[Kernel-packages] [Bug 1888507] Comment bridged from LTC Bugzilla
--- Comment From heinz-werner_se...@de.ibm.com 2020-09-01 03:25 EDT---
und BPF ist derzeit nicht mehr dringend, da arbeiten wir jetzt upstream, und
werden zu einem sp?teren zeitpunt wiederkommen falls es ein target date gibt,
aber das schreib ich dir noch in den LP
Status update from IBM : Currently this feature is not that urgend
anymore. Priorities have moved it to the right. But I will come back,
once this get in plan again and targetted ... Many thx for your support
--
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https://bugs.launchpad.net/bugs/1888507
Title:
[UBUNTU 18.04] BPF programs fail on Ubuntu s390x
Status in Ubuntu on IBM z Systems:
In Progress
Status in linux package in Ubuntu:
New
Status in linux source package in Bionic:
Triaged
Status in linux source package in Focal:
In Progress
Bug description:
[Impact]
Some bpf programs will fail to execute on s390x, returning EFAULT when they
should be able to read user memory.
[Test case]
apt-get source linux
mkdir -p /usr/lib/perf/
cp -a linux-5.4.0/tools/perf/include /usr/lib/perf/
probe_read=$(grep -w probe_read /usr/lib/perf/include/bpf/bpf.h)
probe_read_user=${probe_read//read/read_user}
sed -i "/probe_read)/i$probe_read_user" /usr/lib/perf/include/bpf/bpf.h
probe_read_user_str=${probe_read//read/read_user_str}
sed -i "/probe_read)/i$probe_read_user_str" /usr/lib/perf/include/bpf/bpf.h
ed - linux-5.4.0/tools/perf/examples/bpf/augmented_raw_syscalls.c << EOF
100c
int string_len = probe_read_user_str(_arg->value, arg_len, arg);
.
w
EOF
perf trace -eopenat,augmented_raw_syscalls.c cat /etc/passwd > /dev/null
You should see:
0.332 ( 0.002 ms): cat/3223 openat(dfd: CWD, filename: "/etc/passwd")
= 3
instead of
0.334 ( 0.003 ms): cat/3739 openat(dfd: CWD, filename: "")
= 3
[Potential regressions]
One potential regression is that unprivileged code can be able to exploit the
changes to read or write kernel memory.
--
We need to run BPF filters to analyse and monitor network traffic. The BPF
filters are created by skydive (http://skydive.network). Currently skydive
fails to install BPF filters on s390x (using Ubuntu 18.04 currently, soon
moving to Ubuntu 20.04).
Because of these failures, we decided to try the BPF samples that come
with the kernel first. These samples also fail on s390x while they
work fine on Intel.
shense@boe-build:~/bionic/samples/bpf$ uname -a
Linux boe-build 4.15.0-112-generic #113-Ubuntu SMP Thu Jul 9 23:40:36 UTC
2020 s390x s390x s390x GNU/Linux
Example instructions:
sudo apt install -y dpkg-dev clang llvm libelf-dev
sudo apt-get source linux-image-unsigned-$(uname -r)
cd linux-4.15.0/
make headers_install
make samples/bpf/
Errors:
shense@boe-build:~/bionic/samples/bpf$ sudo ./test_map_in_map
[sudo] password for shense:
invalid relo for insn[4].code 0x85
bpf_load_program() err=22
0: (bf) r7 = r1
1: (b7) r1 = 0
2: (63) *(u32 *)(r10 -32) = r1
3: (bf) r1 = r7
4: (85) call unknown#-1
BPF_CALL uses reserved fields
0: (bf) r7 = r1
1: (b7) r1 = 0
2: (63) *(u32 *)(r10 -32) = r1
