Re: [PATCH] [nfs/nfs-utils] mount.nfs: fix NULL pointer derefernce in nfs_parse_square_bracket

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On 10/21/22 8:41 AM, Zhi Li wrote:
In function nfs_parse_square_bracket, hostname could be NULL,
dereferencing it in free(*hostname) may cause an unexpected segfault.

Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=2136807
Signed-off-by: Zhi Li <yieli@xxxxxxxxxx>
Committed...

steved.
---
  utils/mount/parse_dev.c | 3 ++-
  1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/utils/mount/parse_dev.c b/utils/mount/parse_dev.c
index 0d3bcb95..2ade5d5d 100644
--- a/utils/mount/parse_dev.c
+++ b/utils/mount/parse_dev.c
@@ -170,7 +170,8 @@ static int nfs_parse_square_bracket(const char *dev,
  	if (pathname) {
  		*pathname = strndup(cbrace, path_len);
  		if (*pathname == NULL) {
-			free(*hostname);
+			if (hostname)
+				free(*hostname);
  			return nfs_pdn_nomem_err();
  		}
  	}




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