CVSS: 5.5EPSS: 0%CPEs: 8EXPL: 0CVE-2022-48845 – MIPS: smp: fill in sibling and core maps earlier
https://notcve.org/view.php?id=CVE-2022-48845
In the Linux kernel, the following vulnerability has been resolved: MIPS: smp: fill in sibling and core maps earlier After enabling CONFIG_SCHED_CORE (landed during 5.14 cycle), 2-core 2-thread-per-core interAptiv (CPS-driven) started emitting the following: [ 0.025698] CPU1 revision is: 0001a120 (MIPS interAptiv (multi)) [ 0.048183] ------------[ cut here ]------------ [ 0.048187] WARNING: CPU: 1 PID: 0 at kernel/sched/core.c:6025 sched_core_cpu_starting+0x198/0x240 [ 0.048220] Modules linked in: [ 0.048233] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.17.0-rc3+ #35 b7b319f24073fd9a3c2aa7ad15fb7993eec0b26f [ 0.048247] Stack : 817f0000 00000004 327804c8 810eb050 00000000 00000004 00000000 c314fdd1 [ 0.048278] 830cbd64 819c0000 81800000 817f0000 83070bf4 00000001 830cbd08 00000000 [ 0.048307] 00000000 00000000 815fcbc4 00000000 00000000 00000000 00000000 00000000 [ 0.048334] 00000000 00000000 00000000 00000000 817f0000 00000000 00000000 817f6f34 [ 0.048361] 817f0000 818a3c00 817f0000 00000004 00000000 00000000 4dc33260 0018c933 [ 0.048389] ... [ 0.048396] Call Trace: [ 0.048399] [<8105a7bc>] show_stack+0x3c/0x140 [ 0.048424] [<8131c2a0>] dump_stack_lvl+0x60/0x80 [ 0.048440] [<8108b5c0>] __warn+0xc0/0xf4 [ 0.048454] [<8108b658>] warn_slowpath_fmt+0x64/0x10c [ 0.048467] [<810bd418>] sched_core_cpu_starting+0x198/0x240 [ 0.048483] [<810c6514>] sched_cpu_starting+0x14/0x80 [ 0.048497] [<8108c0f8>] cpuhp_invoke_callback_range+0x78/0x140 [ 0.048510] [<8108d914>] notify_cpu_starting+0x94/0x140 [ 0.048523] [<8106593c>] start_secondary+0xbc/0x280 [ 0.048539] [ 0.048543] ---[ end trace 0000000000000000 ]--- [ 0.048636] Synchronize counters for CPU 1: done. ...for each but CPU 0/boot. Basic debug printks right before the mentioned line say: [ 0.048170] CPU: 1, smt_mask: So smt_mask, which is sibling mask obviously, is empty when entering the function. This is critical, as sched_core_cpu_starting() calculates core-scheduling parameters only once per CPU start, and it's crucial to have all the parameters filled in at that moment (at least it uses cpu_smt_mask() which in fact is `&cpu_sibling_map[cpu]` on MIPS). A bit of debugging led me to that set_cpu_sibling_map() performing the actual map calculation, was being invocated after notify_cpu_start(), and exactly the latter function starts CPU HP callback round (sched_core_cpu_starting() is basically a CPU HP callback). While the flow is same on ARM64 (maps after the notifier, although before calling set_cpu_online()), x86 started calculating sibling maps earlier than starting the CPU HP callbacks in Linux 4.14 (see [0] for the reference). Neither me nor my brief tests couldn't find any potential caveats in calculating the maps right after performing delay calibration, but the WARN splat is now gone. The very same debug prints now yield exactly what I expected from them: [ 0.048433] CPU: 1, smt_mask: 0-1 [0] https://git.kernel.org/pub/scm/linux/kernel/git/mips/linux.git/commit/?id=76ce7cfe35ef En el