3: (bf) r1 = r7
4: (85) call unknown#-1
BPF_CALL uses reserved fields
shense@boe-build:~/bionic/samples/bpf$ sudo ./map_perf_test
invalid relo for insn[22].code 0x85
bpf_load_program() err=22
0: (bf) r7 = r1
1: (18) r1 = 0x207265743a25646e
3: (7b) *(u64 *)(r10 -16) = r1
4: (18) r1 = 0x705f616c6c6f632e
6: (7b) *(u64 *)(r10 -24) = r1
7: (18) r1 = 0x5f6c72755f686d61
9: (7b) *(u64 *)(r10 -32) = r1
10: (18) r1 = 0x7420737472657373
12: (7b) *(u64 *)(r10 -40) = r1
13: (18) r1 = 0x4661696c65642061
15: (7b) *(u64 *)(r10 -48) = r1
16: (b7) r1 = 0
17: (73) *(u8 *)(r10 -8) = r1
18: (b7) r2 = 1
19: (7b) *(u64 *)(r10 -72) = r2
20: (63) *(u32 *)(r10 -76) = r1
21: (bf) r1 = r7
22: (85) call unknown#-1
BPF_CALL uses reserved fields
0: (bf) r7 = r1
1: (18) r1 = 0x207265743a25646e
3: (7b) *(u64 *)(r10 -16) = r1
4: (18) r1 = 0x705f616c6c6f632e
6: (7b) *(u64 *)(r10 -24) = r1
7: (18) r1 = 0x5f6c72755f686d61
9: (7b) *(u64 *)(r10 -32) = r1
10: (18) r1 = 0x7420737472657373
12: (7b) *(u64 *)(r10 -40) = r1
13: (18) r1 = 0x4661696c65642061
15: (7b) *(u64 *)(r10 -48) = r1
16: (b7) r1 = 0
17: (73) *(u8 *)(r10 -8) = r1
18: (b7) r2 = 1
19: (7b) *(u64 *)(r10 -72) = r2
20: (63) *(u32 *)(r10 -76) = r1
21: (bf) r1 = r7
22: (85) call unknown#-1
BPF_CALL uses reserved fields
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[Kernel-packages] [Bug 1888507] Comment bridged from LTC Bugzilla
--- Comment From heinz-werner_se...@de.ibm.com 2020-08-18 06:26 EDT--- @Cascado: IBM's response to your comment suggestion: wer: 1) the offering will be based on Ubuntu 20.04 2) it is okay for us to use clang-8 (actually the userspace code runs in a Ubuntu 18.04 container including the clang-8 package) 3) we will rerun the workload to check if this combination works fine. Does that answer your requesting and let you proceed. Many thanks in advance -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1888507 Title: [UBUNTU 18.04] BPF programs fail on Ubuntu s390x Status in Ubuntu on IBM z Systems: In Progress Status in linux package in Ubuntu: New Status in linux source package in Bionic: In Progress Bug description: We need to run BPF filters to analyse and monitor network traffic. The BPF filters are created by skydive (http://skydive.network). Currently skydive fails to install BPF filters on s390x (using Ubuntu 18.04 currently, soon moving to Ubuntu 20.04). Because of these failures, we decided to try the BPF samples that come with the kernel first. These samples also fail on s390x while they work fine on Intel. shense@boe-build:~/bionic/samples/bpf$ uname -a Linux boe-build 4.15.0-112-generic #113-Ubuntu SMP Thu Jul 9 23:40:36 UTC 2020 s390x s390x s390x GNU/Linux Example instructions: sudo apt install -y dpkg-dev clang llvm libelf-dev sudo apt-get source linux-image-unsigned-$(uname -r) cd linux-4.15.0/ make headers_install make samples/bpf/ Errors: shense@boe-build:~/bionic/samples/bpf$ sudo ./test_map_in_map [sudo] password for shense: invalid relo for insn[4].code 0x85 bpf_load_program() err=22 0: (bf) r7 = r1 1: (b7) r1 = 0 2: (63) *(u32 *)(r10 -32) = r1 3: (bf) r1 = r7 