Messages in this thread Patch in this message | | | From | Julia Lawall <> | Subject | [PATCH 4/5] drivers/media/video/atmel-isi.c: eliminate a null pointer dereference | Date | Sat, 29 Oct 2011 01:58:16 +0200 |
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From: Julia Lawall <julia@diku.dk>
The variable isi might be null or might be freed at the point of the call to clk_put. pclk contains the value that isi->pclk is expected to point to.
The semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/)
// <smpl> @r@ expression E, E1; identifier f; statement S1,S2,S3; @@
if (E == NULL) { ... when != if (E == NULL || ...) S1 else S2 when != E = E1 *E->f ... when any return ...; } else S3 // </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
--- drivers/media/video/atmel-isi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/media/video/atmel-isi.c b/drivers/media/video/atmel-isi.c index 774715d..a3dafd6 100644 --- a/drivers/media/video/atmel-isi.c +++ b/drivers/media/video/atmel-isi.c @@ -1026,7 +1026,7 @@ err_alloc_ctx: err_alloc_descriptors: kfree(isi); err_alloc_isi: - clk_put(isi->pclk); + clk_put(pclk); return ret; }
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