{"id":"DEBIAN-CVE-2025-38029","details":"In the Linux kernel, the following vulnerability has been resolved:  kasan: avoid sleepable page allocation from atomic context  apply_to_pte_range() enters the lazy MMU mode and then invokes kasan_populate_vmalloc_pte() callback on each page table walk iteration.  However, the callback can go into sleep when trying to allocate a single page, e.g.  if an architecutre disables preemption on lazy MMU mode enter.  On s390 if make arch_enter_lazy_mmu_mode() -\u003e preempt_enable() and arch_leave_lazy_mmu_mode() -\u003e preempt_disable(), such crash occurs:  [    0.663336] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:321 [    0.663348] in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 2, name: kthreadd [    0.663358] preempt_count: 1, expected: 0 [    0.663366] RCU nest depth: 0, expected: 0 [    0.663375] no locks held by kthreadd/2. [    0.663383] Preemption disabled at: [    0.663386] [\u003c0002f3284cbb4eda\u003e] apply_to_pte_range+0xfa/0x4a0 [    0.663405] CPU: 0 UID: 0 PID: 2 Comm: kthreadd Not tainted 6.15.0-rc5-gcc-kasan-00043-gd76bb1ebb558-dirty #162 PREEMPT [    0.663408] Hardware name: IBM 3931 A01 701 (KVM/Linux) [    0.663409] Call Trace: [    0.663410]  [\u003c0002f3284c385f58\u003e] dump_stack_lvl+0xe8/0x140 [    0.663413]  [\u003c0002f3284c507b9e\u003e] __might_resched+0x66e/0x700 [    0.663415]  [\u003c0002f3284cc4f6c0\u003e] __alloc_frozen_pages_noprof+0x370/0x4b0 [    0.663419]  [\u003c0002f3284ccc73c0\u003e] alloc_pages_mpol+0x1a0/0x4a0 [    0.663421]  [\u003c0002f3284ccc8518\u003e] alloc_frozen_pages_noprof+0x88/0xc0 [    0.663424]  [\u003c0002f3284ccc8572\u003e] alloc_pages_noprof+0x22/0x120 [    0.663427]  [\u003c0002f3284cc341ac\u003e] get_free_pages_noprof+0x2c/0xc0 [    0.663429]  [\u003c0002f3284cceba70\u003e] kasan_populate_vmalloc_pte+0x50/0x120 [    0.663433]  [\u003c0002f3284cbb4ef8\u003e] apply_to_pte_range+0x118/0x4a0 [    0.663435]  [\u003c0002f3284cbc7c14\u003e] apply_to_pmd_range+0x194/0x3e0 [    0.663437]  [\u003c0002f3284cbc99be\u003e] __apply_to_page_range+0x2fe/0x7a0 [    0.663440]  [\u003c0002f3284cbc9e88\u003e] apply_to_page_range+0x28/0x40 [    0.663442]  [\u003c0002f3284ccebf12\u003e] kasan_populate_vmalloc+0x82/0xa0 [    0.663445]  [\u003c0002f3284cc1578c\u003e] alloc_vmap_area+0x34c/0xc10 [    0.663448]  [\u003c0002f3284cc1c2a6\u003e] __get_vm_area_node+0x186/0x2a0 [    0.663451]  [\u003c0002f3284cc1e696\u003e] __vmalloc_node_range_noprof+0x116/0x310 [    0.663454]  [\u003c0002f3284cc1d950\u003e] __vmalloc_node_noprof+0xd0/0x110 [    0.663457]  [\u003c0002f3284c454b88\u003e] alloc_thread_stack_node+0xf8/0x330 [    0.663460]  [\u003c0002f3284c458d56\u003e] dup_task_struct+0x66/0x4d0 [    0.663463]  [\u003c0002f3284c45be90\u003e] copy_process+0x280/0x4b90 [    0.663465]  [\u003c0002f3284c460940\u003e] kernel_clone+0xd0/0x4b0 [    0.663467]  [\u003c0002f3284c46115e\u003e] kernel_thread+0xbe/0xe0 [    0.663469]  [\u003c0002f3284c4e440e\u003e] kthreadd+0x50e/0x7f0 [    0.663472]  [\u003c0002f3284c38c04a\u003e] __ret_from_fork+0x8a/0xf0 [    0.663475]  [\u003c0002f3284ed57ff2\u003e] ret_from_fork+0xa/0x38  Instead of allocating single pages per-PTE, bulk-allocate the shadow memory prior to applying kasan_populate_vmalloc_pte() callback on a page range.","modified":"2026-09-01T16:06:13.435123165Z","published":"2025-06-18T10:15:34.970Z","upstream":["CVE-2025-38029"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2025-38029"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.1.106-1","6.1.106-2","6.1.106-3","6.1.112-1","6.1.115-1","6.1.119-1","6.1.123-1","6.1.124-1","6.1.128-1","6.1.129-1","6.1.133-1","6.1.135-1","6.1.137-1","6.1.139-1","6.1.140-1","6.1.147-1","6.1.148-1","6.1.153-1","6.1.158-1","6.1.159-1","6.1.162-1","6.1.164-1","6.1.170-1","6.1.170-2","6.1.170-3","6.1.172-1","6.1.174-1","6.1.176-1","6.1.177-1","6.1.180-1","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","6.1.64-1","6.1.66-1","6.1.67-1","6.1.69-1","6.1.69-1~bpo11+1","6.1.76-1","6.1.76-1~bpo11+1","6.1.82-1","6.1.85-1","6.1.90-1","6.1.90-1~bpo11+1","6.1.94-1","6.1.94-1~bpo11+1","6.1.98-1","6.1.99-1","6.10-1~exp1","6.10.1-1~exp1","6.10.11-1","6.10.11-1~bpo12+1","6.10.12-1","6.10.3-1","6.10.4-1","6.10.6-1","6.10.6-1~bpo12+1","6.10.7-1","6.10.9-1","6.11-1~exp1","6.11.10-1","6.11.10-1~bpo12+1","6.11.2-1","6.11.4-1","6.11.5-1","6.11.5-1~bpo12+1","6.11.6-1","6.11.7-1","6.11.9-1","6.11~rc4-1~exp1","6.11~rc5-1~exp1","6.12.10-1","6.12.100-1","6.12.101-1","6.12.105-1","6.12.107-1","6.12.11-1","6.12.11-1+alpha","6.12.11-1+alpha.1","6.12.12-1","6.12.12-1~bpo12+1","6.12.13-1","6.12.15-1","6.12.16-1","6.12.17-1","6.12.19-1","6.12.20-1","6.12.21-1","6.12.22-1","6.12.22-1~bpo12+1","6.12.25-1","6.12.27-1","6.12.27-1~bpo12+1","6.12.29-1","6.12.3-1","6.12.30-1","6.12.30-1~bpo12+1","6.12.31-1","6.12.32-1","6.12.32-1~bpo12+1","6.12.33-1","6.12.33-1~bpo12+1","6.12.35-1","6.12.35-1~bpo12+1","6.12.37-1","6.12.38-1","6.12.38-1~bpo12+1","6.12.41-1","6.12.43-1","6.12.43-1~bpo12+1","6.12.48-1","6.12.5-1","6.12.57-1","6.12.57-1~bpo12+1","6.12.6-1","6.12.63-1","6.12.63-1~bpo12+1","6.12.69-1","6.12.69-1~bpo12+1","6.12.73-1","6.12.73-1~bpo12+1","6.12.74-1","6.12.74-2","6.12.74-2~bpo12+1","6.12.8-1","6.12.85-1","6.12.85-1~bpo12+1","6.12.86-1","6.12.86-1~bpo12+1","6.12.88-1","6.12.88-1~bpo12+1","6.12.9-1","6.12.9-1+alpha","6.12.9-1~bpo12+1","6.12.90