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anubisg1 opened this issue May 24, 2013 · 6 comments
Closed

enable TCP_MD5SIG in the kernel config #302

anubisg1 opened this issue May 24, 2013 · 6 comments

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@anubisg1
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I'm running Quagga on my raspberry pi. While testing the different features i noted that BGP md5 authentication failed.

2013/05/23 21:49:12 BGP: sockopt_tcp_signature: setsockopt(6): Protocol not available
2013/05/23 21:49:12 BGP: can't set TCP_MD5SIG option on socket 6: Protocol not available

after some investigation i found out that the kernel doesn't support this feature and should be enabled:

from config file i get:
CONFIG_TCP_MD5SIG is not set

please enable TCP MD5. Debian had this enabled long time ago: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=443742

kernel i'm running is 3.6.11+

root@ROUTER-RASP-BB2 /home/pi # cat /etc/debian_version
7.0
root@ROUTER-RASP-BB2 /home/pi # uname -a
Linux ROUTER-RASP-BB2 3.6.11+ #456 PREEMPT Mon May 20 17:42:15 BST 2013 armv6l GNU/Linux

i reported also to the raspbian project: https://bugs.launchpad.net/raspbian/+bug/1183546 , the raspbian official kernel is compiled with this option set and things works as they should.
@notro notro mentioned this issue Dec 29, 2014
Closed
popcornmix pushed a commit that referenced this issue May 9, 2016
@vsyrjala @linusw
gpiolib-acpi: Duplicate con_id string when adding it to the crs looku…
7df89e9 
…p list

Calling gpiod_get() from a module and then unloading the module leads to an
oops due to acpi_can_fallback_to_crs() storing the pointer to the passed
'con_id' string onto acpi_crs_lookup_list. The next guy to come along will then
try to access the string but the memory may now be gone with the module.
Make a copy of the passed string instead, and store the copy on the list.

