,XS,骙(nQ\!)1zKnBN-o9eQj iHzjֹ"6y ܶ|J_ V'^witness: thread 0xffff800020b28508 exiting with the following locks held: exclusive rrwlock inode r = 0 (0xfffffd806fa844e0) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 rw_enter+0x46d sys/kern/kern_rwlock.c:306 #2 rrw_enter+0x4f sys/kern/kern_rwlock.c:435 #3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:602 #4 vn_rdwr+0x109 vn_lock sys/kern/vfs_vnops.c:561 [inline] #4 vn_rdwr+0x109 sys/kern/vfs_vnops.c:317 #5 acct_process+0x5db sys/kern/kern_acct.c:221 #6 exit1+0x361 sys/kern/kern_exit.c:208 #7 sys_exit+0x17 sys/kern/kern_exit.c:94 #8 syscall+0x552 mi_syscall sys/sys/syscall_mi.h:92 [inline] #8 syscall+0x552 sys/arch/amd64/amd64/trap.c:555 #9 Xsyscall+0x128 panic: thread 0xffff800020b28508 cannot exit while holding sleeplocks Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 449092 6300 0 0x2 0x480 1 syz-executor.1 * 92291 36475 0 0x14000 0x200 0 reaper db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic() at panic+0x15c sys/kern/subr_prf.c:207 witness_thread_exit(ffff800020b28508) at witness_thread_exit+0x213 sys/kern/subr_witness.c:1364 reaper(ffff800020aff3c8) at reaper+0x14c sys/kern/kern_exit.c:423 end trace frame: 0x0, count: 11 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 thread 0xffff800020b28508 cannot exit while holding sleeplocks ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic() at panic+0x15c sys/kern/subr_prf.c:207 witness_thread_exit(ffff800020b28508) at witness_thread_exit+0x213 sys/kern/subr_witness.c:1364 reaper(ffff800020aff3c8) at reaper+0x14c sys/kern/kern_exit.c:423 end trace frame: 0x0, count: -4 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800020afcff0 rbx 0xffff800020afd0a0 rdx 0xffff800020aff3c8 rcx 0 rax 0 r8 0xffffffff815a9073 kprintf+0x173 r9 0x1 r10 0x25 r11 0xfc76c3001b256bb7 r12 0x3000000008 r13 0xffff800020afd000 r14 0x100 r15 0x1 rip 0xffffffff81e595e8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020afcfe0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (reaper) pid=92291 stat=onproc flags process=14000 proc=200 pri=4, usrpri=51, nice=20 forw=0xffffffffffffffff, list=0xffff800020ab1b28,0xffff800020afe780 process=0xffff800020aea708 user=0xffff800020af8000, vmspace=0xffffffff8236a918 estcpu=1, cpticks=6, pctcpu=0.62 user=0, sys=5, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 79895 64391 41056 0 2 0x480 syz-executor.0 79895 452131 41056 0 3 0x4000080 fsleep syz-executor.0 79895 390308 41056 0 2 0x4000000 syz-executor.0 72978 276974 0 0 3 0x14200 acct acct 6300 449092 1984 0 7 0x482 syz-executor.1 41666 40162 1 0 3 0x100083 ttyin getty 41056 90188 1984 0 2 0x482 syz-executor.0 78997 86808 0 0 3 0x14200 bored sosplice 1984 42126 81092 0 3 0x82 thrsleep syz-fuzzer 1984 131567 81092 0 3 0x4000082 thrsleep syz-fuzzer 1984 53617 81092 0 3 0x4000082 thrsleep syz-fuzzer 1984 523974 81092 0 3 0x4000082 thrsleep syz-fuzzer 1984 116669 81092 0 3 0x4000082 thrsleep syz-fuzzer 1984 210190 81092 0 3 0x4000082 thrsleep syz-fuzzer 1984 504902 81092 0 3 0x4000082 thrsleep syz-fuzzer 1984 108508 81092 0 3 0x4000082 thrsleep syz-fuzzer 1984 22365 