CVSS: -EPSS: 0%CPEs: 5EXPL: 0CVE-2022-48721 – net/smc: Forward wakeup to smc socket waitqueue after fallback
https://notcve.org/view.php?id=CVE-2022-48721
In the Linux kernel, the following vulnerability has been resolved: net/smc: Forward wakeup to smc socket waitqueue after fallback When we replace TCP with SMC and a fallback occurs, there may be some socket waitqueue entries remaining in smc socket->wq, such as eppoll_entries inserted by userspace applications. After the fallback, data flows over TCP/IP and only clcsocket->wq will be woken up. Applications can't be notified by the entries which were inserted in smc socket->wq before fallback. So we need a mechanism to wake up smc socket->wq at the same time if some entries remaining in it. The current workaround is to transfer the entries from smc socket->wq to clcsock->wq during the fallback. But this may cause a crash like this: general protection fault, probably for non-canonical address 0xdead000000000100: 0000 [#1] PREEMPT SMP PTI CPU: 3 PID: 0 Comm: swapper/3 Kdump: loaded Tainted: G E 5.16.0+ #107 RIP: 0010:__wake_up_common+0x65/0x170 Call Trace: <IRQ> __wake_up_common_lock+0x7a/0xc0 sock_def_readable+0x3c/0x70 tcp_data_queue+0x4a7/0xc40 tcp_rcv_established+0x32f/0x660 ? sk_filter_trim_cap+0xcb/0x2e0 tcp_v4_do_rcv+0x10b/0x260 tcp_v4_rcv+0xd2a/0xde0 ip_protocol_deliver_rcu+0x3b/0x1d0 ip_local_deliver_finish+0x54/0x60 ip_local_deliver+0x6a/0x110 ? • https://git.kernel.org/stable/c/fb92e025baa73e99250b79ab64f4e088d2888993 https://git.kernel.org/stable/c/2153bd1e3d3dbf6a3403572084ef6ed31c53c5f0 https://git.kernel.org/stable/c/d6e981ec9491be5ec46d838b1151e7edefe607f5 https://git.kernel.org/stable/c/ff6eeb627898c179aac421af5d6515d3f50b84df https://git.kernel.org/stable/c/0ef6049f664941bc0f75828b3a61877635048b27 https://git.kernel.org/stable/c/504078fbe9dd570d685361b57784a6050bc40aaa https://git.kernel.org/stable/c/341adeec9adad0874f29a0a1af35638207352a39 •
CVSS: -EPSS: 0%CPEs: 4EXPL: 0CVE-2022-48720 – net: macsec: Fix offload support for NETDEV_UNREGISTER event
https://notcve.org/view.php?id=CVE-2022-48720
In the Linux kernel, the following vulnerability has been resolved: net: macsec: Fix offload support for NETDEV_UNREGISTER event Current macsec netdev notify handler handles NETDEV_UNREGISTER event by releasing relevant SW resources only, this causes resources leak in case of macsec HW offload, as the underlay driver was not notified to clean it's macsec offload resources. Fix by calling the underlay driver to clean it's relevant resources by moving offload handling from macsec_dellink() to macsec_common_dellink() when handling NETDEV_UNREGISTER event. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: macsec: se corrigió el soporte de descarga para el evento NETDEV_UNREGISTER. El controlador de notificación netdev de macsec actual maneja el evento NETDEV_UNREGISTER liberando solo recursos SW relevantes, lo que provoca una pérdida de recursos en caso de descarga de HW de macsec, ya que No se notificó al controlador subyacente que limpiara sus recursos de descarga de macsec. Para solucionarlo, llame al controlador subyacente para limpiar sus recursos relevantes moviendo el manejo de descarga de macsec_dellink() a macsec_common_dellink() cuando se maneja el evento NETDEV_UNREGISTER. • https://git.kernel.org/stable/c/3cf3227a21d1fb020fe26128e60321bd2151e922 https://git.kernel.org/stable/c/2e7f5b6ee1a7a2c628253a95b0a95b582901ef1b https://git.kernel.org/stable/c/e7a0b3a0806dae3cc81931f0e83055ca2ac6f455 https://git.kernel.org/stable/c/8299be160aad8548071d080518712dec0df92bd5 https://git.kernel.org/stable/c/9cef24c8b76c1f6effe499d2f131807c90f7ce9a •
