uvm_fault(0xffffffff8280d460, 0xfffffd000000001c, 0, 1) -> e kernel: page fault trap, code=0 Stopped at m_free+0x58: movswq 0x1c(%r14),%rsi ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic kernel page fault uvm_fault(0xffffffff8280d460, 0xfffffd000000001c, 0, 1) -> e m_free(fffffd0000000000) at m_free+0x58 sys/sys/percpu.h:125 end trace frame: 0xffff8000230fb3d0, count: 0 ddb{1}> trace m_free(fffffd0000000000) at m_free+0x58 sys/sys/percpu.h:125 ml_purge(ffff8000230fb3e8) at ml_purge+0x50 m_freem sys/kern/uipc_mbuf.c:538 [inline] ml_purge(ffff8000230fb3e8) at ml_purge+0x50 sys/kern/uipc_mbuf.c:1628 ifq_purge(ffff800000af1a78) at ifq_purge+0x9a sys/net/ifq.c:462 if_down(ffff800000af1800) at if_down+0x9c if_linkstate sys/net/if.c:1668 [inline] if_down(ffff800000af1800) at if_down+0x9c sys/net/if.c:1619 ifioctl(fffffd8067660b28,80206910,ffff8000230fb5b0,ffff800020e22eb8) at ifioctl+0x177d sys/net/if.c:2006 soo_ioctl(fffffd8067becd28,80206910,ffff8000230fb5b0,ffff800020e22eb8) at soo_ioctl+0x27c sys/kern/sys_socket.c:138 sys_ioctl(ffff800020e22eb8,ffff8000230fb6c8,ffff8000230fb710) at sys_ioctl+0x4a5 syscall(ffff8000230fb790) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000230fb790) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e975017cc0, count: -9 ddb{1}> show registers rdi 0x7 rsi 0x3403d acpi_pdirpa+0x1fea5 rbp 0xffff8000230fb390 rbx 0 rdx 0x3403c acpi_pdirpa+0x1fea4 rcx 0xffff800000676d80 rax 0x7 r8 0xffffffff82075562 tun_ioctl+0x42 r9 0x7 r10 0x1075988678966499 r11 0x2f515c23edcaab9a r12 0xfffffd807934ff00 r13 0x3 r14 0xfffffd0000000000 r15 0xfffffd0000000000 rip 0xffffffff8179fd08 m_free+0x58 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000230fb350 ss 0x10 m_free+0x58: movswq 0x1c(%r14),%rsi ddb{1}> show proc PROC (syz-executor.1) pid=383160 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=79, nice=20 forw=0xffffffffffffffff, list=0xffff800020e22018,0xffffffff828d74d0 process=0xffff800020e08020 user=0xffff8000230f6000, vmspace=0xfffffd807efff8a0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 8753 274451 3989 0 2 0 syz-executor.1 * 8753 383160 3989 0 7 0x4000000 syz-executor.1 8135 213574 19663 0 7 0 syz-executor.0 8135 52310 19663 0 2 0x4000000 syz-executor.0 70036 352871 0 0 3 0x14200 bored sosplice 3989 451741 15143 0 3 0x82 nanosleep syz-executor.1 19663 111255 15143 0 3 0x82 nanosleep syz-executor.0 15143 136720 3383 0 3 0x82 thrsleep syz-fuzzer 15143 432482 3383 0 3 0x4000082 nanosleep syz-fuzzer 15143 203339 3383 0 3 0x4000082 thrsleep syz-fuzzer 15143 468403 3383 0 3 0x4000082 thrsleep syz-fuzzer 15143 203230 3383 0 3 0x4000082 thrsleep syz-fuzzer 15143 42056 3383 0 3 0x4000082 thrsleep syz-fuzzer 15143 521711 3383 0 3 0x4000082 kqread syz-fuzzer 15143 94992 3383 0 3 0x4000082 thrsleep syz-fuzzer 15143 347855 3383 0 3 0x4000082 thrsleep syz-fuzzer 15143 287017 3383 0 3 0x4000082 thrsleep syz-fuzzer 3383 278502 85811 0 3 0x10008a pause ksh 85811 367055 87606 0 3 0x92 select sshd 71354 235929 1 0 3 0x100083 ttyin getty 87606 70726 1 0 3 0x80 select sshd 16616 350408 20886 74 3 0x100092 bpf pflogd 20886 136714 1 0 3 0x80 netio pflogd 30498 445433 98500 73 3 0x100090 kqread syslogd 98500 396858 1 0 3 0x100082 netio syslogd 12226 254912 1 77 3 0x100090 poll dhclient 3719 382737 1 0 3 0x80 poll dhclient 51138 11394 0 0 3 0x14200 bored smr 61376 234804 0 0 2 0x14200 zerothread 62255 362655 0 0 3 0x14200 aiodoned aiodoned 14139 117708 0 0 3 0x14200 syncer update 29428 278065 0 0 3 0x14200 cleaner cleaner 76229 398877 0 0 3 0x14200 reaper reaper 30713 501208 0 0 3 0x14200 pgdaemon pagedaemon 56944 321936 0 0 3 0x14200 bored crynlk 73738 403925 0 0 3 0x14200 bored crypto 11027 330725 0 0 3 0x40014200 acpi0 acpi0 7172 330704 0 0 3 0x40014200 