lguest: allow booting guest with CONFIG_RELOCATABLE=y
authorRusty Russell <rusty@rustcorp.com.au>
Mon, 15 Aug 2011 00:45:10 +0000 (09:45 +0930)
committerRusty Russell <rusty@rustcorp.com.au>
Mon, 15 Aug 2011 00:45:10 +0000 (09:45 +0930)
commite22a539824e8ddb82c87b4f415165ede82e6ab56
tree39d68ab2ad811abc19a1fc1595fd71a37df43aae
parentc3c53a073247ee7522ca80393319540db9f4dc1e
lguest: allow booting guest with CONFIG_RELOCATABLE=y

The CONFIG_RELOCATABLE code tries to align the unpack destination to
the value of 'kernel_alignment' in the setup_hdr.  If that's 0, it
tries to unpack to address 0, which in fact causes the gunzip code
to call 'error("Out of memory while allocating output buffer")'.

The bootloader (ie. the lguest Launcher in this case) should be doing
setting this field; the normal bzImage is 16M, we can use the same.

Reported-by: Stefanos Geraggelos <sgerag@cslab.ece.ntua.gr>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: stable@kernel.org
Documentation/virtual/lguest/lguest.c