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| author |   Juergen Gross <jgross@suse.com> | 2025-07-03 09:32:59 +0200 |
|---|---|---|
| committer | Juergen Gross <jgross@suse.com> | 2025-07-14 17:10:09 +0200 |
| commit | 70045cf6593cbf0740956ea9b7b4269142c6ee38 (patch) | |
| tree | badc3dcc0471c3b7d0a46aeb9b92a660383620ad /tools/perf/scripts/python/Perf-Trace-Util/lib/Perf | |
| parent | xen: fix UAF in dmabuf_exp_from_pages() (diff) | |
| download | wireguard-linux-70045cf6593cbf0740956ea9b7b4269142c6ee38.tar.xz wireguard-linux-70045cf6593cbf0740956ea9b7b4269142c6ee38.zip | |
xen/gntdev: remove struct gntdev_copy_batch from stack
When compiling the kernel with LLVM, the following warning was issued:
drivers/xen/gntdev.c:991: warning: stack frame size (1160) exceeds
limit (1024) in function 'gntdev_ioctl'
The main reason is struct gntdev_copy_batch which is located on the
stack and has a size of nearly 1kb.
For performance reasons it shouldn't by just dynamically allocated
instead, so allocate a new instance when needed and instead of freeing
it put it into a list of free structs anchored in struct gntdev_priv.
Fixes: a4cdb556cae0 ("xen/gntdev: add ioctl for grant copy")
Reported-by: Abinash Singh <abinashsinghlalotra@gmail.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
Signed-off-by: Juergen Gross <jgross@suse.com>
Message-ID: <20250703073259.17356-1-jgross@suse.com>
Diffstat (limited to 'tools/perf/scripts/python/Perf-Trace-Util/lib/Perf')
0 files changed, 0 insertions, 0 deletions