-1","6.12.90-1~bpo12+1","6.12.90-2","6.12.90-2~bpo12+1","6.12.94-1","6.12.94-1~bpo12+1","6.12.95-1","6.12.95-1~bpo12+1","6.12.96-1","6.12~rc6-1~exp1","6.13.10-1~exp1","6.13.11-1~exp1","6.13.2-1~exp1","6.13.3-1~exp1","6.13.4-1~exp1","6.13.5-1~exp1","6.13.6-1~exp1","6.13.7-1~exp1","6.13.8-1~exp1","6.13.9-1~exp1","6.13~rc6-1~exp1","6.13~rc7-1~exp1","6.14.3-1~exp1","6.14.5-1~exp1","6.14.6-1~exp1","6.15-1~exp1","6.15.1-1~exp1","6.15.2-1~exp1","6.15.3-1~exp1","6.15.4-1~exp1","6.15.5-1~exp1","6.15.6-1~exp1","6.15~rc7-1~exp1","6.16-1~exp1","6.16.1-1~exp1","6.16.10-1","6.16.11-1","6.16.12-1","6.16.12-1~bpo13+1","6.16.12-2","6.16.3-1","6.16.3-1~bpo13+1","6.16.5-1","6.16.6-1","6.16.7-1","6.16.8-1","6.16.9-1","6.16~rc7-1~exp1","6.17.10-1","6.17.11-1","6.17.12-1","6.17.13-1","6.17.13-1~bpo13+1","6.17.2-1~exp1","6.17.5-1~exp1","6.17.6-1","6.17.7-1","6.17.7-2","6.17.8-1","6.17.8-1~bpo13+1","6.17.9-1","6.18.1-1~exp1","6.18.10-1","6.18.12-1","6.18.12-1~bpo13+1","6.18.13-1","6.18.14-1","6.18.15-1","6.18.15-1~bpo13+1","6.18.2-1~exp1","6.18.3-1","6.18.5-1","6.18.5-1~bpo13+1","6.18.8-1","6.18.9-1","6.18.9-1~bpo13+1","6.18~rc4-1~exp1","6.18~rc4-1~exp2","6.18~rc5-1~exp1","6.18~rc6-1~exp1","6.18~rc7-1~exp1","6.19-1~exp1","6.19.10-1","6.19.10-1~bpo13+1","6.19.11-1","6.19.11-1~bpo13+1","6.19.12-1","6.19.13-1","6.19.13-1~bpo13+1","6.19.14-1","6.19.14-1~bpo13+1","6.19.2-1~exp1","6.19.3-1~exp1","6.19.4-1~exp1","6.19.5-1~exp1","6.19.6-1","6.19.6-2","6.19.6-2~bpo13+1","6.19.8-1","6.19.8-1~bpo13+1","6.19~rc4-1~exp1","6.19~rc5-1~exp1","6.19~rc6-1~exp1","6.19~rc7-1~exp1","6.19~rc8-1~exp1","6.3.1-1~exp1","6.3.11-1","6.3.2-1~exp1","6.3.4-1~exp1","6.3.5-1~exp1","6.3.7-1","6.3.7-1~bpo12+1","6.4.1-1~exp1","6.4.11-1","6.4.13-1","6.4.4-1","6.4.4-1~bpo12+1","6.4.4-2","6.4.4-3","6.4.4-3~bpo12+1","6.4~rc6-1~exp1","6.4~rc7-1~exp1","6.5.1-1~exp1","6.5.10-1","6.5.10-1~bpo12+1","6.5.13-1","6.5.3-1","6.5.3-1~bpo12+1","6.5.6-1","6.5.8-1","6.5~rc4-1~exp1","6.5~rc6-1~exp1","6.5~rc7-1~exp1","6.6.11-1","6.6.13-1","6.6.13-1~bpo12+1","6.6.15-1","6.6.15-2","6.6.3-1~exp1","6.6.4-1~exp1","6.6.7-1~exp1","6.6.8-1","6.6.9-1","6.7-1~exp1","6.7.1-1~exp1","6.7.12-1","6.7.12-1~bpo12+1","6.7.4-1~exp1","6.7.7-1","6.7.9-1","6.7.9-2","6.8.11-1","6.8.12-1","6.8.12-1~bpo12+1","6.8.9-1","6.9.10-1","6.9.10-1~bpo12+1","6.9.11-1","6.9.12-1","6.9.2-1~exp1","6.9.7-1","6.9.7-1~bpo12+1","6.9.8-1","6.9.9-1","7.0-1~exp1","7.0.1-1~exp1","7.0.10-1","7.0.10-1~bpo13+1","7.0.12-1","7.0.12-2","7.0.12-2~bpo13+1","7.0.13-1","7.0.13-1~bpo13+1","7.0.14-1","7.0.3-1","7.0.4-1","7.0.4-1~bpo13+1","7.0.7-1","7.0.7-1~bpo13+1","7.0.9-1","7.0.9-1~bpo13+1","7.1.1-1~exp1","7.1.10-1","7.1.12-1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