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aio: safeguard potential race on fd_uninstall

This commit is contained in:
Thomas Schoebel-Theuer 2021-02-15 19:22:29 +01:00 committed by Thomas Schoebel-Theuer
parent a615ef907b
commit 8544ef4117
1 changed files with 2 additions and 2 deletions
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4
kernel/mars_aio.c
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@ -834,15 +834,15 @@ void _destroy_ioctx(struct aio_output *output)
#endif
}
mutex_lock(&_fd_lock);
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);
}
mutex_unlock(&_fd_lock);
done:
if (likely(current->mm)) {