linux.git/kernel/irq/ipi.c, branch v6.12.80 Clone of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git genirq/ipi: Fix NULL pointer deref in irq_data_get_affinity_mask() 2023-02-20T12:53:41+00:00 Sergey Shtylyov s.shtylyov@omp.ru 2022-08-17T20:00:45+00:00 feabecaff5902f896531dde90646ca5dfa9d4f7d If ipi_send_{mask|single}() is called with an invalid interrupt number, all the local variables there will be NULL. ipi_send_verify() which is invoked from these functions does verify its 'data' parameter, resulting in a kernel oops in irq_data_get_affinity_mask() as the passed NULL pointer gets dereferenced. Add a missing NULL pointer check in ipi_send_verify()... Found by Linux Verification Center (linuxtesting.org) with the SVACE static analysis tool. Fixes: 3b8e29a82dd1 ("genirq: Implement ipi_send_mask/single()") Signed-off-by: Sergey Shtylyov <s.shtylyov@omp.ru> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/r/b541232d-c2b6-1fe9-79b4-a7129459e4d0@omp.ru 
If ipi_send_{mask|single}() is called with an invalid interrupt number, all
the local variables there will be NULL. ipi_send_verify() which is invoked
from these functions does verify its 'data' parameter, resulting in a
kernel oops in irq_data_get_affinity_mask() as the passed NULL pointer gets
dereferenced.

Add a missing NULL pointer check in ipi_send_verify()...

Found by Linux Verification Center (linuxtesting.org) with the SVACE static
analysis tool.

Fixes: 3b8e29a82dd1 ("genirq: Implement ipi_send_mask/single()")
Signed-off-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/b541232d-c2b6-1fe9-79b4-a7129459e4d0@omp.ru
genirq: Return a const cpumask from irq_data_get_affinity_mask 2022-07-07T08:38:04+00:00 Samuel Holland samuel@sholland.org 2022-07-01T20:00:55+00:00 4d0b8298818b623f5fa51d5c49e1a142d3618ac9 Now that the irq_data_update_affinity helper exists, enforce its use by returning a a const cpumask from irq_data_get_affinity_mask. Since the previous commit already updated places that needed to call irq_data_update_affinity, this commit updates the remaining code that either did not modify the cpumask or immediately passed the modified mask to irq_set_affinity. Signed-off-by: Samuel Holland <samuel@sholland.org> Reviewed-by: Michael Kelley <mikelley@microsoft.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20220701200056.46555-8-samuel@sholland.org 
Now that the irq_data_update_affinity helper exists, enforce its use
by returning a a const cpumask from irq_data_get_affinity_mask.

Since the previous commit already updated places that needed to call
irq_data_update_affinity, this commit updates the remaining code that
either did not modify the cpumask or immediately passed the modified
mask to irq_set_affinity.

Signed-off-by: Samuel Holland <samuel@sholland.org>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220701200056.46555-8-samuel@sholland.org
genirq: Fix kernel-doc warnings in pm.c, msi.c and ipi.c 2021-08-11T12:33:35+00:00 Randy Dunlap rdunlap@infradead.org 2021-08-10T23:48:35+00:00 3b35e7e6daef5a8b4819e2bd2d15898b9b4d1669 Fix all kernel-doc warnings in these 3 files and do some simple editing (capitalize acronyms, capitalize Linux). kernel/irq/pm.c:235: warning: expecting prototype for irq_pm_syscore_ops(). Prototype was for irq_pm_syscore_resume() instead kernel/irq/msi.c:530: warning: expecting prototype for __msi_domain_free_irqs(). Prototype was for msi_domain_free_irqs() instead kernel/irq/msi.c:31: warning: No description found for return value of 'alloc_msi_entry' kernel/irq/msi.c:103: warning: No description found for return value of 'msi_domain_set_affinity' kernel/irq/msi.c:288: warning: No description found for return value of 'msi_create_irq_domain' kernel/irq/msi.c:499: warning: No description found for return value of 'msi_domain_alloc_irqs' kernel/irq/msi.c:545: warning: No description found for return value of 'msi_get_domain_info' kernel/irq/ipi.c:264: warning: expecting prototype for ipi_send_mask(). Prototype was for __ipi_send_mask() instead kernel/irq/ipi.c:25: warning: No description found for return value of 'irq_reserve_ipi' kernel/irq/ipi.c:116: warning: No description found for return value of 'irq_destroy_ipi' kernel/irq/ipi.c:163: warning: No description found for return value of 'ipi_get_hwirq' kernel/irq/ipi.c:222: warning: No description found for return value of '__ipi_send_single' kernel/irq/ipi.c:308: warning: No description found for return value of 'ipi_send_single' kernel/irq/ipi.c:329: warning: No description found for return value of 'ipi_send_mask' Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/r/20210810234835.12547-1-rdunlap@infradead.org 
Fix all kernel-doc warnings in these 3 files and do some simple editing
(capitalize acronyms, capitalize Linux).