BUG: unable to handle kernel paging request at ffffffffa03e7855
IP: [<ffffffff81338322>] strcmp+0x12/0x30
PGD 2a07067 PUD 2a08063 PMD 74720067 PTE 0
Oops: 0000 [#1] PREEMPT SMP
Modules linked in: i915(+) drm_kms_helper drm intel_gtt snd_hda_codec snd_hda_core i2c_algo_bit syscopya
rea sysfillrect sysimgblt fb_sys_fops agpgart snd_soc_sst_bytcr_rt5640 coretemp hwmon intel_rapl intel_soc_dts_thermal
punit_atom_debug snd_soc_rt5640 snd_soc_rl6231 serio snd_intel_sst_acpi snd_intel_sst_core video snd_soc_sst_mfld_platf
orm snd_soc_sst_match backlight int3402_thermal processor_thermal_device int3403_thermal int3400_thermal acpi_thermal_r
el snd_soc_core intel_soc_dts_iosf int340x_thermal_zone snd_compress i2c_hid hid snd_pcm snd_timer snd soundcore evdev
sch_fq_codel efivarfs ipv6 autofs4 [last unloaded: drm]
CPU: 2 PID: 3064 Comm: modprobe Tainted: G     U  W       4.6.0-rc3-ffrd-ipvr+ #302
Hardware name: Intel Corp. VALLEYVIEW C0 PLATFORM/BYT-T FFD8, BIOS BLAKFF81.X64.0088.R10.1403240443 FFD8
_X64_R_2014_13_1_00 03/24/2014
task: ffff8800701cd200 ti: ffff880070034000 task.ti: ffff880070034000
RIP: 0010:[<ffffffff81338322>]  [<ffffffff81338322>] strcmp+0x12/0x30
RSP: 0000:ffff880070037748  EFLAGS: 00010286
RAX: 0000000080000000 RBX: ffff88007a342800 RCX: 0000000000000006
RDX: 0000000000000006 RSI: ffffffffa054f856 RDI: ffffffffa03e7856
RBP: ffff880070037748 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffffa054f855
R13: ffff88007281cae0 R14: 0000000000000010 R15: ffffffffffffffea
FS:  00007faa51447700(0000) GS:ffff880079300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffa03e7855 CR3: 0000000041eba000 CR4: 00000000001006e0
Stack:
 ffff880070037770 ffffffff8136ad28 ffffffffa054f855 0000000000000000
 ffff88007a0a2098 ffff8800700377e8 ffffffff8136852e ffff88007a342800
 00000007700377a0 ffff8800700377a0 ffffffff81412442 70672d6c656e6170
Call Trace:
 [<ffffffff8136ad28>] acpi_can_fallback_to_crs+0x88/0x100
 [<ffffffff8136852e>] gpiod_get_index+0x25e/0x310
 [<ffffffff81412442>] ? mipi_dsi_attach+0x22/0x30
 [<ffffffff813685f2>] gpiod_get+0x12/0x20
 [<ffffffffa04fcf41>] intel_dsi_init+0x421/0x480 [i915]
 [<ffffffffa04d3783>] intel_modeset_init+0x853/0x16b0 [i915]
 [<ffffffffa0504864>] ? intel_setup_gmbus+0x214/0x260 [i915]
 [<ffffffffa0510158>] i915_driver_load+0xdc8/0x19b0 [i915]
 [<ffffffff8160fb53>] ? _raw_spin_unlock_irqrestore+0x43/0x70
 [<ffffffffa026b13b>] drm_dev_register+0xab/0xc0 [drm]
 [<ffffffffa026d7b3>] drm_get_pci_dev+0x93/0x1f0 [drm]
 [<ffffffff8160fb53>] ? _raw_spin_unlock_irqrestore+0x43/0x70
 [<ffffffffa043f1f4>] i915_pci_probe+0x34/0x50 [i915]
 [<ffffffff81379751>] pci_device_probe+0x91/0x100
 [<ffffffff8141a75a>] driver_probe_device+0x20a/0x2d0
 [<ffffffff8141a8be>] __driver_attach+0x9e/0xb0
 [<ffffffff8141a820>] ? driver_probe_device+0x2d0/0x2d0
 [<ffffffff81418439>] bus_for_each_dev+0x69/0xa0
 [<ffffffff8141a04e>] driver_attach+0x1e/0x20
 [<ffffffff81419c20>] bus_add_driver+0x1c0/0x240
 [<ffffffff8141b6d0>] driver_register+0x60/0xe0
 [<ffffffff81377d20>] __pci_register_driver+0x60/0x70
 [<ffffffffa026d9f4>] drm_pci_init+0xe4/0x110 [drm]
 [<ffffffff810ce04e>] ? trace_hardirqs_on+0xe/0x10
 [<ffffffffa02f1000>] ? 0xffffffffa02f1000
 [<ffffffffa02f1094>] i915_init+0x94/0x9b [i915]
 [<ffffffff810003bb>] do_one_initcall+0x8b/0x1c0
 [<ffffffff810eb616>] ? rcu_read_lock_sched_held+0x86/0x90
 [<ffffffff811de6d6>] ? kmem_cache_alloc_trace+0x1f6/0x270
 [<ffffffff81183826>] do_init_module+0x60/0x1dc
 [<ffffffff81115a8d>] load_module+0x1d0d/0x2390
 [<ffffffff811120b0>] ? __symbol_put+0x70/0x70
 [<ffffffff811f41b2>] ? kernel_read_file+0x92/0x120
 [<ffffffff811162f4>] SYSC_finit_module+0xa4/0xb0
 [<ffffffff8111631e>] SyS_finit_module+0xe/0x10
 [<ffffffff81001ff3>] do_syscall_64+0x63/0x350
 [<ffffffff816103da>] entry_SYSCALL64_slow_path+0x25/0x25
Code: f7 48 8d 76 01 48 8d 52 01 0f b6 4e ff 84 c9 88 4a ff 75 ed 5d c3 0f 1f 00 55 48 89 e5 eb 04 84 c0
 74 18 48 8d 7f 01 48 8d 76 01 <0f> b6 47 ff 3a 46 ff 74 eb 19 c0 83 c8 01 5d c3 31 c0 5d c3 66
RIP  [<ffffffff81338322>] strcmp+0x12/0x30
 RSP <ffff880070037748>
CR2: ffffffffa03e7855

