{ "containers": { "cna": { "providerMetadata": { "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndma-debug: don't call __dma_entry_alloc_check_leak() under free_entries_lock\n\n__dma_entry_alloc_check_leak() calls into printk -> serial console\noutput (qcom geni) and grabs port->lock under free_entries_lock\nspin lock, which is a reverse locking dependency chain as qcom_geni\nIRQ handler can call into dma-debug code and grab free_entries_lock\nunder port->lock.\n\nMove __dma_entry_alloc_check_leak() call out of free_entries_lock\nscope so that we don't acquire serial console's port->lock under it.\n\nTrimmed-down lockdep splat:\n\n The existing dependency chain (in reverse order) is:\n\n -> #2 (free_entries_lock){-.-.}-{2:2}:\n _raw_spin_lock_irqsave+0x60/0x80\n dma_entry_alloc+0x38/0x110\n debug_dma_map_page+0x60/0xf8\n dma_map_page_attrs+0x1e0/0x230\n dma_map_single_attrs.constprop.0+0x6c/0xc8\n geni_se_rx_dma_prep+0x40/0xcc\n qcom_geni_serial_isr+0x310/0x510\n __handle_irq_event_percpu+0x110/0x244\n handle_irq_event_percpu+0x20/0x54\n handle_irq_event+0x50/0x88\n handle_fasteoi_irq+0xa4/0xcc\n handle_irq_desc+0x28/0x40\n generic_handle_domain_irq+0x24/0x30\n gic_handle_irq+0xc4/0x148\n do_interrupt_handler+0xa4/0xb0\n el1_interrupt+0x34/0x64\n el1h_64_irq_handler+0x18/0x24\n el1h_64_irq+0x64/0x68\n arch_local_irq_enable+0x4/0x8\n ____do_softirq+0x18/0x24\n ...\n\n -> #1 (&port_lock_key){-.-.}-{2:2}:\n _raw_spin_lock_irqsave+0x60/0x80\n qcom_geni_serial_console_write+0x184/0x1dc\n console_flush_all+0x344/0x454\n console_unlock+0x94/0xf0\n vprintk_emit+0x238/0x24c\n vprintk_default+0x3c/0x48\n vprintk+0xb4/0xbc\n _printk+0x68/0x90\n register_console+0x230/0x38c\n uart_add_one_port+0x338/0x494\n qcom_geni_serial_probe+0x390/0x424\n platform_probe+0x70/0xc0\n really_probe+0x148/0x280\n __driver_probe_device+0xfc/0x114\n driver_probe_device+0x44/0x100\n __device_attach_driver+0x64/0xdc\n bus_for_each_drv+0xb0/0xd8\n __device_attach+0xe4/0x140\n device_initial_probe+0x1c/0x28\n bus_probe_device+0x44/0xb0\n device_add+0x538/0x668\n of_device_add+0x44/0x50\n of_platform_device_create_pdata+0x94/0xc8\n of_platform_bus_create+0x270/0x304\n of_platform_populate+0xac/0xc4\n devm_of_platform_populate+0x60/0xac\n geni_se_probe+0x154/0x160\n platform_probe+0x70/0xc0\n ...\n\n -> #0 (console_owner){-...}-{0:0}:\n __lock_acquire+0xdf8/0x109c\n lock_acquire+0x234/0x284\n console_flush_all+0x330/0x454\n console_unlock+0x94/0xf0\n vprintk_emit+0x238/0x24c\n vprintk_default+0x3c/0x48\n vprintk+0xb4/0xbc\n _printk+0x68/0x90\n dma_entry_alloc+0xb4/0x110\n debug_dma_map_sg+0xdc/0x2f8\n __dma_map_sg_attrs+0xac/0xe4\n dma_map_sgtable+0x30/0x4c\n get_pages+0x1d4/0x1e4 [msm]\n msm_gem_pin_pages_locked+0x38/0xac [msm]\n msm_gem_pin_vma_locked+0x58/0x88 [msm]\n msm_ioctl_gem_submit+0xde4/0x13ac [msm]\n drm_ioctl_kernel+0xe0/0x15c\n drm_ioctl+0x2e8/0x3f4\n vfs_ioctl+0x30/0x50\n ...\n\n Chain exists of:\n console_owner --> &port_lock_key --> free_entries_lock\n\n Possible unsafe locking scenario:\n\n CPU0 CPU1\n ---- ----\n lock(free_entries_lock);\n lock(&port_lock_key);\n lock(free_entries_lock);\n lock(console_owner);\n\n *** DEADLOCK ***\n\n Call trace:\n dump_backtrace+0xb4/0xf0\n show_stack+0x20/0x30\n dump_stack_lvl+0x60/0x84\n dump_stack+0x18/0x24\n print_circular_bug+0x1cc/0x234\n check_noncircular+0x78/0xac\n __lock_acquire+0xdf8/0x109c\n lock_acquire+0x234/0x284\n console_flush_all+0x330/0x454\n consol\n---truncated---" } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "kernel/dma/debug.c" ], "versions": [ { "version": "1da177e4c3f4", "lessThan": "c79300599923", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f4", "lessThan": "ac0d06809934", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f4", "lessThan": "be8f49029eca", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f4", "lessThan": "fe2b811a02c3", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f4", "lessThan": "fb5a4315591d", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "kernel/dma/debug.c" ], "versions": [ { "version": "5.10.198", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.15.134", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.1.56", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.5.6", "lessThanOrEqual": "6.5.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.6", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/c79300599923daaa30f417c75555d5566b3d31ae" }, { "url": "https://git.kernel.org/stable/c/ac0d068099349cbca3d93f2e3b15bb329364b08c" }, { "url": "https://git.kernel.org/stable/c/be8f49029eca3efbad0d74dbff3cb9129994ffab" }, { "url": "https://git.kernel.org/stable/c/fe2b811a02c3244ebf6059039e4a9e715e26a9e3" }, { "url": "https://git.kernel.org/stable/c/fb5a4315591dae307a65fc246ca80b5159d296e1" } ], "title": "dma-debug: don't call __dma_entry_alloc_check_leak() under free_entries_lock", "x_generator": { "engine": "bippy-a5840b7849dd" } } }, "cveMetadata": { "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038", "cveID": "CVE-2023-52516", "requesterUserId": "gregkh@kernel.org", "serial": "1", "state": "PUBLISHED" }, "dataType": "CVE_RECORD", "dataVersion": "5.0" }