witness: lock order reversal: 1st 0xffffffff82cc8bd0 &sched_lock (&sched_lock) 2nd 0xffff8000295b11e8 &pr->ps_mtx (&pr->ps_mtx) lock order "&pr->ps_mtx"(mutex) -> "&sched_lock"(sched_lock) first seen at: #0 __mp_lock+0xa2 read_rflags machine/cpufunc.h:195 [inline] #0 __mp_lock+0xa2 intr_disable machine/cpufunc.h:216 [inline] #0 __mp_lock+0xa2 sys/kern/kern_lock.c:142 #1 donice+0x178 sys/kern/kern_resource.c:218 #2 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #2 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #3 Xsyscall+0x128 lock order "&sched_lock"(sched_lock) -> "&pr->ps_mtx"(mutex) first seen at: #0 mtx_enter+0x3e sys/kern/kern_lock.c:265 #1 single_thread_set+0x35a single_thread_wait sys/kern/kern_sig.c:2172 [inline] #1 single_thread_set+0x35a sys/kern/kern_sig.c:2155 #2 sigexit+0x90 sys/kern/kern_sig.c:1562 #3 postsig+0x4a9 sys/kern/kern_sig.c:1494 #4 userret+0x16e sys/kern/kern_sig.c:1987 #5 syscall+0x4e7 mi_syscall_return sys/sys/syscall_mi.h:137 [inline] #5 syscall+0x4e7 sys/arch/amd64/amd64/trap.c:644 #6 Xsyscall+0x128 Stopped at db_enter+0x1c: addq $0x8,%rsp ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 witness_checkorder(ffff8000295b11e8,9,0) at witness_checkorder+0x10b7 witness_debugger sys/kern/subr_witness.c:2510 [inline] witness_checkorder(ffff8000295b11e8,9,0) at witness_checkorder+0x10b7 sys/kern/subr_witness.c:1110 mtx_enter(ffff8000295b11d8) at mtx_enter+0x3e sys/kern/kern_lock.c:265 single_thread_set(ffff8000212257e8,0,1) at single_thread_set+0x35a single_thread_wait sys/kern/kern_sig.c:2172 [inline] single_thread_set(ffff8000212257e8,0,1) at single_thread_set+0x35a sys/kern/kern_sig.c:2155 sigexit(ffff8000212257e8,6) at sigexit+0x90 sys/kern/kern_sig.c:1562 postsig(ffff8000212257e8,6,ffff8000246f9a98) at postsig+0x4a9 sys/kern/kern_sig.c:1494 userret(ffff8000212257e8) at userret+0x16e sys/kern/kern_sig.c:1987 syscall(ffff8000246f9bd0) at syscall+0x4e7 mi_syscall_return sys/sys/syscall_mi.h:137 [inline] syscall(ffff8000246f9bd0) at syscall+0x4e7 sys/arch/amd64/amd64/trap.c:644 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x15bad8107c0, count: -9 ddb{0}> show registers rdi 0x3 rsi 0x40000 acpi_pdirpa+0x2be63 rbp 0xffff8000246f97a0 rbx 0x3 rdx 0xffff800000d02700 rcx 0xffff8000212257e8 rax 0x3ffff acpi_pdirpa+0x2be62 r8 0xffff8000246f9710 r9 0x8080808080808080 r10 0xb4378a6654006e54 r11 0xd124f2ae38f58762 r12 0xfffffd8003a0a850 r13 0 r14 0xfffffd80039fea90 r15 0xfffffd80031c7bc0 rip 0xffffffff81b6e27c db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff8000246f9790 ss 0x10 db_enter+0x1c: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.5) pid=228692 stat=onproc flags process=500010 proc=4002000 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800021224ff0,0xffffffff82c90e98 process=0xffff8000295b10d8 user=0xffff8000246f4000, vmspace=0xfffffd807e4c2930 