v2: Make the copied con_id const

Cc: Dmitry Torokhov <[email protected]>
Cc: Mika Westerberg <[email protected]>
Cc: Alexandre Courbot <[email protected]>
Cc: [email protected]
Fixes: 10cf489 ("gpiolib: tighten up ACPI legacy gpio lookups")
Signed-off-by: Ville Syrjälä <[email protected]>
Acked-by: Mika Westerberg <[email protected]>
Reviewed-by: Dmitry Torokhov <[email protected]>
Signed-off-by: Linus Walleij <[email protected]>
popcornmix pushed a commit that referenced this issue May 13, 2016
@vsyrjala @gregkh
gpiolib-acpi: Duplicate con_id string when adding it to the crs looku…
b9a9e4a 
…p list

commit 7df89e9 upstream.

Calling gpiod_get() from a module and then unloading the module leads to an
oops due to acpi_can_fallback_to_crs() storing the pointer to the passed
'con_id' string onto acpi_crs_lookup_list. The next guy to come along will then
try to access the string but the memory may now be gone with the module.
Make a copy of the passed string instead, and store the copy on the list.

BUG: unable to handle kernel paging request at ffffffffa03e7855
IP: [<ffffffff81338322>] strcmp+0x12/0x30
PGD 2a07067 PUD 2a08063 PMD 74720067 PTE 0
Oops: 0000 [#1] PREEMPT SMP
Modules linked in: i915(+) drm_kms_helper drm intel_gtt snd_hda_codec snd_hda_core i2c_algo_bit syscopya
rea sysfillrect sysimgblt fb_sys_fops agpgart snd_soc_sst_bytcr_rt5640 coretemp hwmon intel_rapl intel_soc_dts_thermal
punit_atom_debug snd_soc_rt5640 snd_soc_rl6231 serio snd_intel_sst_acpi snd_intel_sst_core video snd_soc_sst_mfld_platf
orm snd_soc_sst_match backlight int3402_thermal processor_thermal_device int3403_thermal int3400_thermal acpi_thermal_r
el snd_soc_core intel_soc_dts_iosf int340x_thermal_zone snd_compress i2c_hid hid snd_pcm snd_timer snd soundcore evdev
sch_fq_codel efivarfs ipv6 autofs4 [last unloaded: drm]
CPU: 2 PID: 3064 Comm: modprobe Tainted: G     U  W       4.6.0-rc3-ffrd-ipvr+ #302
Hardware name: Intel Corp. VALLEYVIEW C0 PLATFORM/BYT-T FFD8, BIOS BLAKFF81.X64.0088.R10.1403240443 FFD8
_X64_R_2014_13_1_00 03/24/2014
task: ffff8800701cd200 ti: ffff880070034000 task.ti: ffff880070034000
RIP: 0010:[<ffffffff81338322>]  [<ffffffff81338322>] strcmp+0x12/0x30
RSP: 0000:ffff880070037748  EFLAGS: 00010286
RAX: 0000000080000000 RBX: ffff88007a342800 RCX: 0000000000000006
RDX: 0000000000000006 RSI: ffffffffa054f856 RDI: ffffffffa03e7856
RBP: ffff880070037748 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffffa054f855
R13: ffff88007281cae0 R14: 0000000000000010 R15: ffffffffffffffea
FS:  00007faa51447700(0000) GS:ffff880079300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffa03e7855 CR3: 0000000041eba000 CR4: 00000000001006e0
Stack:
 ffff880070037770 ffffffff8136ad28 ffffffffa054f855 0000000000000000
 ffff88007a0a2098 ffff8800700377e8 ffffffff8136852e ffff88007a342800
 00000007700377a0 ffff8800700377a0 ffffffff81412442 70672d6c656e6170
