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由 Theodore Ts'o 提交于
A malicious user could force the directory pointer to be in an invalid spot by using seekdir(2). Use the mechanism we already have to notice if the directory has changed since the last time we called ext4_readdir() to force a revalidation of the pointer. Reported-by: syzbot+1236ce66f79263e8a862@syzkaller.appspotmail.com Signed-off-by: NTheodore Ts'o <tytso@mit.edu> Cc: stable@vger.kernel.org
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