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  1. 18 Jun, 2023 2 commits
  3. 17 Jun, 2023 1 commit
    • Íñigo Huguet's avatar
      sfc: use budget for TX completions · 4aaf2c52
      Íñigo Huguet authored 
      When running workloads heavy unbalanced towards TX (high TX, low RX
traffic), sfc driver can retain the CPU during too long times. Although
in many cases this is not enough to be visible, it can affect
performance and system responsiveness.

A way to reproduce it is to use a debug kernel and run some parallel
netperf TX tests. In some systems, this will lead to this message being
logged:
  kernel:watchdog: BUG: soft lockup - CPU#12 stuck for 22s!

The reason is that sfc driver doesn't account any NAPI budget for the TX
completion events work. With high-TX/low-RX traffic, this makes that the
CPU is held for long time for NAPI poll.

Documentations says "drivers can process completions for any number of Tx
packets but should only process up to budget number of Rx packets".
However, many drivers do limit the amount of TX completions that they
process in a single NAPI poll.

In the same way, this patch adds a limit for the TX work in sfc. With
the patch applied, the watchdog warning never appears.

Tested with netperf in different combinations: single process / parallel
processes, TCP / UDP and different sizes of UDP messages. Repeated the
tests before and after the patch, without any noticeable difference in
network or CPU performance.

Test hardware:
Intel(R) Xeon(R) CPU E5-1620 v4 @ 3.50GHz (4 cores, 2 threads/core)
Solarflare Communications XtremeScale X2522-25G Network Adapter

Fixes: 5227eccc ("sfc: remove tx and MCDI handling from NAPI budget consideration")
Fixes: d19a5372 ("sfc_ef100: TX path for EF100 NICs")
Reported-by: default avatarFei Liu <feliu@redhat.com>
Signed-off-by: default avatarÍñigo Huguet <ihuguet@redhat.com>
Acked-by: default avatarMartin Habets <habetsm.xilinx@gmail.com>
Link: https://lore.kernel.org/r/20230615084929.10506-1-ihuguet@redhat.comSigned-off-by: default avatarJakub Kicinski <kuba@kernel.org>
      4aaf2c52
  5. 16 Jun, 2023 13 commits
    • Jakub Kicinski's avatar
      Merge branch 'check-if-fips-mode-is-enabled-when-running-selftests' · d4e06728
      Jakub Kicinski authored 
      Magali Lemes says:

====================
Check if FIPS mode is enabled when running selftests

Some test cases from net/tls, net/fcnal-test and net/vrf-xfrm-tests
that rely on cryptographic functions to work and use non-compliant FIPS
algorithms fail in FIPS mode.

In order to allow these tests to pass in a wider set of kernels,
 - for net/tls, skip the test variants that use the ChaCha20-Poly1305
and SM4 algorithms, when FIPS mode is enabled;
 - for net/fcnal-test, skip the MD5 tests, when FIPS mode is enabled;
 - for net/vrf-xfrm-tests, replace the algorithms that are not
FIPS-compliant with compliant ones.

v1: https://lore.kernel.org/netdev/20230607174302.19542-1-magali.lemes@canonical.com/
v2: https://lore.kernel.org/netdev/20230609164324.497813-1-magali.lemes@canonical.com/
v3: https://lore.kernel.org/netdev/20230612125107.73795-1-magali.lemes@canonical.com/
====================

Link: https://lore.kernel.org/r/20230613123222.631897-1-magali.lemes@canonical.comSigned-off-by: default avatarJakub Kicinski <kuba@kernel.org>
      d4e06728
    • Magali Lemes's avatar
      selftests: net: fcnal-test: check if FIPS mode is enabled · d7a2fc14
      Magali Lemes authored 
      There are some MD5 tests which fail when the kernel is in FIPS mode,
since MD5 is not FIPS compliant. Add a check and only run those tests
if FIPS mode is not enabled.

