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X-MS-Exchange-CrossTenant-OriginalArrivalTime: 17 Nov 2025 08:50:15.1944 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 46c98d88-e344-4ed4-8496-4ed7712e255d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 0w3c8byNxzXdxWatJUqyA8y+3oTq6pVQ6qDDOragMbfQ6KE/HClenUOqC/9H7MKlEFur1G33b+GTYW0m41gVfviUhIPHmZOPYoASusn1ivw= X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ5PPF0DADD6EFE X-OriginatorOrg: intel.com X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org On Sat, Nov 15, 2025 at 11:36:36AM -0800, Stephen Hemminger wrote: > If format-truncation is enabled, the compiler detects a string overflow > since the snprintf() is putting ethernet address and new line > in buffer only sized for the address. > > Since get_rx_queue_name() is used to create a ring name. > The buffer should be sized to be a valid ring name. > This fixes some format-overflow warnings and also corrects > for future errors. > > In file included from ../examples/server_node_efd/efd_server/main.c:31: > In function ‘get_printable_mac_addr’, > inlined from ‘do_stats_display’ at ../examples/server_node_efd/efd_server/main.c:136:3: > ../lib/net/rte_ether.h:248:36: warning: ‘snprintf’ output truncated before the last format character [-Wformat-truncation=] > 248 | #define RTE_ETHER_ADDR_PRT_FMT "%02X:%02X:%02X:%02X:%02X:%02X" > | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > ../examples/server_node_efd/efd_server/main.c:86:33: note: in expansion of macro ‘RTE_ETHER_ADDR_PRT_FMT’ > 86 | RTE_ETHER_ADDR_PRT_FMT "\n", > | ^~~~~~~~~~~~~~~~~~~~~~ > ../examples/server_node_efd/efd_server/main.c: In function ‘do_stats_display’: > ../examples/server_node_efd/efd_server/main.c:86:59: note: format string is defined here > 86 | RTE_ETHER_ADDR_PRT_FMT "\n", > | > > Fixes: 39aad0e88c58 ("examples/flow_distributor: new example to demonstrate EFD") > Cc: stable@dpdk.org > > Signed-off-by: Stephen Hemminger Acked-by: Bruce Richardson > --- > examples/server_node_efd/efd_server/main.c | 2 +- > examples/server_node_efd/shared/common.h | 3 ++- > 2 files changed, 3 insertions(+), 2 deletions(-) > > diff --git a/examples/server_node_efd/efd_server/main.c b/examples/server_node_efd/efd_server/main.c > index 75ff0ea532..62c3f4a16d 100644 > --- a/examples/server_node_efd/efd_server/main.c > +++ b/examples/server_node_efd/efd_server/main.c > @@ -68,7 +68,7 @@ static const char * > get_printable_mac_addr(uint16_t port) > { > static const char err_address[] = "00:00:00:00:00:00"; > - static char addresses[RTE_MAX_ETHPORTS][sizeof(err_address)]; > + static char addresses[RTE_MAX_ETHPORTS][RTE_ETHER_ADDR_FMT_SIZE + 1]; > struct rte_ether_addr mac; > int ret; > > diff --git a/examples/server_node_efd/shared/common.h b/examples/server_node_efd/shared/common.h > index e1ab7e62b7..6726e2031e 100644 > --- a/examples/server_node_efd/shared/common.h > +++ b/examples/server_node_efd/shared/common.h > @@ -58,8 +58,9 @@ get_rx_queue_name(unsigned int id) > /* > * Buffer for return value. Size calculated by %u being replaced > * by maximum 3 digits (plus an extra byte for safety) > + * Used as ring name, so upper limit is ring name size. > */ > - static char buffer[sizeof(MP_NODE_RXQ_NAME) + 2]; > + static char buffer[RTE_RING_NAMESIZE]; > > snprintf(buffer, sizeof(buffer), MP_NODE_RXQ_NAME, id); > return buffer; > -- > 2.51.0 >