kernel: protection fault trap, code=0 Stopped at sys_semop+0x3d5: movzwl 0(%rax),%r15d ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace sys_semop(ffff80003c417250,ffff80003a3eccb0,ffff80003a3ecc00) at sys_semop+0x3d5 sys/kern/sysv_sem.c:617 syscall(ffff80003a3eccb0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003a3eccb0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x9ae0fb3dba0, count: -3 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80003a3ecbd0 rbx 0xdeadbeefdeadbeef rdx 0 rcx 0xffff80003c417250 rax 0xdeadbeefdeadbeef r8 0x7f7fffffc000 r9 0 r10 0x9fbaa88e93df0dd3 r11 0x2085fb1987904d9f r12 0 r13 0xfffffd806c11c3f0 r14 0xffff80003a3eccb0 r15 0 rip 0xffffffff832ae8c5 sys_semop+0x3d5 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80003a3ecae0 ss 0x10 sys_semop+0x3d5: movzwl 0(%rax),%r15d ddb{0}> show proc PROC (syz-executor) tid=347822 pid=69410 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=0xffff80003c417a18,0xffff80003c4174f8 process=0xffff8000fffef508 user=0xffff80003a3e7000, vmspace=0xfffffd8073ce7200 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 69410 430516 13480 0 2 0 syz-executor *69410 347822 13480 0 7 0x4000000 syz-executor 69410 165478 13480 0 3 0x4000080 fsleep syz-executor 69410 55536 13480 0 3 0x4000080 fsleep syz-executor 97798 297296 86190 0 2 0 syz-executor 11151 107862 4713 0 4 0x82004 syz-executor 11151 326000 4713 0 2 0x4002004 syz-executor 11151 51327 4713 0 4 0x4082004 syz-executor 97915 40542 0 0 3 0x14200 acct acct 92621 376707 1 0 3 0x100083 ttyin getty 86190 392142 22383 0 3 0x82 nanoslp syz-executor 4713 340086 22383 0 3 0x82 nanoslp syz-executor 422 24095 22383 0 2 0x2 syz-executor 33298 166760 22383 0 3 0x82 wait syz-executor 79208 72145 22383 0 7 0x2 syz-executor 62992 473083 22383 0 3 0x82 wait syz-executor 28470 139461 22383 0 2 0x2 syz-executor 13480 401556 22383 0 3 0x82 nanoslp syz-executor 22383 262829 37867 0 3 0x82 kqread syz-executor 37867 252649 33517 0 3 0x10008a sigsusp ksh 33517 335570 38842 0 3 0x98 kqread sshd-session 38842 253338 23293 0 3 0x92 kqread sshd-session 23293 230161 1 0 3 0x88 kqread sshd 10408 225519 92351 74 3 0x1100092 bpf pflogd 92351 201327 1 0 3 0x80 sbwait pflogd 48552 249141 55017 73 3 0x1100090 kqread syslogd 55017 6374 1 0 3 0x100082 sbwait syslogd 82850 442189 1 0 3 0x100080 kqread resolvd 9199 201383 65718 77 3 0x100092 kqread dhcpleased 79280 20393 65718 77 3 0x100092 kqread dhcpleased 65718 495592 1 0 3 0x80 kqread dhcpleased 2904 330435 0 0 3 0x14200 bored smr 99654 8101 0 0 2 0x14200 zerothread 71198 120376 0 0 3 0x14200 aiodoned aiodoned 18761 193973 0 0 3 0x14200 syncer update 37547 484646 0 0 3 0x14200 cleaner cleaner 13878 14223 0 0 3 0x14200 reaper reaper 60502 132816 0 0 3 0x14200 pgdaemon pagedaemon 2163 458213 0 0 3 0x14200 bored viomb 62212 372847 0 0 3 0x40014200 acpi0 acpi0 55443 53901 0 0 3 0x40014200 idle1 35879 471449 0 0 3 0x14200 bored softnet1 6557 452088 0 0 3 0x14200 bored softnet0 83642 35154 0 0 3 0x14200 bored systqmp 57462 93080 0 0 3 0x14200 bored systq 65219 356717 0 0 3 0x14200 tmoslp softclockmp 64918 115321 0 0 3 0x40014200 tmoslp softclock 95587 49288 0 0 3 0x40014200 idle0 1 293429 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 69410 (syz-executor) thread 0xffff80003c417250 (347822) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83953e80) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 #2 malloc+0xe3 sys/kern/kern_malloc.c:175 #3 sys_semop+0x22f sys/kern/sysv_sem.c:-1 #4 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #4 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #5 Xsyscall+0x128 Process 97798 (syz-executor) thread 0xffff80003c416028 (297296) exclusive rwlock vmmaplk r = 0 (0xfffffd8073ce7aa0) #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+0x42f sys/arch/amd64/amd64/trap.c:632 #7 recall_trap+0x8 Process 28470 (syz-executor) thread 0xffff80002a279c98 (139461) exclusive rrwlock inode r = 0 (0xfffffd806e82eb88) #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:159 #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:3113 #10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8078e14320) #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:570 #5 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3098 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11104 12107K 13929K 166960K 14880 0 pcb 17 18K 32K 166960K 754 0 rtable 232 14K 15K 166960K 891 0 pf 39 18K 87K 166960K 407 0 ifaddr 36 7K 8K 166960K 246 0 ifgroup 52 2K 2K 166960K 442 0 sysctl 4 1K 9K 166960K 35 0 counters 70 37K 38K 166960K 572 0 ioctlops 0 0K 8K 166960K 2271 0 iov 0 0K 24K 166960K 146 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1454 91K 92K 166960K 3530 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 40 0 VM map 2 1K 1K 166960K 2 0 sem 15 1K 1K 166960K 214 0 dirhash 12 2K 2K 166960K 51 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 240K 166960K 2762 0 sigio 0 0K 0K 166960K 58 0 proc 73 115K 164K 166960K 969 0 subproc 72 4K 4K 166960K 127 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 632 0 in_multi 73 5K 7K 166960K 287 0 ether_multi 1 0K 0K 166960K 37 0 mrt 1 0K 0K 166960K 24 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 277 1235K 1235K 166960K 277 0 exec 1 0K 1K 166960K 964 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 248 160K 174K 166960K 26859 0 UVM aobj 65 26K 30K 166960K 82 0 pinsyscall 41 82K 104K 166960K 4025 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 383 0 NDP 12 0K 2K 166960K 176 0 temp 83 8688K 8814K 166960K 125201 0 kqueue 13 20K 34K 166960K 607 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 120 393 0 389 5 3 2 3 0 8 1 rtentry 176 241 0 156 6 0 6 6 0 8 0 unpcb 144 1791 0 1774 15 13 2 4 0 8 1 syncache 336 7 0 7 2 2 0 1 0 8 0 tcpqe 32 4 0 4 2 2 0 1 0 8 0 tcpcb 736 935 0 931 17 13 4 7 0 8 3 arp 136 33 0 17 1 0 1 1 0 8 0 inpcb 328 3525 0 3516 41 37 4 18 0 8 2 nd6 152 48 0 27 2 0 2 2 0 8 0 pkpcb 40 18 0 18 7 7 0 1 0 8 0 kcovpl 48 14 0 6 1 0 1 1 0 8 0 mppekey 1024 4 0 4 4 3 1 1 0 8 1 ppxss 1192 205 0 205 5 4 1 1 0 8 1 pppxif 1504 32 0 32 4 4 0 1 0 8 0 pfstscr 40 2 0 2 2 2 0 1 0 8 0 pffrag 232 38 0 24 2 0 2 2 0 482 0 pffrnode 88 37 0 23 1 0 1 1 0 8 0 pffrent 40 67 0 53 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 7 0 4 1 0 1 1 0 8 0 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pftag 88 4 0 0 1 0 1 1 0 8 0 pfstkey 128 5 0 5 2 2 0 1 0 8 0 pfstate 448 3 0 3 2 2 0 1 0 8 0 pfrule 1360 8 0 4 1 0 1 1 0 8 0 rttmr 136 4 0 4 3 3 0 1 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 1044 0 698 34 10 24 29 0 8 0 art_table 40 1048 0 698 5 0 5 5 0 8 0 art_node 32 239 0 164 1 0 1 1 0 8 0 sysvmsgpl 40 52 0 43 2 1 1 1 0 8 0 semapl 112 204 0 192 1 0 1 1 0 8 0 shmpl 112 58 0 7 2 0 2 2 0 8 0 dirhash 1024 44 0 27 3 0 3 3 0 8 0 dino2pl 256 6745 0 5226 96 0 96 96 0 8 0 ffsino 296 6745 0 5226 118 0 118 118 0 8 0 nchpl 144 10558 0 8842 65 0 65 65 0 8 0 rtmask 32 24 0 24 6 5 1 1 0 8 1 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 37579 0 37577 8 7 1 3 0 8 0 percpumem 16 301 0 251 1 0 1 1 0 8 0 vcpupl 3968 12 0 1 2 0 2 2 0 8 0 vmpool 848 21 0 10 3 1 2 2 0 8 0 pfiaddrpl 120 1 0 0 1 0 1 1 0 8 0 kstatmem 264 296 0 268 6 3 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 10 0 10 7 7 0 1 0 8 0 scxspl 216 79199 0 79199 23 21 2 8 1 8 2 plimitpl 152 933 0 915 1 0 1 1 0 8 0 sigapl 424 3033 0 2986 7 0 7 7 0 8 0 knotepl 120 685 0 0 21 0 21 21 0 8 0 kqueuepl 224 1240 0 1231 19 18 1 5 0 8 0 