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Tue, 27 Aug 2024 21:33:49 -0700 (PDT) Received: from wheely.local0.net ([1.146.81.12]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2038557f093sm90342325ad.63.2024.08.27.21.33.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 27 Aug 2024 21:33:49 -0700 (PDT) From: Nicholas Piggin To: Peter Maydell Cc: Nicholas Piggin , =?utf-8?q?Alex_Benn=C3=A9e?= , qemu-devel@nongnu.org Subject: [PATCH 1/2] chardev: Fix record/replay error path NULL deref in device creation Date: Wed, 28 Aug 2024 14:33:34 +1000 Message-ID: <20240828043337.14587-2-npiggin@gmail.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240828043337.14587-1-npiggin@gmail.com> References: <20240828043337.14587-1-npiggin@gmail.com> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::62d; envelope-from=npiggin@gmail.com; helo=mail-pl1-x62d.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org qemu_chardev_set_replay() was being called in chardev creation to set up replay parameters even if the chardev is NULL. A segfault can be reproduced by specifying '-serial chardev:bad' with an rr=record mode. Fix this with a NULL pointer check. Reported-by: Peter Maydell Resolves: Coverity CID 1559470 Fixes: 4c193bb129dae ("chardev: set record/replay on the base device of a muxed device") Signed-off-by: Nicholas Piggin Reviewed-by: Peter Maydell --- chardev/char.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/chardev/char.c b/chardev/char.c index ba847b6e9e..47a744ebeb 100644 --- a/chardev/char.c +++ b/chardev/char.c @@ -721,7 +721,7 @@ static Chardev *__qemu_chr_new(const char *label, const char *filename, if (strstart(filename, "chardev:", &p)) { chr = qemu_chr_find(p); - if (replay) { + if (replay && chr) { qemu_chardev_set_replay(chr, &err); if (err) { error_report_err(err); From patchwork Wed Aug 28 04:33:35 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicholas Piggin X-Patchwork-Id: 1977581 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; 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Tue, 27 Aug 2024 21:33:53 -0700 (PDT) Received: from wheely.local0.net ([1.146.81.12]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2038557f093sm90342325ad.63.2024.08.27.21.33.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 27 Aug 2024 21:33:52 -0700 (PDT) From: Nicholas Piggin To: Peter Maydell Cc: Nicholas Piggin , =?utf-8?q?Alex_Benn=C3=A9e?= , qemu-devel@nongnu.org Subject: [PATCH 2/2] chardev: Remove __-prefixed names Date: Wed, 28 Aug 2024 14:33:35 +1000 Message-ID: <20240828043337.14587-3-npiggin@gmail.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240828043337.14587-1-npiggin@gmail.com> References: <20240828043337.14587-1-npiggin@gmail.com> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::634; envelope-from=npiggin@gmail.com; helo=mail-pl1-x634.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Peter points out double underscore prefix names tend to be reserved for the system. Clean these up. Suggested-by: Peter Maydell Signed-off-by: Nicholas Piggin Reviewed-by: Peter Maydell --- chardev/char.c | 20 +++++++++++--------- 1 file changed, 11 insertions(+), 9 deletions(-) diff --git a/chardev/char.c b/chardev/char.c index 47a744ebeb..46d4798e4e 100644 --- a/chardev/char.c +++ b/chardev/char.c @@ -628,8 +628,8 @@ static void qemu_chardev_set_replay(Chardev *chr, Error **errp) } } -static Chardev *__qemu_chr_new_from_opts(QemuOpts *opts, GMainContext *context, - bool replay, Error **errp) +static Chardev *do_qemu_chr_new_from_opts(QemuOpts *opts, GMainContext *context, + bool replay, Error **errp) { const ChardevClass *cc; Chardev *base = NULL, *chr = NULL; @@ -707,12 +707,12 @@ Chardev *qemu_chr_new_from_opts(QemuOpts *opts, GMainContext *context, Error **errp) { /* XXX: should this really not record/replay? */ - return __qemu_chr_new_from_opts(opts, context, false, errp); + return do_qemu_chr_new_from_opts(opts, context, false, errp); } -static Chardev *__qemu_chr_new(const char *label, const char *filename, - bool permit_mux_mon, GMainContext *context, - bool replay) +static Chardev *qemu_chr_new_from_name(const char *label, const char *filename, + bool permit_mux_mon, + GMainContext *context, bool replay) { const char *p; Chardev *chr; @@ -735,7 +735,7 @@ static Chardev *__qemu_chr_new(const char *label, const char *filename, if (!opts) return NULL; - chr = __qemu_chr_new_from_opts(opts, context, replay, &err); + chr = do_qemu_chr_new_from_opts(opts, context, replay, &err); if (!chr) { error_report_err(err); goto out; @@ -760,7 +760,8 @@ out: Chardev *qemu_chr_new_noreplay(const char *label, const char *filename, bool permit_mux_mon, GMainContext *context) { - return __qemu_chr_new(label, filename, permit_mux_mon, context, false); + return qemu_chr_new_from_name(label, filename, permit_mux_mon, context, + false); } static Chardev *qemu_chr_new_permit_mux_mon(const char *label, @@ -768,7 +769,8 @@ static Chardev *qemu_chr_new_permit_mux_mon(const char *label, bool permit_mux_mon, GMainContext *context) { - return __qemu_chr_new(label, filename, permit_mux_mon, context, true); + return qemu_chr_new_from_name(label, filename, permit_mux_mon, context, + true); } Chardev *qemu_chr_new(const char *label, const char *filename,