4: (85) call unknown#-1 BPF_CALL uses reserved fields 0: (bf) r7 = r1 1: (b7) r1 = 0 2: (63) *(u32 *)(r10 -32) = r1 3: (bf) r1 = r7 4: (85) call unknown#-1 BPF_CALL uses reserved fields shense@boe-build:~/bionic/samples/bpf$ sudo ./map_perf_test invalid relo for insn[22].code 0x85 bpf_load_program() err=22 0: (bf) r7 = r1 1: (18) r1 = 0x207265743a25646e 3: (7b) *(u64 *)(r10 -16) = r1 4: (18) r1 = 0x705f616c6c6f632e 6: (7b) *(u64 *)(r10 -24) = r1 7: (18) r1 = 0x5f6c72755f686d61 9: (7b) *(u64 *)(r10 -32) = r1 10: (18) r1 = 0x7420737472657373 12: (7b) *(u64 *)(r10 -40) = r1 13: (18) r1 = 0x4661696c65642061 15: (7b) *(u64 *)(r10 -48) = r1 16: (b7) r1 = 0 17: (73) *(u8 *)(r10 -8) = r1 18: (b7) r2 = 1 19: (7b) *(u64 *)(r10 -72) = r2 20: (63) *(u32 *)(r10 -76) = r1 21: (bf) r1 = r7 22: (85) call unknown#-1 BPF_CALL uses reserved fields 0: (bf) r7 = r1 1: (18) r1 = 0x207265743a25646e 3: (7b) *(u64 *)(r10 -16) = r1 4: (18) r1 = 0x705f616c6c6f632e 6: (7b) *(u64 *)(r10 -24) = r1 7: (18) r1 = 0x5f6c72755f686d61 9: (7b) *(u64 *)(r10 -32) = r1 10: (18) r1 = 0x7420737472657373 12: (7b) *(u64 *)(r10 -40) = r1 13: (18) r1 = 0x4661696c65642061 15: (7b) *(u64 *)(r10 -48) = r1 16: (b7) r1 = 0 17: (73) *(u8 *)(r10 -8) = r1 18: (b7) r2 = 1 19: (7b) *(u64 *)(r10 -72) = r2 20: (63) *(u32 *)(r10 -76) = r1 21: (bf) r1 = r7 22: (85) call unknown#-1 BPF_CALL uses reserved fields To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-z-systems/+bug/1888507/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1888507] Comment bridged from LTC Bugzilla
--- Comment From heinz-werner_se...@de.ibm.com 2020-08-14 06:51 EDT--- @Canonical: what is the current expectation on solving this issue. This one it timely critical for our upcoming offering. A comment from Canonicals side would be appreciated.. Many thx in advance -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1888507 Title: [UBUNTU 18.04] BPF programs fail on Ubuntu s390x Status in Ubuntu on IBM z Systems: In Progress Status in linux package in Ubuntu: New Status in linux source package in Bionic: In Progress Bug description: We need to run BPF filters to analyse and monitor network traffic. The BPF filters are created by skydive (http://skydive.network). Currently skydive fails to install BPF filters on s390x (using Ubuntu 18.04 currently, soon moving to Ubuntu 20.04). Because of these failures, we decided to try the BPF samples that come with the kernel first. These samples also fail on s390x while they work fine on Intel. shense@boe-build:~/bionic/samples/bpf$ uname -a Linux boe-build 4.15.0-112-generic #113-Ubuntu SMP Thu Jul 9 23:40:36 UTC 2020 s390x s390x s390x GNU/Linux Example instructions: sudo apt install -y dpkg-dev clang llvm libelf-dev sudo apt-get source linux-image-unsigned-$(uname -r) cd linux-4.15.0/ make headers_install make samples/bpf/ Errors: shense@boe-build:~/bionic/samples/bpf$ sudo ./test_map_in_map [sudo] password for shense: invalid relo for insn[4].code 0x85 bpf_load_program() err=22 0: (bf) r7 = r1 1: (b7) r1 = 0 2: (63) *(u32 *)(r10 -32) = r1 3: (bf) r1 = r7 4: (85) call