Fixes: f0bee1eb ("fcnal-test: Add TCP MD5 tests")
Fixes: 5cad8bce ("fcnal-test: Add TCP MD5 tests for VRF")
Reviewed-by: default avatarDavid Ahern <dsahern@kernel.org>
Signed-off-by: default avatarMagali Lemes <magali.lemes@canonical.com>
Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
      d7a2fc14
    • Magali Lemes's avatar
      selftests: net: vrf-xfrm-tests: change authentication and encryption algos · cb43c60e
      Magali Lemes authored 
      The vrf-xfrm-tests tests use the hmac(md5) and cbc(des3_ede)
algorithms for performing authentication and encryption, respectively.
This causes the tests to fail when fips=1 is set, since these algorithms
are not allowed in FIPS mode. Therefore, switch from hmac(md5) and
cbc(des3_ede) to hmac(sha1) and cbc(aes), which are FIPS compliant.

Fixes: 3f251d74 ("selftests: Add tests for vrf and xfrms")
Reviewed-by: default avatarDavid Ahern <dsahern@kernel.org>
Signed-off-by: default avatarMagali Lemes <magali.lemes@canonical.com>
Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
      cb43c60e
    • Magali Lemes's avatar
      selftests: net: tls: check if FIPS mode is enabled · d113c395
      Magali Lemes authored 
      TLS selftests use the ChaCha20-Poly1305 and SM4 algorithms, which are not
FIPS compliant. When fips=1, this set of tests fails. Add a check and only
run these tests if not in FIPS mode.

Fixes: 4f336e88 ("selftests/tls: add CHACHA20-POLY1305 to tls selftests")
Fixes: e506342a ("selftests/tls: add SM4 GCM/CCM to tls selftests")
Reviewed-by: default avatarJakub Kicinski <kuba@kernel.org>
Signed-off-by: default avatarMagali Lemes <magali.lemes@canonical.com>
Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
      d113c395
    • Magali Lemes's avatar
      selftests/harness: allow tests to be skipped during setup · 372b304c
      Magali Lemes authored 
      Before executing each test from a fixture, FIXTURE_SETUP is run once.
When SKIP is used in FIXTURE_SETUP, the setup function returns early
but the test still proceeds to run, unless another SKIP macro is used
within the test definition, leading to some code repetition. Therefore,
allow tests to be skipped directly from the setup function.
Suggested-by: default avatarJakub Kicinski <kuba@kernel.org>
Signed-off-by: default avatarMagali Lemes <magali.lemes@canonical.com>
Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
      372b304c
    • Linus Torvalds's avatar
      Merge tag 'net-6.4-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net · 40f71e7c
      Linus Torvalds authored 
      Pull networking fixes from Jakub Kicinski:
 "Including fixes from wireless, and netfilter.

  Selftests excluded - we have 58 patches and diff of +442/-199, which
  isn't really small but perhaps with the exception of the WiFi locking
  change it's old(ish) bugs.

  We have no known problems with v6.4.

  The selftest changes are rather large as MPTCP folks try to apply
  Greg's guidance that selftest from torvalds/linux should be able to
  run against stable kernels.

  Last thing I should call out is the DCCP/UDP-lite deprecation notices.
  We are fairly sure those are dead, but if we're wrong reverting them
  back in won't be fun.

  Current release - regressions:

   - wifi:
      - cfg80211: fix double lock bug in reg_wdev_chan_valid()
      - iwlwifi: mvm: spin_lock_bh() to fix lockdep regression

  Current release - new code bugs:

   - handshake: remove fput() that causes use-after-free

  Previous releases - regressions:

   - sched: cls_u32: fix reference counter leak leading to overflow

   - sched: cls_api: fix lockup on flushing explicitly created chain

  Previous releases - always broken:

   - nf_tables: integrate pipapo into commit protocol

   - nf_tables: incorrect error path handling with NFT_MSG_NEWRULE, fix
     dangling pointer on failure

   - ping6: fix send to link-local addresses with VRF

   - sched: act_pedit: parse L3 header for L4 offset, the skb may not
     have the offset saved

   - sched: act_ct: fix promotion of offloaded unreplied tuple

   - sched: refuse to destroy an ingress and clsact Qdiscs if there are
     lockless change operations in flight

   - wifi: mac80211: fix handful of bugs in multi-link operation

   - ipvlan: fix bound dev checking for IPv6 l3s mode

   - eth: enetc: correct the indexes of highest and 2nd highest TCs

   - eth: ice: fix XDP memory leak when NIC is brought up and down

  Misc:

   - add deprecation notices for UDP-lite and DCCP

   - selftests: mptcp: skip tests not supported by old kernels

   - sctp: handle invalid error codes without calling BUG()"

