possible overrun bugs in soring found with LTO

https://bugs.dpdk.org/show_bug.cgi?id=1726

Bug ID: 1726
Summary: possible overrun bugs in soring found with LTO
Product: DPDK
Version: unspecified
Hardware: All
OS: All
Status: UNCONFIRMED
Severity: normal
Priority: Normal
Component: other
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---

Enabling LTO in build allows compiler to detect more bugs such as out of bounds references inside libraries. Several warnings in soring

In function ‘__rte_ring_dequeue_elems_128’,
inlined from ‘__rte_ring_do_dequeue_elems’ at
../lib/ring/rte_ring_elem_pvt.h:279:3,
inlined from ‘soring_dequeue’ at ../lib/ring/soring.c:315:3, inlined from ‘rte_soring_dequeue_bulk’ at ../lib/ring/soring.c:552:9, inlined from ‘test_soring_stages’ at ../app/test/test_soring.c:181:14:
../lib/ring/rte_ring_elem_pvt.h:250:25: warning: writing 32 bytes into a region of size 0 [-Wstringop-overflow=]
250 | memcpy((obj + i), (const void *)(ring + idx),
32);
| ^
../app/test/test_soring.c: In function ‘test_soring_stages’:
../app/test/test_soring.c:157:18: note: at offset 128 into destination object ‘dequeued_objs’ of size 128
157 | uint32_t dequeued_objs[32];
| ^
In function ‘__rte_ring_dequeue_elems_128’,
inlined from ‘__rte_ring_do_dequeue_elems’ at
../lib/ring/rte_ring_elem_pvt.h:279:3,
inlined from ‘soring_dequeue’ at ../lib/ring/soring.c:315:3, inlined from ‘rte_soring_dequeue_bulk’ at ../lib/ring/soring.c:552:9, inlined from ‘test_soring_stages’ at ../app/test/test_soring.c:181:14:
../lib/ring/rte_ring_elem_pvt.h:250:25: warning: writing 32 bytes into a region of size 0 [-Wstringop-overflow=]
250 | memcpy((obj + i), (const void *)(ring + idx),
32);
| ^
../app/test/test_soring.c: In function ‘test_soring_stages’:
../app/test/test_soring.c:157:18: note: at offset 160 into destination object ‘dequeued_objs’ of size 128
157 | uint32_t dequeued_objs[32];
| ^
In function ‘__rte_ring_dequeue_elems_128’,
inlined from ‘__rte_ring_do_dequeue_elems’ at
../lib/ring/rte_ring_elem_pvt.h:279:3,
inlined from ‘soring_dequeue’ at ../lib/ring/soring.c:315:3, inlined from ‘rte_soring_dequeue_bulk’ at ../lib/ring/soring.c:552:9, inlined from ‘test_soring_stages’ at ../app/test/test_soring.c:181:14:
../lib/ring/rte_ring_elem_pvt.h:250:25: warning: writing 32 bytes into a region of size 0 [-Wstringop-overflow=]
250 | memcpy((obj + i), (const void *)(ring + idx),
32);
| ^
../app/test/test_soring.c: In function ‘test_soring_stages’:
../app/test/test_soring.c:157:18: note: at offset 192 into destination object ‘dequeued_objs’ of size 128
157 | uint32_t dequeued_objs[32];
| ^
In function ‘__rte_ring_dequeue_elems_128’,
inlined from ‘__rte_ring_do_dequeue_elems’ at
../lib/ring/rte_ring_elem_pvt.h:279:3,
inlined from ‘soring_dequeue’ at ../lib/ring/soring.c:315:3, inlined from ‘rte_soring_dequeue_bulk’ at ../lib/ring/soring.c:552:9, inlined from ‘test_soring_stages’ at ../app/test/test_soring.c:181:14:
../lib/ring/rte_ring_elem_pvt.h:250:25: warning: writing 32 bytes into a region of size 0 [-Wstringop-overflow=]
