linux-kernel - [PATCH 4.14 21/22] kernel/exit.c: export abort() to modules

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Message-Id: <20180209133935.673577380@linuxfoundation.org>
Date:   Fri,  9 Feb 2018 14:40:10 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Vineet Gupta <Vineet.Gupta1@...opsys.com>,
        Sudip Mukherjee <sudipm.mukherjee@...il.com>,
        Arnd Bergmann <arnd@...db.de>,
        Alexey Brodkin <Alexey.Brodkin@...opsys.com>,
        Russell King <rmk+kernel@...linux.org.uk>,
        Jose Abreu <Jose.Abreu@...opsys.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Evgeniy Didin <Evgeniy.Didin@...opsys.com>
Subject: [PATCH 4.14 21/22] kernel/exit.c: export abort() to modules

4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Andrew Morton <akpm@...ux-foundation.org>

commit dc8635b78cd8669c37e230058d18c33af7451ab1 upstream.

gcc -fisolate-erroneous-paths-dereference can generate calls to abort()
from modular code too.

[arnd@...db.de: drop duplicate exports of abort()]
  Link: http://lkml.kernel.org/r/20180102103311.706364-1-arnd@arndb.de
Reported-by: Vineet Gupta <Vineet.Gupta1@...opsys.com>
Cc: Sudip Mukherjee <sudipm.mukherjee@...il.com>
Cc: Arnd Bergmann <arnd@...db.de>
Cc: Alexey Brodkin <Alexey.Brodkin@...opsys.com>
Cc: Russell King <rmk+kernel@...linux.org.uk>
Cc: Jose Abreu <Jose.Abreu@...opsys.com>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
Signed-off-by: Arnd Bergmann <arnd@...db.de>
Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Evgeniy Didin <Evgeniy.Didin@...opsys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 arch/arm/kernel/traps.c       |    1 -
 arch/m32r/kernel/traps.c      |    1 -
 arch/unicore32/kernel/traps.c |    1 -
 kernel/exit.c                 |    1 +
 4 files changed, 1 insertion(+), 3 deletions(-)

--- a/arch/arm/kernel/traps.c
+++ b/arch/arm/kernel/traps.c
@@ -790,7 +790,6 @@ void abort(void)
 	/* if that doesn't kill us, halt */
 	panic("Oops failed to kill thread");
 }
-EXPORT_SYMBOL(abort);
 
 void __init trap_init(void)
 {
--- a/arch/m32r/kernel/traps.c
+++ b/arch/m32r/kernel/traps.c
@@ -122,7 +122,6 @@ void abort(void)
 	/* if that doesn't kill us, halt */
 	panic("Oops failed to kill thread");
 }
-EXPORT_SYMBOL(abort);
 
 void __init trap_init(void)
 {
--- a/arch/unicore32/kernel/traps.c
+++ b/arch/unicore32/kernel/traps.c
@@ -298,7 +298,6 @@ void abort(void)
 	/* if that doesn't kill us, halt */
 	panic("Oops failed to kill thread");
 }
-EXPORT_SYMBOL(abort);
 
 void __init trap_init(void)
 {
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -1763,3 +1763,4 @@ __weak void abort(void)
 	/* if that doesn't kill us, halt */
 	panic("Oops failed to kill thread");
 }
+EXPORT_SYMBOL(abort);