* [PATCH] ntfs3: Fix attr_punch_hole() null pointer derenference
@ 2022-08-15 11:07 Alon Zahavi
2022-09-30 15:44 ` Konstantin Komarov
` (2 more replies)
0 siblings, 3 replies; 5+ messages in thread
From: Alon Zahavi @ 2022-08-15 11:07 UTC (permalink / raw)
To: almaz.alexandrovich, ntfs3, linux-kernel; +Cc: Alon Zahavi, Tal Lossos
From: Alon Zahavi <zahavi.alon@gmail.com>
The bug occours due to a misuse of `attr` variable instead of `attr_b`.
`attr` is being initialized as NULL, then being derenfernced
as `attr->res.data_size`.
This bug causes a crash of the ntfs3 driver itself,
If compiled directly to the kernel, it crashes the whole system.
Signed-off-by: Alon Zahavi <zahavi.alon@gmail.com>
Co-developed-by: Tal Lossos <tallossos@gmail.com>
Signed-off-by: Tal Lossos <tallossos@gmail.com>
---
fs/ntfs3/attrib.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/ntfs3/attrib.c b/fs/ntfs3/attrib.c
index e8c00dda42ad..4e74bc8f01ed 100644
--- a/fs/ntfs3/attrib.c
+++ b/fs/ntfs3/attrib.c
@@ -1949,7 +1949,7 @@ int attr_punch_hole(struct ntfs_inode *ni, u64 vbo, u64 bytes, u32 *frame_size)
return -ENOENT;
if (!attr_b->non_res) {
- u32 data_size = le32_to_cpu(attr->res.data_size);
+ u32 data_size = le32_to_cpu(attr_b->res.data_size);
u32 from, to;
if (vbo > data_size)
--
2.25.1
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH] ntfs3: Fix attr_punch_hole() null pointer derenference
2022-08-15 11:07 [PATCH] ntfs3: Fix attr_punch_hole() null pointer derenference Alon Zahavi
@ 2022-09-30 15:44 ` Konstantin Komarov
2023-01-17 20:21 ` SeongJae Park
2023-01-17 20:27 ` SeongJae Park
2 siblings, 0 replies; 5+ messages in thread
From: Konstantin Komarov @ 2022-09-30 15:44 UTC (permalink / raw)
To: Alon Zahavi, ntfs3, linux-kernel; +Cc: Tal Lossos
On 8/15/22 14:07, Alon Zahavi wrote:
> From: Alon Zahavi <zahavi.alon@gmail.com>
>
> The bug occours due to a misuse of `attr` variable instead of `attr_b`.
> `attr` is being initialized as NULL, then being derenfernced
> as `attr->res.data_size`.
>
> This bug causes a crash of the ntfs3 driver itself,
> If compiled directly to the kernel, it crashes the whole system.
>
> Signed-off-by: Alon Zahavi <zahavi.alon@gmail.com>
> Co-developed-by: Tal Lossos <tallossos@gmail.com>
> Signed-off-by: Tal Lossos <tallossos@gmail.com>
> ---
> fs/ntfs3/attrib.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/fs/ntfs3/attrib.c b/fs/ntfs3/attrib.c
> index e8c00dda42ad..4e74bc8f01ed 100644
> --- a/fs/ntfs3/attrib.c
> +++ b/fs/ntfs3/attrib.c
> @@ -1949,7 +1949,7 @@ int attr_punch_hole(struct ntfs_inode *ni, u64 vbo, u64 bytes, u32 *frame_size)
> return -ENOENT;
>
> if (!attr_b->non_res) {
> - u32 data_size = le32_to_cpu(attr->res.data_size);
> + u32 data_size = le32_to_cpu(attr_b->res.data_size);
> u32 from, to;
>
> if (vbo > data_size)
Applied, thanks!
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] ntfs3: Fix attr_punch_hole() null pointer derenference
2022-08-15 11:07 [PATCH] ntfs3: Fix attr_punch_hole() null pointer derenference Alon Zahavi
2022-09-30 15:44 ` Konstantin Komarov
@ 2023-01-17 20:21 ` SeongJae Park
2023-01-22 13:46 ` Greg KH
2023-01-17 20:27 ` SeongJae Park
2 siblings, 1 reply; 5+ messages in thread
From: SeongJae Park @ 2023-01-17 20:21 UTC (permalink / raw)
Cc: Alon Zahavi, almaz.alexandrovich, ntfs3, linux-kernel,
Tal Lossos, stable, gregkh
Hello,
On Mon, 15 Aug 2022 14:07:12 +0300 Alon Zahavi <zahavi.alon@gmail.com> wrote:
> From: Alon Zahavi <zahavi.alon@gmail.com>
>
> The bug occours due to a misuse of `attr` variable instead of `attr_b`.
> `attr` is being initialized as NULL, then being derenfernced
> as `attr->res.data_size`.
>
> This bug causes a crash of the ntfs3 driver itself,
> If compiled directly to the kernel, it crashes the whole system.
>
> Signed-off-by: Alon Zahavi <zahavi.alon@gmail.com>
> Co-developed-by: Tal Lossos <tallossos@gmail.com>
> Signed-off-by: Tal Lossos <tallossos@gmail.com>
This patch has now merged in mainline as
6d5c9e79b726cc473d40e9cb60976dbe8e669624. stable@, could you please merge this
in stable kernels?
