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CVSS v3.1 |
In the Linux kernel, the following vulnerability has been resolved:
powerpc/tm: Fix more userspace r13 corruption
Commit cf13435b730a ("powerpc/tm: Fix userspace r13 corruption") fixes a
problem in treclaim where a SLB miss can occur on the
thread_struct->ckpt_regs while SCRATCH0 is live with the saved user r13
value, clobbering it with the kernel r13 and ultimately resulting in
kernel r13 being stored in ckpt_regs.
There is an equivalent problem in trechkpt where the user r13 value is
loaded into r13 from chkpt_regs to be recheckpointed, but a SLB miss
could occur on ckpt_regs accesses after that, which will result in r13
being clobbered with a kernel value and that will get recheckpointed and
then restored to user registers.
The same memory page is accessed right before this critical window where
a SLB miss could cause corruption, so hitting the bug requires the SLB
entry be removed within a small window of instructions, which is
possible if a SLB related MCE hits there. PAPR also permits the
hypervisor to discard this SLB entry (because slb_shadow->persistent is
only set to SLB_NUM_BOLTED) although it's not known whether any
implementations would do this (KVM does not). So this is an extremely
unlikely bug, only found by inspection.
Fix this by also storing user r13 in a temporary location on the kernel
stack and don't change the r13 register from kernel r13 until the RI=0
critical section that does not fault.
The SCRATCH0 change is not strictly part of the fix, it's only used in
the RI=0 section so it does not have the same problem as the previous
SCRATCH0 bug. |
In the Linux kernel, the following vulnerability has been resolved:
media: imx-jpeg: fix a bug of accessing array out of bounds
When error occurs in parsing jpeg, the slot isn't acquired yet, it may
be the default value MXC_MAX_SLOTS.
If the driver access the slot using the incorrect slot number, it will
access array out of bounds.
The result is the driver will change num_domains, which follows
slot_data in struct mxc_jpeg_dev.
Then the driver won't detach the pm domain at rmmod, which will lead to
kernel panic when trying to insmod again. |
In the Linux kernel, the following vulnerability has been resolved:
ASoC: mediatek: Fix error handling in mt8183_da7219_max98357_dev_probe
The device_node pointer is returned by of_parse_phandle() with refcount
incremented. We should use of_node_put() on it when done.
This function only calls of_node_put() in the regular path.
And it will cause refcount leak in error paths.
Fix this by calling of_node_put() in error handling too. |
In the Linux kernel, the following vulnerability has been resolved:
scsi: qla2xxx: Fix crash during module load unload test
During purex packet handling the driver was incorrectly freeing a
pre-allocated structure. Fix this by skipping that entry.
System crashed with the following stack during a module unload test.
Call Trace:
sbitmap_init_node+0x7f/0x1e0
sbitmap_queue_init_node+0x24/0x150
blk_mq_init_bitmaps+0x3d/0xa0
blk_mq_init_tags+0x68/0x90
blk_mq_alloc_map_and_rqs+0x44/0x120
blk_mq_alloc_set_map_and_rqs+0x63/0x150
blk_mq_alloc_tag_set+0x11b/0x230
scsi_add_host_with_dma.cold+0x3f/0x245
qla2x00_probe_one+0xd5a/0x1b80 [qla2xxx]
Call Trace with slub_debug and debug kernel:
kasan_report_invalid_free+0x50/0x80
__kasan_slab_free+0x137/0x150
slab_free_freelist_hook+0xc6/0x190
kfree+0xe8/0x2e0
qla2x00_free_device+0x3bb/0x5d0 [qla2xxx]
qla2x00_remove_one+0x668/0xcf0 [qla2xxx] |
In the Linux kernel, the following vulnerability has been resolved:
scsi: qla2xxx: Implement ref count for SRB
The timeout handler and the done function are racing. When
qla2x00_async_iocb_timeout() starts to run it can be preempted by the
normal response path (via the firmware?). qla24xx_async_gpsc_sp_done()
releases the SRB unconditionally. When scheduling back to
qla2x00_async_iocb_timeout() qla24xx_async_abort_cmd() will access an freed
sp->qpair pointer:
qla2xxx [0000:83:00.0]-2871:0: Async-gpsc timeout - hdl=63d portid=234500 50:06:0e:80:08:77:b6:21.