kernel de Linux, se resolvió la siguiente vulnerabilidad: MIPS: smp: complete los mapas de hermanos y núcleos antes Después de habilitar CONFIG_SCHED_CORE (aterrizado durante el ciclo 5.14), se inició interAptiv de 2 núcleos y 2 subprocesos por núcleo (controlado por CPS) emitiendo lo siguiente: [0.025698] La revisión de CPU1 es: 0001a120 (MIPS interAptiv (multi)) [0.048183] ------------[ cortar aquí ]------------ [0.048187] ADVERTENCIA: CPU: 1 PID: 0 en kernel/sched/core.c:6025 sched_core_cpu_starting+0x198/0x240 [0.048220] Módulos vinculados en: [0.048233] CPU: 1 PID: 0 Comm: swapper/1 No contaminado 5.17 .0-rc3+ #35 b7b319f24073fd9a3c2aa7ad15fb7993eec0b26f [0.048247] Pila: 817f0000 00000004 327804c8 810eb050 00000000 00000004 00000000 c314fdd1 [ 0.048278] 830cbd64 819c0000 81800000 817f0000 83070bf4 00000001 830cbd08 00000000 [ 0.048307] 00000000 00000000 815fcbc 4 00000000 00000000 00000000 00000000 00000000 [ 0,048334] 00000000 00000000 00000000 00000000 817f0000 00000000 00000000 817f6f34 [ 0.048361] 817f0000 818a3c00 817f0000 00000004 00000000 00000000 4dc33260 0018c933 [ 0.048389] ... 0.048396] Seguimiento de llamadas: [ 0.048399] [<8105a7bc>] show_stack+0x3c/0x140 [ 0.048424] [<8131c2a0>] dump_stack_lvl+0x60 /0x80 [ 0.048440] [<8108b5c0>] __warn+0xc0/0xf4 [ 0.048454] [<8108b658>] warn_slowpath_fmt+0x64/0x10c [ 0.048467] [<810bd418>] 198/0x240 [ 0.048483] [<810c6514>] sched_cpu_starting +0x14/0x80 [ 0.048497] [<8108c0f8>] cpuhp_invoke_callback_range+0x78/0x140 [ 0.048510] [<8108d914>] notify_cpu_starting+0x94/0x140 [ 0.048523] [<8106593c>] _secundario+0xbc/0x280 [ 0,048539] [ 0,048543] - --[ end trace 0000000000000000 ]--- [ 0.048636] Sincronizar contadores para CPU 1: hecho. ...para cada uno menos CPU 0/arranque. Las impresiones de depuración básicas justo antes de la línea mencionada dicen: [0.048170] CPU: 1, smt_mask: Entonces smt_mask, que obviamente es una máscara hermana, está vacía al ingresar a la función. Esto es crítico, ya que sched_core_cpu_starting() calcula los parámetros de programación central solo una vez por inicio de CPU, y es crucial tener todos los parámetros completados en ese momento (al menos usa cpu_smt_mask() que de hecho es `&cpu_sibling_map[cpu]` en MIPS). • https://git.kernel.org/stable/c/7315f8538db009605ffba00370678142ef00ac98 https://git.kernel.org/stable/c/32813321f18d5432cec1b1a6ecc964f9ea26d565 https://git.kernel.org/stable/c/56eaacb8137ba2071ce48d4e3d91979270e139a7 https://git.kernel.org/stable/c/c2420bc3333111184cdcb112282d13afe1338dd7 https://git.kernel.org/stable/c/e8ad9ecc406974deb5e7c070f51cc1d09d21dc4b https://git.kernel.org/stable/c/be538b764a46be1d0700fd3b6e82fb76bd17f13a https://git.kernel.org/stable/c/94647aec80d03d6914aa664b7b8e103cd9d63239 https://git.kernel.org/stable/c/f2703def339c793674010cc9f01bfe498 •
CVSS: -EPSS: 0%CPEs: 3EXPL: 0CVE-2022-48844 – Bluetooth: hci_core: Fix leaking sent_cmd skb
https://notcve.org/view.php?id=CVE-2022-48844
