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kernfs: fix potential null pointer dereference
authorPeng Wang <rocking@whu.edu.cn>
Mon, 8 Jul 2019 15:16:11 +0000 (23:16 +0800)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 25 Jul 2019 13:30:48 +0000 (15:30 +0200)
commit2fd60da46da76948b8cc561ae8cc902209686253
tree210588885a1e314349fca90aea6cfa5d3f11b3eftree
parent515db266a9dace92b0cbaed9a6044dd5304b8ca9commit | diff
kernfs: fix potential null pointer dereference

Get root safely after kn is ensureed to be not null.

Signed-off-by: Peng Wang <rocking@whu.edu.cn>
Acked-by: Tejun Heo <tj@kernel.org>
Link: https://lore.kernel.org/r/20190708151611.13242-1-rocking@whu.edu.cn
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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