On 29/06/22(Wed) 07:02, Anton Lindqvist wrote: > On Tue, Jun 28, 2022 at 06:08:18AM -0600, Claudio Jeker wrote: > > CVSROOT: /cvs > > Module name: src > > Changes by: clau...@cvs.openbsd.org 2022/06/28 06:08:18 > > > > Modified files: > > sys/kern : kern_sig.c > > > > Log message: > > Cleanup the sleep loop in single_thread_check_locked(). The deep checks > > only matter on entry and the pr->ps_single check is done in the while body. > > With and OK mpi@ > > syzkaller just found a reproducer for the following panic. Is it related > to this commit?
I believe it is. If there's a race between SINGLE_SUSPEND and PS_SINGLEEXIT the deep check should be re-done. The problem reported by syzkaller is a lock ordering issue. The SCHED_LOCK() is held when trying to grab the KERNEL_LOCK(). This can only happen if a thread is calling exit1() inside single_thread_check_locked() but that should only be possible at the boundary of the kernel not in the middle of a sleep. So I believe this change was wrong and we should revert it. Thanks! > > syzbot has found a reproducer for the following issue on: > > > > HEAD commit: 37c734d33dee constify miscellaneous arm64 pin and clock ta.. > > git tree: openbsd > > console output: https://syzkaller.appspot.com/x/log.txt?x=13971298080000 > > kernel config: https://syzkaller.appspot.com/x/.config?x=7058272de1526588 > > dashboard link: https://syzkaller.appspot.com/bug?extid=f7634539e73108238c2a > > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17fe7ac0080000 > > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16253588080000 > > > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > > Reported-by: syzbot+f7634539e73108238...@syzkaller.appspotmail.com > > > > panic: kernel diagnostic assertion "__mp_lock_held(&sched_lock, curcpu()) > > == 0" failed: file > > "/syzkaller/managers/setuid/kernel/sys/kern/kern_lock.c", line 63 > > Stopped at db_enter+0x18: addq $0x8,%rsp > > TID PID UID PRFLAGS PFLAGS CPU COMMAND > > *226148 13902 0 0x1802 0x4080080 1 syz-executor2883823057 > > db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 > > panic(ffffffff8259bd82) at panic+0x177 sys/kern/subr_prf.c:202 > > __assert(ffffffff8261504d,ffffffff8261b5a3,3f,ffffffff8264d4fb) at > > __assert+0x25 sys/kern/subr_prf.c:161 > > _kernel_lock() at _kernel_lock+0xb2 sys/kern/kern_lock.c:63 > > single_thread_check_locked(ffff800021232548,1,c) at > > single_thread_check_locked+0x1f6 sys/kern/kern_sig.c:2037 > > single_thread_check(ffff800021232548,1) at single_thread_check+0x4b > > sys/kern/kern_sig.c:2057 > > sleep_finish(ffff8000212c2550,1) at sleep_finish+0x75 sleep_signal_check > > sys/kern/kern_synch.c:464 [inline] > > sleep_finish(ffff8000212c2550,1) at sleep_finish+0x75 > > sys/kern/kern_synch.c:400 > > rwsleep(ffff800021232548,ffffffff82957750,120,ffffffff82595e88,0) at > > rwsleep+0xd5 sys/kern/kern_synch.c:314 > > futex_wait(bc96a93640,1,0,2) at futex_wait+0x13c sys/kern/sys_futex.c:260 > > sys_futex(ffff800021232548,ffff8000212c26e0,ffff8000212c2740) at > > sys_futex+0xf8 sys/kern/sys_futex.c:111 > > syscall(ffff8000212c27b0) at syscall+0x484 mi_syscall > > sys/sys/syscall_mi.h:102 [inline] > > syscall(ffff8000212c27b0) at syscall+0x484 sys/arch/amd64/amd64/trap.c:585 > > Xsyscall() at