diff options
| author | Thorsten Winkler <twinkler@linux.ibm.com> | 2023-06-21 15:49:21 +0200 |
|---|---|---|
| committer | Paolo Abeni <pabeni@redhat.com> | 2023-06-23 11:55:55 +0200 |
| commit | 1471d85ffba7d17456670afa1b75e50234caa2c6 (patch) | |
| tree | d98ccc06aa26847aeb4dc1f181edabe9ba8b2b02 /drivers/s390/net/ctcm_mpc.c | |
| parent | d585e4b7480615031f798ef25e4012bfe53ff135 (diff) | |
s390/ctcm: Convert sprintf/snprintf to scnprintf
This LWN article explains the why scnprintf is preferred over snprintf
in general
https://lwn.net/Articles/69419/
Ie. snprintf() returns what *would* be the resulting length, while
scnprintf() returns the actual length.
Note that ctcm_print_statistics() writes the data into the kernel log
and is therefore not suitable for sysfs_emit(). Observable behavior is
not changed, as there may be dependencies.
Reviewed-by: Alexandra Winter <wintera@linux.ibm.com>
Signed-off-by: Thorsten Winkler <twinkler@linux.ibm.com>
Signed-off-by: Alexandra Winter <wintera@linux.ibm.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Diffstat (limited to 'drivers/s390/net/ctcm_mpc.c')
| -rw-r--r-- | drivers/s390/net/ctcm_mpc.c | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/drivers/s390/net/ctcm_mpc.c b/drivers/s390/net/ctcm_mpc.c index b8a226c6e1a9..c44ba88f9f47 100644 --- a/drivers/s390/net/ctcm_mpc.c +++ b/drivers/s390/net/ctcm_mpc.c @@ -144,9 +144,9 @@ void ctcmpc_dumpit(char *buf, int len) for (ct = 0; ct < len; ct++, ptr++, rptr++) { if (sw == 0) { - sprintf(addr, "%16.16llx", (__u64)rptr); + scnprintf(addr, sizeof(addr), "%16.16llx", (__u64)rptr); - sprintf(boff, "%4.4X", (__u32)ct); + scnprintf(boff, sizeof(boff), "%4.4X", (__u32)ct); bhex[0] = '\0'; basc[0] = '\0'; } @@ -155,7 +155,7 @@ void ctcmpc_dumpit(char *buf, int len) if (sw == 8) strcat(bhex, " "); - sprintf(tbuf, "%2.2llX", (__u64)*ptr); + scnprintf(tbuf, sizeof(tbuf), "%2.2llX", (__u64)*ptr); tbuf[2] = '\0'; strcat(bhex, tbuf); @@ -171,8 +171,8 @@ void ctcmpc_dumpit(char *buf, int len) continue; if ((strcmp(duphex, bhex)) != 0) { if (dup != 0) { - sprintf(tdup, - "Duplicate as above to %s", addr); + scnprintf(tdup, sizeof(tdup), + "Duplicate as above to %s", addr); ctcm_pr_debug(" --- %s ---\n", tdup); } @@ -197,14 +197,16 @@ void ctcmpc_dumpit(char *buf, int len) strcat(basc, " "); } if (dup != 0) { - sprintf(tdup, "Duplicate as above to %s", addr); + scnprintf(tdup, sizeof(tdup), + "Duplicate as above to %s", addr); ctcm_pr_debug(" --- %s ---\n", tdup); } ctcm_pr_debug(" %s (+%s) : %s [%s]\n", addr, boff, bhex, basc); } else { if (dup >= 1) { - sprintf(tdup, "Duplicate as above to %s", addr); + scnprintf(tdup, sizeof(tdup), + "Duplicate as above to %s", addr); ctcm_pr_debug(" --- %s ---\n", tdup); } if (dup != 0) { @@ -291,7 +293,7 @@ static struct net_device *ctcmpc_get_dev(int port_num) struct net_device *dev; struct ctcm_priv *priv; - sprintf(device, "%s%i", MPC_DEVICE_NAME, port_num); + scnprintf(device, sizeof(device), "%s%i", MPC_DEVICE_NAME, port_num); dev = __dev_get_by_name(&init_net, device); |