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| author | Greg KH <gregkh@linuxfoundation.org> | 2019-10-01 18:56:11 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-10-29 09:20:09 +0100 |
| commit | 27414f90ff6e1d7f6657e4a820b04a7b2d760272 (patch) | |
| tree | a0fa38b9a69f4a4332d4b832b566130586ac30f2 /tools/perf/scripts/python/stackcollapse.py | |
| parent | 054441182b51beca00f0c639b0119a1995143772 (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 'tools/perf/scripts/python/stackcollapse.py')
0 files changed, 0 insertions, 0 deletions