CVE-2024-26709: In the Linux kernel, the following vulnerability has been resolved: powerpc/iommu: Fix the missing iommu_group_put() during platform domain attach The function…

PriorityP419medium5.5CVSS 3.1

AVLACLPRLUINSUCNINAH

EPSS

0.19%

9.4th percentile

In the Linux kernel, the following vulnerability has been resolved: powerpc/iommu: Fix the missing iommu_group_put() during platform domain attach The function spapr_tce_platform_iommu_attach_dev() is missing to call iommu_group_put() when the domain is already set. This refcount leak shows up with BUG_ON() during DLPAR remove operation as: KernelBug: Kernel bug in state 'None': kernel BUG at arch/powerpc/platforms/pseries/iommu.c:100! Oops: Exception in kernel mode, sig: 5 [#1] LE PAGE_SIZE=64K MMU=Radix SMP NR_CPUS=8192 NUMA pSeries Hardware name: IBM,9080-HEX POWER10 (raw) 0x800200 0xf000006 of:IBM,FW1060.00 (NH1060_016) hv:phyp pSeries NIP: c0000000000ff4d4 LR: c0000000000ff4cc CTR: 0000000000000000 REGS: c0000013aed5f840 TRAP: 0700 Tainted: G I (6.8.0-rc3-autotest-g99bd3cb0d12e) MSR: 8000000000029033 CR: 44002402 XER: 20040000 CFAR: c000000000a0d170 IRQMASK: 0 ... NIP iommu_reconfig_notifier+0x94/0x200 LR iommu_reconfig_notifier+0x8c/0x200 Call Trace: iommu_reconfig_notifier+0x8c/0x200 (unreliable) notifier_call_chain+0xb8/0x19c blocking_notifier_call_chain+0x64/0x98 of_reconfig_notify+0x44/0xdc of_detach_node+0x78/0xb0 ofdt_write.part.0+0x86c/0xbb8 proc_reg_write+0xf4/0x150 vfs_write+0xf8/0x488 ksys_write+0x84/0x140 system_call_exception+0x138/0x330 system_call_vectored_common+0x15c/0x2ec The patch adds the missing iommu_group_put() call.

Affected

8 ranges

Vendor	Product	Version range	Fixed in
debian	linux	< linux 6.7.7-1 (forky)	linux 6.7.7-1 (forky)
linux	linux	—	—
linux	linux	>= a8ca9fc9134c1a43e6d4db7ff59496bbd7075def < c90fdea9cac9eb419fc266e75d625cb60c8f7f6c	c90fdea9cac9eb419fc266e75d625cb60c8f7f6c
linux	linux	>= a8ca9fc9134c1a43e6d4db7ff59496bbd7075def < 0846dd77c8349ec92ca0079c9c71d130f34cb192	0846dd77c8349ec92ca0079c9c71d130f34cb192
linux	linux_kernel	—	—
linux	linux_kernel	>= 0 < 6.7.7-1	6.7.7-1
linux	linux_kernel	>= 0 < 6.7.7-1	6.7.7-1
linux	linux_kernel	>= 6.7 < 6.7.6	6.7.6

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

osv5.5MEDIUM

vendor_debian5.5LOW

vendor_redhat5.5MEDIUM

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