250 | memcpy((obj + i), (const void *)(ring + idx),
32);
| ^
../app/test/test_soring.c: In function ‘test_soring_stages’:
../app/test/test_soring.c:157:18: note: at offset 224 into destination object ‘dequeued_objs’ of size 128
157 | uint32_t dequeued_objs[32];
| ^
In function ‘__rte_ring_dequeue_elems_128’,
inlined from ‘__rte_ring_do_dequeue_elems’ at
../lib/ring/rte_ring_elem_pvt.h:279:3,
inlined from ‘soring_dequeue’ at ../lib/ring/soring.c:315:3, inlined from ‘rte_soring_dequeue_bulk’ at ../lib/ring/soring.c:552:9, inlined from ‘test_soring_stages’ at ../app/test/test_soring.c:181:14:
../lib/ring/rte_ring_elem_pvt.h:250:25: warning: writing 32 bytes into a region of size 0 [-Wstringop-overflow=]
250 | memcpy((obj + i), (const void *)(ring + idx),
32);
| ^
../app/test/test_soring.c: In function ‘test_soring_stages’:
../app/test/test_soring.c:157:18: note: at offset 256 into destination object ‘dequeued_objs’ of size 128
157 | uint32_t dequeued_objs[32];
| ^
In function ‘__rte_ring_dequeue_elems_128’,
inlined from ‘__rte_ring_do_dequeue_elems’ at
../lib/ring/rte_ring_elem_pvt.h:279:3,
inlined from ‘soring_dequeue’ at ../lib/ring/soring.c:315:3, inlined from ‘rte_soring_dequeue_bulk’ at ../lib/ring/soring.c:552:9, inlined from ‘test_soring_stages’ at ../app/test/test_soring.c:181:14:
../lib/ring/rte_ring_elem_pvt.h:250:25: warning: writing 32 bytes into a region of size 0 [-Wstringop-overflow=]
250 | memcpy((obj + i), (const void *)(ring + idx),
32);
| ^
../app/test/test_soring.c: In function ‘test_soring_stages’:
../app/test/test_soring.c:157:18: note: at offset 288 into destination object ‘dequeued_objs’ of size 128
157 | uint32_t dequeued_objs[32];
| ^
In function ‘__rte_ring_dequeue_elems_128’,
inlined from ‘__rte_ring_do_dequeue_elems’ at
../lib/ring/rte_ring_elem_pvt.h:279:3,
inlined from ‘soring_dequeue’ at ../lib/ring/soring.c:315:3, inlined from ‘rte_soring_dequeue_bulk’ at ../lib/ring/soring.c:552:9, inlined from ‘test_soring_stages’ at ../app/test/test_soring.c:181:14:
../lib/ring/rte_ring_elem_pvt.h:250:25: warning: writing 32 bytes into a region of size 0 [-Wstringop-overflow=]
250 | memcpy((obj + i), (const void *)(ring + idx),
32);
| ^
../app/test/test_soring.c: In function ‘test_soring_stages’:
../app/test/test_soring.c:157:18: note: at offset 320 into destination object ‘dequeued_objs’ of size 128
157 | uint32_t dequeued_objs[32];
| ^
In function ‘__rte_ring_dequeue_elems_128’,
inlined from ‘__rte_ring_do_dequeue_elems’ at
../lib/ring/rte_ring_elem_pvt.h:279:3,
inlined from ‘soring_dequeue’ at ../lib/ring/soring.c:315:3, inlined from ‘rte_soring_dequeue_bulk’ at ../lib/ring/soring.c:552:9, inlined from ‘test_soring_stages’ at ../app/test/test_soring.c:181:14:
../lib/ring/rte_ring_elem_pvt.h:250:25: warning: writing 32 bytes into a region of size 0 [-Wstringop-overflow=]
250 | memcpy((obj + i), (const void *)(ring + idx),
32);
| ^
../app/test/test_soring.c: In function ‘test_soring_stages’:
