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fs/squashfs: NULL dereference in sqfs_closedir()

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sqfs_opendir() called in sqfs_size(), sqfs_read(), sqfs_exists() may fail
leading to sqfs_closedir(NULL) being called. Do not dereference NULL.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
This commit is contained in:
Heinrich Schuchardt 2021-02-01 03:28:48 +01:00 committed by Tom Rini
parent da7991b38e
commit 220fa478fb
1 changed files with 3 additions and 0 deletions
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3
fs/squashfs/sqfs.c
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@ -1716,6 +1716,9 @@ void sqfs_closedir(struct fs_dir_stream *dirs)
{ {
struct squashfs_dir_stream *sqfs_dirs; struct squashfs_dir_stream *sqfs_dirs;
if (!dirs)
return;
sqfs_dirs = (struct squashfs_dir_stream *)dirs; sqfs_dirs = (struct squashfs_dir_stream *)dirs;
free(sqfs_dirs->inode_table); free(sqfs_dirs->inode_table);
free(sqfs_dirs->dir_table); free(sqfs_dirs->dir_table);