qla2xxx [0000:83:00.0]-2853:0: Async done-gpsc res 0, WWPN 50:06:0e:80:08:77:b6:21
qla2xxx [0000:83:00.0]-2854:0: Async-gpsc OUT WWPN 20:45:00:27:f8:75:33:00 speeds=2c00 speed=0400.
qla2xxx [0000:83:00.0]-28d8:0: qla24xx_handle_gpsc_event 50:06:0e:80:08:77:b6:21 DS 7 LS 6 rc 0 login 1|1 rscn 1|0 lid 5
BUG: unable to handle kernel NULL pointer dereference at 0000000000000004
IP: qla24xx_async_abort_cmd+0x1b/0x1c0 [qla2xxx]
Obvious solution to this is to introduce a reference counter. One reference
is taken for the normal code path (the 'good' case) and one for the timeout
path. As we always race between the normal good case and the timeout/abort
handler we need to serialize it. Also we cannot assume any order between
the handlers. Since this is slow path we can use proper synchronization via
locks.
When we are able to cancel a timer (del_timer returns 1) we know there
can't be any error handling in progress because the timeout handler hasn't
expired yet, thus we can safely decrement the refcounter by one.
If we are not able to cancel the timer, we know an abort handler is
running. We have to make sure we call sp->done() in the abort handlers
before calling kref_put(). |
In the Linux kernel, the following vulnerability has been resolved:
scsi: qla2xxx: Fix warning message due to adisc being flushed
Fix warning message due to adisc being flushed. Linux kernel triggered a
warning message where a different error code type is not matching up with
the expected type. Add additional translation of one error code type to
another.
WARNING: CPU: 2 PID: 1131623 at drivers/scsi/qla2xxx/qla_init.c:498
qla2x00_async_adisc_sp_done+0x294/0x2b0 [qla2xxx]
CPU: 2 PID: 1131623 Comm: drmgr Not tainted 5.13.0-rc1-autotest #1
..
GPR28: c000000aaa9c8890 c0080000079ab678 c00000140a104800 c00000002bd19000
NIP [c00800000790857c] qla2x00_async_adisc_sp_done+0x294/0x2b0 [qla2xxx]
LR [c008000007908578] qla2x00_async_adisc_sp_done+0x290/0x2b0 [qla2xxx]
Call Trace:
[c00000001cdc3620] [c008000007908578] qla2x00_async_adisc_sp_done+0x290/0x2b0 [qla2xxx] (unreliable)
[c00000001cdc3710] [c0080000078f3080] __qla2x00_abort_all_cmds+0x1b8/0x580 [qla2xxx]
[c00000001cdc3840] [c0080000078f589c] qla2x00_abort_all_cmds+0x34/0xd0 [qla2xxx]
[c00000001cdc3880] [c0080000079153d8] qla2x00_abort_isp_cleanup+0x3f0/0x570 [qla2xxx]
[c00000001cdc3920] [c0080000078fb7e8] qla2x00_remove_one+0x3d0/0x480 [qla2xxx]
[c00000001cdc39b0] [c00000000071c274] pci_device_remove+0x64/0x120
[c00000001cdc39f0] [c0000000007fb818] device_release_driver_internal+0x168/0x2a0
[c00000001cdc3a30] [c00000000070e304] pci_stop_bus_device+0xb4/0x100
[c00000001cdc3a70] [c00000000070e4f0] pci_stop_and_remove_bus_device+0x20/0x40
[c00000001cdc3aa0] [c000000000073940] pci_hp_remove_devices+0x90/0x130
[c00000001cdc3b30] [c0080000070704d0] disable_slot+0x38/0x90 [rpaphp] [
c00000001cdc3b60] [c00000000073eb4c] power_write_file+0xcc/0x180
[c00000001cdc3be0] [c0000000007354bc] pci_slot_attr_store+0x3c/0x60
[c00000001cdc3c00] [c00000000055f820] sysfs_kf_write+0x60/0x80 [c00000001cdc3c20]
[c00000000055df10] kernfs_fop_write_iter+0x1a0/0x290
[c00000001cdc3c70] [c000000000447c4c] new_sync_write+0x14c/0x1d0
[c00000001cdc3d10] [c00000000044b134] vfs_write+0x224/0x330
[c00000001cdc3d60] [c00000000044b3f4] ksys_write+0x74/0x130
[c00000001cdc3db0] [c00000000002df70] system_call_exception+0x150/0x2d0
