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NTB: ntb_tool: fix memory leak on 'buf' on error exit path

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Currently there is a memory leak on buf when the call to ntb_mw_get_align
fails.  Add an exit err label and jump to this so that kfree on buf frees
the memory.

Detected by CoverityScan, CID#1464286 ("Resource leak")

Fixes: d637628ce00c ("NTB: ntb_tool: Add full multi-port NTB API support")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Serge Semin <fancer.lancer@gmail.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
This commit is contained in:
Colin Ian King 2018-01-22 09:38:57 +00:00 committed by Jon Mason
parent 1536dc063e
commit 2e2bc5a9a3
1 changed files with 3 additions and 1 deletions
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4
drivers/ntb/test/ntb_tool.c
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@ -659,7 +659,7 @@ static ssize_t tool_mw_trans_read(struct file *filep, char __user *ubuf,
ret = ntb_mw_get_align(inmw->tc->ntb, inmw->pidx, inmw->widx,
&addr_align, &size_align, &size_max);
if (ret)
return ret;
goto err;
off += scnprintf(buf + off, buf_size - off,
"Inbound MW \t%d\n",
@ -694,6 +694,8 @@ static ssize_t tool_mw_trans_read(struct file *filep, char __user *ubuf,
&size_max);
ret = simple_read_from_buffer(ubuf, size, offp, buf, off);
err:
kfree(buf);
return ret;