balloc+0xa0d: movq 0(%rcx,%rax,8),%r14 ddb{0}> show proc PROC (syz-executor) tid=38988 pid=78260 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80002a2434f0 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80002a242a90,0xffffffff839e2ce0 process=0xffff8000fffedcf8 user=0xffff80003c418000, vmspace=0xfffffd806e85e5c8 estcpu=36, cpticks=3, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 30057 160425 29253 0 2 0 syz-executor 30057 308032 29253 0 3 0x4000080 fsleep syz-executor 33674 226604 19199 0 2 0 syz-executor 33674 462270 19199 0 2 0x4000000 syz-executor 81471 360445 29363 0 7 0 syz-executor 81471 392343 29363 0 3 0x4000080 fsleep syz-executor 81471 513398 29363 0 3 0x4000080 fsleep syz-executor 76447 324728 86413 0 3 0x90 nanoslp syz-executor 76447 479576 86413 0 3 0x4000090 kqread syz-executor 76447 79213 86413 0 3 0x4000090 fsleep syz-executor 92614 45951 0 0 3 0x14200 acct acct 99325 11349 89777 0 3 0x82 nanoslp syz-executor 56690 357471 89777 0 3 0x82 wait syz-executor 29363 394935 89777 0 2 0xc82 syz-executor 29253 19309 89777 0 2 0xc82 syz-executor 86413 180705 89777 0 3 0x82 nanoslp syz-executor 77103 225676 89777 0 3 0x82 wait syz-executor 19199 115148 89777 0 2 0xc82 syz-executor 89777 329480 1 0 3 0x82 wait syz-executor 52707 85821 0 0 3 0x14200 bored smr 17366 220090 0 0 2 0x14200 zerothread 92573 511066 0 0 3 0x14200 aiodoned aiodoned 14207 301226 0 0 3 0x14200 syncer update 87541 334429 0 0 3 0x14200 cleaner cleaner 33116 504144 0 0 3 0x14200 reaper reaper 57913 248650 0 0 3 0x14200 pgdaemon pagedaemon 7170 364050 0 0 3 0x14200 bored viomb 97213 501670 0 0 3 0x40014200 acpi0 acpi0 95479 427905 0 0 3 0x40014200 idle1 58734 464344 0 0 3 0x14200 bored softnet1 55193 240690 0 0 3 0x14200 bored softnet0 82371 44059 0 0 3 0x14200 smrbar systqmp 80606 490126 0 0 3 0x14200 bored systq 52344 388696 0 0 3 0x14200 tmoslp softclockmp 75283 29315 0 0 3 0x40014200 tmoslp softclock 54206 407983 0 0 3 0x40014200 idle0 1 444801 0 0 4 0x58000082 init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 81471 (syz-executor) thread 0xffff8000fffe34e8 (360445) exclusive rwlock uobjlk r = 0 (0xfffffd806cfc2428) #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 uvm_fault+0x1e5 sys/uvm/uvm_fault.c:649 #3 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #4 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 #5 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd806923e6d8) #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 82371 (systqmp) thread 0xffff8000ffffe530 (44059) shared rwlock systqmp r = 0 (0xffffffff83991058) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 taskq_thread+0x12a sys/kern/kern_task.c:442 #2 proc_trampoline+0x10 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11063 12271K 12310K 166960K 12500 0 pcb 18 12K 12K 166960K 60 0 rtable 172 6K 7K 166960K 372 0 pf 31 17K 24K 166960K 87 0 ifaddr 31 5K 7K 166960K 55 0 ifgroup 43 2K 2K 166960K 73 0 sysctl 3 1K 9K 166960K 7 0 counters 64 36K 37K 166960K 90 0 ioctlops 0 0K 4K 166960K 1542 0 iov 0 0K 16K 166960K 15 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1318 83K 83K 166960K 1631 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 