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assert "refs != ~NUM" failed in kern_synch.c

Status: upstream: reported on 2025/02/08 12:26
Reported-by: syzbot+bee527c059e64ef8bdec@syzkaller.appspotmail.com
First crash: 429d, last: 11h43m

Sample crash report:
panic: kernel diagnostic assertion "refs != ~0" failed: file "/syzkaller/managers/main/kernel/sys/kern/kern_synch.c", line 955
Starting stack trace...
panic(ffffffff8341b8bd) at panic+0x1ba sys/kern/subr_prf.c:229
__assert(ffffffff8345594a,ffffffff834b60a1,3bb,ffffffff8348f8c4) at __assert+0x29 sys/kern/subr_prf.c:-1
refcnt_finalize(ffff80002a7c6c50,ffffffff834113e6) at refcnt_finalize+0x1c8 sys/kern/kern_synch.c:956
pppx_if_destroy(205b9a,ffff80002a7c6c48) at pppx_if_destroy+0x3d sys/net/if_pppx.c:794
pppxclose(205b9a,1,2000,ffff80002a747760) at pppxclose+0xa0 sys/net/if_pppx.c:541
spec_close(ffff80002a7997d0) at spec_close+0x417 sys/kern/spec_vnops.c:-1
VOP_CLOSE(fffffd80691f8970,1,fffffd8007ffd680,ffff80002a747760) at VOP_CLOSE+0x129 sys/kern/vfs_vops.c:156
vn_closefile(fffffd807b6563c0,ffff80002a747760) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:298 [inline]
vn_closefile(fffffd807b6563c0,ffff80002a747760) at vn_closefile+0x11d sys/kern/vfs_vnops.c:621
fdrop(fffffd807b6563c0,ffff80002a747760) at fdrop+0x121 sys/kern/kern_descrip.c:1281
closef(fffffd807b6563c0,ffff80002a747760) at closef+0x190 sys/kern/kern_descrip.c:1265
fdfree(ffff80002a747760) at fdfree+0x115 sys/kern/kern_descrip.c:1196
exit1(ffff80002a747760,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215
sys_exit(ffff80002a747760,ffff80002a799b30,ffff80002a799a80) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80002a799b30) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80002a799b30) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x739ac9634010, count: 242
End of stack trace.
syncing disks...

