Messages in this thread | | | Subject | Re: Glibc recvmsg from kernel netlink socket hangs forever | From | Guenter Roeck <> | Date | Fri, 25 Sep 2015 19:58:43 -0700 |
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On 09/25/2015 02:37 PM, Steven Schlansker wrote: > > On Sep 24, 2015, at 10:34 PM, Guenter Roeck <linux@roeck-us.net> wrote: > >> Herbert, >> >> On 09/24/2015 09:58 PM, Herbert Xu wrote: >>> On Thu, Sep 24, 2015 at 09:36:53PM -0700, Guenter Roeck wrote: >>>> >>>> http://comments.gmane.org/gmane.linux.network/363085 >>>> >>>> might explain your problem. >>>> >>>> I thought this was resolved in 4.1, but it looks like the problem still persists >>>> there. At least I have reports from my workplace that 4.1.6 and 4.1.7 are still >>>> affected. I don't know if there have been any relevant changes in 4.2. >>>> >>>> Copying Herbert and Eric for additional input. >>> >>> There was a separate bug discovered by Tejun recently. You need >>> to apply the patches >>> >>> https://patchwork.ozlabs.org/patch/519245/ >>> https://patchwork.ozlabs.org/patch/520824/ >>> >> I assume this is on top of mainline ? >> >>> There is another follow-up but it shouldn't make any difference >>> in practice. >>> >> >> Any idea what may be needed for 4.1 ? >> I am currently trying https://patchwork.ozlabs.org/patch/473041/, >> but I have no idea if that will help with the problem we are seeing there. > > Thank you for the patches to try, I'll build a kernel with them early next week > and report back. It sounds like it may not match my problem exactly so we'll > see. > > In the meantime, I also observed the following oops: > > [ 1709.620092] kernel tried to execute NX-protected page - exploit attempt? (uid: 0) > [ 1709.624058] BUG: unable to handle kernel paging request at ffffea001dbef3c0 > [ 1709.624058] IP: [<ffffea001dbef3c0>] 0xffffea001dbef3c0 > [ 1709.624058] PGD 78f7dc067 PUD 78f7db067 PMD 800000078ec001e3 > [ 1709.624058] Oops: 0011 [#1] SMP > [ 1709.624058] Modules linked in: i2c_piix4(E) btrfs(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) aesni_intel(E) aes_x86_64(E) lrw(E) gf128mul(E) glue_helper(E) ablk_helper(E) cryptd(E) floppy(E) > [ 1709.624058] CPU: 4 PID: 19714 Comm: pf_dump Tainted: G E 4.0.4 #1
For 4.0.x, you _really_ need to update to 4.0.9 to get the following two patches.
cf8befcc1a55 netlink: Disable insertions/removals during rehash 18889a4315a5 netlink: Reset portid after netlink_insert failure
Guenter
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