idle1 78762 62065 0 0 3 0x14200 bored softnet 31024 378866 0 0 3 0x14200 bored systqmp 93985 221954 0 0 3 0x14200 bored systq 71903 105779 0 0 3 0x40014200 bored softclock 98197 263258 0 0 3 0x40014200 idle0 1 21421 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 8753 (syz-executor.1) thread 0xffff800020e22eb8 (383160) exclusive rwlock netlock r = 0 (0xffffffff8272df18) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 ifioctl+0x120b sys/net/if.c:1995 #2 soo_ioctl+0x27c sys/kern/sys_socket.c:138 #3 sys_ioctl+0x4a5 #4 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #4 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #5 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 1 (0xffffffff828e2dd8) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 soo_ioctl+0x26a sys/kern/sys_socket.c:138 #2 sys_ioctl+0x4a5 #3 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #3 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #4 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9520 6418K 6871K 78643K 10896 0 pcb 14 8K 8K 78643K 55 0 rtable 99 3K 3K 78643K 249 0 ifaddr 76 15K 15K 78643K 92 0 counters 43 33K 33K 78643K 43 0 ioctlops 0 0K 4K 78643K 1505 0 iov 0 0K 16K 78643K 33 0 mount 1 1K 1K 78643K 1 0 vnodes 1225 77K 77K 78643K 1309 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 7 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 38 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 6 17K 25K 78643K 231 0 sigio 0 0K 0K 78643K 1 0 proc 61 63K 83K 78643K 453 0 subproc 32 2K 2K 78643K 34 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 17 0 in_multi 46 2K 2K 78643K 93 0 ether_multi 1 0K 0K 78643K 8 0 mrt 0 0K 0K 78643K 2 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 49 228K 228K 78643K 49 0 exec 0 0K 1K 78643K 216 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 118 22K 24K 78643K 1678 0 UVM aobj 5 2K 2K 78643K 6 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 18 0 NDP 12 0K 0K 78643K 18 0 temp 108 3860K 3924K 78643K 2541 0 kqueue 3 4K 8K 78643K 12 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 8 0 1 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 29 0 27 1 0 1 1 0 8 0 rtentry 112 57 0 16 2 0 2 2 0 8 0 unpcb 120 211 0 199 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 175 0 175 2 2 0 1 0 8 0 tcpcb 544 78 0 74 1 0 1 1 0 8 0 inpcb 296 271 0 262 3 1 2 2 0 8 1 nd6 48 12 0 8 1 0 1 1 0 8 0 pffrag 232 1 0 0 1 0 1 1 0 482 0 pffrnode 88 1 0 0 1 0 1 1 0 8 0 pffrent 40 4 0 3 1 0 1 1 0 8 0 pfosfp 40 846 0 423 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 19 0 8 1 0 1 1 0 8 0 pfstkey 112 19 0 8 1 0 1 1 0 8 0 pfstate 328 19 0 8 2 0 2 2 0 8 0 pfsrctr 152 2 0 0 1 0 1 1 0 8 0 pfrule 1360 26 0 18 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 219 0 42 13 1 12 12 0 8 0 art_table 32 220 0 42 2 0 2 2 0 8 0 art_node 16 56 0 19 1 0 1 1 0 8 0 sysvmsgpl 40 24 0 7 1 0 1 1 0 8 0 semupl 112 4 0 4 1 1 0 1 0 8 0 semapl 112 30 0 20 1 0 1 1 0 8 0 shmpl 112 4 0 1 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1690 0 282 89 0 89 89 0 8 0 ffsino 272 1690 0 282 95 0 95 95 0 8 1 nchpl 144 2362 0 750 60 0 60 60 0 8 0 uvmvnodes 72 1798 0 0 33 0 33 33 0 8 0 vnodes 208 1798 0 0 95 0 95 95 0 8 0 namei 1024 6253 0 6253 2 1 1 1 0 8 1 percpumem 16 32 0 0 1 0 1 1 0 8 0 scxspl 192 6534 0 6534 8 7 1 7 0 8 1 plimitpl 152 29 0 21 1 0 1 1 0 8 0 sigapl 424 447 0 414 4 0 4 4 0 8 0 futexpl 56 3245 0 3245 2 1 1 1 0 8 1 knotepl 112 72 0 53 1 0 1 1 0 8 0 kqueuepl 144 35 0 33 1 0 1 1 0 8 0 pipepl 304 108 0 98 2 1 1 2 0 8 0 fdescpl 496 431 0 414 3 0 3 3 0 8 0 filepl 152 2665 0 2562 6 1 5 6 0 8 1 lockfpl 104 48 0 47 1 0 1 1 0 8 0 lockfspl 48 19 0 18 1 0 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 22 0 11 1 0 1 1 0 8 0 ucredpl 96 192 