panic: kernel diagnostic assertion "nlevel >= IPL_NONE" failed: file "/syzkaller/managers/setuid/kernel/sys/arch/amd64/amd64/intr.c", line 699 Stopped at db_enter+0x1c: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 181774 82611 0 0x14000 0x200 1 softnet0 db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8279dc9a) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff82820322,ffffffff8283c727,2bb,ffffffff827a1c2e) at __assert+0x29 sys/kern/subr_prf.c:157 splraise(bddd188a) at splraise+0xb4 sys/arch/amd64/amd64/intr.c:699 mtx_enter_try(fffffd806f5760d8) at mtx_enter_try+0x73 sys/kern/kern_lock.c:291 mtx_enter(fffffd806f5760d8) at mtx_enter+0x4f sys/kern/kern_lock.c:266 knote_remove(ffff800021224020,fffffd806f5760d8,fffffd806f576160,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff800021224020,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff800021224020) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff800021224020,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff800021224020,ffff8000212b6f40,ffff8000212b6f90) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff8000212b7010) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff8000212b7010) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7ddce9c03610, count: 2 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: kernel diagnostic assertion "nlevel >= IPL_NONE" failed: file "/syzkaller/managers/setuid/kernel/sys/arch/amd64/amd64/intr.c", line 699 ddb{0}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8279dc9a) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff82820322,ffffffff8283c727,2bb,ffffffff827a1c2e) at __assert+0x29 sys/kern/subr_prf.c:157 splraise(bddd188a) at splraise+0xb4 sys/arch/amd64/amd64/intr.c:699 mtx_enter_try(fffffd806f5760d8) at mtx_enter_try+0x73 sys/kern/kern_lock.c:291 mtx_enter(fffffd806f5760d8) at mtx_enter+0x4f sys/kern/kern_lock.c:266 knote_remove(ffff800021224020,fffffd806f5760d8,fffffd806f576160,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff800021224020,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff800021224020) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff800021224020,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff800021224020,ffff8000212b6f40,ffff8000212b6f90) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff8000212b7010) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff8000212b7010) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7ddce9c03610, count: -13 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff8000212b6b80 rbx 0xffffffff82c20b9f cpu_info_full_primary+0x2b9f rdx 0x3fd rcx 0 rax 0x8f r8 0x101010101010101 r9 0x8080808080808080 r10 0x71f13b3198bebd16 r11 0xaeaff34147ea4b78 r12 0xffffffff82c209a0 cpu_info_full_primary+0x29a0 r13 0 r14 0 r15 0x1 rip 0xffffffff814c2d0c db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff8000212b6b70 ss 0x10 db_enter+0x1c: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor2671595043) pid=520868 stat=onproc flags process=1008 proc=2000 pri=0, usrpri=57, nice=20 forw=0xffffffffffffffff, list=0xffff80002120e018,0xffff8000212252c8 process=0xffff80002122ee28 user=0xffff8000212b2000, vmspace=0xfffffd806ffbe930 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 93827 385580 99054 0 2 0 syz-executor2671595043 81027 243170 50044 0 2 0 syz-executor2671595043 81027 287628 50044 0 2 0x4000000 syz-executor2671595043 16430 88674 96460 0 2 0 syz-executor2671595043 16430 59454 96460 0 2 0x4000000 syz-executor2671595043 46176 245491 79759 0 2 0 syz-executor2671595043 46176 160315 79759 0 2 0x4000000 syz-executor2671595043 