The patch titled Subject: ocfs2: pass u64 to ocfs2_truncate_inline maybe overflow has been added to the -mm mm-hotfixes-unstable branch. Its filename is ocfs2-pass-u64-to-ocfs2_truncate_inline-maybe-overflow.patch

This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches...

This patch will later appear in the mm-hotfixes-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------ From: Edward Adam Davis eadavis@qq.com Subject: ocfs2: pass u64 to ocfs2_truncate_inline maybe overflow Date: Wed, 16 Oct 2024 19:43:47 +0800

Syzbot reported a kernel BUG in ocfs2_truncate_inline. There are two reasons for this: first, the parameter value passed is greater than ocfs2_max_inline_data_with_xattr, second, the start and end parameters of ocfs2_truncate_inline are "unsigned int".

So, we need to add a sanity check for byte_start and byte_len right before ocfs2_truncate_inline() in ocfs2_remove_inode_range(), if they are greater than ocfs2_max_inline_data_with_xattr return -EINVAL.

Link: https://lkml.kernel.org/r/tencent_D48DB5122ADDAEDDD11918CFB68D93258C07@qq.co... Fixes: 1afc32b95233 ("ocfs2: Write support for inline data") Signed-off-by: Edward Adam Davis eadavis@qq.com Reported-by: syzbot+81092778aac03460d6b7@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=81092778aac03460d6b7 Reviewed-by: Joseph Qi joseph.qi@linux.alibaba.com Cc: Joel Becker jlbec@evilplan.org Cc: Joseph Qi joseph.qi@linux.alibaba.com Cc: Mark Fasheh mark@fasheh.com Cc: Junxiao Bi junxiao.bi@oracle.com Cc: Changwei Ge gechangwei@live.cn Cc: Gang He ghe@suse.com Cc: Jun Piao piaojun@huawei.com Cc: stable@vger.kernel.org Signed-off-by: Andrew Morton akpm@linux-foundation.org ---

fs/ocfs2/file.c | 8 ++++++++ 1 file changed, 8 insertions(+)

--- a/fs/ocfs2/file.c~ocfs2-pass-u64-to-ocfs2_truncate_inline-maybe-overflow +++ a/fs/ocfs2/file.c @@ -1784,6 +1784,14 @@ int ocfs2_remove_inode_range(struct inod return 0;

if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { + int id_count = ocfs2_max_inline_data_with_xattr(inode->i_sb, di); + + if (byte_start > id_count || byte_start + byte_len > id_count) { + ret = -EINVAL; + mlog_errno(ret); + goto out; + } + ret = ocfs2_truncate_inline(inode, di_bh, byte_start, byte_start + byte_len, 0); if (ret) { _

Patches currently in -mm which might be from eadavis@qq.com are

ocfs2-pass-u64-to-ocfs2_truncate_inline-maybe-overflow.patch