6.12-stable review patch. If anyone has any objections, please let me know.
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From: Andrey Vatoropin a.vatoropin@crpt.ru
[ Upstream commit af5cab0e5b6f8edb0be51a9f47f3f620e0b4fd70 ]
The hdr_first_de() function returns a pointer to a struct NTFS_DE. This pointer may be NULL. To handle the NULL error effectively, it is important to implement an error handler. This will help manage potential errors consistently.
Additionally, error handling for the return value already exists at other points where this function is called.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Fixes: 82cae269cfa9 ("fs/ntfs3: Add initialization of super block") Signed-off-by: Andrey Vatoropin a.vatoropin@crpt.ru Signed-off-by: Konstantin Komarov almaz.alexandrovich@paragon-software.com Signed-off-by: Sasha Levin sashal@kernel.org --- fs/ntfs3/index.c | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/fs/ntfs3/index.c b/fs/ntfs3/index.c index 78d20e4baa2c9..1bf2a6593dec6 100644 --- a/fs/ntfs3/index.c +++ b/fs/ntfs3/index.c @@ -2182,6 +2182,10 @@ static int indx_get_entry_to_replace(struct ntfs_index *indx,
e = hdr_first_de(&n->index->ihdr); fnd_push(fnd, n, e); + if (!e) { + err = -EINVAL; + goto out; + }
if (!de_is_last(e)) { /* @@ -2203,6 +2207,10 @@ static int indx_get_entry_to_replace(struct ntfs_index *indx,
n = fnd->nodes[level]; te = hdr_first_de(&n->index->ihdr); + if (!te) { + err = -EINVAL; + goto out; + } /* Copy the candidate entry into the replacement entry buffer. */ re = kmalloc(le16_to_cpu(te->size) + sizeof(u64), GFP_NOFS); if (!re) {