cve-2024-26709
Vulnerability from cvelistv5
Published
2024-04-03 14:55
Modified
2024-12-19 08:45
Severity ?
Summary
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 <snip> 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 <SF,EE,ME,IR,DR,RI,LE> 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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0846dd77c8349ec92ca0079c9c71d130f34cb192Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c90fdea9cac9eb419fc266e75d625cb60c8f7f6cPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/0846dd77c8349ec92ca0079c9c71d130f34cb192Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/c90fdea9cac9eb419fc266e75d625cb60c8f7f6cPatch
Impacted products
Vendor Product Version
Linux Linux Version: a8ca9fc9134c1a43e6d4db7ff59496bbd7075def
Version: a8ca9fc9134c1a43e6d4db7ff59496bbd7075def
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   Linux Linux Version: 6.7
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