Hi Christophe
On Mon, Apr 27, 2020 at 11:19:45AM +0200, Christophe JAILLET wrote:
Some memory is vmalloc'ed in the 'suspend' function and freed in the
'resume' function.
However, it is also freed in the remove function.
In order to avoid a potential double free, set the corresponding pointer
to NULL once freed in the 'resume' function.
The changelog talks about a suspend and a resume function.
But the code has a w100fb_save_vidmem() and a w100fb_restore_vidmem()
functions.
Fixes: aac51f09d96a ("[PATCH] w100fb: Rewrite for platform independence")
This "Fixes" should be followed by:
Cc: Richard Purdie <redacted>
Cc: Antonino Daplas <redacted>
Cc: Bartlomiej Zolnierkiewicz <redacted>
Cc: <redacted> # v2.6.14+
This is the output of "dim fixes" - that does some magic to provide
the above list.
I filtered a few candidates out that should not be there.
Please fix both issues and resend.
Thanks,
Sam
quoted hunk ↗ jump to hunk
Signed-off-by: Christophe JAILLET <redacted>
---
drivers/video/fbdev/w100fb.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/video/fbdev/w100fb.c b/drivers/video/fbdev/w100fb.c
index 2d6e2738b792..d96ab28f8ce4 100644
--- a/drivers/video/fbdev/w100fb.c
+++ b/drivers/video/fbdev/w100fb.c
@@ -588,6 +588,7 @@ static void w100fb_restore_vidmem(struct w100fb_par *par)
memsize=par->mach->mem->size;
memcpy_toio(remapped_fbuf + (W100_FB_BASE-MEM_WINDOW_BASE), par->saved_extmem, memsize);
vfree(par->saved_extmem);
+ par->saved_extmem = NULL;
}
if (par->saved_intmem) {
memsize=MEM_INT_SIZE;@@ -596,6 +597,7 @@ static void w100fb_restore_vidmem(struct w100fb_par *par)
else
memcpy_toio(remapped_fbuf + (W100_FB_BASE-MEM_WINDOW_BASE), par->saved_intmem, memsize);
vfree(par->saved_intmem);
+ par->saved_intmem = NULL;
}
}
--
2.25.1
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel