genirq/ipi: Fix NULL pointer deref in irq_data_get_affinity_mask()

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[ Upstream commit feabecaff5 ]

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: 3b8e29a82d ("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
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Sergey Shtylyov 2022-08-17 23:00:45 +03:00 • committed by Greg Kroah-Hartman

parent 9425d1ee2c

commit 926aef60ea

1 changed files with 6 additions and 2 deletions

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kernel/irq/ipi.c

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