https://github.com/torvalds/linux
There's a race on CPU unplug where we free the swevent hash array while it can still have events on. This will result in a use-after-free which is BAD. Simply do not free the hash array on unplug. This leaves the thing around and no use-after-free takes place. When the last swevent dies, we do a for_each_possible_cpu() iteration anyway to clean these up, at which time we'll free it, so no leakage will occur. Reported-by: Sasha Levin <sasha.levin@oracle.com> Tested-by: Sasha Levin <sasha.levin@oracle.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Signed-off-by: Ingo Molnar <mingo@kernel.org>
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- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
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- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
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- v2.6.24
- v2.6.23-rc9
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perf: Fix race in swevent hash
#undef IRQ_DISABLE
#undef IRQ_ENABLE
#undef IRQ_ENTER
#undef IRQ_EXIT
#define IRQ_ENABLE HARDIRQ_ENABLE
#define IRQ_DISABLE HARDIRQ_DISABLE
#define IRQ_ENTER HARDIRQ_ENTER
#define IRQ_EXIT HARDIRQ_EXIT
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Computing file changes ...