net: systemport: Fix buffer overflow in bcm_sysport_get_stats()

When running on SYSTEMPORT Lite, certain statistics are unsupported and
skipped during bcm_sysport_get_stats(). The variable 'j' tracks the
compacted index into the destination data buffer, whereas 'i' iterates
over all elements in bcm_sysport_gstrings_stats.

Because the buffer allocated by ethtool is sized only according to
bcm_sysport_get_sset_count(), storing values at data[i] instead of
data[j] writes past the allocated array bounds, leading to memory
corruption.

Fix this by writing to data[j] instead of data[i].

Fixes: 10377ba7673d ("net: systemport: Support 64bit statistics")
Reviewed-by: Nicolai Buchwitz <nb@tipi-net.de>
Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>
Link: https://patch.msgid.link/20260922232440.598918-2-florian.fainelli@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

0 files changed, 0 insertions, 0 deletions