Crashes (1150):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/04/13 14:34 openbsd ef90b149a753 9530ccf9 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main assert "refs != ~NUM" failed in kern_synch.c
2026/04/09 21:12 openbsd f951d642cc52 4b3d9a38 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "refs != ~NUM" failed in kern_synch.c
2026/04/09 09:22 openbsd b0cdb9e75fee 4b3d9a38 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "refs != ~NUM" failed in kern_synch.c
2026/04/08 08:18 openbsd 7ed665c6a362 4b3d9a38 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main assert "refs != ~NUM" failed in kern_synch.c
2026/04/07 23:39 openbsd 7ed665c6a362 4b3d9a38 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main assert "refs != ~NUM" failed in kern_synch.c
2026/04/06 04:02 openbsd bc22b0de1984 4b3d9a38 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "refs != ~NUM" failed in kern_synch.c
2026/04/05 15:24 openbsd c9c58e023502 4b3d9a38 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main assert "refs != ~NUM" failed in kern_synch.c
2026/04/04 19:24 openbsd c9c58e023502 4b3d9a38 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main assert "refs != ~NUM" failed in kern_synch.c
2026/04/03 20:05 openbsd a0d451d3ebb4 4b3d9a38 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main assert "refs != ~NUM" failed in kern_synch.c
2026/04/03 07:25 openbsd de6be2070bf6 4b3d9a38 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "refs != ~NUM" failed in kern_synch.c
2026/03/29 05:08 openbsd b39c1312a589 4b3d9a38 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "refs != ~NUM" failed in kern_synch.c
2026/03/28 15:55 openbsd 9d790fdba930 4b3d9a38 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main assert "refs != ~NUM" failed in kern_synch.c
2026/03/27 20:13 openbsd f3ad7971a235 4b3d9a38 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "refs != ~NUM" failed in kern_synch.c
2026/03/27 06:07 openbsd 2f434a4256f3 4b3d9a38 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main assert "refs != ~NUM" failed in kern_synch.c
2026/03/26 20:00 openbsd 9c6370df4fcd 4b3d9a38 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "refs != ~NUM" failed in kern_synch.c
2026/03/26 09:50 openbsd 84b7e477fd25 c6143aac .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "refs != ~NUM" failed in kern_synch.c
2026/03/26 05:49 openbsd 84b7e477fd25 c6143aac .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "refs != ~NUM" failed in kern_synch.c
2026/03/26 02:58 openbsd 84b7e477fd25 c6143aac .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "refs != ~NUM" failed in kern_synch.c
2026/03/25 21:38 openbsd ee1bf64f5bae 4367a094 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "refs != ~NUM" failed in kern_synch.c
2026/03/25 08:34 openbsd 87dc1fa97379 35e4ff71 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main assert "refs != ~NUM" failed in kern_synch.c
2026/03/24 07:32 openbsd 2084961b940b baf8bf12 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "refs != ~NUM" failed in kern_synch.c
2026/03/24 04:37 openbsd 2084961b940b baf8bf12 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "refs != ~NUM" failed in kern_synch.c
2026/03/24 01:57 openbsd 2084961b940b baf8bf12 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "refs != ~NUM" failed in kern_synch.c
2026/03/23 12:56 openbsd ccfcb3e6ef18 5e3db351 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main assert "refs != ~NUM" failed in kern_synch.c
2026/03/23 08:00 openbsd ccfcb3e6ef18 5b92003d .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "refs != ~NUM" failed in kern_synch.c
2026/03/23 05:17 openbsd 33c7e43e4e2f 5b92003d .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "refs != ~NUM" failed in kern_synch.c
2026/03/23 03:23 openbsd 33c7e43e4e2f 5b92003d .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "refs != ~NUM" failed in kern_synch.c
2026/03/23 00:49 openbsd 33c7e43e4e2f 5b92003d .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "refs != ~NUM" failed in kern_synch.c
2026/03/22 20:33 openbsd 33c7e43e4e2f 5b92003d .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main assert "refs != ~NUM" failed in kern_synch.c
2026/03/22 16:47 openbsd 67e6794a9e1c 5b92003d .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "refs != ~NUM" failed in kern_synch.c
2026/03/22 12:09 openbsd 67e6794a9e1c 5b92003d .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "refs != ~NUM" failed in kern_synch.c
2026/03/22 10:43 openbsd 67e6794a9e1c 5b92003d .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "refs != ~NUM" failed in kern_synch.c
2026/03/22 03:52 openbsd 8aa14d77a9ab 5b92003d .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "refs != ~NUM" failed in kern_synch.c
2026/03/21 22:00 openbsd 8aa14d77a9ab 5b92003d .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "refs != ~NUM" failed in kern_synch.c
2026/03/21 16:16 openbsd 8aa14d77a9ab 5b92003d .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "refs != ~NUM" failed in kern_synch.c
2026/03/21 08:13 openbsd a71bcab410b6 5b92003d .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "refs != ~NUM" failed in kern_synch.c
2026/03/20 21:03 openbsd 65032adb4937 85bf2a64 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "refs != ~NUM" failed in kern_synch.c
2026/03/20 09:13 openbsd f53d362946f9 2f245add .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main assert "refs != ~NUM" failed in kern_synch.c
2026/03/19 15:06 openbsd e3f28ea82b45 0291cd06 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "refs != ~NUM" failed in kern_synch.c
2026/03/18 22:53 openbsd 561bf2d2294a 0199f9a1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "refs != ~NUM" failed in kern_synch.c
2026/03/18 18:47 openbsd 561bf2d2294a 0199f9a1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "refs != ~NUM" failed in kern_synch.c
2026/03/18 11:14 openbsd 561bf2d2294a 0199f9a1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "refs != ~NUM" failed in kern_synch.c
2026/03/18 02:04 openbsd 7b59c65f5490 c8810548 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main assert "refs != ~NUM" failed in kern_synch.c
2026/03/18 01:59 openbsd 7b59c65f5490 c8810548 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main assert "refs != ~NUM" failed in kern_synch.c
2026/03/17 16:11 openbsd 7b59c65f5490 0737c18f .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main assert "refs != ~NUM" failed in kern_synch.c
2026/03/17 08:42 openbsd 5eccae830399 0737c18f .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "refs != ~NUM" failed in kern_synch.c
2026/03/16 15:46 openbsd 15ef65f2835f 64e21424 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main assert "refs != ~NUM" failed in kern_synch.c
2026/03/16 13:25 openbsd 15ef65f2835f 64e21424 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "refs != ~NUM" failed in kern_synch.c
2026/03/16 01:33 openbsd fd49698d88e5 351cb5cf .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main assert "refs != ~NUM" failed in kern_synch.c
2026/03/15 03:27 openbsd fd49698d88e5 351cb5cf .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main assert "refs != ~NUM" failed in kern_synch.c
2026/03/14 09:28 openbsd fd49698d88e5 351cb5cf .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main assert "refs != ~NUM" failed in kern_synch.c
2026/03/13 01:22 openbsd 7210d95da7cb 2f7f359d .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "refs != ~NUM" failed in kern_synch.c
2025/02/08 12:25 openbsd 2347e6edcd5e ef44b750 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main assert "refs != ~NUM" failed in kern_synch.c
* Struck through repros no longer work on HEAD.