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Gentoo's Bugzilla – Attachment 379130 Details for
Bug 513308
vanilla 3.15 - calling syscall(1000) triggers a BUG in kernel's auditd
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[patch]
fix
0001-x86_32-entry-Fix-badsys-paths.patch (text/plain), 1.54 KB, created by
Toralf Förster
on 2014-06-17 15:39:51 UTC
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Description:
fix
Filename:
MIME Type:
Creator:
Toralf Förster
Created:
2014-06-17 15:39:51 UTC
Size:
1.54 KB
patch
obsolete
>From 8b43bd2118d876cb3163e8f7d9cd8253da649335 Mon Sep 17 00:00:00 2001 >Message-Id: <8b43bd2118d876cb3163e8f7d9cd8253da649335.1402954406.git.luto@amacapital.net> >From: Andy Lutomirski <luto@amacapital.net> >Date: Mon, 16 Jun 2014 14:28:19 -0700 >Subject: [PATCH] x86_32,entry: Fix badsys paths >MIME-Version: 1.0 >Content-Type: text/plain; charset=UTF-8 >Content-Transfer-Encoding: 8bit > >The bad syscall nr paths are their own incomprehensible route >through the entry control flow. Rearrange them to work just like >syscalls that return -ENOSYS. > >This should fix an OOPS in the audit code when auditing is enabled >and bad syscall nrs are used. > >Reported-by: Toralf Förster <toralf.foerster@gmx.de> >Signed-off-by: Andy Lutomirski <luto@amacapital.net> >--- > arch/x86/kernel/entry_32.S | 10 ++++++++-- > 1 file changed, 8 insertions(+), 2 deletions(-) > >diff --git a/arch/x86/kernel/entry_32.S b/arch/x86/kernel/entry_32.S >index 98313ff..eb6e07e 100644 >--- a/arch/x86/kernel/entry_32.S >+++ b/arch/x86/kernel/entry_32.S >@@ -431,9 +431,10 @@ sysenter_past_esp: > jnz sysenter_audit > sysenter_do_call: > cmpl $(NR_syscalls), %eax >- jae syscall_badsys >+ jae sysenter_badsys > call *sys_call_table(,%eax,4) > movl %eax,PT_EAX(%esp) >+sysenter_after_call: > LOCKDEP_SYS_EXIT > DISABLE_INTERRUPTS(CLBR_ANY) > TRACE_IRQS_OFF >@@ -687,7 +688,12 @@ END(syscall_fault) > > syscall_badsys: > movl $-ENOSYS,PT_EAX(%esp) >- jmp resume_userspace >+ jmp syscall_exit >+END(syscall_badsys) >+ >+sysenter_badsys: >+ movl $-ENOSYS,PT_EAX(%esp) >+ jmp sysenter_after_call > END(syscall_badsys) > CFI_ENDPROC > /* >-- >1.9.3 >
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bug 513308
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378926
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