estcpu=1, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 29091 356496 58551 32767 4 0x582010 syz-executor.5 *29091 228692 58551 32767 7 0x4502010 syz-executor.5 1611 151183 10904 32767 2 0x10 syz-executor.2 1611 276376 10904 32767 3 0x4000090 kqread syz-executor.2 1611 492035 10904 32767 3 0x4000090 fsleep syz-executor.2 42647 57619 59676 32767 2 0x10 syz-executor.3 92511 119578 0 0 3 0x14200 bored sosplice 23604 46325 11228 32767 2 0x10 syz-executor.7 58551 42230 69452 32767 3 0xb0 nanoslp syz-executor.5 14357 324171 66748 32767 3 0x90 nanoslp syz-executor.6 11228 477342 71152 0 3 0x82 wait syz-executor.7 59676 219759 57861 32767 3 0x90 nanoslp syz-executor.3 81176 506716 46281 32767 3 0x90 nanoslp syz-executor.4 69452 117733 71152 0 3 0x82 wait syz-executor.5 85119 322496 85827 32767 2 0x10 syz-executor.1 46281 357027 71152 0 3 0x82 wait syz-executor.4 66748 64235 71152 0 3 0x82 wait syz-executor.6 57861 25561 71152 0 3 0x82 wait syz-executor.3 10904 424974 98850 32767 2 0x10 syz-executor.2 98850 100023 71152 0 3 0x82 wait syz-executor.2 92008 439422 8919 32767 3 0x10 biowait syz-executor.0 85827 32205 71152 0 3 0x82 wait syz-executor.1 8919 191855 71152 0 3 0x82 wait syz-executor.0 71152 76147 96692 0 3 0x2000082 wait syz-fuzzer 71152 219075 96692 0 3 0x6000082 nanoslp syz-fuzzer 71152 261285 96692 0 3 0x6000082 wait syz-fuzzer 71152 254583 96692 0 3 0x6000082 thrsleep syz-fuzzer 71152 449353 96692 0 3 0x6000082 wait syz-fuzzer 71152 348231 96692 0 3 0x6000082 wait syz-fuzzer 71152 101231 96692 0 3 0x6000082 wait syz-fuzzer 71152 456865 96692 0 3 0x6000082 thrsleep syz-fuzzer 71152 365057 96692 0 3 0x6000082 wait syz-fuzzer 71152 128462 96692 0 3 0x6000082 thrsleep syz-fuzzer 71152 472502 96692 0 3 0x6000082 wait syz-fuzzer 71152 249257 96692 0 3 0x6000082 wait syz-fuzzer 71152 432203 96692 0 3 0x6000082 thrsleep syz-fuzzer 71152 245133 96692 0 2 0x6000002 syz-fuzzer 71152 506679 96692 0 3 0x6000082 thrsleep syz-fuzzer 71152 86869 96692 0 2 0x6000002 syz-fuzzer 96692 233223 76451 0 3 0x10008a sigsusp ksh 76451 218264 26001 0 3 0x9a kqread sshd 75702 14211 1 0 3 0x100083 ttyin getty 26001 256316 1 0 3 0x88 kqread sshd 74750 394018 60599 73 3 0x1100090 kqread syslogd 60599 222197 1 0 3 0x100082 netio syslogd 25821 33221 1 0 3 0x100080 kqread resolvd 4540 265322 5060 77 3 0x100092 kqread dhcpleased 25195 271054 5060 77 3 0x100092 kqread dhcpleased 5060 51598 1 0 3 0x80 kqread dhcpleased 38275 75157 0 0 3 0x14200 bored smr 29631 191449 0 0 2 0x14200 zerothread 34652 93176 0 0 3 0x14200 aiodoned aiodoned 16168 170999 0 0 3 0x14200 syncer update 29097 244442 0 0 3 0x14200 cleaner cleaner 5192 189183 0 0 3 0x14200 reaper reaper 52714 123332 0 0 3 0x14200 pgdaemon pagedaemon 73429 43845 0 0 3 0x14200 bored viomb 54052 41617 0 0 3 0x40014200 acpi0 acpi0 22562 285774 0 0 3 0x40014200 idle1 83530 468114 