* tag 'net-6.4-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (91 commits)
  dccp: Print deprecation notice.
  udplite: Print deprecation notice.
  octeon_ep: Add missing check for ioremap
  selftests/ptp: Fix timestamp printf format for PTP_SYS_OFFSET
  net: ethernet: stmicro: stmmac: fix possible memory leak in __stmmac_open
  net: tipc: resize nlattr array to correct size
  sfc: fix XDP queues mode with legacy IRQ
  net: macsec: fix double free of percpu stats
  net: lapbether: only support ethernet devices
  MAINTAINERS: add reviewers for SMC Sockets
  s390/ism: Fix trying to free already-freed IRQ by repeated ism_dev_exit()
  net: dsa: felix: fix taprio guard band overflow at 10Mbps with jumbo frames
  net/sched: cls_api: Fix lockup on flushing explicitly created chain
  ice: Fix ice module unload
  net/handshake: remove fput() that causes use-after-free
  selftests: forwarding: hw_stats_l3: Set addrgenmode in a separate step
  net/sched: qdisc_destroy() old ingress and clsact Qdiscs before grafting
  net/sched: Refactor qdisc_graft() for ingress and clsact Qdiscs
  net/sched: act_ct: Fix promotion of offloaded unreplied tuple
  wifi: iwlwifi: mvm: spin_lock_bh() to fix lockdep regression
  ...
      40f71e7c
    • Linus Torvalds's avatar
      Merge tag 'loongarch-fixes-6.4-1' of... · 627d8586
      Linus Torvalds authored 
      Merge tag 'loongarch-fixes-6.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson

Pull LoongArch fixes from Huacai Chen:
 "Some trivial bug fixes for v6.4-rc7"

* tag 'loongarch-fixes-6.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson:
  LoongArch: Fix debugfs_create_dir() error checking
  LoongArch: Avoid uninitialized alignment_mask
  LoongArch: Fix perf event id calculation
  LoongArch: Fix the write_fcsr() macro
  LoongArch: Let pmd_present() return true when splitting pmd
      627d8586
    • Linus Torvalds's avatar
      Merge tag 'for-6.4/dm-fixes' of... · 0e306952
      Linus Torvalds authored 
      Merge tag 'for-6.4/dm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm

Pull device mapper fixes from Mike Snitzer:

 - Fix DM thinp discard performance regression introduced during this
   merge window where DM core was splitting large discards every 128K
   (max_sectors_kb) rather than every 64M (discard_max_bytes).

 - Extend DM core LOCKFS fix, made during 6.4 merge, to also fix race
   between do_mount and dm's do_suspend (in addition to the earlier
   fix's do_mount race with dm's do_resume).

 - Fix DM thin metadata operations to first check if the thin-pool is in
   "fail_io" mode; otherwise UAF can occur.

 - Fix DM thinp's call to __blkdev_issue_discard to use GFP_NOIO rather
   than GFP_NOWAIT (__blkdev_issue_discard cannot handle NULL return
   from bio_alloc).

* tag 'for-6.4/dm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
  dm: use op specific max_sectors when splitting abnormal io
  dm thin: fix issue_discard to pass GFP_NOIO to __blkdev_issue_discard
  dm thin metadata: check fail_io before using data_sm
  dm: don't lock fs when the map is NULL during suspend or resume
      0e306952
    • Linus Torvalds's avatar
      Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma · 93fd8eb0
      Linus Torvalds authored 
      Pull rdma fixes from Jason Gunthorpe:
 "This is an unusually large bunch of bug fixes for the later rc cycle,
  rxe and mlx5 both dumped a lot of things at once. rxe continues to fix
  itself, and mlx5 is fixing a bunch of "queue counters" related bugs.

  There is one highly notable bug fix regarding the qkey. This small
  security check was missed in the original 2005 implementation and it
  allows some significant issues.

