GHSA-P237-W2MF-8CWM
Vulnerability from github – Published: 2024-06-19 15:30 – Updated: 2026-05-12 12:31In the Linux kernel, the following vulnerability has been resolved:
netrom: fix possible dead-lock in nr_rt_ioctl()
syzbot loves netrom, and found a possible deadlock in nr_rt_ioctl [1]
Make sure we always acquire nr_node_list_lock before nr_node_lock(nr_node)
[1] WARNING: possible circular locking dependency detected 6.9.0-rc7-syzkaller-02147-g654de42f3fc6 #0 Not tainted
syz-executor350/5129 is trying to acquire lock: ffff8880186e2070 (&nr_node->node_lock){+...}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:356 [inline] ffff8880186e2070 (&nr_node->node_lock){+...}-{2:2}, at: nr_node_lock include/net/netrom.h:152 [inline] ffff8880186e2070 (&nr_node->node_lock){+...}-{2:2}, at: nr_dec_obs net/netrom/nr_route.c:464 [inline] ffff8880186e2070 (&nr_node->node_lock){+...}-{2:2}, at: nr_rt_ioctl+0x1bb/0x1090 net/netrom/nr_route.c:697
but task is already holding lock: ffffffff8f7053b8 (nr_node_list_lock){+...}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:356 [inline] ffffffff8f7053b8 (nr_node_list_lock){+...}-{2:2}, at: nr_dec_obs net/netrom/nr_route.c:462 [inline] ffffffff8f7053b8 (nr_node_list_lock){+...}-{2:2}, at: nr_rt_ioctl+0x10a/0x1090 net/netrom/nr_route.c:697
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 (nr_node_list_lock){+...}-{2:2}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x35/0x50 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:356 [inline] nr_remove_node net/netrom/nr_route.c:299 [inline] nr_del_node+0x4b4/0x820 net/netrom/nr_route.c:355 nr_rt_ioctl+0xa95/0x1090 net/netrom/nr_route.c:683 sock_do_ioctl+0x158/0x460 net/socket.c:1222 sock_ioctl+0x629/0x8e0 net/socket.c:1341 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:904 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:890 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #0 (&nr_node->node_lock){+...}-{2:2}: check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain+0x18cb/0x58e0 kernel/locking/lockdep.c:3869 __lock_acquire+0x1346/0x1fd0 kernel/locking/lockdep.c:5137 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x35/0x50 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:356 [inline] nr_node_lock include/net/netrom.h:152 [inline] nr_dec_obs net/netrom/nr_route.c:464 [inline] nr_rt_ioctl+0x1bb/0x1090 net/netrom/nr_route.c:697 sock_do_ioctl+0x158/0x460 net/socket.c:1222 sock_ioctl+0x629/0x8e0 net/socket.c:1341 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:904 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:890 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(nr_node_list_lock); lock(&nr_node->node_lock); lock(nr_node_list_lock); lock(&nr_node->node_lock);
*** DEADLOCK ***
1 lock held by syz-executor350/5129: #0: ffffffff8f7053b8 (nr_node_list_lock){+...}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:356 [inline] #0: ffffffff8f7053b8 (nr_node_list_lock){+...}-{2:2}, at: nr_dec_obs net/netrom/nr_route.c:462 [inline] #0: ffffffff8f70 ---truncated---
{
"affected": [],
"aliases": [
"CVE-2024-38589"
],
"database_specific": {
"cwe_ids": [
"CWE-667"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-06-19T14:15:19Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetrom: fix possible dead-lock in nr_rt_ioctl()\n\nsyzbot loves netrom, and found a possible deadlock in nr_rt_ioctl [1]\n\nMake sure we always acquire nr_node_list_lock before nr_node_lock(nr_node)\n\n[1]\nWARNING: possible circular locking dependency detected\n6.9.0-rc7-syzkaller-02147-g654de42f3fc6 #0 Not tainted\n------------------------------------------------------\nsyz-executor350/5129 is trying to acquire lock:\n ffff8880186e2070 (\u0026nr_node-\u003enode_lock){+...}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:356 [inline]\n ffff8880186e2070 (\u0026nr_node-\u003enode_lock){+...}-{2:2}, at: nr_node_lock include/net/netrom.h:152 [inline]\n ffff8880186e2070 (\u0026nr_node-\u003enode_lock){+...}-{2:2}, at: nr_dec_obs net/netrom/nr_route.c:464 [inline]\n ffff8880186e2070 (\u0026nr_node-\u003enode_lock){+...