8 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 20 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 15 57K 93K 166960K 395 0 sigio 0 0K 0K 166960K 68 0 proc 12 17K 164K 166960K 568 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 27 0 in_multi 69 4K 7K 166960K 111 0 ether_multi 1 0K 0K 166960K 3 0 mrt 1 0K 0K 166960K 15 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 103 466K 466K 166960K 103 0 exec 0 0K 1K 166960K 436 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 145 78K 174K 166960K 5486 0 UVM aobj 13 2K 2K 166960K 13 0 pinsyscall 17 34K 106K 166960K 1551 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 37 0 NDP 9 0K 2K 166960K 34 0 temp 39 9110K 9255K 166960K 21056 0 kqueue 2 4K 26K 166960K 72 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 26 0 0 1 0 1 1 0 8 0 rtpcb 120 45 0 45 1 0 1 1 0 8 1 rtentry 176 117 0 42 6 0 6 6 0 8 0 unpcb 144 181 0 178 2 0 2 2 0 8 1 syncache 336 6 0 6 1 0 1 1 0 8 1 tcpcb 736 52 0 51 1 0 1 1 0 8 0 arp 136 18 0 8 1 0 1 1 0 8 0 inpcb 328 244 0 239 2 0 2 2 0 8 1 nd6 152 27 0 10 1 0 1 1 0 8 0 pkpcb 40 4 0 4 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 8 0 8 1 0 1 1 0 8 1 pppxif 1576 1 0 1 1 0 1 1 0 8 1 pfstscr 40 3 0 3 1 0 1 1 0 8 1 pffrag 232 1 0 0 1 0 1 1 0 482 0 pffrnode 88 1 0 0 1 0 1 1 0 8 0 pffrent 40 1 0 0 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfanchor 1288 8 0 0 1 0 1 1 0 8 0 pftag 88 2 0 0 1 0 1 1 0 8 0 pfqueue 320 1 0 0 1 0 1 1 0 8 0 pfstitem 24 45 0 0 1 0 1 1 0 8 0 pfstkey 128 48 0 3 2 0 2 2 0 8 0 pfstate 448 47 0 2 6 0 6 6 0 8 1 pfrule 1360 37 0 32 2 1 1 2 0 8 0 rttmr 136 2 0 2 1 0 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 544 0 161 31 0 31 31 0 8 3 art_table 40 545 0 161 6 0 6 6 0 8 0 art_node 32 117 0 39 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 0 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 72 17 0 7 1 0 1 1 0 8 0 shmpl 112 10 0 0 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 2052 0 575 93 0 93 93 0 8 0 ffsino 296 2053 0 576 114 0 114 114 0 8 0 nchpl 144 2653 0 944 64 0 64 64 0 8 0 rtmask 32 3 0 3 1 0 1 1 0 8 1 vnodes 216 2298 0 0 128 0 128 128 0 8 0 namei 1024 8202 0 8202 4 0 4 4 0 8 4 percpumem 16 60 0 13 1 0 1 1 0 8 0 kstatmem 264 39 0 18 2 0 2 2 0 8 0 scsiplug 72 3 0 3 1 0 1 1 0 8 1 scxspl 216 13812 0 13812 6 1 5 5 1 8 5 plimitpl 152 55 0 37 1 0 1 1 0 8 0 sigapl 424 733 0 685 8 0 8 8 0 8 1 knotepl 120 555 0 0 17 0 17 17 0 8 0 kqueuepl 224 145 0 143 4 0 4 4 0 8 3 pipepl 344 138 0 111 3 0 3 3 0 8 0 fdescpl 528 696 0 679 3 0 3 3 0 8 0 filepl 160 3162 0 2988 13 0 13 13 0 8 3 lockfpl 104 331 0 330 2 0 2 2 0 8 1 lockfspl 48 94 0 93 1 0 1 1 0 8 0 sessionpl 144 33 0 24 1 0 1 1 0 8 0 pgrppl 48 45 0 28 1 0 1 1 0 8 0 ucredpl 104 519 0 498 1 0 1 1 0 8 0 zombiepl 144 702 0 685 1 0 1 1 0 8 0 processpl 1232 733 0 685 6 0 6 6 0 8 1 procpl 664 1154 0 1100 8 0 8 8 0 8 2 sosppl 176 3 0 3 1 0 1 1 0 8 1 sockpl 752 484 0 476 6 0 6 6 0 8 4 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k128 9344 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 126 0 0 16 0 16 16 0 8 0 mcl2k 2048 21 0 0 3 0 3 3 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 176 0 0 11 0 11 11 0 8 0 bufpl 280 