mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-12 05:48:40 +00:00
![]() The drhd and device scope list should be iterated with the
iommu global lock held. Otherwise, a suspicious RCU usage
message will be displayed.
[ 3.695886] =============================
[ 3.695917] WARNING: suspicious RCU usage
[ 3.695950] 5.2.0-rc2+ #2467 Not tainted
[ 3.695981] -----------------------------
[ 3.696014] drivers/iommu/intel-iommu.c:4569 suspicious rcu_dereference_check() usage!
[ 3.696069]
other info that might help us debug this:
[ 3.696126]
rcu_scheduler_active = 2, debug_locks = 1
[ 3.696173] no locks held by swapper/0/1.
[ 3.696204]
stack backtrace:
[ 3.696241] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.2.0-rc2+ #2467
[ 3.696370] Call Trace:
[ 3.696404] dump_stack+0x85/0xcb
[ 3.696441] intel_iommu_init+0x128c/0x13ce
[ 3.696478] ? kmem_cache_free+0x16b/0x2c0
[ 3.696516] ? __fput+0x14b/0x270
[ 3.696550] ? __call_rcu+0xb7/0x300
[ 3.696583] ? get_max_files+0x10/0x10
[ 3.696631] ? set_debug_rodata+0x11/0x11
[ 3.696668] ? e820__memblock_setup+0x60/0x60
[ 3.696704] ? pci_iommu_init+0x16/0x3f
[ 3.696737] ? set_debug_rodata+0x11/0x11
[ 3.696770] pci_iommu_init+0x16/0x3f
[ 3.696805] do_one_initcall+0x5d/0x2e4
[ 3.696844] ? set_debug_rodata+0x11/0x11
[ 3.696880] ? rcu_read_lock_sched_held+0x6b/0x80
[ 3.696924] kernel_init_freeable+0x1f0/0x27c
[ 3.696961] ? rest_init+0x260/0x260
[ 3.696997] kernel_init+0xa/0x110
[ 3.697028] ret_from_fork+0x3a/0x50
Fixes:
|
||
---|---|---|
.. | ||
amd_iommu.c | ||
amd_iommu_debugfs.c | ||
amd_iommu_init.c | ||
amd_iommu_proto.h | ||
amd_iommu_types.h | ||
amd_iommu_v2.c | ||
arm-smmu-regs.h | ||
arm-smmu-v3.c | ||
arm-smmu.c | ||
dma-iommu.c | ||
dmar.c | ||
exynos-iommu.c | ||
fsl_pamu.c | ||
fsl_pamu.h | ||
fsl_pamu_domain.c | ||
fsl_pamu_domain.h | ||
hyperv-iommu.c | ||
intel-iommu-debugfs.c | ||
intel-iommu.c | ||
intel-pasid.c | ||
intel-pasid.h | ||
intel-svm.c | ||
intel_irq_remapping.c | ||
io-pgtable-arm-v7s.c | ||
io-pgtable-arm.c | ||
io-pgtable.c | ||
iommu-debugfs.c | ||
iommu-sysfs.c | ||
iommu-traces.c | ||
iommu.c | ||
iova.c | ||
ipmmu-vmsa.c | ||
irq_remapping.c | ||
irq_remapping.h | ||
Kconfig | ||
Makefile | ||
msm_iommu.c | ||
msm_iommu.h | ||
msm_iommu_hw-8xxx.h | ||
mtk_iommu.c | ||
mtk_iommu.h | ||
mtk_iommu_v1.c | ||
of_iommu.c | ||
omap-iommu-debug.c | ||
omap-iommu.c | ||
omap-iommu.h | ||
omap-iopgtable.h | ||
qcom_iommu.c | ||
rockchip-iommu.c | ||
s390-iommu.c | ||
tegra-gart.c | ||
tegra-smmu.c |