}-{2:2}, at: nr_rt_ioctl+0x1bb/0x1090 net/netrom/nr_route.c:697\n\nbut task is already holding lock:\n ffffffff8f7053b8 (nr_node_list_lock){+...}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:356 [inline]\n ffffffff8f7053b8 (nr_node_list_lock){+...}-{2:2}, at: nr_dec_obs net/netrom/nr_route.c:462 [inline]\n ffffffff8f7053b8 (nr_node_list_lock){+...}-{2:2}, at: nr_rt_ioctl+0x10a/0x1090 net/netrom/nr_route.c:697\n\nwhich lock already depends on the new lock.\n\nthe existing dependency chain (in reverse order) is:\n\n-\u003e #1 (nr_node_list_lock){+...}-{2:2}:\n lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754\n __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline]\n _raw_spin_lock_bh+0x35/0x50 kernel/locking/spinlock.c:178\n spin_lock_bh include/linux/spinlock.h:356 [inline]\n nr_remove_node net/netrom/nr_route.c:299 [inline]\n nr_del_node+0x4b4/0x820 net/netrom/nr_route.c:355\n nr_rt_ioctl+0xa95/0x1090 net/netrom/nr_route.c:683\n sock_do_ioctl+0x158/0x460 net/socket.c:1222\n sock_ioctl+0x629/0x8e0 net/socket.c:1341\n vfs_ioctl fs/ioctl.c:51 [inline]\n __do_sys_ioctl fs/ioctl.c:904 [inline]\n __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:890\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\n-\u003e #0 (\u0026nr_node-\u003enode_lock){+...}-{2:2}:\n check_prev_add kernel/locking/lockdep.c:3134 [inline]\n check_prevs_add kernel/locking/lockdep.c:3253 [inline]\n validate_chain+0x18cb/0x58e0 kernel/locking/lockdep.c:3869\n __lock_acquire+0x1346/0x1fd0 kernel/locking/lockdep.c:5137\n lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754\n __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline]\n _raw_spin_lock_bh+0x35/0x50 kernel/locking/spinlock.c:178\n spin_lock_bh include/linux/spinlock.h:356 [inline]\n nr_node_lock include/net/netrom.h:152 [inline]\n nr_dec_obs net/netrom/nr_route.c:464 [inline]\n nr_rt_ioctl+0x1bb/0x1090 net/netrom/nr_route.c:697\n sock_do_ioctl+0x158/0x460 net/socket.c:1222\n sock_ioctl+0x629/0x8e0 net/socket.c:1341\n vfs_ioctl fs/ioctl.c:51 [inline]\n __do_sys_ioctl fs/ioctl.c:904 [inline]\n __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:890\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nother info that might help us debug this:\n\n Possible unsafe locking scenario:\n\n CPU0 CPU1\n ---- ----\n lock(nr_node_list_lock);\n lock(\u0026nr_node-\u003enode_lock);\n lock(nr_node_list_lock);\n lock(\u0026nr_node-\u003enode_lock);\n\n *** DEADLOCK ***\n\n1 lock held by syz-executor350/5129:\n #0: ffffffff8f7053b8 (nr_node_list_lock){+...}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:356 [inline]\n #0: ffffffff8f7053b8 (nr_node_list_lock){+...}-{2:2}, at: nr_dec_obs net/netrom/nr_route.c:462 [inline]\n #0: ffffffff8f70\n---truncated---",
"id": "GHSA-p237-w2mf-8cwm",
"modified": "2026-05-12T12:31:55Z",
"published": "2024-06-19T15:30:54Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-38589"
},
{
"type": "WEB",
"url": "https://cert-portal.siemens.com/productcert/html/ssa-265688.html"
},
{
"type": "WEB",
"url": "https://cert-portal.siemens.com/productcert/html/ssa-613116.html"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1fbfb483c1a290dce3f41f52d45cc46dd88b7691"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3db2fc45d1d2a6457f06ebdfd45b9820e5b5c2b7"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/421c50fa81836775bf0fd6ce0e57a6eb27af24d5"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5bc50a705cfac8f64ce51c95611c3dd0554ef9c3"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5fb7e2a4335fc67d6952ad2a6613c46e0b05f7c5"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b117e5b4f27c2c9076561b6be450a9619f0b79de"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b9d663fbf74290cb68fbc66ae4367bd56837ad1d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e03e7f20ebf7e1611d40d1fdc1bde900fd3335f6"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f28bdc2ee5d9300cc77bd3d97b5b3cdd14960fd8"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
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