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| author | Jann Horn <jannh@google.com> | 2024-12-04 17:26:20 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-12-27 13:58:56 +0100 |
| commit | 50c960e79921196b6ebe746f62b30fe9bd9ab69a (patch) | |
| tree | 8c0cda7f86d61e7aa15e1fa2d39227b1896b499c /drivers/dma-buf | |
| parent | 284760b320a0bac411b18108316939707dccb12b (diff) | |
| download | linux-50c960e79921196b6ebe746f62b30fe9bd9ab69a.tar.gz linux-50c960e79921196b6ebe746f62b30fe9bd9ab69a.tar.bz2 linux-50c960e79921196b6ebe746f62b30fe9bd9ab69a.zip | |
udmabuf: also check for F_SEAL_FUTURE_WRITE
commit 0a16e24e34f28210f68195259456c73462518597 upstream.
When F_SEAL_FUTURE_WRITE was introduced, it was overlooked that udmabuf
must reject memfds with this flag, just like ones with F_SEAL_WRITE.
Fix it by adding F_SEAL_FUTURE_WRITE to SEALS_DENIED.
Fixes: ab3948f58ff8 ("mm/memfd: add an F_SEAL_FUTURE_WRITE seal to memfd")
Cc: stable@vger.kernel.org
Acked-by: Vivek Kasireddy <vivek.kasireddy@intel.com>
Signed-off-by: Jann Horn <jannh@google.com>
Reviewed-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Signed-off-by: Vivek Kasireddy <vivek.kasireddy@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241204-udmabuf-fixes-v2-2-23887289de1c@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/dma-buf')
| -rw-r--r-- | drivers/dma-buf/udmabuf.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/dma-buf/udmabuf.c b/drivers/dma-buf/udmabuf.c index 820c993c8659..d1fcdd1f9aae 100644 --- a/drivers/dma-buf/udmabuf.c +++ b/drivers/dma-buf/udmabuf.c @@ -194,7 +194,7 @@ static const struct dma_buf_ops udmabuf_ops = { }; #define SEALS_WANTED (F_SEAL_SHRINK) -#define SEALS_DENIED (F_SEAL_WRITE) +#define SEALS_DENIED (F_SEAL_WRITE|F_SEAL_FUTURE_WRITE) static long udmabuf_create(struct miscdevice *device, struct udmabuf_create_list *head, |