81092 0 3 0x4000082 thrsleep syz-fuzzer 1984 248271 81092 0 3 0x4000082 kqread syz-fuzzer 81092 81009 58386 0 3 0x10008a pause ksh 58386 175166 38300 0 3 0x92 select sshd 38300 230356 1 0 3 0x80 select sshd 6721 77084 29790 74 2 0x100492 pflogd 29790 70047 1 0 3 0x80 netio pflogd 10247 204728 86312 73 2 0x100090 syslogd 86312 146526 1 0 3 0x100082 netio syslogd 32778 47482 1 77 3 0x100090 poll dhclient 19960 332629 1 0 3 0x80 poll dhclient 53383 229689 0 0 3 0x14200 pgzero zerothread 89709 193774 0 0 3 0x14200 aiodoned aiodoned 30506 430046 0 0 3 0x14200 syncer update 83511 154948 0 0 3 0x14200 cleaner cleaner *36475 92291 0 0 7 0x14200 reaper 34801 249402 0 0 3 0x14200 pgdaemon pagedaemon 2164 435954 0 0 3 0x14200 bored crynlk 23050 161679 0 0 3 0x14200 bored crypto 83949 284305 0 0 3 0x40014200 acpi0 acpi0 28694 320255 0 0 3 0x40014200 idle1 54902 190058 0 0 3 0x14200 bored softnet 51524 422319 0 0 3 0x14200 bored systqmp 58709 242230 0 0 3 0x14200 bored systq 41835 296143 0 0 2 0x40014200 softclock 49259 89283 0 0 3 0x40014200 idle0 59249 170081 0 0 2 0x40014200 smr 1 228380 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9554 6497K 7250K 78643K 14247 0 0 pcb 13 8K 8K 78643K 134 0 0 rtable 86 3K 4K 78643K 549 0 0 ifaddr 62 13K 15K 78643K 207 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1554 0 0 iov 0 0K 32K 78643K 187 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1210 76K 77K 78643K 2610 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 5K 78643K 17 0 0 VM map 2 1K 1K 78643K 2 0 0 sem 12 0K 0K 78643K 178 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12765 0 0 file desc 5 13K 25K 78643K 1550 0 0 sigio 0 0K 0K 78643K 15 0 0 proc 54 51K 71K 78643K 704 0 0 subproc 32 2K 2K 78643K 70 0 0 NFS srvsock 1 0K 0K 78643K 1 0 0 NFS daemon 1 16K 16K 78643K 1 0 0 ip_moptions 0 0K 0K 78643K 134 0 0 in_multi 22 1K 2K 78643K 118 0 0 ether_multi 1 0K 0K 78643K 13 0 0 mrt 0 0K 0K 78643K 10 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 96 424K 424K 78643K 96 0 0 exec 0 0K 1K 78643K 351 0 0 pfkey data 0 0K 0K 78643K 1 0 0 pagedep 1 8K 8K 78643K 1 0 0 inodedep 1 32K 32K 78643K 1 0 0 newblk 1 0K 0K 78643K 1 0 0 VM swap 7 26K 26K 78643K 7 0 0 UVM amap 102 21K 30K 78643K 5956 0 0 UVM aobj 74 5K 5K 78643K 77 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 ip6_options 0 0K 0K 78643K 87 0 0 NDP 14 0K 0K 78643K 58 0 0 temp 187 2752K 2820K 78643K 11851 0 0 kqueue 0 0K 0K 78643K 18 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 10 0 6 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 74 0 72 1 0 1 1 0 8 0 rtentry 112 70 0 37 2 1 1 2 0 8 0 unpcb 120 473 0 463 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 7357 0 7357 2 2 0 2 0 8 0 tcpcb 544 291 0 287 1 0 1 1 0 8 0 inpcb 280 778 0 771 2 1 1 2 0 8 0 rttmr 72 1 0 1 1 1 0 1 0 8 0 nd6 48 12 0 9 1 0 1 1 0 8 0 pkpcb 40 3 0 3 2 2 0 1 0 8 0 ppxss 1128 26 0 26 4 3 1 1 0 8 1 pffrag 232 2 0 2 1 1 0 1 0 482 0 pffrnode 88 2 0 2 1 1 0 1 0 8 0 pffrent 40 4 0 4 1 1 0 1 0 8 0 pfosfp 40 846 0 846 5 5 0 5 0 8 0 pfosfpen 112 1428 0 1428 21 21 0 21 0 8 0 pfstitem 24 36 0 23 1 0 1 1 0 8 0 pfstkey 112 36 0 23 