linux-kernel - [PATCH] Fix Hybrid Polling initialization issue

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250508021822.1781033-1-xue01.he@samsung.com>
Date: Thu,  8 May 2025 10:18:22 +0800
From: hexue <xue01.he@...sung.com>
To: axboe@...nel.dk, asml.silence@...il.com, io-uring@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: peiwei.li@...sung.com, hexue <xue01.he@...sung.com>
Subject: [PATCH] Fix Hybrid Polling initialization issue

Modify the defect that the timer is not initialized during IO transfer
when passthrough is used with hybrid polling to ensure that the program
can run normally.

Signed-off-by: hexue <xue01.he@...sung.com>
---
 io_uring/uring_cmd.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/io_uring/uring_cmd.c b/io_uring/uring_cmd.c
index e6701b7aa147..678a2f7d14ff 100644
--- a/io_uring/uring_cmd.c
+++ b/io_uring/uring_cmd.c
@@ -244,6 +244,11 @@ int io_uring_cmd(struct io_kiocb *req, unsigned int issue_flags)
 			return -EOPNOTSUPP;
 		issue_flags |= IO_URING_F_IOPOLL;
 		req->iopoll_completed = 0;
+		if (ctx->flags & IORING_SETUP_HYBRID_IOPOLL) {
+			/* make sure every req only blocks once */
+			req->flags &= ~REQ_F_IOPOLL_STATE;
+			req->iopoll_start = ktime_get_ns();
+		}
 	}
 
 	ret = file->f_op->uring_cmd(ioucmd, issue_flags);
-- 
2.43.0