{ "containers": { "cna": { "providerMetadata": { "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\naf_unix: fix lockdep positive in sk_diag_dump_icons()\n\nsyzbot reported a lockdep splat [1].\n\nBlamed commit hinted about the possible lockdep\nviolation, and code used unix_state_lock_nested()\nin an attempt to silence lockdep.\n\nIt is not sufficient, because unix_state_lock_nested()\nis already used from unix_state_double_lock().\n\nWe need to use a separate subclass.\n\nThis patch adds a distinct enumeration to make things\nmore explicit.\n\nAlso use swap() in unix_state_double_lock() as a clean up.\n\nv2: add a missing inline keyword to unix_state_lock_nested()\n\n[1]\nWARNING: possible circular locking dependency detected\n6.8.0-rc1-syzkaller-00356-g8a696a29c690 #0 Not tainted\n\nsyz-executor.1/2542 is trying to acquire lock:\n ffff88808b5df9e8 (rlock-AF_UNIX){+.+.}-{2:2}, at: skb_queue_tail+0x36/0x120 net/core/skbuff.c:3863\n\nbut task is already holding lock:\n ffff88808b5dfe70 (&u->lock/1){+.+.}-{2:2}, at: unix_dgram_sendmsg+0xfc7/0x2200 net/unix/af_unix.c:2089\n\nwhich lock already depends on the new lock.\n\nthe existing dependency chain (in reverse order) is:\n\n-> #1 (&u->lock/1){+.+.}-{2:2}:\n lock_acquire+0x1e3/0x530 kernel/locking/lockdep.c:5754\n _raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:378\n sk_diag_dump_icons net/unix/diag.c:87 [inline]\n sk_diag_fill+0x6ea/0xfe0 net/unix/diag.c:157\n sk_diag_dump net/unix/diag.c:196 [inline]\n unix_diag_dump+0x3e9/0x630 net/unix/diag.c:220\n netlink_dump+0x5c1/0xcd0 net/netlink/af_netlink.c:2264\n __netlink_dump_start+0x5d7/0x780 net/netlink/af_netlink.c:2370\n netlink_dump_start include/linux/netlink.h:338 [inline]\n unix_diag_handler_dump+0x1c3/0x8f0 net/unix/diag.c:319\n sock_diag_rcv_msg+0xe3/0x400\n netlink_rcv_skb+0x1df/0x430 net/netlink/af_netlink.c:2543\n sock_diag_rcv+0x2a/0x40 net/core/sock_diag.c:280\n netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline]\n netlink_unicast+0x7e6/0x980 net/netlink/af_netlink.c:1367\n netlink_sendmsg+0xa37/0xd70 net/netlink/af_netlink.c:1908\n sock_sendmsg_nosec net/socket.c:730 [inline]\n __sock_sendmsg net/socket.c:745 [inline]\n sock_write_iter+0x39a/0x520 net/socket.c:1160\n call_write_iter include/linux/fs.h:2085 [inline]\n new_sync_write fs/read_write.c:497 [inline]\n vfs_write+0xa74/0xca0 fs/read_write.c:590\n ksys_write+0x1a0/0x2c0 fs/read_write.c:643\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xf5/0x230 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x63/0x6b\n\n-> #0 (rlock-AF_UNIX){+.+.}-{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+0x1909/0x5ab0 kernel/locking/lockdep.c:3869\n __lock_acquire+0x1345/0x1fd0 kernel/locking/lockdep.c:5137\n lock_acquire+0x1e3/0x530 kernel/locking/lockdep.c:5754\n __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]\n _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162\n skb_queue_tail+0x36/0x120 net/core/skbuff.c:3863\n unix_dgram_sendmsg+0x15d9/0x2200 net/unix/af_unix.c:2112\n sock_sendmsg_nosec net/socket.c:730 [inline]\n __sock_sendmsg net/socket.c:745 [inline]\n ____sys_sendmsg+0x592/0x890 net/socket.c:2584\n ___sys_sendmsg net/socket.c:2638 [inline]\n __sys_sendmmsg+0x3b2/0x730 net/socket.c:2724\n __do_sys_sendmmsg net/socket.c:2753 [inline]\n __se_sys_sendmmsg net/socket.c:2750 [inline]\n __x64_sys_sendmmsg+0xa0/0xb0 net/socket.c:2750\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xf5/0x230 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x63/0x6b\n\nother info that might help us debug this:\n\n Possible unsafe locking scenario:\n\n CPU0 \n---truncated---" } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "versions": [ { "version": "2aac7a2cb0d9", "lessThan": "875f31aaa67e", "status": "affected", "versionType": "git" }, { "version": "2aac7a2cb0d9", "lessThan": "b169ffde733c", "status": "affected", "versionType": "git" }, { "version": "2aac7a2cb0d9", "lessThan": "f199018dc762", "status": "affected", "versionType": "git" }, { "version": "2aac7a2cb0d9", "lessThan": "c8f6b3b864cb", "status": "affected", "versionType": "git" }, { "version": "2aac7a2cb0d9", "lessThan": "a2104f438764", "status": "affected", "versionType": "git" }, { "version": "2aac7a2cb0d9", "lessThan": "5e7f3e0381c0", "status": "affected", "versionType": "git" }, { "version": "2aac7a2cb0d9", "lessThan": "c2d272a9a1e8", "status": "affected", "versionType": "git" }, { "version": "2aac7a2cb0d9", "lessThan": "4d322dce82a1", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "versions": [ { "version": "3.3", "status": "affected" }, { "version": "0", "lessThan": "3.3", "status": "unaffected", "versionType": "custom" }, { "version": "4.19.307", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.4.269", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.10.210", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.15.149", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.1.77", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.6.16", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.7.4", "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/875f31aaa67e306098befa5e798a049075910fa7" }, { "url": "https://git.kernel.org/stable/c/b169ffde733c5adf01788ae091c377f0eca44806" }, { "url": "https://git.kernel.org/stable/c/f199018dc762dfa501f6d96a424468a0f3c10d9e" }, { "url": "https://git.kernel.org/stable/c/c8f6b3b864cb876e9ee21666a391c9ee290682ac" }, { "url": "https://git.kernel.org/stable/c/a2104f43876408b164be5fd58f9b6a3a73b77746" }, { "url": "https://git.kernel.org/stable/c/5e7f3e0381c002cb2abde42f09ad511991a8ebaf" }, { "url": "https://git.kernel.org/stable/c/c2d272a9a1e8f22ba584589219f6fe1886a3595f" }, { "url": "https://git.kernel.org/stable/c/4d322dce82a1d44f8c83f0f54f95dd1b8dcf46c9" } ], "title": "af_unix: fix lockdep positive in sk_diag_dump_icons()", "x_generator": { "engine": "bippy-8df59b4913de" } } }, "cveMetadata": { "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038", "cveID": "CVE-2024-26624", "requesterUserId": "gregkh@kernel.org", "serial": "1", "state": "PUBLISHED" }, "dataType": "CVE_RECORD", "dataVersion": "5.0" }