CVSS: -EPSS: 0%CPEs: 7EXPL: 0CVE-2024-56642 – tipc: Fix use-after-free of kernel socket in cleanup_bearer().
https://notcve.org/view.php?id=CVE-2024-56642
In the Linux kernel, the following vulnerability has been resolved: tipc: Fix use-after-free of kernel socket in cleanup_bearer(). syzkaller reported a use-after-free of UDP kernel socket in cleanup_bearer() without repro. [0][1] When bearer_disable() calls tipc_udp_disable(), cleanup of the UDP kernel socket is deferred by work calling cleanup_bearer(). tipc_net_stop() waits for such works to finish by checking tipc_net(net)->wq_count. However, the work decrements the count too early before releasing the kernel socket, unblocking cleanup_net() and resulting in use-after-free. Let's move the decrement after releasing the socket in cleanup_bearer(). [0]: ref_tracker: net notrefcnt@000000009b3d1faf has 1/1 users at sk_alloc+0x438/0x608 inet_create+0x4c8/0xcb0 __sock_create+0x350/0x6b8 sock_create_kern+0x58/0x78 udp_sock_create4+0x68/0x398 udp_sock_create+0x88/0xc8 tipc_udp_enable+0x5e8/0x848 __tipc_nl_bearer_enable+0x84c/0xed8 tipc_nl_bearer_enable+0x38/0x60 genl_family_rcv_msg_doit+0x170/0x248 genl_rcv_msg+0x400/0x5b0 netlink_rcv_skb+0x1dc/0x398 genl_rcv+0x44/0x68 netlink_unicast+0x678/0x8b0 netlink_sendmsg+0x5e4/0x898 ____sys_sendmsg+0x500/0x830 [1]: BUG: KMSAN: use-after-free in udp_hashslot include/net/udp.h:85 [inline] BUG: KMSAN: use-after-free in udp_lib_unhash+0x3b8/0x930 net/ipv4/udp.c:1979 udp_hashslot include/net/udp.h:85 [inline] udp_lib_unhash+0x3b8/0x930 net/ipv4/udp.c:1979 sk_common_release+0xaf/0x3f0 net/core/sock.c:3820 inet_release+0x1e0/0x260 net/ipv4/af_inet.c:437 inet6_release+0x6f/0xd0 net/ipv6/af_inet6.c:489 __sock_release net/socket.c:658 [inline] sock_release+0xa0/0x210 net/socket.c:686 cleanup_bearer+0x42d/0x4c0 net/tipc/udp_media.c:819 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xcaf/0x1c90 kernel/workqueue.c:3310 worker_thread+0xf6c/0x1510 kernel/workqueue.c:3391 kthread+0x531/0x6b0 kernel/kthread.c:389 ret_from_fork+0x60/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:244 Uninit was created at: slab_free_hook mm/slub.c:2269 [inline] slab_free mm/slub.c:4580 [inline] kmem_cache_free+0x207/0xc40 mm/slub.c:4682 net_free net/core/net_namespace.c:454 [inline] cleanup_net+0x16f2/0x19d0 net/core/net_namespace.c:647 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xcaf/0x1c90 kernel/workqueue.c:3310 worker_thread+0xf6c/0x1510 kernel/workqueue.c:3391 kthread+0x531/0x6b0 kernel/kthread.c:389 ret_from_fork+0x60/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:244 CPU: 0 UID: 0 PID: 54 Comm: kworker/0:2 Not tainted 6.12.0-rc1-00131-gf66ebf37d69c #7 91723d6f74857f70725e1583cba3cf4adc716cfa Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 Workqueue: events cleanup_bearer • https://git.kernel.org/stable/c/26abe14379f8e2fa3fd1bcf97c9a7ad9364886fe https://git.kernel.org/stable/c/4e69457f9dfae67435f3ccf29008768eae860415 https://git.kernel.org/stable/c/650ee9a22d7a2de8999fac2d45983597a0c22359 https://git.kernel.org/stable/c/d2a4894f238551eae178904e7f45af87577074fd https://git.kernel.org/stable/c/d62d5180c036eeac09f80660edc7a602b369125f https://git.kernel.org/stable/c/d00d4470bf8c4282617a3a10e76b20a9c7e4cffa https://git.kernel.org/stable/c/e48b211c4c59062cb6dd6c2c37c51a7cc235a464 https://git.kernel.org/stable/c/6a2fa13312e51a621f652d522d7e2df70 •
