¹j¼õ¬|ÿ ž¨E1\…:panic: kernel diagnostic assertion "ISSET(p->p_flag, P_SUSPSIG | P_SUSPSINGLE) == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_sig.c", line 1603 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *367232 49864 0 0x40009000 0xc080000 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff834c42ff) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff83507c5e,ffffffff8346f86e,643,ffffffff83451c4f) at __assert+0x29 sys/kern/subr_prf.c:-1 process_stop(ffff800039fa5d40,8000000,1) at process_stop+0x3fe cursig(ffff80003abb9248,ffff80002a338d68,0) at cursig+0x509 x86_atomic_setbits_u32 sys/arch/amd64/compile/SYZKALLER/obj/machine/atomic.h:-1 [inline] cursig(ffff80003abb9248,ffff80002a338d68,0) at cursig+0x509 sys/kern/kern_sig.c:1446 userret(ffff80003abb9248) at userret+0x203 sys/kern/kern_sig.c:2208 syscall(ffff80002a338ea0) at syscall+0x9ce mi_syscall_return sys/sys/syscall_mi.h:203 [inline] syscall(ffff80002a338ea0) at syscall+0x9ce sys/arch/amd64/amd64/trap.c:812 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xbd37a5b2530, count: 7 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 "ISSET(p->p_flag, P_SUSPSIG | P_SUSPSINGLE) == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_sig.c", line 1603 ddb{0}> show kasan No such command ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff834c42ff) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff83507c5e,ffffffff8346f86e,643,ffffffff83451c4f) at __assert+0x29 sys/kern/subr_prf.c:-1 process_stop(ffff800039fa5d40,8000000,1) at process_stop+0x3fe cursig(ffff80003abb9248,ffff80002a338d68,0) at cursig+0x509 x86_atomic_setbits_u32 sys/arch/amd64/compile/SYZKALLER/obj/machine/atomic.h:-1 [inline] cursig(ffff80003abb9248,ffff80002a338d68,0) at cursig+0x509 sys/kern/kern_sig.c:1446 userret(ffff80003abb9248) at userret+0x203 sys/kern/kern_sig.c:2208 syscall(ffff80002a338ea0) at syscall+0x9ce mi_syscall_return sys/sys/syscall_mi.h:203 [inline] syscall(ffff80002a338ea0) at syscall+0x9ce sys/arch/amd64/amd64/trap.c:812 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xbd37a5b2530, count: -8 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a338b80 rbx 0xffffffff8390de0f cpu_info_full_primary+0x2e0f rdx 0 rcx 0xffff80003abb9248 rax 0xffffffff8390cff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x214923b718183b6 r11 0xe0337019a3aecc26 r12 0xffffffff8390dc10 cpu_info_full_primary+0x2c10 r13 0 r14 0 r15 0x1 rip 0xffffffff8136ac65 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a338b70 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=367232 pid=49864 tcnt=2 stat=onproc flags process=40009000 proc=c080000 runpri=75, usrpri=70, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80003abb82b8 scnt=1 ecnt=1 forw=0xffffffffffffffff, list=0xffff800045fee2b0,0xffff80003abb82c8 process=0xffff800039fa5d40 user=0xffff80002a333000, vmspace=0xfffff700730b7d80 estcpu=20, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND 50582 2054 82197 0 3 0x2 0x80 wait syz-executor 82088 346951 82197 0 3 0x2 0x80 piperd syz-executor 37694 488765 82197 0 3 0x2 0x80 piperd syz-executor 97645 265559 82197 0 3 0x2 0x80 piperd syz-executor *49864 367232 76884 0 7 0x40009000 0xc080000 syz-executor 49864 220032 76884 0 3 0x40009000 0x4002000 suspend syz-executor 58842 281224 82197 0 3 0x2 0x80 piperd syz-executor 87531 