panic: pool_do_get: shmpl free list modified: page 0xfffffd8068d75000; item addr 0xfffffd8068d75e70; offset 0x40=0x695c3de0 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *192844 94460 32767 0x10 0x4000000 1K syz-executor 286622 61082 32767 0x10 0x4000000 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833a8bfa) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff8395faa8,1,ffff80003b014e88) at pool_do_get+0x5df pool_get(ffffffff8395faa8,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff8000fffe6550,ffff80003b0150e0,4c,ffff80003b015030) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff8000fffe6550,ffff80003b0150e0,ffff80003b015030) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003b0150e0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003b0150e0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd44313accf0, count: 7 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 *cpu1: pool_do_get: shmpl free list modified: page 0xfffffd8068d75000; item addr 0xfffffd8068d75e70; offset 0x40=0x695c3de0 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833a8bfa) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff8395faa8,1,ffff80003b014e88) at pool_do_get+0x5df pool_get(ffffffff8395faa8,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff8000fffe6550,ffff80003b0150e0,4c,ffff80003b015030) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff8000fffe6550,ffff80003b0150e0,ffff80003b015030) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003b0150e0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003b0150e0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd44313accf0, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80003b014cb0 rbx 0xffff8000299dee07 rdx 0 rcx 0xffff8000fffe6550 rax 0xffff8000299ddff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x31ece68b460ac8ef r11 0x18add370bcbcf0b3 r12 0xffff8000299dec08 r13 0 r14 0 r15 0x1 rip 0xffffffff81fa2dc5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003b014ca0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=192844 pid=94460 tcnt=2 stat=onproc flags process=10 proc=4000000 runpri=32, usrpri=71, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000fffe7248,0xffff8000fffe7a20 process=0xffff80003b00dd00 user=0xffff80003b010000, vmspace=0xfffffd806cc37d78 estcpu=21, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 18145 223298 91431 32767 2 0x10 syz-executor 18145 323723 91431 32767 3 0x4000090 fsleep syz-executor 88514 197841 50538 32767 4 0x82010 syz-executor 88514 445821 50538 32767 2 0x4082010 syz-executor 88514 123895 50538 32767 3 0x4002010 suspend syz-executor 78077 480046 45720 32767 2 0x10 syz-executor 78077 341229 45720 32767 2 0x4000010 syz-executor 78077 144552 45720 32767 3 0x4000090 fsleep syz-executor 94460 201405 11561 32767 2 0x10 syz-executor *94460 192844 11561 32767 7 0x4000010 syz-executor 85273 330774 57512 32767 3 0x3010 suspend syz-executor 85273 66246 57512 32767 2 0x4081010 syz-executor 51796 493802 72185 32767 2 0x10 syz-executor 51796 384851 72185 32767 3 0x4000090 fsleep syz-executor 61082 416022 19151 32767 2 0x10 syz-executor 61082 286622 19151 32767 7 0x4000010 syz-executor 50538 257189 23699 32767 3 0x90 nanoslp syz-executor 45720 402572 52708 32767 3 0x90 nanoslp syz-executor 11561 151222 28503 32767 3 0x90 nanoslp syz-executor 72185 351099 46652 32767 3 0x90 nanoslp syz-executor 72860 380743 95631 32767 2 0x10 syz-executor 57512 19442 34130 32767 2 0xc90 syz-executor 91431 333268 92848 32767 3 0x90 nanoslp syz-executor 19151 423805 4912 32767 2 0xc90 syz-executor 95631 295140 3265 0 3 0x82 wait syz-executor 4912 424753 3265 0 3 0x82 wait syz-executor 92848 8474 3265 0 3 0x82 wait syz-executor 46652 521364 3265 0 3 0x82 wait syz-executor 34130 397576 3265 0 3 0x82 wait syz-executor 23699 408680 3265 0 3 0x82 wait