Xsyscall+0x128 > > end of kernel > > end trace frame: 0xbcc5099500, count: 3 > > 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 "__mp_lock_held(&sched_lock, curcpu()) > > == 0" failed: file > > "/syzkaller/managers/setuid/kernel/sys/kern/kern_lock.c", line 63 > > ddb{1}> trace > > db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 > > panic(ffffffff8259bd82) at panic+0x177 sys/kern/subr_prf.c:202 > > __assert(ffffffff8261504d,ffffffff8261b5a3,3f,ffffffff8264d4fb) at > > __assert+0x25 sys/kern/subr_prf.c:161 > > _kernel_lock() at _kernel_lock+0xb2 sys/kern/kern_lock.c:63 > > single_thread_check_locked(ffff800021232548,1,c) at > > single_thread_check_locked+0x1f6 sys/kern/kern_sig.c:2037 > > single_thread_check(ffff800021232548,1) at single_thread_check+0x4b > > sys/kern/kern_sig.c:2057 > > sleep_finish(ffff8000212c2550,1) at sleep_finish+0x75 sleep_signal_check > > sys/kern/kern_synch.c:464 [inline] > > sleep_finish(ffff8000212c2550,1) at sleep_finish+0x75 > > sys/kern/kern_synch.c:400 > > rwsleep(ffff800021232548,ffffffff82957750,120,ffffffff82595e88,0) at > > rwsleep+0xd5 sys/kern/kern_synch.c:314 > > futex_wait(bc96a93640,1,0,2) at futex_wait+0x13c sys/kern/sys_futex.c:260 > > sys_futex(ffff800021232548,ffff8000212c26e0,ffff8000212c2740) at > > sys_futex+0xf8 sys/kern/sys_futex.c:111 > > syscall(ffff8000212c27b0) at syscall+0x484 mi_syscall > > sys/sys/syscall_mi.h:102 [inline] > > syscall(ffff8000212c27b0) at syscall+0x484 sys/arch/amd64/amd64/trap.c:585 > > Xsyscall() at Xsyscall+0x128 > > end of kernel > > end trace frame: 0xbcc5099500, count: -12 > > ddb{1}> show registers > > rdi 0 > > rsi 0x1 > > rbp 0xffff8000212c2310 > > rbx 0xffff800020dd9bb7 > > rdx 0x3fd > > rcx 0 > > rax 0x9f > > r8 0x101010101010101 > > r9 0x8080808080808080 > > r10 0x3b3e1894665f128c > > r11 0x7302afdd430d6aad > > r12 0xffff800020dd99b8 > > r13 0 > > r14 0 > > r15 0x1 > > rip 0xffffffff81477f68 db_enter+0x18 > > cs 0x8 > > rflags 0x246 > > rsp 0xffff8000212c2300 > > ss 0x10 > > db_enter+0x18: addq $0x8,%rsp > > ddb{1}> show proc > > PROC (syz-executor2883823057) pid=226148 stat=onproc > > flags process=1802<EXEC,COREDUMP,SINGLEEXIT> > > proc=4080080<SINTR,SUSPSINGLE,THREAD> > > pri=52, usrpri=52, nice=20 > > forw=0xffffffffffffffff, list=0xffff800021233a48,0xffffffff82ae5bb0 > > process=0xffff8000ffff10b0 user=0xffff8000212bd000, > > vmspace=0xfffffd807effd450 > > estcpu=2, cpticks=0, pctcpu=0.0 > > user=0, sys=0, intr=0 > > ddb{1}> ps > > PID TID PPID UID S FLAGS WAIT COMMAND > > 13902 344694 23130 0 2 0x3802 > > syz-executor2883823057 > > *13902 226148 23130 0 7 0x4081882 > > syz-executor2883823057 > > 23130 385634 76440 0 3 0x10008a sigsusp ksh > > 76440 29313 65506 0 3 0x9a kqread sshd > > 95913 287839 1 0 3 0x100083 ttyin getty > > 65506 148128 1 0 3 0x88 kqread sshd > > 62671 98026 96552 73 3 0x1100090 kqread syslogd > > 96552 311686 1 0 3 0x100082 netio syslogd > > 50429 379011 1 0 3 0x100080 kqread resolvd > > 89371 503269 64993 77 3 0x100092 kqread dhcpleased > > 97655 176247 64993 77 3 0x100092 kqread dhcpleased > > 64993 120395 1 0 3 0x80 kqread dhcpleased > > 3118 392503 0 0 3 0x14200 bored smr > > 605 361361 0 0 3 0x14200 pgzero zerothread > > 85162 142689 0 0 3 0x14200 aiodoned aiodoned > > 45741 485789 