{"id":"DEBIAN-CVE-2022-49018","details":"In the Linux kernel, the following vulnerability has been resolved:  mptcp: fix sleep in atomic at close time  Matt reported a splat at msk close time:      BUG: sleeping function called from invalid context at net/mptcp/protocol.c:2877     in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 155, name: packetdrill     preempt_count: 201, expected: 0     RCU nest depth: 0, expected: 0     4 locks held by packetdrill/155:     #0: ffff888001536990 (&sb-\u003es_type-\u003ei_mutex_key#6){+.+.}-{3:3}, at: __sock_release (net/socket.c:650)     #1: ffff88800b498130 (sk_lock-AF_INET){+.+.}-{0:0}, at: mptcp_close (net/mptcp/protocol.c:2973)     #2: ffff88800b49a130 (sk_lock-AF_INET/1){+.+.}-{0:0}, at: __mptcp_close_ssk (net/mptcp/protocol.c:2363)     #3: ffff88800b49a0b0 (slock-AF_INET){+...}-{2:2}, at: __lock_sock_fast (include/net/sock.h:1820)     Preemption disabled at:     0x0     CPU: 1 PID: 155 Comm: packetdrill Not tainted 6.1.0-rc5 #365     Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014     Call Trace:     \u003cTASK\u003e     dump_stack_lvl (lib/dump_stack.c:107 (discriminator 4))     __might_resched.cold (kernel/sched/core.c:9891)     __mptcp_destroy_sock (include/linux/kernel.h:110)     __mptcp_close (net/mptcp/protocol.c:2959)     mptcp_subflow_queue_clean (include/net/sock.h:1777)     __mptcp_close_ssk (net/mptcp/protocol.c:2363)     mptcp_destroy_common (net/mptcp/protocol.c:3170)     mptcp_destroy (include/net/sock.h:1495)     __mptcp_destroy_sock (net/mptcp/protocol.c:2886)     __mptcp_close (net/mptcp/protocol.c:2959)     mptcp_close (net/mptcp/protocol.c:2974)     inet_release (net/ipv4/af_inet.c:432)     __sock_release (net/socket.c:651)     sock_close (net/socket.c:1367)     __fput (fs/file_table.c:320)     task_work_run (kernel/task_work.c:181 (discriminator 1))     exit_to_user_mode_prepare (include/linux/resume_user_mode.h:49)     syscall_exit_to_user_mode (kernel/entry/common.c:130)     do_syscall_64 (arch/x86/entry/common.c:87)     entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:120)  We can't call mptcp_close under the 'fast' socket lock variant, replace it with a sock_lock_nested() as the relevant code is already under the listening msk socket lock protection.","modified":"2026-09-01T20:04:51.826274204Z","published":"2024-10-21T20:15:12.973Z","upstream":["CVE-2022-49018"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2022-49018"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.12-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2022-49018.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.12-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2022-49018.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.12-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2022-49018.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}