diff options
| author | Lizhi Xu <lizhi.xu@windriver.com> | 2025-10-09 10:37:33 +0800 |
|---|---|---|
| committer | Konstantin Komarov <almaz.alexandrovich@paragon-software.com> | 2025-11-10 14:30:16 +0100 |
| commit | c3856bb499eae0cd5773b609ee9aa8a0e6e42b6c (patch) | |
| tree | b5edd3c47a0c9b495b8a074699d90881bf7fb0ae | |
| parent | 5f33da04e6ceee849e76e6592cc283c72fef7af9 (diff) | |
ntfs3: avoid memcpy size warning
There are more entries after the structure, use unsafe_memcpy() to avoid
this warning.
syzbot reported:
memcpy: detected field-spanning write (size 3656) of single field "hdr1" at fs/ntfs3/index.c:1927 (size 16)
Call Trace:
indx_insert_entry+0x1a0/0x460 fs/ntfs3/index.c:1996
ni_add_name+0x4dd/0x820 fs/ntfs3/frecord.c:2995
ni_rename+0x98/0x170 fs/ntfs3/frecord.c:3026
ntfs_rename+0xab9/0xf00 fs/ntfs3/namei.c:332
Reported-by: syzbot+3a1878433bc1cb97b42a@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=3a1878433bc1cb97b42a
Signed-off-by: Lizhi Xu <lizhi.xu@windriver.com>
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
| -rw-r--r-- | fs/ntfs3/index.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/ntfs3/index.c b/fs/ntfs3/index.c index 6d1bf890929d..7157cfd70fdc 100644 --- a/fs/ntfs3/index.c +++ b/fs/ntfs3/index.c @@ -1924,7 +1924,8 @@ indx_insert_into_buffer(struct ntfs_index *indx, struct ntfs_inode *ni, * Undo critical operations. */ indx_mark_free(indx, ni, new_vbn >> indx->idx2vbn_bits); - memcpy(hdr1, hdr1_saved, used1); + unsafe_memcpy(hdr1, hdr1_saved, used1, + "There are entries after the structure"); indx_write(indx, ni, n1, 0); } |