0 0 3 0x14200 syncer update > > 35012 262224 0 0 3 0x14200 cleaner cleaner > > 75116 185128 0 0 3 0x14200 reaper reaper > > 79943 462738 0 0 3 0x14200 pgdaemon pagedaemon > > 62164 479814 0 0 3 0x14200 bored viomb > > 15524 293409 0 0 3 0x40014200 acpi0 acpi0 > > 89569 79084 0 0 3 0x40014200 idle1 > > 23750 277942 0 0 3 0x14200 bored softnet > > 93256 6832 0 0 3 0x14200 bored softnet > > 90721 370093 0 0 3 0x14200 bored softnet > > 86336 16639 0 0 3 0x14200 bored softnet > > 16269 147355 0 0 3 0x14200 bored systqmp > > 93611 6797 0 0 3 0x14200 bored systq > > 4323 195309 0 0 3 0x40014200 bored softclock > > 91359 359082 0 0 7 0x40014200 idle0 > > 1 151075 0 0 3 0x82 wait init > > 0 0 -1 0 3 0x10200 scheduler swapper > > ddb{1}> show all locks > > CPU 1: > > exclusive sched_lock &sched_lock r = 0 (0xffffffff82b5eeb8) > > #0 witness_lock+0x44d > > #1 __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 > > #2 mi_switch+0x3d4 sys/kern/sched_bsd.c:419 > > #3 single_thread_check_locked+0x17f sys/kern/kern_sig.c:2045 > > #4 single_thread_check+0x4b sys/kern/kern_sig.c:2057 > > #5 sleep_finish+0x75 sleep_signal_check sys/kern/kern_synch.c:464 [inline] > > #5 sleep_finish+0x75 sys/kern/kern_synch.c:400 > > #6 rwsleep+0xd5 sys/kern/kern_synch.c:314 > > #7 futex_wait+0x13c sys/kern/sys_futex.c:260 > > #8 sys_futex+0xf8 sys/kern/sys_futex.c:111 > > #9 syscall+0x484 mi_syscall sys/sys/syscall_mi.h:102 [inline] > > #9 syscall+0x484 sys/arch/amd64/amd64/trap.c:585 > > #10 Xsyscall+0x128 > > ddb{1}> show malloc > > Type InUse MemUse HighUse Limit Requests Type Lim > > devbuf 10146 6388K 6420K 78643K 11236 0 > > pcb 13 8K 8K 78643K 13 0 > > rtable 58 1K 2K 78643K 104 0 > > ifaddr 24 7K 7K 78643K 24 0 > > counters 40 33K 33K 78643K 40 0 > > ioctlops 0 0K 2K 78643K 25 0 > > mount 1 1K 1K 78643K 1 0 > > log 0 0K 0K 78643K 5 0 > > vnodes 1166 73K 73K 78643K 1179 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 226 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 2K 78643K 389 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 7 26K 26K 78643K 7 0 > > UVM amap 59 11K 11K 78643K 1401 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 18 4705K 4769K 78643K 2266 0 > > kqueue 11 16K 18K 78643K 24 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 > > plcache 128 22 0 0 1 0 1 1 0 8 > > 0 > > rtpcb 120 17 0 14 1 0 1 1 0 8 > > 0 > > rtentry 112 23 0 1 1 0 1 1 0 8 > > 0 > > unpcb 136 33 0 20 1 0 1 1 0 8 > > 0 > > syncache 296 5 0 5 2 1 1 1 0 8 > > 1 > > tcpcb 736 8 0 5 1 0 1 1 0 8 > > 0 > > arp 120 2 0 0 1 0 1 1 0 8 > > 0 > > inpcb 320 25 0 19 1 0 1 1 0 8 > > 0 > > 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 1416 0 38 87 0 87 87 0 8 > > 0 > > ffsino 272 1416 0 38 92 0 92 92 0 8 > > 0 > > nchpl 144 1603 0 47 58 0 58 58 0 8 > > 0 > > uvmvnodes 80 1425 0 0 30 0 30 30 0 8 > > 0 > > vnodes 224 1425 0 0 84 0 84 84 0 8 > > 0 > > namei 1024 4171 0 4171 2 1 1 1 0 8 > > 1 > > percpumem 16 32 0 0 1 0 1 1 0 8 > > 0 > > kstatmem 264 6 0 0 1 0 1 1 0 8 > > 0 > > scxspl 216 4008 0 4008 10 8 2 8 0 8 > > 2 > > plimitpl 152 17 0 10 1 0 1 1 0 8 > > 0 > > sigapl 424 294 0 264 4 0 4 4 0 8 > > 0 > > futexpl 64 1 0 0 1 0 1 1 0 8 > > 0 > > knotepl 120 50 0 0 2 0 2 2 0 8 > > 0 > > kqueuepl 224 20 0 13 1 0 1 1 0 8 > > 0 > > pipepl 