0 0 3 0x14200 bored softnet3 97541 88065 0 0 3 0x14200 bored softnet2 34860 189009 0 0 3 0x14200 bored softnet1 76422 135489 0 0 3 0x14200 bored softnet0 80850 55156 0 0 3 0x14200 bored systqmp 92123 173842 0 0 3 0x14200 bored systq 87487 100968 0 0 3 0x40014200 bored softclock 46012 114258 0 0 3 0x40014200 idle0 1 376008 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive sched_lock &sched_lock r = 0 (0xffffffff82cc8bd0) #0 witness_lock+0x447 #1 single_thread_set+0x179 sys/kern/kern_sig.c:2113 #2 sigexit+0x90 sys/kern/kern_sig.c:1562 #3 postsig+0x4a9 sys/kern/kern_sig.c:1494 #4 userret+0x16e sys/kern/kern_sig.c:1987 #5 syscall+0x4e7 mi_syscall_return sys/sys/syscall_mi.h:137 [inline] #5 syscall+0x4e7 sys/arch/amd64/amd64/trap.c:644 #6 Xsyscall+0x128 Process 29091 (syz-executor.5) thread 0xffff8000212257e8 (228692) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82ca0228) #0 witness_lock+0x447 #1 postsig+0x49e sys/kern/kern_sig.c:1500 #2 userret+0x16e sys/kern/kern_sig.c:1987 #3 syscall+0x4e7 mi_syscall_return sys/sys/syscall_mi.h:137 [inline] #3 syscall+0x4e7 sys/arch/amd64/amd64/trap.c:644 #4 Xsyscall+0x128 exclusive sched_lock &sched_lock r = 0 (0xffffffff82cc8bd0) #0 witness_lock+0x447 #1 single_thread_set+0x179 sys/kern/kern_sig.c:2113 #2 sigexit+0x90 sys/kern/kern_sig.c:1562 #3 postsig+0x4a9 sys/kern/kern_sig.c:1494 #4 userret+0x16e sys/kern/kern_sig.c:1987 #5 syscall+0x4e7 mi_syscall_return sys/sys/syscall_mi.h:137 [inline] #5 syscall+0x4e7 sys/arch/amd64/amd64/trap.c:644 #6 Xsyscall+0x128 Process 92008 (syz-executor.0) thread 0xffff8000211f4ab8 (439422) exclusive rrwlock inode r = 0 (0xfffffd807dd881a8) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 ufs_ihashins+0x46 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1343 #6 ffs_inode_alloc+0x1c2 sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_mkdir+0xf8 sys/ufs/ufs/ufs_vnops.c:1149 #8 VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 #9 domkdirat+0x125 sys/kern/vfs_syscalls.c:3073 #10 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #10 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8069c0cc48) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd5 sys/kern/vfs_lookup.c:418 #6 namei+0x55a sys/kern/vfs_lookup.c:250 #7 domkdirat+0x79 sys/kern/vfs_syscalls.c:3058 #8 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #8 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10187 6408K 6420K 78643K 11265 0 pcb 13 8K 8K 78643K 13 0 rtable 238 6K 7K 78643K 490 0 pf 29 8K 8K 78643K 29 0 ifaddr 44 15K 15K 78643K 46 0 ifgroup 50 2K 2K 78643K 50 0 sysctl 2 0K 0K 78643K 2 0 counters 60 35K 35K 78643K 60 0 ioctlops 0 0K 2K 78643K 29 0 iov 0 0K 16K 78643K 18 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1278 80K 80K 78643K 1410 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 11 