ocfs2: fix circular locking dependency in ocfs2_dio_end_io_write
In the Linux kernel, the following vulnerability has been resolved:
ocfs2: fix circular locking dependency in ocfs2_dio_end_io_write
A circular locking dependency involves INODE_ALLOC_SYSTEM_INODE,
EXTENT_ALLOC_SYSTEM_INODE, and ORPHAN_DIR_SYSTEM_INODE.
1. ocfs2_mknod() acquires INODE_ALLOC then EXTENT_ALLOC.
2. ocfs2_dio_end_io_write() acquires EXTENT_ALLOC for unwritten
extents, then ORPHAN_DIR via ocfs2_del_inode_from_orphan() while still
holding EXTENT_ALLOC.
3. ocfs2_wipe_inode() acquires ORPHAN_DIR then INODE_ALLOC via
ocfs2_remove_inode.
Break the cycle in ocfs2_dio_end_io_write() by freeing the allocation
contexts (rele
In the Linux kernel, the following vulnerability has been resolved:
afs: Fix leak of ungot volume
Fix afs_lookup_volume_rcu() so that it doesn't leak a dying volume if
afs_try_get_volume() fails.
In the Linux kernel, the following vulnerability has been resolved:
afs: Fix vllist leak
Fix a leak of the new vllist in afs_update_cell() in the event that it is an
empty list (nr_servers == 0), in which case the old list isn't displaced
unless the old list is also empty.
ring-buffer: Fix event length with forced 8-byte alignment
In the Linux kernel, the following vulnerability has been resolved:
ring-buffer: Fix event length with forced 8-byte alignment
When RB_FORCE_8BYTE_ALIGNMENT is true, rb_calculate_event_length()
reserves the space of event->array[0] for placing the data length and
rb_update_event() stores the data length in event->array[0]
accordingly. As a result the whole event length will add extra 4 bytes
for sizeof(event.array[0]) unconditionally.
But ring_buffer_event_length() only subtracts the
sizeof(event->array[0]) for events larger than RB_MAX_SMALL_DATA +
sizeof(event->array[0]). As a result, small events on architectures
with RB_FORCE_8BYTE_ALI
ipvs: use parsed transport offset in TCP state lookup
In the Linux kernel, the following vulnerability has been resolved:
ipvs: use parsed transport offset in TCP state lookup
TCP state handling reparses the skb to find the TCP header. For IPv6 it
uses sizeof(struct ipv6hdr), while the surrounding IPVS code already
parsed the packet with ip_vs_fill_iph_skb() and has the real
transport-header offset in iph.len.
This makes TCP state handling look at the wrong bytes when an IPv6
packet carries extension headers. Use the parsed transport offset passed
down from ip_vs_set_state() when reading the TCP header.
For IPv4 and for IPv6 packets without extension headers, the passed
offset matches the pr
In the Linux kernel, the following vulnerability has been resolved:
arm64: dts: renesas: ironhide: Describe inline ECC carveouts
The DBSC5 DRAM controller protects DRAM content using inline ECC.
The inline ECC utilizes areas of DRAM for its operation, which are
in the DRAM address range, but must not be accessed or modified.
Describe the inline ECC carveout areas used by the DBSC5 controller
on this hardware as reserved-memory, which must not be accessed.
Include DRAM areas which are unprotected by ECC as well, those are
parts of the DRAM which directly precede the ECC carveout.
In case of high DRAM utilization, unless the inline ECC carve
KVM: arm64: nv: Write ESR_EL2 for injected nested SError exceptions
In the Linux kernel, the following vulnerability has been resolved:
KVM: arm64: nv: Write ESR_EL2 for injected nested SError exceptions
kvm_inject_el2_exception() writes ESR_EL2 for synchronous exceptions
but not for SError. enter_exception64() does not write ESR_ELx for any
exception type, so the constructed syndrome is dropped. A guest L2
hypervisor taking a nested SError observes stale ESR_EL2.
This affects both kvm_inject_nested_serror() and the EASE path in
kvm_inject_nested_sea().
Write ESR_EL2 for except_type_serror, matching except_type_sync.
ALSA: hda/tas2781: Cancel async firmware request at unbind
In the Linux kernel, the following vulnerability has been resolved:
ALSA: hda/tas2781: Cancel async firmware request at unbind
TAS2781 HDA I2C and SPI queue RCA firmware loading from component
bind with request_firmware_nowait(). The firmware loader keeps the
callback module pinned and holds a device reference, but the callback
still uses driver-private HDA state.