syz-executor 52708 113096 3265 0 3 0x82 wait syz-executor 28503 397161 3265 0 3 0x82 wait syz-executor 3265 166717 53286 0 3 0x82 kqread syz-executor 53286 518043 21378 0 3 0x10008a sigsusp ksh 21378 448073 29003 0 3 0x98 kqread sshd-session 29003 432075 81098 0 3 0x92 kqread sshd-session 74655 54047 1 0 3 0x100083 ttyin getty 81098 143368 1 0 3 0x88 kqread sshd 5704 382967 47261 73 3 0x1100090 kqread syslogd 47261 159765 1 0 3 0x100082 sbwait syslogd 93803 501869 1 0 3 0x100080 kqread resolvd 39964 409682 21322 77 3 0x100092 kqread dhcpleased 40615 307727 21322 77 3 0x100092 kqread dhcpleased 21322 458757 1 0 3 0x80 kqread dhcpleased 59380 213421 0 0 3 0x14200 bored smr 24725 283444 0 0 3 0x14200 pgzero zerothread 10729 385987 0 0 3 0x14200 aiodoned aiodoned 24038 113685 0 0 3 0x14200 syncer update 42032 342045 0 0 3 0x14200 cleaner cleaner 45702 503484 0 0 3 0x14200 reaper reaper 21770 10502 0 0 3 0x14200 pgdaemon pagedaemon 86680 410206 0 0 3 0x14200 bored viomb 13662 317627 0 0 3 0x40014200 acpi0 acpi0 10725 100637 0 0 3 0x40014200 idle1 17493 223085 0 0 3 0x14200 bored softnet1 93871 184652 0 0 3 0x14200 bored softnet0 48579 317581 0 0 3 0x14200 bored systqmp 63554 275771 0 0 3 0x14200 bored systq 57543 303448 0 0 3 0x14200 tmoslp softclockmp 65832 381547 0 0 2 0x40014200 softclock 35471 246350 0 0 3 0x40014200 idle0 1 508083 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex shmpl r = 0 (0xffffffff8395fac0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 mtx_enter+0x4b4 sys/kern/kern_lock.c:487 #2 pool_get+0x124 sys/kern/subr_pool.c:581 #3 shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 #4 sys_shmget+0x195 sys/kern/sysv_shm.c:482 #5 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #6 Xsyscall+0x128 Process 94460 (syz-executor) thread 0xffff8000fffe6550 (192844) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff838be288) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] #1 syscall+0xaf4 sys/arch/amd64/amd64/trap.c:775 #2 Xsyscall+0x128 exclusive mutex shmpl r = 0 (0xffffffff8395fac0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 mtx_enter+0x4b4 sys/kern/kern_lock.c:487 #2 pool_get+0x124 sys/kern/subr_pool.c:581 #3 shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 #4 sys_shmget+0x195 sys/kern/sysv_shm.c:482 #5 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #6 Xsyscall+0x128 Process 61082 (syz-executor) thread 0xffff80003c440a88 (286622) shared rwlock vmmaplk r = 0 (0xfffffd806c94eab8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1880 #3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #5 kpageflttrap+0x2f4 sys/arch/amd64/amd64/trap.c:283 #6 kerntrap+0x19c sys/arch/amd64/amd64/trap.c:520 #7 alltraps_kern_meltdown+0x7b #8 copyout+0x64 #9 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #10 Xsyscall+0x128 Process 72860 (syz-executor) thread 0xffff8000fffee018 (380743) exclusive rrwlock inode r = 0 (0xfffffd806a0d66a0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vget+0x2a2 sys/kern/vfs_subr.c:686 #6 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1203 #8 ufs_lookup+0x1a36 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x93a sys/kern/vfs_lookup.c:566 #11 namei+0x7ca sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1868 #13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806cf5ec60) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1868 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11049 12018K 12034K 166960K 12140 0 pcb 17 12K 12K 166960K 17 0 rtable 239 6K 7K 166960K 358 0 pf 31 16K 16K 166960K 31 0 ifaddr 42 7K 7K 166960K 44 0 ifgroup 50 2K 2K 166960K 50 0 sysctl 2 1K 9K 166960K 6 0 counters 70 37K 37K 166960K 70 0 ioctlops 0 0K 2K 166960K 31 0 iov 0 0K 4K 166960K 2 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1336 84K 84K 166960K 1358 