CVSS: -EPSS: 0%CPEs: 3EXPL: 0CVE-2024-56641 – net/smc: initialize close_work early to avoid warning
https://notcve.org/view.php?id=CVE-2024-56641
In the Linux kernel, the following vulnerability has been resolved: net/smc: initialize close_work early to avoid warning We encountered a warning that close_work was canceled before initialization. WARNING: CPU: 7 PID: 111103 at kernel/workqueue.c:3047 __flush_work+0x19e/0x1b0 Workqueue: events smc_lgr_terminate_work [smc] RIP: 0010:__flush_work+0x19e/0x1b0 Call Trace: ? __wake_up_common+0x7a/0x190 ? work_busy+0x80/0x80 __cancel_work_timer+0xe3/0x160 smc_close_cancel_work+0x1a/0x70 [smc] smc_close_active_abort+0x207/0x360 [smc] __smc_lgr_terminate.part.38+0xc8/0x180 [smc] process_one_work+0x19e/0x340 worker_thread+0x30/0x370 ? process_one_work+0x340/0x340 kthread+0x117/0x130 ? __kthread_cancel_work+0x50/0x50 ret_from_fork+0x22/0x30 This is because when smc_close_cancel_work is triggered, e.g. the RDMA driver is rmmod and the LGR is terminated, the conn->close_work is flushed before initialization, resulting in WARN_ON(! • https://git.kernel.org/stable/c/46c28dbd4c23c3f7fa37f5ea48772af79c9cc40e https://git.kernel.org/stable/c/f0c37002210aaede10dae849d1a78efc2243add2 https://git.kernel.org/stable/c/6638e52dcfafaf1b9cbc34544f0c832db0069ea1 https://git.kernel.org/stable/c/0541db8ee32c09463a72d0987382b3a3336b0043 •
CVSS: -EPSS: 0%CPEs: 5EXPL: 0CVE-2024-56640 – net/smc: fix LGR and link use-after-free issue
https://notcve.org/view.php?id=CVE-2024-56640
In the Linux kernel, the following vulnerability has been resolved: net/smc: fix LGR and link use-after-free issue We encountered a LGR/link use-after-free issue, which manifested as the LGR/link refcnt reaching 0 early and entering the clear process, making resource access unsafe. refcount_t: addition on 0; use-after-free. WARNING: CPU: 14 PID: 107447 at lib/refcount.c:25 refcount_warn_saturate+0x9c/0x140 Workqueue: events smc_lgr_terminate_work [smc] Call trace: refcount_warn_saturate+0x9c/0x140 __smc_lgr_terminate.part.45+0x2a8/0x370 [smc] smc_lgr_terminate_work+0x28/0x30 [smc] process_one_work+0x1b8/0x420 worker_thread+0x158/0x510 kthread+0x114/0x118 or refcount_t: underflow; use-after-free. WARNING: CPU: 6 PID: 93140 at lib/refcount.c:28 refcount_warn_saturate+0xf0/0x140 Workqueue: smc_hs_wq smc_listen_work [smc] Call trace: refcount_warn_saturate+0xf0/0x140 smcr_link_put+0x1cc/0x1d8 [smc] smc_conn_free+0x110/0x1b0 [smc] smc_conn_abort+0x50/0x60 [smc] smc_listen_find_device+0x75c/0x790 [smc] smc_listen_work+0x368/0x8a0 [smc] process_one_work+0x1b8/0x420 worker_thread+0x158/0x510 kthread+0x114/0x118 It is caused by repeated release of LGR/link