6891 0 760 439 0 439 439 0 8 0 anonpl 32 9568 0 0 78 0 78 78 0 246 0 amapchunkpl 152 17775 0 17369 36 0 36 36 0 158 19 amappl16 200 2362 0 2345 8 2 6 6 0 8 3 amappl15 192 31 0 31 1 0 1 1 0 8 1 amappl14 184 430 0 430 1 0 1 1 0 8 1 amappl13 176 131 0 131 1 0 1 1 0 8 1 amappl12 168 941 0 924 2 0 2 2 0 8 0 amappl11 160 7 0 6 1 0 1 1 0 8 0 amappl10 152 70 0 70 1 0 1 1 0 8 1 amappl9 144 273 0 273 1 1 0 1 0 8 0 amappl8 136 103 0 103 1 0 1 1 0 8 1 amappl7 128 160 0 159 1 0 1 1 0 8 0 amappl6 120 156 0 155 1 0 1 1 0 8 0 amappl5 112 123 0 123 1 0 1 1 0 8 1 amappl4 104 298 0 297 1 0 1 1 0 8 0 amappl3 96 3245 0 3158 5 1 4 4 0 8 0 amappl2 88 541 0 534 2 0 2 2 0 8 0 amappl1 80 11492 0 11403 15 0 15 15 0 8 7 amappl 88 4618 0 4485 5 0 5 5 0 92 0 uvmvnodes 80 105 0 0 3 0 3 3 0 8 0 dma16384 16384 1 0 1 1 0 1 1 0 8 1 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 2 1 1 1 0 8 1 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 12 0 0 1 0 1 1 0 8 0 uaddrrnd 24 696 0 678 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 696 0 678 1 0 1 1 0 8 0 vmmpekpl 168 7482 0 7443 3 0 3 3 0 8 0 vmmpepl 168 53312 0 52507 88 0 88 88 0 357 48 vmsppl 488 695 0 678 5 0 5 5 0 8 1 rwobjpl 80 17884 0 17468 24 0 24 24 0 8 2 pdppl 4096 1399 0 1356 97 50 47 85 0 8 4 pvpl 32 15082 0 0 122 0 122 122 0 265 0 pmappl 256 695 0 678 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 279 0 53 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace ffs2_balloc(fffffd8068eae3a0,101400,40,fffffd80097fd478,1,ffff80003c41d628) at ffs2_balloc+0xa0d sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80003c41d6b0) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd807b5c87a0,ffff80003c41d748,23,fffffd80097fd478) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 vn_rdwr(1,fffffd807b5c87a0,ffff80003c41d880,40,0,1,f146269eb9d029b7,0,1008,0) at vn_rdwr+0x12d sys/kern/vfs_vnops.c:330 acct_process(ffff80002a2434f0) at acct_process+0x7a2 sys/kern/kern_acct.c:245 exit1(ffff80002a2434f0,b,0,1) at exit1+0x5c4 sys/kern/kern_exit.c:228 sys_exit(ffff80002a2434f0,ffff80003c41dac0,ffff80003c41da10) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c41dac0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c41dac0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a6031938e60, count: -9 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(ffffffff839e5780) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff839e5780) at __mp_lock+0x192 sys/kern/kern_lock.c:173 uvm_fault(fffffd806923e5d8,bccb2446000,0,1) at uvm_fault+0x1ea sys/uvm/uvm_fault.c:650 upageflttrap(ffff80003abc6540,bccb2446000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003abc6540) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7085c30dc9a0, count: 7 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(ffffffff839e5780) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff839e5780) at __mp_lock+0x192 sys/kern/kern_lock.c:173 uvm_fault(fffffd806923e5d8,bccb2446000,0,1) at uvm_fault+0x1ea sys/uvm/uvm_fault.c:650 upageflttrap(ffff80003abc6540,bccb2446000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003abc6540) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7085c30dc9a0, count: -8 ddb{1}>