kernel: protection fault trap, code=0 Stopped at malloc+0x855: movq 0x8(%rbx),%r14 ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic the kernel did not panic ddb{1}> show kasan No such command ddb{1}> trace malloc(10,7f,1) at malloc+0x855 sys/kern/kern_malloc.c:294 ktrsyscall(ffff80002a222540,67,8,ffff80002a2ac030) at ktrsyscall+0x19a sys/kern/kern_ktrace.c:174 syscall(ffff80002a2ac030) at syscall+0x305 mi_syscall sys/sys/syscall_mi.h:154 [inline] syscall(ffff80002a2ac030) at syscall+0x305 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x717ed9bf2a10, count: -4 ddb{1}> show registers rdi 0xaddb3cb5734f0cd3 rsi 0 rbp 0xffff80002a2abe70 rbx 0xaddb3cb5734f0cd3 rdx 0 rcx 0xffff80002a222540 rax 0xffff80002999dff0 r8 0 r9 0 r10 0 r11 0xea6e90fe8b7d1056 r12 0 r13 0xffffffff83b08000 kmemstats+0x1fc0 r14 0xa30c333 __kernel_phys_end+0x670c333 r15 0xaddb3cb5734f0cd3 rip 0xffffffff82fe67e5 malloc+0x855 cs 0x8 rflags 0x10282 __ALIGN_SIZE+0xf282 rsp 0xffff80002a2abdb0 ss 0x10 malloc+0x855: movq 0x8(%rbx),%r14 ddb{1}> show proc PROC (syz-executor) tid=420950 pid=61871 tcnt=1 stat=onproc flags process=10000002 proc=1 runpri=50, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800045ffd9f8,0xffff80002a222a80 process=0xffff800045ff0e80 user=0xffff80002a2a7000, vmspace=0xffffee006f0ab010 estcpu=15, cpticks=8, pctcpu=0.5, user=0, sys=7, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 46382 200225 32689 0 2 0 syz-executor 34169 102098 20575 0 2 0 syz-executor 65723 135859 64834 0 2 0 syz-executor 65723 264972 64834 0 3 0x4000080 fsleep syz-executor 65723 464176 64834 0 3 0x4000080 pipewr syz-executor 52736 58473 4102 0 2 0 syz-executor 52736 366951 4102 0 3 0x4000080 ttyout syz-executor 80813 129885 28781 0 3 0x80 nanoslp syz-executor 80813 289321 28781 0 3 0x4000080 msgwait syz-executor 80813 32178 28781 0 3 0x4000080 fsleep syz-executor 80307 519726 51058 0 3 0x100082 sbwait arp 51058 377865 41111 0 3 0x10008a sigsusp sh 4102 106819 91028 0 3 0x82 nanoslp syz-executor 41111 329565 91028 0 3 0x82 wait syz-executor 64834 195725 91028 0 3 0x82 nanoslp syz-executor 32689 334186 91028 0 2 0x2 syz-executor 20575 272264 91028 0 2 0x2 syz-executor 28781 468923 91028 0 3 0x82 nanoslp syz-executor 65017 341445 91028 0 3 0x82 nanoslp syz-executor *61871 420950 91028 0 7 0x10000003 syz-executor 91028 32046 80997 0 3 0x82 kqread syz-executor 80997 189199 14900 0 3 0x10008a sigsusp ksh 14900 418551 29889 0 3 0x98 kqread sshd-session 29889 509132 39525 0 3 0x92 kqread sshd-session 16109 469222 1 0 3 0x100083 ttyin getty 39525 458813 1 0 3 0x88 kqread sshd 15538 330621 17653 74 3 0x1100092 bpf pflogd 17653 107022 1 0 3 0x80 sbwait pflogd 48061 449266 91847 73 3 0x1100090 kqread syslogd 91847 183560 1 0 3 0x100082 sbwait syslogd 31062 311868 1 0 3 0x100080 kqread resolvd 18706 92093 85119 77 3 0x100092 kqread dhcpleased 28702 422987 85119 77 3 0x100092 kqread dhcpleased 85119 75569 1 0 3 0x80 kqread dhcpleased 14559 438074 0 0 3 0x14200 bored smr 66004 368375 0 0 2 0x14200 zerothread 91483 134723 0 0 3 0x14200 aiodoned aiodoned 94968 90937 0 0 3 0x14200 syncer update 20531 440900 0 0 3 0x14200 cleaner cleaner 10510 309050 0 0 2 0x14200 reaper 59385 391370 0 0 3 0x14200 pgdaemon pagedaemon 88965 505386 0 0 3 0x14200 bored viomb 63932 210429 0 0 3 0x40014200 acpi0 acpi0 93809 294535 0 0 3 0x40014200 idle1 52447 282672 0 0 3 0x14200 bored softnet1 74251 72879 0 0 3 0x14200 bored softnet0 59096 418391 0 0 3 0x14200 smrbar systqmp 57094 15402 0 0 3 0x14200 