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GET /api/patches/2227585/?format=api
{ "id": 2227585, "url": "http://patchwork.ozlabs.org/api/patches/2227585/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-aspeed/patch/20260423192045.5729-1-root@LAPTOP-97G9G880.localdomain/", "project": { "id": 57, "url": "http://patchwork.ozlabs.org/api/projects/57/?format=api", "name": "Linux ASPEED SoC development", "link_name": "linux-aspeed", "list_id": "linux-aspeed.lists.ozlabs.org", "list_email": "linux-aspeed@lists.ozlabs.org", "web_url": "", "scm_url": "", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260423192045.5729-1-root@LAPTOP-97G9G880.localdomain>", "list_archive_url": null, "date": "2026-04-23T19:20:45", "name": "soc: aspeed: lpc-snoop: Fix usercopy overflow in snoop_file_read", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "77ffdc76cd2dc2ac67c51be2b8b103b070630d58", "submitter": { "id": 93244, "url": "http://patchwork.ozlabs.org/api/people/93244/?format=api", "name": "root", "email": "karthiproffesional@gmail.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-aspeed/patch/20260423192045.5729-1-root@LAPTOP-97G9G880.localdomain/mbox/", "series": [ { "id": 501271, "url": "http://patchwork.ozlabs.org/api/series/501271/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-aspeed/list/?series=501271", "date": "2026-04-23T19:20:45", "name": "soc: aspeed: lpc-snoop: Fix usercopy overflow in snoop_file_read", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/501271/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2227585/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2227585/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linux-aspeed+bounces-3953-incoming=patchwork.ozlabs.org@lists.ozlabs.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linux-aspeed@lists.ozlabs.org" ], "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256\n header.s=20251104 header.b=CJ5mWRUT;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org\n (client-ip=2404:9400:21b9:f100::1; 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The kfifo backing buffer is\n2048 bytes (SNOOP_FIFO_SIZE), allocated from kmalloc-2k slab.\nA read larger than 2048 bytes triggers a BUG under\nCONFIG_HARDENED_USERCOPY:\n\n kernel BUG at mm/usercopy.c:99!\n\nReproducer:\n hexdump /dev/aspeed-lpc-snoop0\n\nFix by clamping count to SNOOP_FIFO_SIZE before the copy.\n\nFixes: 3772e5da4454 (\"drivers/misc: Aspeed LPC snoop output using misc chardev\")\nCc: stable@vger.kernel.org\nSigned-off-by: Karthikeyan KS <karthiproffesional@gmail.com>\n---\n drivers/soc/aspeed/aspeed-lpc-snoop.c | 1 +\n 1 file changed, 1 insertion(+)", "diff": "diff --git a/drivers/soc/aspeed/aspeed-lpc-snoop.c b/drivers/soc/aspeed/aspeed-lpc-snoop.c\nindex b03310c0830d..5b59e826cc68 100644\n--- a/drivers/soc/aspeed/aspeed-lpc-snoop.c\n+++ b/drivers/soc/aspeed/aspeed-lpc-snoop.c\n@@ -125,6 +125,7 @@ static ssize_t snoop_file_read(struct file *file, char __user *buffer,\n if (ret == -ERESTARTSYS)\n return -EINTR;\n }\n+ count = min(count, (size_t)SNOOP_FIFO_SIZE);\n ret = kfifo_to_user(&chan->fifo, buffer, count, &copied);\n if (ret)\n return ret;\n", "prefixes": [] }