RepoMirrors
/
mars
mirror of https://github.com/schoebel/mars
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

aio: fix potential race on fd

This commit is contained in:
Thomas Schoebel-Theuer 2019-04-12 07:36:37 +02:00
parent 8e1b163936
commit 25fde8b5f9
1 changed files with 9 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
kernel/mars_aio.c
View File

@ -727,6 +727,8 @@ static DEFINE_MUTEX(_fd_lock);
static
void _destroy_ioctx(struct aio_output *output)
{
int fd;
if (unlikely(!output))
goto done;
@ -748,11 +750,14 @@ void _destroy_ioctx(struct aio_output *output)
output->ctxp = 0;
}
if (likely(output->fd >= 0)) {
MARS_DBG("destroying fd %d\n", output->fd);
fd_uninstall(output->fd);
put_unused_fd(output->fd);
fd = output->fd;
if (likely(fd >= 0)) {
MARS_DBG("destroying fd %d\n", fd);
mutex_lock(&_fd_lock);
fd_uninstall(fd);
put_unused_fd(fd);
output->fd = -1;
mutex_unlock(&_fd_lock);
}
done: