ext4: check for directory entries too close to block end
commit 109ba779 upstream. ext4_check_dir_entry() currently does not catch a case when a directory entry ends so close to the block end that the header of the next directory entry would not fit in the remaining space. This can lead to directory iteration code trying to access address beyond end of current buffer head leading to oops. CC: stable@vger.kernel.org Signed-off-by:Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/20191202170213.4761-3-jack@suse.cz Signed-off-by:
Theodore Ts'o <tytso@mit.edu> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
parent
1e62ac6b
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