unknown#-1 BPF_CALL uses reserved fields 0: (bf) r7 = r1 1: (b7) r1 = 0 2: (63) *(u32 *)(r10 -32) = r1 3: (bf) r1 = r7 4: (85) call unknown#-1 BPF_CALL uses reserved fields shense@boe-build:~/bionic/samples/bpf$ sudo ./map_perf_test invalid relo for insn[22].code 0x85 bpf_load_program() err=22 0: (bf) r7 = r1 1: (18) r1 = 0x207265743a25646e 3: (7b) *(u64 *)(r10 -16) = r1 4: (18) r1 = 0x705f616c6c6f632e 6: (7b) *(u64 *)(r10 -24) = r1 7: (18) r1 = 0x5f6c72755f686d61 9: (7b) *(u64 *)(r10 -32) = r1 10: (18) r1 = 0x7420737472657373 12: (7b) *(u64 *)(r10 -40) = r1 13: (18) r1 = 0x4661696c65642061 15: (7b) *(u64 *)(r10 -48) = r1 16: (b7) r1 = 0 17: (73) *(u8 *)(r10 -8) = r1 18: (b7) r2 = 1 19: (7b) *(u64 *)(r10 -72) = r2 20: (63) *(u32 *)(r10 -76) = r1 21: (bf) r1 = r7 22: (85) call unknown#-1 BPF_CALL uses reserved fields 0: (bf) r7 = r1 1: (18) r1 = 0x207265743a25646e 3: (7b) *(u64 *)(r10 -16) = r1 4: (18) r1 = 0x705f616c6c6f632e 6: (7b) *(u64 *)(r10 -24) = r1 7: (18) r1 = 0x5f6c72755f686d61 9: (7b) *(u64 *)(r10 -32) = r1 10: (18) r1 = 0x7420737472657373 12: (7b) *(u64 *)(r10 -40) = r1 13: (18) r1 = 0x4661696c65642061 15: (7b) *(u64 *)(r10 -48) = r1 16: (b7) r1 = 0 17: (73) *(u8 *)(r10 -8) = r1 18: (b7) r2 = 1 19: (7b) *(u64 *)(r10 -72) = r2 20: (63) *(u32 *)(r10 -76) = r1 21: (bf) r1 = r7 22: (85) call unknown#-1 BPF_CALL uses reserved fields To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-z-systems/+bug/1888507/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1888507] Comment bridged from LTC Bugzilla
--- Comment From i...@de.ibm.com 2020-08-04 18:45 EDT---
Hi,
I fixed the skydive header as follows:
--- a/ebpf/defs.h
+++ b/ebpf/defs.h
@@ -56,7 +56,7 @@ static __inline int discret_memcmp(char *s1, char *s2, int n)
/* helper marcro to define a map, socket, kprobe section in the
* eBPF elf file.
*/
-#define MAP(NAME) struct bpf_map_def __section("maps/" #NAME) NAME =
+#define MAP(NAME) struct bpf_map_def __section("maps") NAME =
#define SOCKET(NAME) __section("socket_" #NAME)
#define LICENSE __section("license")
and also tried to cherry-pick some of the older kernel patches I wrote, e.g.:
https://git.kernel.org/pub/scm/linux/kernel/git/s390/linux.git/commit/?h=features=88aa8939c96781089e5ace3492d818074c5c6fe9
https://git.kernel.org/pub/scm/linux/kernel/git/s390/linux.git/commit/?h=features=05a68e892e89c97df6650cd8cc55058002657cbc
https://git.kernel.org/pub/scm/linux/kernel/git/s390/linux.git/commit/?h=features=3f161e0ae863a0456d00e5a6c9c81098c62ab7fe
- the new ones I linked here fix samples and aren't relevant for skydive
- but then I found out that quite some common code is missing as well.
For example, on 20.04 LLVM 10 is default. It contains the following
commit:
commit fbb64aa69835c8e3e9efe0afc8a73058b5a0fb3c # llvmorg-10.0.0
Author: Yonghong Song
Date: Tue Dec 17 16:24:23 2019 -0800
[BPF] extend BTF_KIND_FUNC to cover global, static and extern funcs
which makes clang produce non-backwards-compatible BTF. This leads to:
[14] FUNC bpf_flow_table type_id=12 vlen != 0
libbpf: Error loading .BTF into kernel: -22.
