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 1602 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 476825 42117 0 0 0x4000000 0 syz-executor *512500 35806 0 0x40009000 0x8080000 1 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff834b854b) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff834f8d99,ffffffff834604aa,642,ffffffff834424d5) at __assert+0x29 sys/kern/subr_prf.c:-1 process_stop(ffff80002a37d358,8000000,1) at process_stop+0x3fe cursig(ffff80003c3f0a88,ffff80003a7b1c88,0) at cursig+0x509 x86_atomic_setbits_u32 sys/arch/amd64/compile/SYZKALLER/obj/machine/atomic.h:-1 [inline] cursig(ffff80003c3f0a88,ffff80003a7b1c88,0) at cursig+0x509 sys/kern/kern_sig.c:1445 userret(ffff80003c3f0a88) at userret+0x203 sys/kern/kern_sig.c:2207 usertrap(ffff80003a7b1d50) at usertrap+0x508 sys/arch/amd64/amd64/trap.c:654 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7e5ee9d6b900, 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: kernel diagnostic assertion "ISSET(p->p_flag, P_SUSPSIG | P_SUSPSINGLE) == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_sig.c", line 1602 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff834b854b) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff834f8d99,ffffffff834604aa,642,ffffffff834424d5) at __assert+0x29 sys/kern/subr_prf.c:-1 process_stop(ffff80002a37d358,8000000,1) at process_stop+0x3fe cursig(ffff80003c3f0a88,ffff80003a7b1c88,0) at cursig+0x509 x86_atomic_setbits_u32 sys/arch/amd64/compile/SYZKALLER/obj/machine/atomic.h:-1 [inline] cursig(ffff80003c3f0a88,ffff80003a7b1c88,0) at cursig+0x509 sys/kern/kern_sig.c:1445 userret(ffff80003c3f0a88) at userret+0x203 sys/kern/kern_sig.c:2207 usertrap(ffff80003a7b1d50) at usertrap+0x508 sys/arch/amd64/amd64/trap.c:654 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7e5ee9d6b900, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80003a7b1aa0 rbx 0xffff80002999ee07 rdx 0 rcx 0xffff80003c3f0a88 rax 0xffff80002999dff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x48954508361b0737 r11 0x7afa956be08b5f9e r12 0xffff80002999ec08 r13 0 r14 0 r15 0x1 rip 0xffffffff8224d3a5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003a7b1a90 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=512500 pid=35806 tcnt=3 stat=onproc flags process=40009000 proc=8080000 runpri=78, usrpri=78, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80003a7b8a80 scnt=2 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c3f1250,0xffff80003c3f14f8 process=0xffff80002a37d358 user=0xffff80003a7ac000, vmspace=0xfffff7800e0e1d78 estcpu=28, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 63400 430391 20977 0 2 0 syz-executor 63400 518733 20977 0 3 0x4000080 fsleep syz-executor 29251 221345 4683 0 2 0 syz-executor 29251 196970 4683 0 3 0x4000080 fsleep syz-executor 29251 473766 4683 0 3 0x4000080 fsleep syz-executor 17710 152554 58673 0 2 0 syz-executor 17710 33985 58673 0 3 0x4000080 fsleep syz-executor 42117 428806 85699 0 2 0 syz-executor 42117 476825 85699 0 7 0x4000000 syz-executor 70838 302809 33215 0 2 0x1000000 syz-executor 70838 218018 33215 0 3 0x5000080 kqpoll syz-executor 70838 481688 33215 0 3 0x5000080 kqpoll syz-executor 35222 510831 14983 0 3 0x80 nanoslp syz-executor 35222 464707 14983 0 3 0x4000080 sbwait syz-executor 87961 397844 94794 60929 3 0x90 nanoslp syz-executor 87961 209502 94794 60929 3 0x4000090 fsleep