kernel: protection fault trap, code=0 Stopped at malloc+0x855: movq 0x8(%rbx),%r14 ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> show kasan No such command ddb{0}> trace malloc(10,62,2) at malloc+0x855 sys/kern/kern_malloc.c:294 amap_alloc1(20,2,0) at amap_alloc1+0x291 sys/uvm/uvm_amap.c:356 amap_alloc(20000,2,0) at amap_alloc+0xad sys/uvm/uvm_amap.c:-1 amap_copy(ffffee0069971218,ffffee0069b9ccb0,2,0,df839644000,df839644001) at amap_copy+0x6a8 sys/uvm/uvm_amap.c:570 uvm_fault_check(ffff80002a31bdc0,ffff80002a31bdf8,ffff80002a31be30,0) at uvm_fault_check+0x473 sys/uvm/uvm_fault.c:747 uvm_fault(ffffee0069971218,df839644000,0,2) at uvm_fault+0x106 sys/uvm/uvm_fault.c:627 upageflttrap(ffff80002a31bf60,df839644578) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:194 usertrap(ffff80002a31bf60) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:648 recall_trap() at recall_trap+0x8 end trace frame: 0x0, count: -9 ddb{0}> show registers rdi 0x80b31c92cba1617 rsi 0x6ac7cbb1 rbp 0xffff80002a31ba60 rbx 0x80b31c9467ddda6 rdx 0 rcx 0xffff800045fe9778 rax 0xffffffff83959ff0 cpu_info_full_primary+0x1ff0 r8 0xdf839644000 r9 0xdf839644001 r10 0 r11 0x1c5ed3ac6fb38859 r12 0x6ac7cbb1 r13 0xffffffff83a0ebd0 kmemstats+0x1880 r14 0xa30c333 __kernel_phys_end+0x670c333 r15 0x80b31c92cba1617 rip 0xffffffff8145e475 malloc+0x855 cs 0x8 rflags 0x10206 __ALIGN_SIZE+0xf206 rsp 0xffff80002a31b9a0 ss 0 malloc+0x855: movq 0x8(%rbx),%r14 ddb{0}> show proc PROC (syz-executor) tid=423399 pid=16198 tcnt=3 stat=onproc flags process=10 proc=4000000 runpri=50, usrpri=50, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800045fe87e8,0xffffffff83a6cf20 process=0xffff800045fe4ea8 user=0xffff80002a317000, vmspace=0xffffee0069971218 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND 16198 265376 37593 32767 7 0x10 0 syz-executor 16198 272751 37593 32767 2 0x10 0x4000000 syz-executor *16198 423399 37593 32767 7 0x10 0x4000000 syz-executor 52486 15833 15312 0 3 0x2 0 clonelk ifconfig 15312 417894 29946 0 3 0x100002 0x88 sigsusp sh 29946 84460 41794 0 3 0 0x80 wait syz-executor 41794 136004 60649 0 3 0x2 0x80 wait syz-executor 86751 173143 26046 0 3 0x2 0 clonelk ifconfig 26046 154197 30064 0 3 0x100002 0x88 sigsusp sh 30064 96151 57 0 3 0 0x80 wait syz-executor 57 229300 60649 0 3 0x2 0x80 wait syz-executor 50438 461343 54775 32767 3 0x10 0x80 nanoslp syz-executor 50438 229883 54775 32767 3 0x10 0x4000080 ttyin syz-executor 50438 367675 54775 32767 3 0x10 0x4000080 fsleep syz-executor 69485 430219 83555 0 3 0x2 0 clonelk ifconfig 83555 265049 7334 0 3 0x100002 0x88 sigsusp sh 7334 319573 26733 0 3 0 0x80 wait syz-executor 26733 379563 60649 0 3 0x2 0x80 wait syz-executor 96724 103663 254 0 3 0 0 clonelk syz-executor 254 341401 60649 0 3 0x2 0x80 wait syz-executor 8500 107905 60649 0 3 0x2 0x80 wait syz-executor 54775 44750 62336 32767 3 0x10 0x80 nanoslp