Call Trace:
 [<ffffffff8136ad28>] acpi_can_fallback_to_crs+0x88/0x100
 [<ffffffff8136852e>] gpiod_get_index+0x25e/0x310
 [<ffffffff81412442>] ? mipi_dsi_attach+0x22/0x30
 [<ffffffff813685f2>] gpiod_get+0x12/0x20
 [<ffffffffa04fcf41>] intel_dsi_init+0x421/0x480 [i915]
 [<ffffffffa04d3783>] intel_modeset_init+0x853/0x16b0 [i915]
 [<ffffffffa0504864>] ? intel_setup_gmbus+0x214/0x260 [i915]
 [<ffffffffa0510158>] i915_driver_load+0xdc8/0x19b0 [i915]
 [<ffffffff8160fb53>] ? _raw_spin_unlock_irqrestore+0x43/0x70
 [<ffffffffa026b13b>] drm_dev_register+0xab/0xc0 [drm]
 [<ffffffffa026d7b3>] drm_get_pci_dev+0x93/0x1f0 [drm]
 [<ffffffff8160fb53>] ? _raw_spin_unlock_irqrestore+0x43/0x70
 [<ffffffffa043f1f4>] i915_pci_probe+0x34/0x50 [i915]
 [<ffffffff81379751>] pci_device_probe+0x91/0x100
 [<ffffffff8141a75a>] driver_probe_device+0x20a/0x2d0
 [<ffffffff8141a8be>] __driver_attach+0x9e/0xb0
 [<ffffffff8141a820>] ? driver_probe_device+0x2d0/0x2d0
 [<ffffffff81418439>] bus_for_each_dev+0x69/0xa0
 [<ffffffff8141a04e>] driver_attach+0x1e/0x20
 [<ffffffff81419c20>] bus_add_driver+0x1c0/0x240
 [<ffffffff8141b6d0>] driver_register+0x60/0xe0
 [<ffffffff81377d20>] __pci_register_driver+0x60/0x70
 [<ffffffffa026d9f4>] drm_pci_init+0xe4/0x110 [drm]
 [<ffffffff810ce04e>] ? trace_hardirqs_on+0xe/0x10
 [<ffffffffa02f1000>] ? 0xffffffffa02f1000
 [<ffffffffa02f1094>] i915_init+0x94/0x9b [i915]
 [<ffffffff810003bb>] do_one_initcall+0x8b/0x1c0
 [<ffffffff810eb616>] ? rcu_read_lock_sched_held+0x86/0x90
 [<ffffffff811de6d6>] ? kmem_cache_alloc_trace+0x1f6/0x270
 [<ffffffff81183826>] do_init_module+0x60/0x1dc
 [<ffffffff81115a8d>] load_module+0x1d0d/0x2390
 [<ffffffff811120b0>] ? __symbol_put+0x70/0x70
 [<ffffffff811f41b2>] ? kernel_read_file+0x92/0x120
 [<ffffffff811162f4>] SYSC_finit_module+0xa4/0xb0
 [<ffffffff8111631e>] SyS_finit_module+0xe/0x10
 [<ffffffff81001ff3>] do_syscall_64+0x63/0x350
 [<ffffffff816103da>] entry_SYSCALL64_slow_path+0x25/0x25
Code: f7 48 8d 76 01 48 8d 52 01 0f b6 4e ff 84 c9 88 4a ff 75 ed 5d c3 0f 1f 00 55 48 89 e5 eb 04 84 c0
 74 18 48 8d 7f 01 48 8d 76 01 <0f> b6 47 ff 3a 46 ff 74 eb 19 c0 83 c8 01 5d c3 31 c0 5d c3 66
RIP  [<ffffffff81338322>] strcmp+0x12/0x30
 RSP <ffff880070037748>
CR2: ffffffffa03e7855

v2: Make the copied con_id const

Cc: Dmitry Torokhov <[email protected]>
Cc: Mika Westerberg <[email protected]>
Cc: Alexandre Courbot <[email protected]>
Fixes: 10cf489 ("gpiolib: tighten up ACPI legacy gpio lookups")
Signed-off-by: Ville Syrjälä <[email protected]>
Acked-by: Mika Westerberg <[email protected]>
Reviewed-by: Dmitry Torokhov <[email protected]>
Signed-off-by: Linus Walleij <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
@Ruffio
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Ruffio commented Jul 28, 2016

@anubisg1 has this issue been resolved? If yes, then please close this issue.

