panic: kernel diagnostic assertion "uvm_page_owner_locked_p(pg, TRUE)" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_page.c", line 1249 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 523212 63577 73 0x1100010 0 1K syslogd *323470 88960 0 0x14000 0x200 0 reaper db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83461f74) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff8340b5e6,ffffffff833a1f75,4e1,ffffffff8337a979) at __assert+0x29 sys/kern/subr_prf.c:-1 uvm_pageunwire(fffffd8008e88b18) at uvm_pageunwire+0x1dd sys/uvm/uvm_page.c:1249 uvm_fault_unwire_locked(fffffd806bd25980,afae646000,afaea45000) at uvm_fault_unwire_locked+0x34f sys/uvm/uvm_fault.c:1834 uvm_unmap_kill_entry_withlock(fffffd806bd25980,fffffd8067875ee0,0) at uvm_unmap_kill_entry_withlock+0x81 sys/uvm/uvm_map.c:1860 uvm_map_teardown(fffffd806bd25980) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] uvm_map_teardown(fffffd806bd25980) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2486 uvmspace_free(fffffd806bd25980) at uvmspace_free+0xcd sys/uvm/uvm_map.c:3420 reaper(ffff8000ffffd1f8) at reaper+0x22d sys/kern/kern_exit.c:481 end trace frame: 0x0, count: 6 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 *cpu0: kernel diagnostic assertion "uvm_page_owner_locked_p(pg, TRUE)" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_page.c", line 1249 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83461f74) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff8340b5e6,ffffffff833a1f75,4e1,ffffffff8337a979) at __assert+0x29 sys/kern/subr_prf.c:-1 uvm_pageunwire(fffffd8008e88b18) at uvm_pageunwire+0x1dd sys/uvm/uvm_page.c:1249 uvm_fault_unwire_locked(fffffd806bd25980,afae646000,afaea45000) at uvm_fault_unwire_locked+0x34f sys/uvm/uvm_fault.c:1834 uvm_unmap_kill_entry_withlock(fffffd806bd25980,fffffd8067875ee0,0) at uvm_unmap_kill_entry_withlock+0x81 sys/uvm/uvm_map.c:1860 uvm_map_teardown(fffffd806bd25980) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] uvm_map_teardown(fffffd806bd25980) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2486 uvmspace_free(fffffd806bd25980) at uvmspace_free+0xcd sys/uvm/uvm_map.c:3420 reaper(ffff8000ffffd1f8) at reaper+0x22d sys/kern/kern_exit.c:481 end trace frame: 0x0, count: -9 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a23fd20 rbx 0xffffffff83821dcf cpu_info_full_primary+0x2dcf rdx 0 rcx 0xffff8000ffffd1f8 rax 0xffffffff83820ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x6b0242fb8b819004 r11 0x7028122b3b9f7340 r12 0xffffffff83821bd0 cpu_info_full_primary+0x2bd0 r13 0 r14 0 r15 0x1 rip 0xffffffff832db845 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a23fd10 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (reaper) tid=323470 pid=88960 tcnt=1 stat=onproc flags process=14000 proc=200 runpri=86, usrpri=86, slppri=4, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffffd718,0xffff8000ffffcce8 process=0xffff8000ffff6110 user=0xffff80002a23b000, vmspace=0xffffffff839ba7e0 estcpu=36, cpticks=49, pctcpu=15.38, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 73491 90910 0 0 3 0x14200 bored sosplice 89995 336966 52506 0 3 0x100082 sbwait arp 52506 334480 35198 0 3 0x10008a sigsusp sh 39157 440066 11576 0 3 0x82 wait syz-executor 72924 377915 11576 0 3 0x82 wait syz-executor 35198 100938 11576 0 3 0x82 wait syz-executor 1428 136199 11576 0 3 0x82 wait