bored systq 17019 147351 0 0 3 0x14200 tmoslp softclockmp 17332 221938 0 0 3 0x40014200 tmoslp softclock 60478 450510 0 0 3 0x40014200 idle0 1 315436 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 0: exclusive mutex amapchunkpl r = 0 (0xffffffff83b08e88) #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_put+0xa6 sys/kern/subr_pool.c:803 #3 amap_free+0x1c7 sys/uvm/uvm_amap.c:-1 #4 uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1359 #5 uvm_map_teardown+0x360 sys/uvm/uvm_map.c:2536 #6 exit1+0x71b sys/kern/kern_exit.c:260 #7 sys_exit+0x1a sys/kern/kern_exit.c:-1 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #9 Xsyscall+0x128 CPU 1: exclusive mutex /syzkaller/managers/multicore/kernel/sys/kern/kern_malloc.c:96 r = 0 (0xffffffff839b0038) #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 malloc+0x2ef sys/kern/kern_malloc.c:200 #3 ktrsyscall+0x19a sys/kern/kern_ktrace.c:174 #4 syscall+0x305 mi_syscall sys/sys/syscall_mi.h:154 [inline] #4 syscall+0x305 sys/arch/amd64/amd64/trap.c:783 #5 Xsyscall+0x128 Process 59096 (systqmp) thread 0xffff800045ffe000 (418391) shared rwlock systqmp r = 0 (0xffffffff838f8528) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 taskq_thread+0x12a sys/kern/kern_task.c:442 #2 proc_trampoline+0x10 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11058 12087K 12101K 166960K 12156 0 pcb 17 12K 12K 166960K 28 0 rtable 221 6K 6K 166960K 338 0 pf 34 17K 18K 166960K 50 0 ifaddr 41 7K 7K 166960K 44 0 ifgroup 55 2K 2K 166960K 60 0 sysctl 1 1K 9K 166960K 5 0 counters 70 37K 37K 166960K 72 0 ioctlops 0 0K 4K 166960K 1485 0 iov 0 0K 1K 166960K 2 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1293 81K 81K 166960K 1380 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 1K 166960K 2 0 VM map 2 1K 1K 166960K 2 0 sem 2 0K 0K 166960K 2 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1734 201K 291K 166960K 11964 0 file desc 17 61K 89K 166960K 142 0 proc 70 115K 180K 166960K 545 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 1 0 in_multi 89 6K 6K 166960K 89 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 2 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 391 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 240 161K 170K 166960K 3176 0 UVM aobj 36 2K 2K 166960K 37 0 pinsyscall 43 86K 104K 166960K 1329 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 NDP 18 0K 1K 166960K 27 0 temp 37 9114K 9120K 166960K 5469 0 kqueue 13 20K 22K 166960K 26 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 28 0 0 1 0 1 1 0 8 0 rtpcb 120 37 0 33 1 0 1 1 0 8 0 rtentry 176 103 0 1 5 0 5 5 0 8 0 unpcb 144 40 0 23 1 0 1 1 0 8 0 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpcb 736 10 0 6 1 0 1 1 0 8 0 arp 136 17 0 0 1 0 1 1 0 8 0 inpcb 328 77 0 69 2 0 2 2 0 8 1 nd6 152 21 0 0 1 0 1 1 0 8 0 kcovpl 48 8 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 pftag 88 2 0 0 1 0 1 1 0 8 0 pfstitem 24 19 0 0 1 0 1 1 0 8 0 pfstkey 128 19 0 0 1 0 1 1 0 8 0 pfstate 448 19 0 0 3 0 3 3 0 8 0 pfrule 1360 23 0 17 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 0 26 0 26 26 0 8 0 art_table 40 413 0 0 5 0 5 5 0 8 0 art_node 32 103 0 8 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 0 1 0 1 1 0 8 0 shmpl 112 34 0 1 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 1595 0 126 93 0 93 93 0 8 0 ffsino 296 1595 0 126 114 0 114 114 0 8 0 nchpl 144 1800 0 100 64 0 64 64 0 8 0 vnodes 216 1688 0 0 94 0 94 94 0 8 0 namei 1024 5647 0 5647 2 0 2 2 0 8 2 percpumem 16 52 0 1 1 0 1 1 0 8 0 