CVSS: -EPSS: 0%CPEs: 5EXPL: 0CVE-2021-47202 – thermal: Fix NULL pointer dereferences in of_thermal_ functions
https://notcve.org/view.php?id=CVE-2021-47202
In the Linux kernel, the following vulnerability has been resolved: thermal: Fix NULL pointer dereferences in of_thermal_ functions of_parse_thermal_zones() parses the thermal-zones node and registers a thermal_zone device for each subnode. However, if a thermal zone is consuming a thermal sensor and that thermal sensor device hasn't probed yet, an attempt to set trip_point_*_temp for that thermal zone device can cause a NULL pointer dereference. Fix it. console:/sys/class/thermal/thermal_zone87 # echo 120000 > trip_point_0_temp ... Unable to handle kernel NULL pointer dereference at virtual address 0000000000000020 ... Call trace: of_thermal_set_trip_temp+0x40/0xc4 trip_point_temp_store+0xc0/0x1dc dev_attr_store+0x38/0x88 sysfs_kf_write+0x64/0xc0 kernfs_fop_write_iter+0x108/0x1d0 vfs_write+0x2f4/0x368 ksys_write+0x7c/0xec __arm64_sys_write+0x20/0x30 el0_svc_common.llvm.7279915941325364641+0xbc/0x1bc do_el0_svc+0x28/0xa0 el0_svc+0x14/0x24 el0_sync_handler+0x88/0xec el0_sync+0x1c0/0x200 While at it, fix the possible NULL pointer dereference in other functions as well: of_thermal_get_temp(), of_thermal_set_emul_temp(), of_thermal_get_trend(). • https://git.kernel.org/stable/c/828f4c31684da94ecf0b44a2cbd35bbede04f0bd https://git.kernel.org/stable/c/6a315471cb6a07f651e1d3adc8962730f4fcccac https://git.kernel.org/stable/c/0750f769b95841b34a9fe8c418dd792ff526bf86 https://git.kernel.org/stable/c/ef2590a5305e0b8e9342f84c2214aa478ee7f28e https://git.kernel.org/stable/c/96cfe05051fd8543cdedd6807ec59a0e6c409195 •
CVSS: 7.8EPSS: 0%CPEs: 2EXPL: 0CVE-2021-47198 – scsi: lpfc: Fix use-after-free in lpfc_unreg_rpi() routine
https://notcve.org/view.php?id=CVE-2021-47198
In the Linux kernel, the following vulnerability has been resolved: scsi: lpfc: Fix use-after-free in lpfc_unreg_rpi() routine An error is detected with the following report when unloading the driver: "KASAN: use-after-free in lpfc_unreg_rpi+0x1b1b" The NLP_REG_LOGIN_SEND nlp_flag is set in lpfc_reg_fab_ctrl_node(), but the flag is not cleared upon completion of the login. This allows a second call to lpfc_unreg_rpi() to proceed with nlp_rpi set to LPFC_RPI_ALLOW_ERROR. This results in a use after free access when used as an rpi_ids array index. Fix by clearing the NLP_REG_LOGIN_SEND nlp_flag in lpfc_mbx_cmpl_fc_reg_login(). En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: scsi: lpfc: Fix use-after-free en la rutina lpfc_unreg_rpi() Se detecta un error con el siguiente reporte al descargar el driver: "KASAN: use-after-free en lpfc_unreg_rpi +0x1b1b" El NLP_REG_LOGIN_SEND nlp_flag está configurado en lpfc_reg_fab_ctrl_node(), pero el indicador no se borra al finalizar el inicio de sesión. Esto permite una segunda llamada a lpfc_unreg_rpi() para continuar con nlp_rpi configurado en LPFC_RPI_ALLOW_ERROR. Esto da como resultado un acceso de use after free cuando se usa como índice de matriz rpi_ids. • https://git.kernel.org/stable/c/dbebf865b3239595c1d4dba063b122862583b52a https://git.kernel.org/stable/c/79b20beccea3a3938a8500acef4e6b9d7c66142f • CWE-416: Use After Free •
CVSS: 5.5EPSS: 0%CPEs: 2EXPL: 0CVE-2021-47193 – scsi: pm80xx: Fix memory leak during rmmod
https://notcve.org/view.php?id=CVE-2021-47193
In the Linux kernel, the following vulnerability has been resolved: scsi: pm80xx: Fix memory leak during rmmod Driver failed to release all memory allocated. This would lead to memory leak during driver removal. Properly free memory when the module is removed. En el kernel de Linux, se resolvió la siguiente vulnerabilidad: scsi: pm80xx: se corrigió la pérdida de memoria durante rmmod, el controlador no pudo liberar toda la memoria asignada. Esto puede provocar una pérdida de memoria durante la eliminación del controlador. Se debe liberar correctamente la memoria cuando se retire el módulo. • https://git.kernel.org/stable/c/269a4311b15f68d24e816f43f123888f241ed13d https://git.kernel.org/stable/c/51e6ed83bb4ade7c360551fa4ae55c4eacea354b • CWE-401: Missing Release of Memory after Effective Lifetime •
CVSS: -EPSS: 0%CPEs: 3EXPL: 0CVE-2021-47191 – scsi: scsi_debug: Fix out-of-bound read in resp_readcap16()
