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| author | Johan Hovold <johan@kernel.org> | 2021-09-17 13:46:20 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-09-27 17:38:49 +0200 |
| commit | 445c8132727728dc297492a7d9fc074af3e94ba3 (patch) | |
| tree | b0f1cfb50ae42f2569fcce6097772d5a45d383eb /drivers/ipack | |
| parent | cd20d59291d1790dc74248476e928f57fc455189 (diff) | |
| download | lwn-445c8132727728dc297492a7d9fc074af3e94ba3.tar.gz lwn-445c8132727728dc297492a7d9fc074af3e94ba3.zip | |
ipack: ipoctal: fix missing allocation-failure check
Add the missing error handling when allocating the transmit buffer to
avoid dereferencing a NULL pointer in write() should the allocation
ever fail.
Fixes: ba4dc61fe8c5 ("Staging: ipack: add support for IP-OCTAL mezzanine board")
Cc: stable@vger.kernel.org # 3.5
Acked-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20210917114622.5412-5-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/ipack')
| -rw-r--r-- | drivers/ipack/devices/ipoctal.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/ipack/devices/ipoctal.c b/drivers/ipack/devices/ipoctal.c index d6875aa6a295..61c41f535510 100644 --- a/drivers/ipack/devices/ipoctal.c +++ b/drivers/ipack/devices/ipoctal.c @@ -385,7 +385,9 @@ static int ipoctal_inst_slot(struct ipoctal *ipoctal, unsigned int bus_nr, channel = &ipoctal->channel[i]; tty_port_init(&channel->tty_port); - tty_port_alloc_xmit_buf(&channel->tty_port); + res = tty_port_alloc_xmit_buf(&channel->tty_port); + if (res) + continue; channel->tty_port.ops = &ipoctal_tty_port_ops; ipoctal_reset_stats(&channel->stats); |