87364 162022 48338 0 2 0 syz-executor2671595043 56227 429677 8469 0 2 0 syz-executor2671595043 56227 33521 8469 0 2 0x4000000 syz-executor2671595043 10425 162502 35804 0 2 0 syz-executor2671595043 10425 206139 35804 0 3 0x4000080 fsleep syz-executor2671595043 35804 282305 91289 0 3 0x80 nanoslp syz-executor2671595043 50044 128169 91289 0 3 0x80 nanoslp syz-executor2671595043 99054 224457 91289 0 2 0 syz-executor2671595043 8469 116724 91289 0 2 0 syz-executor2671595043 96460 314766 91289 0 3 0x80 nanoslp syz-executor2671595043 79759 128828 91289 0 2 0 syz-executor2671595043 67879 375579 91289 0 3 0x80 nanoslp syz-executor2671595043 48338 73442 91289 0 3 0x80 nanoslp syz-executor2671595043 91289 162350 90673 0 3 0x82 nanoslp syz-executor2671595043 90673 5348 31352 0 3 0x10008a sigsusp ksh 31352 93169 49718 0 3 0x9a kqread sshd 25361 77213 1 0 3 0x100083 ttyin getty 49718 333886 1 0 3 0x88 kqread sshd 64331 225304 63938 73 3 0x1100090 kqread syslogd 63938 26774 1 0 3 0x100082 netio syslogd 74270 152397 1 0 3 0x100080 kqread resolvd 91319 243517 8267 77 3 0x100092 kqread dhcpleased 97656 380143 8267 77 3 0x100092 kqread dhcpleased 8267 250925 1 0 3 0x80 kqread dhcpleased 27377 450208 0 0 3 0x14200 bored smr 71470 11616 0 0 2 0x14200 zerothread 93873 343269 0 0 3 0x14200 aiodoned aiodoned 18421 143447 0 0 3 0x14200 syncer update 39781 205717 0 0 3 0x14200 cleaner cleaner 69101 488611 0 0 2 0x14200 reaper 89096 295008 0 0 3 0x14200 pgdaemon pagedaemon 15439 20133 0 0 3 0x14200 bored viomb 43873 42250 0 0 3 0x40014200 acpi0 acpi0 57918 244005 0 0 3 0x40014200 idle1 38222 229032 0 0 3 0x14200 bored softnet3 57875 277050 0 0 3 0x14200 bored softnet2 65434 268857 0 0 3 0x14200 bored softnet1 82611 181774 0 0 7 0x14200 softnet0 73441 433567 0 0 3 0x14200 bored systqmp 40935 501825 0 0 3 0x14200 bored systq 18085 242464 0 0 3 0x40014200 bored softclock 58 463906 0 0 3 0x40014200 idle0 1 460126 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 82611 (softnet0) thread 0xffff8000211687f8 (181774) exclusive rwlock netlock r = 0 (0xffffffff82b88c40) #0 witness_lock+0x447 #1 if_netisr+0x1f sys/net/if.c:1046 #2 taskq_thread+0xe5 sys/kern/kern_task.c:450 #3 proc_trampoline+0x1c shared rwlock softnet0 r = 0 (0xffff80000002d070) #0 witness_lock+0x447 #1 taskq_thread+0xca sys/kern/kern_task.c:446 #2 proc_trampoline+0x1c ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10156 6389K 6420K 78643K 11234 0 pcb 13 8K 8K 78643K 13 0 rtable 58 1K 2K 78643K 112 0 pf 12 6K 6K 78643K 12 0 ifaddr 12 9K 9K 78643K 12 0 ifgroup 17 1K 1K 78643K 17 0 counters 44 33K 33K 78643K 44 0 ioctlops 0 0K 2K 78643K 21 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1174 73K 74K 78643K 1187 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 1K 78643K 2 0 VM map 2 1K 1K 78643K 2 0 sem 2 0K 0K 78643K 2 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 1 0K 0K 78643K 1 0 proc 55 78K 79K 78643K 246 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 in_multi 11 0K 0K 78643K 11 0 ether_multi 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 25 122K 122K 78643K 25 0 exec 0 0K 1K 78643K 246 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 8 62K 64K 78643K 10 0 UVM amap 133 7K 7K 78643K 3421 0 UVM aobj 3 2K 2K 78643K 3 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 3 0K 0K 78643K 3 0 temp 1 5904K 5968K 78643K 2869 0 kqueue 11 16K 22K 78643K 178 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 21 0 18 1 0 1 1 0 8 0 rtentry 112 23 0 1 1 0 1 1 0 8 0 unpcb 144 33 0 20 1 0 1 1 0 8 0 syncache 304 5 0 5 1 0 1 1 0 8 1 tcpqe 32 229 0 229 1 0 1 1 