Messages in this thread | | | Date | Thu, 8 Mar 2018 15:33:28 +0800 | From | Herbert Xu <> | Subject | Re: [PATCH] net: xfrm: use preempt-safe this_cpu_read() in ipcomp_alloc_tfms() |
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On Wed, Mar 07, 2018 at 11:24:16AM -0800, Greg Hackmann wrote: > f7c83bcbfaf5 ("net: xfrm: use __this_cpu_read per-cpu helper") added a > __this_cpu_read() call inside ipcomp_alloc_tfms(). Since this call was > introduced, the rules around per-cpu accessors have been tightened and > __this_cpu_read() cannot be used in a preemptible context. > > syzkaller reported this leading to the following kernel BUG while > fuzzing sendmsg:
How about reverting f7c83bcbfaf5 instead?
Thanks, -- Email: Herbert Xu <herbert@gondor.apana.org.au> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
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