kstatmem 264 29 0 2 2 0 2 2 0 8 0 scxspl 216 6298 0 6298 4 3 1 3 1 8 1 plimitpl 152 31 0 13 1 0 1 1 0 8 0 sigapl 424 471 0 422 7 0 7 7 0 8 0 knotepl 120 56 0 0 2 0 2 2 0 8 0 kqueuepl 224 23 0 14 1 0 1 1 0 8 0 pipepl 344 132 0 104 3 0 3 3 0 8 0 fdescpl 528 455 0 424 3 0 3 3 0 8 0 filepl 160 1728 0 1509 11 0 11 11 0 8 1 lockfpl 104 14 0 12 1 0 1 1 0 8 0 lockfspl 48 8 0 6 1 0 1 1 0 8 0 sessionpl 144 25 0 16 1 0 1 1 0 8 0 pgrppl 48 33 0 16 1 0 1 1 0 8 0 ucredpl 104 131 0 118 1 0 1 1 0 8 0 zombiepl 144 424 0 422 1 0 1 1 0 8 0 processpl 1232 471 0 422 5 0 5 5 0 8 0 procpl 664 495 0 440 5 0 5 5 0 8 0 sockpl 752 154 0 125 4 0 4 4 0 8 0 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl9k128 9344 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 111 0 0 14 0 14 14 0 8 0 mcl2k 2048 27 0 0 4 0 4 4 0 8 0 mextrefs 64 27 0 0 1 0 1 1 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 223 0 0 14 0 14 14 0 8 0 bufpl 272 2331 0 105 149 0 149 149 0 8 0 anonpl 32 3711 0 0 30 0 30 30 0 247 0 amapchunkpl 152 8734 0 8255 20 0 20 20 0 158 0 amappl16 200 1527 0 1510 5 1 4 5 0 8 3 amappl15 192 1 0 1 1 1 0 1 0 8 0 amappl14 184 437 0 435 1 0 1 1 0 8 0 amappl13 176 128 0 115 1 0 1 1 0 8 0 amappl12 168 710 0 679 2 0 2 2 0 8 0 amappl11 160 5 0 5 1 1 0 1 0 8 0 amappl10 152 66 0 52 1 0 1 1 0 8 0 amappl9 144 276 0 276 1 1 0 1 0 8 0 amappl8 136 101 0 98 1 0 1 1 0 8 0 amappl7 128 149 0 135 1 0 1 1 0 8 0 amappl6 120 150 0 148 1 0 1 1 0 8 0 amappl5 112 99 0 89 1 0 1 1 0 8 0 amappl4 104 317 0 297 1 0 1 1 0 8 0 amappl3 96 1522 0 1413 3 0 3 3 0 8 0 amappl2 88 557 0 496 2 0 2 2 0 8 0 amappl1 80 10674 0 10051 15 0 15 15 0 8 1 amappl 88 2431 0 2267 4 0 4 4 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 36 0 1 1 0 1 1 0 8 0 uaddrrnd 24 455 0 424 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 455 0 424 1 0 1 1 0 8 0 vmmpekpl 168 5800 0 5766 2 0 2 2 0 8 0 vmmpepl 168 38549 0 36653 88 0 88 88 0 357 3 vmsppl 488 454 0 423 5 0 5 5 0 8 0 rwobjpl 80 14608 0 13523 24 0 24 24 0 8 0 pdppl 4096 917 0 846 99 20 79 83 0 8 8 pvpl 32 10236 0 0 84 0 84 84 0 265 1 pmappl 256 454 0 423 3 0 3 3 0 8 0 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 112 421 0 23 12 0 12 12 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff838ebff0) 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 pool_do_put(ffffffff83b08e70,ffffee006cdee3a0) at pool_do_put+0x180 sys/kern/subr_pool.c:847 pool_put(ffffffff83b08e70,ffffee006cdee3a0) at pool_put+0xba sys/kern/subr_pool.c:805 amap_free(ffffee006d7134e0) at amap_free+0x1c7 sys/uvm/uvm_amap.c:-1 uvm_unmap_detach(ffff800039fb4200,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1359 uvm_map_teardown(ffffee006cda3020) at uvm_map_teardown+0x360 sys/uvm/uvm_map.c:2536 exit1(ffff80002a2207e0,b,0,1) at exit1+0x71b sys/kern/kern_exit.c:260 sys_exit(ffff80002a2207e0,ffff800039fb43d0,ffff800039fb4320) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800039fb43d0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800039fb43d0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c22da690fc0, count: -12 ddb{0}> machine ddbcpu 1 Stopped at malloc+0x855: movq 0x8(%rbx),%r14 ddb{1}> trace malloc(10,7f,1) at malloc+0x855 sys/kern/kern_malloc.c:294 ktrsyscall(ffff80002a222540,67,8,ffff80002a2ac030) at ktrsyscall+0x19a sys/kern/kern_ktrace.c:174 syscall(ffff80002a2ac030) at syscall+0x305 mi_syscall sys/sys/syscall_mi.h:154 [inline] syscall(ffff80002a2ac030) at syscall+0x305 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x717ed9bf2a10, count: -4