{"id":"DEBIAN-CVE-2023-52484","details":"In the Linux kernel, the following vulnerability has been resolved:  iommu/arm-smmu-v3: Fix soft lockup triggered by arm_smmu_mm_invalidate_range  When running an SVA case, the following soft lockup is triggered: -------------------------------------------------------------------- watchdog: BUG: soft lockup - CPU#244 stuck for 26s! pstate: 83400009 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : arm_smmu_cmdq_issue_cmdlist+0x178/0xa50 lr : arm_smmu_cmdq_issue_cmdlist+0x150/0xa50 sp : ffff8000d83ef290 x29: ffff8000d83ef290 x28: 000000003b9aca00 x27: 0000000000000000 x26: ffff8000d83ef3c0 x25: da86c0812194a0e8 x24: 0000000000000000 x23: 0000000000000040 x22: ffff8000d83ef340 x21: ffff0000c63980c0 x20: 0000000000000001 x19: ffff0000c6398080 x18: 0000000000000000 x17: 0000000000000000 x16: 0000000000000000 x15: ffff3000b4a3bbb0 x14: ffff3000b4a30888 x13: ffff3000b4a3cf60 x12: 0000000000000000 x11: 0000000000000000 x10: 0000000000000000 x9 : ffffc08120e4d6bc x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000048cfa x5 : 0000000000000000 x4 : 0000000000000001 x3 : 000000000000000a x2 : 0000000080000000 x1 : 0000000000000000 x0 : 0000000000000001 Call trace:  arm_smmu_cmdq_issue_cmdlist+0x178/0xa50  __arm_smmu_tlb_inv_range+0x118/0x254  arm_smmu_tlb_inv_range_asid+0x6c/0x130  arm_smmu_mm_invalidate_range+0xa0/0xa4  __mmu_notifier_invalidate_range_end+0x88/0x120  unmap_vmas+0x194/0x1e0  unmap_region+0xb4/0x144  do_mas_align_munmap+0x290/0x490  do_mas_munmap+0xbc/0x124  __vm_munmap+0xa8/0x19c  __arm64_sys_munmap+0x28/0x50  invoke_syscall+0x78/0x11c  el0_svc_common.constprop.0+0x58/0x1c0  do_el0_svc+0x34/0x60  el0_svc+0x2c/0xd4  el0t_64_sync_handler+0x114/0x140  el0t_64_sync+0x1a4/0x1a8 --------------------------------------------------------------------  Note that since 6.6-rc1 the arm_smmu_mm_invalidate_range above is renamed to \"arm_smmu_mm_arch_invalidate_secondary_tlbs\", yet the problem remains.  The commit 06ff87bae8d3 (\"arm64: mm: remove unused functions and variable protoypes\") fixed a similar lockup on the CPU MMU side. Yet, it can occur to SMMU too, since arm_smmu_mm_arch_invalidate_secondary_tlbs() is called typically next to MMU tlb flush function, e.g. \ttlb_flush_mmu_tlbonly { \t\ttlb_flush { \t\t\t__flush_tlb_range { \t\t\t\t// check MAX_TLBI_OPS \t\t\t} \t\t} \t\tmmu_notifier_arch_invalidate_secondary_tlbs { \t\t\tarm_smmu_mm_arch_invalidate_secondary_tlbs { \t\t\t\t// does not check MAX_TLBI_OPS \t\t\t} \t\t} \t}  Clone a CMDQ_MAX_TLBI_OPS from the MAX_TLBI_OPS in tlbflush.h, since in an SVA case SMMU uses the CPU page table, so it makes sense to align with the tlbflush code. Then, replace per-page TLBI commands with a single per-asid TLBI command, if the request size hits this threshold.","modified":"2026-09-15T09:02:47.666407750Z","published":"2024-02-29T06:15:46.190Z","upstream":["CVE-2023-52484"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2023-52484"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.64-1"}]}],"versions":["6.1.27-1","6.1.37-1","6.1.38-1","6.1.38-2","6.1.38-2~bpo11+1","6.1.38-3","6.1.38-4","6.1.38-4~bpo11+1","6.1.52-1","6.1.55-1","6.1.55-1~bpo11+1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-52484.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.5.6-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-52484.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.5.6-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-52484.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}