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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 14:02:18 +0100 |
| commit | 185edda7d773bc6844af5b49bafd68bea1844e04 (patch) | |
| tree | fa22aaadf4b345616617e7dc24d267908ef3baae | |
| parent | 93f08e5c393fa648a2e3e7ad2d37dd6a16cd726d (diff) | |
| download | linux-185edda7d773bc6844af5b49bafd68bea1844e04.tar.gz linux-185edda7d773bc6844af5b49bafd68bea1844e04.tar.bz2 linux-185edda7d773bc6844af5b49bafd68bea1844e04.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>
| -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 c2e227762152..5e836e4e5b44 100644 --- a/drivers/dma-buf/udmabuf.c +++ b/drivers/dma-buf/udmabuf.c @@ -256,7 +256,7 @@ 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 int check_memfd_seals(struct file *memfd) { |