336 79 0 76 2 1 1 1 0 8 > > 0 > > fdescpl 496 277 0 264 3 1 2 3 0 8 > > 0 > > filepl 152 1043 0 990 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 64 0 54 1 0 1 1 0 8 > > 0 > > zombiepl 144 264 0 264 2 1 1 1 0 8 > > 1 > > processpl 1064 294 0 264 3 0 3 3 0 8 > > 0 > > procpl 672 295 0 264 3 0 3 3 0 8 > > 0 > > sockpl 480 75 0 53 3 0 3 3 0 8 > > 0 > > mcl8k 8192 3 0 0 1 0 1 1 0 8 > > 0 > > mcl4k 4096 5 0 0 1 0 1 1 0 8 > > 0 > > mcl2k 2048 76 0 0 9 0 9 9 0 8 > > 0 > > mtagpl 96 3 0 0 1 0 1 1 0 8 > > 0 > > mbufpl 256 119 0 0 7 0 7 7 0 8 > > 0 > > bufpl 288 1945 0 86 133 0 133 133 0 8 > > 0 > > anonpl 24 35567 0 33567 15 2 13 13 0 186 > > 0 > > amapchunkpl 152 2550 0 2449 5 1 4 5 0 158 > > 0 > > amappl16 200 85 0 80 1 0 1 1 0 8 > > 0 > > amappl15 192 1 0 1 1 1 0 1 0 8 > > 0 > > amappl13 176 32 0 31 2 1 1 1 0 8 > > 0 > > amappl12 168 3 0 3 2 1 1 1 0 8 > > 1 > > amappl11 160 60 0 47 1 0 1 1 0 8 > > 0 > > amappl10 152 1 0 1 1 1 0 1 0 8 > > 0 > > amappl9 144 493 0 490 1 0 1 1 0 8 > > 0 > > amappl8 136 333 0 331 2 1 1 1 0 8 > > 0 > > amappl7 128 48 0 45 1 0 1 1 0 8 > > 0 > > amappl6 120 94 0 84 1 0 1 1 0 8 > > 0 > > amappl5 112 81 0 73 1 0 1 1 0 8 > > 0 > > amappl4 104 565 0 546 1 0 1 1 0 8 > > 0 > > amappl3 96 400 0 378 1 0 1 1 0 8 > > 0 > > amappl2 88 416 0 378 1 0 1 1 0 8 > > 0 > > amappl1 80 8759 0 8368 9 0 9 9 0 8 > > 0 > > amappl 88 1147 0 1107 2 1 1 2 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 24 277 0 264 1 0 1 1 0 8 > > 0 > > uaddrbest 32 2 0 0 1 0 1 1 0 8 > > 0 > > uaddr 24 277 0 264 1 0 1 1 0 8 > > 0 > > vmmpekpl 168 6036 0 6023 1 0 1 1 0 8 > > 0 > > vmmpepl 168 24953 0 24124 40 2 38 38 0 357 > > 0 > > vmsppl 368 276 0 264 2 0 2 2 0 8 > > 0 > > rwobjpl 56 9116 0 7145 29 0 29 29 0 8 > > 0 > > pdppl 4096 561 0 528 51 18 33 41 0 8 > > 0 > > pvpl 32 118885 0 115008 34 1 33 33 0 265 > > 0 > > pmappl 248 276 0 264 2 1 1 2 0 8 > > 0 > > extentpl 40 58 0 38 1 0 1 1 0 8 > > 0 > > phpool 112 402 0 22 11 0 11 11 0 8 > > 0 > > ddb{1}> machine ddbcpu 0 > > Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp > > x86_ipi_db(ffffffff8292aff0) at x86_ipi_db+0x1a > > sys/arch/amd64/amd64/db_interface.c:393 > > x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 > > Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 > > __mp_lock(ffffffff82b5ecb0) at __mp_lock+0x122 __mp_lock_spin > > sys/kern/kern_lock.c:116 [inline] > > __mp_lock(ffffffff82b5ecb0) at __mp_lock+0x122 sys/kern/kern_lock.c:147 > > __mp_acquire_count(ffffffff82b5ecb0,1) at __mp_acquire_count+0x48 > > sys/kern/kern_lock.c:227 > > mi_switch() at mi_switch+0x3d4 sys/kern/sched_bsd.c:419 > > sched_idle(ffffffff8292aff0) at sched_idle+0x1a6 sys/kern/kern_sched.c:164 > > end trace frame: 0x0, count: 8 > > ddb{0}> trace > > x86_ipi_db(ffffffff8292aff0) at x86_ipi_db+0x1a > > sys/arch/amd64/amd64/db_interface.c:393 > > x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 > > Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 > > __mp_lock(ffffffff82b5ecb0) at __mp_lock+0x122 __mp_lock_spin > > sys/kern/kern_lock.c:116 [inline] > > __mp_lock(ffffffff82b5ecb0) at __mp_lock+0x122 sys/kern/kern_lock.c:147 > > __mp_acquire_count(ffffffff82b5ecb0,1) at __mp_acquire_count+0x48 > > sys/kern/kern_lock.c:227 > > mi_switch() at mi_switch+0x3d4 