438603 82197 0 3 0x2 0x80 piperd syz-executor 29704 346008 0 0 3 0x14000 0x280 nfsidl nfsio 32417 24901 0 0 3 0x14000 0x280 nfsidl nfsio 94873 457178 0 0 3 0x14000 0x280 nfsidl nfsio 74514 74050 0 0 3 0x14000 0x280 nfsidl nfsio 37852 7538 0 0 3 0x14000 0x280 nfsidl nfsio 44895 495826 0 0 3 0x14000 0x280 nfsidl nfsio 77437 439064 0 0 3 0x14000 0x280 nfsidl nfsio 9146 379998 0 0 3 0x14000 0x280 nfsidl nfsio 23221 371788 0 0 3 0x14000 0x280 nfsidl nfsio 68967 91091 0 0 3 0x14000 0x280 nfsidl nfsio 79623 21663 0 0 3 0x14000 0x280 nfsidl nfsio 4291 176576 0 0 3 0x14000 0x280 nfsidl nfsio 78732 136564 0 0 3 0x14000 0x280 nfsidl nfsio 67458 225524 0 0 3 0x14000 0x280 nfsidl nfsio 18117 320593 0 0 3 0x14000 0x280 nfsidl nfsio 53009 74864 0 0 3 0x14000 0x280 nfsidl nfsio 25733 385782 0 0 3 0x14000 0x280 nfsidl nfsio 42935 322268 0 0 3 0x14000 0x280 nfsidl nfsio 21715 492951 0 0 3 0x14000 0x280 nfsidl nfsio 4150 183416 0 0 3 0x14000 0x280 nfsidl nfsio 76884 489320 82197 0 3 0x2 0x80 wait syz-executor 82197 379706 72413 0 3 0x2 0x80 nanoslp syz-executor 72413 327367 58637 0 3 0x100002 0x88 sigsusp ksh 58637 107046 58665 0 3 0x10 0x88 kqread sshd-session 58665 388723 92298 0 3 0x12 0x80 kqread sshd-session 75565 293184 1 0 3 0x100003 0x80 ttyin getty 92298 154635 1 0 3 0 0x88 kqread sshd 7321 101793 45448 74 3 0x1100012 0x80 bpf pflogd 45448 216813 1 0 3 0 0x80 sbwait pflogd 8250 335913 23375 73 3 0x1100010 0x80 kqread syslogd 23375 329859 1 0 3 0x100002 0x80 sbwait syslogd 12679 89927 1 0 3 0x100000 0x80 kqread resolvd 83599 174365 28984 77 3 0x100012 0x80 kqread dhcpleased 17560 189574 28984 77 3 0x100012 0x80 kqread dhcpleased 28984 370510 1 0 3 0 0x80 kqread dhcpleased 85898 303287 0 0 3 0x14000 0x200 bored smr 42860 17049 0 0 3 0x14000 0x200 pgzero zerothread 28672 288015 0 0 3 0x14000 0x200 aiodoned aiodoned 34041 132675 0 0 3 0x14000 0x200 syncer update 81865 358112 0 0 3 0x14000 0x200 cleaner cleaner 54344 197439 0 0 2 0x14000 0x200 reaper 15613 282186 0 0 3 0x14000 0x200 pgdaemon pagedaemon 7951 30457 0 0 3 0x14000 0x200 bored viomb 42454 330978 0 0 3 0x14000 0x40000200 acpi0 acpi0 13461 258595 0 0 7 0x14000 0x40000200 idle1 79049 165043 0 0 3 0x14000 0x200 bored softnet1 75523 291732 0 0 3 0x14000 0x200 bored softnet0 23956 147260 0 0 3 0x14000 0x200 smrbar systqmp 70528 221884 0 0 3 0x14000 0x200 bored systq 49773 378745 0 0 3 0x14000 0x200 tmoslp softclockmp 36422 15362 0 0 3 0x14000 0x40000200 tmoslp softclock 22731 127003 0 0 3 0x14000 0x40000200 idle0 1 514960 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 &sched_lock r = 0 (0xffffffff83b306b8) #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 cursig+0x4ee sys/kern/kern_sig.c:1445 #3 userret+0x203 sys/kern/kern_sig.c:2208 #4 syscall+0x9ce mi_syscall_return sys/sys/syscall_mi.h:203 [inline] #4 syscall+0x9ce sys/arch/amd64/amd64/trap.c:812 #5 Xsyscall+0x128 exclusive mutex &pr->ps_mtx r = 0 (0xffff800039fa5e58) #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 cursig+0x4c2 sys/kern/kern_sig.c:1441 #3 userret+0x203 sys/kern/kern_sig.c:2208 #4 syscall+0x9ce mi_syscall_return sys/sys/syscall_mi.h:203 [inline] #4 syscall+0x9ce sys/arch/amd64/amd64/trap.c:812 #5 Xsyscall+0x128 CPU 1: exclusive mutex amappl12 r = 0 (0xffffffff83a18228) #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 uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1359 #4 uvm_map_teardown+0x360 sys/uvm/uvm_map.c:2536 #5 exit1+0x71b sys/kern/kern_exit.c:260 #6 sys_exit+0x1a sys/kern/kern_exit.c:-1 #7 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #7 syscall+0xb17 sys/arch/amd64/amd64/trap.c:791 #8 Xsyscall+0x128 Process 23956 (systqmp) thread 0xffff800045ffe000 (147260) shared rwlock systqmp r = 0 (0xffffffff838e7588) #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 11053 12083K 12158K 166960K 12358 0 pcb 18 16K 21K 166960K 334 0 rtable 232 9K 10K 166960K 1568 0 pf 32 17K 37K 166960K 184 0 ifaddr 39 7K 8K 166960K 217 0 ifgroup 51 2K 2K 166960K 241 0 sysctl 3 1K 9K 166960K 73 0 counters 68 36K 37K 166960K 180 0 ioctlops 0 0K 4K 166960K 1680 0 iov 0 0K 16K 166960K 8 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1325 83K 84K 166960K 1948 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 20K 20K 166960K 7 0 VM map 2 1K 1K 166960K 2 0 sem 13 0K 0K 166960K 19 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 10 33K 93K 166960K 918 0 proc 71 115K 180K 166960K 1673 0 subproc 63 3K 4K 166960K 423 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 11 0 in_multi 88 5K 6K 166960K 536 0 ether_multi 1 0K 0K 166960K 2 0 mrt 0 0K 0K 166960K 17 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 912 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 180 158K 184K 166960K 8197 0 UVM aobj 9 2K 2K 166960K 9 0 pinsyscall 35 70K 104K 166960K 3123 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 8 0 NDP 19 1K 2K 166960K 155 0 temp 39 9124K 9143K 166960K 19925 0 kqueue 14 22K 28K 166960K 67 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 120 136 0 133 1 0 1 1 0 8 0 rtentry 176 544 0 446 6 0 6 6 0 8 1 unpcb 144 287 0 268 1 0 1 1 0 8 0 syncache 336 7 0 7 2 1 1 1 0 8 1 tcpcb 736 175 0 171 4 0 4 4 0 8 3 arp 136 97 0 81 1 0 1 1 0 8 0 inpcb 328 774 0 766 18 10 8 15 0 8 7 nd6 152 141 0 121 1 0 1 1 0 8 0 pkpcb 40 2 0 2 2 1 1 1 0 8 1 kcovpl 48 47 0 40 1 0 1 1 0 8 0 ppxss 1192 12 0 12 2 1 1 1 0 8 1 pppxif 1576 2 0 2 2 2 0 1 0 8 0 pffrag 232 6 0 2 1 0 1 1 0 482 0 pffrnode 88 6 0 2 1 0 1 1 0 8 0 pffrent 40 33 0 29 2 1 1 1 0 8 0 pfosfp 40 1429 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1429 0 714 21 0 21 21 0 8 0 pfanchor 1288 12 0 3 1 0 1 1 0 8 0 pfstitem 24 42 0 5 1 0 1 1 0 8 0 pfstkey 128 42 0 5 2 0 2 2 0 8 0 pfstate 448 42 0 5 5 0 5 5 0 8 0 pfrule 1360 25 0 19 2 0 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 2208 0 1791 30 1 29 30 0 8 2 art_table 40 2209 0 1791 5 0 5 5 0 8 0 art_node 32 544 0 454 1 0 1 1 0 8 0 sysvmsgpl 40 41 0 1 1 0 1 1 0 8 0 semapl 72 16 0 5 1 0 1 1 0 8 0 shmpl 120 6 0 0 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 2094 0 527 98 0 98 98 0 8 0 ffsino 296 2094 0 527 121 0 121 121 0 8 0 nchpl 144 2529 0 672 69 0 69 69 0 8 0 rtmask 32 4 0 4 1 0 1 1 0 8 1 vnodes 216 2619 0 0 146 0 146 146 0 8 0 namei 1024 14970 0 14970 4 3 1 3 0 8 1 percpumem 16 106 0 56 1 0 1 1 0 8 0 kstatmem 264 123 0 98 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 1 0 1 0 8 0 scxspl 216 9198 0 9198 11 3 8 8 1 8 8 plimitpl 152 160 0 144 1 0 1 1 0 8 0 sigapl 424 1189 0 1128 9 1 8 8 0 8 0 knotepl 120 299 0 0 10 0 10 10 0 8 0 kqueuepl 224 145 0 135 5 2 3 5 0 8 2 pipepl 344 258 0 231 4 0 4 4 0 8 1 fdescpl 528 1153 0 1129 3 0 3 3 0 8 0 filepl 160 4919 0 4719 22 4 18 19 0 8 7 lockfpl 104 233 0 230 