{"id":"CVE-2024-38661","summary":"s390/ap: Fix crash in AP internal function modify_bitmap()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ns390/ap: Fix crash in AP internal function modify_bitmap()\n\nA system crash like this\n\n  Failing address: 200000cb7df6f000 TEID: 200000cb7df6f403\n  Fault in home space mode while using kernel ASCE.\n  AS:00000002d71bc007 R3:00000003fe5b8007 S:000000011a446000 P:000000015660c13d\n  Oops: 0038 ilc:3 [#1] PREEMPT SMP\n  Modules linked in: mlx5_ib ...\n  CPU: 8 PID: 7556 Comm: bash Not tainted 6.9.0-rc7 #8\n  Hardware name: IBM 3931 A01 704 (LPAR)\n  Krnl PSW : 0704e00180000000 0000014b75e7b606 (ap_parse_bitmap_str+0x10e/0x1f8)\n  R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:2 PM:0 RI:0 EA:3\n  Krnl GPRS: 0000000000000001 ffffffffffffffc0 0000000000000001 00000048f96b75d3\n  000000cb00000100 ffffffffffffffff ffffffffffffffff 000000cb7df6fce0\n  000000cb7df6fce0 00000000ffffffff 000000000000002b 00000048ffffffff\n  000003ff9b2dbc80 200000cb7df6fcd8 0000014bffffffc0 000000cb7df6fbc8\n  Krnl Code: 0000014b75e7b5fc: a7840047            brc     8,0000014b75e7b68a\n  0000014b75e7b600: 18b2                lr      %r11,%r2\n  #0000014b75e7b602: a7f4000a            brc     15,0000014b75e7b616\n  \u003e0000014b75e7b606: eb22d00000e6        laog    %r2,%r2,0(%r13)\n  0000014b75e7b60c: a7680001            lhi     %r6,1\n  0000014b75e7b610: 187b                lr      %r7,%r11\n  0000014b75e7b612: 84960021            brxh    %r9,%r6,0000014b75e7b654\n  0000014b75e7b616: 18e9                lr      %r14,%r9\n  Call Trace:\n  [\u003c0000014b75e7b606\u003e] ap_parse_bitmap_str+0x10e/0x1f8\n  ([\u003c0000014b75e7b5dc\u003e] ap_parse_bitmap_str+0xe4/0x1f8)\n  [\u003c0000014b75e7b758\u003e] apmask_store+0x68/0x140\n  [\u003c0000014b75679196\u003e] kernfs_fop_write_iter+0x14e/0x1e8\n  [\u003c0000014b75598524\u003e] vfs_write+0x1b4/0x448\n  [\u003c0000014b7559894c\u003e] ksys_write+0x74/0x100\n  [\u003c0000014b7618a440\u003e] __do_syscall+0x268/0x328\n  [\u003c0000014b761a3558\u003e] system_call+0x70/0x98\n  INFO: lockdep is turned off.\n  Last Breaking-Event-Address:\n  [\u003c0000014b75e7b636\u003e] ap_parse_bitmap_str+0x13e/0x1f8\n  Kernel panic - not syncing: Fatal exception: panic_on_oops\n\noccured when /sys/bus/ap/a[pq]mask was updated with a relative mask value\n(like +0x10-0x12,+60,-90) with one of the numeric values exceeding INT_MAX.\n\nThe fix is simple: use unsigned long values for the internal variables. The\ncorrect checks are already in place in the function but a simple int for\nthe internal variables was used with the possibility to overflow.","modified":"2026-04-16T04:30:30.678515382Z","published":"2024-06-25T14:22:38.224Z","related":["SUSE-SU-2024:2360-1","SUSE-SU-2024:2372-1","SUSE-SU-2024:2381-1","SUSE-SU-2024:2394-1","SUSE-SU-2024:2561-1","SUSE-SU-2024:2571-1","SUSE-SU-2024:2896-1","SUSE-SU-2024:2939-1","SUSE-SU-2024:2973-1","SUSE-SU-2025:20008-1","SUSE-SU-2025:20028-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/38xxx/CVE-2024-38661.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/2062e3f1f2374102f8014d7ca286b9aa527bd558"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4c0bfb4e867c1ec6616a5049bd3618021e127056"},{"type":"WEB","url":"https://git.kernel.org/stable/c/67011123453b91ec03671d40712fa213e94a01b9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7360cef95aa1ea2b5efb7b5e2ed32e941664e1f0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7c72af16abf2ec7520407098360bbba312289e05"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7dabe54a016defe11bb2a278cd9f1ff6db3feba6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8c5f5911c1b13170d3404eb992c6a0deaa8d81ad"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d4f9d5a99a3fd1b1c691b7a1a6f8f3f25f4116c9"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/38xxx/CVE-2024-38661.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-38661"},{"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":"3d8f60d38e249f989a7fca9c2370c31c3d5487e1"},{"fixed":"2062e3f1f2374102f8014d7ca286b9aa527bd558"},{"fixed":"7c72af16abf2ec7520407098360bbba312289e05"},{"fixed":"7360cef95aa1ea2b5efb7b5e2ed32e941664e1f0"},{"fixed":"67011123453b91ec03671d40712fa213e94a01b9"},{"fixed":"8c5f5911c1b13170d3404eb992c6a0deaa8d81ad"},{"fixed":"4c0bfb4e867c1ec6616a5049bd3618021e127056"},{"fixed":"7dabe54a016defe11bb2a278cd9f1ff6db3feba6"},{"fixed":"d4f9d5a99a3fd1b1c691b7a1a6f8f3f25f4116c9"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-38661.json"}}],"schema_version":"1.7.5"}