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authorAlexander Aring <aahringo@redhat.com>2022-10-27 22:45:12 +0200
committerDavid Teigland <teigland@redhat.com>2022-11-08 19:59:41 +0100
commitf0f4bb431bd543ed7bebbaea3ce326cfcd5388bc (patch)
treea95bfd2702d2804844ddf67ea061c8bcc738cc52 /fs/dlm
parentfs: dlm: fix sock release if listen fails (diff)
downloadlinux-f0f4bb431bd543ed7bebbaea3ce326cfcd5388bc.tar.xz
linux-f0f4bb431bd543ed7bebbaea3ce326cfcd5388bc.zip
fs: dlm: retry accept() until -EAGAIN or error returns
This patch fixes a race if we get two times an socket data ready event while the listen connection worker is queued. Currently it will be served only once but we need to do it (in this case twice) until we hit -EAGAIN which tells us there is no pending accept going on. This patch wraps an do while loop until we receive a return value which is different than 0 as it was done before commit d11ccd451b65 ("fs: dlm: listen socket out of connection hash"). Cc: stable@vger.kernel.org Fixes: d11ccd451b65 ("fs: dlm: listen socket out of connection hash") Signed-off-by: Alexander Aring <aahringo@redhat.com> Signed-off-by: David Teigland <teigland@redhat.com>
Diffstat (limited to 'fs/dlm')
-rw-r--r--fs/dlm/lowcomms.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c
index 2cb9f3b49e05..871d4e9f49fb 100644
--- a/fs/dlm/lowcomms.c
+++ b/fs/dlm/lowcomms.c
@@ -1543,7 +1543,11 @@ static void process_recv_sockets(struct work_struct *work)
static void process_listen_recv_socket(struct work_struct *work)
{
- accept_from_sock(&listen_con);
+ int ret;
+
+ do {
+ ret = accept_from_sock(&listen_con);
+ } while (!ret);
}
static void dlm_connect(struct connection *con)