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bgpd : aggregate-address memory leak fix
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Memory leaks are observed in the cleanup code. When “no router bgp" is executed,
cleanup in that flow for aggregate-address command is not taken care.

fixes the below leak:
    --
    ./bgp_local_asn_dot.test_bgp_local_asn_dot_agg/r3.bgpd.asan.3410444:Direct leak of 152 byte(s) in 1 object(s) allocated from:
    ./bgp_local_asn_dot.test_bgp_local_asn_dot_agg/r3.bgpd.asan.3410444-    #0 0x7f163e911037 in __interceptor_calloc ../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:154
    ./bgp_local_asn_dot.test_bgp_local_asn_dot_agg/r3.bgpd.asan.3410444-    sonic-net#1 0x7f163e4b9259 in qcalloc lib/memory.c:105
    ./bgp_local_asn_dot.test_bgp_local_asn_dot_agg/r3.bgpd.asan.3410444-    sonic-net#2 0x562bf42ebbd5 in bgp_aggregate_new bgpd/bgp_route.c:7239
    ./bgp_local_asn_dot.test_bgp_local_asn_dot_agg/r3.bgpd.asan.3410444-    sonic-net#3 0x562bf42f14e8 in bgp_aggregate_set bgpd/bgp_route.c:8421
    ./bgp_local_asn_dot.test_bgp_local_asn_dot_agg/r3.bgpd.asan.3410444-    sonic-net#4 0x562bf42f1e55 in aggregate_addressv6_magic bgpd/bgp_route.c:8592
    ./bgp_local_asn_dot.test_bgp_local_asn_dot_agg/r3.bgpd.asan.3410444-    sonic-net#5 0x562bf42be3f5 in aggregate_addressv6 bgpd/bgp_route_clippy.c:341
    ./bgp_local_asn_dot.test_bgp_local_asn_dot_agg/r3.bgpd.asan.3410444-    sonic-net#6 0x7f163e3f1e1b in cmd_execute_command_real lib/command.c:988
    ./bgp_local_asn_dot.test_bgp_local_asn_dot_agg/r3.bgpd.asan.3410444-    sonic-net#7 0x7f163e3f219c in cmd_execute_command lib/command.c:1048
    ./bgp_local_asn_dot.test_bgp_local_asn_dot_agg/r3.bgpd.asan.3410444-    sonic-net#8 0x7f163e3f2df4 in cmd_execute lib/command.c:1215
    ./bgp_local_asn_dot.test_bgp_local_asn_dot_agg/r3.bgpd.asan.3410444-    sonic-net#9 0x7f163e5a2d73 in vty_command lib/vty.c:544
    ./bgp_local_asn_dot.test_bgp_local_asn_dot_agg/r3.bgpd.asan.3410444-    sonic-net#10 0x7f163e5a79c8 in vty_execute lib/vty.c:1307
    ./bgp_local_asn_dot.test_bgp_local_asn_dot_agg/r3.bgpd.asan.3410444-    sonic-net#11 0x7f163e5ad299 in vtysh_read lib/vty.c:2216
    ./bgp_local_asn_dot.test_bgp_local_asn_dot_agg/r3.bgpd.asan.3410444-    sonic-net#12 0x7f163e593f16 in event_call lib/event.c:1995
    ./bgp_local_asn_dot.test_bgp_local_asn_dot_agg/r3.bgpd.asan.3410444-    sonic-net#13 0x7f163e47c839 in frr_run lib/libfrr.c:1185
    ./bgp_local_asn_dot.test_bgp_local_asn_dot_agg/r3.bgpd.asan.3410444-    sonic-net#14 0x562bf414e58d in main bgpd/bgp_main.c:505
    ./bgp_local_asn_dot.test_bgp_local_asn_dot_agg/r3.bgpd.asan.3410444-    sonic-net#15 0x7f163de66d09 in __libc_start_main ../csu/libc-start.c:308
