[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"repo-stars":3,"vuln-CVE-2025-68310":6},{"stargazers_count":4,"fetched_at":5},7,"2026-07-30T21:17:53.703Z",{"id":7,"descriptions":8,"cisa":9,"weaknesses":10,"exploits":11,"aliases":12,"duplicate_of":9,"upstream":13,"downstream":14,"duplicates":57,"related":58,"reserved_at":9,"published_at":63,"modified_at":64,"state":65,"summary":66,"references_raw":70,"kevs":93,"epss":94,"epss_history":97,"metrics":367,"affected":368},"CVE-2025-68310","In the Linux kernel, the following vulnerability has been resolved:\n\ns390/pci: Avoid deadlock between PCI error recovery and mlx5 crdump\n\nDo not block PCI config accesses through pci_cfg_access_lock() when\nexecuting the s390 variant of PCI error recovery: Acquire just\ndevice_lock() instead of pci_dev_lock() as powerpc's EEH and\ngenerig PCI AER processing do.\n\nDuring error recovery testing a pair of tasks was reported to be hung:\n\nmlx5_core 0000:00:00.1: mlx5_health_try_recover:338:(pid 5553): health recovery flow aborted, PCI reads still not working\nINFO: task kmcheck:72 blocked for more than 122 seconds.\n      Not tainted 5.14.0-570.12.1.bringup7.el9.s390x #1\n\"echo 0 > /proc/sys/kernel/hung_task_timeout_secs\" disables this message.\ntask:kmcheck         state:D stack:0     pid:72    tgid:72    ppid:2      flags:0x00000000\nCall Trace:\n [\u003C000000065256f030>] __schedule+0x2a0/0x590\n [\u003C000000065256f356>] schedule+0x36/0xe0\n [\u003C000000065256f572>] schedule_preempt_disabled+0x22/0x30\n [\u003C0000000652570a94>] __mutex_lock.constprop.0+0x484/0x8a8\n [\u003C000003ff800673a4>] mlx5_unload_one+0x34/0x58 [mlx5_core]\n [\u003C000003ff8006745c>] mlx5_pci_err_detected+0x94/0x140 [mlx5_core]\n [\u003C0000000652556c5a>] zpci_event_attempt_error_recovery+0xf2/0x398\n [\u003C0000000651b9184a>] __zpci_event_error+0x23a/0x2c0\nINFO: task kworker/u1664:6:1514 blocked for more than 122 seconds.\n      Not tainted 5.14.0-570.12.1.bringup7.el9.s390x #1\n\"echo 0 > /proc/sys/kernel/hung_task_timeout_secs\" disables this message.\ntask:kworker/u1664:6 state:D stack:0     pid:1514  tgid:1514  ppid:2      flags:0x00000000\nWorkqueue: mlx5_health0000:00:00.0 mlx5_fw_fatal_reporter_err_work [mlx5_core]\nCall Trace:\n [\u003C000000065256f030>] __schedule+0x2a0/0x590\n [\u003C000000065256f356>] schedule+0x36/0xe0\n [\u003C0000000652172e28>] pci_wait_cfg+0x80/0xe8\n [\u003C0000000652172f94>] pci_cfg_access_lock+0x74/0x88\n [\u003C000003ff800916b6>] mlx5_vsc_gw_lock+0x36/0x178 [mlx5_core]\n [\u003C000003ff80098824>] mlx5_crdump_collect+0x34/0x1c8 [mlx5_core]\n [\u003C000003ff80074b62>] mlx5_fw_fatal_reporter_dump+0x6a/0xe8 [mlx5_core]\n [\u003C0000000652512242>] devlink_health_do_dump.part.0+0x82/0x168\n [\u003C0000000652513212>] devlink_health_report+0x19a/0x230\n [\u003C000003ff80075a12>] mlx5_fw_fatal_reporter_err_work+0xba/0x1b0 [mlx5_core]\n\nNo kernel log of the exact same error with an upstream kernel is\navailable - but the very same deadlock situation can be constructed there,\ntoo:\n\n- task: kmcheck\n  mlx5_unload_one() tries to acquire devlink lock while the PCI error\n  recovery code has set pdev->block_cfg_access by way of\n  pci_cfg_access_lock()\n- task: kworker\n  mlx5_crdump_collect() tries to set block_cfg_access through\n  pci_cfg_access_lock() while devlink_health_report() had acquired\n  the devlink lock.\n\nA similar deadlock situation can be reproduced by requesting a\ncrdump with\n  > devlink health dump show pci/\u003CBDF> reporter fw_fatal\n\nwhile PCI error recovery is executed on the same \u003CBDF> physical function\nby mlx5_core's pci_error_handlers. On s390 this can be injected with\n  > zpcictl --reset-fw \u003CBDF>\n\nTests with this patch failed to reproduce that second deadlock situation,\nthe devlink command is rejected with \"kernel answers: Permission denied\" -\nand we get a kernel log message of:\n\nmlx5_core 1ed0:00:00.1: mlx5_crdump_collect:50:(pid 254382): crdump: failed to lock vsc gw err -5\n\nbecause the config read of VSC_SEMAPHORE is rejected by the underlying\nhardware.\n\nTwo prior attempts to address this issue have been discussed and\nultimately rejected [see link], with the primary argument that s390's\nimplementation of PCI error recovery is imposing restrictions that\nneither powerpc's EEH nor PCI AER handling need. Tests show that PCI\nerror recovery on s390 is running to completion even without blocking\naccess to PCI config 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