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Add pointer check for NULL before dereference it.

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Signed-off-by: sfu5
Reviewed-by: gdong1
Reviewed-by : czhan46

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12764 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
sfu5 2011-11-23 05:05:12 +00:00
parent d359254990
commit e1982d4ca9
1 changed files with 6 additions and 2 deletions
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8
MdeModulePkg/Universal/Network/Dhcp4Dxe/Dhcp4Io.c
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@ -1621,7 +1621,9 @@ DhcpOnTimerTick (
goto END_SESSION; goto END_SESSION;
} }
Instance->ElaspedTime= 0; if (Instance != NULL) {
Instance->ElaspedTime= 0;
}
Status = DhcpSendMessage ( Status = DhcpSendMessage (
DhcpSb, DhcpSb,
@ -1643,7 +1645,9 @@ DhcpOnTimerTick (
goto END_SESSION; goto END_SESSION;
} }
Instance->ElaspedTime= 0; if (Instance != NULL) {
Instance->ElaspedTime= 0;
}
Status = DhcpSendMessage ( Status = DhcpSendMessage (
DhcpSb, DhcpSb,