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authorDavid Ahern <dsahern@gmail.com>2012-07-29 20:54:35 -0600
committerArnaldo Carvalho de Melo <acme@redhat.com>2012-08-03 10:35:23 -0300
commit347ed9903a10179d1cf733d5d77072b283d89da3 (patch)
treed5d26aedbf34f6d1ce8eb969fa051710f62b1410 /tools
parent56e6f602aa4432f7fe90a0d9ba379b2735b07b6b (diff)
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perf kvm: Use strtol for walking guestmount directory
Only want to process directories under the guestmnount directory that have a pid as a name (ie, all digits). Other entries in the guestmount directory should be ignored. There is already a check that requires the first character of each entry to be a digit, but atoi is used to convert the directory name to a pid. For example if guestmount contains a directory with the name 1foo, atoi converts it to a pid of 1 and a machine is created with a pid of 1. This is wrong; this directory really should be ignored. Use strtol to do that. Signed-off-by: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1343616875-6455-1-git-send-email-dsahern@gmail.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
-rw-r--r--tools/perf/util/symbol.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index fe86612afadc..8b63b678e127 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -2875,6 +2875,7 @@ int machines__create_guest_kernel_maps(struct rb_root *machines)
int i, items = 0;
char path[PATH_MAX];
pid_t pid;
+ char *endp;
if (symbol_conf.default_guest_vmlinux_name ||
symbol_conf.default_guest_modules ||
@@ -2891,7 +2892,14 @@ int machines__create_guest_kernel_maps(struct rb_root *machines)
/* Filter out . and .. */
continue;
}
- pid = atoi(namelist[i]->d_name);
+ pid = (pid_t)strtol(namelist[i]->d_name, &endp, 10);
+ if ((*endp != '\0') ||
+ (endp == namelist[i]->d_name) ||
+ (errno == ERANGE)) {
+ pr_debug("invalid directory (%s). Skipping.\n",
+ namelist[i]->d_name);
+ continue;
+ }
sprintf(path, "%s/%s/proc/kallsyms",
symbol_conf.guestmount,
namelist[i]->d_name);