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_core: Fix leaking sent_cmd skb sent_cmd memory is not freed before freeing hci_dev causing it to leak it contents. • https://git.kernel.org/stable/c/3679ccc09d8806686d579095ed504e045af7f7d6 https://git.kernel.org/stable/c/9473d06bd1c8da49eafb685aa95a290290c672dd https://git.kernel.org/stable/c/dd3b1dc3dd050f1f47cd13e300732852414270f8 •
CVSS: -EPSS: 0%CPEs: 5EXPL: 0CVE-2022-48843 – drm/vrr: Set VRR capable prop only if it is attached to connector
https://notcve.org/view.php?id=CVE-2022-48843
In the Linux kernel, the following vulnerability has been resolved: drm/vrr: Set VRR capable prop only if it is attached to connector VRR capable property is not attached by default to the connector It is attached only if VRR is supported. So if the driver tries to call drm core set prop function without it being attached that causes NULL dereference. • https://git.kernel.org/stable/c/941e8bcd2b2ba95490738e33dfeca27168452779 https://git.kernel.org/stable/c/0ba557d330946c23559aaea2d51ea649fdeca98a https://git.kernel.org/stable/c/3534c5c005ef99a1804ed50b8a72cdae254cabb5 https://git.kernel.org/stable/c/85271e92ae4f13aa679acaa6cf76b3c36bcb7bab https://git.kernel.org/stable/c/62929726ef0ec72cbbe9440c5d125d4278b99894 •
CVSS: 4.7EPSS: 0%CPEs: 3EXPL: 0CVE-2022-48842 – ice: Fix race condition during interface enslave
https://notcve.org/view.php?id=CVE-2022-48842
In the Linux kernel, the following vulnerability has been resolved: ice: Fix race condition during interface enslave Commit 5dbbbd01cbba83 ("ice: Avoid RTNL lock when re-creating auxiliary device") changes a process of re-creation of aux device so ice_plug_aux_dev() is called from ice_service_task() context. This unfortunately opens a race window that can result in dead-lock when interface has left LAG and immediately enters LAG again. Reproducer: ``` #!/bin/sh ip link add lag0 type bond mode 1 miimon 100 ip link set lag0 for n in {1..10}; do echo Cycle: $n ip link set ens7f0 master lag0 sleep 1 ip link set ens7f0 nomaster done ``` This results in: [20976.208697] Workqueue: ice ice_service_task [ice] [20976.213422] Call Trace: [20976.215871] __schedule+0x2d1/0x830 [20976.219364] schedule+0x35/0xa0 [20976.222510] schedule_preempt_disabled+0xa/0x10 [20976.227043] __mutex_lock.isra.7+0x310/0x420 [20976.235071] enum_all_gids_of_dev_cb+0x1c/0x100 [ib_core] [20976.251215] ib_enum_roce_netdev+0xa4/0xe0 [ib_core] [20976.256192] ib_cache_setup_one+0x33/0xa0 [ib_core] [20976.261079] ib_register_device+0x40d/0x580 [ib_core] [20976.266139] irdma_ib_register_device+0x129/0x250 [irdma] [20976.281409] irdma_probe+0x2c1/0x360 [irdma] [20976.285691] auxiliary_bus_probe+0x45/0x70 [20976.289790] really_probe+0x1f2/0x480 [20976.298509] driver_probe_device+0x49/0xc0 [20976.302609] bus_for_each_drv+0x79/0xc0 [20976.306448] __device_attach+0xdc/0x160 [20976.310286] bus_probe_device+0x9d/0xb0 [20976.314128] device_add+0x43c/0x890 [20976.321287] __auxiliary_device_add+0x43/0x60 [20976.325644] ice_plug_aux_dev+0xb2/0x100 [ice] [20976.330109] ice_service_task+0xd0c/0xed0 [ice] [20976.342591] process_one_work+0x1a7/0x360 [20976.350536] worker_thread+0x30/0x390 [20976.358128] kthread+0x10a/0x120 [20976.365547] ret_from_fork+0x1f/0x40 ... [20976.438030] task:ip state:D stack: 0 pid:213658 ppid:213627 flags:0x00004084 [20976.446469] Call Trace: [20976.448921] __schedule+0x2d1/0x830 [20976.452414] schedule+0x35/0xa0 [20976.455559] schedule_preempt_disabled+0xa/0x10 [20976.460090] __mutex_lock.isra.7+0x310/0x420 [20976.464364] device_del+0x36/0x3c0 [20976.467772] ice_unplug_aux_dev+0x1a/0x40 [ice] [20976.472313] ice_lag_event_handler+0x2a2/0x520 [ice] [20976.477288] notifier_call_chain+0x47/0x70 [20976.481386] __netdev_upper_dev_link+0x18b/0x280 [20976.489845] bond_enslave+0xe05/0x1790 [bonding] [20976.494475] do_setlink+0x336/0xf50 [20976.502517] __rtnl_newlink+0x529/0x8b0 [20976.543441] rtnl_newlink+0x43/0x60 [20976.546934] rtnetlink_rcv_msg+0x2b1/0x360 [20976.559238] netlink_rcv_skb+0x4c/0x120 [20976.563079] netlink_unicast+0x196/0x230 [20976.567005] netlink_sendmsg+0x204/0x3d0 [20976.570930] sock_sendmsg+0x4c/0x50 [20976.574423] ____sys_sendmsg+0x1eb/0x250 [20976.586807] ___sys_sendmsg+0x7c/0xc0 [20976.606353] __sys_sendmsg+0x57/0xa0 [20976.609930] do_syscall_64+0x5b/0x1a0 [20976.613598] entry_SYSCALL_64_after_hwframe+0x65/0xca 1. Command 'ip link ... set nomaster' causes that ice_plug_aux_dev() is called from ice_service_task() context, aux device is created and associated device->lock is taken. 2. Command 'ip link ... set master...' calls ice's notifier under RTNL lock and that notifier calls ice_unplug_aux_dev(). That function tries to take aux device->lock but this is already taken by ice_plug_aux_dev() in step 1 3. • https://git.kernel.org/stable/c/a9bbacc53d1f5ed8febbfdf31401d20e005f49ef https://git.kernel.org/stable/c/e1014fc5572375658fa421531cedb6e084f477dc https://git.kernel.org/stable/c/5cb1ebdbc4342b1c2ce89516e19808d64417bdbc • CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') CWE-667: Improper Locking •
CVSS: 5.5EPSS: 0%CPEs: 2EXPL: 0CVE-2022-48841 – ice: fix NULL pointer dereference in ice_update_vsi_tx_ring_stats()
https://notcve.org/view.php?id=CVE-2022-48841
In the Linux kernel, the following vulnerability has been resolved: ice: fix NULL pointer dereference in ice_update_vsi_tx_ring_stats() It is possible to do NULL pointer dereference in routine that updates Tx ring stats. Currently only stats and bytes are updated when ring pointer is valid, but later on ring is accessed to propagate gathered Tx stats onto VSI stats. Change the existing logic to move to next ring when ring is NULL. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ice: corrige la desreferencia del puntero NULL en ice_update_vsi_tx_ring_stats() Es posible realizar la desreferencia del puntero NULL en la rutina que actualiza las estadísticas del anillo Tx. Actualmente, solo se actualizan las estadísticas y los bytes cuando el puntero del anillo es válido, pero más adelante se accede al anillo para propagar las estadísticas de Tx recopiladas en las estadísticas de VSI. Cambie la lógica existente para pasar al siguiente anillo cuando el anillo sea NULL. • https://git.kernel.org/stable/c/e72bba21355dbb67512a0d666fec9f4b56dbfc2f https://git.kernel.org/stable/c/2397270ec97c5e3009a58ac110a25e1869e9d6ff https://git.kernel.org/stable/c/f153546913bada41a811722f2c6d17c3243a0333 • CWE-476: NULL Pointer Dereference •