2 0 2 2 0 8 1 lockfspl 48 39 0 36 1 0 1 1 0 8 0 sessionpl 144 69 0 60 1 0 1 1 0 8 0 pgrppl 48 119 0 102 1 0 1 1 0 8 0 ucredpl 104 527 0 514 1 0 1 1 0 8 0 zombiepl 144 1129 0 1128 1 0 1 1 0 8 0 processpl 1240 1189 0 1128 7 1 6 6 0 8 0 procpl 664 1643 0 1580 9 2 7 7 0 8 0 sockpl 752 1206 0 1176 24 14 10 20 0 8 6 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 4 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 129 0 0 17 0 17 17 0 8 0 mcl2k 2048 21 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 256 226 0 0 15 0 15 15 0 8 0 bufpl 272 3262 0 107 211 0 211 211 0 8 0 anonpl 32 7370 0 0 60 0 60 60 0 247 0 amapchunkpl 152 22413 0 22107 26 3 23 23 0 158 5 amappl16 200 1706 0 1692 16 6 10 14 0 8 8 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 910 0 909 1 0 1 1 0 8 0 amappl13 176 202 0 190 1 0 1 1 0 8 0 amappl12 168 1561 0 1538 2 0 2 2 0 8 0 amappl11 160 4 0 3 1 0 1 1 0 8 0 amappl10 152 67 0 53 1 0 1 1 0 8 0 amappl9 144 322 0 322 1 1 0 1 0 8 0 amappl8 136 255 0 253 1 0 1 1 0 8 0 amappl7 128 232 0 218 1 0 1 1 0 8 0 amappl6 120 543 0 541 1 0 1 1 0 8 0 amappl5 112 100 0 89 1 0 1 1 0 8 0 amappl4 104 417 0 398 1 0 1 1 0 8 0 amappl3 96 4232 0 4169 3 0 3 3 0 8 0 amappl2 88 1133 0 1060 2 0 2 2 0 8 0 amappl1 80 16400 0 15819 15 1 14 15 0 8 0 amappl 88 6752 0 6643 5 1 4 5 0 92 0 uvmvnodes 80 114 0 0 3 0 3 3 0 8 0 dma16384 16384 1 0 1 1 1 0 1 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 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 8 0 8 2 2 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 8 0 0 1 0 1 1 0 8 0 uaddrrnd 24 1153 0 1129 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1153 0 1129 1 0 1 1 0 8 0 vmmpekpl 168 10777 0 10718 4 0 4 4 0 8 1 vmmpepl 168 82430 0 80873 94 5 89 89 0 357 7 vmsppl 488 1152 0 1128 6 1 5 5 0 8 1 rwobjpl 80 25252 0 24282 27 1 26 26 0 8 2 pdppl 4096 2313 0 2256 135 68 67 85 0 8 10 pvpl 32 13556 0 0 113 3 110 111 0 265 0 pmappl 256 1152 0 1128 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 541 0 77 14 0 14 14 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff834c42ff) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff83507c5e,ffffffff8346f86e,643,ffffffff83451c4f) at __assert+0x29 sys/kern/subr_prf.c:-1 process_stop(ffff800039fa5d40,8000000,1) at process_stop+0x3fe cursig(ffff80003abb9248,ffff80002a338d68,0) at cursig+0x509 x86_atomic_setbits_u32 sys/arch/amd64/compile/SYZKALLER/obj/machine/atomic.h:-1 [inline] cursig(ffff80003abb9248,ffff80002a338d68,0) at cursig+0x509 sys/kern/kern_sig.c:1446 userret(ffff80003abb9248) at userret+0x203 sys/kern/kern_sig.c:2208 syscall(ffff80002a338ea0) at syscall+0x9ce mi_syscall_return sys/sys/syscall_mi.h:203 [inline] syscall(ffff80002a338ea0) at syscall+0x9ce sys/arch/amd64/amd64/trap.c:812 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xbd37a5b2530, count: -8 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp 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 acpicpu_idle() at acpicpu_idle+0x457 sys/dev/acpi/acpicpu_x86.c:1224 sched_idle(ffff80002999dff0) at sched_idle+0x371 sys/kern/kern_sched.c:192 end trace frame: 0x0, count: 10 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 acpicpu_idle() at acpicpu_idle+0x457 sys/dev/acpi/acpicpu_x86.c:1224 sched_idle(ffff80002999dff0) at sched_idle+0x371 sys/kern/kern_sched.c:192 end trace frame: 0x0, count: -5