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Bug 617906 - sys-kernel/gentoo-sources-{4.9.26, 4.10.14, 4.11.0} kernel panic with NULL pointer dereference
Summary: sys-kernel/gentoo-sources-{4.9.26, 4.10.14, 4.11.0} kernel panic with NULL po...
Status: RESOLVED FIXED
Alias: None
Product: Gentoo Linux
Classification: Unclassified
Component: Current packages (show other bugs)
Hardware: AMD64 Linux
: Normal normal (vote)
Assignee: Gentoo Kernel Bug Wranglers and Kernel Maintainers
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2017-05-09 00:33 UTC by holbugs
Modified: 2018-06-18 18:08 UTC (History)
1 user (show)

See Also:
Package list:
Runtime testing required: ---

Attachments
Panic message (panic_msg.txt,2.29 KB, text/plain)
2017-05-09 00:33 UTC, holbugs 		Details
Kernel .config file (config.txt,104.32 KB, text/plain)
2017-05-09 00:34 UTC, holbugs 		Details
Kernel boot messages (boot_msg.txt,56.93 KB, text/plain)
2017-05-09 00:35 UTC, holbugs 		Details
Output from lspci -k (lspci_out.txt,38.23 KB, text/plain)
2017-05-09 00:36 UTC, holbugs 		Details
Output from emerge -info (note taken under 4.10.15) (emerge_info.txt,6.74 KB, text/plain)
2017-05-09 00:38 UTC, holbugs 		Details
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Description holbugs 2017-05-09 00:33:19 UTC 
Created attachment 472032 [details]
Panic message

Kernel panic under load during disk to net backup. Tested under 4.9, 4.10, and 4.11. All panics occur between 0.5TB to 6TB of transfer with:

BUG: unable to handle kernel NULL pointer dereference at 0000000000000304

Attachments are for the 4.11.0
Comment 1 holbugs 2017-05-09 00:34:32 UTC 
Created attachment 472034 [details]
Kernel .config file
Comment 2 holbugs 2017-05-09 00:35:10 UTC 
Created attachment 472036 [details]
Kernel boot messages
Comment 3 holbugs 2017-05-09 00:36:19 UTC 
Created attachment 472038 [details]
Output from lspci -k
Comment 4 holbugs 2017-05-09 00:38:05 UTC 
Created attachment 472040 [details]
Output from emerge -info (note taken under 4.10.15)
Comment 5 holbugs 2017-06-25 17:42:18 UTC 
Reproduced this BUG/panic under 4.9.33-gentoo
Comment 6 holbugs 2017-06-25 17:55:27 UTC 
WORKAROUND: worked around this panic with a rearrangement of the PCI-E cards. The old config was - SAS controller with disk array on CPU0 PCI-E, 10G Ethernet card on CPU1 PCI-E.  The config now is - SAS controller with disk array on CPU0 PCI-E, 10G Ethernet card on CPU0 PCI-E.  

Moving the Ethernet card onto the same CPU as the disk array avoids the panic.
Comment 7 Mike Pagano gentoo-dev 2018-06-18 18:08:32 UTC 
From your comment, it appears you have found a workaround.