Commit 17331d0f authored by Christian König's avatar Christian König Committed by Christian König
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dma-buf/sw-sync: always taint the kernel when sw-sync is used 



The SW-sync functionality should only be used for testing and debugging
since it is inherently unsave.

Signed-off-by: default avatarChristian König <christian.koenig@amd.com>
Acked-by: default avatarSumit Semwal <sumit.semwal@linaro.org>
Link: https://lore.kernel.org/r/20251120150018.27385-3-christian.koenig@amd.com
parent 0a8bc1d0

drivers/dma-buf/sw_sync.c

+4 −0
Original line number Diff line number Diff line
@@ -8,6 +8,7 @@ 
#include <linux/file.h>

#include <linux/fs.h>

#include <linux/uaccess.h>

#include <linux/panic.h>

#include <linux/slab.h>

#include <linux/sync_file.h>
@@ -349,6 +350,9 @@ static long sw_sync_ioctl_create_fence(struct sync_timeline *obj, 
	struct sync_file *sync_file;

	struct sw_sync_create_fence_data data;



	/* SW sync fence are inherently unsafe and can deadlock the kernel */

	add_taint(TAINT_SOFTLOCKUP, LOCKDEP_STILL_OK);



	if (fd < 0)

		return fd;