pipepl 344 373 0 346 3 0 3 3 0 8 0 fdescpl 528 3008 0 2978 3 0 3 3 0 8 0 filepl 160 21239 0 21022 44 30 14 19 0 8 1 lockfpl 104 1061 0 1059 1 0 1 1 0 8 0 lockfspl 48 382 0 380 1 0 1 1 0 8 0 sessionpl 144 33 0 24 1 0 1 1 0 8 0 pgrppl 48 127 0 110 1 0 1 1 0 8 0 ucredpl 104 3681 0 3667 1 0 1 1 0 8 0 zombiepl 144 3402 0 3399 2 1 1 1 0 8 0 processpl 1232 3033 0 2986 5 1 4 5 0 8 0 procpl 664 7546 0 7494 7 0 7 7 0 8 0 sosppl 176 33 0 33 6 5 1 1 0 8 1 sockpl 752 5913 0 5883 61 53 8 24 0 8 4 mcl64k 65536 8 0 0 1 0 1 1 0 8 0 mcl16k 16384 5 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 127 0 0 16 0 16 16 0 8 0 mcl2k 2048 26 0 0 4 1 3 4 0 8 0 mtagpl 96 8 0 0 1 0 1 1 0 8 0 mbufpl 256 1854 0 0 115 0 115 115 0 8 0 bufpl 280 32315 0 26179 439 0 439 439 0 8 0 anonpl 32 13759 0 0 111 0 111 111 0 246 0 amapchunkpl 152 93326 0 92767 66 33 33 34 0 158 4 amappl16 200 10943 0 10816 52 28 24 27 0 8 6 amappl15 192 9 0 9 1 1 0 1 0 8 0 amappl14 184 4 0 4 1 1 0 1 0 8 0 amappl13 176 496 0 495 1 0 1 1 0 8 0 amappl12 168 3414 0 3373 3 0 3 3 0 8 0 amappl11 160 67 0 67 2 2 0 1 0 8 0 amappl10 152 47 0 33 1 0 1 1 0 8 0 amappl9 144 258 0 258 1 1 0 1 0 8 0 amappl8 136 25 0 22 1 0 1 1 0 8 0 amappl7 128 104 0 101 1 0 1 1 0 8 0 amappl6 120 408 0 394 1 0 1 1 0 8 0 amappl5 112 83 0 72 1 0 1 1 0 8 0 amappl4 104 479 0 446 1 0 1 1 0 8 0 amappl3 96 16512 0 16420 4 1 3 3 0 8 0 amappl2 88 3121 0 3044 2 0 2 2 0 8 0 amappl1 80 21054 0 20463 15 1 14 15 0 8 0 amappl 88 25575 0 25404 5 0 5 5 0 92 0 uvmvnodes 80 198 0 0 5 0 5 5 0 8 0 dma65536 65536 1 0 1 1 1 0 1 0 8 0 dma32768 32768 1 0 1 1 1 0 1 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 1 0 1 1 0 1 1 0 8 1 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 7 0 7 2 2 0 1 0 8 0 dma128 128 258 0 258 5 5 0 1 0 8 0 dma64 64 9 0 9 3 3 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 81 0 17 2 0 2 2 0 8 0 uaddrrnd 24 3008 0 2978 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3008 0 2978 1 0 1 1 0 8 0 vmmpekpl 168 24298 0 24240 4 1 3 3 0 8 0 vmmpepl 168 195862 0 193868 134 27 107 108 0 357 8 vmsppl 488 3007 0 2978 5 0 5 5 0 8 0 rwobjpl 80 51533 0 50221 38 4 34 35 0 8 0 pdppl 4096 6065 0 5987 127 44 83 87 0 8 5 pvpl 32 22474 0 0 182 1 181 181 0 265 0 pmappl 256 3028 0 2988 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 446 0 87 11 0 11 11 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace sys_semop(ffff80003c417250,ffff80003a3eccb0,ffff80003a3ecc00) at sys_semop+0x3d5 sys/kern/sysv_sem.c:617 syscall(ffff80003a3eccb0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003a3eccb0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x9ae0fb3dba0, count: -3 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff8000299ddff0) 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(ffffffff83953680) at __mp_lock+0x190 __mp_lock_spin sys/kern/kern_lock.c:143 [inline] __mp_lock(ffffffff83953680) at __mp_lock+0x190 sys/kern/kern_lock.c:173 __mp_acquire_count(ffffffff83953680,1) at __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 pool_get(ffffffff839eb000,1) at pool_get+0x27e sys/kern/subr_pool.c:591 uvm_mapent_alloc(ffffffff838cb0f0,1323) at uvm_mapent_alloc+0x3a4 sys/uvm/uvm_map.c:-1 uvm_map(ffffffff838cb0f0,ffff80003c445260,6000,0,ffffffffffffffff,0,7f61c142f7da1bed) at uvm_map+0x3bb sys/uvm/uvm_map.c:-1 km_alloc(6000,ffffffff8379c628,ffffffff8348b0b8,ffffffff8348b130) at km_alloc+0x209 sys/uvm/uvm_km.c:628 uvm_uarea_alloc() at uvm_uarea_alloc+0x52 sys/uvm/uvm_glue.c:-1 fork1(ffff8000fffeb248,1,ffffffff814558d0,0,ffff80003c4453f0,0) at fork1+0x315 sys/kern/kern_fork.c:395 syscall(ffff80003c4454a0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4454a0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7ef3ff7dcd10, count: -13