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(c,62,a) at malloc+0x855 sys/kern/kern_malloc.c:294 amap_splitref(ffffee806d1c8748,ffffee806f926880,2000) at amap_splitref+0x130 amap_pp_establish sys/uvm/uvm_amap.c:858 [inline] amap_splitref(ffffee806d1c8748,ffffee806f926880,2000) at amap_splitref+0x130 sys/uvm/uvm_amap.c:839 uvm_map_splitentry(ffffee806d171030,ffffee806d1c86d8,ffffee806f926810,45c4c82e000) at uvm_map_splitentry+0x176 sys/uvm/uvm_map.c:2604 uvm_map_immutable(ffffee806d171030,45c4c82c000,45c4c82e000,1) at uvm_map_immutable+0x3e9 uvm_map_clip_end sys/uvm/uvm_map.c:-1 [inline] uvm_map_immutable(ffffee806d171030,45c4c82c000,45c4c82e000,1) at uvm_map_immutable+0x3e9 sys/uvm/uvm_map.c:4136 syscall(ffff80002a3363c0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3363c0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:791 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x75cd12374630, count: -6 ddb{0}> show registers rdi 0xa58072635b6dc438 rsi 0 rbp 0xffff80002a336190 rbx 0xa58072635b6dc438 rdx 0 rcx 0xffff80003c3e0d20 rax 0xffffffff83933ff0 cpu_info_full_primary+0x1ff0 r8 0xffffffff81ad57e0 uvm_map_inentry_sp r9 0x3 r10 0x96d2b6d04ae5c776 r11 0xd28f56d1e4150d56 r12 0 r13 0xffffffff83b3f560 kmemstats+0x1880 r14 0xa30c333 __kernel_phys_end+0x670c333 r15 0xa58072635b6dc438 rip 0xffffffff83145a15 malloc+0x855 cs 0x8 rflags 0x10282 __ALIGN_SIZE+0xf282 rsp 0xffff80002a3360d0 ss 0x10 malloc+0x855: movq 0x8(%rbx),%r14 ddb{0}> show proc PROC (sshd-auth) tid=63348 pid=22832 tcnt=1 stat=onproc flags process=2 proc=0 runpri=50, usrpri=51, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c3e0fb8,0xffffffff83a0c500 process=0xffff800045fe5360 user=0xffff80002a331000, vmspace=0xffffee806d171030 estcpu=1, cpticks=3, pctcpu=0.0, user=0, sys=3, intr=0 ddb{0}> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND *22832 63348 58818 0 7 0x2 0 sshd-auth 25780 943 92802 32767 7 0x10 0 syz-executor 25780 406836 92802 32767 2 0x10 0x4000000 syz-executor 58818 129729 28112 0 3 0x2 0x80 kqread sshd-session 87987 520642 47508 0 3 0x2 0 clonelk ifconfig 47508 287497 39905 0 3 0x100002 0x88 sigsusp sh 39905 507316 47545 0 3 0 0x80 wait syz-executor 47545 292550 55969 0 3 0x2 0x80 wait syz-executor 39765 185939 14788 32767 3 0x10 0x80 nanoslp syz-executor 39765 69034 14788 32767 3 0x10 0x4000080 sbwait syz-executor 39765 88574 14788 32767 3 0x10 0x4000080 fsleep syz-executor 24910 204109 95665 32767 3 0x10 0x80 piperd syz-executor 95665 510327 55969 0 3 0x2 0x80 wait syz-executor 14788 63181 20843 32767 3 0x10 0x80 nanoslp syz-executor 20843 84912 55969 0 3 0x2 0x80 wait syz-executor 24018 121566 63488 32767 3 0x10 0x80 piperd syz-executor 63488 356668 55969 0 3 0x2 0x80 wait syz-executor 92802 274580 23994 32767 3 0x10 0x80 nanoslp syz-executor 23994 501241 55969 0 3 0x2 0x80 wait syz-executor 95074 417999 55969 0 3 0x2 0x80 wait syz-executor 96414 148205 37225 32767 3 0x10 0x80 piperd syz-executor 37225 405992 55969 0 3 0x2 0x80 wait syz-executor 55969 276867 99993 0 3 0x2 0x80 nanoslp syz-executor 99993 178970 91601 0 3 