{"cve":"CVE-2024-57885","nvd":{"published":"2025-01-15T13:15:12.893","modified":"2026-06-17T08:14:08.797","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmm/kmemleak: fix sleeping function called from invalid context at print message\n\nAddress a bug in the kernel that triggers a \"sleeping function called from\ninvalid context\" warning when /sys/kernel/debug/kmemleak is printed under\nspecific conditions:\n- CONFIG_PREEMPT_RT=y\n- Set SELinux as the LSM for the system\n- Set kptr_restrict to 1\n- kmemleak buffer contains at least one item\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: 136, name: cat\npreempt_count: 1, expected: 0\nRCU nest depth: 2, expected: 2\n6 locks held by cat/136:\n #0: ffff32e64bcbf950 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xb8/0xe30\n #1: ffffafe6aaa9dea0 (scan_mutex){+.+.}-{3:3}, at: kmemleak_seq_start+0x34/0x128\n #3: ffff32e6546b1cd0 (&object->lock){....}-{2:2}, at: kmemleak_seq_show+0x3c/0x1e0\n #4: ffffafe6aa8d8560 (rcu_read_lock){....}-{1:2}, at: has_ns_capability_noaudit+0x8/0x1b0\n #5: ffffafe6aabbc0f8 (notif_lock){+.+.}-{2:2}, at: avc_compute_av+0xc4/0x3d0\nirq event stamp: 136660\nhardirqs last  enabled at (136659): [<ffffafe6a80fd7a0>] _raw_spin_unlock_irqrestore+0xa8/0xd8\nhardirqs last disabled at (136660): [<ffffafe6a80fd85c>] _raw_spin_lock_irqsave+0x8c/0xb0\nsoftirqs last  enabled at (0): [<ffffafe6a5d50b28>] copy_process+0x11d8/0x3df8\nsoftirqs last disabled at (0): [<0000000000000000>] 0x0\nPreemption disabled at:\n[<ffffafe6a6598a4c>] kmemleak_seq_show+0x3c/0x1e0\nCPU: 1 UID: 0 PID: 136 Comm: cat Tainted: G            E      6.11.0-rt7+ #34\nTainted: [E]=UNSIGNED_MODULE\nHardware name: linux,dummy-virt (DT)\nCall trace:\n dump_backtrace+0xa0/0x128\n show_stack+0x1c/0x30\n dump_stack_lvl+0xe8/0x198\n dump_stack+0x18/0x20\n rt_spin_lock+0x8c/0x1a8\n avc_perm_nonode+0xa0/0x150\n cred_has_capability.isra.0+0x118/0x218\n selinux_capable+0x50/0x80\n security_capable+0x7c/0xd0\n has_ns_capability_noaudit+0x94/0x1b0\n has_capability_noaudit+0x20/0x30\n restricted_pointer+0x21c/0x4b0\n pointer+0x298/0x760\n vsnprintf+0x330/0xf70\n seq_printf+0x178/0x218\n print_unreferenced+0x1a4/0x2d0\n kmemleak_seq_show+0xd0/0x1e0\n seq_read_iter+0x354/0xe30\n seq_read+0x250/0x378\n full_proxy_read+0xd8/0x148\n vfs_read+0x190/0x918\n ksys_read+0xf0/0x1e0\n __arm64_sys_read+0x70/0xa8\n invoke_syscall.constprop.0+0xd4/0x1d8\n el0_svc+0x50/0x158\n el0t_64_sync+0x17c/0x180\n\n%pS and %pK, in the same back trace line, are redundant, and %pS can void\n%pK service in certain contexts.\n\n%pS alone already provides the necessary information, and if it cannot\nresolve the symbol, it falls back to printing the raw address voiding\nthe original intent behind the %pK.\n\nAdditionally, %pK requires a privilege check CAP_SYSLOG enforced through\nthe LSM, which can trigger a \"sleeping function called from invalid\ncontext\" warning under RT_PREEMPT kernels when the check occurs in an\natomic context. This issue may also affect other LSMs.\n\nThis change avoids the unnecessary privilege check and resolves the\nsleeping function warning without any loss of information.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-401"],"references":["https://git.kernel.org/stable/c/64b2d32f22597b2a1dc83ac600b2426588851a97","https://git.kernel.org/stable/c/86d946f3f9992aaa12abcfd09f925446c2cd42a2","https://git.kernel.org/stable/c/cddc76b165161a02ff14c4d84d0f5266d9d32b9e"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:58:20.756570362+00:00"},"epss":{"cve":"CVE-2024-57885","score":0.00206,"percentile":0.10671,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}