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authorOmar Sandoval <osandov@fb.com>2017-02-01 00:02:27 -0800
committerMichael S. Tsirkin <mst@redhat.com>2017-03-02 01:35:06 +0200
commitc4baad50297d84bde1a7ad45e50c73adae4a2192 (patch)
tree2efdf37fc4b48748d19ed2e3cb8a75908581fd26 /block/Kconfig
parentf889491380582b4ba2981cf0b0d7d6a40fb30ab7 (diff)
downloadlinux-0-day-c4baad50297d84bde1a7ad45e50c73adae4a2192.tar.gz
linux-0-day-c4baad50297d84bde1a7ad45e50c73adae4a2192.tar.xz
virtio-console: avoid DMA from stack
put_chars() stuffs the buffer it gets into an sg, but that buffer may be on the stack. This breaks with CONFIG_VMAP_STACK=y (for me, it manifested as printks getting turned into NUL bytes). Signed-off-by: Omar Sandoval <osandov@fb.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Amit Shah <amit.shah@redhat.com>
Diffstat (limited to 'block/Kconfig')
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