diff options
| author | Ilya Leoshkevich <iii@linux.ibm.com> | 2025-05-12 14:26:15 +0200 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2025-05-14 17:47:41 -0700 |
| commit | 5f55f2168432298f5a55294831ab6a76a10cb3c3 (patch) | |
| tree | 4d163900673529b41a3cfb5b6c40fd6cc2f19a03 /scripts/lib/kdoc/kdoc_re.py | |
| parent | 4dd372de3fde1afab3adf231e8b2962c40200387 (diff) | |
s390/bpf: Store backchain even for leaf progs
Currently a crash in a leaf prog (caused by a bug) produces the
following call trace:
[<000003ff600ebf00>] bpf_prog_6df0139e1fbf2789_fentry+0x20/0x78
[<0000000000000000>] 0x0
This is because leaf progs do not store backchain. Fix by making all
progs do it. This is what GCC and Clang-generated code does as well.
Now the call trace looks like this:
[<000003ff600eb0f2>] bpf_prog_6df0139e1fbf2789_fentry+0x2a/0x80
[<000003ff600ed096>] bpf_trampoline_201863462940+0x96/0xf4
[<000003ff600e3a40>] bpf_prog_05f379658fdd72f2_classifier_0+0x58/0xc0
[<000003ffe0aef070>] bpf_test_run+0x210/0x390
[<000003ffe0af0dc2>] bpf_prog_test_run_skb+0x25a/0x668
[<000003ffe038a90e>] __sys_bpf+0xa46/0xdb0
[<000003ffe038ad0c>] __s390x_sys_bpf+0x44/0x50
[<000003ffe0defea8>] __do_syscall+0x150/0x280
[<000003ffe0e01d5c>] system_call+0x74/0x98
Fixes: 054623105728 ("s390/bpf: Add s390x eBPF JIT compiler backend")
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Link: https://lore.kernel.org/r/20250512122717.54878-1-iii@linux.ibm.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'scripts/lib/kdoc/kdoc_re.py')
0 files changed, 0 insertions, 0 deletions