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Message-ID: <2025050223-CVE-2023-53099-0987@gregkh> Date: Fri, 2 May 2025 17:56:04 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-cve-announce@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...nel.org> Subject: CVE-2023-53099: firmware: xilinx: don't make a sleepable memory allocation from an atomic context From: Greg Kroah-Hartman <gregkh@...nel.org> Description =========== In the Linux kernel, the following vulnerability has been resolved: firmware: xilinx: don't make a sleepable memory allocation from an atomic context The following issue was discovered using lockdep: [ 6.691371] BUG: sleeping function called from invalid context at include/linux/sched/mm.h:209 [ 6.694602] in_atomic(): 1, irqs_disabled(): 128, non_block: 0, pid: 1, name: swapper/0 [ 6.702431] 2 locks held by swapper/0/1: [ 6.706300] #0: ffffff8800f6f188 (&dev->mutex){....}-{3:3}, at: __device_driver_lock+0x4c/0x90 [ 6.714900] #1: ffffffc009a2abb8 (enable_lock){....}-{2:2}, at: clk_enable_lock+0x4c/0x140 [ 6.723156] irq event stamp: 304030 [ 6.726596] hardirqs last enabled at (304029): [<ffffffc008d17ee0>] _raw_spin_unlock_irqrestore+0xc0/0xd0 [ 6.736142] hardirqs last disabled at (304030): [<ffffffc00876bc5c>] clk_enable_lock+0xfc/0x140 [ 6.744742] softirqs last enabled at (303958): [<ffffffc0080904f0>] _stext+0x4f0/0x894 [ 6.752655] softirqs last disabled at (303951): [<ffffffc0080e53b8>] irq_exit+0x238/0x280 [ 6.760744] CPU: 1 PID: 1 Comm: swapper/0 Tainted: G U 5.15.36 #2 [ 6.768048] Hardware name: xlnx,zynqmp (DT) [ 6.772179] Call trace: [ 6.774584] dump_backtrace+0x0/0x300 [ 6.778197] show_stack+0x18/0x30 [ 6.781465] dump_stack_lvl+0xb8/0xec [ 6.785077] dump_stack+0x1c/0x38 [ 6.788345] ___might_sleep+0x1a8/0x2a0 [ 6.792129] __might_sleep+0x6c/0xd0 [ 6.795655] kmem_cache_alloc_trace+0x270/0x3d0 [ 6.800127] do_feature_check_call+0x100/0x220 [ 6.804513] zynqmp_pm_invoke_fn+0x8c/0xb0 [ 6.808555] zynqmp_pm_clock_getstate+0x90/0xe0 [ 6.813027] zynqmp_pll_is_enabled+0x8c/0x120 [ 6.817327] zynqmp_pll_enable+0x38/0xc0 [ 6.821197] clk_core_enable+0x144/0x400 [ 6.825067] clk_core_enable+0xd4/0x400 [ 6.828851] clk_core_enable+0xd4/0x400 [ 6.832635] clk_core_enable+0xd4/0x400 [ 6.836419] clk_core_enable+0xd4/0x400 [ 6.840203] clk_core_enable+0xd4/0x400 [ 6.843987] clk_core_enable+0xd4/0x400 [ 6.847771] clk_core_enable+0xd4/0x400 [ 6.851555] clk_core_enable_lock+0x24/0x50 [ 6.855683] clk_enable+0x24/0x40 [ 6.858952] fclk_probe+0x84/0xf0 [ 6.862220] platform_probe+0x8c/0x110 [ 6.865918] really_probe+0x110/0x5f0 [ 6.869530] __driver_probe_device+0xcc/0x210 [ 6.873830] driver_probe_device+0x64/0x140 [ 6.877958] __driver_attach+0x114/0x1f0 [ 6.881828] bus_for_each_dev+0xe8/0x160 [ 6.885698] driver_attach+0x34/0x50 [ 6.889224] bus_add_driver+0x228/0x300 [ 6.893008] driver_register+0xc0/0x1e0 [ 6.896792] __platform_driver_register+0x44/0x60 [ 6.901436] fclk_driver_init+0x1c/0x28 [ 6.905220] do_one_initcall+0x104/0x590 [ 6.909091] kernel_init_freeable+0x254/0x2bc [ 6.913390] kernel_init+0x24/0x130 [ 6.916831] ret_from_fork+0x10/0x20 Fix it by passing the GFP_ATOMIC gfp flag for the corresponding memory allocation. The Linux kernel CVE team has assigned CVE-2023-53099 to this issue. Affected and fixed versions =========================== Issue introduced in 5.10 with commit acfdd18591eaac25446e976a0c0d190f8b3dbfb1 and fixed in 5.10.176 with commit b37d3ccbd549494890672136a0e623eb010d46a7 Issue introduced in 5.10 with commit acfdd18591eaac25446e976a0c0d190f8b3dbfb1 and fixed in 5.15.104 with commit 86afb633beaa02ee95b5126a14c9f22cfade4fd9 Issue introduced in 5.10 with commit acfdd18591eaac25446e976a0c0d190f8b3dbfb1 and fixed in 6.1.21 with commit 162049c31eb64308afa22e341a257a723526eb5c Issue introduced in 5.10 with commit acfdd18591eaac25446e976a0c0d190f8b3dbfb1 and fixed in 6.2.8 with commit 9bbab2843f2d1337a268499a1c02b435d2985a17 Issue introduced in 5.10 with commit acfdd18591eaac25446e976a0c0d190f8b3dbfb1 and fixed in 6.3 with commit 38ed310c22e7a0fc978b1f8292136a4a4a8b3051 Issue introduced in 5.9.12 with commit a38a99930883fb1e24f2a34b78a05a6598e86150 Please see https://www.kernel.org for a full list of currently supported kernel versions by the kernel community. Unaffected versions might change over time as fixes are backported to older supported kernel versions. The official CVE entry at https://cve.org/CVERecord/?id=CVE-2023-53099 will be updated if fixes are backported, please check that for the most up to date information about this issue. Affected files ============== The file(s) affected by this issue are: drivers/firmware/xilinx/zynqmp.c Mitigation ========== The Linux kernel CVE team recommends that you update to the latest stable kernel version for this, and many other bugfixes. Individual changes are never tested alone, but rather are part of a larger kernel release. Cherry-picking individual commits is not recommended or supported by the Linux kernel community at all. If however, updating to the latest release is impossible, the individual changes to resolve this issue can be found at these commits: https://git.kernel.org/stable/c/b37d3ccbd549494890672136a0e623eb010d46a7 https://git.kernel.org/stable/c/86afb633beaa02ee95b5126a14c9f22cfade4fd9 https://git.kernel.org/stable/c/162049c31eb64308afa22e341a257a723526eb5c https://git.kernel.org/stable/c/9bbab2843f2d1337a268499a1c02b435d2985a17 https://git.kernel.org/stable/c/38ed310c22e7a0fc978b1f8292136a4a4a8b3051
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