uvm_fault(0xffffffff82e454c0, 0xffff800029232004, 0, 1) -> d kernel: page fault trap, code=0 Stopped at ufs_lookup+0x4d0: movzwl 0x4(%r15,%r12,1),%ebx TID PID UID PRFLAGS PFLAGS CPU COMMAND 392222 25210 0 0 0 1 syz-executor.3 *251218 17790 0 0x2 0 0K syz-executor.0 ufs_lookup() at ufs_lookup+0x4d0 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffd8062c397c8,ffff800037375eb8,ffff800037375ee8) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 vfs_lookup(ffff800037375e88) at vfs_lookup+0x6e2 sys/kern/vfs_lookup.c:566 namei(ffff800037375e88) at namei+0x55a sys/kern/vfs_lookup.c:250 dounlinkat(ffff80002a22e548,ffffff9c,7cbc1ab731a0,8) at dounlinkat+0x9d sys/kern/vfs_syscalls.c:1847 syscall(ffff800037376060) at syscall+0x533 mi_syscall sys/sys/syscall_mi.h:183 [inline] syscall(ffff800037376060) at syscall+0x533 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7cbc1ab73190, count: 8 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: uvm_fault(0xffffffff82e454c0, 0xffff800029232004, 0, 1) -> d ddb{0}> trace ufs_lookup() at ufs_lookup+0x4d0 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffd8062c397c8,ffff800037375eb8,ffff800037375ee8) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 vfs_lookup(ffff800037375e88) at vfs_lookup+0x6e2 sys/kern/vfs_lookup.c:566 namei(ffff800037375e88) at namei+0x55a sys/kern/vfs_lookup.c:250 dounlinkat(ffff80002a22e548,ffffff9c,7cbc1ab731a0,8) at dounlinkat+0x9d sys/kern/vfs_syscalls.c:1847 syscall(ffff800037376060) at syscall+0x533 mi_syscall sys/sys/syscall_mi.h:183 [inline] syscall(ffff800037376060) at syscall+0x533 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7cbc1ab73190, count: -7 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff800037375cc0 rbx 0 rdx 0 rcx 0 rax 0xfffffd8062b5a4a0 r8 0xffffffffffffffff r9 0xfffffd807f7d7548 r10 0xde0f07bb494d70ff r11 0xa513af04fc69c5d6 r12 0 r13 0xffffffff r14 0 r15 0xffff800029232000 rip 0xffffffff825121a0 ufs_lookup+0x4d0 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800037375bc0 ss 0x10 ufs_lookup+0x4d0: movzwl 0x4(%r15,%r12,1),%ebx ddb{0}> show proc PROC (syz-executor.0) tid=251218 pid=17790 tcnt=1 stat=onproc flags process=2 proc=0 runpri=84, usrpri=84, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff80002a1727f8,0xffff80002a212d48 process=0xffff8000ffff39c8 user=0xffff800037371000, vmspace=0xfffffd80631c4aa8 estcpu=36, cpticks=2, pctcpu=0.3, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 25210 392222 60761 0 7 0 syz-executor.3 31302 40104 26116 0 3 0x80 nanoslp syz-executor.4 31302 394323 26116 0 3 0x4000080 fsleep syz-executor.4 31302 381385 26116 0 3 0x4000080 fsleep syz-executor.4 99751 362288 89162 0 2 0x480 syz-executor.1 99751 471889 89162 0 3 0x4000080 ttyout syz-executor.1 99751 74365 89162 0 