    ./bgp_local_asn_dot.test_bgp_local_asn_dot_agg/r3.bgpd.asan.3410444-
    ./bgp_local_asn_dot.test_bgp_local_asn_dot_agg/r3.bgpd.asan.3410444:Direct leak of 152 byte(s) in 1 object(s) allocated from:
    ./bgp_local_asn_dot.test_bgp_local_asn_dot_agg/r3.bgpd.asan.3410444-    #0 0x7f163e911037 in __interceptor_calloc ../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:154
    ./bgp_local_asn_dot.test_bgp_local_asn_dot_agg/r3.bgpd.asan.3410444-    sonic-net#1 0x7f163e4b9259 in qcalloc lib/memory.c:105
    ./bgp_local_asn_dot.test_bgp_local_asn_dot_agg/r3.bgpd.asan.3410444-    sonic-net#2 0x562bf42ebbd5 in bgp_aggregate_new bgpd/bgp_route.c:7239
    ./bgp_local_asn_dot.test_bgp_local_asn_dot_agg/r3.bgpd.asan.3410444-    sonic-net#3 0x562bf42f14e8 in bgp_aggregate_set bgpd/bgp_route.c:8421
    ./bgp_local_asn_dot.test_bgp_local_asn_dot_agg/r3.bgpd.asan.3410444-    sonic-net#4 0x562bf42f1cde in aggregate_addressv4_magic bgpd/bgp_route.c:8543
    ./bgp_local_asn_dot.test_bgp_local_asn_dot_agg/r3.bgpd.asan.3410444-    sonic-net#5 0x562bf42bd258 in aggregate_addressv4 bgpd/bgp_route_clippy.c:255
    ./bgp_local_asn_dot.test_bgp_local_asn_dot_agg/r3.bgpd.asan.3410444-    sonic-net#6 0x7f163e3f1e1b in cmd_execute_command_real lib/command.c:988
    ./bgp_local_asn_dot.test_bgp_local_asn_dot_agg/r3.bgpd.asan.3410444-    sonic-net#7 0x7f163e3f219c in cmd_execute_command lib/command.c:1048
    ./bgp_local_asn_dot.test_bgp_local_asn_dot_agg/r3.bgpd.asan.3410444-    sonic-net#8 0x7f163e3f2df4 in cmd_execute lib/command.c:1215
    ./bgp_local_asn_dot.test_bgp_local_asn_dot_agg/r3.bgpd.asan.3410444-    sonic-net#9 0x7f163e5a2d73 in vty_command lib/vty.c:544
    ./bgp_local_asn_dot.test_bgp_local_asn_dot_agg/r3.bgpd.asan.3410444-    sonic-net#10 0x7f163e5a79c8 in vty_execute lib/vty.c:1307
    ./bgp_local_asn_dot.test_bgp_local_asn_dot_agg/r3.bgpd.asan.3410444-    sonic-net#11 0x7f163e5ad299 in vtysh_read lib/vty.c:2216
    ./bgp_local_asn_dot.test_bgp_local_asn_dot_agg/r3.bgpd.asan.3410444-    sonic-net#12 0x7f163e593f16 in event_call lib/event.c:1995
    ./bgp_local_asn_dot.test_bgp_local_asn_dot_agg/r3.bgpd.asan.3410444-    sonic-net#13 0x7f163e47c839 in frr_run lib/libfrr.c:1185
    ./bgp_local_asn_dot.test_bgp_local_asn_dot_agg/r3.bgpd.asan.3410444-    sonic-net#14 0x562bf414e58d in main bgpd/bgp_main.c:505
    ./bgp_local_asn_dot.test_bgp_local_asn_dot_agg/r3.bgpd.asan.3410444-    sonic-net#15 0x7f163de66d09 in __libc_start_main ../csu/libc-start.c:308
    ./bgp_local_asn_dot.test_bgp_local_asn_dot_agg/r3.bgpd.asan.3410444-
    ./bgp_local_asn_dot.test_bgp_local_asn_dot_agg/r3.bgpd.asan.3410444-SUMMARY: AddressSanitizer: 304 byte(s) leaked in 2 allocation(s).

