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| author | Robin Murphy <robin.murphy@arm.com> | 2023-11-15 21:25:44 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-12-08 10:52:19 +0300 |
| commit | c1114090cebd788989edfc786a7632891b4f7efb (patch) | |
| tree | 52fa2f412faaf9182e873915f3dd9effd54f9123 /drivers/md | |
| parent | b797b7f83e537875cf22b89f673baee492407589 (diff) | |
| download | linux-c1114090cebd788989edfc786a7632891b4f7efb.tar.xz | |
iommu: Avoid more races around device probe
commit a2e7e59a94269484a83386972ca07c22fd188854 upstream.
It turns out there are more subtle races beyond just the main part of
__iommu_probe_device() itself running in parallel - the dev_iommu_free()
on the way out of an unsuccessful probe can still manage to trip up
concurrent accesses to a device's fwspec. Thus, extend the scope of
iommu_probe_device_lock() to also serialise fwspec creation and initial
retrieval.
Reported-by: Zhenhua Huang <quic_zhenhuah@quicinc.com>
Link: https://lore.kernel.org/linux-iommu/e2e20e1c-6450-4ac5-9804-b0000acdf7de@quicinc.com/
Fixes: 01657bc14a39 ("iommu: Avoid races around device probe")
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: André Draszik <andre.draszik@linaro.org>
Tested-by: André Draszik <andre.draszik@linaro.org>
Link: https://lore.kernel.org/r/16f433658661d7cadfea51e7c65da95826112a2b.1700071477.git.robin.murphy@arm.com
Cc: stable@vger.kernel.org
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/md')
0 files changed, 0 insertions, 0 deletions