syz-executor 96874 460086 11576 0 3 0x82 wait syz-executor 19585 420809 11576 0 3 0x82 wait syz-executor 21127 270668 11576 0 3 0x82 wait syz-executor 11576 330858 12366 0 3 0x82 wait syz-executor 12366 364148 67147 0 3 0x10008a sigsusp ksh 67147 222023 75854 0 3 0x98 kqread sshd-session 75854 197982 12759 0 3 0x92 kqread sshd-session 86372 288301 1 0 3 0x100083 ttyin getty 12759 419062 1 0 3 0x88 kqread sshd 86120 123767 9519 74 3 0x1100092 bpf pflogd 9519 475339 1 0 3 0x80 sbwait pflogd 63577 523212 77396 73 7 0x1100010 syslogd 77396 25457 1 0 3 0x100082 sbwait syslogd 39584 158359 1 0 3 0x100080 kqread resolvd 81910 332947 64950 77 3 0x100092 kqread dhcpleased 416 231566 64950 77 3 0x100092 kqread dhcpleased 64950 160194 1 0 3 0x80 kqread dhcpleased 29113 37672 0 0 3 0x14200 bored smr 32724 466191 0 0 3 0x14200 pgzero zerothread 73412 13930 0 0 3 0x14200 aiodoned aiodoned 67520 413629 0 0 3 0x14200 syncer update 85958 330350 0 0 3 0x14200 cleaner cleaner *88960 323470 0 0 7 0x14200 reaper 41904 405195 0 0 3 0x14200 pgdaemon pagedaemon 73981 17372 0 0 3 0x14200 bored viomb 34871 319981 0 0 3 0x40014200 acpi0 acpi0 52554 259759 0 0 3 0x40014200 idle1 9773 26417 0 0 3 0x14200 bored softnet3 3554 155784 0 0 3 0x14200 bored softnet2 5814 242420 0 0 3 0x14200 bored softnet1 61668 296563 0 0 3 0x14200 bored softnet0 15625 392019 0 0 3 0x14200 bored systqmp 12379 22035 0 0 3 0x14200 bored systq 81439 305526 0 0 3 0x14200 tmoslp softclockmp 36941 103897 0 0 3 0x40014200 tmoslp softclock 52604 454233 0 0 3 0x40014200 idle0 1 247602 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &uvm.pageqlock r = 0 (0xffffffff8397d1c8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x178 sys/kern/kern_lock.c:-1 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 uvm_fault_unwire_locked+0x33e sys/uvm/uvm_fault.c:1833 #4 uvm_unmap_kill_entry_withlock+0x81 sys/uvm/uvm_map.c:1860 #5 uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] #5 uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2486 #6 uvmspace_free+0xcd sys/uvm/uvm_map.c:3420 #7 reaper+0x22d sys/kern/kern_exit.c:481 #8 proc_trampoline+0x10 Process 88960 (reaper) thread 0xffff8000ffffd1f8 (323470) exclusive rwlock uobjlk r = 0 (0xfffffd806bed7228) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 uvm_fault_unwire_locked+0x25d sys/uvm/uvm_fault.c:1818 #3 uvm_unmap_kill_entry_withlock+0x81 sys/uvm/uvm_map.c:1860 #4 uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] #4 uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2486 #5 uvmspace_free+0xcd sys/uvm/uvm_map.c:3420 #6 reaper+0x22d sys/kern/kern_exit.c:481 #7 proc_trampoline+0x10 exclusive rwlock vmmaplk r = 0 (0xfffffd806bd25a80) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5250 #3 uvm_map_teardown+0x5e sys/uvm/uvm_map.c:2480 #4 uvmspace_free+0xcd sys/uvm/uvm_map.c:3420 #5 reaper+0x22d sys/kern/kern_exit.c:481 #6 proc_trampoline+0x10 exclusive mutex &uvm.pageqlock r = 0 (0xffffffff8397d1c8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x178 sys/kern/kern_lock.c:-1 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 uvm_fault_unwire_locked+0x33e sys/uvm/uvm_fault.c:1833 #4 uvm_unmap_kill_entry_withlock+0x81 sys/uvm/uvm_map.c:1860 #5 uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] #5 uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2486 #6 uvmspace_free+0xcd sys/uvm/uvm_map.c:3420 #7 reaper+0x22d sys/kern/kern_exit.c:481 #8 proc_trampoline+0x10 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10189 11019K 11215K 166960K 11316 0 pcb 17 12K 12K 166960K 29 0 rtable 196 5K 6K 166960K 327 0 pf 32 17K 18K 166960K 45 0 ifaddr 37 6K 7K 166960K 43 0 ifgroup 51 2K 2K 166960K 55 0 sysctl 3 1K 9K 166960K 7 0 counters 64 36K 36K 166960K 66 0 ioctlops 0 0K 4K 166960K 1486 0 iov 0 0K 16K 166960K 5 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1339 84K 84K 166960K 1377 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 4 0 VM map 2 1K 1K 166960K 2 0 sem 2 0K 0K 166960K 2 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 11 37K 93K 166960K 176 0 proc 71 91K 127K 166960K 527 0 subproc 63 3K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 5 0 in_multi 78 5K 6K 166960K 90 0 ether_multi 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 43 201K 201K 166960K 43 0 exec 0 0K 1K 166960K 366 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 257 156K 160K 166960K 3284 0 UVM aobj 3 2K 2K 166960K 3 0 pinsyscall 37 74K 103K 166960K 1245 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 1 0 NDP 11 0K 1K 166960K 26 0 temp 34 8662K 8734K 166960K 14892 0 kqueue 13 20K 32K 166960K 35 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 35 0 31 1 0 1 1 0 8 0 rtentry 176 103 0 12 5 0 5 5 0 8 0 unpcb 144 60 0 43 1 0 1 1 0 8 0 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 808 18 0 14 1 0 1 1 0 8 0 arp 128 17 0 2 1 0 1 1 0 8 0 inpcb 384 99 0 92 2 1 1 2 0 8 0 nd6 144 21 0 3 1 0 1 1 0 8 0 kcovpl 48 8 0 1 1 0 1 1 0 8 0 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 pfstitem 24 24 0 16 1 0 1 1 0 8 0 pfstkey 128 24 0 16 1 0 1 1 0 8 0 pfstate 384 24 0 16 3 0 3 3 0 8 1 pfrule 1344 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 256 412 0 44 26 0 26 26 0 8 2 art_table 32 413 0 44 4 0 4 4 0 8 0 art_node 16 102 0 19 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 2 1 1 0 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1624 0 110 95 0 95 95 0 8 0 ffsino 288 1624 0 110 109 0 109 109 0 8 0 nchpl 144 1883 0 190 63 0 63 63 0 8 0 uvmvnodes 80 1727 0 0 36 0 36 36 0 8 0 vnodes 216 1727 0 0 96 0 96 96 0 8 0 namei 1024 5707 0 5707 2 2 0 2 0 8 0 percpumem 16 48 0 1 1 0 1 1 0 8 0 kstatmem 264 26 0 2 2 0 2 2 0 8 0 scxspl 216 10488 0 10487 10 8 2 8 1 8 1 plimitpl 152 30 0 12 1 0 1 1 0 8 0 sigapl 424 475 0 423 7 0 7 7 0 8 0 knotepl 120 542 0 0 17 0 17 17 0 8 0 kqueuepl 224 98 0 89 5 4 1 5 0 8 0 pipepl 336 105 0 78 3 0 3 3 0 8 0 fdescpl 520 456 0 431 3 0 3 3 0 8 0 filepl 160 1816 0 1620 12 3 9 12 0 8 0 lockfpl 104 30 0 28 1 0 1 1 0 8 0 lockfspl 48 11 0 9 1 0 1 1 0 8 0 sessionpl 144 22 0 13 1 0 1 1 0 8 0 pgrppl 48 34 0 17 1 0 1 1 0 8 0 ucredpl 104 83 0 69 1 0 1 1 0 8 0 zombiepl 144 431 0 423 1 0 1 1 0 8 0 processpl 1208 475 0 423 5 0 5 5 0 8 0 procpl 656 555 0 488 6 0 6 6 0 8 0 sosppl 168 2 0 2 1 1 0 1 0 8 0 sockpl 728 195 0 167 4 1 3 4 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 115 0 0 15 0 15 15 0 8 0 mcl2k 2048 35 0 0 5 0 5 5 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 190 0 0 12 0 12 12 0 8 0 bufpl 280 5053 0 119 353 0 353 353 0 8 0 anonpl 32 10469 0 0 85 0 85 85 0 246 0 amapchunkpl 152 9855 0 9042 36 4 32 36 0 158 0 amappl16 200 2012 0 1988 5 3 2 5 0 8 0 amappl15 192 10 0 9 1 0 1 1 0 8 0 amappl14 184 122 0 109 1 0 1 1 0 8 0 amappl13 176 6 0 6 1 1 0 1 0 8 0 amappl12 