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author | Greg KH <gregkh@linuxfoundation.org> | 2019-10-01 18:56:11 +0200 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-10-29 09:13:33 +0100 |
commit | 3cd0698561d3e9dcb7c969077932e072fbb4689e (patch) | |
tree | f9ed82889da7ede3a1387abd262802486751a3fd /arch | |
parent | 23e0c38d3099f01f5c44446101a40743faf5ff76 (diff) |
RDMA/cxgb4: Do not dma memory off of the stack
commit 3840c5b78803b2b6cc1ff820100a74a092c40cbb upstream.
Nicolas pointed out that the cxgb4 driver is doing dma off of the stack,
which is generally considered a very bad thing. On some architectures it
could be a security problem, but odds are none of them actually run this
driver, so it's just a "normal" bug.
Resolve this by allocating the memory for a message off of the heap
instead of the stack. kmalloc() always will give us a proper memory
location that DMA will work correctly from.
Link: https://lore.kernel.org/r/20191001165611.GA3542072@kroah.com
Reported-by: Nicolas Waisman <nico@semmle.com>
Tested-by: Potnuri Bharat Teja <bharat@chelsio.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch')
0 files changed, 0 insertions, 0 deletions