kernel: protection fault trap, code=0 Stopped at sys_semop+0x3d5: movzwl 0(%rax),%r15d ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic the kernel did not panic ddb{1}> trace sys_semop(ffff80003c415a18,ffff80003c431560,ffff80003c4314b0) at sys_semop+0x3d5 sys/kern/sysv_sem.c:617 syscall(ffff80003c431560) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c431560) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xbd2a90a1060, count: -3 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c431480 rbx 0xdead4110dead4110 rdx 0 rcx 0xffff80003c415a18 rax 0xdead4110dead4110 r8 0x7f7fffffc000 r9 0x1 r10 0xb9617f19413bb01d r11 0xc6222bf5e4320a53 r12 0 r13 0xfffffd8061c26c40 r14 0xffff80003c431560 r15 0 rip 0xffffffff82d46365 sys_semop+0x3d5 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80003c431390 ss 0x10 sys_semop+0x3d5: movzwl 0(%rax),%r15d ddb{1}> show proc PROC (syz-executor) tid=339641 pid=59074 tcnt=4 stat=onproc flags process=0 proc=4000000 runpri=50, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c4154e8,0xffff80003c414800 process=0xffff80002a3c09b8 user=0xffff80003c42c000, vmspace=0xfffffd806a10a3f8 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 59074 179697 38909 0 7 0 syz-executor *59074 339641 38909 0 7 0x4000000 syz-executor 59074 115589 38909 0 3 0x4000080 fsleep syz-executor 59074 381443 38909 0 2 0x4000000 syz-executor 93667 75728 88831 0 3 0x80 nanoslp syz-executor 93667 85670 88831 0 3 0x4000080 kqread syz-executor 9670 109554 63334 0 3 0x80 fsleep syz-executor 9670 231816 63334 0 3 0x4000080 lockf syz-executor 65326 138532 89429 0 3 0x80 fsleep syz-executor 65326 162213 89429 0 3 0x4000080 kqsel syz-executor 65326 247235 89429 0 3 0x4000080 fsleep syz-executor 65326 16405 89429 0 3 0x4000080 fsleep syz-executor 38909 358872 78649 0 3 0x82 nanoslp syz-executor 12675 258678 94215 0 3 0x80 fsleep syz-executor 12675 371038 94215 0 3 0x4000080 kqread syz-executor 88831 105263 78649 0 3 0x82 nanoslp syz-executor 10067 239808 49891 0 3 0x3000 suspend syz-executor 10067 24399 49891 0 2 0x4081000 syz-executor 10067 372244 49891 0 3 0x4081000 inode syz-executor 5292 366480 78649 0 3 0x82 wait syz-executor 89429 245191 78649 0 3 0x82 nanoslp syz-executor 19365 14174 78649 0 2 0x2 syz-executor 63334 379190 78649 0 3 0x82 nanoslp syz-executor 94215 499514 78649 0 3 0x82 nanoslp syz-executor 49891 440148 78649 0 3 0x82 wait syz-executor 78649 424578 98925 0 3 0x82 kqread syz-executor 98925 407225 38279 0 3 0x10008a sigsusp ksh 38279 388262 37899 0 3 0x98 kqread sshd-session 37899 219168 17470 0 3 0x92 kqread sshd-session 92216 216364 1 0 3 0x100083 ttyin getty 17470 408711 1 0 3 0x88 kqread sshd 16197 474970 320 74 3 0x1100092 bpf pflogd 320 42105 1 0 3 0x80 sbwait pflogd 62906 488032 30787 73 3 0x1100090 kqread syslogd 30787 336137 1 0 3 0x100082 sbwait syslogd 48664 319589 1 0 3 0x100080 kqread resolvd 38392 319216 60646 77 3 0x100092 kqread dhcpleased 37074 177631 60646 77 3 0x100092 kqread dhcpleased 60646 193829 1 0 3 0x80 kqread dhcpleased 58852 510702 0 0 3 0x14200 bored smr 27683 331510 0 0 3 0x14200 pgzero zerothread 35384 46755 0 0 3 0x14200 aiodoned aiodoned 264 452407 0 0 3 0x14200 syncer update 75865 144755 