kernel/irq/pm.c:235: warning: expecting prototype for irq_pm_syscore_ops(). Prototype was for irq_pm_syscore_resume() instead
kernel/irq/msi.c:530: warning: expecting prototype for __msi_domain_free_irqs(). Prototype was for msi_domain_free_irqs() instead
kernel/irq/msi.c:31: warning: No description found for return value of 'alloc_msi_entry'
kernel/irq/msi.c:103: warning: No description found for return value of 'msi_domain_set_affinity'
kernel/irq/msi.c:288: warning: No description found for return value of 'msi_create_irq_domain'
kernel/irq/msi.c:499: warning: No description found for return value of 'msi_domain_alloc_irqs'
kernel/irq/msi.c:545: warning: No description found for return value of 'msi_get_domain_info'
kernel/irq/ipi.c:264: warning: expecting prototype for ipi_send_mask(). Prototype was for __ipi_send_mask() instead
kernel/irq/ipi.c:25: warning: No description found for return value of 'irq_reserve_ipi'
kernel/irq/ipi.c:116: warning: No description found for return value of 'irq_destroy_ipi'
kernel/irq/ipi.c:163: warning: No description found for return value of 'ipi_get_hwirq'
kernel/irq/ipi.c:222: warning: No description found for return value of '__ipi_send_single'
kernel/irq/ipi.c:308: warning: No description found for return value of 'ipi_send_single'
kernel/irq/ipi.c:329: warning: No description found for return value of 'ipi_send_mask'

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20210810234835.12547-1-rdunlap@infradead.org
genirq: Fix typos and misspellings in comments 2021-03-16T14:08:29+00:00 Krzysztof Kozlowski krzysztof.kozlowski@canonical.com 2021-03-16T10:02:05+00:00 5c982c58752118b6c1f295024d3fda5ff22d3c52 No functional change. Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/r/20210316100205.23492-1-krzysztof.kozlowski@canonical.com 
No functional change.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20210316100205.23492-1-krzysztof.kozlowski@canonical.com
genirq: Fix various typos in comments 2018-12-18T13:22:28+00:00 Ingo Molnar mingo@kernel.org 2018-12-03T10:44:51+00:00 c5f48c0a7aa1a8c82d81cdf27e63aa0a5544c6e6 Go over the IRQ subsystem source code (including irqchip drivers) and fix common typos in comments. No change in functionality intended. Signed-off-by: Ingo Molnar <mingo@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: linux-kernel@vger.kernel.org 
Go over the IRQ subsystem source code (including irqchip drivers) and
fix common typos in comments.

No change in functionality intended.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org
genirq: Add missing SPDX identifiers 2018-03-20T13:23:28+00:00 Thomas Gleixner tglx@linutronix.de 2018-03-14T21:15:19+00:00 52a65ff5603e685e9b19c2e108b3f0826dc7a86b Add SPDX identifiers to files - which contain an explicit license boiler plate or reference - which do not contain a license reference and were not updated in the initial SPDX conversion because the license was deduced by the scanners via EXPORT_SYMBOL_GPL as GPL2.0 only. [ tglx: Moved adding identifiers from the patch which removes the references/boilerplate ] Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Kate Stewart <kstewart@linuxfoundation.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Philippe Ombredanne <pombredanne@nexb.com> Link: https://lkml.kernel.org/r/20180314212030.668321222@linutronix.de 
Add SPDX identifiers to files

 - which contain an explicit license boiler plate or reference

 - which do not contain a license reference and were not updated in the
   initial SPDX conversion because the license was deduced by the scanners
   via EXPORT_SYMBOL_GPL as GPL2.0 only.

