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Mon, 01 Dec 2025 01:17:32 -0800 (PST) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: yao xiao Date: Mon, 1 Dec 2025 17:17:20 +0800 X-Gm-Features: AWmQ_blDBYGbzf0XU5S93uV2a6bMmmKE8qZMjNoGyXS8deKYtj0PO8rs4ql7lhM Message-ID: Subject: [PATCH v2] f2fs: add overflow/underflow checks to update_sit_entry To: jaegeuk@kernel.org, chao@kernel.org Cc: linux-f2fs-devel@lists.sourceforge.net, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Content-Type: multipart/mixed; boundary="000000000000f317660644e07243" Content-Transfer-Encoding: quoted-printable --000000000000f317660644e07243 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 RnJvbTogWWFvIFhpYW8gPHhpYW5neWFvZjRmcmVlQGdtYWlsLmNvbT4KVG86IEphZWdldWsgS2lt IDxqYWVnZXVrQGtlcm5lbC5vcmc+LCBDaGFvIFl1IDxjaGFvQGtlcm5lbC5vcmc+CkNjOiBsaW51 eC1mMmZzLWRldmVsQGxpc3RzLnNvdXJjZWZvcmdlLm5ldCwKICAgIGxpbnV4LWZzZGV2ZWxAdmdl ci5rZXJuZWwub3JnLAogICAgbGludXgta2VybmVsQHZnZXIua2VybmVsLm9yZwpTdWJqZWN0OiBb UEFUQ0ggdjJdIGYyZnM6IGFkZCBvdmVyZmxvdy91bmRlcmZsb3cgY2hlY2tzIHRvIHVwZGF0ZV9z aXRfZW50cnkKClRoZSB1cGRhdGVfc2l0X2VudHJ5KCkgZnVuY3Rpb24gcGVyZm9ybXMgYW4gYXJp dGhtZXRpYyBvcGVyYXRpb24gYmV0d2VlbgpzZS0+dmFsaWRfYmxvY2tzIChhIDEwLWJpdCB1bnNp Z25lZCBiaXRmaWVsZCkgYW5kIGEgc2lnbmVkIGludGVnZXIgJ2RlbCcuClVuZGVyIEMgaW50ZWdl ciBwcm9tb3Rpb24gcnVsZXMsIHRoZSBzaWduZWQgaW50ZWdlciBpcyBjb252ZXJ0ZWQgdG8gdW5z aWduZWQKYmVmb3JlIHRoZSBhZGRpdGlvbiwgd2hpY2ggY2FuIGxlYWQgdG8gd3JhcGFyb3VuZCBi ZWhhdmlvcjoKCiAgLSBJZiAnZGVsJyBpcyBuZWdhdGl2ZSBhbmQgbGFyZ2UsIGl0IGJlY29tZXMg YSBsYXJnZSB1bnNpZ25lZCBpbnRlZ2VyLAogICAgcmVzdWx0aW5nIGluIGFuIHVuaW50ZW5kZWQg aHVnZSBwb3NpdGl2ZSBhZGRpdGlvbi4KICAtIElmICdkZWwnIGlzIHBvc2l0aXZlIGFuZCBsYXJn ZSwgdGhlIHJlc3VsdCBjYW4gZXhjZWVkIHRoZSBiaXRmaWVsZCdzCiAgICBtYXhpbXVtIHJlcHJl c2VudGFibGUgcmFuZ2UuCgpUbyBhdm9pZCB1bmRlZmluZWQgYmVoYXZpb3IgY2F1c2VkIGJ5IHBl cmZvcm1pbmcgdGhlIGFyaXRobWV0aWMgZmlyc3QgYW5kCnZhbGlkYXRpbmcgdGhlIHJlc3VsdCBh ZnRlcndhcmRzLCB0aGlzIHBhdGNoIGFkZHMgZXhwbGljaXQgb3ZlcmZsb3cvdW5kZXJmbD0Kb3cK Y2hlY2tzIGJlZm9yZSBjb21wdXRpbmcgdGhlIG5ldyB2YWx1ZS4gVGhpcyBlbnN1cmVzIHRoZSBv