From patchwork Wed Mar 22 14:12:04 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andy Shevchenko X-Patchwork-Id: 73455 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:604a:0:0:0:0:0 with SMTP id j10csp2373614wrt; Wed, 22 Mar 2023 07:32:24 -0700 (PDT) X-Google-Smtp-Source: AK7set+/oHUkWr6uh0vZkYadfysJDGS8ykRiiXO29BgoSHTTEVJZ/E9NzLCLjOEmHI00S4Awxdvq X-Received: by 2002:aa7:d890:0:b0:4fa:57bf:1416 with SMTP id u16-20020aa7d890000000b004fa57bf1416mr7319693edq.35.1679495544043; Wed, 22 Mar 2023 07:32:24 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1679495544; cv=none; d=google.com; s=arc-20160816; b=rHPrrDoW/6Y38DD00tgOc2ZWycAlloqPojQ0UnTubRrV3AWP9H7HG+1BY/GLddnLbU gIAjh1gi0Klk+ZS+Eqrec31b8vDCz1xdnjmota8NXmWbzxbohOmBulbA04YZduBDTNJg 0LlLALH3XzBSZt4LUwfjaoEDaQpyAvFCIpNtj6nTO64LU3FW8QuODhnfLLn5Goy7nAuV MPTpJp/WqxQ5nOjXxB84sWT1kHVbbSYIQCupPgtFurckELr0LH5+U6ASkwBx0uLwtT5w 9GKREPRo5QcYkmZ+RCxTD1+3hSegu+hMQ8KPbqqy33GnOR0mzm9E27evWSVfFsqco46x O3/g== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=mk4ZGRYEfeE/GMxDR79aRdln6iwF07NtyhXdPeOdTu4=; b=KDWn1HGo8aCFz5lHMDSZ7j791VKADTSrqPE/7o3kL4lzwVXnqMzjDo8fX7HSNSZGcf yrgKTwfBKh2ta0i1bqkDpsw0gdUM52d2UXHeyrs6x0p4VsXS5VIDkhJkQ8pJ3u4GKphD gzEo87krFY+djlYKyfvYselRMJxh+PLZrOTM/skgdASVYziIs6Tz2T9ulzmnaVByPwZw sBb1LByR0uRwuyaraHC+k4JWDDA3peKTYE5DPwqXutB/7tVTr8QLNc0LdyNlP+LicOFt QeCgZLil+3/Jgz1brhmK8LA66SfpC33NCBNoFEkUn9F12LqCan7+B1J1qUH2+a5zciyF r+ZQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@intel.com header.s=Intel header.b=WheSQgqF; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=intel.com Received: from out1.vger.email (out1.vger.email. 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Wysocki" Subject: [PATCH v1 1/3] jbd2: Avoid printing out the boundary Date: Wed, 22 Mar 2023 16:12:04 +0200 Message-Id: <20230322141206.56347-2-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.40.0.1.gaa8946217a0b In-Reply-To: <20230322141206.56347-1-andriy.shevchenko@linux.intel.com> References: <20230322141206.56347-1-andriy.shevchenko@linux.intel.com> MIME-Version: 1.0 X-Spam-Status: No, score=-2.4 required=5.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_EF,RCVD_IN_DNSWL_MED,SPF_HELO_PASS,SPF_NONE, URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1761078719787076814?= X-GMAIL-MSGID: =?utf-8?q?1761078719787076814?= Theoretically possible that "%pg" will take all room for the j_devname and hence the "-%lu" will go out the boundary due to unconditional sprintf() in use. To make this code more robust, replace two sequential s*printf():s by a single call and then replace forbidden character. It's possible to do this way, because '/' won't ever be in the result of "-%lu". Signed-off-by: Andy Shevchenko Reviewed-by: Jan Kara --- fs/jbd2/journal.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c index 8ae419152ff6..00c0aa4a3a91 100644 --- a/fs/jbd2/journal.c +++ b/fs/jbd2/journal.c @@ -1515,9 +1515,8 @@ journal_t *jbd2_journal_init_inode(struct inode *inode) journal->j_inode = inode; snprintf(journal->j_devname, sizeof(journal->j_devname), - "%pg", journal->j_dev); - p = strreplace(journal->j_devname, '/', '!'); - sprintf(p, "-%lu", journal->j_inode->i_ino); + "%pg-%lu", journal->j_dev, journal->j_inode->i_ino); + strreplace(journal->j_devname, '/', '!'); jbd2_stats_proc_init(journal); return journal; From patchwork Wed Mar 22 14:12:05 