0 0 3 0x14200 cleaner cleaner 96103 513470 0 0 3 0x14200 reaper reaper 45304 127598 0 0 3 0x14200 pgdaemon pagedaemon 3430 311901 0 0 3 0x14200 bored viomb 69242 75888 0 0 3 0x40014200 acpi0 acpi0 91068 58525 0 0 3 0x40014200 idle1 34357 320671 0 0 3 0x14200 bored softnet1 62143 377744 0 0 3 0x14200 bored softnet0 55284 93692 0 0 3 0x14200 bored systqmp 75641 493361 0 0 3 0x14200 bored systq 91958 45538 0 0 3 0x14200 tmoslp softclockmp 64997 246020 0 0 3 0x40014200 tmoslp softclock 83787 298365 0 0 3 0x40014200 idle0 1 100546 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 59074 (syz-executor) thread 0xffff80003c4154e8 (179697) Process 59074 (syz-executor) thread 0xffff80003c415a18 (339641) Process 10067 (syz-executor) thread 0xffff80003a802a90 (24399) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11067 12113K 12234K 166960K 12310 0 pcb 17 12K 12K 166960K 46 0 rtable 241 7K 8K 166960K 435 0 pf 36 17K 18K 166960K 58 0 ifaddr 44 7K 7K 166960K 63 0 ifgroup 59 2K 2K 166960K 82 0 sysctl 1 1K 9K 166960K 9 0 counters 72 37K 37K 166960K 94 0 ioctlops 0 0K 4K 166960K 1502 0 iov 0 0K 16K 166960K 12 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1339 84K 85K 166960K 1482 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 8 0K 0K 166960K 11 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 93K 166960K 308 0 sigio 0 0K 0K 166960K 1 0 proc 72 115K 147K 166960K 601 0 subproc 72 4K 4K 166960K 90 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 99 7K 7K 166960K 124 0 ether_multi 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 73 334K 334K 166960K 73 0 exec 0 0K 1K 166960K 420 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 243 175K 193K 166960K 4575 0 UVM aobj 9 6K 6K 166960K 10 0 pinsyscall 42 84K 104K 166960K 1484 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 6 0 NDP 13 0K 2K 166960K 41 0 temp 46 8672K 8737K 166960K 4965 0 kqueue 14 22K 26K 166960K 54 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> 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 47 0 44 1 0 1 1 0 8 0 rtentry 176 139 0 29 6 0 6 6 0 8 1 unpcb 144 115 0 98 2 1 1 2 0 8 0 syncache 336 4 0 4 1 1 0 1 0 8 0 tcpqe 32 2 0 2 1 0 1 1 0 8 1 tcpcb 736 34 0 28 2 0 2 2 0 8 0 arp 136 23 0 5 1 0 1 1 0 8 0 inpcb 328 188 0 178 3 1 2 3 0 8 1 nd6 152 31 0 7 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 1 0 1 0 8 0 kcovpl 48 10 0 2 1 0 1 1 0 8 0 ppxss 1192 8 0 8 2 1 1 1 0 8 1 pppxif 1504 1 0 1 1 0 1 1 0 8 1 pffrag 232 2 0 0 1 0 1 1 0 482 0 pffrnode 88 2 0 0 1 0 1 1 0 8 0 pffrent 40 7 0 5 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 pfrktable 1344 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 553 0 98 29 0 29 29 0 8 0 art_table 40 554 0 98 5 0 5 5 0 8 0 art_node 32 139 0 39 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 2 1 0 1 1 0 8 0 semapl 112 8 0 3 1 0 1 1 0 8 0 shmpl 112 5 0 1 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 1842 0 327 95 0 95 95 0 8 0 ffsino 296 1842 0 327 117 0 117 117 0 8 0 nchpl 144 2237 0 529 64 0 64 64 0 8 0 rtmask 32 2 0 2 1 0 1 1 0 8 1 vnodes 216 1994 0 0 111 0 111 111 0 8 0 namei 1024 6968 0 6968 3 2 1 2 0 8 1 percpumem 16 62 0 11 1 0 1 1 0 8 0 vcpupl 3968 2 0 0 1 0 1 1 0 8 0 vmpool 848 2 0 