{"id":"CVE-2024-36928","summary":"s390/qeth: Fix kernel panic after setting hsuid","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ns390/qeth: Fix kernel panic after setting hsuid\n\nSymptom:\nWhen the hsuid attribute is set for the first time on an IQD Layer3\ndevice while the corresponding network interface is already UP,\nthe kernel will try to execute a napi function pointer that is NULL.\n\nExample:\n---------------------------------------------------------------------------\n[ 2057.572696] illegal operation: 0001 ilc:1 [#1] SMP\n[ 2057.572702] Modules linked in: af_iucv qeth_l3 zfcp scsi_transport_fc sunrpc nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib nft_reject_inet nf_reject_ipv4 nf_reject_ipv6\nnft_reject nft_ct nf_tables_set nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ip_set nf_tables libcrc32c nfnetlink ghash_s390 prng xts aes_s390 des_s390 de\ns_generic sha3_512_s390 sha3_256_s390 sha512_s390 vfio_ccw vfio_mdev mdev vfio_iommu_type1 eadm_sch vfio ext4 mbcache jbd2 qeth_l2 bridge stp llc dasd_eckd_mod qeth dasd_mod\n qdio ccwgroup pkey zcrypt\n[ 2057.572739] CPU: 6 PID: 60182 Comm: stress_client Kdump: loaded Not tainted 4.18.0-541.el8.s390x #1\n[ 2057.572742] Hardware name: IBM 3931 A01 704 (LPAR)\n[ 2057.572744] Krnl PSW : 0704f00180000000 0000000000000002 (0x2)\n[ 2057.572748]            R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:3 PM:0 RI:0 EA:3\n[ 2057.572751] Krnl GPRS: 0000000000000004 0000000000000000 00000000a3b008d8 0000000000000000\n[ 2057.572754]            00000000a3b008d8 cb923a29c779abc5 0000000000000000 00000000814cfd80\n[ 2057.572756]            000000000000012c 0000000000000000 00000000a3b008d8 00000000a3b008d8\n[ 2057.572758]            00000000bab6d500 00000000814cfd80 0000000091317e46 00000000814cfc68\n[ 2057.572762] Krnl Code:#0000000000000000: 0000                illegal\n                         \u003e0000000000000002: 0000                illegal\n                          0000000000000004: 0000                illegal\n                          0000000000000006: 0000                illegal\n                          0000000000000008: 0000                illegal\n                          000000000000000a: 0000                illegal\n                          000000000000000c: 0000                illegal\n                          000000000000000e: 0000                illegal\n[ 2057.572800] Call Trace:\n[ 2057.572801] ([\u003c00000000ec639700\u003e] 0xec639700)\n[ 2057.572803]  [\u003c00000000913183e2\u003e] net_rx_action+0x2ba/0x398\n[ 2057.572809]  [\u003c0000000091515f76\u003e] __do_softirq+0x11e/0x3a0\n[ 2057.572813]  [\u003c0000000090ce160c\u003e] do_softirq_own_stack+0x3c/0x58\n[ 2057.572817] ([\u003c0000000090d2cbd6\u003e] do_softirq.part.1+0x56/0x60)\n[ 2057.572822]  [\u003c0000000090d2cc60\u003e] __local_bh_enable_ip+0x80/0x98\n[ 2057.572825]  [\u003c0000000091314706\u003e] __dev_queue_xmit+0x2be/0xd70\n[ 2057.572827]  [\u003c000003ff803dd6d6\u003e] afiucv_hs_send+0x24e/0x300 [af_iucv]\n[ 2057.572830]  [\u003c000003ff803dd88a\u003e] iucv_send_ctrl+0x102/0x138 [af_iucv]\n[ 2057.572833]  [\u003c000003ff803de72a\u003e] iucv_sock_connect+0x37a/0x468 [af_iucv]\n[ 2057.572835]  [\u003c00000000912e7e90\u003e] __sys_connect+0xa0/0xd8\n[ 2057.572839]  [\u003c00000000912e9580\u003e] sys_socketcall+0x228/0x348\n[ 2057.572841]  [\u003c0000000091514e1a\u003e] system_call+0x2a6/0x2c8\n[ 2057.572843] Last Breaking-Event-Address:\n[ 2057.572844]  [\u003c0000000091317e44\u003e] __napi_poll+0x4c/0x1d8\n[ 2057.572846]\n[ 2057.572847] Kernel panic - not syncing: Fatal exception in interrupt\n-------------------------------------------------------------------------------------------\n\nAnalysis:\nThere is one napi structure per out_q: card-\u003eqdio.out_qs[i].napi\nThe napi.poll functions are set during qeth_open().\n\nSince\ncommit 1cfef80d4c2b (\"s390/qeth: Don't call dev_close/dev_open (DOWN/UP)\")\nqeth_set_offline()/qeth_set_online() no longer call dev_close()/\ndev_open(). So if qeth_free_qdio_queues() cleared\ncard-\u003eqdio.out_qs[i].napi.poll while the network interface was UP and the\ncard was offline, they are not set again.\n\nReproduction:\nchzdev -e $devno layer2=0\nip link set dev $network_interface up\necho 0 \u003e /sys/bus/ccw\n---truncated---","modified":"2026-04-16T04:38:11.610052310Z","published":"2024-05-30T15:29:20.854Z","related":["SUSE-SU-2024:2008-1","SUSE-SU-2024:2019-1","SUSE-SU-2024:2135-1","SUSE-SU-2024:2190-1","SUSE-SU-2024:2203-1","SUSE-SU-2024:2973-1","SUSE-SU-2025:20008-1","SUSE-SU-2025:20028-1","SUSE-SU-2025:20166-1","SUSE-SU-2025:20249-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/36xxx/CVE-2024-36928.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/10cb803aff3b11fe0bd5f274fc1c231a43e88df6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8792b557eb50b986f2496156d486d0c7c85a1524"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8a2e4d37afb8500b276e5ee903dee06f50ab0494"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e28dd1e1bf3ebb52cdb877fb359e8978a51576e3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/eae0aec245712c52a3ce9c05575b541a9eef5282"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/36xxx/CVE-2024-36928.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-36928"},{"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":"64e3affee2881bb22df7ce45dd1f1fd7990e382b"},{"fixed":"8792b557eb50b986f2496156d486d0c7c85a1524"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"86818409f989fee29c38528ed8fb085655603356"},{"fixed":"10cb803aff3b11fe0bd5f274fc1c231a43e88df6"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"1cfef80d4c2b2c599189f36f36320b205d9447d9"},{"fixed":"e28dd1e1bf3ebb52cdb877fb359e8978a51576e3"},{"fixed":"eae0aec245712c52a3ce9c05575b541a9eef5282"},{"fixed":"8a2e4d37afb8500b276e5ee903dee06f50ab0494"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0"},{"last_affected":"c33d5a5c5b2c79326190885040f1643793c67b29"},{"last_affected":"29d6fe395087710280f8e11d4ae79569c4cb14b7"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-36928.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H"}]}