[ tglx: Moved adding identifiers from the patch which removes the
  	references/boilerplate ]

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Kate Stewart <kstewart@linuxfoundation.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Philippe Ombredanne <pombredanne@nexb.com>
Link: https://lkml.kernel.org/r/20180314212030.668321222@linutronix.de
genirq: Cleanup top of file comments 2018-03-20T13:23:27+00:00 Thomas Gleixner tglx@linutronix.de 2018-03-14T21:15:16+00:00 99bfce5db9c071800bdc7e9658a68e6d11aeecf6 Remove pointless references to the file name itself and condense the information so it wastes less space. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Marc Zyngier <marc.zyngier@arm.com> Cc: Kate Stewart <kstewart@linuxfoundation.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Philippe Ombredanne <pombredanne@nexb.com> Link: https://lkml.kernel.org/r/20180314212030.412095827@linutronix.de 
Remove pointless references to the file name itself and condense the
information so it wastes less space.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Cc: Kate Stewart <kstewart@linuxfoundation.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Philippe Ombredanne <pombredanne@nexb.com>
Link: https://lkml.kernel.org/r/20180314212030.412095827@linutronix.de
genirq/ipi: Fixup checks against nr_cpu_ids 2017-08-20T08:49:05+00:00 Alexey Dobriyan adobriyan@gmail.com 2017-08-19T09:57:51+00:00 8fbbe2d7cc478d1544f41f2271787c993c23a4f6 Valid CPU ids are [0, nr_cpu_ids-1] inclusive. Fixes: 3b8e29a82dd1 ("genirq: Implement ipi_send_mask/single()") Fixes: f9bce791ae2a ("genirq: Add a new function to get IPI reverse mapping") Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: stable@vger.kernel.org Link: http://lkml.kernel.org/r/20170819095751.GB27864@avx2 
Valid CPU ids are [0, nr_cpu_ids-1] inclusive.

Fixes: 3b8e29a82dd1 ("genirq: Implement ipi_send_mask/single()")
Fixes: f9bce791ae2a ("genirq: Add a new function to get IPI reverse mapping")
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/20170819095751.GB27864@avx2
genirq: Fix missing irq allocation affinity hint 2016-07-19T08:49:47+00:00 Vincent Stehle vincent.stehle@laposte.net 2016-07-18T20:56:26+00:00 eb0dc47ab6810c432e8193beccd9905ba0db8b22 The new affinity hint argument of __irq_domain_alloc_irqs() is missing in irq_reserve_ipi(). Add it. This fixes the following compilation error: kernel/irq/ipi.c: In function ‘irq_reserve_ipi’: kernel/irq/ipi.c:85:9: error: too few arguments to function ‘__irq_domain_alloc_irqs’ virq = __irq_domain_alloc_irqs(domain, virq, nr_irqs, NUMA_NO_NODE, ^ Fixes: 06ee6d571f0e ("genirq: Add affinity hint to irq allocation") Signed-off-by: Vincent Stehlé <vincent.stehle@laposte.net> Cc: linux-pci@vger.kernel.org Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> 
The new affinity hint argument of __irq_domain_alloc_irqs() is missing in
irq_reserve_ipi(). Add it.

This fixes the following compilation error:

  kernel/irq/ipi.c: In function ‘irq_reserve_ipi’:
  kernel/irq/ipi.c:85:9: error: too few arguments to function ‘__irq_domain_alloc_irqs’
    virq = __irq_domain_alloc_irqs(domain, virq, nr_irqs, NUMA_NO_NODE,
           ^
Fixes: 06ee6d571f0e ("genirq: Add affinity hint to irq allocation")
Signed-off-by: Vincent Stehlé <vincent.stehle@laposte.net>
Cc: linux-pci@vger.kernel.org
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
genirq: Add affinity hint to irq allocation 2016-07-04T10:25:13+00:00 Thomas Gleixner tglx@linutronix.de 2016-07-04T08:39:24+00:00 06ee6d571f0e350253a8fc3492316b2be007fae2 Add an extra argument to the irq(domain) allocation functions, so we can hand down affinity hints to the allocator. Thats necessary to implement proper support for multiqueue devices. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Christoph Hellwig <hch@lst.de> Cc: linux-block@vger.kernel.org Cc: linux-pci@vger.kernel.org Cc: linux-nvme@lists.infradead.org Cc: axboe@fb.com Cc: agordeev@redhat.com Link: http://lkml.kernel.org/r/1467621574-8277-4-git-send-email-hch@lst.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de> 
Add an extra argument to the irq(domain) allocation functions, so we can hand
down affinity hints to the allocator. Thats necessary to implement proper
support for multiqueue devices.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Christoph Hellwig <hch@lst.de>
Cc: linux-block@vger.kernel.org
Cc: linux-pci@vger.kernel.org
Cc: linux-nvme@lists.infradead.org
Cc: axboe@fb.com
Cc: agordeev@redhat.com
Link: http://lkml.kernel.org/r/1467621574-8277-4-git-send-email-hch@lst.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>