Affected: Alpaquita:25: linux-lts, Alpaquita:stream: linux-lts

In the Linux kernel, the following vulnerability has been resolved:

thermal: core: Fix NULL pointer dereference in zone registration error path

If device_register() in thermal_zone_device_register_with_trips() returns an error, the tz variable is set to NULL and subsequently dereferenced in kfree(tz->tzp).

Commit adc8749b150c ("thermal/drivers/core: Use put_device() if device_register() fails") added the tz = NULL assignment in question to avoid a possible double-free after dropping the reference to the zone device. However, after commit 4649620d9404 ("thermal: core: Make thermal_zone_device_unregister() return after freeing the zone"), that assignment has become redundant, because dropping the reference to the zone device does not cause the zone object to be freed any more.

Drop it to address the NULL pointer dereference.

In the Linux kernel, the following vulnerability has been resolved:

thermal: core: Fix NULL pointer dereference in zone registration error path

If device_register() in thermal_zone_device_register_with_trips() returns an error, the tz variable is set to NULL and subsequently dereferenced in kfree(tz->tzp).

Commit adc8749b150c ("thermal/drivers/core: Use put_device() if device_register() fails") added the tz = NULL assignment in question to avoid a possible double-free after dropping the reference to the zone device. However, after commit 4649620d9404 ("thermal: core: Make thermal_zone_device_unregister() return after freeing the zone"), that assignment has become redundant, because dropping the reference to the zone device does not cause the zone object to be freed any more.

Drop it to address the NULL pointer dereference.

kernel: use after free in i2c kernel: bluetooth: BR/EDR Bluetooth Impersonation Attacks (BIAS) kernel: hwmon: (lm90) Prevent integer overflow/underflow in hysteresis calculations kernel: asix: fix uninit-value in asix_mdio_read() kernel: tty: tty_buffer: Fix the softlockup issue in flush_to_ldisc kernel: hwmon: (w83793) Fix NULL pointer dereference by removing unnecessary structure field kernel: hwmon: (w83791d) Fix NULL pointer dereference by removing unnecessary structure field kernel: powerpc/64s: fix program check interrupt emergency stack path kernel: powerpc/64s: Fix unrecoverable MCE calling async handler from NMI kernel: lib/generic-radix-tree.c: Don't overflow in peek() kernel: powerpc/smp: do not decrement idle task preempt count in CPU offline kernel: can: isotp: isotp_sendmsg(): add result check for wait_event_interruptible() kernel: usbnet: sanity check for maxpacket kernel: nvmem: Fix shift-out-of-bound (UBSAN) with byte size cells kernel: aio: fix use-after-free due to missing POLLFREE handling kernel: powerpc/pseries: Fix potential memleak in papr_get_attr() kernel: of: fdt: fix off-by-one error in unflatten_dt_nodes() kernel: thermal/int340x_thermal: handle data_vault when the value is ZERO_SIZE_PTR kernel: vt_ioctl: fix array_index_nospec in vt_setactivate kernel: bpf: Fix crash due to out of bounds access into reg2btf_ids. kernel: lz4: fix LZ4_decompress_safe_partial read out of bound kernel: x86/mce: Work around an erratum on fast string copy instructions…

Affected: Ubuntu:16.04:LTS: linux-hwe-edge, Ubuntu:18.04:LTS: linux-aws-5.0, Ubuntu:18.04:LTS: linux-aws-5.3, Ubuntu:18.04:LTS: linux-azure, Ubuntu:18.04:LTS: linux-azure-5.3, Ubuntu:18.04:LTS: linux-azure-edge, Ubuntu:18.04:LTS: linux-gcp, Ubuntu:18.04:LTS: linux-gcp-5.3, Ubuntu:18.04:LTS: linux-gke-4.15, Ubuntu:18.04:LTS: linux-gke-5.4 and 65 more

In the Linux kernel, the following vulnerability has been resolved: thermal: core: Fix NULL pointer dereference in zone registration error path If device_register() in thermal_zone_device_register_with_trips() returns an error, the tz variable is set to NULL and subsequently dereferenced in kfree(tz->tzp). Commit adc8749b150c ("thermal/drivers/core: Use put_device() if device_register() fails") added the tz = NULL assignment in question to avoid a possible double-free after dropping the reference to the zone device. However, after commit 4649620d9404 ("thermal: core: Make thermal_zone_device_unregister() return after freeing the zone"), that assignment has become redundant, because dropping the reference to the zone device does not cause the zone object to be freed any more. Drop it to address the NULL pointer dereference.

Ein lokaler Angreifer kann mehrere Schwachstellen im Linux-Kernel ausnutzen, um einen Denial-of-Service-Zustand herbeizuführen oder einen nicht spezifizierten Angriff durchzuführen.