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 32 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 21 77K 125K 78643K 872 0 sigio 0 0K 0K 78643K 3 0 proc 56 78K 115K 78643K 483 0 subproc 104 6K 6K 78643K 104 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 16 0 in_multi 99 7K 7K 78643K 105 0 ether_multi 1 0K 0K 78643K 1 0 mrt 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 61 281K 281K 78643K 61 0 exec 0 0K 1K 78643K 569 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 8 62K 64K 78643K 10 0 UVM amap 329 85K 97K 78643K 10890 0 UVM aobj 80 3K 3K 78643K 80 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 26 0 NDP 11 0K 2K 78643K 27 0 temp 58 5915K 5979K 78643K 5641 0 kqueue 13 20K 24K 78643K 49 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 42 0 39 1 0 1 1 0 8 0 rtentry 112 115 0 3 4 0 4 4 0 8 0 unpcb 144 391 0 377 7 6 1 3 0 8 0 syncache 304 18 0 18 3 3 0 1 0 8 0 tcpqe 32 180 0 180 2 2 0 1 0 8 0 tcpcb 808 219 0 209 8 6 2 5 0 8 0 arp 120 18 0 0 1 0 1 1 0 8 0 inpcb 368 386 0 373 8 6 2 5 0 8 0 nd6 136 28 0 2 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 475 0 13 30 1 29 30 0 8 0 art_table 32 476 0 13 4 0 4 4 0 8 0 art_node 16 114 0 12 1 0 1 1 0 8 0 sysvmsgpl 40 9 0 9 2 2 0 1 0 8 0 semapl 112 29 0 19 1 0 1 1 0 8 0 shmpl 112 77 0 0 3 0 3 3 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2552 0 1112 91 0 91 91 0 8 0 ffsino 272 2552 0 1112 97 0 97 97 0 8 0 nchpl 144 3863 0 2179 63 0 63 63 0 8 0 uvmvnodes 80 2665 0 0 55 0 55 55 0 8 0 vnodes 216 2665 0 0 149 0 149 149 0 8 0 namei 1024 12909 0 12908 2 1 1 2 0 8 0 percpumem 16 43 0 0 1 0 1 1 0 8 0 kstatmem 264 22 0 0 2 0 2 2 0 8 0 scxspl 216 13835 0 13834 12 9 3 8 1 8 2 plimitpl 152 115 0 92 4 3 1 2 0 8 0 sigapl 424 1167 0 1114 7 0 7 7 0 8 0 futexpl 64 6112 0 6111 1 0 1 1 0 8 0 knotepl 120 113 0 0 4 0 4 4 0 8 0 kqueuepl 216 99 0 89 1 0 1 1 0 8 0 pipepl 320 353 0 325 11 8 3 8 0 8 0 fdescpl 496 1149 0 1117 7 2 5 6 0 8 0 filepl 152 5721 0 5486 19 9 10 15 0 8 0 lockfpl 104 45 0 43 1 0 1 1 0 8 0 lockfspl 48 24 0 22 1 0 1 1 0 8 0 sessionpl 144 23 0 7 1 0 1 1 0 8 0 pgrppl 48 92 0 76 1 0 1 1 0 8 0 ucredpl 104 843 0 825 1 0 1 1 0 8 0 zombiepl 144 1117 0 1114 1 0 1 1 0 8 0 processpl 1072 1167 0 1114 5 1 4 5 0 8 0 procpl 680 2656 0 2585 10 2 8 8 0 8 1 sosppl 168 10 0 10 2 2 0 1 0 8 0 sockpl 488 827 0 797 28 23 5 14 0 8 0 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 6 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 15 0 0 2 0 2 2 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 284 0 0 36 0 36 36 0 8 0 mtagpl 96 5 0 0 1 0 1 1 0 8 0 mbufpl 256 293 0 0 19 0 19 19 0 8 0 bufpl 288 5568 0 143 388 0 388 388 0 8 0 anonpl 24 248306 0 237243 93 22 71 92 0 186 0 amapchunkpl 152 35519 0 34688 49 9 40 44 0 158 3 amappl16 200 6359 0 6086 28 12 16 27 0 8 1 amappl15 192 11 0 11 1 1 0 1 0 8 0 amappl14 184 198 0 185 2 1 1 2 0 8 0 amappl13 176 15 0 15 