3 0x4000080 fsleep syz-executor.1 8465 514651 36353 0 2 0 syz-executor.7 8465 204252 36353 0 3 0x4000080 lockf syz-executor.7 8465 168997 36353 0 3 0x4000080 lockf syz-executor.7 8465 520122 36353 0 3 0x4000080 lockf syz-executor.7 *17790 251218 87860 0 7 0x2 syz-executor.0 26116 387897 87860 0 2 0x482 syz-executor.4 92873 248129 87860 0 2 0x482 syz-executor.5 87485 286572 0 0 3 0x14200 bored sosplice 21421 350806 0 0 3 0x14280 nfsidl nfsio 35149 253559 0 0 3 0x14280 nfsidl nfsio 43412 38292 0 0 3 0x14280 nfsidl nfsio 247 96763 0 0 3 0x14280 nfsidl nfsio 5821 408288 0 0 3 0x14280 nfsidl nfsio 36353 178550 87860 0 3 0x82 nanoslp syz-executor.7 45115 444994 87860 0 2 0x482 syz-executor.6 60761 333869 87860 0 2 0x482 syz-executor.3 71116 233356 87860 0 2 0x482 syz-executor.2 89162 217316 87860 0 3 0x82 nanoslp syz-executor.1 87860 207895 85917 0 3 0x2000082 thrsleep syz-fuzzer 87860 366141 85917 0 3 0x6000082 nanoslp syz-fuzzer 87860 136393 85917 0 3 0x6000082 thrsleep syz-fuzzer 87860 123289 85917 0 3 0x6000082 wait syz-fuzzer 87860 439005 85917 0 3 0x6000082 thrsleep syz-fuzzer 87860 247569 85917 0 3 0x6000082 wait syz-fuzzer 87860 271919 85917 0 3 0x6000082 wait syz-fuzzer 87860 251764 85917 0 3 0x6000082 wait syz-fuzzer 87860 466764 85917 0 3 0x6000082 wait syz-fuzzer 87860 350974 85917 0 3 0x6000082 wait syz-fuzzer 87860 500593 85917 0 3 0x6000082 thrsleep syz-fuzzer 87860 213020 85917 0 3 0x6000082 wait syz-fuzzer 87860 131880 85917 0 3 0x6000082 wait syz-fuzzer 87860 7925 85917 0 3 0x6000082 kqread syz-fuzzer 87860 85236 85917 0 3 0x6000082 thrsleep syz-fuzzer 87860 339202 85917 0 3 0x6000082 thrsleep syz-fuzzer 85917 468551 64056 0 3 0x10008a sigsusp ksh 64056 179844 86303 0 3 0x9a kqread sshd 55298 208122 1 0 3 0x100083 ttyin getty 86303 391243 1 0 3 0x88 kqread sshd 2311 33082 53512 74 3 0x1100092 bpf pflogd 53512 83043 1 0 3 0x80 netio pflogd 1393 158113 46007 73 3 0x1100090 kqread syslogd 46007 478821 1 0 3 0x100082 netio syslogd 35329 18366 1 0 3 0x100080 kqread resolvd 76989 175689 94945 77 3 0x100092 kqread dhcpleased 71014 298470 94945 77 3 0x100092 kqread dhcpleased 94945 107317 1 0 3 0x80 kqread dhcpleased 42490 405641 0 0 3 0x14200 bored smr 6796 192821 0 0 2 0x14200 zerothread 28470 235600 0 0 3 0x14200 aiodoned aiodoned 1596 523112 0 0 3 0x14200 syncer update 96878 364991 0 0 3 0x14200 cleaner cleaner 84617 127416 0 0 3 0x14200 reaper reaper 93844 256552 0 0 3 0x14200 pgdaemon pagedaemon 15307 212468 0 0 3 0x14200 bored viomb 51850 13588 0 0 3 0x40014200 acpi0 acpi0 67654 234007 0 0 3 0x40014200 idle1 58990 152227 0 0 3 0x14200 bored softnet3 59375 47842 0 0 3 0x14200 bored softnet2 10636 145651 0 0 3 0x14200 bored softnet1 93889 34550 0 0 3 0x14200 bored softnet0 66683 450651 0 0 3 0x14200 bored systqmp 42589 