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Red Hat Bugzilla – Attachment 294063 Details for
Bug 431431
ptrace: Unprivileged crash on x86_64 %cs corruption
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[patch]
untried RHEL4 backport of fix verified on upstream kernel
linux-2.6-paranoid-iret.patch (text/plain), 451 bytes, created by
Roland McGrath
on 2008-02-06 00:29:04 UTC
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Description:
untried RHEL4 backport of fix verified on upstream kernel
Filename:
MIME Type:
Creator:
Roland McGrath
Created:
2008-02-06 00:29:04 UTC
Size:
451 bytes
patch
obsolete
>--- linux-2.6.9/arch/x86_64/kernel/entry.S >+++ linux-2.6.9/arch/x86_64/kernel/entry.S >@@ -662,9 +662,7 @@ error_exit: > movl $_TIF_WORK_MASK,%edi > andl %edi,%edx > jnz retint_careful >- swapgs >- RESTORE_ARGS 0,8,0 >- iretq >+ jmp retint_swapgs > CFI_ENDPROC > > error_kernelspace: >@@ -832,7 +830,7 @@ paranoid_swapgs: > swapgs > paranoid_restore: > RESTORE_ALL 8 >- iretq >+ jmp iret_label > paranoid_userspace: > cli > GET_THREAD_INFO(%rcx) >
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bug 431431
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