syz-executor 62336 399495 60649 0 3 0x2 0x80 wait syz-executor 67013 231380 3379 32767 3 0x10 0x80 nanoslp syz-executor 3379 61546 60649 0 3 0x2 0x80 wait syz-executor 37593 492826 93923 32767 3 0x10 0x80 nanoslp syz-executor 93923 424508 60649 0 3 0x2 0x80 wait syz-executor 60649 101462 60411 0 3 0x2 0x80 kqread syz-executor 60411 93412 46415 0 3 0x100002 0x88 sigsusp ksh 46415 136482 17492 0 3 0x10 0x88 kqread sshd-session 17492 73112 87097 0 3 0x12 0x80 kqread sshd-session 2974 460863 1 0 3 0x100003 0x80 ttyin getty 87097 125581 1 0 3 0 0x88 kqread sshd 35594 170117 30925 73 3 0x1100010 0x80 kqread syslogd 30925 381029 1 0 3 0x100002 0x80 sbwait syslogd 1352 371264 1 0 3 0x100000 0x80 kqread resolvd 96149 246275 91629 77 3 0x100012 0x80 kqread dhcpleased 39551 335097 91629 77 3 0x100012 0x80 kqread dhcpleased 91629 161294 1 0 3 0 0x80 kqread dhcpleased 45608 188095 0 0 3 0x14000 0x200 bored smr 76593 355130 0 0 3 0x14000 0x200 pgzero zerothread 56421 43753 0 0 3 0x14000 0x200 aiodoned aiodoned 74910 18331 0 0 3 0x14000 0x200 syncer update 40434 353393 0 0 3 0x14000 0x200 cleaner cleaner 59361 17822 0 0 3 0x14000 0x200 reaper reaper 74301 344248 0 0 3 0x14000 0x200 pgdaemon pagedaemon 46324 495457 0 0 3 0x14000 0x200 bored viomb 81293 266623 0 0 3 0x14000 0x40000200 acpi0 acpi0 62001 327977 0 0 3 0x14000 0x40000200 idle1 13048 511762 0 0 3 0x14000 0x200 bored softnet1 31314 208216 0 0 3 0x14000 0x200 bored softnet0 70385 462521 0 0 3 0x14000 0x200 smrbar systqmp 97323 265327 0 0 3 0x14000 0x200 bored systq 59081 212185 0 0 3 0x14000 0x200 tmoslp softclockmp 73574 472984 0 0 3 0x14000 0x40000200 tmoslp softclock 73570 216619 0 0 3 0x14000 0x40000200 idle0 1 390591 0 0 3 0x2 0x80 wait init 0 0 -1 0 3 0x10000 0x200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex /syzkaller/managers/setuid/kernel/sys/kern/kern_malloc.c:96 r = 0 (0xffffffff83907cb8) #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 amap_alloc1+0x291 sys/uvm/uvm_amap.c:356 #4 amap_alloc+0xad sys/uvm/uvm_amap.c:-1 #5 amap_copy+0x6a8 sys/uvm/uvm_amap.c:570 #6 uvm_fault_check+0x473 sys/uvm/uvm_fault.c:747 #7 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #8 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:194 #9 usertrap+0x430 sys/arch/amd64/amd64/trap.c:648 #10 recall_trap+0x8 Process 16198 (syz-executor) thread 0xffff800045fe9778 (423399) exclusive rwlock vmmaplk r = 0 (0xffffee0069971318) #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 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:194 #6 usertrap+0x430 sys/arch/amd64/amd64/trap.c:648 #7 recall_trap+0x8 exclusive mutex /syzkaller/managers/setuid/kernel/sys/kern/kern_malloc.c:96 r = 0 (0xffffffff83907cb8) #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 amap_alloc1+0x291 sys/uvm/uvm_amap.c:356 #4 amap_alloc+0xad sys/uvm/uvm_amap.c:-1 #5 amap_copy+0x6a8 sys/uvm/uvm_amap.c:570 #6 uvm_fault_check+0x473 sys/uvm/uvm_fault.c:747 #7 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #8 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:194 #9 usertrap+0x430 sys/arch/amd64/amd64/trap.c:648 #10 recall_trap+0x8 Process 70385 (systqmp) thread 0xffff800045ffe530 (462521) shared rwlock systqmp r = 0 (0xffffffff8392b898) #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{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11038 12009K 12034K 166960K 12162 0 pcb 17 12K 12K 166960K 17 0 rtable 149 4K 7K 166960K 559 0 pf 23 15K 16K 166960K 45 0 ifaddr 26 4K 7K 166960K 74 0 ifgroup 34 1K 2K 166960K 78 0 sysctl 3 1K 9K 166960K 8 0 counters 62 36K 37K 166960K 84 0 ioctlops 0 0K 2K 166960K 36 0 iov 0 0K 8K 166960K 4 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1287 81K 81K 166960K 1517 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 9 1K 1K 166960K 43 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1734 201K 291K 166960K 11964 0 file desc 27 101K 129K 166960K 385 0 sigio 0 0K 0K 166960K 2 0 proc 79 147K 147K 166960K 730 0 subproc 72 4K 4K 166960K 171 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 27 0 in_multi 55 3K 6K 166960K 188 0 ether_multi 1 0K 0K 166960K 6 0 mrt 1 0K 0K 166960K 6 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 61 281K 281K 166960K 61 0 exec 0 0K 1K 166960K 460 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 229 178K 180K 166960K 4523 0 UVM aobj 4 2K 2K 166960K 4 0 pinsyscall 48 96K 116K 166960K 1653 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 6 0 NDP 9 0K 2K 166960K 48 0 temp 36 9118K 9154K 166960K 4561 0 kqueue 14 22K 25K 166960K 43 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 28 0 0 1 0 1 1 0 8 0 rtpcb 120 49 0 46 1 0 1 1 0 8 0 rtentry 176 189 0 123 6 0 6 6 0 8 0 unpcb 144 116 0 101 2 0 2 2 0 8 1 syncache 336 5 0 5 1 0 1 1 0 8 1 tcpcb 736 47 0 43 1 0 1 1 0 8 0 arp 136 32 0 22 1 0 1 1 0 8 0 inpcb 328 217 0 207 4 0 4 4 0 8 2 nd6 152 46 0 34 1 0 1 1 0 8 0 kcovpl 48 19 0 11 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 778 0 455 31 0 31 31 0 8 3 art_table 40 779 0 455 6 0 6 6 0 8 0 art_node 32 189 0 122 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 3 1 0 1 1 0 8 1 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 72 8 0 1 1 0 1 1 0 8 0 shmpl 120 1 0 0 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 1770 0 284 93 0 93 93 0 8 0 ffsino 296 1770 0 284 115 0 115 115 0 8 0 nchpl 144 2089 0 368 64 0 64 64 0 8 0 vnodes 216 1950 0 0 109 0 109 109 0 8 0 namei 1024 8146 0 8146 3 1 2 2 0 8 2 percpumem 16 58 0 11 1 0 1 1 0 8 0 kstatmem 264 39 0 22 2 0 2 2 0 8 0 scxspl 216 7144 0 7144 4 3 1 3 1 8 1 plimitpl 152 139 0 114 2 0 2 2 0 8 0 sigapl 424 652 0 597 7 0 7 7 0 8 0 knotepl 120 311 0 0 10 0 10 10 0 8 0 kqueuepl 224 82 0 72 3 0 3 3 0 8 2 pipepl 344 162 0 135 3 0 3 3 0 8 0 fdescpl 528 636 0 597 4 0 4 4 0 8 1 filepl 160 