Fixes: be71b5cba2e64 ("fs/ntfs3: Add attrib operations") # 5.14
Thanks,
SJ
> ---
> fs/ntfs3/attrib.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/fs/ntfs3/attrib.c b/fs/ntfs3/attrib.c
> index e8c00dda42ad..4e74bc8f01ed 100644
> --- a/fs/ntfs3/attrib.c
> +++ b/fs/ntfs3/attrib.c
> @@ -1949,7 +1949,7 @@ int attr_punch_hole(struct ntfs_inode *ni, u64 vbo, u64 bytes, u32 *frame_size)
> return -ENOENT;
>
> if (!attr_b->non_res) {
> - u32 data_size = le32_to_cpu(attr->res.data_size);
> + u32 data_size = le32_to_cpu(attr_b->res.data_size);
> u32 from, to;
>
> if (vbo > data_size)
> --
> 2.25.1
>
>
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] ntfs3: Fix attr_punch_hole() null pointer derenference
2022-08-15 11:07 [PATCH] ntfs3: Fix attr_punch_hole() null pointer derenference Alon Zahavi
2022-09-30 15:44 ` Konstantin Komarov
2023-01-17 20:21 ` SeongJae Park
@ 2023-01-17 20:27 ` SeongJae Park
2 siblings, 0 replies; 5+ messages in thread
From: SeongJae Park @ 2023-01-17 20:27 UTC (permalink / raw)
Cc: Alon Zahavi, almaz.alexandrovich, ntfs3, linux-kernel,
Tal Lossos, stable, gregkh
Hello,
On Mon, 15 Aug 2022 14:07:12 +0300 Alon Zahavi <zahavi.alon@gmail.com> wrote:
> From: Alon Zahavi <zahavi.alon@gmail.com>
>
> The bug occours due to a misuse of `attr` variable instead of `attr_b`.
> `attr` is being initialized as NULL, then being derenfernced
> as `attr->res.data_size`.
>
> This bug causes a crash of the ntfs3 driver itself,
> If compiled directly to the kernel, it crashes the whole system.
>
> Signed-off-by: Alon Zahavi <zahavi.alon@gmail.com>
> Co-developed-by: Tal Lossos <tallossos@gmail.com>
> Signed-off-by: Tal Lossos <tallossos@gmail.com>
This patch has now merged in mainline as
6d5c9e79b726cc473d40e9cb60976dbe8e669624. stable@, could you please merge this
in stable kernels?
Fixes: be71b5cba2e64 ("fs/ntfs3: Add attrib operations") # 5.14
Thanks,
SJ
> ---
> fs/ntfs3/attrib.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/fs/ntfs3/attrib.c b/fs/ntfs3/attrib.c
> index e8c00dda42ad..4e74bc8f01ed 100644
> --- a/fs/ntfs3/attrib.c
> +++ b/fs/ntfs3/attrib.c
> @@ -1949,7 +1949,7 @@ int attr_punch_hole(struct ntfs_inode *ni, u64 vbo, u64 bytes, u32 *frame_size)
> return -ENOENT;
>
> if (!attr_b->non_res) {
> - u32 data_size = le32_to_cpu(attr->res.data_size);
> + u32 data_size = le32_to_cpu(attr_b->res.data_size);
> u32 from, to;
>
> if (vbo > data_size)
> --
> 2.25.1
>
>
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] ntfs3: Fix attr_punch_hole() null pointer derenference
2023-01-17 20:21 ` SeongJae Park
@ 2023-01-22 13:46 ` Greg KH
0 siblings, 0 replies; 5+ messages in thread
From: Greg KH @ 2023-01-22 13:46 UTC (permalink / raw)
To: SeongJae Park
Cc: Alon Zahavi, almaz.alexandrovich, ntfs3, linux-kernel,
Tal Lossos, stable
On Tue, Jan 17, 2023 at 08:21:36PM +0000, SeongJae Park wrote:
> Hello,
>
> On Mon, 15 Aug 2022 14:07:12 +0300 Alon Zahavi <zahavi.alon@gmail.com> wrote:
>
> > From: Alon Zahavi <zahavi.alon@gmail.com>
> >
> > The bug occours due to a misuse of `attr` variable instead of `attr_b`.
> > `attr` is being initialized as NULL, then being derenfernced
> > as `attr->res.data_size`.
> >
> > This bug causes a crash of the ntfs3 driver itself,
> > If compiled directly to the kernel, it crashes the whole system.
> >
> > Signed-off-by: Alon Zahavi <zahavi.alon@gmail.com>
> > Co-developed-by: Tal Lossos <tallossos@gmail.com>
> > Signed-off-by: Tal Lossos <tallossos@gmail.com>
>
> This patch has now merged in mainline as
> 6d5c9e79b726cc473d40e9cb60976dbe8e669624. stable@, could you please merge this
> in stable kernels?
>
> Fixes: be71b5cba2e64 ("fs/ntfs3: Add attrib operations") # 5.14
>
Now queued up, thanks.
greg k-h
^ permalink raw reply [flat|nested] 5+ messages in thread
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2022-08-15 11:07 [PATCH] ntfs3: Fix attr_punch_hole() null pointer derenference Alon Zahavi
2022-09-30 15:44 ` Konstantin Komarov
2023-01-17 20:21 ` SeongJae Park
2023-01-22 13:46 ` Greg KH
2023-01-17 20:27 ` SeongJae Park
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