[PATCH AUTOSEL 4.9 06/16] cxgb4: fix a memory leak bug
From: Sasha Levin <sashal@kernel.org>
Date: 2019-08-29 18:20:43
Also in:
lkml, stable
Subsystem:
cxgb4 ethernet driver (cxgb4), networking drivers, the rest · Maintainers:
Potnuri Bharat Teja, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Wenwen Wang <redacted> [ Upstream commit c554336efa9bbc28d6ec14efbee3c7d63c61a34f ] In blocked_fl_write(), 't' is not deallocated if bitmap_parse_user() fails, leading to a memory leak bug. To fix this issue, free t before returning the error. Signed-off-by: Wenwen Wang <redacted> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c
index 20455d082cb80..61c55621b9589 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c@@ -2781,8 +2781,10 @@ static ssize_t blocked_fl_write(struct file *filp, const char __user *ubuf, return -ENOMEM; err = bitmap_parse_user(ubuf, count, t, adap->sge.egr_sz); - if (err) + if (err) { + kvfree(t); return err; + } bitmap_copy(adap->sge.blocked_fl, t, adap->sge.egr_sz); t4_free_mem(t);
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2.20.1