3249 0 0 3 0x14200 bored systq 52174 55168 0 0 3 0x14200 tmoslp softclockmp 80293 156358 0 0 3 0x40014200 tmoslp softclock 28427 256377 0 0 3 0x40014200 idle0 1 458085 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 25210 (syz-executor.3) thread 0xffff80002a211550 (392222) exclusive rwlock amaplk r = 0 (0xfffffd806bf89788) #0 witness_lock+0x447 #1 amap_copy+0x1f1 sys/uvm/uvm_amap.c:634 #2 uvm_fault_check+0x6c7 uvmfault_amapcopy sys/uvm/uvm_fault.c:250 [inline] #2 uvm_fault_check+0x6c7 sys/uvm/uvm_fault.c:710 #3 uvm_fault+0xf2 sys/uvm/uvm_fault.c:600 #4 upageflttrap+0x86 sys/arch/amd64/amd64/trap.c:188 #5 usertrap+0x226 sys/arch/amd64/amd64/trap.c:436 #6 recall_trap+0x8 exclusive rwlock vmmaplk r = 0 (0xfffffd806b6e99d0) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 vm_map_lock_ln+0xfa sys/uvm/uvm_map.c:5372 #3 uvmfault_lookup+0xb6 sys/uvm/uvm_fault.c:1779 #4 uvm_fault_check+0x65d uvmfault_amapcopy sys/uvm/uvm_fault.c:236 [inline] #4 uvm_fault_check+0x65d sys/uvm/uvm_fault.c:710 #5 uvm_fault+0xf2 sys/uvm/uvm_fault.c:600 #6 upageflttrap+0x86 sys/arch/amd64/amd64/trap.c:188 #7 usertrap+0x226 sys/arch/amd64/amd64/trap.c:436 #8 recall_trap+0x8 Process 17790 (syz-executor.0) thread 0xffff80002a22e548 (251218) exclusive rrwlock inode r = 0 (0xfffffd80645c3b40) #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 dounlinkat+0x9d sys/kern/vfs_syscalls.c:1847 #8 syscall+0x533 mi_syscall sys/sys/syscall_mi.h:183 [inline] #8 syscall+0x533 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82e6f950) #0 witness_lock+0x447 #1 syscall+0x51a mi_syscall sys/sys/syscall_mi.h:183 [inline] #1 syscall+0x51a sys/arch/amd64/amd64/trap.c:577 #2 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10205 6557K 6750K 166960K 12520 0 pcb 15 14K 15K 166960K 225 0 rtable 240 15K 15K 166960K 577 0 pf 34 9K 10K 166960K 102 0 ifaddr 46 16K 16K 166960K 88 0 ifgroup 59 2K 2K 166960K 148 0 sysctl 3 1K 1K 166960K 3 0 counters 66 36K 36K 166960K 114 0 ioctlops 0 0K 4K 166960K 1537 0 iov 1 0K 16K 166960K 113 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1357 85K 85K 166960K 1863 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 8 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 246 0 dirhash 12 2K 2K 166960K 27 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 14 49K 77K 166960K 1880 0 sigio 0 0K 0K 166960K 15 0 proc 69 91K 115K 166960K 722 0 subproc 104 6K 6K 166960K 165 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 57 0 in_multi 99 7K 7K 166960K 176 0 ether_multi 1 0K 0K 166960K 5 0 mrt 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 49 228K 228K 166960K 49 0 exec 0 0K 1K 166960K 923 0 pfkey data 0 0K 4K 166960K 11 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 344 84K 85K 166960K 20672 0 UVM aobj 36 4K 