target: Don't call TFO->write_pending if data_length == 0

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commit 885e7b0e18 upstream.

If an initiator sends a zero-length command (e.g. TEST UNIT READY) but
sets the transfer direction in the transport layer to indicate a
data-out phase, we still shouldn't try to transfer data.  At best it's
a NOP, and depending on the transport, we might crash on an
uninitialized sg list.

Reported-by: Craig Watson <craig.watson@vanguard-rugged.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>

...

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Roland Dreier 2014-10-14 14:16:24 -07:00 • committed by Luis Henriques

parent 81f15cc0d1

commit 508f914cb3

1 changed files with 1 additions and 1 deletions

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drivers/target/target_core_transport.c

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