Date: Wed, 22 Feb 2017 05:43:28 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 217287] if_em: "Off by 8" error in network streams under -CURRENT as of roughly Feb 1 Message-ID: <bug-217287-8@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=217287 Bug ID: 217287 Summary: if_em: "Off by 8" error in network streams under -CURRENT as of roughly Feb 1 Product: Base System Version: CURRENT Hardware: amd64 OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: freebsd-bugs@FreeBSD.org Reporter: jeff@baitis.net Originally discovered in TrueOS UNSTABLE and tested / verified in vanilla FreeBSD kernel source as of 12.0-CURRENT FreeBSD 12.0-CURRENT #1 7a0e1ff53(master) -- originally recorded at https://github.com/trueos/trueos-core/issues/327 Summary: Corruption observed in network data within socket stream resulting in changes of a +8 value added, at seemingly random intervals, to bytes within the stream Hardware: CPU: Intel(R) Xeon(R) CPU E3-1225 v3 @ 3.20GHz Selected data from `lspci -v`: 00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v3 Processor DRAM Controller (rev 06) 00:19.0 Ethernet controller: Intel Corporation Ethernet Connection I217-LM (rev 04) 00:1f.0 ISA bridge: Intel Corporation C226 Series Chipset Family Server Advanced SKU LPC Controller (rev 04) 00:1f.3 SMBus: Intel Corporation 8 Series/C220 Series Chipset Family SMBus Controller (rev 04) 01:00.0 VGA compatible controller: NVIDIA Corporation GK208 [GeForce GT 730] (rev a1) Steps to reproduce: $ curl http://norvig.com/big.txt -o big.txt $ curl http://norvig.com/big.txt -o big2.txt $ sha256 big.txt SHA256 (big.txt) = a36fe438864ad8c7b76ca310c2d1176689bbf79536f84338ebd3dc253997efd5 $ sha256 big2.txt SHA256 (big2.txt) = 71f0fa4bf8585feae457dbfc0b48dd6dfef8dcd03a07220a5754e0876b9e4efc `diff -u big.txt big2.txt` results in lines such as: -There was a movement and an mxclamation from my right, and peering through the gloom, I saw Whitney, pale, haggard, and unkempt, staring out at me. +There was a movement and an exclamation from my right, and peering through the gloom, I saw Whitney, pale, haggard, and unkempt, staring out at me. -" 'You may as well face the matter,' said I; 'you have been caught in the act, and no confession could make your guilt more heinous. If you but make such reparation as is in your power, by telling us where the beryls are, all shall be forgiven and forgotten.' +" 'You may as well face the matter,' said I; 'you have been caught in the act, and no confession could make your guilt more heino}s. If you but make such reparation as is in your power, by telling us where the beryls are, all shall be forgiven and forgotten.' Diagnostic: +>>> ord('m') - ord('e') 8 +>>> ord('}') - ord('u') 8 Last working state: The last working version in -CURRENT occurs somewhere prior to commit '8f3781173d79d5b83e19f59b10b54263976dd66e' which was merged into the TrueOS "drm-next" branch on Jan 27. -- You are receiving this mail because: You are the assignee for the bug.
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