0x100002 0x88 sigsusp ksh 91601 421199 79875 0 3 0x10 0x88 kqread sshd-session 79875 411512 28112 0 3 0x12 0x80 kqread sshd-session 73968 77304 1 0 3 0x100003 0x80 ttyin getty 28112 491098 1 0 3 0 0x88 kqread sshd 15079 520293 57195 73 3 0x1100010 0 ffs_fsync syslogd 57195 400984 1 0 3 0x100002 0x80 sbwait syslogd 12141 411494 1 0 3 0x100000 0x80 kqread resolvd 7259 254864 27167 77 3 0x100012 0x80 kqread dhcpleased 21567 26311 27167 77 3 0x100012 0x80 kqread dhcpleased 27167 204892 1 0 3 0 0x80 kqread dhcpleased 77978 418889 0 0 3 0x14000 0x200 bored smr 18527 296103 0 0 2 0x14000 0x200 zerothread 55836 66740 0 0 3 0x14000 0x200 aiodoned aiodoned 23642 240062 0 0 3 0x14000 0x200 syncer update 5165 404017 0 0 3 0x14000 0x200 cleaner cleaner 79960 121221 0 0 3 0x14000 0x200 reaper reaper 38613 17381 0 0 3 0x14000 0x200 pgdaemon pagedaemon 48748 180121 0 0 3 0x14000 0x200 bored viomb 50232 75577 0 0 3 0x14000 0x40000200 acpi0 acpi0 36780 400921 0 0 3 0x14000 0x40000200 idle1 91166 351691 0 0 3 0x14000 0x200 bored softnet1 25724 452393 0 0 3 0x14000 0x200 bored softnet0 42421 374478 0 0 3 0x14000 0x200 smrbar systqmp 9091 120259 0 0 3 0x14000 0x200 bored systq 2997 224917 0 0 3 0x14000 0x200 tmoslp softclockmp 1428 39539 0 0 3 0x14000 0x40000200 tmoslp softclock 99485 161843 0 0 3 0x14000 0x40000200 idle0 1 275635 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 (0xffffffff839ce078) #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_splitref+0x130 amap_pp_establish sys/uvm/uvm_amap.c:858 [inline] #3 amap_splitref+0x130 sys/uvm/uvm_amap.c:839 #4 uvm_map_splitentry+0x176 sys/uvm/uvm_map.c:2604 #5 uvm_map_immutable+0x3e9 uvm_map_clip_end sys/uvm/uvm_map.c:-1 [inline] #5 uvm_map_immutable+0x3e9 sys/uvm/uvm_map.c:4136 #6 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb17 sys/arch/amd64/amd64/trap.c:791 #7 Xsyscall+0x128 Process 22832 (sshd-auth) thread 0xffff80003c3e0d20 (63348) exclusive rwlock amaplk r = 0 (0xffffee806d40c190) #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 amap_splitref+0x95 sys/uvm/uvm_amap.c:834 #3 uvm_map_splitentry+0x176 sys/uvm/uvm_map.c:2604 #4 uvm_map_immutable+0x3e9 uvm_map_clip_end sys/uvm/uvm_map.c:-1 [inline] #4 uvm_map_immutable+0x3e9 sys/uvm/uvm_map.c:4136 #5 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xb17 sys/arch/amd64/amd64/trap.c:791 #6 Xsyscall+0x128 exclusive rwlock vmmaplk r = 0 (0xffffee806d171130) #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 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5170 #3 uvm_map_immutable+0xb0 sys/uvm/uvm_map.c:4121 #4 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #4 syscall+0xb17 sys/arch/amd64/amd64/trap.c:791 #5 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a1f7c0) #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:791 #2 Xsyscall+0x128 exclusive mutex /syzkaller/managers/setuid/kernel/sys/kern/kern_malloc.c:96 r = 0 (0xffffffff839ce078) #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_splitref+0x130 amap_pp_establish sys/uvm/uvm_amap.c:858 [inline] #3 amap_splitref+0x130 sys/uvm/uvm_amap.c:839 #4 uvm_map_splitentry+0x176 sys/uvm/uvm_map.c:2604 #5 uvm_map_immutable+0x3e9 uvm_map_clip_end sys/uvm/uvm_map.c:-1 [inline] #5 uvm_map_immutable+0x3e9 sys/uvm/uvm_map.c:4136 #6 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb17 sys/arch/amd64/amd64/trap.c:791 #7 Xsyscall+0x128 Process 15079 (syslogd) thread 0xffff80002a22da00 (520293) exclusive rrwlock inode r = 0 (0xffffee80780f8c88) #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:576 #5 sys_fsync+0x144 sys/kern/vfs_syscalls.c:2890 #6 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb17 sys/arch/amd64/amd64/trap.c:791 #7 Xsyscall+0x128 Process 42421 (systqmp) thread 0xffff800045ffe7c8 (374478) shared rwlock systqmp r = 0 (0xffffffff8399a6f8) #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 11043 12013K 12034K 166960K 12167 0 pcb 17 12K 12K 166960K 17 0 rtable 195 5K 6K 166960K 626 0 pf 27 16K 16K 166960K 49 0 ifaddr 34 6K 7K 166960K 82 0 ifgroup 42 1K 2K 166960K 86 0 sysctl 1 1K 9K 166960K 5 0 counters 66 36K 37K 166960K 88 0 ioctlops 0 0K 2K 166960K 41 0 iov 0 0K 4K 166960K 3 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1287 81K 81K 166960K 1514 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 5 0 VM map 2 1K 1K 166960K 2 0 sem 7 0K 0K 166960K 8 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 20 73K 129K 166960K 393 0 sigio 0 0K 0K 166960K 4 0 proc 65 115K 163K 166960K 762 0 subproc 63 3K 4K 166960K 225 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 16 0 in_multi 77 5K 6K 166960K 199 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 4 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 498 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 216 177K 187K 166960K 4633 0 UVM aobj 7 2K 2K 166960K 8 0 pinsyscall 45 90K 112K 166960K 1751 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 5 0 NDP 13 0K 2K 166960K 54 0 temp 31 9118K 9134K 166960K 5435 0 kqueue 15 24K 24K 166960K 33 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 60 0 57 1 0 1 1 0 8 0 rtentry 176 211 0 122 5 0 5 5 0 8 0 unpcb 144 104 0 84 1 0 1 1 0 8 0 syncache 336 6 0 6 1 0 1 1 0 8 1 tcpcb 736 145 0 136 7 0 7 7 0 8 6 arp 136 36 0 22 1 0 1 1 0 8 0 inpcb 328 277 0 262 7 0 7 7 0 8 5 ip6q 80 1 0 0 1 0 1 1 0 8 0 ip6af 40 2 0 0 1 0 1 1 0 8 0 nd6 152 52 0 33 1 0 1 1 0 8 0 kcovpl 48 25 0 18 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 854 0 440 29 1 28 29 0 8 2 art_table 40 855 0 440 5 0 5 5 0 8 0 art_node 32 211 0 130 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 2 1 0 1 1 0 8 1 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 72 6 0 1 1 0 1 1 0 8 0 shmpl 112 5 0 1 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 1694 0 197 94 0 94 94 0 8 0 ffsino 296 1694 0 197 116 0 116 116 0 8 0 nchpl 144 1979 0 255 65 0 65 65 0 8 0 vnodes 216 1928 0 0 108 0 108 108 0 8 0 namei 1024 7861 0 7861 3 1 2 2 0 8 2 percpumem 16 60 0 11 1 0 1 1 0 8 0 kstatmem 264 43 0 22 2 0 2 2 0 8 0 scxspl 216 6814 0 6813 4 3 1 3 1 8 0 plimitpl 152 81 0 59 2 0 2 2 0 8 0 sigapl 424 661 0 611 7 0 7 7 0 8 0 knotepl 120 90 0 0 3 0 3 3 0 8 0 kqueuepl 224 39 0 28 1 0 1 