cGVyYXRpb24gaXMgc2FmZQphbmQgcHJldmVudHMgaW5jb25zaXN0ZW50IFNJVCBtZXRhZGF0YSB1 cGRhdGVzLgoKVGhpcyBjaGFuZ2UgZm9sbG93cyB0aGUgZGVmZW5zaXZlIG92ZXJmbG93IGNoZWNr IHN0eWxlIHVzZWQgaW4gcHJldmlvdXMKZjJmcyBmaXhlcyBhZGRyZXNzaW5nIHNpbWlsYXIgYm91 bmRhcnkgaXNzdWVzLgoKU2lnbmVkLW9mZi1ieTogWWFvIFhpYW8gPHhpYW5neWFvZjRmcmVlQGdt YWlsLmNvbT4KLS0tCiBmcy9mMmZzL3NlZ21lbnQuYyB8IDI4ICsrKysrKysrKysrKysrKysrKysr KysrLS0tLS0KIDEgZmlsZSBjaGFuZ2VkLCAyMyBpbnNlcnRpb25zKCspLCA1IGRlbGV0aW9ucygt KQoKZGlmZiAtLWdpdCBhL2ZzL2YyZnMvc2VnbWVudC5jIGIvZnMvZjJmcy9zZWdtZW50LmMKaW5k ZXggYjQ1ZWFjZTg3OWQ3Li4wNWFiMzQ2MDBlMzIgMTAwNjQ0Ci0tLSBhL2ZzL2YyZnMvc2VnbWVu dC5jCisrKyBiL2ZzL2YyZnMvc2VnbWVudC5jCkBAIC0yNTY5LDEzICsyNTY5LDMzIEBAIHN0YXRp YyB2b2lkIHVwZGF0ZV9zaXRfZW50cnkoc3RydWN0CmYyZnNfc2JfaW5mbyAqc2JpLCBibG9ja190 IGJsa2FkZHIsIGludCBkZWwpCiAgc3RydWN0IHNlZ19lbnRyeSAqc2U7CiAgdW5zaWduZWQgaW50 IHNlZ25vLCBvZmZzZXQ7CiAgbG9uZyBpbnQgbmV3X3ZibG9ja3M7CisgdW5zaWduZWQgaW50IG1h eF92YWxpZDsKCiAgc2Vnbm8gPTNEIEdFVF9TRUdOTyhzYmksIGJsa2FkZHIpOwogIGlmIChzZWdu byA9M0Q9M0QgTlVMTF9TRUdOTykKICByZXR1cm47CgogIHNlID0zRCBnZXRfc2VnX2VudHJ5KHNi aSwgc2Vnbm8pOwotIG5ld192YmxvY2tzID0zRCBzZS0+dmFsaWRfYmxvY2tzICsgZGVsOworIG1h eF92YWxpZCA9M0QgZjJmc191c2FibGVfYmxrc19pbl9zZWcoc2JpLCBzZWdubyk7CisKKyAvKiBQ cmV2ZW50IG92ZXJmbG93L3VuZGVyZmxvdyBiZWZvcmUgcGVyZm9ybWluZyBhcml0aG1ldGljLiAq LworIGlmIChkZWwgPiAwKSB7CisgaWYgKCh1bnNpZ25lZCBpbnQpZGVsID4gbWF4X3ZhbGlkIHx8 CisgICAgc2UtPnZhbGlkX2Jsb2NrcyA+IG1heF92YWxpZCAtICh1bnNpZ25lZCBpbnQpZGVsKSB7 CisgZjJmc19idWdfb24oc2JpLCAxKTsKKyByZXR1cm47CisgfQorIH0gZWxzZSBpZiAoZGVsIDwg MCkgeworIGlmIChzZS0+dmFsaWRfYmxvY2tzIDwgKHVuc2lnbmVkIGludCkoLWRlbCkpIHsKKyBm MmZzX2J1Z19vbihzYmksIDEpOworIHJldHVybjsKKyB9CisgfQorCisgbmV3X3ZibG9ja3MgPTNE IChsb25nIGludClzZS0+dmFsaWRfYmxvY2tzICsgZGVsOwogIG9mZnNldCA9M0QgR0VUX0JMS09G Rl9GUk9NX1NFRzAoc2JpLCBibGthZGRyKTsKCiAgZjJmc19idWdfb24oc2JpLCAobmV3X3ZibG9j a3MgPCAwIHx8Ci0tPTIwCjIuMzQuMQ== --000000000000f317660644e07243 Content-Type: application/octet-stream; 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