CVSS: -EPSS: 0%CPEs: 2EXPL: 0CVE-2022-48719 – net, neigh: Do not trigger immediate probes on NUD_FAILED from neigh_managed_work
https://notcve.org/view.php?id=CVE-2022-48719
In the Linux kernel, the following vulnerability has been resolved: net, neigh: Do not trigger immediate probes on NUD_FAILED from neigh_managed_work syzkaller was able to trigger a deadlock for NTF_MANAGED entries [0]: kworker/0:16/14617 is trying to acquire lock: ffffffff8d4dd370 (&tbl->lock){++-.}-{2:2}, at: ___neigh_create+0x9e1/0x2990 net/core/neighbour.c:652 [...] but task is already holding lock: ffffffff8d4dd370 (&tbl->lock){++-.}-{2:2}, at: neigh_managed_work+0x35/0x250 net/core/neighbour.c:1572 The neighbor entry turned to NUD_FAILED state, where __neigh_event_send() triggered an immediate probe as per commit cd28ca0a3dd1 ("neigh: reduce arp latency") via neigh_probe() given table lock was held. One option to fix this situation is to defer the neigh_probe() back to the neigh_timer_handler() similarly as pre cd28ca0a3dd1. For the case of NTF_MANAGED, this deferral is acceptable given this only happens on actual failure state and regular / expected state is NUD_VALID with the entry already present. The fix adds a parameter to __neigh_event_send() in order to communicate whether immediate probe is allowed or disallowed. Existing call-sites of neigh_event_send() default as-is to immediate probe. However, the neigh_managed_work() disables it via use of neigh_event_send_probe(). [0] <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_deadlock_bug kernel/locking/lockdep.c:2956 [inline] check_deadlock kernel/locking/lockdep.c:2999 [inline] validate_chain kernel/locking/lockdep.c:3788 [inline] __lock_acquire.cold+0x149/0x3ab kernel/locking/lockdep.c:5027 lock_acquire kernel/locking/lockdep.c:5639 [inline] lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5604 __raw_write_lock_bh include/linux/rwlock_api_smp.h:202 [inline] _raw_write_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:334 ___neigh_create+0x9e1/0x2990 net/core/neighbour.c:652 ip6_finish_output2+0x1070/0x14f0 net/ipv6/ip6_output.c:123 __ip6_finish_output net/ipv6/ip6_output.c:191 [inline] __ip6_finish_output+0x61e/0xe90 net/ipv6/ip6_output.c:170 ip6_finish_output+0x32/0x200 net/ipv6/ip6_output.c:201 NF_HOOK_COND include/linux/netfilter.h:296 [inline] ip6_output+0x1e4/0x530 net/ipv6/ip6_output.c:224 dst_output include/net/dst.h:451 [inline] NF_HOOK include/linux/netfilter.h:307 [inline] ndisc_send_skb+0xa99/0x17f0 net/ipv6/ndisc.c:508 ndisc_send_ns+0x3a9/0x840 net/ipv6/ndisc.c:650 ndisc_solicit+0x2cd/0x4f0 net/ipv6/ndisc.c:742 neigh_probe+0xc2/0x110 net/core/neighbour.c:1040 __neigh_event_send+0x37d/0x1570 net/core/neighbour.c:1201 neigh_event_send include/net/neighbour.h:470 [inline] neigh_managed_work+0x162/0x250 net/core/neighbour.c:1574 process_one_work+0x9ac/0x1650 kernel/workqueue.c:2307 worker_thread+0x657/0x1110 kernel/workqueue.c:2454 kthread+0x2e9/0x3a0 kernel/kthread.c:377 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 </TASK> En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net, neigh: no activar sondas inmediatas en NUD_FAILED desde neigh_managed_work syzkaller pudo activar un punto muerto para las entradas NTF_MANAGED [0]: kworker/0:16/14617 está intentando adquirir bloqueo: ffffffff8d4dd370 (&tbl->lock){++-.