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Chris Mi ccbe33003b net/mlx5e: TC, Don't offload post action rule if not supported 
If post action is not supported, eg. ignore_flow_level is not
supported, don't offload post action rule. Otherwise, will hit
panic [1].

Fix it by checking if post action table is valid or not.

[1]
[445537.863880] BUG: unable to handle page fault for address: ffffffffffffffb1
[445537.864617] #PF: supervisor read access in kernel mode
[445537.865244] #PF: error_code(0x0000) - not-present page
[445537.865860] PGD 70683a067 P4D 70683a067 PUD 70683c067 PMD 0
[445537.866497] Oops: 0000 [#1] PREEMPT SMP NOPTI
[445537.867077] CPU: 19 PID: 248742 Comm: tc Kdump: loaded Tainted: G           O       6.5.0+ #1
[445537.867888] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014
[445537.868834] RIP: 0010:mlx5e_tc_post_act_add+0x51/0x130 [mlx5_core]
[445537.869635] Code: c0 0d 00 00 e8 20 96 c6 d3 48 85 c0 0f 84 e5 00 00 00 c7 83 b0 01 00 00 00 00 00 00 49 89 c5 31 c0 31 d2 66 89 83 b4 01 00 00 <49> 8b 44 24 10 83 23 df 83 8b d8 01 00 00 04 48 89 83 c0 01 00 00
[445537.871318] RSP: 0018:ffffb98741cef428 EFLAGS: 00010246
[445537.871962] RAX: 0000000000000000 RBX: ffff8df341167000 RCX: 0000000000000001
[445537.872704] RDX: 0000000000000000 RSI: ffffffff954844e1 RDI: ffffffff9546e9cb
[445537.873430] RBP: ffffb98741cef448 R08: 0000000000000020 R09: 0000000000000246
[445537.874160] R10: 0000000000000000 R11: ffffffff943f73ff R12: ffffffffffffffa1
[445537.874893] R13: ffff8df36d336c20 R14: ffffffffffffffa1 R15: ffff8df341167000
[445537.875628] FS:  00007fcd6564f800(0000) GS:ffff8dfa9ea00000(0000) knlGS:0000000000000000
[445537.876425] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[445537.877090] CR2: ffffffffffffffb1 CR3: 00000003b5884001 CR4: 0000000000770ee0
[445537.877832] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[445537.878564] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[445537.879300] PKRU: 55555554
[445537.879797] Call Trace:
[445537.880263]  <TASK>
[445537.880713]  ? show_regs+0x6e/0x80
[445537.881232]  ? __die+0x29/0x70
[445537.881731]  ? page_fault_oops+0x85/0x160
[445537.882276]  ? search_exception_tables+0x65/0x70
[445537.882852]  ? kernelmode_fixup_or_oops+0xa2/0x120
[445537.883432]  ? __bad_area_nosemaphore+0x18b/0x250
[445537.884019]  ? bad_area_nosemaphore+0x16/0x20
[445537.884566]  ? do_kern_addr_fault+0x8b/0xa0
[445537.885105]  ? exc_page_fault+0xf5/0x1c0
[445537.885623]  ? asm_exc_page_fault+0x2b/0x30
[445537.886149]  ? __kmem_cache_alloc_node+0x1df/0x2a0
[445537.886717]  ? mlx5e_tc_post_act_add+0x51/0x130 [mlx5_core]
[445537.887431]  ? mlx5e_tc_post_act_add+0x30/0x130 [mlx5_core]
[445537.888172]  alloc_flow_post_acts+0xfb/0x1c0 [mlx5_core]
[445537.888849]  parse_tc_actions+0x582/0x5c0 [mlx5_core]
[445537.889505]  parse_tc_fdb_actions+0xd7/0x1f0 [mlx5_core]
[445537.890175]  __mlx5e_add_fdb_flow+0x1ab/0x2b0 [mlx5_core]
[445537.890843]  mlx5e_add_fdb_flow+0x56/0x120 [mlx5_core]
[445537.891491]  ? debug_smp_processor_id+0x1b/0x30
[445537.892037]  mlx5e_tc_add_flow+0x79/0x90 [mlx5_core]
[445537.892676]  mlx5e_configure_flower+0x305/0x450 [mlx5_core]
[445537.893341]  mlx5e_rep_setup_tc_cls_flower+0x3d/0x80 [mlx5_core]
[445537.894037]  mlx5e_rep_setup_tc_cb+0x5c/0xa0 [mlx5_core]
[445537.894693]  tc_setup_cb_add+0xdc/0x220
[445537.895177]  fl_hw_replace_filter+0x15f/0x220 [cls_flower]
[445537.895767]  fl_change+0xe87/0x1190 [cls_flower]
[445537.896302]  tc_new_tfilter+0x484/0xa50

