The sizeof(port->vlarb_high) is 128. sizeof(default_vlarb_high) is 30.
memcpy(port->vlarb_high, default_vlarb_high, sizeof(port->vlarb_high))
will fill [31, 128] bytes of port->vlarb_high with garbage after
default_vlarb_high.
-------------------------------------------------------------------------
make[1]: Entering directory '/home/honli/rpmbuild/BUILD/ibsim-0.7/ibsim'
cc -O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -fexceptions -fstack-protector-strong -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -Wall -g -Werror -Wno-deprecated-declarations -fpic -I. -I../include -I/usr/include -c -o sim_net.o sim_net.c
In file included from /usr/include/string.h:494,
from sim_net.c:38:
In function 'memcpy',
inlined from 'init_ports' at sim_net.c:648:3:
/usr/include/bits/string_fortified.h:34:10: error: '__builtin_memcpy' forming offset [31, 128] is out of the bounds [0, 30] of object 'default_vlarb_high' with type 'const struct vlarb[15]' [-Werror=array-bounds]
return __builtin___memcpy_chk (__dest, __src, __len, __bos0 (__dest));
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
sim_net.c: In function 'init_ports':
sim_net.c:171:27: note: 'default_vlarb_high' declared here
static const struct vlarb default_vlarb_high[] = {
^~~~~~~~~~~~~~~~~~
In file included from /usr/include/string.h:494,
from sim_net.c:38:
In function 'memcpy',
inlined from 'init_ports' at sim_net.c:650:3:
/usr/include/bits/string_fortified.h:34:10: error: '__builtin_memcpy' forming offset [31, 128] is out of the bounds [0, 30] of object 'default_vlarb_low' with type 'const struct vlarb[15]' [-Werror=array-bounds]
return __builtin___memcpy_chk (__dest, __src, __len, __bos0 (__dest));
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
sim_net.c: In function 'init_ports':
sim_net.c:176:27: note: 'default_vlarb_low' declared here
static const struct vlarb default_vlarb_low[] = {
^~~~~~~~~~~~~~~~~
In file included from /usr/include/string.h:494,
from sim_net.c:38:
Signed-off-by: Honggang Li <honli@xxxxxxxxxx>
---
ibsim/sim_net.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/ibsim/sim_net.c b/ibsim/sim_net.c
index a963ff6d6589..a62d39d39174 100644
--- a/ibsim/sim_net.c
+++ b/ibsim/sim_net.c
@@ -646,9 +646,9 @@ static void init_ports(Node * node, int type, int maxports)
memcpy(port->sl2vl + 8 * j, default_sl2vl, 8);
memcpy(port->vlarb_high, default_vlarb_high,
- sizeof(port->vlarb_high));
+ sizeof(default_vlarb_high));
memcpy(port->vlarb_low, default_vlarb_low,
- sizeof(port->vlarb_low));
+ sizeof(default_vlarb_low));
}
}
--
2.15.0-rc1