Component unbind removes controls and DSP state immediately. Later
device removal tears down the TAS2781 private data, including
codec_lock. If the async firmware callback runs after unbind has
started, it can operate on state that is being torn down.
Cancel or synchronize the a
In the Linux kernel, the following vulnerability has been resolved:
crypto: xilinx-trng - Remove crypto_rng interface
Implementing the crypto_rng interface has no purpose, as it isn't used
in practice. It's being removed from other drivers too. Just remove
it. This leaves hwrng, which is actually used.
Tagging with 'Cc stable' due to the bugs that this removes:
- xtrng_trng_generate() sometimes returned success even when it didn't
fill in all the bytes.
- It was possible for xtrng_trng_generate() and
xtrng_hwrng_trng_read() to run concurrently and interfere with each
other, as the locking code in xtrng_hwrng_trng_read(
drm/amdkfd: Validate CRIU-restored IDs before idr_alloc
In the Linux kernel, the following vulnerability has been resolved:
drm/amdkfd: Validate CRIU-restored IDs before idr_alloc
The KFD CRIU restore flow restores previously saved object IDs from
userspace.
For event restore:
kfd_criu_restore_event()
-> create_signal_event() / create_other_event()
-> allocate_event_notification_slot()
-> idr_alloc(..., *restore_id, *restore_id + 1, ...)
For BO restore:
criu_restore_memory_of_gpu()
-> idr_alloc(..., bo_priv->idr_handle, ...)
In both cases, the restored ID comes from userspace-provided CRIU data.
idr_alloc() expects the ID range values to fit within s
ntfs3: Allocate iomap inline_data using alloc_page
In the Linux kernel, the following vulnerability has been resolved:
ntfs3: Allocate iomap inline_data using alloc_page
This fixes a BUG reported in iomap_write_end_inline:
iomap_inline_data_valid checks that the inline_data fits within
a page. If the inline_data is allocated with kmemdup there's no
guarantee that it's page-aligned, so the check sometimes fails.
Allocate it with alloc_page to ensure it's page-aligned.
alpha/PCI: Add security_locked_down() check to pci_mmap_resource()
In the Linux kernel, the following vulnerability has been resolved:
alpha/PCI: Add security_locked_down() check to pci_mmap_resource()
Currently, Alpha's pci_mmap_resource() does not check
security_locked_down(LOCKDOWN_PCI_ACCESS) before allowing userspace to mmap
PCI BARs.
The generic version has had this check since commit eb627e17727e ("PCI:
Lock down BAR access when the kernel is locked down") to prevent DMA
attacks when the kernel is locked down.
Add the same check to Alpha's pci_mmap_resource().
In the Linux kernel, the following vulnerability has been resolved:
tipc: avoid busy looping in tipc_exit_net()
Blamed commit introduced a busy-wait loop in tipc_exit_net()
to wait for pending UDP bearer cleanup works to complete:
while (atomic_read(&tn->wq_count))
cond_resched();
This loop can busy-wait for a long time if cond_resched() is a NOP. This
typically happens if the netns exit is executed by a high priority task,
or under kernels configured without preemption (CONFIG_PREEMPT_NONE). In
such cases, it wastes CPU cycles and can lead to soft lockups.
Fix this by replacing the busy loop with wait_var_event(),
In the Linux kernel, the following vulnerability has been resolved:
bpf: Add missing access_ok call to copy_user_syms
As reported by sashiko we use __get_user without prior access_ok call on the
user space pointer. Adding the missing call for the whole pointer array.
Plus removing the err check in the error path, because it's not needed and
also we can return -ENOMEM directly from the first kvmalloc_array fail path.
[1] https://lore.kernel.org/bpf/[email protected]/
RDMA/rxe: Fix responder UAF on IB_QP_MAX_DEST_RD_ATOMIC modify_qp
In the Linux kernel, the following vulnerability has been resolved:
RDMA/rxe: Fix responder UAF on IB_QP_MAX_DEST_RD_ATOMIC modify_qp
rxe_qp_from_attr() handles IB_QP_MAX_DEST_RD_ATOMIC outside the
IB_QP_STATE path, so it holds no state_lock and runs while the responder
task rxe_receiver() (recv_task on rxe_wq) is live. A modify_qp() setting
only that attribute calls free_rd_atomic_resources() then
alloc_rd_atomic_resources(), swapping qp->resp.resources[] while
rxe_prepare_res()/find_resource() walk it; free_rd_atomic_resources()
also leaves the cached pointer qp->resp.res dangling. A local
unprivileged user can race the free/realloc into
Nicht bewertetEPSS 0,18%Keine Korrektur veröffentlicht
RDMA/rxe: Fix OOB in free_rd_atomic_resources()
In the Linux kernel, the following vulnerability has been resolved:
RDMA/rxe: Fix OOB in free_rd_atomic_resources()
free_rd_atomic_resources() iterates using qp->attr.max_dest_rd_atomic.