refcnt. One suspect is that smc_conn_free() is called repeatedly because some smc_conn_free() from server listening path are not protected by sock lock. e.g. Calls under socklock | smc_listen_work ------------------------------------------------------- lock_sock(sk) | smc_conn_abort smc_conn_free | \- smc_conn_free \- smcr_link_put | \- smcr_link_put (duplicated) release_sock(sk) So here add sock lock protection in smc_listen_work() path, making it exclusive with other connection operations. • https://git.kernel.org/stable/c/3b2dec2603d5b06ad3af71c1164ca0b92df3d2a8 https://git.kernel.org/stable/c/f502a88fdd415647a1f2dc45fac71b9c522a052b https://git.kernel.org/stable/c/0cf598548a6c36d90681d53c6b77d52363f2f295 https://git.kernel.org/stable/c/673d606683ac70bc074ca6676b938bff18635226 https://git.kernel.org/stable/c/6f0ae06a234a78ae137064f2c89135ac078a00eb https://git.kernel.org/stable/c/2c7f14ed9c19ec0f149479d1c2842ec1f9bf76d7 •
CVSS: -EPSS: 0%CPEs: 7EXPL: 0CVE-2024-56637 – netfilter: ipset: Hold module reference while requesting a module
https://notcve.org/view.php?id=CVE-2024-56637
In the Linux kernel, the following vulnerability has been resolved: netfilter: ipset: Hold module reference while requesting a module User space may unload ip_set.ko while it is itself requesting a set type backend module, leading to a kernel crash. The race condition may be provoked by inserting an mdelay() right after the nfnl_unlock() call. • https://git.kernel.org/stable/c/a7b4f989a629493bb4ec4a354def784d440b32c4 https://git.kernel.org/stable/c/e5e2d3024753fdaca818b822e3827614bacbdccf https://git.kernel.org/stable/c/6099b5d3e37145484fac4b8b4070c3f1abfb3519 https://git.kernel.org/stable/c/0e67805e805c1f3edd6f43adbe08ea14b552694b https://git.kernel.org/stable/c/5bae60a933ba5d16eed55c6b279be51bcbbc79b0 https://git.kernel.org/stable/c/90bf312a6b6b3d6012137f6776a4052ee85e0340 https://git.kernel.org/stable/c/ba5e070f36682d07ca7ad2a953e6c9d96be19dca https://git.kernel.org/stable/c/456f010bfaefde84d3390c755eedb1b0a •
CVSS: -EPSS: 0%CPEs: 7EXPL: 0CVE-2024-56634 – gpio: grgpio: Add NULL check in grgpio_probe
https://notcve.org/view.php?id=CVE-2024-56634
In the Linux kernel, the following vulnerability has been resolved: gpio: grgpio: Add NULL check in grgpio_probe devm_kasprintf() can return a NULL pointer on failure,but this returned value in grgpio_probe is not checked. Add NULL check in grgpio_probe, to handle kernel NULL pointer dereference error. • https://git.kernel.org/stable/c/7eb6ce2f272336ff8337f40fa8668fa04dc2d684 https://git.kernel.org/stable/c/53ff0caa6ad57372d426b4f48fc0f66df43a731f https://git.kernel.org/stable/c/4733f68e59bb7b9e3d395699abb18366954b9ba7 https://git.kernel.org/stable/c/ad4dfa7ea7f5f7e9a3c78627cfc749bc7005ca7a https://git.kernel.org/stable/c/09adf8792b61c09ae543972a1ece1884ef773848 https://git.kernel.org/stable/c/8d2ca6ac3711a4f4015d26b7cc84f325ac608edb https://git.kernel.org/stable/c/db2fc255fcf41f536ac8666409849e11659af88d https://git.kernel.org/stable/c/050b23d081da0f29474de043e9538c1f7 •