9p: Fix memory leak in v9fs_mount
v9fs_mount v9fs_session_init v9fs_cache_session_get_cookie v9fs_random_cachetag -->alloc cachetag v9ses->fscache = fscache_acquire_cookie -->maybe NULL sb = sget -->fail, goto clunk clunk_fid: v9fs_session_close if (v9ses->fscache) -->NULL kfree(v9ses->cachetag) Thus memleak happens. Link: http://lkml.kernel.org/r/20200615012153.89538-1-zhengbin13@huawei.com Fixes: 60e78d2c ("9p: Add fscache support to 9p") Cc: <stable@vger.kernel.org> # v2.6.32+ Signed-off-by: Zheng Bin <zhengbin13@huawei.com> Signed-off-by: Dominique Martinet <asmadeus@codewreck.org>
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