Updating max_dest_rd_atomic before freeing the old array can make the
free path walk past the old allocation and trigger a slab out-of-bounds
write catched by KASAN:
==================================================================
BUG: KASAN: slab-out-of-bounds in free_rd_atomic_resource drivers/infiniband/sw/rxe/rxe_qp.c:180 [inline]
BUG: KASAN: slab-out-of-bounds in free_rd_atomic_resources drivers/infiniband/sw/rxe/rxe_qp.c:171 [inline]
BUG: KASAN: sla
Nicht bewertetEPSS 0,16%Keine Korrektur veröffentlicht
nvme-tcp: fix usage of page_frag_cache
In the Linux kernel, the following vulnerability has been resolved:
nvme-tcp: fix usage of page_frag_cache
nvme uses page_frag_cache to preallocate PDU for each preallocated request
of block device. Block devices are created in parallel threads,
consequently page_frag_cache is used in not thread-safe manner.
That leads to incorrect refcounting of backstore pages and premature free.
That can be catched by !sendpage_ok inside network stack:
WARNING: CPU: 7 PID: 467 at ../net/core/skbuff.c:6931 skb_splice_from_iter+0xfa/0x310.
tcp_sendmsg_locked+0x782/0xce0
tcp_sendmsg+0x27/0x40
sock_sendmsg+0x8b/0xa0
nvme_tcp_try_send_cmd_pdu+0x149/0x2a
usb: xhci: bail out of setup if the controller is inaccessible
In the Linux kernel, the following vulnerability has been resolved:
usb: xhci: bail out of setup if the controller is inaccessible
xhci_gen_setup() locates the operational registers using the capability
length read from the very first register:
xhci->op_regs = hcd->regs +
HC_LENGTH(readl(&xhci->cap_regs->hc_capbase));
If the controller is dead or has dropped off the bus, that read returns
~0, HC_LENGTH() truncates it to 0xff, and op_regs ends up 0xff bytes
past the page-aligned MMIO base, i.e. unaligned. The first access
through it, xhci_halt() -> xhci_handshake() reading op_regs->status, is
then an unaligned readl() on device memory.
Nicht bewertetEPSS 0,16%Keine Korrektur veröffentlicht
fuse: fix race between interrupt and resend
In the Linux kernel, the following vulnerability has been resolved:
fuse: fix race between interrupt and resend
After commit f8fce75fedf7 ("fuse: clear intr_entry in fuse_resend and
fuse_remove_pending_req") the WARN_ON(!list_empty(&req->intr_entry)) in
fuse_request_free() still triggers due to the following race:
In request_wait_answer()
if (test_bit(FR_SENT, &req->flags)) -> returns true
In fuse_chan_resend()
clear_bit(FR_SENT, &req->flags)
In request_wait_answer()
queue_interrupt(req)
Fix by:
- move clearing FR_SENT inside fpq->lock
- move setting FR_PENDING inside fiq->lock
- recheck FR_SENT after acquiring fiq->lock in
Nicht bewertetEPSS 0,15%Keine Korrektur veröffentlicht
fuse: fix missing barrier when checking io-uring readiness
In the Linux kernel, the following vulnerability has been resolved:
fuse: fix missing barrier when checking io-uring readiness
fuse_block_alloc() reads fch->initialized and then fch->io_uring.
fch->io_uring is set before fch->initialized, ordered by the smp_wmb()
in fuse_chan_set_intialized(), but fuse_block_alloc() has no matching
read barrier between the two loads.
This may lead a CPU to observe fch->initialized=1 but fch->io_uring=0,
and skip the check that blocks request allocation until the io-uring
queues are ready. This can reintroduce the lock-order inversion deadlock
that commit 3393ff964e0f prevents.
Add an smp_rmb() barrier to