soc: bcm: brcmstb: pm: pm-arm: Fix refcount leak in brcmstb_pm_probe
In the Linux kernel, the following vulnerability has been resolved:
soc: bcm: brcmstb: pm: pm-arm: Fix refcount leak in brcmstb_pm_probe
of_find_matching_node() returns a node pointer with refcount
incremented, we should use of_node_put() on it when not need anymore.
Add missing of_node_put() to avoid refcount leak.
In brcmstb_init_sram, it pass dn to of_address_to_resource(),
of_address_to_resource() will call of_find_device_by_node() to take
reference, so we should release the reference returned by
of_find_matching_node().
In the Linux kernel, the following vulnerability has been resolved:
ARM: cns3xxx: Fix refcount leak in cns3xxx_init
of_find_compatible_node() returns a node pointer with refcount
incremented, we should use of_node_put() on it when done.
Add missing of_node_put() to avoid refcount leak.
dm raid: fix accesses beyond end of raid member array
In the Linux kernel, the following vulnerability has been resolved:
dm raid: fix accesses beyond end of raid member array
On dm-raid table load (using raid_ctr), dm-raid allocates an array
rs->devs[rs->raid_disks] for the raid device members. rs->raid_disks
is defined by the number of raid metadata and image tupples passed
into the target's constructor.
In the case of RAID layout changes being requested, that number can be
different from the current number of members for existing raid sets as
defined in their superblocks. Example RAID layout changes include:
- raid1 legs being added/removed
- raid4/5/6/10 number of stripes changed (stripe
In the Linux kernel, the following vulnerability has been resolved:
dm raid: fix KASAN warning in raid5_add_disks
There's a KASAN warning in raid5_add_disk when running the LVM testsuite.
The warning happens in the test
lvconvert-raid-reshape-linear_to_raid6-single-type.sh. We fix the warning
by verifying that rdev->saved_raid_disk is within limits.
In the Linux kernel, the following vulnerability has been resolved:
net: tun: unlink NAPI from device on destruction
Syzbot found a race between tun file and device destruction.
NAPIs live in struct tun_file which can get destroyed before
the netdev so we have to del them explicitly. The current
code is missing deleting the NAPI if the queue was detached
first.
net: bonding: fix use-after-free after 802.3ad slave unbind
In the Linux kernel, the following vulnerability has been resolved:
net: bonding: fix use-after-free after 802.3ad slave unbind
commit 0622cab0341c ("bonding: fix 802.3ad aggregator reselection"),
resolve case, when there is several aggregation groups in the same bond.
bond_3ad_unbind_slave will invalidate (clear) aggregator when
__agg_active_ports return zero. So, ad_clear_agg can be executed even, when
num_of_ports!=0. Than bond_3ad_unbind_slave can be executed again for,
previously cleared aggregator. NOTE: at this time bond_3ad_unbind_slave
will not update slave ports list, because lag_ports==NULL. So, here we
got slave ports, pointing
In the Linux kernel, the following vulnerability has been resolved:
can: gs_usb: gs_usb_open/close(): fix memory leak
The gs_usb driver appears to suffer from a malady common to many USB
CAN adapter drivers in that it performs usb_alloc_coherent() to
allocate a number of USB request blocks (URBs) for RX, and then later
relies on usb_kill_anchored_urbs() to free them, but this doesn't
actually free them. As a result, this may be leaking DMA memory that's
been used by the driver.
This commit is an adaptation of the techniques found in the esd_usb2
driver where a similar design pattern led to a memory leak. It
explicitly frees the RX URBs and
In the Linux kernel, the following vulnerability has been resolved:
usbnet: fix memory leak in error case
usbnet_write_cmd_async() mixed up which buffers
need to be freed in which error case.
v2: add Fixes tag
v3: fix uninitialized buf pointer
ARM: meson: Fix refcount leak in meson_smp_prepare_cpus
In the Linux kernel, the following vulnerability has been resolved:
ARM: meson: Fix refcount leak in meson_smp_prepare_cpus
of_find_compatible_node() returns a node pointer with refcount
incremented, we should use of_node_put() on it when done.
Add missing of_node_put() to avoid refcount leak.
dmaengine: ti: Fix refcount leak in ti_dra7_xbar_route_allocate
In the Linux kernel, the following vulnerability has been resolved:
dmaengine: ti: Fix refcount leak in ti_dra7_xbar_route_allocate
of_parse_phandle() returns a node pointer with refcount
incremented, we should use of_node_put() on it when not needed anymore.