syz-executor 87961 312414 94794 60929 3 0x4000090 ttyin syz-executor 87961 92356 94794 60929 3 0x4000090 fsleep syz-executor *35806 512500 92939 0 7 0x48089000 syz-executor 35806 14505 92939 0 2 0x4c089000 syz-executor 35806 318369 92939 0 3 0x4400b000 suspend syz-executor 14983 382206 60947 0 3 0x82 nanoslp syz-executor 33215 3909 60947 0 3 0x82 nanoslp syz-executor 92939 431073 60947 0 3 0x82 wait syz-executor 20977 75677 60947 0 3 0x82 nanoslp syz-executor 85699 310668 60947 0 3 0x82 nanoslp syz-executor 4683 494075 60947 0 3 0x82 nanoslp syz-executor 94794 178370 60947 0 3 0x82 nanoslp syz-executor 58673 286295 60947 0 3 0x82 nanoslp syz-executor 60947 499030 42747 0 3 0x82 kqread syz-executor 42747 151679 84331 0 3 0x10008a sigsusp ksh 84331 247420 32379 0 3 0x98 kqread sshd-session 32379 458517 62043 0 3 0x92 kqread sshd-session 78662 306088 1 0 3 0x100083 ttyin getty 62043 281715 1 0 3 0x88 kqread sshd 71841 243566 65739 74 3 0x1100092 bpf pflogd 65739 338123 1 0 3 0x80 sbwait pflogd 15417 8002 79792 73 3 0x1100090 kqread syslogd 79792 47634 1 0 3 0x100082 sbwait syslogd 83737 90594 1 0 3 0x100080 kqread resolvd 95722 335839 43267 77 3 0x100092 kqread dhcpleased 2070 190042 43267 77 3 0x100092 kqread dhcpleased 43267 300033 1 0 3 0x80 kqread dhcpleased 69019 285724 0 0 3 0x14200 bored smr 15239 459379 0 0 2 0x14200 zerothread 14407 458297 0 0 3 0x14200 aiodoned aiodoned 96422 211272 0 0 3 0x14200 syncer update 475 173768 0 0 3 0x14200 cleaner cleaner 74018 459511 0 0 3 0x14200 reaper reaper 60027 424832 0 0 3 0x14200 pgdaemon pagedaemon 97800 417409 0 0 3 0x14200 bored viomb 70823 462434 0 0 3 0x40014200 acpi0 acpi0 37930 155824 0 0 3 0x40014200 idle1 6910 454505 0 0 3 0x14200 bored softnet1 73568 165511 0 0 3 0x14200 bored softnet0 69402 338980 0 0 3 0x14200 bored systqmp 2714 495327 0 0 3 0x14200 bored systq 90933 356726 0 0 3 0x14200 tmoslp softclockmp 95402 288385 0 0 3 0x40014200 tmoslp softclock 95162 436634 0 0 3 0x40014200 idle0 1 162797 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &sched_lock r = 0 (0xffffffff839e1350) #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:1444 #3 userret+0x203 sys/kern/kern_sig.c:2207 #4 usertrap+0x508 sys/arch/amd64/amd64/trap.c:654 #5 recall_trap+0x8 exclusive mutex &pr->ps_mtx r = 0 (0xffff80002a37d470) #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:1440 #3 userret+0x203 sys/kern/kern_sig.c:2207 #4 usertrap+0x508 sys/arch/amd64/amd64/trap.c:654 #5 recall_trap+0x8 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11136 12124K 12863K 166960K 12783 0 pcb 17 12K 12K 166960K 47 0 rtable 207 7K 8K 166960K 423 0 pf 38 18K 20K 166960K 69 0 ifaddr 38 6K 8K 166960K 57 0 ifgroup 60 2K 2K 166960K 80 0 sysctl 2 1K 9K 166960K 8 0 counters 72 37K 37K 166960K 84 0 ioctlops 0 0K 4K 166960K 1519 0 iov 0 0K 16K 166960K 12 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1353 85K 85K 166960K 1640 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 6 0 VM map 2 1K 1K 166960K 2 0 sem 9 0K 0K 166960K 17 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 93K 166960K 308 0 sigio 0 0K 0K 166960K 3 0 proc 72 115K 164K 166960K 605 0 subproc 72 4K 4K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 22 0 in_multi 77 5K 7K 166960K 112 0 ether_multi 1 0K 0K 166960K 1 0 mrt 1 0K 0K 166960K 8 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 67 307K 307K 166960K 67 0 exec 0 