4K 166960K 41 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 85 0 NDP 13 0K 2K 166960K 61 0 temp 73 6768K 6849K 166960K 17642 0 kqueue 12 18K 22K 166960K 116 0 SYN cache 2 36K 44K 166960K 3 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 24 0 0 1 0 1 1 0 8 0 rtpcb 120 70 0 67 1 0 1 1 0 8 0 rtentry 112 189 0 79 4 0 4 4 0 8 0 unpcb 144 1181 0 1166 14 13 1 6 0 8 0 syncache 336 15 0 15 4 4 0 1 0 8 0 tcpqe 32 544 0 544 5 5 0 2 0 8 0 tcpcb 808 474 0 468 15 13 2 8 0 8 1 arp 120 37 0 19 1 0 1 1 0 8 0 inpcb 392 1332 0 1323 33 25 8 9 0 8 6 nd6 136 36 0 12 1 0 1 1 0 8 0 pkpcb 40 20 0 20 4 3 1 1 0 8 1 kcovpl 48 12 0 4 1 0 1 1 0 8 0 ppxss 1168 8 0 8 3 3 0 1 0 8 0 pffrag 232 11 0 8 2 1 1 1 0 482 0 pffrnode 88 11 0 8 2 1 1 1 0 8 0 pffrent 40 39 0 36 2 1 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 77 0 54 1 0 1 1 0 8 0 pfstkey 128 77 0 54 2 0 2 2 0 8 0 pfstate 376 77 0 54 5 1 4 4 0 8 0 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 256 700 0 236 32 3 29 30 0 8 0 art_table 32 701 0 236 4 0 4 4 0 8 0 art_node 16 185 0 85 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 1 1 1 0 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 243 0 233 1 0 1 1 0 8 0 shmpl 112 38 0 5 1 0 1 1 0 8 0 dirhash 1024 27 0 10 3 0 3 3 0 8 0 dino2pl 256 3796 0 2337 92 0 92 92 0 8 0 ffsino 272 3796 0 2337 98 0 98 98 0 8 0 nchpl 144 6574 0 4918 64 0 64 64 0 8 0 uvmvnodes 80 4285 0 0 88 0 88 88 0 8 0 vnodes 216 4285 0 0 239 0 239 239 0 8 0 namei 1024 21502 0 21501 3 2 1 2 0 8 0 percpumem 16 71 0 24 1 0 1 1 0 8 0 kstatmem 264 74 0 48 2 0 2 2 0 8 0 scxspl 216 19846 0 19846 13 10 3 8 1 8 3 plimitpl 152 97 0 80 1 0 1 1 0 8 0 sigapl 424 2217 0 2163 8 1 7 8 0 8 0 futexpl 64 13283 0 13280 1 0 1 1 0 8 0 knotepl 120 123 0 0 4 0 4 4 0 8 0 kqueuepl 216 377 0 369 5 0 5 5 0 8 4 pipepl 320 504 0 476 18 10 8 8 0 8 5 fdescpl 496 2178 0 2151 7 2 5 5 0 8 0 filepl 152 11045 0 10798 37 19 18 18 0 8 7 lockfpl 104 369 0 363 1 0 1 1 0 8 0 lockfspl 48 128 0 125 1 0 1 1 0 8 0 sessionpl 144 28 0 11 1 0 1 1 0 8 0 pgrppl 48 36 0 19 1 0 1 1 0 8 0 ucredpl 104 1406 0 1384 1 0 1 1 0 8 0 zombiepl 144 2166 0 2163 1 0 1 1 0 8 0 processpl 1136 2217 0 2163 5 0 5 5 0 8 0 procpl 680 5320 0 5244 9 1 8 9 0 8 0 srpgc 96 6 0 6 2 2 0 1 0 8 0 sosppl 168 14 0 14 3 2 1 1 0 8 1 sockpl 584 2603 0 2576 40 32 8 17 0 8 5 mcl64k 65536 7 0 0 1 0 1 1 0 8 0 mcl16k 16384 8 0 0 1 0 1 1 0 8 0 mcl12k 12288 13 0 0 2 0 2 2 0 8 0 mcl9k 9216 5 0 0 1 0 1 1 0 8 0 mcl8k 8192 12 0 0 2 0 2 2 0 8 0 mcl4k 4096 19 0 0 3 0 3 3 0 8 0 mcl2k2 2112 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 328 0 0 41 0 41 41 0 8 0 mtagpl 96 145 0 0 4 0 4 4 0 8 0 mbufpl 256 414 0 0 22 0 22 22 0 8 0 bufpl 280 6778 0 458 452 0 452 452 0 8 0 anonpl 24 322290 0 309663 100 5 95 95 0 186 0 amapchunkpl 152 65148 0 64287 43 4 