}-{2:2}, en: ___neigh_create+0x9e1/0x2990 net/core/neighbour.c:652 [...] pero la tarea ya mantiene el bloqueo: ffffffff8d4dd370 (&tbl->lock){++-.}-{2:2}, en: neigh_managed_work+0x35/0x250 net/core/neighbour.c:1572 La entrada del vecino pasó al estado NUD_FAILED, donde __neigh_event_send() desencadenó una Sondeo inmediato según el commit cd28ca0a3dd1 ("relincho: reducir la latencia de arp") a través de neigh_probe() dado que se mantuvo el bloqueo de la tabla. Una opción para solucionar esta situación es posponer neigh_probe() nuevamente a neigh_timer_handler() de manera similar a como se hacía antes de cd28ca0a3dd1. • https://git.kernel.org/stable/c/7482e3841d520a368426ac196720601687e2dc47 https://git.kernel.org/stable/c/203a35ebb49cdce377416b0690215d3ce090d364 https://git.kernel.org/stable/c/4a81f6da9cb2d1ef911131a6fd8bd15cb61fc772 •
CVSS: -EPSS: 0%CPEs: 3EXPL: 0CVE-2022-48718 – drm: mxsfb: Fix NULL pointer dereference
https://notcve.org/view.php?id=CVE-2022-48718
In the Linux kernel, the following vulnerability has been resolved: drm: mxsfb: Fix NULL pointer dereference mxsfb should not ever dereference the NULL pointer which drm_atomic_get_new_bridge_state is allowed to return. Assume a fixed format instead. En el kernel de Linux, se resolvió la siguiente vulnerabilidad: drm: mxsfb: corrige la desreferencia del puntero NULL. mxsfb nunca debería desreferenciar el puntero NULL que drm_atomic_get_new_bridge_state puede devolver. En su lugar, asuma un formato fijo. • https://git.kernel.org/stable/c/b776b0f00f246d093c595bac4453c6e51541d5c5 https://git.kernel.org/stable/c/86a337bb803040e4401b87c974a7fb92efe3d0e1 https://git.kernel.org/stable/c/6f9267e01cca749137349d8ffb0d0ebbadf567f4 https://git.kernel.org/stable/c/622c9a3a7868e1eeca39c55305ca3ebec4742b64 •
CVSS: -EPSS: 0%CPEs: 6EXPL: 0CVE-2022-48717 – ASoC: max9759: fix underflow in speaker_gain_control_put()
https://notcve.org/view.php?id=CVE-2022-48717
In the Linux kernel, the following vulnerability has been resolved: ASoC: max9759: fix underflow in speaker_gain_control_put() Check for negative values of "priv->gain" to prevent an out of bounds access. The concern is that these might come from the user via: -> snd_ctl_elem_write_user() -> snd_ctl_elem_write() -> kctl->put() En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ASoC: max9759: corrige el desbordamiento en altavoz_gain_control_put() Compruebe si hay valores negativos de "priv->gain" para evitar un acceso fuera de los límites. La preocupación es que estos puedan provenir del usuario a través de: -> snd_ctl_elem_write_user() -> snd_ctl_elem_write() -> kctl->put() • https://git.kernel.org/stable/c/fa8d915172b8c10ec0734c4021e99e9705023b07 https://git.kernel.org/stable/c/a0f49d12547d45ea8b0f356a96632dd503941c1e https://git.kernel.org/stable/c/71e60c170105d153e34d01766c1e4db26a4b24cc https://git.kernel.org/stable/c/5a45448ac95b715173edb1cd090ff24b6586d921 https://git.kernel.org/stable/c/baead410e5db49e962a67fffc17ac30e44b50b7c https://git.kernel.org/stable/c/f114fd6165dfb52520755cc4d1c1dfbd447b88b6 https://git.kernel.org/stable/c/4c907bcd9dcd233da6707059d777ab389dcbd964 •