  Summary:

   - Two rtrs bug fixes for error unwind bugs

   - Several rxe bug fixes:
      * Incorrect Rx packet validation
      * Using memory without a refcount
      * Syzkaller found use before initialization
      * Regression fix for missing locking with the tasklet conversion
        from this merge window

   - Have bnxt report the correct link properties to userspace, this was
     a regression in v6.3

   - Several mlx5 bug fixes:
      * Kernel crash triggerable by userspace for the RAW ethernet
        profile
      * Defend against steering refcounting issues created by userspace
      * Incorrect change of QP port affinity parameters in some LAG
        configurations

   - Fix mlx5 Q counters:
      * Do not over allocate Q counters to allow userspace to use the
        full port capacity
      * Kernel crash triggered by eswitch due to mis-use of Q counters
      * Incorrect mlx5_device for Q counters in some LAG configurations

   - Properly implement the IBA spec restricting privileged qkeys to
     root

   - Always an error when reading from a disassociated device's event
     queue

   - isert bug fixes:
      * Avoid a deadlock with the CM handler and CM ID destruction
      * Correct list corruption due to incorrect locking
      * Fix a use after free around connection tear down"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma:
  RDMA/rxe: Fix rxe_cq_post
  IB/isert: Fix incorrect release of isert connection
  IB/isert: Fix possible list corruption in CMA handler
  IB/isert: Fix dead lock in ib_isert
  RDMA/mlx5: Fix affinity assignment
  IB/uverbs: Fix to consider event queue closing also upon non-blocking mode
  RDMA/uverbs: Restrict usage of privileged QKEYs
  RDMA/cma: Always set static rate to 0 for RoCE
  RDMA/mlx5: Fix Q-counters query in LAG mode
  RDMA/mlx5: Remove vport Q-counters dependency on normal Q-counters
  RDMA/mlx5: Fix Q-counters per vport allocation
  RDMA/mlx5: Create an indirect flow table for steering anchor
  RDMA/mlx5: Initiate dropless RQ for RAW Ethernet functions
  RDMA/rxe: Fix the use-before-initialization error of resp_pkts
  RDMA/bnxt_re: Fix reporting active_{speed,width} attributes
  RDMA/rxe: Fix ref count error in check_rkey()
  RDMA/rxe: Fix packet length checks
  RDMA/rtrs: Fix rxe_dealloc_pd warning
  RDMA/rtrs: Fix the last iu->buf leak in err path
      93fd8eb0
    • Linus Torvalds's avatar
      Merge tag 'spi-fix-v6.4-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi · b7feaa49
      Linus Torvalds authored 
      Pull spi fixes from Mark Brown:
 "A few more driver specific fixes.

  The DesignWare fix is for an issue introduced by conversion to the
  chip select accessor functions and is pretty important but the other
  two are less severe"

* tag 'spi-fix-v6.4-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
  spi: dw: Replace incorrect spi_get_chipselect with set
  spi: fsl-dspi: avoid SCK glitches with continuous transfers
  spi: cadence-quadspi: Add missing check for dma_set_mask
      b7feaa49
    • Linus Torvalds's avatar
      Merge tag 'regulator-fix-v6.4-rc6' of... · eee71c34
      Linus Torvalds authored 
      Merge tag 'regulator-fix-v6.4-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator

Pull regulator fix from Mark Brown:
 "The set of regulators described for the Qualcomm PM8550 just seems to
  have been completely wrong and would likely not have worked at all if
  anything tried to actually configure anything except for enabling and
  disabling at runtime"

* tag 'regulator-fix-v6.4-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
  regulator: qcom-rpmh: Fix regulators for PM8550
      eee71c34
    • Linus Torvalds's avatar
      Merge tag 'regmap-fix-v6.4-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap · 231a1e31
      Linus Torvalds authored 
      Pull regmap fix from Mark Brown:
 "Another fix for the maple tree cache, Takashi noticed that unlike
  other caches the maple tree cache didn't check for read only registers
  before trying to sync which would result in spurious syncs for read
  only registers where we don't have a default.

  This was due to the check being open coded in the caches, we now check
  in the shared 'does this register need sync' function so that is fixed
  for this and future caches"

* tag 'regmap-fix-v6.4-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap:
  regmap: regcache: Don't sync read-only registers
      231a1e31
    • Linus Torvalds's avatar
      Merge tag 'media/v6.4-6' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media · c926a55f
      Linus Torvalds authored 
      Pull media fixes from Mauro Carvalho Chehab:
 "A fix for dvb-core to avoid a race condition during DVB board
  registration"

* tag 'media/v6.4-6' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media:
  Revert "media: dvb-core: Fix use-after-free on race condition at dvb_frontend"
      c926a55f
  7. 15 Jun, 2023 24 commits
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