when loading. It's not that BPF devs did not think about this: in case
kernel cannot handle the new BTF_KIND_FUNC bits, they are supposed to be
sanitized by libbpf. However, Ubuntu 20.04 does not ship the newest
libbpf:
# /usr/sbin/bpftool --version
/usr/lib/linux-tools/5.4.0-42-generic/bpftool v5.4.44
whereas the commit that introduced sanitization is in v5.6:
commit 2d3eb67f64ec317bbfe340cfcc8325d40a6ff317 # v5.6
Author: Alexei Starovoitov
Date: Thu Jan 9 22:41:19 2020 -0800
libbpf: Sanitize global functions
Since this now turns into quite an adventure w.r.t. backporting, can't
we try an easier path first? Namely: use clang-8, which is also
available in Ubuntu 20.04, but doesn't include any fancy stuff!
skydive# CLANG=clang-8 GOPATH=$HOME/go make -C ebpf
skydive# bpftool prog load ebpf/flow.o /sys/fs/bpf/flow ; echo $?
0
# bpftool prog load ebpf/flow-gre.o /sys/fs/bpf/flow-gre ; echo $?
0
--
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Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1888507
Title:
[UBUNTU 18.04] BPF programs fail on Ubuntu s390x
Status in Ubuntu on IBM z Systems:
In Progress
Status in linux package in Ubuntu:
New
Status in linux source package in Bionic:
In Progress
Bug description:
We need to run BPF filters to analyse and monitor network traffic. The
BPF filters are created by skydive (http://skydive.network). Currently
skydive fails to install BPF filters on s390x (using Ubuntu 18.04
currently, soon moving to Ubuntu 20.04).
Because of these failures, we decided to try the BPF samples that come
with the kernel first. These samples also fail on s390x while they
work fine on Intel.
shense@boe-build:~/bionic/samples/bpf$ uname -a
Linux boe-build 4.15.0-112-generic #113-Ubuntu SMP Thu Jul 9 23:40:36 UTC
2020 s390x s390x s390x GNU/Linux
Example instructions:
sudo apt install -y dpkg-dev clang llvm libelf-dev
sudo apt-get source linux-image-unsigned-$(uname -r)
cd linux-4.15.0/
make headers_install
make samples/bpf/
Errors:
shense@boe-build:~/bionic/samples/bpf$ sudo ./test_map_in_map
[sudo] password for shense:
invalid relo for insn[4].code 0x85
bpf_load_program() err=22
0: (bf) r7 = r1
1: (b7) r1 = 0
2: (63) *(u32 *)(r10 -32) = r1
3: (bf) r1 = r7
4: (85) call unknown#-1
BPF_CALL uses reserved fields
0: (bf) r7 = r1
1: (b7) r1 = 0
2: (63) *(u32 *)(r10 -32) = r1
3: (bf) r1 = r7
4: (85) call unknown#-1
BPF_CALL uses reserved fields
shense@boe-build:~/bionic/samples/bpf$ sudo ./map_perf_test
invalid relo for insn[22].code 0x85
bpf_load_program() err=22
0: (bf) r7 = r1
1: (18) r1 = 0x207265743a25646e
3: (7b) *(u64 *)(r10 -16) = r1
4: (18) r1 = 0x705f616c6c6f632e
6: (7b) *(u64 *)(r10 -24) = r1
7: (18) r1 = 0x5f6c72755f686d61
9: (7b) *(u64 *)(r10 -32) = r1
10: (18) r1 = 0x7420737472657373
12: (7b) *(u64 *)(r10 -40) = r1
13: (18) r1 = 0x4661696c65642061
15: (7b) *(u64 *)(r10 -48) = r1
16: (b7) r1 = 0
17: (73) *(u8 *)(r10 -8) = r1
18: (b7) r2 = 1
19: (7b) *(u64 *)(r10 -72) = r2
20: (63) *(u32 *)(r10 -76) = r1
21: (bf) r1 = r7
22: (85) call unknown#-1
BPF_CALL uses reserved fields
0: (bf) r7 = r1
1: (18) r1 = 0x207265743a25646e
3: (7b) *(u64 *)(r10 -16) = r1
4: (18) r1 = 0x705f616c6c6f632e