@Ruffio
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Ruffio commented Aug 29, 2016

@popcornmix this issue should be closed as there have been no activity since 2013, it looks like to have some PR merged in 2014 and no response to my ping a month ago, has been responded

@JamesH65
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Contributor

Closing due to lack of activity. Reopen if you feel this issue is still relevant.

@arbitrix
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I'd like to see this re-opened if possible. The the time being BGP supports either insecure sessions or less insecure MG5 sessions. The latter require the CONFIG_TCP_MD5SIG to be set.

It would be nice to be able to do a BGP lab without having to recompile the kernel and then reconcile it with Raspbian updates across many machines.

@JamesH65
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As with any kernel change requests, we are mostly interesting in ensuring that there are no major memory or performance changes. Any idea on the impact of this change on either of those?

@JamesH65 JamesH65 reopened this Sep 19, 2018
@arbitrix
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I have since learned that a VPN tunnel of sorts is a better approach to secure BGP sessions in my case. MD5 is terribly outdated and I can use WireGuard/IPSEC/OpenVPN instead.

@pelwell pelwell closed this as completed Sep 25, 2018
popcornmix pushed a commit that referenced this issue Apr 8, 2019
@lunn @gregkh
net: dsa: mv88e6xxx: Add lockdep classes to fix false positive splat
660b8b7 
[ Upstream commit f6d9758 ]

The following false positive lockdep splat has been observed.

======================================================
WARNING: possible circular locking dependency detected
4.20.0+ #302 Not tainted
------------------------------------------------------
systemd-udevd/160 is trying to acquire lock:
edea6080 (&chip->reg_lock){+.+.}, at: __setup_irq+0x640/0x704

but task is already holding lock:
edff0340 (&desc->request_mutex){+.+.}, at: __setup_irq+0xa0/0x704

which lock already depends on the new lock.

the existing dependency chain (in reverse order) is:

-> #1 (&desc->request_mutex){+.+.}:
       mutex_lock_nested+0x1c/0x24
       __setup_irq+0xa0/0x704
       request_threaded_irq+0xd0/0x150
       mv88e6xxx_probe+0x41c/0x694 [mv88e6xxx]
       mdio_probe+0x2c/0x54
       really_probe+0x200/0x2c4
       driver_probe_device+0x5c/0x174
       __driver_attach+0xd8/0xdc
       bus_for_each_dev+0x58/0x7c
       bus_add_driver+0xe4/0x1f0
       driver_register+0x7c/0x110
       mdio_driver_register+0x24/0x58
       do_one_initcall+0x74/0x2e8
       do_init_module+0x60/0x1d0
       load_module+0x1968/0x1ff4
       sys_finit_module+0x8c/0x98
       ret_fast_syscall+0x0/0x28
       0xbedf2ae8

-> #0 (&chip->reg_lock){+.+.}:
       __mutex_lock+0x50/0x8b8
       mutex_lock_nested+0x1c/0x24
       __setup_irq+0x640/0x704
       request_threaded_irq+0xd0/0x150
       mv88e6xxx_g2_irq_setup+0xcc/0x1b4 [mv88e6xxx]
       mv88e6xxx_probe+0x44c/0x694 [mv88e6xxx]
       mdio_probe+0x2c/0x54
       really_probe+0x200/0x2c4
       driver_probe_device+0x5c/0x174
       __driver_attach+0xd8/0xdc
       bus_for_each_dev+0x58/0x7c
       bus_add_driver+0xe4/0x1f0
       driver_register+0x7c/0x110
       mdio_driver_register+0x24/0x58
       do_one_initcall+0x74/0x2e8
       do_init_module+0x60/0x1d0
       load_module+0x1968/0x1ff4
       sys_finit_module+0x8c/0x98
       ret_fast_syscall+0x0/0x28
       0xbedf2ae8

other info that might help us debug this:

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&desc->request_mutex);
                               lock(&chip->reg_lock);
                               lock(&desc->request_mutex);
  lock(&chip->reg_lock);

&desc->request_mutex refer to two different mutex. #1 is the GPIO for
the chip interrupt. #2 is the chained interrupt between global 1 and
global 2.

