kernel: protection fault trap, code=0 Stopped at sys_semop+0x352: movzwl 0x8(%rbx),%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(ffff800031fdd780,ffff80003c45b860,ffff80003c45b7b0) at sys_semop+0x352 sys/kern/sysv_sem.c:622 syscall(ffff80003c45b860) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c45b860) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5533424f3c0, count: -3 ddb{0}> show registers rdi 0 rsi 0x6966 __ALIGN_SIZE+0x5966 rbp 0xffff80003c45b780 rbx 0xdeadbeefdeaff517 rdx 0 rcx 0xffff800031fdd780 rax 0xffffffff83814ff0 cpu_info_full_primary+0x1ff0 r8 0x7f7fffffc000 r9 0 r10 0xf247aee6ef91bdec r11 0x3819ba8675c7d507 r12 0x6966 __ALIGN_SIZE+0x5966 r13 0xfffffd806b360930 r14 0xffff80003c45b860 r15 0x6966 __ALIGN_SIZE+0x5966 rip 0xffffffff82a6a942 sys_semop+0x352 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80003c45b690 ss 0x10 sys_semop+0x352: movzwl 0x8(%rbx),%r15d ddb{0}> show proc PROC (syz-executor) tid=496187 pid=63919 tcnt=4 stat=onproc flags process=0 proc=4000000 runpri=80, usrpri=80, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800031fdd4e8,0xffff800031fdca98 process=0xffff800037ff3040 user=0xffff80003c456000, vmspace=0xfffffd805e8fa210 estcpu=30, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 19781 293123 6988 0 7 0 syz-executor 19781 112530 6988 0 2 0x4000000 syz-executor 30158 407026 37732 0 2 0 syz-executor 30158 395803 37732 0 2 0x4000000 syz-executor 70505 463506 50461 0 2 0 syz-executor 70505 153255 50461 0 3 0x4000080 fsleep syz-executor 63919 206541 55064 0 2 0 syz-executor 63919 487261 55064 0 2 0x4000000 syz-executor *63919 496187 55064 0 7 0x4000000 syz-executor 63919 4446 55064 0 3 0x4000080 fsleep syz-executor 2243 155041 63432 0 4 0x82000 syz-executor 2243 487867 63432 0 2 0x4082000 syz-executor 2243 143558 63432 0 4 0x4082000 syz-executor 2243 408188 63432 0 3 0x4082000 inode syz-executor 2243 417880 63432 0 3 0x4002000 suspend syz-executor 65210 511244 76441 0 3 0x3000 suspend syz-executor 65210 220001 76441 0 2 0x4081000 syz-executor 65210 111135 76441 0 3 0x4081000 fltagain2 syz-executor 65210 335002 76441 0 3 0x4081000 pipecl syz-executor 76441 177975 40987 0 3 0x82 wait syz-executor 50295 164431 0 0 3 0x14200 acct acct 74133 467428 0 0 3 0x14200 bored sosplice 37732 113674 40987 0 3 0x82 nanoslp syz-executor 55064 423419 40987 0 3 0x82 nanoslp syz-executor 70056 317438 40987 0 2 0x2 syz-executor 39874 282646 40987 0 3 0x82 nanoslp syz-executor 63432 314582 40987 0 3 0x82 nanoslp syz-executor 6988 68264 40987 0 3 0x82 nanoslp syz-executor 50461 252569 40987 0 3 0x82 nanoslp syz-executor 40987 171582 37343 0 3 0x82 kqread syz-executor 37343 148630 89621 0 3 0x10008a sigsusp ksh 89621 182788 48725 0 3 0x98 kqread sshd-session 48725 395663 87666 0 3 0x92 kqread sshd-session 35031 347688 1 0 3 0x100083 ttyin getty 87666 517722 1 0 3 0x88 kqread sshd 43532 209023 1833 74 3 0x1100092 bpf pflogd 1833 189892 1 0 3 0x80 sbwait pflogd 98555 446458 96991 73 3 0x1100090 kqread syslogd 96991 229087 1 0 3 0x100082 sbwait syslogd 74798 280380 1 0 3 0x100080 kqread resolvd 89473 513977 48556 77 3 0x100092 kqread dhcpleased 62888 163596 48556 77 3 0x100092 kqread dhcpleased 48556 297708 1 0 3 0x80 kqread dhcpleased 69438 360208 0 0 3 0x14200 bored smr 41901 428748 0 0 3 0x14200 pgzero zerothread 56220 182825 0 0 3 0x14200 aiodoned aiodoned 55730 437915 0 0 3 0x14200 syncer update 75422 84542 0 0 3 0x14200 cleaner cleaner 58968 399469 0 0 3 0x14200 reaper reaper 88393 119639 0 0 3 0x14200 pgdaemon pagedaemon 58005 437059 0 0 3 0x14200 bored viomb 63326 19876 0 0 3 0x40014200 acpi0 acpi0 73312 164723 0 0 3 0x40014200 idle1 33981 34103 0 0 3 0x14200 bored softnet1 18341 67655 0 0 3 0x14200 bored softnet0 47365 20398 0 0 3 0x14200 