{ "dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": { "cveId": "CVE-2024-26725", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-19T14:20:24.163Z", "datePublished": "2024-04-03T14:55:24.074Z", "dateUpdated": "2024-09-11T17:32:52.134Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-05-29T05:21:34.603Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndpll: fix possible deadlock during netlink dump operation\n\nRecently, I've been hitting following deadlock warning during dpll pin\ndump:\n\n[52804.637962] ======================================================\n[52804.638536] WARNING: possible circular locking dependency detected\n[52804.639111] 6.8.0-rc2jiri+ #1 Not tainted\n[52804.639529] ------------------------------------------------------\n[52804.640104] python3/2984 is trying to acquire lock:\n[52804.640581] ffff88810e642678 (nlk_cb_mutex-GENERIC){+.+.}-{3:3}, at: netlink_dump+0xb3/0x780\n[52804.641417]\n but task is already holding lock:\n[52804.642010] ffffffff83bde4c8 (dpll_lock){+.+.}-{3:3}, at: dpll_lock_dumpit+0x13/0x20\n[52804.642747]\n which lock already depends on the new lock.\n\n[52804.643551]\n the existing dependency chain (in reverse order) is:\n[52804.644259]\n -> #1 (dpll_lock){+.+.}-{3:3}:\n[52804.644836] lock_acquire+0x174/0x3e0\n[52804.645271] __mutex_lock+0x119/0x1150\n[52804.645723] dpll_lock_dumpit+0x13/0x20\n[52804.646169] genl_start+0x266/0x320\n[52804.646578] __netlink_dump_start+0x321/0x450\n[52804.647056] genl_family_rcv_msg_dumpit+0x155/0x1e0\n[52804.647575] genl_rcv_msg+0x1ed/0x3b0\n[52804.648001] netlink_rcv_skb+0xdc/0x210\n[52804.648440] genl_rcv+0x24/0x40\n[52804.648831] netlink_unicast+0x2f1/0x490\n[52804.649290] netlink_sendmsg+0x36d/0x660\n[52804.649742] __sock_sendmsg+0x73/0xc0\n[52804.650165] __sys_sendto+0x184/0x210\n[52804.650597] __x64_sys_sendto+0x72/0x80\n[52804.651045] do_syscall_64+0x6f/0x140\n[52804.651474] entry_SYSCALL_64_after_hwframe+0x46/0x4e\n[52804.652001]\n -> #0 (nlk_cb_mutex-GENERIC){+.+.}-{3:3}:\n[52804.652650] check_prev_add+0x1ae/0x1280\n[52804.653107] __lock_acquire+0x1ed3/0x29a0\n[52804.653559] lock_acquire+0x174/0x3e0\n[52804.653984] __mutex_lock+0x119/0x1150\n[52804.654423] netlink_dump+0xb3/0x780\n[52804.654845] __netlink_dump_start+0x389/0x450\n[52804.655321] genl_family_rcv_msg_dumpit+0x155/0x1e0\n[52804.655842] genl_rcv_msg+0x1ed/0x3b0\n[52804.656272] netlink_rcv_skb+0xdc/0x210\n[52804.656721] genl_rcv+0x24/0x40\n[52804.657119] netlink_unicast+0x2f1/0x490\n[52804.657570] netlink_sendmsg+0x36d/0x660\n[52804.658022] __sock_sendmsg+0x73/0xc0\n[52804.658450] __sys_sendto+0x184/0x210\n[52804.658877] __x64_sys_sendto+0x72/0x80\n[52804.659322] do_syscall_64+0x6f/0x140\n[52804.659752] entry_SYSCALL_64_after_hwframe+0x46/0x4e\n[52804.660281]\n other info that might help us debug this:\n\n[52804.661077] Possible unsafe locking scenario:\n\n[52804.661671] CPU0 CPU1\n[52804.662129] ---- ----\n[52804.662577] lock(dpll_lock);\n[52804.662924] lock(nlk_cb_mutex-GENERIC);\n[52804.663538] lock(dpll_lock);\n[52804.664073] lock(nlk_cb_mutex-GENERIC);\n[52804.664490]\n\nThe issue as follows: __netlink_dump_start() calls control->start(cb)\nwith nlk->cb_mutex held. In control->start(cb) the dpll_lock is taken.\nThen nlk->cb_mutex is released and taken again in netlink_dump(), while\ndpll_lock still being held. That leads to ABBA deadlock when another\nCPU races with the same operation.\n\nFix this by moving dpll_lock taking into dumpit() callback which ensures\ncorrect lock taking order." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "Documentation/netlink/specs/dpll.yaml", "drivers/dpll/dpll_netlink.c", "drivers/dpll/dpll_nl.c", "drivers/dpll/dpll_nl.h" ], "versions": [ { "version": "9d71b54b65b1", "lessThan": "087739cbd0d0", "status": "affected", "versionType": "git" }, { "version": "9d71b54b65b1", "lessThan": "53c0441dd2c4", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "Documentation/netlink/specs/dpll.yaml", "drivers/dpll/dpll_netlink.c", "drivers/dpll/dpll_nl.c", "drivers/dpll/dpll_nl.h" ], "versions": [ { "version": "6.7", "status": "affected" }, { "version": "0", "lessThan": "6.7", "status": "unaffected", "versionType": "custom" }, { "version": "6.7.6", "lessThanOrEqual": "6.7.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.8", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/087739cbd0d0b87b6cec2c0799436ac66e24acc8" }, { "url": "https://git.kernel.org/stable/c/53c0441dd2c44ee93fddb5473885fd41e4bc2361" } ], "title": "dpll: fix possible deadlock during netlink dump operation", "x_generator": { "engine": "bippy-a5840b7849dd" } }, "adp": [ { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T00:14:12.969Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/087739cbd0d0b87b6cec2c0799436ac66e24acc8", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/53c0441dd2c44ee93fddb5473885fd41e4bc2361", "tags": [ "x_transferred" ] } ] }, { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2024-26725", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-09-10T15:52:13.550439Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T17:32:52.134Z" } } ] } }