{"id":"CVE-2023-54113","summary":"rcu: dump vmalloc memory info safely","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nrcu: dump vmalloc memory info safely\n\nCurrently, for double invoke call_rcu(), will dump rcu_head objects memory\ninfo, if the objects is not allocated from the slab allocator, the\nvmalloc_dump_obj() will be invoke and the vmap_area_lock spinlock need to\nbe held, since the call_rcu() can be invoked in interrupt context,\ntherefore, there is a possibility of spinlock deadlock scenarios.\n\nAnd in Preempt-RT kernel, the rcutorture test also trigger the following\nlockdep warning:\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: 1, name: swapper/0\npreempt_count: 1, expected: 0\nRCU nest depth: 1, expected: 1\n3 locks held by swapper/0/1:\n #0: ffffffffb534ee80 (fullstop_mutex){+.+.}-{4:4}, at: torture_init_begin+0x24/0xa0\n #1: ffffffffb5307940 (rcu_read_lock){....}-{1:3}, at: rcu_torture_init+0x1ec7/0x2370\n #2: ffffffffb536af40 (vmap_area_lock){+.+.}-{3:3}, at: find_vmap_area+0x1f/0x70\nirq event stamp: 565512\nhardirqs last  enabled at (565511): [\u003cffffffffb379b138\u003e] __call_rcu_common+0x218/0x940\nhardirqs last disabled at (565512): [\u003cffffffffb5804262\u003e] rcu_torture_init+0x20b2/0x2370\nsoftirqs last  enabled at (399112): [\u003cffffffffb36b2586\u003e] __local_bh_enable_ip+0x126/0x170\nsoftirqs last disabled at (399106): [\u003cffffffffb43fef59\u003e] inet_register_protosw+0x9/0x1d0\nPreemption disabled at:\n[\u003cffffffffb58040c3\u003e] rcu_torture_init+0x1f13/0x2370\nCPU: 0 PID: 1 Comm: swapper/0 Tainted: G        W          6.5.0-rc4-rt2-yocto-preempt-rt+ #15\nHardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.2-0-gea1b7a073390-prebuilt.qemu.org 04/01/2014\nCall Trace:\n \u003cTASK\u003e\n dump_stack_lvl+0x68/0xb0\n dump_stack+0x14/0x20\n __might_resched+0x1aa/0x280\n ? __pfx_rcu_torture_err_cb+0x10/0x10\n rt_spin_lock+0x53/0x130\n ? find_vmap_area+0x1f/0x70\n find_vmap_area+0x1f/0x70\n vmalloc_dump_obj+0x20/0x60\n mem_dump_obj+0x22/0x90\n __call_rcu_common+0x5bf/0x940\n ? debug_smp_processor_id+0x1b/0x30\n call_rcu_hurry+0x14/0x20\n rcu_torture_init+0x1f82/0x2370\n ? __pfx_rcu_torture_leak_cb+0x10/0x10\n ? __pfx_rcu_torture_leak_cb+0x10/0x10\n ? __pfx_rcu_torture_init+0x10/0x10\n do_one_initcall+0x6c/0x300\n ? debug_smp_processor_id+0x1b/0x30\n kernel_init_freeable+0x2b9/0x540\n ? __pfx_kernel_init+0x10/0x10\n kernel_init+0x1f/0x150\n ret_from_fork+0x40/0x50\n ? __pfx_kernel_init+0x10/0x10\n ret_from_fork_asm+0x1b/0x30\n \u003c/TASK\u003e\n\nThe previous patch fixes this by using the deadlock-safe best-effort\nversion of find_vm_area.  However, in case of failure print the fact that\nthe pointer was a vmalloc pointer so that we print at least something.","modified":"2026-03-31T17:29:57.568811186Z","published":"2025-12-24T13:06:35.514Z","related":["SUSE-SU-2026:0278-1","SUSE-SU-2026:0281-1","SUSE-SU-2026:0293-1","SUSE-SU-2026:0315-1","SUSE-SU-2026:20477-1","SUSE-SU-2026:20498-1","SUSE-SU-2026:20845-1","SUSE-SU-2026:20876-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/54xxx/CVE-2023-54113.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0a22f9c17b1aa2a35b5eedee928f7841595b55cd"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3f7a4e88e40e38c0b16a4bcb599b7b1d8c81440d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8fb1601ec0a2c4c34fc2170af767e5c2a6400573"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c83ad36a18c02c0f51280b50272327807916987f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/dddca4c46ec92f83449bc91dd199f46a89e066be"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/54xxx/CVE-2023-54113.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-54113"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"98f180837a896ecedf8f7e12af22b57f271d43c9"},{"fixed":"0a22f9c17b1aa2a35b5eedee928f7841595b55cd"},{"fixed":"3f7a4e88e40e38c0b16a4bcb599b7b1d8c81440d"},{"fixed":"dddca4c46ec92f83449bc91dd199f46a89e066be"},{"fixed":"8fb1601ec0a2c4c34fc2170af767e5c2a6400573"},{"fixed":"c83ad36a18c02c0f51280b50272327807916987f"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-54113.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.12.0"},{"fixed":"5.15.132"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.53"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.4.16"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.5.0"},{"fixed":"6.5.3"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-54113.json"}}],"schema_version":"1.7.5"}