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https://github.com/CVEProject/cvelist.git
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102 lines
7.7 KiB
JSON
102 lines
7.7 KiB
JSON
{
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"data_version": "4.0",
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"data_type": "CVE",
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"data_format": "MITRE",
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"CVE_data_meta": {
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"ID": "CVE-2024-26725",
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"ASSIGNER": "cve@kernel.org",
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"STATE": "PUBLIC"
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},
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"description": {
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"description_data": [
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{
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"lang": "eng",
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"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."
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}
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]
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},
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"problemtype": {
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"problemtype_data": [
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{
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"description": [
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{
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"lang": "eng",
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"value": "n/a"
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}
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]
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}
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]
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},
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"affects": {
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"vendor": {
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"vendor_data": [
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{
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"vendor_name": "Linux",
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"product": {
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"product_data": [
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{
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"product_name": "Linux",
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"version": {
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"version_data": [
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{
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"version_affected": "<",
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"version_name": "9d71b54b65b1",
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"version_value": "087739cbd0d0"
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},
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{
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"version_value": "not down converted",
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"x_cve_json_5_version_data": {
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"versions": [
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{
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"version": "6.7",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "6.7",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.7.6",
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"lessThanOrEqual": "6.7.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.8",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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],
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"defaultStatus": "affected"
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}
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}
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]
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}
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}
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]
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}
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}
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]
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}
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},
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"references": {
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"reference_data": [
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{
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"url": "https://git.kernel.org/stable/c/087739cbd0d0b87b6cec2c0799436ac66e24acc8",
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"refsource": "MISC",
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"name": "https://git.kernel.org/stable/c/087739cbd0d0b87b6cec2c0799436ac66e24acc8"
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},
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{
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"url": "https://git.kernel.org/stable/c/53c0441dd2c44ee93fddb5473885fd41e4bc2361",
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"refsource": "MISC",
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"name": "https://git.kernel.org/stable/c/53c0441dd2c44ee93fddb5473885fd41e4bc2361"
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}
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]
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},
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"generator": {
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"engine": "bippy-9e1c9544281a"
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}
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} |