The patch titled
arch/sparc/kernel: eliminate what looks like a NULL pointer dereference
has been added to the -mm tree. Its filename is
arch-sparc-kernel-eliminate-what-looks-like-a-null-pointer-dereference.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find
out what to do about this
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: arch/sparc/kernel: eliminate what looks like a NULL pointer dereference
From: Julia Lawall <julia@xxxxxxx>
At the point of the test, action cannot be NULL, as it has been
dereferenced in the code just above.
A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)
// <smpl>
@r exists@
expression E,E1;
identifier f;
statement S1,S2,S3;
@@
if ((E == NULL && ...) || ...)
{
... when != if (...) S1 else S2
when != E = E1
* E->f
... when any
}
else S3
// </smpl>
Signed-off-by: Julia Lawall <julia@xxxxxxx>
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/sparc/kernel/sun4d_irq.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN arch/sparc/kernel/sun4d_irq.c~arch-sparc-kernel-eliminate-what-looks-like-a-null-pointer-dereference arch/sparc/kernel/sun4d_irq.c
--- a/arch/sparc/kernel/sun4d_irq.c~arch-sparc-kernel-eliminate-what-looks-like-a-null-pointer-dereference
+++ a/arch/sparc/kernel/sun4d_irq.c
@@ -183,7 +183,7 @@ void sun4d_free_irq(unsigned int irq, vo
goto out_unlock;
}
- if (action && tmp)
+ if (tmp)
tmp->next = action->next;
else
*actionp = action->next;
_
Patches currently in -mm which might be from julia@xxxxxxx are
origin.patch
linux-next.patch
arch-x86-kernel-add-missing-spin_unlock.patch
arch-x86-kernel-add-missing-spin_unlock-fix2.patch
fs-btrfs-use-memdup_user.patch
fs-btrfs-use-err_cast.patch
drivers-media-use-memdup_user.patch
drivers-media-video-pvrusb2-add-missing-mutex_unlock.patch
drivers-video-omap2-displays-add-missing-mutex_unlock.patch
drivers-i2c-use-memdup_user.patch
arch-ia64-kvm-add-missing-spin_unlock.patch
drivers-ide-use-memdup_user.patch
fs-ubifs-use-err_cast.patch
drivers-net-wireless-prism54-use-memdup_user.patch
fs-ocfs2-dlm-add-missing-spin_unlock.patch
drivers-s390-net-use-memdup_user.patch
drivers-scsi-libsas-use-sam_good.patch
drivers-scsi-remove-unnecessary-null-test.patch
drivers-message-move-dereference-after-null-test.patch
drivers-scsi-correct-the-size-argument-to-kmalloc.patch
drivers-scsi-use-memdup_user.patch
drivers-block-use-memdup_user.patch
drivers-staging-dream-camera-use-memdup_user.patch
drivers-staging-vme-bridges-add-missing-unlocks.patch
drivers-usb-gadget-use-memdup_user.patch
mm-use-memdup_user.patch
mm-use-err_cast.patch
drivers-message-i2o-exec-osmc-add-missing-mutex_unlock.patch
drivers-char-n_gsmc-add-missing-spin_unlock_irqrestore.patch
drivers-usb-serial-eliminate-a-null-pointer-dereference.patch
arch-sparc-kernel-eliminate-what-looks-like-a-null-pointer-dereference.patch
drivers-dma-eliminate-a-null-pointer-dereference.patch
drivers-media-eliminate-a-null-pointer-dereference.patch
drivers-staging-eliminate-a-null-pointer-dereference.patch
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