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btrfs-progs: fix fd leak in resolve_loop_device_with_loopdev

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Resolves-coverity-id: 1339300
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2015-11-13 19:15:27 +01:00
parent a343805d58
commit e7c0e3f343
1 changed files with 10 additions and 5 deletions
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15
utils.c
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@ -1180,20 +1180,25 @@ static int is_loop_device (const char* device) {
static int resolve_loop_device_with_loopdev(const char* loop_dev, char* loop_file)
{
int fd;
int ret;
struct loop_info64 lo64;
fd = open(loop_dev, O_RDONLY | O_NONBLOCK);
if (fd < 0)
return -errno;
if (ioctl(fd, LOOP_GET_STATUS64, &lo64) < 0)
return -errno;
ret = ioctl(fd, LOOP_GET_STATUS64, &lo64);
if (ret < 0) {
ret = -errno;
goto out;
}
memcpy(loop_file, lo64.lo_file_name, sizeof(lo64.lo_file_name));
loop_file[sizeof(lo64.lo_file_name)] = 0;
if (close(fd) < 0)
return -errno;
return 0;
out:
close(fd);
return ret;
}
/* Takes a loop device path (e.g. /dev/loop0) and returns