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[195.14.219.6]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-499788a5be9sm59313635e9.4.2026.08.11.04.51.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 11 Aug 2026 04:51:26 -0700 (PDT) From: Vasileios Almpanis To: syzbot+a4ccdd7ebf452e4d4701@syzkaller.appspotmail.com Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Subject: io_uring/cmd: don't skip completion for a non-armed multishot uring_cmd Date: Tue, 11 Aug 2026 13:51:23 +0200 Message-ID: <20260811115125.1831170-1-vasilisalmpanis@gmail.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <6a7a0194.b50370da.49fe0.0056.GAE@google.com> References: <6a7a0194.b50370da.49fe0.0056.GAE@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" #syz test: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git= 06cf61899d6498b33e4b7c87d99d5bd471ccc375 diff --git a/io_uring/uring_cmd.c b/io_uring/uring_cmd.c index c14c22cff49e..a2899a852879 100644 Reported-by: syzbot+a4ccdd7ebf452e4d4701@syzkaller.appspotmail.com Tested-by: syzbot+a4ccdd7ebf452e4d4701@syzkaller.appspotmail.com --- a/io_uring/uring_cmd.c +++ b/io_uring/uring_cmd.c @@ -269,7 +269,8 @@ int io_uring_cmd(struct io_kiocb *req, unsigned int iss= ue_flags) } =20 ret =3D file->f_op->uring_cmd(ioucmd, issue_flags); - if (ioucmd->flags & IORING_URING_CMD_MULTISHOT) { + if ((ioucmd->flags & IORING_URING_CMD_MULTISHOT) && + (req->flags & REQ_F_APOLL_MULTISHOT)) { if (ret >=3D 0) return IOU_ISSUE_SKIP_COMPLETE; }