TWxSoftware/twx-linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

udmabuf: also check for F_SEAL_FUTURE_WRITE

Browse Source 
commit 0a16e24e34 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: ab3948f58f ("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>
This commit is contained in:
Jann Horn
2024-12-04 17:26:20 +01:00
committed by Greg Kroah-Hartman
parent ef942d2336
commit 4fa2c639fc
1 changed files with 1 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/dma-buf/udmabuf.c
+1 -1
View File
@@ -164,7 +164,7 @@ 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,