sys/kern/sched_bsd.c:419 > > sched_idle(ffffffff8292aff0) at sched_idle+0x1a6 sys/kern/kern_sched.c:164 > > end trace frame: 0x0, count: -7 > > ddb{0}> machine ddbcpu 1 > > Stopped at db_enter+0x18: addq $0x8,%rsp > > db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 > > panic(ffffffff8259bd82) at panic+0x177 sys/kern/subr_prf.c:202 > > __assert(ffffffff8261504d,ffffffff8261b5a3,3f,ffffffff8264d4fb) at > > __assert+0x25 sys/kern/subr_prf.c:161 > > _kernel_lock() at _kernel_lock+0xb2 sys/kern/kern_lock.c:63 > > single_thread_check_locked(ffff800021232548,1,c) at > > single_thread_check_locked+0x1f6 sys/kern/kern_sig.c:2037 > > single_thread_check(ffff800021232548,1) at single_thread_check+0x4b > > sys/kern/kern_sig.c:2057 > > sleep_finish(ffff8000212c2550,1) at sleep_finish+0x75 sleep_signal_check > > sys/kern/kern_synch.c:464 [inline] > > sleep_finish(ffff8000212c2550,1) at sleep_finish+0x75 > > sys/kern/kern_synch.c:400 > > rwsleep(ffff800021232548,ffffffff82957750,120,ffffffff82595e88,0) at > > rwsleep+0xd5 sys/kern/kern_synch.c:314 > > futex_wait(bc96a93640,1,0,2) at futex_wait+0x13c sys/kern/sys_futex.c:260 > > sys_futex(ffff800021232548,ffff8000212c26e0,ffff8000212c2740) at > > sys_futex+0xf8 sys/kern/sys_futex.c:111 > > syscall(ffff8000212c27b0) at syscall+0x484 mi_syscall > > sys/sys/syscall_mi.h:102 [inline] > > syscall(ffff8000212c27b0) at syscall+0x484 sys/arch/amd64/amd64/trap.c:585 > > Xsyscall() at Xsyscall+0x128 > > end of kernel > > end trace frame: 0xbcc5099500, count: 3 > > ddb{1}> trace > > db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 > > panic(ffffffff8259bd82) at panic+0x177 sys/kern/subr_prf.c:202 > > __assert(ffffffff8261504d,ffffffff8261b5a3,3f,ffffffff8264d4fb) at > > __assert+0x25 sys/kern/subr_prf.c:161 > > _kernel_lock() at _kernel_lock+0xb2 sys/kern/kern_lock.c:63 > > single_thread_check_locked(ffff800021232548,1,c) at > > single_thread_check_locked+0x1f6 sys/kern/kern_sig.c:2037 > > single_thread_check(ffff800021232548,1) at single_thread_check+0x4b > > sys/kern/kern_sig.c:2057 > > sleep_finish(ffff8000212c2550,1) at sleep_finish+0x75 sleep_signal_check > > sys/kern/kern_synch.c:464 [inline] > > sleep_finish(ffff8000212c2550,1) at sleep_finish+0x75 > > sys/kern/kern_synch.c:400 > > rwsleep(ffff800021232548,ffffffff82957750,120,ffffffff82595e88,0) at > > rwsleep+0xd5 sys/kern/kern_synch.c:314 > > futex_wait(bc96a93640,1,0,2) at futex_wait+0x13c sys/kern/sys_futex.c:260 > > sys_futex(ffff800021232548,ffff8000212c26e0,ffff8000212c2740) at > > sys_futex+0xf8 sys/kern/sys_futex.c:111 > > syscall(ffff8000212c27b0) at syscall+0x484 mi_syscall > > sys/sys/syscall_mi.h:102 [inline] > > syscall(ffff8000212c27b0) at syscall+0x484 sys/arch/amd64/amd64/trap.c:585 > > Xsyscall() at Xsyscall+0x128 > > end of kernel > > end trace frame: 0xbcc5099500, count: -12 > > ddb{1}> > > > > -- > > You received this message because you are subscribed to the Google Groups > > "syzkaller-openbsd-bugs" group. > > To unsubscribe from this group and stop receiving emails from it, send an > > email to syzkaller-openbsd-bugs+unsubscr...@googlegroups.com. > > To view this discussion on the web visit > > https://groups.google.com/d/msgid/syzkaller-openbsd-bugs/0000000000005a0a5205e28d50c3%40google.com. >