1 0 1 1 0 8 0 pfstate 328 36 0 23 2 0 2 2 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 286 0 139 12 2 10 12 0 8 0 art_table 32 287 0 139 2 0 2 2 0 8 0 art_node 16 67 0 37 1 0 1 1 0 8 0 sysvmsgpl 40 14 0 12 2 1 1 1 0 8 0 semapl 112 176 0 166 1 0 1 1 0 8 0 shmpl 112 75 0 3 3 0 3 3 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 3864 0 2445 47 0 47 47 0 8 0 ffsino 272 3864 0 2445 96 0 96 96 0 8 0 nchpl 144 6307 0 4683 62 0 62 62 0 8 0 uvmvnodes 72 4862 0 0 89 0 89 89 0 8 0 vnodes 200 4862 0 0 256 0 256 256 0 8 0 namei 1024 19933 0 19933 2 1 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 scsiplug 64 2 0 2 1 0 1 1 0 8 1 scxspl 192 18066 0 18066 15 12 3 6 0 8 3 plimitpl 152 149 0 141 1 0 1 1 0 8 0 sigapl 432 1748 0 1733 3 1 2 3 0 8 0 futexpl 56 19502 0 19501 1 0 1 1 0 8 0 knotepl 112 349 0 330 1 0 1 1 0 8 0 kqueuepl 104 357 0 355 1 0 1 1 0 8 0 pipepl 112 1090 0 1071 6 5 1 2 0 8 0 fdescpl 488 1749 0 1733 3 0 3 3 0 8 0 filepl 152 10411 0 10311 10 5 5 7 0 8 0 lockfpl 104 503 0 503 2 1 1 1 0 8 1 lockfspl 48 176 0 176 2 1 1 1 0 8 1 sessionpl 112 24 0 13 1 0 1 1 0 8 0 pgrppl 48 39 0 28 1 0 1 1 0 8 0 ucredpl 96 2028 0 2019 1 0 1 1 0 8 0 zombiepl 144 1733 0 1732 2 1 1 1 0 8 0 processpl 896 1766 0 1732 4 0 4 4 0 8 0 procpl 632 5050 0 5005 6 1 5 5 0 8 1 srpgc 64 7 0 7 2 2 0 1 0 8 0 sosppl 128 20 0 20 5 4 1 1 0 8 1 sockpl 384 1340 0 1321 8 5 3 4 0 8 1 mcl64k 65536 8 0 0 1 0 1 1 0 8 0 mcl16k 16384 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 12 0 0 2 0 2 2 0 8 0 mcl9k 9216 10 0 0 1 0 1 1 0 8 0 mcl8k 8192 9 0 0 2 0 2 2 0 8 0 mcl4k 4096 12 0 0 2 0 2 2 0 8 0 mcl2k2 2112 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 189 0 0 23 0 23 23 0 8 0 mtagpl 80 20 0 0 1 0 1 1 0 8 0 mbufpl 256 219 0 0 14 0 14 14 0 8 0 bufpl 256 9108 0 2079 440 0 440 440 0 8 0 anonpl 16 160656 0 148613 94 30 64 65 0 125 14 amapchunkpl 152 10203 0 10083 23 13 10 10 0 158 5 amappl16 192 8098 0 7434 61 20 41 45 0 8 7 amappl15 184 10 0 9 1 0 1 1 0 8 0 amappl14 176 302 0 296 1 0 1 1 0 8 0 amappl13 168 474 0 474 3 2 1 1 0 8 1 amappl12 160 277 0 273 1 0 1 1 0 8 0 amappl11 152 65 0 50 1 0 1 1 0 8 0 amappl10 144 598 0 591 1 0 1 1 0 8 0 amappl9 136 633 0 630 1 0 1 1 0 8 0 amappl8 128 189 0 165 1 0 1 1 0 8 0 amappl7 120 553 0 547 1 0 1 1 0 8 0 amappl6 112 61 0 52 1 0 1 1 0 8 0 amappl5 104 431 0 414 1 0 1 1 0 8 0 amappl4 96 2238 0 2206 2 1 1 2 0 8 0 amappl3 88 745 0 733 1 0 1 1 0 8 0 amappl2 80 12933 0 12853 3 1 2 3 0 8 0 amappl1 72 47394 0 46938 26 16 10 20 0 8 0 amappl 80 5344 0 5301 1 0 1 1 0 84 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma64 64 259 0 259 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 17 0 17 1 1 0 1 0 8 0 aobjpl 64 76 0 3 2 0 2 2 0 8 0 uaddrrnd 24 1749 0 1732 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1749 0 1732 1 0 1 1 0 8 0 vmmpekpl 168 18379 0 18349 2 0 2 2 0 8 0 vmmpepl 168 217451 0 215542 138 45 93 102 0 357 10 vmsppl 368 1748 0 1732 2 0 2 2 0 8 0 pdppl 4096 3506 0 3464 6 0 6 6 0 8 0 pvpl 32 465480 0 449654 205 45 160 161 0 265 32 pmappl 232 1748 0 1732 2 1 1 2 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 610 0 6 18 0 18 18 0 8 0