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GET /api/patches/2194181/?format=api
HTTP 200 OK
Allow: GET, PUT, PATCH, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "id": 2194181,
    "url": "http://patchwork.ozlabs.org/api/patches/2194181/?format=api",
    "web_url": "http://patchwork.ozlabs.org/project/linux-ext4/patch/20260207010617.216675-1-nikic.milos@gmail.com/",
    "project": {
        "id": 8,
        "url": "http://patchwork.ozlabs.org/api/projects/8/?format=api",
        "name": "Linux ext4 filesystem development",
        "link_name": "linux-ext4",
        "list_id": "linux-ext4.vger.kernel.org",
        "list_email": "linux-ext4@vger.kernel.org",
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        "list_archive_url_format": "",
        "commit_url_format": ""
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    "msgid": "<20260207010617.216675-1-nikic.milos@gmail.com>",
    "list_archive_url": null,
    "date": "2026-02-07T01:06:17",
    "name": "ext2: replace BUG_ON with WARN_ON_ONCE in ext2_get_blocks",
    "commit_ref": null,
    "pull_url": null,
    "state": "new",
    "archived": false,
    "hash": "f3d1b39ae993a6d81cfdbf157494f0c65e38b217",
    "submitter": {
        "id": 92599,
        "url": "http://patchwork.ozlabs.org/api/people/92599/?format=api",
        "name": "Milos Nikic",
        "email": "nikic.milos@gmail.com"
    },
    "delegate": null,
    "mbox": "http://patchwork.ozlabs.org/project/linux-ext4/patch/20260207010617.216675-1-nikic.milos@gmail.com/mbox/",
    "series": [
        {
            "id": 491356,
            "url": "http://patchwork.ozlabs.org/api/series/491356/?format=api",
            "web_url": "http://patchwork.ozlabs.org/project/linux-ext4/list/?series=491356",
            "date": "2026-02-07T01:06:17",
            "name": "ext2: replace BUG_ON with WARN_ON_ONCE in ext2_get_blocks",
            "version": 1,
            "mbox": "http://patchwork.ozlabs.org/series/491356/mbox/"
        }
    ],
    "comments": "http://patchwork.ozlabs.org/api/patches/2194181/comments/",
    "check": "pending",
    "checks": "http://patchwork.ozlabs.org/api/patches/2194181/checks/",
    "tags": {},
    "related": [],
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        "X-Received": "by 2002:a05:7022:250e:b0:11a:2f10:fa46 with SMTP id\n a92af1059eb24-12703e569femr2185435c88.0.1770426380622;\n        Fri, 06 Feb 2026 17:06:20 -0800 (PST)",
        "From": "Milos Nikic <nikic.milos@gmail.com>",
        "To": "jack@suse.com",
        "Cc": "linux-ext4@vger.kernel.org,\n\tlinux-kernel@vger.kernel.org,\n\tMilos Nikic <nikic.milos@gmail.com>",
        "Subject": "[PATCH] ext2: replace BUG_ON with WARN_ON_ONCE in ext2_get_blocks",
        "Date": "Fri,  6 Feb 2026 17:06:17 -0800",
        "Message-ID": "<20260207010617.216675-1-nikic.milos@gmail.com>",
        "X-Mailer": "git-send-email 2.52.0",
        "Precedence": "bulk",
        "X-Mailing-List": "linux-ext4@vger.kernel.org",
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        "X-Spam-Checker-Version": "SpamAssassin 4.0.1 (2024-03-25) on gandalf.ozlabs.org"
    },
    "content": "If ext2_get_blocks() is called with maxblocks == 0, it currently triggers\na BUG_ON(), causing a kernel panic.\n\nWhile this condition implies a logic error in the caller, a filesystem\nshould not crash the system due to invalid arguments.\n\nReplace the BUG_ON() with a WARN_ON_ONCE() to provide a stack trace for\ndebugging, and return -EINVAL to handle the error gracefully.\n\nSigned-off-by: Milos Nikic <nikic.milos@gmail.com>\n---\n fs/ext2/inode.c | 3 ++-\n 1 file changed, 2 insertions(+), 1 deletion(-)",
    "diff": "diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c\nindex dbfe9098a124..18bf1a91dbc2 100644\n--- a/fs/ext2/inode.c\n+++ b/fs/ext2/inode.c\n@@ -638,7 +638,8 @@ static int ext2_get_blocks(struct inode *inode,\n \tint count = 0;\n \text2_fsblk_t first_block = 0;\n \n-\tBUG_ON(maxblocks == 0);\n+\tif (WARN_ON_ONCE(maxblocks == 0))\n+\t\treturn -EINVAL;\n \n \tdepth = ext2_block_to_path(inode,iblock,offsets,&blocks_to_boundary);\n \n",
    "prefixes": []
}