From: Hao Wu <hao.a.wu@intel.com>
To: edk2-devel@lists.01.org
Cc: Hao Wu <hao.a.wu@intel.com>, Steven Shi <steven.shi@intel.com>,
Michael Kinney <michael.d.kinney@intel.com>,
Liming Gao <liming.gao@intel.com>,
Star Zeng <star.zeng@intel.com>, Eric Dong <eric.dong@intel.com>,
Fu Siyuan <siyuan.fu@intel.com>, Ye Ting <ting.ye@intel.com>,
Wu Jiaxin <jiaxin.wu@intel.com>, Qin Long <qin.long@intel.com>,
Paolo Bonzini <pbonzini@redhat.com>
Subject: [PATCH v2 0/6] Resolve undefined behaviours in left shift OPs
Date: Thu, 21 Sep 2017 14:46:11 +0800 [thread overview]
Message-ID: <20170921064617.2628-1-hao.a.wu@intel.com> (raw)
According to the feebacks from Paolo, the following changes are made in
this version of patch series:
a. Refine the code logic in Tpl.c to void left shifting the negative
value. Also makes the code more readable;
b. Remove the '~' operator before 'Time.Hour' in DxeNetLib.c, since it
seems like an implementation choice for generating the seed;
c. Use '1U' instead of '(UINT32)1' in Crc32.c.
V1 history:
The series resolves two kinds of undefined behaviours in left shift
operations:
a. Left-shifting negative values;
b. Left-shifting that incurs the result being out of range.
Cc: Steven Shi <steven.shi@intel.com>
Cc: Michael Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
Cc: Eric Dong <eric.dong@intel.com>
Cc: Fu Siyuan <siyuan.fu@intel.com>
Cc: Ye Ting <ting.ye@intel.com>
Cc: Wu Jiaxin <jiaxin.wu@intel.com>
Cc: Qin Long <qin.long@intel.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Hao Wu (6):
MdePkg/PrintLib: Fix possible negative value left shift
MdeModulePkg/PrintLib: Fix possible negative value left shift
MdeModulePkg/Tpl: Fix negative value left shift
MdeModulePkg/DxeNetLib: Fix negative value left shift
MdeModulePkg/Crc32: Fix possible out of range left shift
MdeModulePkg/AtaAtapiPassThru: Fix possible out of range left shift
MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AhciMode.c | 4 ++--
MdeModulePkg/Core/Dxe/Event/Tpl.c | 12 +++++++++---
MdeModulePkg/Core/RuntimeDxe/Crc32.c | 6 +++---
MdeModulePkg/Library/DxeNetLib/DxeNetLib.c | 2 +-
MdeModulePkg/Library/DxePrintLibPrint2Protocol/PrintLib.c | 2 +-
MdePkg/Library/BasePrintLib/PrintLibInternal.c | 2 +-
6 files changed, 17 insertions(+), 11 deletions(-)
--
2.12.0.windows.1
next reply other threads:[~2017-09-21 6:43 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-21 6:46 Hao Wu [this message]
2017-09-21 6:46 ` [PATCH v2 1/6] MdePkg/PrintLib: Fix possible negative value left shift Hao Wu
2017-09-28 3:58 ` Gao, Liming
2017-09-21 6:46 ` [PATCH v2 2/6] MdeModulePkg/PrintLib: " Hao Wu
2017-09-28 3:58 ` Gao, Liming
2017-09-21 6:46 ` [PATCH v2 3/6] MdeModulePkg/Tpl: Fix " Hao Wu
2017-09-25 6:21 ` Zeng, Star
2017-09-21 6:46 ` [PATCH v2 4/6] MdeModulePkg/DxeNetLib: " Hao Wu
2017-09-25 6:21 ` Zeng, Star
2017-09-21 6:46 ` [PATCH v2 5/6] MdeModulePkg/Crc32: Fix possible out of range " Hao Wu
2017-09-28 3:54 ` Gao, Liming
2017-09-28 3:55 ` Wu, Hao A
2017-09-21 6:46 ` [PATCH v2 6/6] MdeModulePkg/AtaAtapiPassThru: " Hao Wu
2017-09-25 6:24 ` Zeng, Star
2017-09-28 3:56 ` Gao, Liming
2017-09-28 5:13 ` Zeng, Star
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