Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.
Taehee Yoo
authored
In the macsec_changelink(), "struct macsec_tx_sa tx_sc" is used to
store "macsec_secy.tx_sc".
But, the struct type of tx_sc is macsec_tx_sc, not macsec_tx_sa.
So, the macsec_tx_sc should be used instead.
Test commands:
ip link add dummy0 type dummy
ip link add macsec0 link dummy0 type macsec
ip link set macsec0 type macsec encrypt off
Splat looks like:
[61119.963483][ T9335] ==================================================================
[61119.964709][ T9335] BUG: KASAN: slab-out-of-bounds in macsec_changelink.part.34+0xb6/0x200 [macsec]
[61119.965787][ T9335] Read of size 160 at addr ffff888020d69c68 by task ip/9335
[61119.966699][ T9335]
[61119.966979][ T9335] CPU: 0 PID: 9335 Comm: ip Not tainted 5.6.0+ #503
[61119.967791][ T9335] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006
[61119.968914][ T9335] Call Trace:
[61119.969324][ T9335] dump_stack+0x96/0xdb
[61119.969809][ T9335] ? macsec_changelink.part.34+0xb6/0x200 [macsec]
[61119.970554][ T9335] print_address_description.constprop.5+0x1be/0x360
[61119.971294][ T9335] ? macsec_changelink.part.34+0xb6/0x200 [macsec]
[61119.971973][ T9335] ? macsec_changelink.part.34+0xb6/0x200 [macsec]
[61119.972703][ T9335] __kasan_report+0x12a/0x170
[61119.973323][ T9335] ? macsec_changelink.part.34+0xb6/0x200 [macsec]
[61119.973942][ T9335] kasan_report+0xe/0x20
[61119.974397][ T9335] check_memory_region+0x149/0x1a0
[61119.974866][ T9335] memcpy+0x1f/0x50
[61119.975209][ T9335] macsec_changelink.part.34+0xb6/0x200 [macsec]
[61119.975825][ T9335] ? macsec_get_stats64+0x3e0/0x3e0 [macsec]
[61119.976451][ T9335] ? kernel_text_address+0x111/0x120
[61119.976990][ T9335] ? pskb_expand_head+0x25f/0xe10
[61119.977503][ T9335] ? stack_trace_save+0x82/0xb0
[61119.977986][ T9335] ? memset+0x1f/0x40
[61119.978397][ T9335] ? __nla_validate_parse+0x98/0x1ab0
[61119.978936][ T9335] ? macsec_alloc_tfm+0x90/0x90 [macsec]
[61119.979511][ T9335] ? __kasan_slab_free+0x111/0x150
[61119.980021][ T9335] ? kfree+0xce/0x2f0
[61119.980700][ T9335] ? netlink_trim+0x196/0x1f0
[61119.981420][ T9335] ? nla_memcpy+0x90/0x90
[61119.982036][ T9335] ? register_lock_class+0x19e0/0x19e0
[61119.982776][ T9335] ? memcpy+0x34/0x50
[61119.983327][ T9335] __rtnl_newlink+0x922/0x1270
[ ... ]
Fixes: 3cf3227a ("net: macsec: hardware offloading infrastructure")
Signed-off-by: 
Taehee Yoo <ap420073@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>| Name | Last commit | Last update |
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