panic: pool_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd806f280e00+24 0xed42ac58991b8d66!=0xed42acd8f292b566 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 454765 22395 0 0x2 0x4000000 0K syz-fuzzer *311214 11482 0 0x12 0 1 sshd db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8240e744) at panic+0x164 sys/kern/subr_prf.c:218 pool_cache_get(ffffffff828d47c8) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff828d47c8) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff828d47c8,1) at pool_get+0x91 sys/kern/subr_pool.c:572 m_gethdr(1,1) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283 m_getuio(ffff800020e24a48,0,4d00,ffff800020e24bc8) at m_getuio+0xe4 sys/kern/uipc_socket.c:587 sosend(fffffd806eaf5c88,0,ffff800020e24bc8,0,0,80) at sosend+0x54e sys/kern/uipc_socket.c:542 dofilewritev(ffff8000fffffb38,4,ffff800020e24bc8,0,ffff800020e24cb0) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff8000fffffb38,ffff800020e24c60,ffff800020e24cb0) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e24d30) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e24d30) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffddd10, count: 4 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic pool_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd806f280e00+24 0xed42ac58991b8d66!=0xed42acd8f292b566 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8240e744) at panic+0x164 sys/kern/subr_prf.c:218 pool_cache_get(ffffffff828d47c8) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff828d47c8) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff828d47c8,1) at pool_get+0x91 sys/kern/subr_pool.c:572 m_gethdr(1,1) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283 m_getuio(ffff800020e24a48,0,4d00,ffff800020e24bc8) at m_getuio+0xe4 sys/kern/uipc_socket.c:587 sosend(fffffd806eaf5c88,0,ffff800020e24bc8,0,0,80) at sosend+0x54e sys/kern/uipc_socket.c:542 dofilewritev(ffff8000fffffb38,4,ffff800020e24bc8,0,ffff800020e24cb0) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff8000fffffb38,ffff800020e24c60,ffff800020e24cb0) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e24d30) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e24d30) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffddd10, count: -11 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020e24770 rbx 0xffff800020e24820 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffff800020e24730 r9 0xffffffff8167b47f kprintf+0x16f r10 0x1 r11 0x7a250d2a514dfbaf r12 0x3000000008 r13 0xffff800020e24780 r14 0x100 r15 0x1 rip 0xffffffff8215e708 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020e24760 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (sshd) pid=311214 stat=onproc flags process=12 proc=0 pri=50, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffffe9f0,0xffff8000ffffe510 process=0xffff8000ffffcbd0 user=0xffff800020e1f000, vmspace=0xfffffd806e8fe458 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 95943 43778 0 0 3 0x14200 bored sosplice 69938 493859 22395 0 2 0x2 syz-executor.1 93445 435428 22395 0 2 0x2 syz-executor.0 22395 174015 26599 0 3 0x82 thrsleep syz-fuzzer 22395 368548 26599 0 3 0x4000082 nanosleep syz-fuzzer 22395 74592 26599 0 3 0x4000082 thrsleep syz-fuzzer 22395 454765 26599 0 7 0x4000002 syz-fuzzer 22395 462166 26599 0 3 0x4000082 thrsleep syz-fuzzer 22395 510766 26599 0 3 0x4000082 thrsleep syz-fuzzer 22395 294079 26599 0 3 0x4000082 nanosleep syz-fuzzer 22395 499931 26599 0 3 0x4000082 thrsleep syz-fuzzer 26599 5631 11482 0 3 0x10008a pause ksh *11482 311214 64561 0 7 0x12 sshd 23092 221031 1 0 3 0x100083 ttyin getty 64561 455571 1 0 3 0x80 select sshd 92115 486209 54396 74 3 0x100092 bpf pflogd 54396 28942 1 0 3 0x80 netio pflogd 26731 211462 84206 73 3 0x100090 kqread syslogd 84206 115434 1 0 3 0x100082 netio syslogd 97035 112500 1 77 3 0x100090 poll dhclient 89852 244779 1 0 3 0x80 poll dhclient 99915 441741 0 0 3 0x14200 bored smr 25358 415657 0 0 3 0x14200 pgzero zerothread 4002 88137 0 0 3 0x14200 aiodoned aiodoned 95264 55276 0 0 3 0x14200 syncer update 24091 183409 0 0 3 0x14200 cleaner cleaner 65074 128282 0 0 3 0x14200 reaper reaper 33446 229764 0 0 3 0x14200 pgdaemon pagedaemon 53249 51594 0 0 3 0x14200 bored crynlk 57031 89894 0 0 3 0x14200 bored crypto 58790 28423 0 0 3 0x40014200 acpi0 acpi0 3077 108242 0 0 3 0x40014200 idle1 85067 184884 0 0 3 0x14200 bored softnet 23988 468070 0 0 3 0x14200 bored systqmp 20118 187369 0 0 