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Date: Thu, 29 Oct 2020 00:14:51 -0400 From: "Theodore Y. Ts'o" <tytso@....edu> To: yangerkun <yangerkun@...wei.com> Cc: jack@...e.com, adilger@...ger.ca, linux-ext4@...r.kernel.org Subject: Re: [PATCH] ext4: do not use extent after put_bh On Wed, Oct 28, 2020 at 01:56:17PM +0800, yangerkun wrote: > ext4_ext_search_right will read more extent block and call put_bh after > we get the information we need. However ret_ex will break this and may > cause use-after-free once pagecache has been freed. Fix it by dup the > extent we need. > > Signed-off-by: yangerkun <yangerkun@...wei.com> Good catch! Thanks, applied. - Ted
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