diff options
Diffstat (limited to '')
-rw-r--r-- | debian/patches/0089-fs-f2fs-Do-not-copy-file-names-that-are-too-long.patch | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/debian/patches/0089-fs-f2fs-Do-not-copy-file-names-that-are-too-long.patch b/debian/patches/0089-fs-f2fs-Do-not-copy-file-names-that-are-too-long.patch new file mode 100644 index 0000000..cf71b38 --- /dev/null +++ b/debian/patches/0089-fs-f2fs-Do-not-copy-file-names-that-are-too-long.patch @@ -0,0 +1,37 @@ +From 998bd74c11c0e00f69fe2f37a8200381faf51061 Mon Sep 17 00:00:00 2001 +From: Sudhakar Kuppusamy <sudhakar@linux.ibm.com> +Date: Wed, 6 Apr 2022 18:17:43 +0530 +Subject: fs/f2fs: Do not copy file names that are too long + +A corrupt f2fs file system might specify a name length which is greater +than the maximum name length supported by the GRUB f2fs driver. + +We will allocate enough memory to store the overly long name, but there +are only F2FS_NAME_LEN bytes in the source, so we would read past the end +of the source. + +While checking directory entries, do not copy a file name with an invalid +length. + +Signed-off-by: Sudhakar Kuppusamy <sudhakar@linux.ibm.com> +Signed-off-by: Daniel Axtens <dja@axtens.net> +Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com> +--- + grub-core/fs/f2fs.c | 4 ++++ + 1 file changed, 4 insertions(+) + +diff --git a/grub-core/fs/f2fs.c b/grub-core/fs/f2fs.c +index 8898b235e..df6beb544 100644 +--- a/grub-core/fs/f2fs.c ++++ b/grub-core/fs/f2fs.c +@@ -1003,6 +1003,10 @@ grub_f2fs_check_dentries (struct grub_f2fs_dir_iter_ctx *ctx) + + ftype = ctx->dentry[i].file_type; + name_len = grub_le_to_cpu16 (ctx->dentry[i].name_len); ++ ++ if (name_len >= F2FS_NAME_LEN) ++ return 0; ++ + filename = grub_malloc (name_len + 1); + if (!filename) + return 0; |