0 8 1 tcpcb 808 8 0 5 1 0 1 1 0 8 0 arp 120 2 0 0 1 0 1 1 0 8 0 inpcb 368 182 0 174 2 0 2 2 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 97 0 0 7 0 7 7 0 8 0 art_table 32 98 0 0 1 0 1 1 0 8 0 art_node 16 22 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1422 0 37 87 0 87 87 0 8 0 ffsino 272 1422 0 37 93 0 93 93 0 8 0 nchpl 144 1606 0 47 58 0 58 58 0 8 0 uvmvnodes 80 1431 0 0 30 0 30 30 0 8 0 vnodes 216 1431 0 0 80 0 80 80 0 8 0 namei 1024 4271 0 4271 2 1 1 1 0 8 1 percpumem 16 35 0 0 1 0 1 1 0 8 0 kstatmem 264 6 0 0 1 0 1 1 0 8 0 scxspl 216 4792 0 4792 4 2 2 2 1 8 2 plimitpl 152 16 0 10 1 0 1 1 0 8 0 sigapl 424 482 0 436 6 0 6 6 0 8 0 futexpl 64 390 0 389 1 0 1 1 0 8 0 knotepl 120 50 0 0 2 0 2 2 0 8 0 kqueuepl 216 178 0 171 1 0 1 1 0 8 0 pipepl 320 88 0 85 2 1 1 1 0 8 0 fdescpl 496 465 0 436 5 1 4 4 0 8 0 filepl 152 1288 0 1233 3 0 3 3 0 8 0 lockfpl 104 6 0 4 1 0 1 1 0 8 0 lockfspl 48 4 0 2 1 0 1 1 0 8 0 sessionpl 144 17 0 9 1 0 1 1 0 8 0 pgrppl 48 17 0 9 1 0 1 1 0 8 0 ucredpl 104 66 0 56 1 0 1 1 0 8 0 zombiepl 144 437 0 436 2 1 1 1 0 8 0 processpl 1072 482 0 436 4 0 4 4 0 8 0 procpl 680 646 0 594 5 0 5 5 0 8 0 sockpl 488 236 0 212 4 0 4 4 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 247 0 0 31 0 31 31 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 256 0 0 16 0 16 16 0 8 0 bufpl 288 2475 0 88 171 0 171 171 0 8 0 anonpl 24 174286 0 172198 26 3 23 24 0 186 10 amapchunkpl 152 11723 0 11456 14 1 13 13 0 158 2 amappl16 200 4892 0 4890 5 1 4 5 0 8 3 amappl15 192 13 0 13 1 1 0 1 0 8 0 amappl14 184 104 0 95 1 0 1 1 0 8 0 amappl13 176 11 0 11 1 1 0 1 0 8 0 amappl12 168 959 0 939 1 0 1 1 0 8 0 amappl11 160 51 0 41 1 0 1 1 0 8 0 amappl10 152 12 0 12 1 0 1 1 0 8 1 amappl9 144 156 0 156 2 1 1 1 0 8 1 amappl8 136 31 0 29 1 0 1 1 0 8 0 amappl7 128 183 0 166 1 0 1 1 0 8 0 amappl6 120 142 0 129 1 0 1 1 0 8 0 amappl5 112 106 0 98 1 0 1 1 0 8 0 amappl4 104 415 0 385 1 0 1 1 0 8 0 amappl3 96 3324 0 3262 2 0 2 2 0 8 0 amappl2 88 461 0 419 3 1 2 2 0 8 0 amappl1 80 9792 0 9326 12 1 11 11 0 8 0 amappl 88 3148 0 3053 3 0 3 3 0 92 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 466 0 437 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 466 0 437 1 0 1 1 0 8 0 vmmpekpl 168 7649 0 7630 2 0 2 2 0 8 0 vmmpepl 168 39640 0 38280 62 2 60 60 0 357 0 vmsppl 464 465 0 437 5 1 4 4 0 8 0 rwobjpl 56 19810 0 17715 31 1 30 31 0 8 0 pdppl 4096 940 0 874 82 16 66 66 0 8 0 pvpl 32 279320 0 274311 54 3 51 52 0 265 10 pmappl 248 465 0 437 3 1 2 2 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 506 0 19 14 0 14 14 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8279dc9a) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff82820322,ffffffff8283c727,2bb,ffffffff827a1c2e) at __assert+0x29 sys/kern/subr_prf.c:157 splraise(bddd188a) at splraise+0xb4 sys/arch/amd64/amd64/intr.c:699 mtx_enter_try(fffffd806f5760d8) at mtx_enter_try+0x73 sys/kern/kern_lock.c:291 mtx_enter(fffffd806f5760d8) at mtx_enter+0x4f sys/kern/kern_lock.c:266 knote_remove(ffff800021224020,fffffd806f5760d8,fffffd806f576160,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff800021224020,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff800021224020) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff800021224020,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff800021224020,ffff8000212b6f40,ffff8000212b6f90) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff8000212b7010) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff8000212b7010) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7ddce9c03610, count: -13 ddb{0}> machine ddbcpu 1