[c00000001cdc3e10] [c00000000000d45c] system_call_common+0xec/0x278 |
In the Linux kernel, the following vulnerability has been resolved:
KVM: SVM: fix panic on out-of-bounds guest IRQ
As guest_irq is coming from KVM_IRQFD API call, it may trigger
crash in svm_update_pi_irte() due to out-of-bounds:
crash> bt
PID: 22218 TASK: ffff951a6ad74980 CPU: 73 COMMAND: "vcpu8"
#0 [ffffb1ba6707fa40] machine_kexec at ffffffff8565b397
#1 [ffffb1ba6707fa90] __crash_kexec at ffffffff85788a6d
#2 [ffffb1ba6707fb58] crash_kexec at ffffffff8578995d
#3 [ffffb1ba6707fb70] oops_end at ffffffff85623c0d
#4 [ffffb1ba6707fb90] no_context at ffffffff856692c9
#5 [ffffb1ba6707fbf8] exc_page_fault at ffffffff85f95b51
#6 [ffffb1ba6707fc50] asm_exc_page_fault at ffffffff86000ace
[exception RIP: svm_update_pi_irte+227]
RIP: ffffffffc0761b53 RSP: ffffb1ba6707fd08 RFLAGS: 00010086
RAX: ffffb1ba6707fd78 RBX: ffffb1ba66d91000 RCX: 0000000000000001
RDX: 00003c803f63f1c0 RSI: 000000000000019a RDI: ffffb1ba66db2ab8
RBP: 000000000000019a R8: 0000000000000040 R9: ffff94ca41b82200
R10: ffffffffffffffcf R11: 0000000000000001 R12: 0000000000000001
R13: 0000000000000001 R14: ffffffffffffffcf R15: 000000000000005f
ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018
#7 [ffffb1ba6707fdb8] kvm_irq_routing_update at ffffffffc09f19a1 [kvm]
#8 [ffffb1ba6707fde0] kvm_set_irq_routing at ffffffffc09f2133 [kvm]
#9 [ffffb1ba6707fe18] kvm_vm_ioctl at ffffffffc09ef544 [kvm]
RIP: 00007f143c36488b RSP: 00007f143a4e04b8 RFLAGS: 00000246
RAX: ffffffffffffffda RBX: 00007f05780041d0 RCX: 00007f143c36488b
RDX: 00007f05780041d0 RSI: 000000004008ae6a RDI: 0000000000000020
RBP: 00000000000004e8 R8: 0000000000000008 R9: 00007f05780041e0
R10: 00007f0578004560 R11: 0000000000000246 R12: 00000000000004e0
R13: 000000000000001a R14: 00007f1424001c60 R15: 00007f0578003bc0
ORIG_RAX: 0000000000000010 CS: 0033 SS: 002b
Vmx have been fix this in commit 3a8b0677fc61 (KVM: VMX: Do not BUG() on
out-of-bounds guest IRQ), so we can just copy source from that to fix
this. |
In the Linux kernel, the following vulnerability has been resolved:
rxrpc: Fix call timer start racing with call destruction
The rxrpc_call struct has a timer used to handle various timed events
relating to a call. This timer can get started from the packet input
routines that are run in softirq mode with just the RCU read lock held.
Unfortunately, because only the RCU read lock is held - and neither ref or
other lock is taken - the call can start getting destroyed at the same time
a packet comes in addressed to that call. This causes the timer - which
was already stopped - to get restarted. Later, the timer dispatch code may
then oops if the timer got deallocated first.
Fix this by trying to take a ref on the rxrpc_call struct and, if
successful, passing that ref along to the timer. If the timer was already
running, the ref is discarded.
The timer completion routine can then pass the ref along to the call's work
item when it queues it. If the timer or work item where already
queued/running, the extra ref is discarded. |
In the Linux kernel, the following vulnerability has been resolved:
ACPI: CPPC: Avoid out of bounds access when parsing _CPC data
If the NumEntries field in the _CPC return package is less than 2, do
not attempt to access the "Revision" element of that package, because
it may not be present then.
