The patch titled
genirq: NULL struct irq_desc's member 'name' in dynamic_irq_cleanup()
has been removed from the -mm tree. Its filename was
genirq-null-struct-irq_descs-member-name-in-dynamic_irq_cleanup.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: genirq: NULL struct irq_desc's member 'name' in dynamic_irq_cleanup()
From: Dean Nelson <dcn@xxxxxxx>
If the member 'name' of the irq_desc structure happens to point to a
character string that is resident within a kernel module, problems ensue
if that module is rmmod'd (at which time dynamic_irq_cleanup() is called)
and then later show_interrupts() is called by someone.
It is also not a good thing if the character string resided in kmalloc'd
space that has been kfree'd (after having called dynamic_irq_cleanup()).
dynamic_irq_cleanup() fails to NULL the 'name' member and
show_interrupts() references it on a few architectures (like h8300, sh and
x86).
Signed-off-by: Dean Nelson <dcn@xxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/irq/chip.c | 1 +
1 file changed, 1 insertion(+)
diff -puN kernel/irq/chip.c~genirq-null-struct-irq_descs-member-name-in-dynamic_irq_cleanup kernel/irq/chip.c
--- a/kernel/irq/chip.c~genirq-null-struct-irq_descs-member-name-in-dynamic_irq_cleanup
+++ a/kernel/irq/chip.c
@@ -78,6 +78,7 @@ void dynamic_irq_cleanup(unsigned int ir
desc->chip_data = NULL;
desc->handle_irq = handle_bad_irq;
desc->chip = &no_irq_chip;
+ desc->name = NULL;
spin_unlock_irqrestore(&desc->lock, flags);
}
_
Patches currently in -mm which might be from dcn@xxxxxxx are
origin.patch
linux-next.patch
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