0 183 1 0 1 1 0 8 0 zombiepl 144 414 0 414 1 0 1 1 0 8 1 processpl 984 447 0 414 5 0 5 5 0 8 0 procpl 624 910 0 866 4 0 4 4 0 8 0 sosppl 128 6 0 6 2 1 1 1 0 8 1 sockpl 400 511 0 488 8 3 5 6 0 8 2 mcl64k 65536 8 0 0 1 0 1 1 0 8 0 mcl12k 12288 6 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 166 0 0 20 0 20 20 0 8 0 mtagpl 96 18 0 0 1 0 1 1 0 8 0 mbufpl 256 216 0 0 12 0 12 12 0 8 0 mbufpl: pool(0xffffffff828d8420:mbufpl): free list modified: page 0xfffffd806d1e6000; item ordinal 2; addr 0xfffffd806d1e6c00 (p 0xfffffd806e59d000); offset 0x0=0xeaa3210000000000 bufpl 280 3710 0 133 256 0 256 256 0 8 0 anonpl 16 63920 0 46808 87 4 83 83 0 124 14 amapchunkpl 152 2552 0 2401 15 7 8 14 0 158 1 amappl16 192 2243 0 1321 60 7 53 56 0 8 6 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 130 0 123 1 0 1 1 0 8 0 amappl13 168 28 0 25 1 0 1 1 0 8 0 amappl12 160 108 0 104 2 1 1 1 0 8 0 amappl11 152 168 0 150 1 0 1 1 0 8 0 amappl10 144 17 0 11 1 0 1 1 0 8 0 amappl9 136 144 0 143 1 0 1 1 0 8 0 amappl8 128 354 0 321 2 0 2 2 0 8 0 amappl7 120 116 0 105 1 0 1 1 0 8 0 amappl6 112 25 0 20 1 0 1 1 0 8 0 amappl5 104 811 0 794 1 0 1 1 0 8 0 amappl4 96 598 0 564 1 0 1 1 0 8 0 amappl3 88 219 0 210 1 0 1 1 0 8 0 amappl2 80 2434 0 2355 2 0 2 2 0 8 0 amappl1 72 19487 0 19038 23 13 10 18 0 8 0 amappl 80 1163 0 1117 2 0 2 2 0 84 0 dma4096 4096 1 0 1 1 1 0 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 64 5 0 1 1 0 1 1 0 8 0 uaddrrnd 24 431 0 414 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 431 0 414 1 0 1 1 0 8 0 vmmpekpl 168 7284 0 7250 2 0 2 2 0 8 0 vmmpepl 168 60178 0 58000 127 22 105 113 0 357 10 vmsppl 368 430 0 414 2 0 2 2 0 8 0 pdppl 4096 869 0 828 6 0 6 6 0 8 0 pvpl 32 193437 0 173098 199 2 197 197 0 265 32 pmappl 232 430 0 414 2 1 1 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 263 0 8 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff826f2ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352 x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff828e2bd0) at __mp_lock+0x127 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828e2bd0) at __mp_lock+0x127 sys/kern/kern_lock.c:147 softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:89 Xsoftclock() at Xsoftclock+0x1f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x36 kd_curproc sys/dev/kcov.c:411 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x36 sys/dev/kcov.c:79 clock_gettime(ffff800020e22768,0,ffff800020ed5508) at clock_gettime+0x9d sys/kern/kern_time.c:116 sys_clock_gettime(ffff800020e22768,ffff800020ed5570,ffff800020ed55c0) at sys_clock_gettime+0x4c sys/kern/kern_time.c:165 syscall(ffff800020ed5640) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020ed5640) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff0020, count: -11 ddb{0}> machine ddbcpu 1 Stopped at m_free+0x58: movswq 0x1c(%r14),%rsi ddb{1}> trace m_free(fffffd0000000000) at m_free+0x58 sys/sys/percpu.h:125 ml_purge(ffff8000230fb3e8) at ml_purge+0x50 m_freem sys/kern/uipc_mbuf.c:538 [inline] ml_purge(ffff8000230fb3e8) at ml_purge+0x50 sys/kern/uipc_mbuf.c:1628 ifq_purge(ffff800000af1a78) at ifq_purge+0x9a sys/net/ifq.c:462 if_down(ffff800000af1800) at if_down+0x9c if_linkstate sys/net/if.c:1668 [inline] if_down(ffff800000af1800) at if_down+0x9c sys/net/if.c:1619 ifioctl(fffffd8067660b28,80206910,ffff8000230fb5b0,ffff800020e22eb8) at ifioctl+0x177d sys/net/if.c:2006 soo_ioctl(fffffd8067becd28,80206910,ffff8000230fb5b0,ffff800020e22eb8) at soo_ioctl+0x27c sys/kern/sys_socket.c:138 sys_ioctl(ffff800020e22eb8,ffff8000230fb6c8,ffff8000230fb710) at sys_ioctl+0x4a5 syscall(ffff8000230fb790) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000230fb790) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e975017cc0, count: -9