This is a note to let you know that I've just added the patch titled
pinctrl: thunderbay: fix possible memory leak in thunderbay_build_functions()
to the 6.0-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
pinctrl-thunderbay-fix-possible-memory-leak-in-thund.patch
and it can be found in the queue-6.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit dd73048a5ceff3aa70d33f821974aa50fce9ead1
Author: Gaosheng Cui <cuigaosheng1@xxxxxxxxxx>
Date: Tue Nov 29 20:01:26 2022 +0800
pinctrl: thunderbay: fix possible memory leak in thunderbay_build_functions()
[ Upstream commit 83e1bcaf8cef26edaaf2a6098ef760f563683483 ]
The thunderbay_add_functions() will free memory of thunderbay_funcs
when everything is ok, but thunderbay_funcs will not be freed when
thunderbay_add_functions() fails, then there will be a memory leak,
so we need to add kfree() when thunderbay_add_functions() fails to
fix it.
In addition, doing some cleaner works, moving kfree(funcs) from
thunderbay_add_functions() to thunderbay_build_functions().
Fixes: 12422af8194d ("pinctrl: Add Intel Thunder Bay pinctrl driver")
Signed-off-by: Gaosheng Cui <cuigaosheng1@xxxxxxxxxx>
Reviewed-by: Rafał Miłecki <rafal@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20221129120126.1567338-1-cuigaosheng1@xxxxxxxxxx
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/pinctrl/pinctrl-thunderbay.c b/drivers/pinctrl/pinctrl-thunderbay.c
index 9328b17485cf..590bbbf619af 100644
--- a/drivers/pinctrl/pinctrl-thunderbay.c
+++ b/drivers/pinctrl/pinctrl-thunderbay.c
@@ -808,7 +808,7 @@ static int thunderbay_add_functions(struct thunderbay_pinctrl *tpc, struct funct
funcs[i].num_group_names,
funcs[i].data);
}
- kfree(funcs);
+
return 0;
}
@@ -817,6 +817,7 @@ static int thunderbay_build_functions(struct thunderbay_pinctrl *tpc)
struct function_desc *thunderbay_funcs;
void *ptr;
int pin;
+ int ret;
/*
* Allocate maximum possible number of functions. Assume every pin
@@ -860,7 +861,10 @@ static int thunderbay_build_functions(struct thunderbay_pinctrl *tpc)
return -ENOMEM;
thunderbay_funcs = ptr;
- return thunderbay_add_functions(tpc, thunderbay_funcs);
+ ret = thunderbay_add_functions(tpc, thunderbay_funcs);
+
+ kfree(thunderbay_funcs);
+ return ret;
}
static int thunderbay_pinconf_set_tristate(struct thunderbay_pinctrl *tpc,