Add missing of_node_put() in to fix this.
xen/netback: avoid entering xenvif_rx_next_skb() with an empty rx queue
In the Linux kernel, the following vulnerability has been resolved:
xen/netback: avoid entering xenvif_rx_next_skb() with an empty rx queue
xenvif_rx_next_skb() is expecting the rx queue not being empty, but
in case the loop in xenvif_rx_action() is doing multiple iterations,
the availability of another skb in the rx queue is not being checked.
This can lead to crashes:
[40072.537261] BUG: unable to handle kernel NULL pointer dereference at 0000000000000080
[40072.537407] IP: xenvif_rx_skb+0x23/0x590 [xen_netback]
[40072.537534] PGD 0 P4D 0
[40072.537644] Oops: 0000 [#1] SMP NOPTI
[40072.537749] CPU: 0 PID: 12505 Comm: v1-c40247-q2-gu Not
cgroup: Use separate src/dst nodes when preloading css_sets for migration
In the Linux kernel, the following vulnerability has been resolved:
cgroup: Use separate src/dst nodes when preloading css_sets for migration
Each cset (css_set) is pinned by its tasks. When we're moving tasks around
across csets for a migration, we need to hold the source and destination
csets to ensure that they don't go away while we're moving tasks about. This
is done by linking cset->mg_preload_node on either the
mgctx->preloaded_src_csets or mgctx->preloaded_dst_csets list. Using the
same cset->mg_preload_node for both the src and dst lists was deemed okay as
a cset can't be both the source and destination at the same time.
Unfortuna
In the Linux kernel, the following vulnerability has been resolved:
cipso: Fix data-races around sysctl.
While reading cipso sysctl variables, they can be changed concurrently.
So, we need to add READ_ONCE() to avoid data-races.
In the Linux kernel, the following vulnerability has been resolved:
icmp: Fix data-races around sysctl.
While reading icmp sysctl variables, they can be changed concurrently.
So, we need to add READ_ONCE() to avoid data-races.
In the Linux kernel, the following vulnerability has been resolved:
sfc: fix use after free when disabling sriov
Use after free is detected by kfence when disabling sriov. What was read
after being freed was vf->pci_dev: it was freed from pci_disable_sriov
and later read in efx_ef10_sriov_free_vf_vports, called from
efx_ef10_sriov_free_vf_vswitching.
Set the pointer to NULL at release time to not trying to read it later.
Reproducer and dmesg log (note that kfence doesn't detect it every time):
$ echo 1 > /sys/class/net/enp65s0f0np0/device/sriov_numvfs
$ echo 0 > /sys/class/net/enp65s0f0np0/device/sriov_numvfs
BUG: KFENCE: use-after-free
In the Linux kernel, the following vulnerability has been resolved:
sfc: fix kernel panic when creating VF
When creating VFs a kernel panic can happen when calling to
efx_ef10_try_update_nic_stats_vf.
When releasing a DMA coherent buffer, sometimes, I don't know in what
specific circumstances, it has to unmap memory with vunmap. It is
disallowed to do that in IRQ context or with BH disabled. Otherwise, we
hit this line in vunmap, causing the crash:
BUG_ON(in_interrupt());
This patch reenables BH to release the buffer.
Log messages when the bug is hit:
kernel BUG at mm/vmalloc.c:2727!
invalid opcode: 0000 [#1] PREEMPT SMP NOPTI
CPU:
In the Linux kernel, the following vulnerability has been resolved:
cpufreq: pmac32-cpufreq: Fix refcount leak bug
In pmac_cpufreq_init_MacRISC3(), we need to add corresponding
of_node_put() for the three node pointers whose refcount have
been incremented by of_find_node_by_name().
net: tipc: fix possible refcount leak in tipc_sk_create()
In the Linux kernel, the following vulnerability has been resolved:
net: tipc: fix possible refcount leak in tipc_sk_create()
Free sk in case tipc_sk_insert() fails.
In the Linux kernel, the following vulnerability has been resolved:
net: sfp: fix memory leak in sfp_probe()
sfp_probe() allocates a memory chunk from sfp with sfp_alloc(). When
devm_add_action() fails, sfp is not freed, which leads to a memory leak.
We should use devm_add_action_or_reset() instead of devm_add_action().
In the Linux kernel, the following vulnerability has been resolved:
x86/speculation: Fill RSB on vmexit for IBRS
Prevent RSB underflow/poisoning attacks with RSB. While at it, add a
bunch of comments to attempt to document the current state of tribal
knowledge about RSB attacks and what exactly is being mitigated.