Add lockdep classes to the GPIO interrupt to avoid this.

Reported-by: Russell King <[email protected]>
Signed-off-by: Andrew Lunn <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

Signed-off-by: Sasha Levin <[email protected]>
popcornmix pushed a commit that referenced this issue Apr 8, 2019
@lunn @gregkh
net: dsa: mv88e6xxx: Add lockdep classes to fix false positive splat
c6fb45d 
[ Upstream commit f6d9758 ]

The following false positive lockdep splat has been observed.

======================================================
WARNING: possible circular locking dependency detected
4.20.0+ #302 Not tainted
------------------------------------------------------
systemd-udevd/160 is trying to acquire lock:
edea6080 (&chip->reg_lock){+.+.}, at: __setup_irq+0x640/0x704

but task is already holding lock:
edff0340 (&desc->request_mutex){+.+.}, at: __setup_irq+0xa0/0x704

which lock already depends on the new lock.

the existing dependency chain (in reverse order) is:

-> #1 (&desc->request_mutex){+.+.}:
       mutex_lock_nested+0x1c/0x24
       __setup_irq+0xa0/0x704
       request_threaded_irq+0xd0/0x150
       mv88e6xxx_probe+0x41c/0x694 [mv88e6xxx]
       mdio_probe+0x2c/0x54
       really_probe+0x200/0x2c4
       driver_probe_device+0x5c/0x174
       __driver_attach+0xd8/0xdc
       bus_for_each_dev+0x58/0x7c
       bus_add_driver+0xe4/0x1f0
       driver_register+0x7c/0x110
       mdio_driver_register+0x24/0x58
       do_one_initcall+0x74/0x2e8
       do_init_module+0x60/0x1d0
       load_module+0x1968/0x1ff4
       sys_finit_module+0x8c/0x98
       ret_fast_syscall+0x0/0x28
       0xbedf2ae8

-> #0 (&chip->reg_lock){+.+.}:
       __mutex_lock+0x50/0x8b8
       mutex_lock_nested+0x1c/0x24
       __setup_irq+0x640/0x704
       request_threaded_irq+0xd0/0x150
       mv88e6xxx_g2_irq_setup+0xcc/0x1b4 [mv88e6xxx]
       mv88e6xxx_probe+0x44c/0x694 [mv88e6xxx]
       mdio_probe+0x2c/0x54
       really_probe+0x200/0x2c4
       driver_probe_device+0x5c/0x174
       __driver_attach+0xd8/0xdc
       bus_for_each_dev+0x58/0x7c
       bus_add_driver+0xe4/0x1f0
       driver_register+0x7c/0x110
       mdio_driver_register+0x24/0x58
       do_one_initcall+0x74/0x2e8
       do_init_module+0x60/0x1d0
       load_module+0x1968/0x1ff4
       sys_finit_module+0x8c/0x98
       ret_fast_syscall+0x0/0x28
       0xbedf2ae8

other info that might help us debug this:

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&desc->request_mutex);
                               lock(&chip->reg_lock);
                               lock(&desc->request_mutex);
  lock(&chip->reg_lock);

&desc->request_mutex refer to two different mutex. #1 is the GPIO for
the chip interrupt. #2 is the chained interrupt between global 1 and
global 2.

Add lockdep classes to the GPIO interrupt to avoid this.

Reported-by: Russell King <[email protected]>
Signed-off-by: Andrew Lunn <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

Signed-off-by: Sasha Levin <[email protected]>
@fedepaol fedepaol mentioned this issue Dec 16, 2021
Closed
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5 participants
@arbitrix @Ruffio @JamesH65 @anubisg1 @pelwell