CVSS: -EPSS: 0%CPEs: 5EXPL: 0CVE-2024-50032 – rcu/nocb: Fix rcuog wake-up from offline softirq
https://notcve.org/view.php?id=CVE-2024-50032
In the Linux kernel, the following vulnerability has been resolved: rcu/nocb: Fix rcuog wake-up from offline softirq After a CPU has set itself offline and before it eventually calls rcutree_report_cpu_dead(), there are still opportunities for callbacks to be enqueued, for example from a softirq. When that happens on NOCB, the rcuog wake-up is deferred through an IPI to an online CPU in order not to call into the scheduler and risk arming the RT-bandwidth after hrtimers have been migrated out and disabled. But performing a synchronized IPI from a softirq is buggy as reported in the following scenario: WARNING: CPU: 1 PID: 26 at kernel/smp.c:633 smp_call_function_single Modules linked in: rcutorture torture CPU: 1 UID: 0 PID: 26 Comm: migration/1 Not tainted 6.11.0-rc1-00012-g9139f93209d1 #1 Stopper: multi_cpu_stop+0x0/0x320 <- __stop_cpus+0xd0/0x120 RIP: 0010:smp_call_function_single <IRQ> swake_up_one_online __call_rcu_nocb_wake __call_rcu_common ? rcu_torture_one_read call_timer_fn __run_timers run_timer_softirq handle_softirqs irq_exit_rcu ? tick_handle_periodic sysvec_apic_timer_interrupt </IRQ> Fix this with forcing deferred rcuog wake up through the NOCB timer when the CPU is offline. The actual wake up will happen from rcutree_report_cpu_dead(). • https://git.kernel.org/stable/c/9b52ee18f6d2f0e845b0dd5ba35edc02ba318827 https://git.kernel.org/stable/c/00a611229bfad075660181c53e054ff544d3ac34 https://git.kernel.org/stable/c/9139f93209d1ffd7f489ab19dee01b7c3a1a43d2 https://git.kernel.org/stable/c/ec2777e57f2f548702b147c6e5cc088079bd93ca https://git.kernel.org/stable/c/bbeaae6f79b2923cf8b8f191d039b19f11adf045 https://git.kernel.org/stable/c/84a5feebba10354c683983f5f1372a144225e4c2 https://git.kernel.org/stable/c/e66b1e01f2eb3209d08122572f41f7838b79540d https://git.kernel.org/stable/c/f7345ccc62a4b880cf76458db5f320725 •
CVSS: -EPSS: 0%CPEs: 5EXPL: 0CVE-2024-50031 – drm/v3d: Stop the active perfmon before being destroyed
https://notcve.org/view.php?id=CVE-2024-50031
In the Linux kernel, the following vulnerability has been resolved: drm/v3d: Stop the active perfmon before being destroyed When running `kmscube` with one or more performance monitors enabled via `GALLIUM_HUD`, the following kernel panic can occur: [ 55.008324] Unable to handle kernel paging request at virtual address 00000000052004a4 [ 55.008368] Mem abort info: [ 55.008377] ESR = 0x0000000096000005 [ 55.008387] EC = 0x25: DABT (current EL), IL = 32 bits [ 55.008402] SET = 0, FnV = 0 [ 55.008412] EA = 0, S1PTW = 0 [ 55.008421] FSC = 0x05: level 1 translation fault [ 55.008434] Data abort info: [ 55.008442] ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000 [ 55.008455] CM = 0, WnR = 0, TnD = 0, TagAccess = 0 [ 55.008467] GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 [ 55.008481] user pgtable: 4k pages, 39-bit VAs, pgdp=00000001046c6000 [ 55.008497] [00000000052004a4] pgd=0000000000000000, p4d=0000000000000000, pud=0000000000000000 [ 55.008525] Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP [ 55.008542] Modules linked