clk: renesas: cpg-mssr: Fix use after free if cpg_mssr_common_init() failed
authorAlexey Khoroshilov <khoroshilov@ispras.ru>
Fri, 23 Dec 2022 14:40:17 +0000 (17:40 +0300)
committerGeert Uytterhoeven <geert+renesas@glider.be>
Thu, 12 Jan 2023 16:18:48 +0000 (17:18 +0100)
commitfbfd614aeaa2853c2c575299dfe2458db8eff67e
tree1ef019cb46ddecc57af618c973614870d93e1691
parenta278d0c92be9d90307114b05c3edb1e7354d8412
clk: renesas: cpg-mssr: Fix use after free if cpg_mssr_common_init() failed

If cpg_mssr_common_init() fails after assigning priv to global variable
cpg_mssr_priv, it deallocates priv, but cpg_mssr_priv keeps dangling
pointer that potentially can be used later.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: 1f7db7bbf031 ("clk: renesas: cpg-mssr: Add early clock support")
Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/1671806417-32623-1-git-send-email-khoroshilov@ispras.ru
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
drivers/clk/renesas/renesas-cpg-mssr.c