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 3 0 VM map 2 1K 1K 166960K 2 0 sem 2 0K 0K 166960K 2 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 25 93K 125K 166960K 204 0 sigio 0 0K 0K 166960K 2 0 proc 58 99K 180K 166960K 477 0 subproc 72 4K 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 11 0 in_multi 99 7K 7K 166960K 101 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 55 254K 254K 166960K 55 0 exec 0 0K 1K 166960K 355 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 253 168K 177K 166960K 3522 0 UVM aobj 3 2K 2K 166960K 4 0 pinsyscall 46 92K 111K 166960K 1242 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 10 0 NDP 13 0K 2K 166960K 27 0 temp 39 8667K 8731K 166960K 4037 0 kqueue 15 22K 26K 166960K 33 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> 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 50 0 45 1 0 1 1 0 8 0 rtentry 176 112 0 1 6 0 6 6 0 8 0 unpcb 144 70 0 50 1 0 1 1 0 8 0 syncache 336 3 0 3 1 0 1 1 0 8 1 tcpcb 736 35 0 27 1 0 1 1 0 8 0 arp 136 18 0 0 1 0 1 1 0 8 0 inpcb 328 192 0 180 4 0 4 4 0 8 2 nd6 152 25 0 0 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 256 463 0 0 29 0 29 29 0 8 0 art_table 40 464 0 0 5 0 5 5 0 8 0 art_node 32 112 0 11 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 2 1 0 1 1 0 8 0 shmpl 112 1 0 1 1 0 1 1 0 8 1 pool(0xffffffff8395faa8:shmpl): page inconsistency: page 0xfffffd8068d75000; 34 on list, 0 missing, 35 items per page dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 1641 0 133 95 0 95 95 0 8 0 ffsino 296 1641 0 133 117 0 117 117 0 8 0 nchpl 144 1912 0 223 63 0 63 63 0 8 0 vnodes 216 1722 0 0 96 0 96 96 0 8 0 namei 1024 5516 0 5516 1 0 1 1 0 8 1 percpumem 16 50 0 0 1 0 1 1 0 8 0 kstatmem 264 24 0 0 2 0 2 2 0 8 0 scxspl 216 6188 0 6188 3 1 2 2 1 8 2 plimitpl 152 75 0 49 2 0 2 2 0 8 1 sigapl 424 484 0 431 7 0 7 7 0 8 0 knotepl 120 304 0 0 10 0 10 10 0 8 0 kqueuepl 224 34 0 24 1 0 1 1 0 8 0 pipepl 344 117 0 90 3 0 3 3 0 8 0 fdescpl 528 468 0 431 4 0 4 4 0 8 0 filepl 160 1791 0 1566 11 0 11 11 0 8 1 lockfpl 104 20 0 17 1 0 1 1 0 8 0 lockfspl 48 11 0 8 1 0 1 1 0 8 0 sessionpl 144 21 0 5 1 0 1 1 0 8 0 pgrppl 48 30 0 6 1 0 1 1 0 8 0 ucredpl 104 150 0 131 1 0 1 1 0 8 0 zombiepl 144 432 0 431 1 0 1 1 0 8 0 processpl 1232 484 0 431 5 0 5 5 0 8 0 procpl 664 576 0 514 6 0 6 6 0 8 0 sockpl 752 312 0 275 8 0 8 8 0 8 3 mcl64k 65536 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 116 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 44 0 0 6 0 6 6 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 259 0 0 17 0 17 17 0 8 0 bufpl 280 2334 0 119 159 0 159 159 0 8 0 anonpl 32 6188 0 0 50 0 50 50 0 246 0 amapchunkpl 152 10334 0 9800 29 0 29 29 0 158 6 amappl16 200 2164 0 1954 12 0 12 12 0 8 0 amappl15 192 3 0 3 1 0 1 1 0 8 1 amappl14 184 12 0 12 1 1 0 1 0 8 0 amappl13 176 402 0 400 1 0 1 1 0 8 0 amappl12 168 799 0 753 3 0 3 3 0 8 0 amappl11 160 67 0 67 1 1 0 1 0 8 0 amappl10 152 41 0 31 1 0 1 1 0 8 0 amappl9 144 271 0 271 1 0 1 1 0 8 1 amappl8 136 21 0 20 1 0 1 1 0 8 0 amappl7 128 139 0 138 1 0 1 1 0 8 0 amappl6 120 262 0 251 1 0 1 1 0 8 0 amappl5 112 79 0 71 1 0 1 1 0 8 0 amappl4 104 357 0 335 1 0 1 1 0 8 0 amappl3 96 1569 0 1471 3 0 3 3 0 8 0 amappl2 88 564 0 488 2 0 2 2 0 8 0 amappl1 80 8854 0 8289 14 0 14 14 0 8 0 amappl 88 2838 0 2655 5 0 5 5 0 92 0 uvmvnodes 80 100 0 0 3 0 3 3 0 8 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 3 0 1 1 0 1 1 0 8 0 uaddrrnd 24 468 0 431 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 468 0 431 1 0 1 1 0 8 0 vmmpekpl 168 5357 0 5325 2 0 2 2 0 8 0 vmmpepl 168 37583 0 35354 97 0 97 97 0 357 0 vmsppl 488 467 0 431 7 1 6 6 0 8 0 rwobjpl 80 13611 0 12495 23 0 23 23 0 8 0 pdppl 4096 943 0 862 107 20 87 97 0 8 6 pvpl 32 12746 0 0 103 0 103 103 0 265 0 pmappl 256 467 0 431 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 