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Cristian Dumitrescu 7128c834d3 i40e: fix potential NULL pointer dereferencing
Currently, the function i40e_construct_skb_zc only frees the input xdp
buffer when the output skb is successfully built. On error, the
function i40e_clean_rx_irq_zc does not commit anything for the current
packet descriptor and simply exits the packet descriptor processing
loop, with the plan to restart the processing of this descriptor on
the next invocation. Therefore, on error the ring next-to-clean
pointer should not advance, the xdp i.e. *bi buffer should not be
freed and the current buffer info should not be invalidated by setting
*bi to NULL. Therefore, the *bi should only be set to NULL when the
function i40e_construct_skb_zc is successful, otherwise a NULL *bi
will be dereferenced when the work for the current descriptor is
eventually restarted.

Fixes: 3b4f0b66c2 ("i40e, xsk: Migrate to new MEM_TYPE_XSK_BUFF_POOL")
Signed-off-by: Cristian Dumitrescu <cristian.dumitrescu@intel.com>
Acked-by: Björn Töpel <bjorn.topel@intel.com>
Link: https://lore.kernel.org/r/20210111181138.49757-1-cristian.dumitrescu@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2021-01-13 19:33:28 -08:00
arch
block
certs
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Documentation dt-bindings: net: dwmac: fix queue priority documentation 2021-01-11 15:18:47 -08:00
drivers i40e: fix potential NULL pointer dereferencing 2021-01-13 19:33:28 -08:00
fs
include net: compound page support in skb_seq_read 2021-01-11 18:20:09 -08:00
init
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net can: isotp: isotp_getname(): fix kernel information leak 2021-01-13 22:15:13 +01:00
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tools Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf 2021-01-12 20:25:29 -08:00
usr
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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.