6: (7b) *(u64 *)(r10 -24) = r1
7: (18) r1 = 0x5f6c72755f686d61
9:
[Kernel-packages] [Bug 1888507] Comment bridged from LTC Bugzilla
--- Comment From i...@de.ibm.com 2020-07-28 08:05 EDT--- Interesting, this might explain why the relocation issue did not trigger for me. In the meantime I posted fixes to other bpf/samples issues: https://lore.kernel.org/bpf/20200728120059.132256-1-...@linux.ibm.com/ -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1888507 Title: [UBUNTU 18.04] BPF programs fail on Ubuntu s390x Status in Ubuntu on IBM z Systems: In Progress Status in linux package in Ubuntu: New Status in linux source package in Bionic: In Progress Bug description: We need to run BPF filters to analyse and monitor network traffic. The BPF filters are created by skydive (http://skydive.network). Currently skydive fails to install BPF filters on s390x (using Ubuntu 18.04 currently, soon moving to Ubuntu 20.04). Because of these failures, we decided to try the BPF samples that come with the kernel first. These samples also fail on s390x while they work fine on Intel. shense@boe-build:~/bionic/samples/bpf$ uname -a Linux boe-build 4.15.0-112-generic #113-Ubuntu SMP Thu Jul 9 23:40:36 UTC 2020 s390x s390x s390x GNU/Linux Example instructions: sudo apt install -y dpkg-dev clang llvm libelf-dev sudo apt-get source linux-image-unsigned-$(uname -r) cd linux-4.15.0/ make headers_install make samples/bpf/ Errors: shense@boe-build:~/bionic/samples/bpf$ sudo ./test_map_in_map [sudo] password for shense: invalid relo for insn[4].code 0x85 bpf_load_program() err=22 0: (bf) r7 = r1 1: (b7) r1 = 0 2: (63) *(u32 *)(r10 -32) = r1 3: (bf) r1 = r7 4: (85) call unknown#-1 BPF_CALL uses reserved fields 0: (bf) r7 = r1 1: (b7) r1 = 0 2: (63) *(u32 *)(r10 -32) = r1 3: (bf) r1 = r7 4: (85) call unknown#-1 BPF_CALL uses reserved fields shense@boe-build:~/bionic/samples/bpf$ sudo ./map_perf_test invalid relo for insn[22].code 0x85 bpf_load_program() err=22 0: (bf) r7 = r1 1: (18) r1 = 0x207265743a25646e 3: (7b) *(u64 *)(r10 -16) = r1 4: (18) r1 = 0x705f616c6c6f632e 6: (7b) *(u64 *)(r10 -24) = r1 7: (18) r1 = 0x5f6c72755f686d61 9: (7b) *(u64 *)(r10 -32) = r1 10: (18) r1 = 0x7420737472657373 12: (7b) *(u64 *)(r10 -40) = r1 13: (18) r1 = 0x4661696c65642061 15: (7b) *(u64 *)(r10 -48) = r1 16: (b7) r1 = 0 17: (73) *(u8 *)(r10 -8) = r1 18: (b7) r2 = 1 19: (7b) *(u64 *)(r10 -72) = r2 20: (63) *(u32 *)(r10 -76) = r1 21: (bf) r1 = r7 22: (85) call unknown#-1 BPF_CALL uses reserved fields 0: (bf) r7 = r1 1: (18) r1 = 0x207265743a25646e 3: (7b) *(u64 *)(r10 -16) = r1 4: (18) r1 = 0x705f616c6c6f632e 6: (7b) *(u64 *)(r10 -24) = r1 7: (18) r1 = 0x5f6c72755f686d61 9: (7b) *(u64 *)(r10 -32) = r1 10: (18) r1 = 0x7420737472657373 12: (7b) *(u64 *)(r10 -40) = r1 13: (18) r1 = 0x4661696c65642061 15: (7b) *(u64 *)(r10 -48) = r1 16: (b7) r1 = 0 17: (73) *(u8 *)(r10 -8) = r1 18: (b7) r2 = 1 19: (7b) *(u64 *)(r10 -72) = r2 20: (63) *(u32 *)(r10 -76) = r1 21: (bf) r1 = r7 22: (85) call unknown#-1 BPF_CALL uses reserved fields To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-z-systems/+bug/1888507/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
