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Red Hat Bugzilla – Attachment 311573 Details for
Bug 454865
read() returns incorrect value
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[patch]
v2.: patch fixes copy_user_generic return value on error path
diff-copy-user-return-value-2 (text/plain), 457 bytes, created by
Konstantin Khorenko
on 2008-07-11 13:14:19 UTC
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Description:
v2.: patch fixes copy_user_generic return value on error path
Filename:
MIME Type:
Creator:
Konstantin Khorenko
Created:
2008-07-11 13:14:19 UTC
Size:
457 bytes
patch
obsolete
>--- ./arch/x86_64/lib/copy_user.S.orig 2008-07-11 16:33:44.000000000 +0400 >+++ ./arch/x86_64/lib/copy_user.S 2008-07-11 17:02:43.000000000 +0400 >@@ -315,11 +315,14 @@ copy_user_generic_c: > .Lc1e: movq %rcx,%rsi > .Lc3: rep > stosq >-.Lc2e: movl %edx,%ecx >+.Lc2ec: movl %edx,%ecx > .Lc4: rep > stosb > .Lc3e: leaq (%rdx,%rsi,8),%rax > ret >+ /* %rsi contains source address - clear it */ >+.Lc2e: xorq %rsi,%rsi >+ jmp .Lc2ec > > .section __ex_table,"a" > .align 8
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