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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2024-05-25 14:48:40 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2024-05-25 14:48:40 -0700 |
| commit | a0db36ed571397df9a3f507ee19913a74d4b97a5 (patch) | |
| tree | 313ea73feafb073652a84051a6b9c349f6ac6c6c /kernel | |
| parent | 3a390f24b77328395cb7dfe05739889aff6897a6 (diff) | |
| parent | b84a8aba806261d2f759ccedf4a2a6a80a5e55ba (diff) | |
| download | linux-stable-a0db36ed571397df9a3f507ee19913a74d4b97a5.tar.gz linux-stable-a0db36ed571397df9a3f507ee19913a74d4b97a5.tar.bz2 linux-stable-a0db36ed571397df9a3f507ee19913a74d4b97a5.zip | |
Merge tag 'irq-urgent-2024-05-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq fixes from Ingo Molnar:
- Fix x86 IRQ vector leak caused by a CPU offlining race
- Fix build failure in the riscv-imsic irqchip driver
caused by an API-change semantic conflict
- Fix use-after-free in irq_find_at_or_after()
* tag 'irq-urgent-2024-05-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
genirq/irqdesc: Prevent use-after-free in irq_find_at_or_after()
genirq/cpuhotplug, x86/vector: Prevent vector leak during CPU offline
irqchip/riscv-imsic: Fixup riscv_ipi_set_virq_range() conflict
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/irq/cpuhotplug.c | 16 | ||||
| -rw-r--r-- | kernel/irq/irqdesc.c | 5 |
2 files changed, 12 insertions, 9 deletions
diff --git a/kernel/irq/cpuhotplug.c b/kernel/irq/cpuhotplug.c index 75cadbc3c232..eb8628390156 100644 --- a/kernel/irq/cpuhotplug.c +++ b/kernel/irq/cpuhotplug.c @@ -70,6 +70,14 @@ static bool migrate_one_irq(struct irq_desc *desc) } /* + * Complete an eventually pending irq move cleanup. If this + * interrupt was moved in hard irq context, then the vectors need + * to be cleaned up. It can't wait until this interrupt actually + * happens and this CPU was involved. + */ + irq_force_complete_move(desc); + + /* * No move required, if: * - Interrupt is per cpu * - Interrupt is not started @@ -88,14 +96,6 @@ static bool migrate_one_irq(struct irq_desc *desc) } /* - * Complete an eventually pending irq move cleanup. If this - * interrupt was moved in hard irq context, then the vectors need - * to be cleaned up. It can't wait until this interrupt actually - * happens and this CPU was involved. - */ - irq_force_complete_move(desc); - - /* * If there is a setaffinity pending, then try to reuse the pending * mask, so the last change of the affinity does not get lost. If * there is no move pending or the pending mask does not contain diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c index 88ac3652fcf2..07e99c936ba5 100644 --- a/kernel/irq/irqdesc.c +++ b/kernel/irq/irqdesc.c @@ -160,7 +160,10 @@ static int irq_find_free_area(unsigned int from, unsigned int cnt) static unsigned int irq_find_at_or_after(unsigned int offset) { unsigned long index = offset; - struct irq_desc *desc = mt_find(&sparse_irqs, &index, nr_irqs); + struct irq_desc *desc; + + guard(rcu)(); + desc = mt_find(&sparse_irqs, &index, nr_irqs); return desc ? irq_desc_get_irq(desc) : nr_irqs; } |