in: rfcomm [...] vc4 v3d snd_soc_hdmi_codec drm_display_helper gpu_sched drm_shmem_helper cec drm_dma_helper drm_kms_helper i2c_brcmstb drm drm_panel_orientation_quirks snd_soc_core snd_compress snd_pcm_dmaengine snd_pcm snd_timer snd backlight [ 55.008799] CPU: 2 PID: 166 Comm: v3d_bin Tainted: G C 6.6.47+rpt-rpi-v8 #1 Debian 1:6.6.47-1+rpt1 [ 55.008824] Hardware name: Raspberry Pi 4 Model B Rev 1.5 (DT) [ 55.008838] pstate: 20000005 (nzCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 55.008855] pc : __mutex_lock.constprop.0+0x90/0x608 [ 55.008879] lr : __mutex_lock.constprop.0+0x58/0x608 [ 55.008895] sp : ffffffc080673cf0 [ 55.008904] x29: ffffffc080673cf0 x28: 0000000000000000 x27: ffffff8106188a28 [ 55.008926] x26: ffffff8101e78040 x25: ffffff8101baa6c0 x24: ffffffd9d989f148 [ 55.008947] x23: ffffffda1c2a4008 x22: 0000000000000002 x21: ffffffc080673d38 [ 55.008968] x20: ffffff8101238000 x19: ffffff8104f83188 x18: 0000000000000000 [ 55.008988] x17: 0000000000000000 x16: ffffffda1bd04d18 x15: 00000055bb08bc90 [ 55.009715] x14: 0000000000000000 x13: 0000000000000000 x12: ffffffda1bd4cbb0 [ 55.010433] x11: 00000000fa83b2da x10: 0000000000001a40 x9 : ffffffda1bd04d04 [ 55.011162] x8 : ffffff8102097b80 x7 : 0000000000000000 x6 : 00000000030a5857 [ 55.011880] x5 : 00ffffffffffffff x4 : 0300000005200470 x3 : 0300000005200470 [ 55.012598] x2 : ffffff8101238000 x1 : 0000000000000021 x0 : 0300000005200470 [ 55.013292] Call trace: [ 55.013959] __mutex_lock.constprop.0+0x90/0x608 [ 55.014646] __mutex_lock_slowpath+0x1c/0x30 [ 55.015317] mutex_lock+0x50/0x68 [ 55.015961] v3d_perfmon_stop+0x40/0xe0 [v3d] [ 55.016627] v3d_bin_job_run+0x10c/0x2d8 [v3d] [ 55.017282] drm_sched_main+0x178/0x3f8 [gpu_sched] [ 55.017921] kthread+0x11c/0x128 [ 55.018554] ret_from_fork+0x10/0x20 [ 55.019168] Code: f9400260 f1001c1f 54001ea9 927df000 (b9403401) [ 55.019776] ---[ end trace 0000000000000000 ]--- [ 55.020411] note: v3d_bin[166] exited with preempt_count 1 This issue arises because, upon closing the file descriptor (which happens when we interrupt `kmscube`), the active performance monitor is not stopped. Although all perfmons are destroyed in `v3d_perfmon_close_file()`, the active performance monitor's pointer (`v3d->active_perfmon`) is still retained. If `kmscube` is run again, the driver will attempt to stop the active performance monitor using the stale pointer in `v3d->active_perfmon`. However, this pointer is no longer valid because the previous process has already terminated, and all performance monitors associated with it have been destroyed and freed. To fix this, when the active performance monitor belongs to a given process, explicitly stop it before destroying and freeing it. • https://git.kernel.org/stable/c/26a4dc29b74a137f45665089f6d3d633fcc9b662 https://git.kernel.org/stable/c/24ab54a066d2ef671b03eb909ca2114c0c9ac1e7 https://git.kernel.org/stable/c/0c9e9a3a4873705740b19300cadc6599170646ef https://git.kernel.org/stable/c/07c51108d9e278831c16191d1223ee49986e7890 https://git.kernel.org/stable/c/333767cbce6ac20ec794c76eec82ed0ef55022db https://git.kernel.org/stable/c/7d1fd3638ee3a9f9bca4785fffb638ca19120718 •