1 1 0 1 0 8 0 amappl12 168 1769 0 1735 2 0 2 2 0 8 0 amappl11 160 54 0 43 1 0 1 1 0 8 0 amappl10 152 22 0 13 1 0 1 1 0 8 0 amappl9 144 251 0 250 2 1 1 1 0 8 0 amappl8 136 294 0 233 3 0 3 3 0 8 0 amappl7 128 66 0 52 2 1 1 2 0 8 0 amappl6 120 211 0 196 2 1 1 2 0 8 0 amappl5 112 256 0 247 1 0 1 1 0 8 0 amappl4 104 573 0 534 3 1 2 3 0 8 0 amappl3 96 7007 0 6928 3 0 3 3 0 8 0 amappl2 88 1417 0 1350 3 1 2 3 0 8 0 amappl1 80 12308 0 11787 22 9 13 22 0 8 0 amappl 88 10382 0 10157 7 0 7 7 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 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 79 0 0 2 0 2 2 0 8 0 uaddrrnd 24 1149 0 1117 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1149 0 1117 1 0 1 1 0 8 0 vmmpekpl 168 15474 0 15415 3 0 3 3 0 8 0 vmmpepl 168 88063 0 85892 131 23 108 124 0 357 5 vmsppl 464 1148 0 1117 7 2 5 6 0 8 0 rwobjpl 56 31453 0 27451 60 2 58 58 0 8 0 pdppl 4096 2306 0 2234 148 66 82 96 0 8 10 pvpl 32 569840 0 553012 363 90 273 363 0 265 128 pmappl 248 1148 0 1117 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 851 0 84 22 0 22 22 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 witness_checkorder(ffff8000295b11e8,9,0) at witness_checkorder+0x10b7 witness_debugger sys/kern/subr_witness.c:2510 [inline] witness_checkorder(ffff8000295b11e8,9,0) at witness_checkorder+0x10b7 sys/kern/subr_witness.c:1110 mtx_enter(ffff8000295b11d8) at mtx_enter+0x3e sys/kern/kern_lock.c:265 single_thread_set(ffff8000212257e8,0,1) at single_thread_set+0x35a single_thread_wait sys/kern/kern_sig.c:2172 [inline] single_thread_set(ffff8000212257e8,0,1) at single_thread_set+0x35a sys/kern/kern_sig.c:2155 sigexit(ffff8000212257e8,6) at sigexit+0x90 sys/kern/kern_sig.c:1562 postsig(ffff8000212257e8,6,ffff8000246f9a98) at postsig+0x4a9 sys/kern/kern_sig.c:1494 userret(ffff8000212257e8) at userret+0x16e sys/kern/kern_sig.c:1987 syscall(ffff8000246f9bd0) at syscall+0x4e7 mi_syscall_return sys/sys/syscall_mi.h:137 [inline] syscall(ffff8000246f9bd0) at syscall+0x4e7 sys/arch/amd64/amd64/trap.c:644 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x15bad8107c0, count: -9 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff800020d58ff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x30 kd_curproc sys/dev/kcov.c:590 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x30 sys/dev/kcov.c:158 __mp_lock(ffffffff82cc89c8) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82cc89c8) at __mp_lock+0x133 sys/kern/kern_lock.c:147 sleep_finish(2,1) at sleep_finish+0x142 sys/kern/kern_synch.c:398 sys_nanosleep(ffff8000212247f8,ffff8000295b9900,ffff8000295b9950) at sys_nanosleep+0x1f5 sys/kern/kern_time.c:297 syscall(ffff8000295b99d0) at syscall+0x606 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff8000295b99d0) at syscall+0x606 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b8a85843d70, count: -9