bored systqmp 13832 454064 0 0 3 0x14200 bored systq 68815 4900 0 0 3 0x14200 tmoslp softclockmp 3874 274239 0 0 3 0x40014200 tmoslp softclock 66802 384369 0 0 3 0x40014200 idle0 1 450774 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 63919 (syz-executor) thread 0xffff800031fdd4e8 (487261) exclusive rwlock fdlock r = 0 (0xffff800038ffa070) #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 doopenat+0x18e sys/kern/vfs_syscalls.c:1105 #3 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #3 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 #4 Xsyscall+0x128 Process 63919 (syz-executor) thread 0xffff800031fdd780 (496187) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8395f980) #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 2243 (syz-executor) thread 0xffff8000fffeea78 (487867) exclusive rrwlock inode r = 0 (0xfffffd806b4af0e0) #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 vn_write+0x18f sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x242 sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 #9 Xsyscall+0x128 Process 2243 (syz-executor) thread 0xffff800037fefa10 (408188) exclusive rrwlock inode r = 0 (0xfffffd806b4af7d0) #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 vn_open+0x15a sys/kern/vfs_vnops.c:140 #8 doopenat+0x35b sys/kern/vfs_syscalls.c:1138 #9 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 #10 Xsyscall+0x128 Process 65210 (syz-executor) thread 0xffff800031fdc2c0 (220001) exclusive rrwlock inode r = 0 (0xfffffd806e145930) #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 vn_write+0x18f sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x242 sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 #9 Xsyscall+0x128 Process 70056 (syz-executor) thread 0xffff8000fffefa08 (317438) exclusive rwlock vmmaplk r = 0 (0xfffffd805e8fa4f8) #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:5171 #3 uvmspace_fork+0x12b sys/uvm/uvm_map.c:3741 #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 (0xfffffd800b027e58) #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:5171 #3 uvmspace_fork+0x44 sys/uvm/uvm_map.c:3732 #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 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10257 11138K 11322K 166960K 11842 0 pcb 17 12K 12K 166960K 96 0 rtable 196 6K 7K 166960K 308 0 pf 32 17K 67486K 166960K 78 0 ifaddr 38 6K 7K 166960K 63 0 ifgroup 51 2K 2K 166960K 97 0 sysctl 4 1K 9K 166960K 11 0 counters 66 36K 37K 166960K 98 0 ioctlops 0 0K 4K 166960K 1537 0 iov 0 0K 12K 166960K 25 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1426 90K 90K 166960K 1795 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 12 0K 0K 166960K 21 0 dirhash 12 2K 2K 166960K 21 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 106K 166960K 573 0 sigio 0 0K 0K 166960K 13 0 proc 72 115K 164K 166960K 602 0 subproc 72 4K 4K 166960K 83 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 62 0 in_multi 87 6K 7K 166960K 142 0 ether_multi 1 0K 0K 166960K 9 0 mrt 0 0K 0K 166960K 3 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 283 1261K 1261K 166960K 283 0 exec 0 0K 1K 166960K 532 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 252 181K 190K 166960K 6936 0 UVM aobj 10 2K 2K 166960K 10 0 pinsyscall 43 86K 106K 166960K 1690 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 28 0 NDP 11 0K 2K 166960K 42 0 temp 45 8648K 8716K 166960K 13969 0 kqueue 13 20K 28K 166960K 113 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 61 0 58 1 0 1 1 0 8 0 rtentry 176 108 0 23 5 0 5 5 0 8 0 unpcb 144 348 0 329 5 3 2 4 0 8 1 syncache 336 7 0 7 2 1 1 1 0 8 1 tcpqe 32 2 0 2 2 1 1 1 0 8 1 tcpcb 736 122 0 115 2 0 2 2 0 8 1 arp 136 11 0 3 1 0 1 1 0 8 0 inpcb 328 482 0 469 7 5 2 7 0 8 0 nd6 152 21 0 4 1 0 1 1 