0 1 0 1 1 0 8 0 kstatmem 264 44 0 16 3 0 3 3 0 8 0 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 10490 0 10490 3 2 1 2 1 8 1 plimitpl 152 58 0 39 1 0 1 1 0 8 0 sigapl 424 616 0 569 7 1 6 7 0 8 0 knotepl 120 251 0 0 8 0 8 8 0 8 0 kqueuepl 224 70 0 58 1 0 1 1 0 8 0 pipepl 344 129 0 102 3 0 3 3 0 8 0 fdescpl 528 596 0 565 3 0 3 3 0 8 0 filepl 160 2442 0 2216 11 0 11 11 0 8 1 lockfpl 104 83 0 79 1 0 1 1 0 8 0 lockfspl 48 38 0 35 1 0 1 1 0 8 0 sessionpl 144 24 0 15 1 0 1 1 0 8 0 pgrppl 48 35 0 18 1 0 1 1 0 8 0 ucredpl 104 248 0 235 1 0 1 1 0 8 0 zombiepl 144 648 0 646 2 1 1 1 0 8 0 processpl 1232 616 0 569 5 0 5 5 0 8 0 procpl 664 898 0 840 7 1 6 6 0 8 0 sockpl 752 357 0 327 5 0 5 5 0 8 1 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 111 0 0 14 0 14 14 0 8 0 mcl2k 2048 28 0 0 4 0 4 4 0 8 0 mtagpl 96 8 0 0 1 0 1 1 0 8 0 mbufpl 256 161 0 0 11 0 11 11 0 8 0 bufpl 280 4174 0 133 289 0 289 289 0 8 0 anonpl 32 7564 0 0 61 0 61 61 0 246 0 amapchunkpl 152 13778 0 13290 29 0 29 29 0 158 8 amappl16 200 2875 0 2610 22 8 14 14 0 8 0 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 6 0 6 1 1 0 1 0 8 0 amappl13 176 447 0 446 1 0 1 1 0 8 0 amappl12 168 986 0 942 3 0 3 3 0 8 0 amappl11 160 7 0 7 2 2 0 1 0 8 0 amappl10 152 55 0 40 1 0 1 1 0 8 0 amappl9 144 249 0 249 1 1 0 1 0 8 0 amappl8 136 75 0 73 1 0 1 1 0 8 0 amappl7 128 83 0 82 1 0 1 1 0 8 0 amappl6 120 302 0 289 1 0 1 1 0 8 0 amappl5 112 76 0 66 1 0 1 1 0 8 0 amappl4 104 422 0 393 1 0 1 1 0 8 0 amappl3 96 2218 0 2124 4 1 3 3 0 8 0 amappl2 88 698 0 622 2 0 2 2 0 8 0 amappl1 80 9869 0 9280 14 0 14 14 0 8 1 amappl 88 3790 0 3626 5 0 5 5 0 92 0 uvmvnodes 80 103 0 0 3 0 3 3 0 8 0 dma65536 65536 1 0 1 1 0 1 1 0 8 1 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 2 0 1 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 9 0 1 1 0 1 1 0 8 0 uaddrrnd 24 596 0 565 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 596 0 565 1 0 1 1 0 8 0 vmmpekpl 168 6727 0 6686 3 0 3 3 0 8 0 vmmpepl 168 46623 0 44479 103 7 96 96 0 357 0 vmsppl 488 595 0 565 6 1 5 5 0 8 0 rwobjpl 80 16396 0 15127 29 2 27 27 0 8 0 pdppl 4096 1203 0 1132 102 27 75 85 0 8 4 pvpl 32 17067 0 0 138 0 138 138 0 265 0 pmappl 256 597 0 565 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 274 0 32 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff8389cff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c sys/dev/kcov.c:153 __mp_lock(ffffffff838b91c0) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff838b91c0) at __mp_lock+0x1a3 sys/kern/kern_lock.c:173 uvm_fault(fffffd806a10a3f8,bd300ec4000,0,2) at uvm_fault+0x1ea sys/uvm/uvm_fault.c:650 upageflttrap(ffff800034fdb680,bd300ec4000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff800034fdb680) at usertrap+0x42f sys/arch/amd64/amd64/trap.c:632 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7524bb55ca70, count: -9 ddb{0}> machine ddbcpu 1 Stopped at sys_semop+0x3d5: movzwl 0(%rax),%r15d ddb{1}> trace sys_semop(ffff80003c415a18,ffff80003c431560,ffff80003c4314b0) at sys_semop+0x3d5 sys/kern/sysv_sem.c:617 syscall(ffff80003c431560) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c431560) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xbd2a90a1060, count: -3