{ "data_version": "4.0", "data_type": "CVE", "data_format": "MITRE", "CVE_data_meta": { "ID": "CVE-2024-49935", "ASSIGNER": "cve@kernel.org", "STATE": "PUBLIC" }, "description": { "description_data": [ { "lang": "eng", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nACPI: PAD: fix crash in exit_round_robin()\n\nThe kernel occasionally crashes in cpumask_clear_cpu(), which is called\nwithin exit_round_robin(), because when executing clear_bit(nr, addr) with\nnr set to 0xffffffff, the address calculation may cause misalignment within\nthe memory, leading to access to an invalid memory address.\n\n----------\nBUG: unable to handle kernel paging request at ffffffffe0740618\n ...\nCPU: 3 PID: 2919323 Comm: acpi_pad/14 Kdump: loaded Tainted: G OE X --------- - - 4.18.0-425.19.2.el8_7.x86_64 #1\n ...\nRIP: 0010:power_saving_thread+0x313/0x411 [acpi_pad]\nCode: 89 cd 48 89 d3 eb d1 48 c7 c7 55 70 72 c0 e8 64 86 b0 e4 c6 05 0d a1 02 00 01 e9 bc fd ff ff 45 89 e4 42 8b 04 a5 20 82 72 c0 48 0f b3 05 f4 9c 01 00 42 c7 04 a5 20 82 72 c0 ff ff ff ff 31\nRSP: 0018:ff72a5d51fa77ec8 EFLAGS: 00010202\nRAX: 00000000ffffffff RBX: ff462981e5d8cb80 RCX: 0000000000000000\nRDX: 0000000000000000 RSI: 0000000000000246 RDI: 0000000000000246\nRBP: ff46297556959d80 R08: 0000000000000382 R09: ff46297c8d0f38d8\nR10: 0000000000000000 R11: 0000000000000001 R12: 000000000000000e\nR13: 0000000000000000 R14: ffffffffffffffff R15: 000000000000000e\nFS: 0000000000000000(0000) GS:ff46297a800c0000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: ffffffffe0740618 CR3: 0000007e20410004 CR4: 0000000000771ee0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nPKRU: 55555554\nCall Trace:\n ? acpi_pad_add+0x120/0x120 [acpi_pad]\n kthread+0x10b/0x130\n ? set_kthread_struct+0x50/0x50\n ret_from_fork+0x1f/0x40\n ...\nCR2: ffffffffe0740618\n\ncrash> dis -lr ffffffffc0726923\n ...\n/usr/src/debug/kernel-4.18.0-425.19.2.el8_7/linux-4.18.0-425.19.2.el8_7.x86_64/./include/linux/cpumask.h: 114\n0xffffffffc0726918 :\tmov %r12d,%r12d\n/usr/src/debug/kernel-4.18.0-425.19.2.el8_7/linux-4.18.0-425.19.2.el8_7.x86_64/./include/linux/cpumask.h: 325\n0xffffffffc072691b :\tmov -0x3f8d7de0(,%r12,4),%eax\n/usr/src/debug/kernel-4.18.0-425.19.2.el8_7/linux-4.18.0-425.19.2.el8_7.x86_64/./arch/x86/include/asm/bitops.h: 80\n0xffffffffc0726923 :\tlock btr %rax,0x19cf4(%rip) # 0xffffffffc0740620 \n\ncrash> px tsk_in_cpu[14]\n$66 = 0xffffffff\n\ncrash> px 0xffffffffc072692c+0x19cf4\n$99 = 0xffffffffc0740620\n\ncrash> sym 0xffffffffc0740620\nffffffffc0740620 (b) pad_busy_cpus_bits [acpi_pad]\n\ncrash> px pad_busy_cpus_bits[0]\n$42 = 0xfffc0\n----------\n\nTo fix this, ensure that tsk_in_cpu[tsk_index] != -1 before calling\ncpumask_clear_cpu() in exit_round_robin(), just as it is done in\nround_robin_cpu().\n\n[ rjw: Subject edit, avoid updates to the same value ]" } ] }, "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": "92e5661b7d07" }, { "version_value": "not down converted", "x_cve_json_5_version_data": { "versions": [ { "version": "5.15.168", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.1.113", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.6.55", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.10.14", "lessThanOrEqual": "6.10.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.11.3", "lessThanOrEqual": "6.11.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.12-rc1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ], "defaultStatus": "affected" } } ] } } ] } } ] } }, "references": { "reference_data": [ { "url": "https://git.kernel.org/stable/c/92e5661b7d0727ab912b76625a88b33fdb9b609a", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/92e5661b7d0727ab912b76625a88b33fdb9b609a" }, { "url": "https://git.kernel.org/stable/c/68a599da16ebad442ce295d8d2d5c488e3992822", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/68a599da16ebad442ce295d8d2d5c488e3992822" }, { "url": "https://git.kernel.org/stable/c/68a8e45743d6a120f863fb14b72dc59616597019", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/68a8e45743d6a120f863fb14b72dc59616597019" }, { "url": "https://git.kernel.org/stable/c/03593dbb0b272ef7b0358b099841e65735422aca", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/03593dbb0b272ef7b0358b099841e65735422aca" }, { "url": "https://git.kernel.org/stable/c/27c045f868f0e5052c6b532868a65e0cd250c8fc", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/27c045f868f0e5052c6b532868a65e0cd250c8fc" }, { "url": "https://git.kernel.org/stable/c/0a2ed70a549e61c5181bad5db418d223b68ae932", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/0a2ed70a549e61c5181bad5db418d223b68ae932" } ] }, "generator": { "engine": "bippy-c9c4e1df01b2" } }