0K 1K 166960K 697 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 246 151K 167K 166960K 4684 0 UVM aobj 5 2K 2K 166960K 6 0 pinsyscall 43 86K 104K 166960K 1530 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 14 0 NDP 13 0K 2K 166960K 36 0 temp 77 9124K 9128K 166960K 22214 0 kqueue 13 20K 26K 166960K 60 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 49 0 46 1 0 1 1 0 8 0 rtentry 176 123 0 35 6 0 6 6 0 8 0 unpcb 144 261 0 239 3 2 1 3 0 8 0 syncache 336 7 0 7 1 1 0 1 0 8 0 tcpcb 736 85 0 80 4 3 1 4 0 8 0 arp 136 20 0 6 1 0 1 1 0 8 0 inpcb 328 241 0 229 4 2 2 4 0 8 1 nd6 152 27 0 9 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 1 0 1 0 8 0 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1192 2 0 2 1 1 0 1 0 8 0 pppxif 1576 1 0 1 1 1 0 1 0 8 0 pfstscr 40 2 0 0 1 0 1 1 0 8 0 pffrag 232 2 0 0 1 0 1 1 0 482 0 pffrnode 88 2 0 0 1 0 1 1 0 8 0 pffrent 40 4 0 2 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 35 0 0 1 0 1 1 0 8 0 pfstkey 128 35 0 0 2 0 2 2 0 8 0 pfstate 448 34 0 0 4 0 4 4 0 8 0 pfrule 1360 24 0 18 2 0 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 502 0 138 29 2 27 29 0 8 0 art_table 40 503 0 138 5 0 5 5 0 8 0 art_node 32 123 0 43 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 2 1 0 1 1 0 8 0 semapl 72 14 0 7 1 0 1 1 0 8 0 shmpl 112 3 0 1 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 1875 0 408 93 0 93 93 0 8 0 ffsino 296 1875 0 408 114 0 114 114 0 8 0 nchpl 144 2297 0 589 64 0 64 64 0 8 0 vnodes 216 2189 0 0 122 0 122 122 0 8 0 namei 1024 8057 0 8057 2 1 1 2 0 8 1 percpumem 16 57 0 6 1 0 1 1 0 8 0 kstatmem 264 41 0 10 3 0 3 3 0 8 0 scsiplug 72 3 0 3 2 1 1 1 0 8 1 scxspl 216 8353 0 8353 10 9 1 8 1 8 1 plimitpl 152 58 0 39 1 0 1 1 0 8 0 sigapl 424 635 0 587 7 1 6 7 0 8 0 knotepl 120 528 0 0 16 0 16 16 0 8 0 kqueuepl 224 141 0 130 5 4 1 5 0 8 0 pipepl 344 145 0 116 3 0 3 3 0 8 0 fdescpl 528 618 0 586 3 0 3 3 0 8 0 filepl 160 2952 0 2724 15 2 13 15 0 8 2 lockfpl 104 92 0 90 1 0 1 1 0 8 0 lockfspl 48 41 0 39 1 0 1 1 0 8 0 sessionpl 144 32 0 23 1 0 1 1 0 8 0 pgrppl 48 48 0 30 1 0 1 1 0 8 0 ucredpl 104 356 0 342 1 0 1 1 0 8 0 zombiepl 144 589 0 589 1 0 1 1 0 8 1 processpl 1232 635 0 587 5 1 4 5 0 8 0 procpl 664 944 0 883 6 0 6 6 0 8 0 sosppl 176 2 0 2 1 1 0 1 0 8 0 sockpl 752 560 0 523 9 5 4 9 0 8 0 mcl64k 65536 3 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 113 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 20 0 0 3 0 3 3 0 8 0 mtagpl 96 21 0 0 1 0 1 1 0 8 0 mbufpl 256 204 0 0 13 0 13 13 0 8 0 bufpl 280 2939 0 106 203 0 203 203 0 8 0 anonpl 32 7551 0 0 61 0 61 61 0 246 0 amapchunkpl 152 13828 0 13298 27 5 22 27 0 158 0 amappl16 200 1074 0 1046 16 13 3 15 0 8 0 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 466 0 465 1 0 1 1 0 8 0 amappl13 176 157 0 145 1 0 1 1 0 8 0 amappl12 168 877 0 846 2 0 2 2 0 8 0 amappl10 152 84 0 69 1 0 1 1 0 8 0 amappl9 144 273 0 273 1 1 0 1 0 8 0 amappl8 136 104 0 102 1 0 1 1 0 8 0 amappl7 128 176 0 163 1 0 1 1 0 8 0 amappl6 120 162 0 160 1 0 1 1 0 8 0 amappl5 112 104 0 92 1 0 1 1 0 8 0 amappl4 104 306 0 285 1 0 1 1 0 8 0 amappl3 96 2631 0 2507 5 1 4 4 0 8 0 amappl2 88 582 0 520 2 0 2 2 0 8 0 amappl1 80 11768 0 11158 16 2 14 16 0 8 0 amappl 88 3879 0 3703 4 0 4 4 0 92 0 uvmvnodes 80 104 0 0 3 0 3 3 0 8 0 dma65536 65536 1 0 1 1 1 0 1 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 128 254 0 254 2 2 