BugLink: https://lore.kernel.org/lkml/20220322143534.GC32582@xsang-OptiPlex-9020/ |
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: btmtksdio: Fix kernel oops in btmtksdio_interrupt
Fix the following kernel oops in btmtksdio_interrrupt
[ 14.339134] btmtksdio_interrupt+0x28/0x54
[ 14.339139] process_sdio_pending_irqs+0x68/0x1a0
[ 14.339144] sdio_irq_work+0x40/0x70
[ 14.339154] process_one_work+0x184/0x39c
[ 14.339160] worker_thread+0x228/0x3e8
[ 14.339168] kthread+0x148/0x3ac
[ 14.339176] ret_from_fork+0x10/0x30
That happened because hdev->power_on is already called before
sdio_set_drvdata which btmtksdio_interrupt handler relies on is not
properly set up.
The details are shown as the below: hci_register_dev would run
queue_work(hdev->req_workqueue, &hdev->power_on) as WQ_HIGHPRI
workqueue_struct to complete the power-on sequeunce and thus hci_power_on
may run before sdio_set_drvdata is done in btmtksdio_probe.
The hci_dev_do_open in hci_power_on would initialize the device and enable
the interrupt and thus it is possible that btmtksdio_interrupt is being
called right before sdio_set_drvdata is filled out.
When btmtksdio_interrupt is being called and sdio_set_drvdata is not filled
, the kernel oops is going to happen because btmtksdio_interrupt access an
uninitialized pointer. |
In the Linux kernel, the following vulnerability has been resolved:
mptcp: Fix crash due to tcp_tsorted_anchor was initialized before release skb
Got crash when doing pressure test of mptcp:
===========================================================================
dst_release: dst:ffffa06ce6e5c058 refcnt:-1
kernel tried to execute NX-protected page - exploit attempt? (uid: 0)
BUG: unable to handle kernel paging request at ffffa06ce6e5c058
PGD 190a01067 P4D 190a01067 PUD 43fffb067 PMD 22e403063 PTE 8000000226e5c063
Oops: 0011 [#1] SMP PTI
CPU: 7 PID: 7823 Comm: kworker/7:0 Kdump: loaded Tainted: G E
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.2.1 04/01/2014
Call Trace:
? skb_release_head_state+0x68/0x100
? skb_release_all+0xe/0x30
? kfree_skb+0x32/0xa0
? mptcp_sendmsg_frag+0x57e/0x750
? __mptcp_retrans+0x21b/0x3c0
? __switch_to_asm+0x35/0x70
? mptcp_worker+0x25e/0x320
? process_one_work+0x1a7/0x360
? worker_thread+0x30/0x390
? create_worker+0x1a0/0x1a0
? kthread+0x112/0x130
? kthread_flush_work_fn+0x10/0x10
? ret_from_fork+0x35/0x40
===========================================================================
In __mptcp_alloc_tx_skb skb was allocated and skb->tcp_tsorted_anchor will
be initialized, in under memory pressure situation sk_wmem_schedule will
return false and then kfree_skb. In this case skb->_skb_refdst is not null
because_skb_refdst and tcp_tsorted_anchor are stored in the same mem, and
kfree_skb will try to release dst and cause crash. |
In the Linux kernel, the following vulnerability has been resolved:
af_netlink: Fix shift out of bounds in group mask calculation
When a netlink message is received, netlink_recvmsg() fills in the address
of the sender. One of the fields is the 32-bit bitfield nl_groups, which
carries the multicast group on which the message was received. The least
significant bit corresponds to group 1, and therefore the highest group
that the field can represent is 32. Above that, the UB sanitizer flags the
out-of-bounds shift attempts.
Which bits end up being set in such case is implementation defined, but
it's either going to be a wrong non-zero value, or zero, which is at least
not misleading. Make the latter choice deterministic by always setting to 0
for higher-numbered multicast groups.
To get information about membership in groups >= 32, userspace is expected
to use nl_pktinfo control messages[0], which are enabled by NETLINK_PKTINFO
socket option.
