Add mandatory OpenBSD bits (#689)

all: add openbsd support

squash of the following commits:

* openbsd: add mandatory bits
* report: add OpenBSD support
* executor: skip building kvm on OpenBSD
* executor: add OpenBSD support
Linking against libutil is necessary due to usage of openpty(3).
* executor: fix typo in fail() message
* fixup! report: add OpenBSD support
* fixup! openbsd: add mandatory bits
* fixup! openbsd: add mandatory bits
* fixup! openbsd: add mandatory bits
* fixup! report: add OpenBSD support
* gometalinter: skip sys/openbsd

6 files changed, 81 insertions, 0 deletions

diff --git a/pkg/report/testdata/openbsd/report/0 b/pkg/report/testdata/openbsd/report/0
new file mode 100644
index 000000000..bb002c04d
--- /dev/null
+++ b/pkg/report/testdata/openbsd/report/0
@@ -0,0 +1,5 @@
+TITLE: uvm_fault: vn_writechk
+
+login: uvm_fault(0xffffff0018def850, 0x50, 0, 1) -> e
+
kernel: page fault trap, code=0
+
Stopped at      vn_writechk+0x13:       testb   $0x1,0x50(%rax)
diff --git a/pkg/report/testdata/openbsd/report/1 b/pkg/report/testdata/openbsd/report/1
new file mode 100644
index 000000000..51b7dd62f
--- /dev/null
+++ b/pkg/report/testdata/openbsd/report/1
@@ -0,0 +1,26 @@
+TITLE: panic: cleaned vnode isn't
+
+login: cleaned vnode: 0xffffff001742a5c0, type VBAD, use 0, write 0, hold 0,
+
	tag VT_UFS, ino 26028, on dev 4, 0 flags 0x100, effnlink 1, nlink 1
+
	mode 0177755, owner 0, group 0, size 0
+
panic: cleaned vnode isn't
+
Stopped at      db_enter+0xa:   popq    %rbp
+
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
+
*329861   4439      0         0x2          0    0K syz-executor1
+
db_enter() at db_enter+0xa
+
panic() at panic+0x147
+
getnewvnode() at getnewvnode+0x3bc
+
ffs_vget(ffff80000e400558,ffff80000e400580,ffffff000e5a7e20) at ffs_vget+0xc1
+
ufs_lookup() at ufs_lookup+0xee3
+
VOP_LOOKUP(ffffff001bf4d758,ffff80000e400530,ffffff001bf4d758) at VOP_LOOKUP+0x
+
56
+
vfs_lookup(ffff80000e400568) at vfs_lookup+0x3c1
+
namei(ffff80000e400530) at namei+0x2f4
+
dofstatat(280,ffff80000e3b12a0,0,ffff80000e400750,7f7ffffe3bd8) at dofstatat+0x
+
93
+
syscall(0) at syscall+0x489
+
Xsyscall_untramp(6,0,0,0,0,28) at Xsyscall_untramp+0xe4
+
end of kernel
+
end trace frame: 0x7f7ffffe40b0, count: 4
+
https://www.openbsd.org/ddb.html describes the minimum info required in bug
+
reports.  Insufficient info makes it difficult to find and fix bugs.
diff --git a/pkg/report/testdata/openbsd/report/2 b/pkg/report/testdata/openbsd/report/2
new file mode 100644
index 000000000..e2e017429
--- /dev/null
+++ b/pkg/report/testdata/openbsd/report/2
@@ -0,0 +1,24 @@
+TITLE: pool: double put: mbufpl
+
+panic: pool_do_put: mbufpl: double pool_put: 0xffffff001d506200
+Stopped at      db_enter+0xa:   popq    %rbp
+    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
+*350399  57238      0           0  0x4000000    0  syz-executor1
+db_enter() at db_enter+0xa
+panic() at panic+0x147
+pool_do_put(ffffff001d506200,ffffffff81eacbe8) at pool_do_put+0x2e2
+pool_put(fecbcf835145a619,ffffff001d506200) at pool_put+0x37
+m_free(ffffff001d506200) at m_free+0x11e
+m_freem(2d) at m_freem+0x2d
+soreceive(38a,ffffff001a63c930,0,0,ffff80000e423648,ffffff001071db90) at sorece
+ive+0x1fc
+recvit(ffff80000e2b7050,ffff80000e4236e0,0,ffff80000e4236f8,12eb78e821c8) at re
+cvit+0x253
+sys_recvfrom(ffff80000e423780,ffff80000e2b7050,ffff80000e315170) at sys_recvfro
+m+0xbc
+syscall(0) at syscall+0x3e4
+Xsyscall_untramp(6,0,0,0,0,0) at Xsyscall_untramp+0xe4
+end of kernel
+end trace frame: 0x12eb78e82220, count: 4
+https://www.openbsd.org/ddb.html describes the minimum info required in bug
+reports.  Insufficient info makes it difficult to find and fix bugs.
diff --git a/pkg/report/testdata/openbsd/report/3 b/pkg/report/testdata/openbsd/report/3
new file mode 100644
index 000000000..ed1b9ffc3
--- /dev/null
+++ b/pkg/report/testdata/openbsd/report/3
@@ -0,0 +1,5 @@
+TITLE: kernel: page fault trap, code=0
+
+login:
+
kernel: page fault trap, code=0
+
Stopped at      vn_writechk+0x13:       testb   $0x1,0x50(%rax)
diff --git a/pkg/report/testdata/openbsd/report/4 b/pkg/report/testdata/openbsd/report/4
new file mode 100644
index 000000000..9cb43cb91
--- /dev/null
+++ b/pkg/report/testdata/openbsd/report/4
@@ -0,0 +1,19 @@
+TITLE: pool: free list modified: knotepl
+
+panic: pool_do_get: knotepl free list modified: page 0xffffff0016069000; item addr 0xffffff00160699b8; offset 0x10=0x15c9ef10
+Stopped at      db_enter+0xa:   popq    %rbp
+    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
+*261118  11352      0           0  0x4000000    0  syz-executor1
+db_enter() at db_enter+0xa
+panic() at panic+0x147
+pool_do_get(1,ffffffff81e8e708,0) at pool_do_get+0x3e9
+pool_get(ffff80000e31f730,d) at pool_get+0x77
+kqueue_register(4,16,ffff80000e44f1f8) at kqueue_register+0x2ab
+sys_kevent(ffff80000e44f280,ffff80000e31f730,ffff80000e2ace90) at sys_kevent+0x
+207
+syscall(0) at syscall+0x3e4
+Xsyscall_untramp(6,0,0,0,0,0) at Xsyscall_untramp+0xe4
+end of kernel
+end trace frame: 0x171c1a028b50, 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.
diff --git a/pkg/report/testdata/openbsd/report/5 b/pkg/report/testdata/openbsd/report/5
new file mode 100644
index 000000000..fd5008393
--- /dev/null
+++ b/pkg/report/testdata/openbsd/report/5
@@ -0,0 +1,2 @@
+
+reorder_kernel: kernel relinking failed; see /usr/share/relink/kernel/KCOV/relink.log