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Sylwester Dziedziuch 00eddb0e4e i40e: Fix queues reservation for XDP commit `92947844b8` upstream. When XDP was configured on a system with large number of CPUs and X722 NIC there was a call trace with NULL pointer dereference. i40e 0000:87:00.0: failed to get tracking for 256 queues for VSI 0 err -12 i40e 0000:87:00.0: setup of MAIN VSI failed BUG: kernel NULL pointer dereference, address: 0000000000000000 RIP: 0010:i40e_xdp+0xea/0x1b0 [i40e] Call Trace: ? i40e_reconfig_rss_queues+0x130/0x130 [i40e] dev_xdp_install+0x61/0xe0 dev_xdp_attach+0x18a/0x4c0 dev_change_xdp_fd+0x1e6/0x220 do_setlink+0x616/0x1030 ? ahci_port_stop+0x80/0x80 ? ata_qc_issue+0x107/0x1e0 ? lock_timer_base+0x61/0x80 ? __mod_timer+0x202/0x380 rtnl_setlink+0xe5/0x170 ? bpf_lsm_binder_transaction+0x10/0x10 ? security_capable+0x36/0x50 rtnetlink_rcv_msg+0x121/0x350 ? rtnl_calcit.isra.0+0x100/0x100 netlink_rcv_skb+0x50/0xf0 netlink_unicast+0x1d3/0x2a0 netlink_sendmsg+0x22a/0x440 sock_sendmsg+0x5e/0x60 __sys_sendto+0xf0/0x160 ? __sys_getsockname+0x7e/0xc0 ? _copy_from_user+0x3c/0x80 ? __sys_setsockopt+0xc8/0x1a0 __x64_sys_sendto+0x20/0x30 do_syscall_64+0x33/0x40 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f83fa7a39e0 This was caused by PF queue pile fragmentation due to flow director VSI queue being placed right after main VSI. Because of this main VSI was not able to resize its queue allocation for XDP resulting in no queues allocated for main VSI when XDP was turned on. Fix this by always allocating last queue in PF queue pile for a flow director VSI. Fixes: `41c445ff0f` ("i40e: main driver core") Fixes: `74608d17fe` ("i40e: add support for XDP_TX action") Signed-off-by: Sylwester Dziedziuch <sylwesterx.dziedziuch@intel.com> Signed-off-by: Mateusz Palczewski <mateusz.palczewski@intel.com> Reviewed-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com> Tested-by: Kiran Bhandare <kiranx.bhandare@intel.com> Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2022-02-01 17:27:06 +01:00
arch	powerpc/32: Fix boot failure with GCC latent entropy plugin	2022-02-01 17:27:06 +01:00
block	block: add bio_start_io_acct_time() to control start_time	2022-02-01 17:27:03 +01:00
certs	certs: Add support for using elliptic curve keys for signing modules	2021-08-23 19:55:42 +03:00
crypto	crypto: jitter - consider 32 LSB for APT	2022-01-27 11:04:31 +01:00
Documentation	psi: Fix uaf issue when psi trigger is destroyed while being polled	2022-02-01 17:27:01 +01:00
drivers	i40e: Fix queues reservation for XDP	2022-02-01 17:27:06 +01:00
fs	ocfs2: fix a deadlock when commit trans	2022-02-01 17:27:05 +01:00
include	mm, kasan: use compare-exchange operation to set KASAN page tag	2022-02-01 17:27:05 +01:00
init	init: make unknown command line param message clearer	2021-11-18 19:17:11 +01:00
ipc	shm: extend forced shm destroy to support objects from several IPC nses	2021-11-25 09:48:42 +01:00
kernel	sched/membarrier: Fix membarrier-rseq fence command missing from query bitmask	2022-02-01 17:27:05 +01:00
lib	lib/test_meminit: destroy cache in kmem_cache_alloc_bulk() test	2022-01-27 11:05:44 +01:00
LICENSES	LICENSES/dual/CC-BY-4.0: Git rid of "smart quotes"	2021-07-15 06:31:24 -06:00
mm	memcg: better bounds on the memcg stats updates	2022-01-29 10:58:24 +01:00
net	fsnotify: fix fsnotify hooks in pseudo filesystems	2022-02-01 17:27:01 +01:00
samples	samples: bpf: Fix 'unknown warning group' build warning on Clang	2022-01-27 11:03:29 +01:00
scripts	scripts: sphinx-pre-install: Fix ctex support on Debian	2022-01-27 11:05:44 +01:00
security	selinux: fix potential memleak in selinux_add_opt()	2022-01-27 11:03:43 +01:00
sound	ASoC: mediatek: mt8183: fix device_node leak	2022-01-27 11:05:04 +01:00
tools	mm/hmm.c: allow VM_MIXEDMAP to work with hmm_range_fault	2022-01-27 11:05:43 +01:00
usr	kbuild: remove include/linux/cyclades.h from header file check	2022-02-01 17:27:04 +01:00
virt	Revert "KVM: SVM: avoid infinite loop on NPF from bad address"	2022-02-01 17:27:01 +01:00
.clang-format	clang-format: Update with the latest for_each macro list	2021-05-12 23:32:39 +02:00
.cocciconfig
.get_maintainer.ignore	Opt out of scripts/get_maintainer.pl	2019-05-16 10:53:40 -07:00
.gitattributes	.gitattributes: use 'dts' diff driver for dts files	2019-12-04 19:44:11 -08:00
.gitignore	.gitignore: ignore only top-level modules.builtin	2021-05-02 00:43:35 +09:00
.mailmap	mailmap: add Andrej Shadura	2021-10-18 20:22:03 -10:00
COPYING	COPYING: state that all contributions really are covered by this file	2020-02-10 13:32:20 -08:00
CREDITS	MAINTAINERS: Move Daniel Drake to credits	2021-09-21 08:34:58 +03:00
Kbuild	kbuild: rename hostprogs-y/always to hostprogs/always-y	2020-02-04 01:53:07 +09:00
Kconfig	kbuild: ensure full rebuild when the compiler is updated	2020-05-12 13:28:33 +09:00
MAINTAINERS	drm fixes for 5.15 final	2021-10-28 12:17:01 -07:00
Makefile	Linux 5.15.18	2022-01-29 10:58:25 +01:00
README	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00

README

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.