login: šjkernel: 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(ffff80003c4de568,ffff80003c451850,ffff80003c4517a0) at sys_semop+0x3d5 sys/kern/sysv_sem.c:617 syscall(ffff80003c451850) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c451850) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb24f42f8950, count: -3 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80003c451770 rbx 0xdeafbeaddeafbead rdx 0 rcx 0xffff80003c4de568 rax 0xdeafbeaddeafbead r8 0x7f7fffffc000 r9 0 r10 0x744775f4abf43cbe r11 0xa37f3a3da35286d1 r12 0 r13 0xfffffd8065461e70 r14 0xffff80003c451850 r15 0 rip 0xffffffff81994495 sys_semop+0x3d5 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80003c451680 ss 0x10 sys_semop+0x3d5: movzwl 0(%rax),%r15d ddb{0}> show proc PROC (syz-executor) tid=107066 pid=14458 tcnt=4 stat=onproc flags process=0 proc=4000000 runpri=86, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c4de038,0xffff80003c4defd8 process=0xffff80003c49c030 user=0xffff80003c44c000, vmspace=0xfffffd806b984d70 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 44814 18569 68003 0 2 0 syz-executor 44814 19346 68003 0 2 0x4000000 syz-executor 51291 455125 83510 0 7 0 syz-executor 51291 146599 83510 0 2 0x4000000 syz-executor 51291 123172 83510 0 3 0x4000080 fsleep syz-executor 51291 344510 83510 0 2 0x4000000 syz-executor 14458 40770 95266 0 2 0 syz-executor 14458 25032 95266 0 3 0x4000080 ttyin syz-executor *14458 107066 95266 0 7 0x4000000 syz-executor 14458 179919 95266 0 3 0x4000080 fsleep syz-executor 26241 479129 0 0 3 0x14200 acct acct 75156 261982 0 0 3 0x14280 nfsidl nfsio 19658 1356 0 0 3 0x14280 nfsidl nfsio 78013 299628 0 0 3 0x14280 nfsidl nfsio 80018 457848 0 0 3 0x14280 nfsidl nfsio 18587 344871 0 0 3 0x14280 nfsidl nfsio 54182 478907 0 0 3 0x14280 nfsidl nfsio 87681 416568 0 0 3 0x14280 nfsidl nfsio 67874 397344 0 0 3 0x14280 nfsidl nfsio 99917 113026 0 0 3 0x14280 nfsidl nfsio 25770 504828 0 0 3 0x14280 nfsidl nfsio 31370 111838 0 0 3 0x14280 nfsidl nfsio 24453 433210 0 0 3 0x14280 nfsidl nfsio 52878 218740 0 0 3 0x14280 nfsidl nfsio 75300 307257 0 0 3 0x14280 nfsidl nfsio 6983 329756 0 0 3 0x14280 nfsidl nfsio 51212 409169 0 0 3 0x14280 nfsidl nfsio 17457 177698 0 0 3 0x14280 nfsidl nfsio 76348 496423 0 0 3 0x14280 nfsidl nfsio 66134 429857 0 0 3 0x14280 nfsidl nfsio 68977 164446 0 0 3 0x14280 nfsidl nfsio 90711 330591 0 0 3 0x14200 bored sosplice 68003 285206 64561 0 3 0x82 nanoslp syz-executor 39755 250225 64561 0 2 0x2 syz-executor 83510 391599 64561 0 3 0x82 nanoslp syz-executor 78659 98032 64561 0 3 0x82 nanoslp syz-executor 95266 298799 64561 0 3 0x82 nanoslp syz-executor 48156 223384 64561 0 2 0x2 syz-executor 71310 31480 64561 0 3 0x82 nanoslp syz-executor 87297 227774 64561 0 2 0x2 syz-executor 64561 65184 92251 0 3 0x82 kqread syz-executor 92251 134395 3511 0 3 0x10008a sigsusp ksh 3511 131272 41325 0 3 0x98 kqread sshd-session 41325 305281 11938 0 3 0x92 kqread sshd-session 33998 407435 1 0 3 0x100083 ttyopn getty 11938 434116 1 0 3 0x88 kqread sshd 73274 19232 53758 74 3 0x1100092 bpf pflogd 53758 304609 1 0 3 0x80 sbwait pflogd 12438 409431 70950 73 3 0x1100090 kqread syslogd 70950 134772 1 0 3 0x100082 sbwait syslogd 26422 308118 1 0 3 0x100080 kqread resolvd 2114 483165 90096 77 3 0x100092 kqread dhcpleased 71886 49036 90096 77 3 0x100092 kqread dhcpleased 90096 350044 1 0 3 0x80 kqread dhcpleased 98011 81347 0 0 3 0x14200 bored smr 74901 11524 0 0 2 0x14200 zerothread 78423 142390 0 0 3 0x14200 aiodoned aiodoned 39042 213611 0 0 3 0x14200 syncer update 18995 139428 0 0 3 0x14200 cleaner cleaner 65018 7025 0 0 3 0x14200 reaper reaper 26273 171061 0 0 3 0x14200 pgdaemon pagedaemon 12399 13409 0 0 3 0x14200 bored viomb 43100 403797 0 0 3 0x40014200 acpi0 acpi0 10349 287360 0 0 3 0x40014200 idle1 22135 379357 0 0 3 0x14200 bored softnet7 