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snd_miro_probe is a static function that is only called twice in the file that defines it. At each call site, its argument is freed using snd_card_free. Thus, there is no need for snd_miro_probe to call snd_card_free on its argument on any of its error exit paths. Because snd_card_free both reads the fields of its argument and kfrees its argments, the results of the second snd_card_free should be unpredictable. A simplified version of the semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @r@ identifier f,free,a; parameter list[n] ps; type T; expression e; @@ f(ps,T a,...) { ... when any when != a = e if(...) { ... free(a); ... return ...; } ... when any } @@ identifier r.f,r.free; expression x,a; expression list[r.n] xs; @@ * x = f(xs,a,...); if (...) { ... free(a); ... return ...; } // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Takashi Iwai <tiwai@suse.de> |
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| ad1816a | ||
| ad1848 | ||
| cs423x | ||
| es1688 | ||
| galaxy | ||
| gus | ||
| msnd | ||
| opti9xx | ||
| sb | ||
| wavefront | ||
| wss | ||
| adlib.c | ||
| als100.c | ||
| azt2320.c | ||
| cmi8328.c | ||
| cmi8330.c | ||
| es18xx.c | ||
| Kconfig | ||
| Makefile | ||
| opl3sa2.c | ||
| sc6000.c | ||
| sscape.c | ||