0 8 0 pkpcb 40 2 0 2 2 1 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1192 9 0 9 2 1 1 1 0 8 1 pppxif 1504 1 0 1 1 1 0 1 0 8 0 pffrag 232 5 0 0 1 0 1 1 0 482 0 pffrnode 88 5 0 0 1 0 1 1 0 8 0 pffrent 40 7 0 2 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 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 42 0 10 1 0 1 1 0 8 0 pfstkey 128 42 0 10 2 0 2 2 0 8 0 pfstate 384 42 0 10 4 0 4 4 0 8 0 pfrule 1344 24 0 19 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 494 0 93 28 0 28 28 0 8 2 art_table 40 495 0 93 5 0 5 5 0 8 0 art_node 32 108 0 32 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 2 1 0 1 1 0 8 0 semupl 112 2 0 2 2 1 1 1 0 8 1 semapl 112 17 0 8 1 0 1 1 0 8 0 shmpl 112 7 0 0 1 0 1 1 0 8 0 dirhash 1024 23 0 6 3 0 3 3 0 8 0 dino2pl 256 2405 0 889 97 1 96 96 0 8 0 ffsino 296 2405 0 889 117 0 117 117 0 8 0 nchpl 144 3193 0 1499 64 0 64 64 0 8 0 vnodes 216 2751 0 0 153 0 153 153 0 8 0 namei 1024 11058 0 11057 3 2 1 2 0 8 0 percpumem 16 64 0 16 1 0 1 1 0 8 0 kstatmem 264 50 0 26 4 1 3 3 0 8 1 scsiplug 72 2 0 2 2 2 0 1 0 8 0 scxspl 216 19919 0 19919 11 3 8 8 1 8 8 plimitpl 152 187 0 168 1 0 1 1 0 8 0 sigapl 424 866 0 816 7 1 6 7 0 8 0 knotepl 120 354 0 0 11 0 11 11 0 8 0 kqueuepl 224 251 0 241 5 3 2 5 0 8 1 pipepl 344 222 0 194 6 3 3 6 0 8 0 fdescpl 528 848 0 816 3 0 3 3 0 8 0 filepl 160 4538 0 4295 19 7 12 18 0 8 1 lockfpl 104 163 0 160 1 0 1 1 0 8 0 lockfspl 48 66 0 63 1 0 1 1 0 8 0 sessionpl 144 27 0 18 1 0 1 1 0 8 0 pgrppl 48 47 0 30 1 0 1 1 0 8 0 ucredpl 104 668 0 655 1 0 1 1 0 8 0 zombiepl 144 948 0 946 2 1 1 1 0 8 0 processpl 1232 866 0 816 5 0 5 5 0 8 0 procpl 664 1641 0 1578 6 0 6 6 0 8 0 sosppl 168 3 0 3 2 1 1 1 0 8 1 sockpl 752 905 0 870 17 12 5 17 0 8 1 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 114 0 0 15 1 14 15 0 8 0 mcl2k 2048 25 0 0 4 0 4 4 0 8 0 mtagpl 96 5 0 0 1 0 1 1 0 8 0 mbufpl 256 1785 0 0 112 0 112 112 0 8 0 bufpl 280 8316 0 2173 440 0 440 440 0 8 0 anonpl 32 10281 0 0 83 0 83 83 0 246 0 amapchunkpl 152 22599 0 22023 46 17 29 34 0 158 4 amappl16 200 3340 0 3025 32 15 17 17 0 8 0 amappl15 192 4 0 4 2 2 0 1 0 8 0 amappl14 184 128 0 116 1 0 1 1 0 8 0 amappl13 176 6 0 6 1 1 0 1 0 8 0 amappl12 168 1510 0 1479 3 1 2 2 0 8 0 amappl11 160 55 0 39 1 0 1 1 0 8 0 amappl10 152 16 0 16 1 1 0 1 0 8 0 amappl9 144 257 0 257 1 1 0 1 0 8 0 amappl8 136 26 0 24 1 0 1 1 0 8 0 amappl7 128 111 0 98 1 0 1 1 0 8 0 amappl6 120 203 0 200 1 0 1 1 0 8 0 amappl5 112 124 0 114 1 0 1 1 0 8 0 amappl4 104 308 0 286 1 0 1 1 0 8 0 amappl3 96 3702 0 3600 3 0 3 3 0 8 0 amappl2 88 1104 0 1026 2 0 2 2 0 8 0 amappl1 80 10791 0 10191 16 1 15 15 0 8 0 amappl 88 6141 0 5965 5 0 5 5 0 92 0 uvmvnodes 80 2751 0 0 57 0 57 57 0 8 0 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 128 254 0 254 2 2 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 0 1 0 1 1 0 8 0 uaddrrnd 24 848 0 816 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 848 0 816 1 0 1 1 0 8 0 vmmpekpl 168 9007 0 8968 4 1 3 3 0 8 0 vmmpepl 168 60869 0 58546 111 8 103 103 0 357 0 vmsppl 488 847 0 816 6 1 5 5 0 8 0 rwobjpl 80 21873 0 17883 82 0 82 82 0 8 0 pdppl 4096 1703 0 1632 103 30 73 87 0 8 2 pvpl 32 17490 0 0 142 0 142 142 0 265 0 pmappl 256 847 0 816 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 381 0 37 10 0 10 10 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace sys_semop(ffff800031fdd780,ffff80003c45b860,ffff80003c45b7b0) at sys_semop+0x352 sys/kern/sysv_sem.c:622 syscall(ffff80003c45b860) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c45b860) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5533424f3c0, count: -3 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff8000299edff0) 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: 0x7c4430671510, count: -3