[PATCH v5 2/5] pdump: check getenv return value
From: Reshma Pattan <hidden>
Date: 2016-06-24 16:36:27
Subsystem:
library code, the rest · Maintainers:
Andrew Morton, Linus Torvalds
inside pdump_get_socket_path(), getenv can return
a NULL pointer if the match for SOCKET_PATH_HOME is
not found in the environment. NULL check is added to
return -1 immediately. Since pdump_get_socket_path()
returns -1 now, wherever this function is called
there the return value is checked and error message
is logged.
Coverity issue 127344: return value check
Coverity issue 127347: null pointer dereference
Fixes: 278f945402c5 ("pdump: add new library for packet capture")
Signed-off-by: Reshma Pattan <redacted>
---
lib/librte_pdump/rte_pdump.c | 43 ++++++++++++++++++++++++++++++++++++++-----
1 file changed, 38 insertions(+), 5 deletions(-)
diff --git a/lib/librte_pdump/rte_pdump.c b/lib/librte_pdump/rte_pdump.c
index 70efd96..e3b03a6 100644
--- a/lib/librte_pdump/rte_pdump.c
+++ b/lib/librte_pdump/rte_pdump.c@@ -443,7 +443,7 @@ set_pdump_rxtx_cbs(struct pdump_request *p) } /* get socket path (/var/run if root, $HOME otherwise) */ -static void +static int pdump_get_socket_path(char *buffer, int bufsz, enum rte_pdump_socktype type) { char dpdk_dir[PATH_MAX] = {0};
@@ -457,6 +457,13 @@ pdump_get_socket_path(char *buffer, int bufsz, enum rte_pdump_socktype type) else { if (getuid() != 0) { dir_home = getenv(SOCKET_PATH_HOME); + if (!dir_home) { + RTE_LOG(ERR, PDUMP, + "Failed to get environment variable" + " value for %s, %s:%d\n", + SOCKET_PATH_HOME, __func__, __LINE__); + return -1; + } snprintf(dpdk_dir, sizeof(dpdk_dir), "%s%s", dir_home, DPDK_DIR); } else
@@ -474,6 +481,8 @@ pdump_get_socket_path(char *buffer, int bufsz, enum rte_pdump_socktype type) else snprintf(buffer, bufsz, CLIENT_SOCKET, dir, getpid(), rte_sys_gettid()); + + return 0; } static int
@@ -483,8 +492,14 @@ pdump_create_server_socket(void) struct sockaddr_un addr; socklen_t addr_len; - pdump_get_socket_path(addr.sun_path, sizeof(addr.sun_path), + ret = pdump_get_socket_path(addr.sun_path, sizeof(addr.sun_path), RTE_PDUMP_SOCKET_SERVER); + if (ret != 0) { + RTE_LOG(ERR, PDUMP, + "Failed to get server socket path: %s:%d\n", + __func__, __LINE__); + return -1; + } addr.sun_family = AF_UNIX; /* remove if file already exists */
@@ -615,8 +630,14 @@ rte_pdump_uninit(void) struct sockaddr_un addr; - pdump_get_socket_path(addr.sun_path, sizeof(addr.sun_path), + ret = pdump_get_socket_path(addr.sun_path, sizeof(addr.sun_path), RTE_PDUMP_SOCKET_SERVER); + if (ret != 0) { + RTE_LOG(ERR, PDUMP, + "Failed to get server socket path: %s:%d\n", + __func__, __LINE__); + return -1; + } ret = unlink(addr.sun_path); if (ret != 0) { RTE_LOG(ERR, PDUMP,
@@ -650,8 +671,14 @@ pdump_create_client_socket(struct pdump_request *p) return ret; } - pdump_get_socket_path(addr.sun_path, sizeof(addr.sun_path), + ret = pdump_get_socket_path(addr.sun_path, sizeof(addr.sun_path), RTE_PDUMP_SOCKET_CLIENT); + if (ret != 0) { + RTE_LOG(ERR, PDUMP, + "Failed to get client socket path: %s:%d\n", + __func__, __LINE__); + return -1; + } addr.sun_family = AF_UNIX; addr_len = sizeof(struct sockaddr_un);
@@ -667,9 +694,15 @@ pdump_create_client_socket(struct pdump_request *p) serv_len = sizeof(struct sockaddr_un); memset(&serv_addr, 0, sizeof(serv_addr)); - pdump_get_socket_path(serv_addr.sun_path, + ret = pdump_get_socket_path(serv_addr.sun_path, sizeof(serv_addr.sun_path), RTE_PDUMP_SOCKET_SERVER); + if (ret != 0) { + RTE_LOG(ERR, PDUMP, + "Failed to get server socket path: %s:%d\n", + __func__, __LINE__); + break; + } serv_addr.sun_family = AF_UNIX; n = sendto(socket_fd, p, sizeof(struct pdump_request), 0,
--
2.5.0