../app/test/test_soring.c:157:18: note: at offset 352 into destination object ‘dequeued_objs’ of size 128
157 | uint32_t dequeued_objs[32];
| ^
In function ‘__rte_ring_dequeue_elems_128’,
inlined from ‘__rte_ring_do_dequeue_elems’ at
../lib/ring/rte_ring_elem_pvt.h:279:3,
inlined from ‘soring_dequeue’ at ../lib/ring/soring.c:315:3, inlined from ‘rte_soring_dequeue_bulk’ at ../lib/ring/soring.c:552:9, inlined from ‘test_soring_stages’ at ../app/test/test_soring.c:181:14:
../lib/ring/rte_ring_elem_pvt.h:250:25: warning: writing 32 bytes into a region of size 0 [-Wstringop-overflow=]
250 | memcpy((obj + i), (const void *)(ring + idx),
32);
| ^
../app/test/test_soring.c: In function ‘test_soring_stages’:
../app/test/test_soring.c:157:18: note: at offset 384 into destination object ‘dequeued_objs’ of size 128
157 | uint32_t dequeued_objs[32];
| ^
In function ‘__rte_ring_dequeue_elems_128’,
inlined from ‘__rte_ring_do_dequeue_elems’ at
../lib/ring/rte_ring_elem_pvt.h:279:3,
inlined from ‘soring_dequeue’ at ../lib/ring/soring.c:315:3, inlined from ‘rte_soring_dequeue_bulk’ at ../lib/ring/soring.c:552:9, inlined from ‘test_soring_stages’ at ../app/test/test_soring.c:181:14:
../lib/ring/rte_ring_elem_pvt.h:250:25: warning: writing 32 bytes into a region of size 0 [-Wstringop-overflow=]
250 | memcpy((obj + i), (const void *)(ring + idx),
32);
| ^
../app/test/test_soring.c: In function ‘test_soring_stages’:
../app/test/test_soring.c:157:18: note: at offset 416 into destination object ‘dequeued_objs’ of size 128
157 | uint32_t dequeued_objs[32];
| ^
In function ‘__rte_ring_dequeue_elems_128’,
inlined from ‘__rte_ring_do_dequeue_elems’ at
../lib/ring/rte_ring_elem_pvt.h:279:3,
inlined from ‘soring_dequeue’ at ../lib/ring/soring.c:315:3, inlined from ‘rte_soring_dequeue_bulk’ at ../lib/ring/soring.c:552:9, inlined from ‘test_soring_stages’ at ../app/test/test_soring.c:181:14:
../lib/ring/rte_ring_elem_pvt.h:250:25: warning: writing 32 bytes into a region of size 0 [-Wstringop-overflow=]
250 | memcpy((obj + i), (const void *)(ring + idx),
32);
| ^
../app/test/test_soring.c: In function ‘test_soring_stages’:
../app/test/test_soring.c:157:18: note: at offset 448 into destination object ‘dequeued_objs’ of size 128
157 | uint32_t dequeued_objs[32];
| ^
In function ‘__rte_ring_dequeue_elems_128’,
inlined from ‘__rte_ring_do_dequeue_elems’ at
../lib/ring/rte_ring_elem_pvt.h:279:3,
inlined from ‘soring_dequeue’ at ../lib/ring/soring.c:315:3, inlined from ‘rte_soring_dequeue_bulk’ at ../lib/ring/soring.c:552:9, inlined from ‘test_soring_stages’ at ../app/test/test_soring.c:181:14:
../lib/ring/rte_ring_elem_pvt.h:250:25: warning: writing 32 bytes into a region of size 0 [-Wstringop-overflow=]
250 | memcpy((obj + i), (const void *)(ring + idx),
32);
| ^
../app/test/test_soring.c: In function ‘test_soring_stages’:
../app/test/test_soring.c:157:18: note: at offset 480 into destination object ‘dequeued_objs’ of size 128

  157 |         uint32_t dequeued_objs[32];
      |

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