CVSS: -EPSS: 0%CPEs: 2EXPL: 0CVE-2024-50030 – drm/xe/ct: prevent UAF in send_recv()
https://notcve.org/view.php?id=CVE-2024-50030
In the Linux kernel, the following vulnerability has been resolved: drm/xe/ct: prevent UAF in send_recv() Ensure we serialize with completion side to prevent UAF with fence going out of scope on the stack, since we have no clue if it will fire after the timeout before we can erase from the xa. Also we have some dependent loads and stores for which we need the correct ordering, and we lack the needed barriers. Fix this by grabbing the ct->lock after the wait, which is also held by the completion side. v2 (Badal): - Also print done after acquiring the lock and seeing timeout. (cherry picked from commit 52789ce35c55ccd30c4b67b9cc5b2af55e0122ea) • https://git.kernel.org/stable/c/dd08ebf6c3525a7ea2186e636df064ea47281987 https://git.kernel.org/stable/c/8ed7dd4c55e4fb21531a9645aeb66a30eaf43a46 https://git.kernel.org/stable/c/db7f92af626178ba59dbbcdd5dee9ec24a987a88 •
CVSS: -EPSS: 0%CPEs: 3EXPL: 0CVE-2024-50029 – Bluetooth: hci_conn: Fix UAF in hci_enhanced_setup_sync
https://notcve.org/view.php?id=CVE-2024-50029
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_conn: Fix UAF in hci_enhanced_setup_sync This checks if the ACL connection remains valid as it could be destroyed while hci_enhanced_setup_sync is pending on cmd_sync leading to the following trace: BUG: KASAN: slab-use-after-free in hci_enhanced_setup_sync+0x91b/0xa60 Read of size 1 at addr ffff888002328ffd by task kworker/u5:2/37 CPU: 0 UID: 0 PID: 37 Comm: kworker/u5:2 Not tainted 6.11.0-rc6-01300-g810be445d8d6 #7099 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-2.fc40 04/01/2014 Workqueue: hci0 hci_cmd_sync_work Call Trace: <TASK> dump_stack_lvl+0x5d/0x80 ? hci_enhanced_setup_sync+0x91b/0xa60 print_report+0x152/0x4c0 ? hci_enhanced_setup_sync+0x91b/0xa60 ? __virt_addr_valid+0x1fa/0x420 ? hci_enhanced_setup_sync+0x91b/0xa60 kasan_report+0xda/0x1b0 ? • https://git.kernel.org/stable/c/e07a06b4eb417f5271d33ce2240e93c62d98b7b4 https://git.kernel.org/stable/c/867639300759e3e1c5b1e1a5ff89231f263a32a7 https://git.kernel.org/stable/c/98ccd44002d88cbf4edfc4480df532a3da5a013e https://git.kernel.org/stable/c/18fd04ad856df07733f5bb07e7f7168e7443d393 •
CVSS: -EPSS: 0%CPEs: 2EXPL: 0CVE-2024-50028 – thermal: core: Reference count the zone in thermal_zone_get_by_id()
https://notcve.org/view.php?id=CVE-2024-50028
In the Linux kernel, the following vulnerability has been resolved: thermal: core: Reference count the zone in thermal_zone_get_by_id() There are places in the thermal netlink code where nothing prevents the thermal zone object from going away while being accessed after it has been returned by thermal_zone_get_by_id(). To address this, make thermal_zone_get_by_id() get a reference on the thermal zone device object to be returned with the help of get_device(), under thermal_list_lock, and adjust all of its callers to this change with the help of the cleanup.h infrastructure. • https://git.kernel.org/stable/c/1ce50e7d408ef2bdc8ca021363fd46d1b8bfad00 https://git.kernel.org/stable/c/c95538b286efc6109c987e97a051bc7844ede802 https://git.kernel.org/stable/c/a42a5839f400e929c489bb1b58f54596c4535167 •