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andy Shevchenko X-Patchwork-Id: 73451 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:604a:0:0:0:0:0 with SMTP id j10csp2367917wrt; Wed, 22 Mar 2023 07:20:25 -0700 (PDT) X-Google-Smtp-Source: AK7set9sLV/bs0V640aOl4/OiV1zIXN2Yf5L6fYNGrppedtSBEOU0BJQ0sq57vDRq+EblGZIi3HK X-Received: by 2002:a05:6a20:2db:b0:d5:7862:ece6 with SMTP id 27-20020a056a2002db00b000d57862ece6mr5174388pzb.61.1679494824807; Wed, 22 Mar 2023 07:20:24 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1679494824; cv=none; d=google.com; s=arc-20160816; b=mLOMPMkPT2t+YUfNbR6E5xkHFAJQRUthdCIe/5AHRr2in9cT/CPWvFQbQOhzpx07YH 411fNe5DSjLXcKSDttrfOb6+DRNRZc74Q+RR1pAh0L9aTwJ9AdIH21nFJefP8GB4GI8R 6ZpkvdW5afu+ylRWE5xrrc1A2Bgr+IILvuxivnB0vZYC1JTNik0PXpoaQhybtVtSpQQ5 EuT3ETFrr0PdjT6+F49okFZq8Z+bm70gTmfr5VQdE7l0bzHu6IYRCXHICWz+n+GSE1Mf lC6VDKT87gfCMcAtrLFygUs/TiRJhRLEgSwrBnG3XyNBsekssYTxLSwCbRxnTV5TWoAB pZPw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=Ouf9t8qXXHWkttHBfGAUAmAKK4TkqZUgzIt4tUy7FFE=; b=KppzTpHa4kEYbA4hFBa76HKaLoxhLwArsA56XZMCm/euuuaxxMyghfz8FLokRPRdeL ojWfOT/xdJAmNkd8HJ3vXMVcfQ6lvSwdi8LLJ9QKEJ5WSaIJ8Sm3YFULR9sGyNRT9EwX XEX4sNO3qUBwaXn18obIni6HDSNSaQhxATCSEE/9PY2XxcL0z0kBX1D4ynH5YgvtJFOz fZgVT4XSrlL8CisAkF5g+ffQioVSXxPxIP9Gx6lrTiCA7gjzljjjjfw9DXsDjOhJ9eg6 CseVa5flwc9+WQGaxLb5T9hBmvEc4fhXno86yBghyVdG9sjH6dy9eJ1aWTetO1mSXTS1 ZWlQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@intel.com header.s=Intel header.b=ZDQGjBZd; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=intel.com Received: from out1.vger.email (out1.vger.email. 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Wysocki" Subject: [PATCH v1 2/3] lib/string_helpers: Change returned value of the strreplace() Date: Wed, 22 Mar 2023 16:12:05 +0200 Message-Id: <20230322141206.56347-3-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.40.0.1.gaa8946217a0b In-Reply-To: <20230322141206.56347-1-andriy.shevchenko@linux.intel.com> References: <20230322141206.56347-1-andriy.shevchenko@linux.intel.com> MIME-Version: 1.0 X-Spam-Status: No, score=-2.4 required=5.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_EF,RCVD_IN_DNSWL_MED,SPF_HELO_NONE,SPF_NONE, URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1761077965220152413?= X-GMAIL-MSGID: =?utf-8?q?1761077965220152413?= It's more useful to return the original string with strreplace(), so it may be used like attr->name = strreplace(name, '/', '_'); While at it, amend the kernel documentation. Signed-off-by: Andy Shevchenko --- include/linux/string.h | 2 +- lib/string_helpers.c | 10 +++++++--- 2 files changed, 8 insertions(+), 4 deletions(-) diff --git a/include/linux/string.h b/include/linux/string.h index a7bff7ed3cb0..cb0c24ce0826 100644 --- a/include/linux/string.h +++ b/include/linux/string.h @@ -169,7 +169,7 @@ static inline void memcpy_flushcache(void *dst, const void *src, size_t cnt) #endif void *memchr_inv(const void *s, int c, size_t n); -char *strreplace(char *s, char old, char new); +char *strreplace(char *str, char old, char new); extern void kfree_const(const void *x); diff --git a/lib/string_helpers.c b/lib/string_helpers.c index 230020a2e076..ab7b1577cbcf 100644 --- a/lib/string_helpers.c +++ b/lib/string_helpers.c @@ -979,14 +979,18 @@ EXPORT_SYMBOL(__sysfs_match_string); /** * strreplace - Replace all occurrences of character in string. - * @s: The string to operate on. + * @str: The string to operate on. * @old: The character being replaced. * @new: The character @old is replaced with. * - * Returns pointer to the nul byte at the end of @s. + * Replaces the each @old character with a @new one in the given string @str. + * + * Return: pointer to the original string @str. */ -char *strreplace(char *s, char old, char new) +char *strreplace(char *str, char old, char new) { + char *s = str; + for (; *s; ++s) if (*s == old) *s = new; From patchwork Wed Mar 22 14:12:06 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andy Shevchenko X-Patchwork-Id: 73452 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:604a:0:0:0:0:0 with SMTP id j10csp2368125wrt; Wed, 22 Mar 2023 07:20:54 -0700 (PDT) X-Google-Smtp-Source: AK7set95nwXEnJ7csnwbJaFE3WEBo/j+QMMPrwxoVy1emfGuTYLYdTIWxjA2XgJqSU7TSoMqCiT/ X-Received: by 2002:a17:902:e751:b0:1a1:c98d:179b with SMTP id p17-20020a170902e75100b001a1c98d179bmr3440281plf.60.1679494854279; Wed, 22 Mar 2023 07:20:54 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1679494854; cv=none; d=google.com; s=arc-20160816; b=JcZKCXWphj/MhhJF4NATjcb5rJdgQslf3XhO7Kwa5/KZ/VOeaOYbSH7+dWEPQ+9FYP BbNQoS93dI2fA4EgV+AlIfL1LfRbKCRsuoZyhq09+008Fsbuy6bIBoU6lptfgYcWUdeF HyrXHVlDG+umT/WcTkcxaX8ctzmbgLxis6IyUKSCY17OZyF0sZZ1yj6gkUF3NEJCZ5ua UV+lV3p/Xbeh0CxEffljOwr0ezgP2Qc3pEuy8HT21404HpU4Nn/LhSwYP47OPVb7Qw0a sGbXUhBDNRwMsbERw7G2WjfWuJeUhA8KXism0Q/ecl3eO1V/lLHzkHZGdKjhjl3+0VwR G/UQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=F72P1f8U5LyTlpUM7NW62YLd9QilVR+bzqMPPG77K9w=; b=FND2BeuF/fOVcjdHbirJ7HL2A+covQuJkzZ8spRi96phztEyMnP81VvLKyHH0wXzRO t57JFptwFatYqOrXJC5gySwiQ8+9kcyxTUT3ue42SLHCeZtp6Bstlh2/+NSEg10bMcOg Gi9ecwCW7u3Frj1Y4i1FjCQjfptOhan8OIr5ezSqopAd5X+eB1Ihf7iWmfuewzziDx0q vXCjBQuu6XJ1kuQHIQR8F07qvO0zMs3JO5Xfj1p+XUR4d+fY9HdaRFSoKbskgAOp5moX KP8jxd3g7NjecSflod7w2vduVIK10BWCCa/R0RMAtHA6wbMvBJFVVqYyizt9tltZTIAW xm4Q== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@intel.com header.s=Intel header.b=MXMWHxqP; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=intel.com Received: from out1.vger.email (out1.vger.email. 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Wysocki" Subject: [PATCH v1 3/3] kobject: Use return value of strreplace() Date: Wed, 22 Mar 2023 16:12:06 +0200 Message-Id: <20230322141206.56347-4-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.40.0.1.gaa8946217a0b In-Reply-To: <20230322141206.56347-1-andriy.shevchenko@linux.intel.com> References: <20230322141206.56347-1-andriy.shevchenko@linux.intel.com> MIME-Version: 1.0 X-Spam-Status: No, score=-2.4 required=5.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_EF,RCVD_IN_DNSWL_MED,SPF_HELO_NONE,SPF_NONE, URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1761077996239040993?= X-GMAIL-MSGID: =?utf-8?q?1761077996239040993?= Since strreplace() returns the pointer to the original string, we may use it directly in the code. Signed-off-by: Andy Shevchenko --- lib/kobject.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/lib/kobject.c b/lib/kobject.c index f79a434e1231..16d530f9c174 100644 --- a/lib/kobject.c +++ b/lib/kobject.c @@ -281,8 +281,7 @@ int kobject_set_name_vargs(struct kobject *kobj, const char *fmt, kfree_const(s); if (!t) return -ENOMEM; - strreplace(t, '/', '!'); - s = t; + s = strreplace(t, '/', '!'); } kfree_const(kobj->name); kobj->name = s;