ps: fix SEGV on narrow screens. closes 8176

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 7 insertions, 5 deletions

diff --git a/procps/ps.c b/procps/ps.c
index c65fa012a..bde5f9485 100644
--- a/procps/ps.c
+++ b/procps/ps.c
@@ -654,8 +654,8 @@ int ps_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
                 OPT_l = (1 << ENABLE_SELINUX) * (1 << ENABLE_FEATURE_SHOW_THREADS) * ENABLE_FEATURE_PS_LONG,
         };
 #if ENABLE_FEATURE_PS_LONG
-        time_t now = now;
-        unsigned long uptime;
+        time_t now = now; /* for compiler */
+        unsigned long uptime = uptime;
 #endif
         /* If we support any options, parse argv */
 #if ENABLE_SELINUX || ENABLE_FEATURE_SHOW_THREADS || ENABLE_FEATURE_PS_WIDE || ENABLE_FEATURE_PS_LONG
@@ -786,9 +786,11 @@ int ps_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
 
                 {
                         int sz = terminal_width - len;
-                        char buf[sz + 1];
-                        read_cmdline(buf, sz, p->pid, p->comm);
-                        puts(buf);
+                        if (sz >= 0) {
+                                char buf[sz + 1];
+                                read_cmdline(buf, sz, p->pid, p->comm);
+                                puts(buf);
+                        }
                 }
         }
         if (ENABLE_FEATURE_CLEAN_UP)