diff options
author | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2020-11-29 20:35:23 +0100 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-11-30 09:20:32 +0100 |
commit | f0992098cadb4c9c6a00703b66cafe604e178fea (patch) | |
tree | 46ba746d25bb147727c739d61d1aaac35a7b40f3 /drivers/ide/ide-io-std.c | |
parent | b65054597872ce3aefbc6a666385eabdf9e288da (diff) |
speakup: Reject setting the speakup line discipline outside of speakup
Speakup exposing a line discipline allows userland to try to use it,
while it is deemed to be useless, and thus uselessly exposes potential
bugs. One of them is simply that in such a case if the line sends data,
spk_ttyio_receive_buf2 is called and crashes since spk_ttyio_synth
is NULL.
This change restricts the use of the speakup line discipline to
speakup drivers, thus avoiding such kind of issues altogether.
Cc: stable@vger.kernel.org
Reported-by: Shisong Qin <qinshisong1205@gmail.com>
Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Tested-by: Shisong Qin <qinshisong1205@gmail.com>
Link: https://lore.kernel.org/r/20201129193523.hm3f6n5xrn6fiyyc@function
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/ide/ide-io-std.c')
0 files changed, 0 insertions, 0 deletions