Entreprise française de cybersécurité depuis 2004
☎ 03 60 47 09 81 - info@securiteinfo.com
☎ 03 60 47 09 81 - info@securiteinfo.com
In the Linux kernel, the following vulnerability has been resolved:Bluetooth: btnxpuart: Fix random crash seen while removing driverThis fixes the random kernel crash seen while removing the driver, whenrunning the load/unload test over multiple iterations.1) modprobe btnxpuart2) hciconfig hci0 reset3) hciconfig (check hci0 interface up with valid BD address)4) modprobe -r btnxpuartRepeat steps 1 to 4The ps_wakeup() call in btnxpuart_close() schedules the psdata->work(),which gets scheduled after module is removed, causing a kernel crash.This hidden issue got highlighted after enabling Power Save by defaultin 4183a7be7700 (Bluetooth: btnxpuart: Enable Power Save feature onstartup)The new ps_cleanup() deasserts UART break immediately while closingserdev device, cancels any scheduled ps_work and destroys the ps_lockmutex.[ 85.884604] Unable to handle kernel paging request at virtual address ffffd4a61638f258[ 85.884624] Mem abort info:[ 85.884625] ESR = 0x0000000086000007[ 85.884628] EC = 0x21: IABT (current EL), IL = 32 bits[ 85.884633] SET = 0, FnV = 0[ 85.884636] EA = 0, S1PTW = 0[ 85.884638] FSC = 0x07: level 3 translation fault[ 85.884642] swapper pgtable: 4k pages, 48-bit VAs, pgdp=0000000041dd0000[ 85.884646] [ffffd4a61638f258] pgd=1000000095fff003, p4d=1000000095fff003, pud=100000004823d003, pmd=100000004823e003, pte=0000000000000000[ 85.884662] Internal error: Oops: 0000000086000007 [#1] PREEMPT SMP[ 85.890932] Modules linked in: algif_hash algif_skcipher af_alg overlay fsl_jr_uio caam_jr caamkeyblob_desc caamhash_desc caamalg_desc crypto_engine authenc libdes crct10dif_ce polyval_ce polyval_generic snd_soc_imx_spdif snd_soc_imx_card snd_soc_ak5558 snd_soc_ak4458 caam secvio error snd_soc_fsl_spdif snd_soc_fsl_micfil snd_soc_fsl_sai snd_soc_fsl_utils gpio_ir_recv rc_core fuse [last unloaded: btnxpuart(O)][ 85.927297] CPU: 1 PID: 67 Comm: kworker/1:3 Tainted: G O 6.1.36+g937b1be4345a #1[ 85.936176] Hardware name: FSL i.MX8MM EVK board (DT)[ 85.936182] Workqueue: events 0xffffd4a61638f380[ 85.936198] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)[ 85.952817] pc : 0xffffd4a61638f258[ 85.952823] lr : 0xffffd4a61638f258[ 85.952827] sp : ffff8000084fbd70[ 85.952829] x29: ffff8000084fbd70 x28: 0000000000000000 x27: 0000000000000000[ 85.963112] x26: ffffd4a69133f000 x25: ffff4bf1c8540990 x24: ffff4bf215b87305[ 85.963119] x23: ffff4bf215b87300 x22: ffff4bf1c85409d0 x21: ffff4bf1c8540970[ 85.977382] x20: 0000000000000000 x19: ffff4bf1c8540880 x18: 0000000000000000[ 85.977391] x17: 0000000000000000 x16: 0000000000000133 x15: 0000ffffe2217090[ 85.977399] x14: 0000000000000001 x13: 0000000000000133 x12: 0000000000000139[ 85.977407] x11: 0000000000000001 x10: 0000000000000a60 x9 : ffff8000084fbc50[ 85.977417] x8 : ffff4bf215b7d000 x7 : ffff4bf215b83b40 x6 : 00000000000003e8[ 85.977424] x5 : 00000000410fd030 x4 : 0000000000000000 x3 : 0000000000000000[ 85.977432] x2 : 0000000000000000 x1 : ffff4bf1c4265880 x0 : 0000000000000000[ 85.977443] Call trace:[ 85.977446] 0xffffd4a61638f258[ 85.977451] 0xffffd4a61638f3e8[ 85.977455] process_one_work+0x1d4/0x330[ 85.977464] worker_thread+0x6c/0x430[ 85.977471] kthread+0x108/0x10c[ 85.977476] ret_from_fork+0x10/0x20[ 85.977488] Code: bad PC value[ 85.977491] ---[ end trace 0000000000000000 ]---Preset since v6.9.11
No PoCs from references.
- https://github.com/fkie-cad/nvd-json-data-feeds