285 0 23 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83810ff0) 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 __mp_lock(ffffffff838be080) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff838be080) at __mp_lock+0x1a3 sys/kern/kern_lock.c:173 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 __sanitizer_cov_trace_const_cmp4(0,0) at __sanitizer_cov_trace_const_cmp4+0x50 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_const_cmp4(0,0) at __sanitizer_cov_trace_const_cmp4+0x50 sys/dev/kcov.c:230 rw_do_exit_read(fffffd806c94eaa0,8) at rw_do_exit_read+0xfe rw_exited sys/kern/kern_rwlock.c:506 [inline] rw_do_exit_read(fffffd806c94eaa0,8) at rw_do_exit_read+0xfe sys/kern/kern_rwlock.c:141 uvmfault_lookup(ffff80003c46f4a0,0) at uvmfault_lookup+0x22a sys/uvm/uvm_fault.c:1882 uvm_fault_check(ffff80003c46f4a0,ffff80003c46f4d8,ffff80003c46f510,0) at uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693 uvm_fault(fffffd806c94e9b8,bc2000,0,2) at uvm_fault+0x106 sys/uvm/uvm_fault.c:627 kpageflttrap(ffff80003c46f650,bc2660) at kpageflttrap+0x2f4 sys/arch/amd64/amd64/trap.c:283 end trace frame: 0xffff80003c46f640, count: 0 ddb{0}> trace x86_ipi_db(ffffffff83810ff0) 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 __mp_lock(ffffffff838be080) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff838be080) at __mp_lock+0x1a3 sys/kern/kern_lock.c:173 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 __sanitizer_cov_trace_const_cmp4(0,0) at __sanitizer_cov_trace_const_cmp4+0x50 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_const_cmp4(0,0) at __sanitizer_cov_trace_const_cmp4+0x50 sys/dev/kcov.c:230 rw_do_exit_read(fffffd806c94eaa0,8) at rw_do_exit_read+0xfe rw_exited sys/kern/kern_rwlock.c:506 [inline] rw_do_exit_read(fffffd806c94eaa0,8) at rw_do_exit_read+0xfe sys/kern/kern_rwlock.c:141 uvmfault_lookup(ffff80003c46f4a0,0) at uvmfault_lookup+0x22a sys/uvm/uvm_fault.c:1882 uvm_fault_check(ffff80003c46f4a0,ffff80003c46f4d8,ffff80003c46f510,0) at uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693 uvm_fault(fffffd806c94e9b8,bc2000,0,2) at uvm_fault+0x106 sys/uvm/uvm_fault.c:627 kpageflttrap(ffff80003c46f650,bc2660) at kpageflttrap+0x2f4 sys/arch/amd64/amd64/trap.c:283 kerntrap(ffff80003c46f650) at kerntrap+0x19c sys/arch/amd64/amd64/trap.c:520 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x64 syscall(ffff80003c46fa90) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c46fa90) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x607462fc2d0, count: -19 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x25: addq $0x8,%rsp db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833a8bfa) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff8395faa8,1,ffff80003b014e88) at pool_do_get+0x5df pool_get(ffffffff8395faa8,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff8000fffe6550,ffff80003b0150e0,4c,ffff80003b015030) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff8000fffe6550,ffff80003b0150e0,ffff80003b015030) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003b0150e0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003b0150e0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd44313accf0, count: 7 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833a8bfa) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff8395faa8,1,ffff80003b014e88) at pool_do_get+0x5df pool_get(ffffffff8395faa8,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff8000fffe6550,ffff80003b0150e0,4c,ffff80003b015030) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff8000fffe6550,ffff80003b0150e0,ffff80003b015030) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003b0150e0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003b0150e0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd44313accf0, count: -8