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Subject[PATCH] mISDN: Remove VLAs
Date

There's an ongoing effort to remove VLAs[1] from the kernel to eventually
turn on -Wvla. Remove the VLAs from the mISDN code by switching to using
kstrdup in one place and just using the upper bound in another.

[1] https://lkml.org/lkml/2018/3/7/621

Signed-off-by: Laura Abbott <labbott@redhat.com>
---
drivers/isdn/mISDN/dsp_hwec.c | 8 +++++---
drivers/isdn/mISDN/l1oip_core.c | 2 +-
2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/isdn/mISDN/dsp_hwec.c b/drivers/isdn/mISDN/dsp_hwec.c
index a6e87076acc2..5336bbdbfdc5 100644
--- a/drivers/isdn/mISDN/dsp_hwec.c
+++ b/drivers/isdn/mISDN/dsp_hwec.c
@@ -68,12 +68,12 @@ void dsp_hwec_enable(struct dsp *dsp, const char *arg)
goto _do;

{
- char _dup[len + 1];
char *dup, *tok, *name, *val;
int tmp;

- strcpy(_dup, arg);
- dup = _dup;
+ dup = kstrdup(arg, GFP_ATOMIC);
+ if (!dup)
+ return;

while ((tok = strsep(&dup, ","))) {
if (!strlen(tok))
@@ -89,6 +89,8 @@ void dsp_hwec_enable(struct dsp *dsp, const char *arg)
deftaps = tmp;
}
}
+
+ kfree(dup);
}

_do:
diff --git a/drivers/isdn/mISDN/l1oip_core.c b/drivers/isdn/mISDN/l1oip_core.c
index 21d50e4cc5e1..df594245deca 100644
--- a/drivers/isdn/mISDN/l1oip_core.c
+++ b/drivers/isdn/mISDN/l1oip_core.c
@@ -279,7 +279,7 @@ l1oip_socket_send(struct l1oip *hc, u8 localcodec, u8 channel, u32 chanmask,
u16 timebase, u8 *buf, int len)
{
u8 *p;
- u8 frame[len + 32];
+ u8 frame[L1OIP_MAX_PERFRAME + 32];
struct socket *socket = NULL;

if (debug & DEBUG_L1OIP_MSG)
--
2.14.3
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