3 0x14200 bored systq 12197 85763 0 0 3 0x40014200 bored softclock 1810 84077 0 0 3 0x40014200 idle0 1 256275 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 69938 (syz-executor.1) thread 0xffff800020ea1650 (493859) exclusive rrwlock inode r = 0 (0xfffffd807d7d33c8) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462 #3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:603 #4 vn_lock+0x81 sys/kern/vfs_vnops.c:575 #5 vget+0x1c8 sys/kern/vfs_subr.c:671 #6 ufs_ihashget+0x141 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x74 sys/ufs/ffs/ffs_vfsops.c:1329 #8 ufs_lookup+0x14b7 sys/ufs/ufs/ufs_lookup.c:487 #9 VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:90 #10 vfs_lookup+0x7a6 sys/kern/vfs_lookup.c:568 #11 namei+0x63c sys/kern/vfs_lookup.c:249 #12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1853 #13 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #13 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd807d7d3808) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462 #3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:603 #4 vn_lock+0x81 sys/kern/vfs_vnops.c:575 #5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419 #6 namei+0x63c sys/kern/vfs_lookup.c:249 #7 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1853 #8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9484 6402K 6658K 78643K 10613 0 pcb 13 8K 8K 78643K 27 0 rtable 108 3K 7K 78643K 258 0 ifaddr 55 12K 13K 78643K 69 0 counters 43 33K 33K 78643K 43 0 ioctlops 0 0K 4K 78643K 1473 0 iov 0 0K 2K 78643K 52 0 mount 1 1K 1K 78643K 1 0 vnodes 1217 77K 77K 78643K 1233 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 1K 78643K 2 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 15 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 4 9K 25K 78643K 74 0 proc 60 63K 83K 78643K 439 0 subproc 32 2K 2K 78643K 34 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 2 0 in_multi 40 2K 2K 78643K 40 0 ether_multi 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 31 148K 148K 78643K 31 0 exec 0 0K 1K 78643K 207 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 155 26K 26K 78643K 1186 0 UVM aobj 3 2K 2K 78643K 3 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 8 0 NDP 8 0K 0K 78643K 12 0 temp 75 3860K 3924K 78643K 2131 0 kqueue 3 4K 8K 78643K 5 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 8 0 1 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 88 23 0 21 1 0 1 1 0 8 0 rtentry 112 49 0 4 2 0 2 2 0 8 0 unpcb 120 52 0 42 1 0 1 1 0 8 0 syncache 272 4 0 4 1 1 0 1 0 8 0 tcpqe 32 251 0 251 1 0 1 1 0 8 1 tcpcb 592 34 0 18 2 0 2 2 0 8 0 inpcb 296 89 0 82 1 0 1 1 0 8 0 nd6 48 6 0 0 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 0 1 1 0 8 1 pffrag 232 2 0 2 1 0 1 1 0 482 1 pffrnode 88 2 0 2 1 0 1 1 0 8 1 pffrent 40 90 0 90 1 0 1 1 0 8 1 pfosfp 40 846 0 423 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfrktable 1344 20 0 20 1 0 1 1 0 8 1 pfstitem 24 15 0 0 1 0 1 1 0 8 0 pfstkey 112 15 0 0 1 0 1 1 0 8 0 pfstate 328 15 0 0 2 0 2 2 0 8 0 pfrule 1360 23 0 18 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 199 0 2 13 0 13 13 0 8 0 art_table 32 200 0 2 2 0 2 2 0 8 0 art_node 16 48 0 7 1 0 1 1 0 8 0 semupl 112 5 0 5 1 0 1 1 0 8 1 semapl 112 11 0 1 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1476 0 73 88 0 88 88 0 8 0 ffsino 272 1476 0 73 94 0 94 94 0 8 0 nchpl 144 1781 0 172 60 0 60 60 0 8 0 uvmvnodes 72 1526 0 0 28 0 28 28 0 8 0 vnodes 208 1526 0 0 81 0 81 81 0 8 0 namei 1024 4646 0 4646 1 0 1 1 0 8 1 percpumem 16 32 0 0 1 0 1 1 0 8 0 pfiaddrpl 120 6 0 6 1 0 1 1 0 8 1 scxspl 200 5149 0 5149 8 1 7 7 0 8 7 plimitpl 152 15 0 7 1 0 1 1 0 8 0 sigapl 424 290 0 259 4 0 4 4 0 8 0 futexpl 56 603 0 603 1 0 1 1 0 8 1 knotepl 112 64 0 44 1 0 1 1 0 8 0 kqueuepl 152 6 0 4 1 0 1 1 0 8 0 pipepl 304 84 0 73 2 0 2 2 0 8 1 fdescpl 496 274 0 259 3 0 3 3 0 8 0 filepl 152 1407 0 1304 5 0 5 5 0 8 1 lockfpl 104 16 0 15 1 0 1 1 0 8 0 lockfspl 48 7 0 6 1 0 1 1 0 8 0 sessionpl 120 18 0 7 1 0 1 1 0 8 0 pgrppl 48 18 0 7 1 0 1 1 0 8 0 ucredpl 96 71 0 62 1 0 1 1 0 8 0 zombiepl 144 259 0 259 1 0 1 1 0 8 1 processpl 1008 290 0 259 5 0 5 5 0 8 0 procpl 632 378 0 340 4 0 4 4 0 8 0 sockpl 400 166 0 147 3 0 3 3 0 8 1 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 247 0 0 30 0 30 30 0 8 0 mtagpl 96 5 0 0 1 0 1 1 0 8 0 mbufpl 256 248 0 0 15 0 15 15 0 8 0 bufpl 280 3354 0 129 231 0 231 231 0 8 0 anonpl 16 42098 0 25630 68 1 67 67 0 124 0 amapchunkpl 152 1504 0 1215 