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| author | Dean Nelson <dcn@sgi.com> | 2008-10-18 16:06:56 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-10-21 15:59:21 +0200 |
| commit | b6f3b7803a9231eddc36d0a2a6d2d8105ef89344 (patch) | |
| tree | ac5149f718d8c6c0692daa973632f3538253c31c /kernel/irq | |
| parent | e9f95e637320efe1936b647308ddf4ec5b8e0311 (diff) | |
| download | linux-b6f3b7803a9231eddc36d0a2a6d2d8105ef89344.tar.gz linux-b6f3b7803a9231eddc36d0a2a6d2d8105ef89344.tar.bz2 linux-b6f3b7803a9231eddc36d0a2a6d2d8105ef89344.zip | |
genirq: NULL struct irq_desc's member 'name' in dynamic_irq_cleanup()
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@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/irq')
| -rw-r--r-- | kernel/irq/chip.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c index 3de6ea3ee740..10b5092e9bfe 100644 --- a/kernel/irq/chip.c +++ b/kernel/irq/chip.c @@ -76,6 +76,7 @@ void dynamic_irq_cleanup(unsigned int irq) desc->chip_data = NULL; desc->handle_irq = handle_bad_irq; desc->chip = &no_irq_chip; + desc->name = NULL; spin_unlock_irqrestore(&desc->lock, flags); } |