168 1097 0 1063 3 1 2 2 0 8 0 amappl11 160 51 0 37 1 0 1 1 0 8 0 amappl10 152 2 0 2 1 1 0 1 0 8 0 amappl9 144 246 0 246 1 1 0 1 0 8 0 amappl8 136 23 0 21 1 0 1 1 0 8 0 amappl7 128 107 0 94 1 0 1 1 0 8 0 amappl6 120 170 0 166 1 0 1 1 0 8 0 amappl5 112 142 0 132 1 0 1 1 0 8 0 amappl4 104 310 0 290 1 0 1 1 0 8 0 amappl3 96 1548 0 1424 4 0 4 4 0 8 0 amappl2 88 619 0 555 2 0 2 2 0 8 0 amappl1 80 8337 0 7696 15 1 14 15 0 8 0 amappl 88 2613 0 2432 5 0 5 5 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 456 0 423 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 456 0 423 1 0 1 1 0 8 0 vmmpekpl 168 5446 0 5403 2 0 2 2 0 8 0 vmmpepl 168 35715 0 33657 91 1 90 91 0 357 0 vmsppl 480 455 0 423 5 0 5 5 0 8 0 rwobjpl 72 14499 0 11781 50 0 50 50 0 8 0 pdppl 4096 920 0 846 100 26 74 86 0 8 0 pvpl 32 32110 0 0 259 0 259 259 0 265 0 pmappl 256 455 0 423 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 380 0 31 11 0 11 11 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83461f74) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff8340b5e6,ffffffff833a1f75,4e1,ffffffff8337a979) at __assert+0x29 sys/kern/subr_prf.c:-1 uvm_pageunwire(fffffd8008e88b18) at uvm_pageunwire+0x1dd sys/uvm/uvm_page.c:1249 uvm_fault_unwire_locked(fffffd806bd25980,afae646000,afaea45000) at uvm_fault_unwire_locked+0x34f sys/uvm/uvm_fault.c:1834 uvm_unmap_kill_entry_withlock(fffffd806bd25980,fffffd8067875ee0,0) at uvm_unmap_kill_entry_withlock+0x81 sys/uvm/uvm_map.c:1860 uvm_map_teardown(fffffd806bd25980) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] uvm_map_teardown(fffffd806bd25980) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2486 uvmspace_free(fffffd806bd25980) at uvmspace_free+0xcd sys/uvm/uvm_map.c:3420 reaper(ffff8000ffffd1f8) at reaper+0x22d sys/kern/kern_exit.c:481 end trace frame: 0x0, count: -9 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:153 _kernel_lock_held() at _kernel_lock_held+0x20 sys/kern/kern_lock.c:76 tsleep(fffffd806e26b790,11,ffffffff8341499b,0) at tsleep+0xcf sys/kern/kern_synch.c:124 vwaitforio(fffffd806e26b710,0,ffffffff8341499b,ffffffffffffffff) at vwaitforio+0xd2 sys/kern/vfs_subr.c:-1 ffs_fsync(ffff80002a2c68d0) at ffs_fsync+0x376 sys/ufs/ffs/ffs_vnops.c:482 VOP_FSYNC(fffffd806e26b710,fffffd807f7d3b60,1,ffff8000ffff3720) at VOP_FSYNC+0x108 sys/kern/vfs_vops.c:311 sys_fsync(ffff8000ffff3720,ffff80002a2c6a80,ffff80002a2c69d0) at sys_fsync+0x16f sys/kern/vfs_syscalls.c:2936 syscall(ffff80002a2c6a80) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2c6a80) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x71137c01f1a0, count: 3 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:153 _kernel_lock_held() at _kernel_lock_held+0x20 sys/kern/kern_lock.c:76 tsleep(fffffd806e26b790,11,ffffffff8341499b,0) at tsleep+0xcf sys/kern/kern_synch.c:124 vwaitforio(fffffd806e26b710,0,ffffffff8341499b,ffffffffffffffff) at vwaitforio+0xd2 sys/kern/vfs_subr.c:-1 ffs_fsync(ffff80002a2c68d0) at ffs_fsync+0x376 sys/ufs/ffs/ffs_vnops.c:482 VOP_FSYNC(fffffd806e26b710,fffffd807f7d3b60,1,ffff8000ffff3720) at VOP_FSYNC+0x108 sys/kern/vfs_vops.c:311 sys_fsync(ffff8000ffff3720,ffff80002a2c6a80,ffff80002a2c69d0) at sys_fsync+0x16f sys/kern/vfs_syscalls.c:2936 syscall(ffff80002a2c6a80) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2c6a80) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x71137c01f1a0, count: -12