39 39 0 158 2 amappl16 200 7471 0 7001 27 0 27 27 0 8 1 amappl15 192 34 0 33 1 0 1 1 0 8 0 amappl14 184 250 0 235 2 1 1 2 0 8 0 amappl13 176 21 0 20 1 0 1 1 0 8 0 amappl12 168 2985 0 2955 3 1 2 2 0 8 0 amappl11 160 75 0 61 1 0 1 1 0 8 0 amappl10 152 40 0 29 1 0 1 1 0 8 0 amappl9 144 335 0 334 1 0 1 1 0 8 0 amappl8 136 295 0 221 3 0 3 3 0 8 0 amappl7 128 200 0 174 2 0 2 2 0 8 0 amappl6 120 312 0 305 1 0 1 1 0 8 0 amappl5 112 148 0 136 1 0 1 1 0 8 0 amappl4 104 543 0 515 2 1 1 2 0 8 0 amappl3 96 12676 0 12585 4 1 3 3 0 8 0 amappl2 88 2656 0 2578 3 1 2 3 0 8 0 amappl1 80 16364 0 15810 23 10 13 23 0 8 0 amappl 88 20060 0 19830 6 0 6 6 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 40 0 5 1 0 1 1 0 8 0 uaddrrnd 24 2179 0 2152 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2179 0 2152 1 0 1 1 0 8 0 vmmpekpl 168 21540 0 21490 3 0 3 3 0 8 0 vmmpepl 168 149765 0 147444 187 51 136 142 0 357 24 vmsppl 448 2178 0 2152 6 2 4 4 0 8 0 rwobjpl 56 45805 0 39895 85 1 84 84 0 8 0 pdppl 4096 4365 0 4304 205 136 69 77 0 8 8 pvpl 32 42197 0 0 341 0 341 341 0 265 0 pmappl 248 2178 0 2152 3 1 2 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 584 0 198 12 0 12 12 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace ufs_lookup() at ufs_lookup+0x4d0 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffd8062c397c8,ffff800037375eb8,ffff800037375ee8) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 vfs_lookup(ffff800037375e88) at vfs_lookup+0x6e2 sys/kern/vfs_lookup.c:566 namei(ffff800037375e88) at namei+0x55a sys/kern/vfs_lookup.c:250 dounlinkat(ffff80002a22e548,ffffff9c,7cbc1ab731a0,8) at dounlinkat+0x9d sys/kern/vfs_syscalls.c:1847 syscall(ffff800037376060) at syscall+0x533 mi_syscall sys/sys/syscall_mi.h:183 [inline] syscall(ffff800037376060) at syscall+0x533 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7cbc1ab73190, count: -7 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffff800029cebff0) 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 __mp_lock(ffffffff82e6f748) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82e6f748) at __mp_lock+0x122 sys/kern/kern_lock.c:147 syscall(ffff8000373effa0) at syscall+0x51a mi_syscall sys/sys/syscall_mi.h:183 [inline] syscall(ffff8000373effa0) at syscall+0x51a sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7486fa1cead0, count: 9 ddb{1}> trace x86_ipi_db(ffff800029cebff0) 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 __mp_lock(ffffffff82e6f748) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82e6f748) at __mp_lock+0x122 sys/kern/kern_lock.c:147 syscall(ffff8000373effa0) at syscall+0x51a mi_syscall sys/sys/syscall_mi.h:183 [inline] syscall(ffff8000373effa0) at syscall+0x51a sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7486fa1cead0, count: -6