1 0 8 0 pipepl 344 179 0 151 4 0 4 4 0 8 0 fdescpl 528 645 0 611 4 0 4 4 0 8 1 filepl 160 2394 0 2187 12 0 12 12 0 8 2 lockfpl 104 32 0 30 1 0 1 1 0 8 0 lockfspl 48 13 0 11 1 0 1 1 0 8 0 sessionpl 144 45 0 29 1 0 1 1 0 8 0 pgrppl 48 72 0 49 1 0 1 1 0 8 0 ucredpl 104 266 0 249 1 0 1 1 0 8 0 zombiepl 144 612 0 611 1 0 1 1 0 8 0 processpl 1232 661 0 611 5 0 5 5 0 8 0 procpl 664 809 0 756 6 0 6 6 0 8 0 sosppl 176 4 0 2 1 0 1 1 0 8 0 sockpl 752 443 0 405 11 0 11 11 0 8 6 mcl64k 65536 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 109 0 0 14 0 14 14 0 8 0 mcl2k 2048 23 0 0 3 0 3 3 0 8 0 mextrefs 64 20 0 0 1 0 1 1 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 166 0 0 11 0 11 11 0 8 0 bufpl 272 2398 0 102 154 0 154 154 0 8 0 anonpl 32 7247 0 0 59 0 59 59 0 247 0 amapchunkpl 152 13075 0 12541 26 0 26 26 0 158 1 amappl16 200 2186 0 2172 15 1 14 14 0 8 11 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 521 0 519 1 0 1 1 0 8 0 amappl13 176 137 0 125 1 0 1 1 0 8 0 amappl12 168 917 0 887 2 0 2 2 0 8 0 amappl11 160 6 0 6 1 1 0 1 0 8 0 amappl10 152 59 0 49 1 0 1 1 0 8 0 amappl9 144 275 0 275 1 1 0 1 0 8 0 amappl8 136 225 0 223 1 0 1 1 0 8 0 amappl7 128 161 0 148 1 0 1 1 0 8 0 amappl6 120 244 0 241 1 0 1 1 0 8 0 amappl5 112 105 0 96 1 0 1 1 0 8 0 amappl4 104 300 0 285 1 0 1 1 0 8 0 amappl3 96 2238 0 2160 4 1 3 3 0 8 0 amappl2 88 767 0 688 2 0 2 2 0 8 0 amappl1 80 12678 0 12017 17 0 17 17 0 8 3 amappl 88 3739 0 3597 4 0 4 4 0 92 0 uvmvnodes 80 98 0 0 2 0 2 2 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 7 0 1 1 0 1 1 0 8 0 uaddrrnd 24 645 0 611 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 645 0 611 1 0 1 1 0 8 0 vmmpekpl 168 7428 0 7367 3 0 3 3 0 8 0 vmmpepl 168 52029 0 50093 96 0 96 96 0 357 8 vmsppl 488 644 0 611 7 1 6 6 0 8 1 rwobjpl 80 18242 0 17219 26 1 25 26 0 8 2 pdppl 4096 1297 0 1222 119 38 81 99 0 8 6 pvpl 32 14013 0 0 115 1 114 114 0 265 0 pmappl 256 644 0 611 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 448 0 43 12 0 12 12 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace malloc(c,62,a) at malloc+0x855 sys/kern/kern_malloc.c:294 amap_splitref(ffffee806d1c8748,ffffee806f926880,2000) at amap_splitref+0x130 amap_pp_establish sys/uvm/uvm_amap.c:858 [inline] amap_splitref(ffffee806d1c8748,ffffee806f926880,2000) at amap_splitref+0x130 sys/uvm/uvm_amap.c:839 uvm_map_splitentry(ffffee806d171030,ffffee806d1c86d8,ffffee806f926810,45c4c82e000) at uvm_map_splitentry+0x176 sys/uvm/uvm_map.c:2604 uvm_map_immutable(ffffee806d171030,45c4c82c000,45c4c82e000,1) at uvm_map_immutable+0x3e9 uvm_map_clip_end sys/uvm/uvm_map.c:-1 [inline] uvm_map_immutable(ffffee806d171030,45c4c82c000,45c4c82e000,1) at uvm_map_immutable+0x3e9 sys/uvm/uvm_map.c:4136 syscall(ffff80002a3363c0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3363c0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:791 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x75cd12374630, count: -6 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 Xsyscall() at Xsyscall+0x111 end of kernel end trace frame: 0x73f072fd05d0, count: -4