Signed-off-by: Samanvitha B Bhargav <[email protected]>
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@samanvithab
samanvithab committed Mar 30, 2023
1 parent 6baf6b1 commit 7a70d99
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Showing 3 changed files with 47 additions and 24 deletions.
53 changes: 29 additions & 24 deletions bgpd/bgp_route.c
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Original file line number Diff line number Diff line change
Expand Up @@ -8338,30 +8338,7 @@ static int bgp_aggregate_unset(struct vty *vty, const char *prefix_str,
/* Unlock aggregate address configuration. */
bgp_dest_set_bgp_aggregate_info(dest, NULL);

if (aggregate->community)
community_free(&aggregate->community);

hash_clean_and_free(&aggregate->community_hash,
bgp_aggr_community_remove);

if (aggregate->ecommunity)
ecommunity_free(&aggregate->ecommunity);

hash_clean_and_free(&aggregate->ecommunity_hash,
bgp_aggr_ecommunity_remove);

if (aggregate->lcommunity)
lcommunity_free(&aggregate->lcommunity);

hash_clean_and_free(&aggregate->lcommunity_hash,
bgp_aggr_lcommunity_remove);

if (aggregate->aspath)
aspath_free(aggregate->aspath);

hash_clean_and_free(&aggregate->aspath_hash, bgp_aggr_aspath_remove);

bgp_aggregate_free(aggregate);
bgp_free_aggregate_info(aggregate);
bgp_dest_unlock_node(dest);
bgp_dest_unlock_node(dest);

Expand Down Expand Up @@ -8545,6 +8522,34 @@ DEFPY(aggregate_addressv4, aggregate_addressv4_cmd,
match_med != NULL, suppress_map);
}

void bgp_free_aggregate_info(struct bgp_aggregate *aggregate)
{
if (aggregate->community)
community_free(&aggregate->community);

hash_clean_and_free(&aggregate->community_hash,
bgp_aggr_community_remove);

if (aggregate->ecommunity)
ecommunity_free(&aggregate->ecommunity);

hash_clean_and_free(&aggregate->ecommunity_hash,
bgp_aggr_ecommunity_remove);

if (aggregate->lcommunity)
lcommunity_free(&aggregate->lcommunity);

hash_clean_and_free(&aggregate->lcommunity_hash,
bgp_aggr_lcommunity_remove);

if (aggregate->aspath)
aspath_free(aggregate->aspath);

hash_clean_and_free(&aggregate->aspath_hash, bgp_aggr_aspath_remove);

bgp_aggregate_free(aggregate);
}

DEFPY(aggregate_addressv6, aggregate_addressv6_cmd,
"[no] aggregate-address X:X::X:X/M$prefix [{"
"as-set$as_set_s"
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1 change: 1 addition & 0 deletions bgpd/bgp_route.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -661,6 +661,7 @@ extern void bgp_process_queue_init(struct bgp *bgp);
extern void bgp_route_init(void);
extern void bgp_route_finish(void);
extern void bgp_cleanup_routes(struct bgp *);
extern void bgp_free_aggregate_info(struct bgp_aggregate *aggregate);
extern void bgp_announce_route(struct peer *peer, afi_t afi, safi_t safi,
bool force);
extern void bgp_stop_announce_route_timer(struct peer_af *paf);
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17 changes: 17 additions & 0 deletions bgpd/bgpd.c
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Original file line number Diff line number Diff line change
Expand Up @@ -3844,6 +3844,23 @@ int bgp_delete(struct bgp *bgp)
#ifdef ENABLE_BGP_VNC
rfapi_delete(bgp);
#endif

/* Free memory allocated with aggregate address configuration. */
FOREACH_AFI_SAFI (afi, safi) {
struct bgp_aggregate *aggregate = NULL;

for (struct bgp_dest *dest =
bgp_table_top(bgp->aggregate[afi][safi]);
dest; dest = bgp_route_next(dest)) {
aggregate = bgp_dest_get_bgp_aggregate_info(dest);
if (aggregate == NULL)
continue;

bgp_dest_set_bgp_aggregate_info(dest, NULL);
bgp_free_aggregate_info(aggregate);
}
}

bgp_cleanup_routes(bgp);

for (afi = 0; afi < AFI_MAX; ++afi) {
Expand Down

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