[0] https://lwn.net/Articles/147608/
The way to trigger this issue is e.g. through monitoring the BRVLAN group:
# bridge monitor vlan &
# ip link add name br type bridge
Which produces the following citation:
UBSAN: shift-out-of-bounds in net/netlink/af_netlink.c:162:19
shift exponent 32 is too large for 32-bit type 'int' |
In the Linux kernel, the following vulnerability has been resolved:
net: dsa: fix panic on shutdown if multi-chip tree failed to probe
DSA probing is atypical because a tree of devices must probe all at
once, so out of N switches which call dsa_tree_setup_routing_table()
during probe, for (N - 1) of them, "complete" will return false and they
will exit probing early. The Nth switch will set up the whole tree on
their behalf.
The implication is that for (N - 1) switches, the driver binds to the
device successfully, without doing anything. When the driver is bound,
the ->shutdown() method may run. But if the Nth switch has failed to
initialize the tree, there is nothing to do for the (N - 1) driver
instances, since the slave devices have not been created, etc. Moreover,
dsa_switch_shutdown() expects that the calling @ds has been in fact
initialized, so it jumps at dereferencing the various data structures,
which is incorrect.
Avoid the ensuing NULL pointer dereferences by simply checking whether
the Nth switch has previously set "ds->setup = true" for the switch
which is currently shutting down. The entire setup is serialized under
dsa2_mutex which we already hold. |
In the Linux kernel, the following vulnerability has been resolved:
mxser: fix xmit_buf leak in activate when LSR == 0xff
When LSR is 0xff in ->activate() (rather unlike), we return an error.
Provided ->shutdown() is not called when ->activate() fails, nothing
actually frees the buffer in this case.
Fix this by properly freeing the buffer in a designated label. We jump
there also from the "!info->type" if now too. |
In the Linux kernel, the following vulnerability has been resolved:
remoteproc: qcom_q6v5_mss: Fix some leaks in q6v5_alloc_memory_region
The device_node pointer is returned by of_parse_phandle() or
of_get_child_by_name() with refcount incremented.
We should use of_node_put() on it when done.
This function only call of_node_put(node) when of_address_to_resource
succeeds, missing error cases. |
In the Linux kernel, the following vulnerability has been resolved:
memstick/mspro_block: fix handling of read-only devices
Use set_disk_ro to propagate the read-only state to the block layer
instead of checking for it in ->open and leaking a reference in case
of a read-only device. |
In the Linux kernel, the following vulnerability has been resolved:
parisc: Fix non-access data TLB cache flush faults
When a page is not present, we get non-access data TLB faults from
the fdc and fic instructions in flush_user_dcache_range_asm and
flush_user_icache_range_asm. When these occur, the cache line is
not invalidated and potentially we get memory corruption. The
problem was hidden by the nullification of the flush instructions.
These faults also affect performance. With pa8800/pa8900 processors,
there will be 32 faults per 4 KB page since the cache line is 128
bytes. There will be more faults with earlier processors.
The problem is fixed by using flush_cache_pages(). It does the flush
using a tmp alias mapping.
The flush_cache_pages() call in flush_cache_range() flushed too
large a range.
V2: Remove unnecessary preempt_disable() and preempt_enable() calls. |
In the Linux kernel, the following vulnerability has been resolved:
ext4: don't BUG if someone dirty pages without asking ext4 first
[un]pin_user_pages_remote is dirtying pages without properly warning
the file system in advance. A related race was noted by Jan Kara in
2018[1]; however, more recently instead of it being a very hard-to-hit
race, it could be reliably triggered by process_vm_writev(2) which was
discovered by Syzbot[2].
This is technically a bug in mm/gup.c, but arguably ext4 is fragile in
that if some other kernel subsystem dirty pages without properly
notifying the file system using page_mkwrite(), ext4 will BUG, while
other file systems will not BUG (although data will still be lost).
So instead of crashing with a BUG, issue a warning (since there may be
potential data loss) and just mark the page as clean to avoid
unprivileged denial of service attacks until the problem can be
properly fixed. More discussion and background can be found in the
thread starting at [2].
