Re: [mac80211] BUG_ON with current -git (4.8.0-11417-g24532f7)
From: Andy Lutomirski <luto@amacapital.net>
Date: 2016-10-13 06:06:33
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Possibly related (same subject, not in this thread)
- 2016-10-14 · Re: [mac80211] BUG_ON with current -git (4.8.0-11417-g24532f7) · Ard Biesheuvel <hidden>
- 2016-10-14 · Re: [mac80211] BUG_ON with current -git (4.8.0-11417-g24532f7) · Johannes Berg <johannes@sipsolutions.net>
- 2016-10-14 · Re: [mac80211] BUG_ON with current -git (4.8.0-11417-g24532f7) · Ard Biesheuvel <hidden>
- 2016-10-14 · Re: [mac80211] BUG_ON with current -git (4.8.0-11417-g24532f7) · Johannes Berg <johannes@sipsolutions.net>
- 2016-10-14 · Re: [mac80211] BUG_ON with current -git (4.8.0-11417-g24532f7) · Ard Biesheuvel <hidden>
On Wed, Oct 12, 2016 at 7:22 AM, Johannes Berg [off-list ref] wrote:
quoted
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Can you elaborate on how exactly it kills your system?the last time I saw it it was a NULL deref at ieee80211_aes_ccm_decrypt.Hm. I was expecting something within the crypto code would cause the crash, this seems strange. Anyway, I'm surely out of my depth wrt. the actual cause. Something like the patch below probably works around it, but it's horribly inefficient due to the locking and doesn't cover CMAC/GMAC either.
In a pinch, I have these patches sitting around: https://git.kernel.org/cgit/linux/kernel/git/luto/linux.git/commit/?h=x86/vmap_stack&id=0a39cfa6fbb5d5635c85253cc7d6b44b54822afd https://git.kernel.org/cgit/linux/kernel/git/luto/linux.git/commit/?h=x86/vmap_stack&id=bf8cfa200b5a01383ea39fc8ce2f32909767baa8 I don't like them, though. I think it's rather silly that we can't just pass virtual addresses to the crypto code.