36985 520715 0 0 3 0x14200 bored softnet6 4031 194240 0 0 3 0x14200 bored softnet5 40801 208218 0 0 3 0x14200 bored softnet4 76541 57084 0 0 3 0x14200 bored softnet3 77315 278229 0 0 3 0x14200 bored softnet2 66049 482479 0 0 3 0x14200 bored softnet1 24450 505912 0 0 3 0x14200 bored softnet0 40934 79389 0 0 3 0x14200 bored systqmp 65984 448343 0 0 3 0x14200 bored systq 69925 517618 0 0 3 0x14200 tmoslp softclockmp 7519 323964 0 0 3 0x40014200 tmoslp softclock 78655 217375 0 0 3 0x40014200 idle0 1 14079 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 44814 (syz-executor) thread 0xffff800034c1c7f0 (19346) exclusive rwlock vmmaplk r = 0 (0xfffffd806b984aa0) #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 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5168 #3 uvmfault_lookup+0xe8 sys/uvm/uvm_fault.c:1918 #4 uvm_fault_check+0x895 uvmfault_amapcopy sys/uvm/uvm_fault.c:235 [inline] #4 uvm_fault_check+0x895 sys/uvm/uvm_fault.c:784 #5 uvm_fault+0x106 sys/uvm/uvm_fault.c:677 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #7 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 #8 recall_trap+0x8 Process 14458 (syz-executor) thread 0xffff80003c4de568 (107066) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83917f80) #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:174 #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:748 #5 Xsyscall+0x128 Process 48156 (syz-executor) thread 0xffff80002a2c9a08 (223384) exclusive rwlock vmmaplk r = 0 (0xfffffd806b9846d0) #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 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5168 #3 uvmspace_fork+0x12b sys/uvm/uvm_map.c:3738 #4 process_new+0x577 sys/kern/kern_fork.c:281 #5 fork1+0x3f6 sys/kern/kern_fork.c:-1 #6 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 #7 Xsyscall+0x128 exclusive rwlock vmmaplk r = 0 (0xfffffd800b027c70) #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 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5168 #3 uvmspace_fork+0x44 sys/uvm/uvm_map.c:3729 #4 process_new+0x577 sys/kern/kern_fork.c:281 #5 fork1+0x3f6 sys/kern/kern_fork.c:-1 #6 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 #7 Xsyscall+0x128 Process 87297 (syz-executor) thread 0xffff80002a2c9240 (227774) exclusive rrwlock inode r = 0 (0xfffffd8065ee5330) #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+0xa3 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:748 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806cab18e0) #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+0xa3 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:748 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10258 11124K 12493K 166960K 11817 0 pcb 17 14K 15K 166960K 52 0 rtable 204 7K 7K 166960K 277 0 pf 34 17K 21K 166960K 68 0 ifaddr 43 7K 7K 166960K 56 0 ifgroup 55 2K 2K 166960K 71 0 sysctl 3 1K 9K 166960K 8 0 counters 68 36K 37K 166960K 90 0 ioctlops 0 0K 4K 166960K 1506 0 iov 0 0K 8K 166960K 6 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1411 89K 89K 166960K 1567 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 5 0 VM map 2 1K 1K 166960K 2 0 sem 4 0K 0K 166960K 5 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 89K 166960K 280 0 sigio 0 0K 0K 166960K 3 0 proc 72 115K 196K 166960K 548 0 subproc 72 4K 4K 166960K 73 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 14 0 in_multi 102 7K 7K 166960K 108 0 ether_multi 1 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 349 1553K 1553K 166960K 349 0 exec 0 0K 1K 166960K 457 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 231 159K 177K 166960K 4407 0 UVM aobj 5 2K 2K 166960K 5 0 pinsyscall 42 84K 103K 166960K 1413 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 12 0 NDP 12 0K 2K 166960K 36 0 temp 42 8639K 8704K 166960K 19282 0 kqueue 13 20K 28K 166960K 57 