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 5 0 1 1 0 1 1 0 8 0 uaddrrnd 24 618 0 586 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 618 0 586 1 0 1 1 0 8 0 vmmpekpl 168 7234 0 7188 3 0 3 3 0 8 0 vmmpepl 168 48200 0 46225 97 8 89 97 0 357 0 vmsppl 488 617 0 586 5 1 4 5 0 8 0 rwobjpl 80 16256 0 15197 27 3 24 27 0 8 0 pdppl 4096 1243 0 1172 107 36 71 85 0 8 0 pvpl 32 13596 0 0 110 0 110 110 0 265 0 pmappl 256 617 0 586 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 287 0 46 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff838f1ff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x54 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x54 sys/dev/kcov.c:153 __mp_lock(ffffffff83b14d40) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83b14d40) at __mp_lock+0x1a3 sys/kern/kern_lock.c:173 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff83b14d40) at __mp_lock+0x19e __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83b14d40) at __mp_lock+0x19e sys/kern/kern_lock.c:173 syscall(ffff80003c3f7f20) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] syscall(ffff80003c3f7f20) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf8c405d9eb0, count: 4 ddb{0}> trace x86_ipi_db(ffffffff838f1ff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x54 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x54 sys/dev/kcov.c:153 __mp_lock(ffffffff83b14d40) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83b14d40) at __mp_lock+0x1a3 sys/kern/kern_lock.c:173 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff83b14d40) at __mp_lock+0x19e __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83b14d40) at __mp_lock+0x19e sys/kern/kern_lock.c:173 syscall(ffff80003c3f7f20) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] syscall(ffff80003c3f7f20) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf8c405d9eb0, count: -11 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x25: addq $0x8,%rsp db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff834b854b) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff834f8d99,ffffffff834604aa,642,ffffffff834424d5) at __assert+0x29 sys/kern/subr_prf.c:-1 process_stop(ffff80002a37d358,8000000,1) at process_stop+0x3fe cursig(ffff80003c3f0a88,ffff80003a7b1c88,0) at cursig+0x509 x86_atomic_setbits_u32 sys/arch/amd64/compile/SYZKALLER/obj/machine/atomic.h:-1 [inline] cursig(ffff80003c3f0a88,ffff80003a7b1c88,0) at cursig+0x509 sys/kern/kern_sig.c:1445 userret(ffff80003c3f0a88) at userret+0x203 sys/kern/kern_sig.c:2207 usertrap(ffff80003a7b1d50) at usertrap+0x508 sys/arch/amd64/amd64/trap.c:654 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7e5ee9d6b900, count: 7 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff834b854b) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff834f8d99,ffffffff834604aa,642,ffffffff834424d5) at __assert+0x29 sys/kern/subr_prf.c:-1 process_stop(ffff80002a37d358,8000000,1) at process_stop+0x3fe cursig(ffff80003c3f0a88,ffff80003a7b1c88,0) at cursig+0x509 x86_atomic_setbits_u32 sys/arch/amd64/compile/SYZKALLER/obj/machine/atomic.h:-1 [inline] cursig(ffff80003c3f0a88,ffff80003a7b1c88,0) at cursig+0x509 sys/kern/kern_sig.c:1445 userret(ffff80003c3f0a88) at userret+0x203 sys/kern/kern_sig.c:2207 usertrap(ffff80003a7b1d50) at usertrap+0x508 sys/arch/amd64/amd64/trap.c:654 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7e5ee9d6b900, count: -8