[1] https://lore.kernel.org/linux-mm/20180103100430.GE4911@quack2.suse.cz
[2] https://lore.kernel.org/r/Yg0m6IjcNmfaSokM@google.com |
In the Linux kernel, the following vulnerability has been resolved:
f2fs: fix to do sanity check on curseg->alloc_type
As Wenqing Liu reported in bugzilla:
https://bugzilla.kernel.org/show_bug.cgi?id=215657
- Overview
UBSAN: array-index-out-of-bounds in fs/f2fs/segment.c:3460:2 when mount and operate a corrupted image
- Reproduce
tested on kernel 5.17-rc4, 5.17-rc6
1. mkdir test_crash
2. cd test_crash
3. unzip tmp2.zip
4. mkdir mnt
5. ./single_test.sh f2fs 2
- Kernel dump
[ 46.434454] loop0: detected capacity change from 0 to 131072
[ 46.529839] F2FS-fs (loop0): Mounted with checkpoint version = 7548c2d9
[ 46.738319] ================================================================================
[ 46.738412] UBSAN: array-index-out-of-bounds in fs/f2fs/segment.c:3460:2
[ 46.738475] index 231 is out of range for type 'unsigned int [2]'
[ 46.738539] CPU: 2 PID: 939 Comm: umount Not tainted 5.17.0-rc6 #1
[ 46.738547] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.13.0-1ubuntu1.1 04/01/2014
[ 46.738551] Call Trace:
[ 46.738556] <TASK>
[ 46.738563] dump_stack_lvl+0x47/0x5c
[ 46.738581] ubsan_epilogue+0x5/0x50
[ 46.738592] __ubsan_handle_out_of_bounds+0x68/0x80
[ 46.738604] f2fs_allocate_data_block+0xdff/0xe60 [f2fs]
[ 46.738819] do_write_page+0xef/0x210 [f2fs]
[ 46.738934] f2fs_do_write_node_page+0x3f/0x80 [f2fs]
[ 46.739038] __write_node_page+0x2b7/0x920 [f2fs]
[ 46.739162] f2fs_sync_node_pages+0x943/0xb00 [f2fs]
[ 46.739293] f2fs_write_checkpoint+0x7bb/0x1030 [f2fs]
[ 46.739405] kill_f2fs_super+0x125/0x150 [f2fs]
[ 46.739507] deactivate_locked_super+0x60/0xc0
[ 46.739517] deactivate_super+0x70/0xb0
[ 46.739524] cleanup_mnt+0x11a/0x200
[ 46.739532] __cleanup_mnt+0x16/0x20
[ 46.739538] task_work_run+0x67/0xa0
[ 46.739547] exit_to_user_mode_prepare+0x18c/0x1a0
[ 46.739559] syscall_exit_to_user_mode+0x26/0x40
[ 46.739568] do_syscall_64+0x46/0xb0
[ 46.739584] entry_SYSCALL_64_after_hwframe+0x44/0xae
The root cause is we missed to do sanity check on curseg->alloc_type,
result in out-of-bound accessing on sbi->block_count[] array, fix it. |
In the Linux kernel, the following vulnerability has been resolved:
net: mana: Fix Rx DMA datasize and skb_over_panic
mana_get_rxbuf_cfg() aligns the RX buffer's DMA datasize to be
multiple of 64. So a packet slightly bigger than mtu+14, say 1536,
can be received and cause skb_over_panic.
Sample dmesg:
[ 5325.237162] skbuff: skb_over_panic: text:ffffffffc043277a len:1536 put:1536 head:ff1100018b517000 data:ff1100018b517100 tail:0x700 end:0x6ea dev:<NULL>
[ 5325.243689] ------------[ cut here ]------------
[ 5325.245748] kernel BUG at net/core/skbuff.c:192!
[ 5325.247838] invalid opcode: 0000 [#1] PREEMPT SMP NOPTI
[ 5325.258374] RIP: 0010:skb_panic+0x4f/0x60
[ 5325.302941] Call Trace:
[ 5325.304389] <IRQ>
[ 5325.315794] ? skb_panic+0x4f/0x60
[ 5325.317457] ? asm_exc_invalid_op+0x1f/0x30
[ 5325.319490] ? skb_panic+0x4f/0x60
[ 5325.321161] skb_put+0x4e/0x50
[ 5325.322670] mana_poll+0x6fa/0xb50 [mana]
[ 5325.324578] __napi_poll+0x33/0x1e0
[ 5325.326328] net_rx_action+0x12e/0x280
As discussed internally, this alignment is not necessary. To fix
this bug, remove it from the code. So oversized packets will be
marked as CQE_RX_TRUNCATED by NIC, and dropped. |