https://notcve.org/view.php?id=CVE-2021-47191
In the Linux kernel, the following vulnerability has been resolved: scsi: scsi_debug: Fix out-of-bound read in resp_readcap16() The following warning was observed running syzkaller: [ 3813.830724] sg_write: data in/out 65466/242 bytes for SCSI command 0x9e-- guessing data in; [ 3813.830724] program syz-executor not setting count and/or reply_len properly [ 3813.836956] ================================================================== [ 3813.839465] BUG: KASAN: stack-out-of-bounds in sg_copy_buffer+0x157/0x1e0 [ 3813.841773] Read of size 4096 at addr ffff8883cf80f540 by task syz-executor/1549 [ 3813.846612] Call Trace: [ 3813.846995] dump_stack+0x108/0x15f [ 3813.847524] print_address_description+0xa5/0x372 [ 3813.848243] kasan_report.cold+0x236/0x2a8 [ 3813.849439] check_memory_region+0x240/0x270 [ 3813.850094] memcpy+0x30/0x80 [ 3813.850553] sg_copy_buffer+0x157/0x1e0 [ 3813.853032] sg_copy_from_buffer+0x13/0x20 [ 3813.853660] fill_from_dev_buffer+0x135/0x370 [ 3813.854329] resp_readcap16+0x1ac/0x280 [ 3813.856917] schedule_resp+0x41f/0x1630 [ 3813.858203] scsi_debug_queuecommand+0xb32/0x17e0 [ 3813.862699] scsi_dispatch_cmd+0x330/0x950 [ 3813.863329] scsi_request_fn+0xd8e/0x1710 [ 3813.863946] __blk_run_queue+0x10b/0x230 [ 3813.864544] blk_execute_rq_nowait+0x1d8/0x400 [ 3813.865220] sg_common_write.isra.0+0xe61/0x2420 [ 3813.871637] sg_write+0x6c8/0xef0 [ 3813.878853] __vfs_write+0xe4/0x800 [ 3813.883487] vfs_write+0x17b/0x530 [ 3813.884008] ksys_write+0x103/0x270 [ 3813.886268] __x64_sys_write+0x77/0xc0 [ 3813.886841] do_syscall_64+0x106/0x360 [ 3813.887415] entry_SYSCALL_64_after_hwframe+0x44/0xa9 This issue can be reproduced with the following syzkaller log: r0 = openat(0xffffffffffffff9c, &(0x7f0000000040)='./file0\x00', 0x26e1, 0x0) r1 = syz_open_procfs(0xffffffffffffffff, &(0x7f0000000000)='fd/3\x00') open_by_handle_at(r1, &(0x7f00000003c0)=ANY=[@ANYRESHEX], 0x602000) r2 = syz_open_dev$sg(&(0x7f0000000000), 0x0, 0x40782) write$binfmt_aout(r2, &(0x7f0000000340)=ANY=[@ANYBLOB="00000000deff000000000000000000000000000000000000000000000000000047f007af9e107a41ec395f1bded7be24277a1501ff6196a83366f4e6362bc0ff2b247f68a972989b094b2da4fb3607fcf611a22dd04310d28c75039d"], 0x126) In resp_readcap16() we get "int alloc_len" value -1104926854, and then pass the huge arr_len to fill_from_dev_buffer(), but arr is only 32 bytes. This leads to OOB in sg_copy_buffer(). To solve this issue, define alloc_len as u32. • https://git.kernel.org/stable/c/3e20cb072679bdb47747ccc8bee3233a4cf0765a https://git.kernel.org/stable/c/5b8bed6464ad6653586e30df046185fd816ad999 https://git.kernel.org/stable/c/4e3ace0051e7e504b55d239daab8789dd89b863c •
CVSS: -EPSS: 0%CPEs: 4EXPL: 0CVE-2021-47187 – arm64: dts: qcom: msm8998: Fix CPU/L2 idle state latency and residency
https://notcve.org/view.php?id=CVE-2021-47187
In the Linux kernel, the following vulnerability has been resolved: arm64: dts: qcom: msm8998: Fix CPU/L2 idle state latency and residency The entry/exit latency and minimum residency in state for the idle states of MSM8998 were ..bad: first of all, for all of them the timings were written for CPU sleep but the min-residency-us param was miscalculated (supposedly, while porting this from downstream); Then, the power collapse states are setting PC on both the CPU cluster *and* the L2 cache, which have different timings: in the specific case of L2 the times are higher so these ones should be taken into account instead of the CPU ones. This parameter misconfiguration was not giving particular issues because on MSM8998 there was no CPU scaling at all, so cluster/L2 power collapse was rarely (if ever) hit. When CPU scaling is enabled, though, the wrong timings will produce SoC unstability shown to the user as random, apparently error-less, sudden reboots and/or lockups. This set of parameters are stabilizing the SoC when CPU scaling is ON and when power collapse is frequently hit. • https://git.kernel.org/stable/c/a14d7038ea201c5526375becfc43b9ba281b1e82 https://git.kernel.org/stable/c/e52fecdd0c142b95c720683885b06ee3f0e065c8 https://git.kernel.org/stable/c/118c826ef8b43efe0fda8faf419673707ee8c5e5 https://git.kernel.org/stable/c/3f1dcaff642e75c1d2ad03f783fa8a3b1f56dd50 •