{ "data_version": "4.0", "data_type": "CVE", "data_format": "MITRE", "CVE_data_meta": { "ID": "CVE-2024-40980", "ASSIGNER": "cve@kernel.org", "STATE": "PUBLIC" }, "description": { "description_data": [ { "lang": "eng", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrop_monitor: replace spin_lock by raw_spin_lock\n\ntrace_drop_common() is called with preemption disabled, and it acquires\na spin_lock. This is problematic for RT kernels because spin_locks are\nsleeping locks in this configuration, which causes the following splat:\n\nBUG: sleeping function called from invalid context at kernel/locking/spinlock_rt.c:48\nin_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 449, name: rcuc/47\npreempt_count: 1, expected: 0\nRCU nest depth: 2, expected: 2\n5 locks held by rcuc/47/449:\n #0: ff1100086ec30a60 ((softirq_ctrl.lock)){+.+.}-{2:2}, at: __local_bh_disable_ip+0x105/0x210\n #1: ffffffffb394a280 (rcu_read_lock){....}-{1:2}, at: rt_spin_lock+0xbf/0x130\n #2: ffffffffb394a280 (rcu_read_lock){....}-{1:2}, at: __local_bh_disable_ip+0x11c/0x210\n #3: ffffffffb394a160 (rcu_callback){....}-{0:0}, at: rcu_do_batch+0x360/0xc70\n #4: ff1100086ee07520 (&data->lock){+.+.}-{2:2}, at: trace_drop_common.constprop.0+0xb5/0x290\nirq event stamp: 139909\nhardirqs last enabled at (139908): [] _raw_spin_unlock_irqrestore+0x63/0x80\nhardirqs last disabled at (139909): [] trace_drop_common.constprop.0+0x26d/0x290\nsoftirqs last enabled at (139892): [] __local_bh_enable_ip+0x103/0x170\nsoftirqs last disabled at (139898): [] rcu_cpu_kthread+0x93/0x1f0\nPreemption disabled at:\n[] rt_mutex_slowunlock+0xab/0x2e0\nCPU: 47 PID: 449 Comm: rcuc/47 Not tainted 6.9.0-rc2-rt1+ #7\nHardware name: Dell Inc. PowerEdge R650/0Y2G81, BIOS 1.6.5 04/15/2022\nCall Trace:\n \n dump_stack_lvl+0x8c/0xd0\n dump_stack+0x14/0x20\n __might_resched+0x21e/0x2f0\n rt_spin_lock+0x5e/0x130\n ? trace_drop_common.constprop.0+0xb5/0x290\n ? skb_queue_purge_reason.part.0+0x1bf/0x230\n trace_drop_common.constprop.0+0xb5/0x290\n ? preempt_count_sub+0x1c/0xd0\n ? _raw_spin_unlock_irqrestore+0x4a/0x80\n ? __pfx_trace_drop_common.constprop.0+0x10/0x10\n ? rt_mutex_slowunlock+0x26a/0x2e0\n ? skb_queue_purge_reason.part.0+0x1bf/0x230\n ? __pfx_rt_mutex_slowunlock+0x10/0x10\n ? skb_queue_purge_reason.part.0+0x1bf/0x230\n trace_kfree_skb_hit+0x15/0x20\n trace_kfree_skb+0xe9/0x150\n kfree_skb_reason+0x7b/0x110\n skb_queue_purge_reason.part.0+0x1bf/0x230\n ? __pfx_skb_queue_purge_reason.part.0+0x10/0x10\n ? mark_lock.part.0+0x8a/0x520\n...\n\ntrace_drop_common() also disables interrupts, but this is a minor issue\nbecause we could easily replace it with a local_lock.\n\nReplace the spin_lock with raw_spin_lock to avoid sleeping in atomic\ncontext." } ] }, "problemtype": { "problemtype_data": [ { "description": [ { "lang": "eng", "value": "n/a" } ] } ] }, "affects": { "vendor": { "vendor_data": [ { "vendor_name": "Linux", "product": { "product_data": [ { "product_name": "Linux", "version": { "version_data": [ { "version_affected": "<", "version_name": "1da177e4c3f4", "version_value": "594e47957f3f" }, { "version_value": "not down converted", "x_cve_json_5_version_data": { "versions": [ { "version": "5.4.279", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.10.221", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.15.162", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.1.96", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.6.36", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.9.7", "lessThanOrEqual": "6.9.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.10", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ], "defaultStatus": "affected" } } ] } } ] } } ] } }, "references": { "reference_data": [ { "url": "https://git.kernel.org/stable/c/594e47957f3fe034645e6885393ce96c12286334", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/594e47957f3fe034645e6885393ce96c12286334" }, { "url": "https://git.kernel.org/stable/c/96941f29ebcc1e9cbf570dc903f30374909562f5", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/96941f29ebcc1e9cbf570dc903f30374909562f5" }, { "url": "https://git.kernel.org/stable/c/b3722fb69468693555f531cddda5c30444726dac", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/b3722fb69468693555f531cddda5c30444726dac" }, { "url": "https://git.kernel.org/stable/c/f251ccef1d864790e5253386e95544420b7cd8f3", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/f251ccef1d864790e5253386e95544420b7cd8f3" }, { "url": "https://git.kernel.org/stable/c/76ce2f9125244e1708d29c1d3f9d1d50b347bda0", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/76ce2f9125244e1708d29c1d3f9d1d50b347bda0" }, { "url": "https://git.kernel.org/stable/c/07ea878684dfb78a9d4f564c39d07e855a9e242e", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/07ea878684dfb78a9d4f564c39d07e855a9e242e" }, { "url": "https://git.kernel.org/stable/c/f1e197a665c2148ebc25fe09c53689e60afea195", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/f1e197a665c2148ebc25fe09c53689e60afea195" } ] }, "generator": { "engine": "bippy-c9c4e1df01b2" } }