14 0 14 14 0 158 2 amappl16 192 1037 0 276 39 0 39 39 0 8 0 amappl15 184 10 0 8 1 0 1 1 0 8 0 amappl13 168 31 0 26 1 0 1 1 0 8 0 amappl12 160 53 0 47 1 0 1 1 0 8 0 amappl11 152 62 0 46 1 0 1 1 0 8 0 amappl10 144 21 0 17 1 0 1 1 0 8 0 amappl9 136 384 0 381 1 0 1 1 0 8 0 amappl8 128 357 0 322 2 0 2 2 0 8 0 amappl7 120 119 0 106 1 0 1 1 0 8 0 amappl6 112 32 0 27 1 0 1 1 0 8 0 amappl5 104 189 0 174 1 0 1 1 0 8 0 amappl4 96 487 0 459 1 0 1 1 0 8 0 amappl3 88 118 0 108 1 0 1 1 0 8 0 amappl2 80 1236 0 1176 2 0 2 2 0 8 0 amappl1 72 16615 0 16193 24 9 15 18 0 8 5 amappl 80 671 0 595 2 0 2 2 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 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 64 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 274 0 259 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 274 0 259 1 0 1 1 0 8 0 vmmpekpl 168 6219 0 6189 2 0 2 2 0 8 0 vmmpepl 168 41480 0 39624 120 6 114 114 0 357 27 vmsppl 368 273 0 259 2 0 2 2 0 8 0 pdppl 4096 555 0 518 7 1 6 6 0 8 0 pvpl 32 145947 0 126443 164 0 164 164 0 265 3 pmappl 232 273 0 259 2 0 2 2 0 8 1 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 265 0 5 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff82738ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352 x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x6f sys/dev/kcov.c:118 kqueue_sleep(fffffd806e8cada8,ffff800020e83eb0) at kqueue_sleep+0x101 sys/kern/kern_event.c:885 kqueue_scan(fffffd806e8cada8,40,c000049638,ffff800020e83eb0,ffff8000fffff8c0,ffff800020e83efc) at kqueue_scan+0x2b6 sys/kern/kern_event.c:928 sys_kevent(ffff8000fffff8c0,ffff800020e83f70,ffff800020e83fc0) at sys_kevent+0x464 sys/kern/kern_event.c:640 syscall(ffff800020e84040) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e84040) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc000049e38, count: 6 ddb{0}> trace x86_ipi_db(ffffffff82738ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352 x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x6f sys/dev/kcov.c:118 kqueue_sleep(fffffd806e8cada8,ffff800020e83eb0) at kqueue_sleep+0x101 sys/kern/kern_event.c:885 kqueue_scan(fffffd806e8cada8,40,c000049638,ffff800020e83eb0,ffff8000fffff8c0,ffff800020e83efc) at kqueue_scan+0x2b6 sys/kern/kern_event.c:928 sys_kevent(ffff8000fffff8c0,ffff800020e83f70,ffff800020e83fc0) at sys_kevent+0x464 sys/kern/kern_event.c:640 syscall(ffff800020e84040) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e84040) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc000049e38, count: -9 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x18: addq $0x8,%rsp db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8240e744) at panic+0x164 sys/kern/subr_prf.c:218 pool_cache_get(ffffffff828d47c8) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff828d47c8) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff828d47c8,1) at pool_get+0x91 sys/kern/subr_pool.c:572 m_gethdr(1,1) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283 m_getuio(ffff800020e24a48,0,4d00,ffff800020e24bc8) at m_getuio+0xe4 sys/kern/uipc_socket.c:587 sosend(fffffd806eaf5c88,0,ffff800020e24bc8,0,0,80) at sosend+0x54e sys/kern/uipc_socket.c:542 dofilewritev(ffff8000fffffb38,4,ffff800020e24bc8,0,ffff800020e24cb0) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff8000fffffb38,ffff800020e24c60,ffff800020e24cb0) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e24d30) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e24d30) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffddd10, count: 4 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8240e744) at panic+0x164 sys/kern/subr_prf.c:218 pool_cache_get(ffffffff828d47c8) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff828d47c8) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff828d47c8,1) at pool_get+0x91 sys/kern/subr_pool.c:572 m_gethdr(1,1) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283 m_getuio(ffff800020e24a48,0,4d00,ffff800020e24bc8) at m_getuio+0xe4 sys/kern/uipc_socket.c:587 sosend(fffffd806eaf5c88,0,ffff800020e24bc8,0,0,80) at sosend+0x54e sys/kern/uipc_socket.c:542 dofilewritev(ffff8000fffffb38,4,ffff800020e24bc8,0,ffff800020e24cb0) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff8000fffffb38,ffff800020e24c60,ffff800020e24cb0) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e24d30) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e24d30) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffddd10, count: -11