2760 0 2550 12 0 12 12 0 8 2 lockfpl 104 38 0 36 1 0 1 1 0 8 0 lockfspl 48 17 0 15 1 0 1 1 0 8 0 sessionpl 144 38 0 22 1 0 1 1 0 8 0 pgrppl 48 57 0 33 1 0 1 1 0 8 0 ucredpl 104 446 0 431 1 0 1 1 0 8 0 zombiepl 144 599 0 597 1 0 1 1 0 8 0 processpl 1240 652 0 597 5 0 5 5 0 8 0 procpl 664 856 0 797 7 0 7 7 0 8 1 sosppl 176 2 0 2 1 0 1 1 0 8 1 sockpl 752 383 0 355 7 0 7 7 0 8 3 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 117 0 0 15 0 15 15 0 8 0 mcl2k 2048 21 0 0 3 0 3 3 0 8 0 mextrefs 64 22 0 0 1 0 1 1 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 177 0 0 12 0 12 12 0 8 0 bufpl 272 2498 0 102 160 0 160 160 0 8 0 anonpl 32 5392 0 0 44 0 44 44 0 247 0 amapchunkpl 152 12764 0 12318 29 0 29 29 0 158 9 amappl16 200 1570 0 1558 5 3 2 5 0 8 0 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 542 0 538 1 0 1 1 0 8 0 amappl13 176 224 0 214 1 0 1 1 0 8 0 amappl12 168 896 0 865 2 0 2 2 0 8 0 amappl11 160 7 0 7 1 1 0 1 0 8 0 amappl10 152 59 0 49 1 0 1 1 0 8 0 amappl9 144 268 0 268 1 1 0 1 0 8 0 amappl8 136 124 0 120 1 0 1 1 0 8 0 amappl7 128 150 0 139 1 0 1 1 0 8 0 amappl6 120 225 0 218 1 0 1 1 0 8 0 amappl5 112 90 0 82 1 0 1 1 0 8 0 amappl4 104 269 0 256 1 0 1 1 0 8 0 amappl3 96 2273 0 2186 4 1 3 3 0 8 0 amappl2 88 718 0 645 2 0 2 2 0 8 0 amappl1 80 11417 0 10842 14 0 14 14 0 8 1 amappl 88 3714 0 3553 5 0 5 5 0 92 0 uvmvnodes 80 99 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 0 1 0 1 1 0 8 0 uaddrrnd 24 636 0 597 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 636 0 597 1 0 1 1 0 8 0 vmmpekpl 168 6838 0 6779 4 0 4 4 0 8 0 vmmpepl 168 48661 0 46715 94 0 94 94 0 357 3 vmsppl 488 635 0 597 7 1 6 6 0 8 0 rwobjpl 80 16412 0 15459 23 0 23 23 0 8 2 pdppl 4096 1279 0 1194 113 26 87 99 0 8 2 pvpl 32 12890 0 0 104 0 104 104 0 265 0 pmappl 256 635 0 597 4 1 3 3 0 8 0 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 112 446 0 30 12 0 12 12 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace malloc(10,62,2) at malloc+0x855 sys/kern/kern_malloc.c:294 amap_alloc1(20,2,0) at amap_alloc1+0x291 sys/uvm/uvm_amap.c:356 amap_alloc(20000,2,0) at amap_alloc+0xad sys/uvm/uvm_amap.c:-1 amap_copy(ffffee0069971218,ffffee0069b9ccb0,2,0,df839644000,df839644001) at amap_copy+0x6a8 sys/uvm/uvm_amap.c:570 uvm_fault_check(ffff80002a31bdc0,ffff80002a31bdf8,ffff80002a31be30,0) at uvm_fault_check+0x473 sys/uvm/uvm_fault.c:747 uvm_fault(ffffee0069971218,df839644000,0,2) at uvm_fault+0x106 sys/uvm/uvm_fault.c:627 upageflttrap(ffff80002a31bf60,df839644578) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:194 usertrap(ffff80002a31bf60) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:648 recall_trap() at recall_trap+0x8 end trace frame: 0x0, count: -9 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff80002999dff0) 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 end of kernel end trace frame: 0x71cd695b9a90, count: -3