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 50 0 44 1 0 1 1 0 8 0 rtentry 176 98 0 7 5 0 5 5 0 8 0 unpcb 144 105 0 88 2 0 2 2 0 8 1 syncache 336 5 0 5 1 1 0 1 0 8 0 tcpcb 736 143 0 138 7 6 1 7 0 8 0 arp 128 11 0 2 1 0 1 1 0 8 0 inpcb 328 327 0 319 8 6 2 7 0 8 1 nd6 144 16 0 0 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 1 0 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 11 0 11 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 2 0 0 1 0 1 1 0 8 0 pfstitem 24 22 0 0 1 0 1 1 0 8 0 pfstkey 128 22 0 0 1 0 1 1 0 8 0 pfstate 384 22 0 0 3 0 3 3 0 8 0 pfrule 1344 23 0 16 2 0 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 442 0 6 28 0 28 28 0 8 0 art_table 40 443 0 6 5 0 5 5 0 8 0 art_node 32 98 0 17 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 3 2 1 1 1 0 8 1 semapl 112 2 0 1 1 0 1 1 0 8 0 shmpl 112 2 0 0 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 1867 0 355 95 0 95 95 0 8 0 ffsino 296 1867 0 355 117 0 117 117 0 8 0 nchpl 144 2270 0 576 64 0 64 64 0 8 0 rtmask 32 1 0 1 1 1 0 1 0 8 0 uvmvnodes 80 2092 0 0 43 0 43 43 0 8 0 vnodes 216 2092 0 0 117 0 117 117 0 8 0 namei 1024 7973 0 7972 5 2 3 3 0 8 2 percpumem 16 60 0 11 1 0 1 1 0 8 0 kstatmem 264 42 0 16 3 1 2 3 0 8 0 scxspl 216 8448 0 8448 3 2 1 2 1 8 1 plimitpl 152 76 0 58 1 0 1 1 0 8 0 sigapl 424 619 0 544 9 0 9 9 0 8 0 knotepl 120 562 0 0 18 0 18 18 0 8 0 kqueuepl 224 75 0 66 1 0 1 1 0 8 0 pipepl 344 124 0 97 3 0 3 3 0 8 0 fdescpl 528 575 0 544 3 0 3 3 0 8 0 filepl 160 2738 0 2517 20 9 11 20 0 8 0 lockfpl 104 109 0 107 1 0 1 1 0 8 0 lockfspl 48 49 0 47 1 0 1 1 0 8 0 sessionpl 144 24 0 15 1 0 1 1 0 8 0 pgrppl 48 36 0 19 1 0 1 1 0 8 0 ucredpl 104 409 0 394 1 0 1 1 0 8 0 zombiepl 144 561 0 558 1 0 1 1 0 8 0 processpl 1232 619 0 544 7 0 7 7 0 8 0 procpl 664 880 0 798 8 0 8 8 0 8 0 sosppl 168 4 0 4 1 0 1 1 0 8 1 sockpl 752 488 0 457 11 7 4 11 0 8 0 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 107 0 0 14 0 14 14 0 8 0 mcl2k 2048 29 0 0 4 0 4 4 0 8 0 mtagpl 96 7 0 0 1 0 1 1 0 8 0 mbufpl 256 163 0 0 11 0 11 11 0 8 0 bufpl 280 3614 0 122 250 0 250 250 0 8 0 anonpl 32 5860 0 0 48 0 48 48 0 246 0 amapchunkpl 152 13204 0 12739 31 6 25 26 0 158 4 amappl16 200 2397 0 2368 7 3 4 5 0 8 0 amappl15 192 39 0 39 1 1 0 1 0 8 0 amappl14 184 118 0 106 1 0 1 1 0 8 0 amappl13 176 5 0 5 1 1 0 1 0 8 0 amappl12 168 1236 0 1205 4 1 3 3 0 8 0 amappl11 160 59 0 45 1 0 1 1 0 8 0 amappl10 152 3 0 3 1 1 0 1 0 8 0 amappl9 144 251 0 250 1 0 1 1 0 8 0 amappl8 136 20 0 18 1 0 1 1 0 8 0 amappl7 128 135 0 123 1 0 1 1 0 8 0 amappl6 120 185 0 182 1 0 1 1 0 8 0 amappl5 112 128 0 119 1 0 1 1 0 8 0 amappl4 104 392 0 371 1 0 1 1 0 8 0 amappl3 96 2270 0 2164 4 0 4 4 0 8 0 amappl2 88 670 0 608 2 0 2 2 0 8 0 amappl1 80 9569 0 8975 16 0 16 16 0 8 2 amappl 88 3661 0 3502 4 0 4 4 0 92 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 7 0 7 2 2 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 4 0 0 1 0 1 1 0 8 0 uaddrrnd 24 575 0 544 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 575 0 544 1 0 1 1 0 8 0 vmmpekpl 168 6667 0 6627 3 0 3 3 0 8 0 vmmpepl 168 44054 0 42133 101 1 100 101 0 357 7 vmsppl 488 574 0 544 5 0 5 5 0 8 0 rwobjpl 80 17276 0 14263 66 0 66 66 0 8 1 pdppl 4096 1158 0 1088 102 26 76 84 0 8 6 pvpl 32 13679 0 0 113 2 111 111 0 265 0 pmappl 256 574 0 544 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 280 0 38 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace sys_semop(ffff80003c4de568,ffff80003c451850,ffff80003c4517a0) at sys_semop+0x3d5 sys/kern/sysv_sem.c:617 syscall(ffff80003c451850) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c451850) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb24f42f8950, count: -3 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff8000299fdff0) 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 end of kernel end trace frame: 0x7234793f3d20, count: -3