Fixes: f0da4daa34 ("net/mlx5e: Refactor ct to use post action infrastructure")
Signed-off-by: Chris Mi <cmi@nvidia.com>
Reviewed-by: Jianbo Liu <jianbol@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Reviewed-by: Automatic Verification <verifier@nvidia.com>
Reviewed-by: Maher Sanalla <msanalla@nvidia.com>
Reviewed-by: Shay Drory <shayd@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Reviewed-by: Shachar Kagan <skagan@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
History 2023-12-04 22:11:53 -08:00
arch parisc architecture fixes for kernel v6.7-rc3: 2023-11-26 09:59:39 -08:00
block vfs-6.7-rc3.fixes 2023-11-24 09:45:40 -08:00
certs This update includes the following changes: 2023-11-02 16:15:30 -10:00
crypto This push fixes a regression in ahash and hides the Kconfig sub-options for the jitter RNG. 2023-11-09 17:04:58 -08:00
Documentation - Core Frameworks 2023-12-01 08:00:02 +09:00
drivers net/mlx5e: TC, Don't offload post action rule if not supported 2023-12-04 22:11:53 -08:00
fs Including fixes from bpf and wifi. 2023-12-01 08:24:46 +09:00
include net/mlx5e: Tidy up IPsec NAT-T SA discovery 2023-12-04 22:11:52 -08:00
init As usual, lots of singleton and doubleton patches all over the tree and 2023-11-02 20:53:31 -10:00
io_uring io_uring: fix off-by one bvec index 2023-11-20 15:21:38 -07:00
ipc Many singleton patches against the MM code. The patch series which are 2023-11-02 19:38:47 -10:00
kernel Including fixes from bpf and wifi. 2023-12-01 08:24:46 +09:00
lib parisc architecture fixes for kernel v6.7-rc3: 2023-11-26 09:59:39 -08:00
LICENSES LICENSES: Add the copyleft-next-0.3.1 license 2022-11-08 15:44:01 +01:00
mm vfs-6.7-rc3.fixes 2023-11-24 09:45:40 -08:00
net packet: Move reference count in packet_sock to atomic_long_t 2023-12-04 14:45:04 -08:00
rust Kbuild updates for v6.7 2023-11-04 08:07:19 -10:00
samples Landlock updates for v6.7-rc1 2023-11-03 09:28:53 -10:00
scripts scripts/checkstack.pl: match all stack sizes for s390 2023-11-22 15:06:23 +01:00
security + Features 2023-11-03 09:48:17 -10:00
sound sound fixes for 6.7-rc2 2023-11-17 09:05:31 -05:00
tools Including fixes from bpf and wifi. 2023-12-01 08:24:46 +09:00
usr arch: Remove Itanium (IA-64) architecture 2023-09-11 08:13:17 +00:00
virt ARM: 2023-09-07 13:52:20 -07:00
.clang-format iommu: Add for_each_group_device() 2023-05-23 08:15:51 +02:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore get_maintainer: add Alan to .get_maintainer.ignore 2022-08-20 15:17:44 -07:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore kbuild: rpm-pkg: generate kernel.spec in rpmbuild/SPECS/ 2023-10-03 20:49:09 +09:00
.mailmap As usual, lots of singleton and doubleton patches all over the tree and 2023-11-02 20:53:31 -10:00
.rustfmt.toml rust: add .rustfmt.toml 2022-09-28 09:02:20 +02:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS USB: Remove Wireless USB and UWB documentation 2023-08-09 14:17:32 +02:00
Kbuild Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS MAINTAINERS: exclude 9p from networking 2023-12-01 11:00:46 +00:00
Makefile Linux 6.7-rc3 2023-11-26 19:59:33 -08:00
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.