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| author | Vasily Gorbik <gor@linux.ibm.com> | 2022-03-05 21:10:49 +0300 |
|---|---|---|
| committer | Vasily Gorbik <gor@linux.ibm.com> | 2022-03-27 23:18:39 +0300 |
| commit | afacda5faabdfe0f0e91e89db3ff1dc0b46f669a (patch) | |
| tree | 3f362fea8af4bd6cf50fd64e9caff0e36f77260d /arch/s390/lib | |
| parent | 708b13763920ab3c191b31da555f2d90eef4c618 (diff) | |
| download | linux-afacda5faabdfe0f0e91e89db3ff1dc0b46f669a.tar.xz | |
s390/test_unwind: verify __kretprobe_trampoline is replaced
Reviewed-by: Tobias Huschle <huschle@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'arch/s390/lib')
| -rw-r--r-- | arch/s390/lib/test_unwind.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/arch/s390/lib/test_unwind.c b/arch/s390/lib/test_unwind.c index 468e1ce66a33..9bb067321ab4 100644 --- a/arch/s390/lib/test_unwind.c +++ b/arch/s390/lib/test_unwind.c @@ -47,7 +47,7 @@ static void print_backtrace(char *bt) static noinline int test_unwind(struct task_struct *task, struct pt_regs *regs, unsigned long sp) { - int frame_count, prev_is_func2, seen_func2_func1; + int frame_count, prev_is_func2, seen_func2_func1, seen_kretprobe_trampoline; const int max_frames = 128; struct unwind_state state; size_t bt_pos = 0; @@ -63,6 +63,7 @@ static noinline int test_unwind(struct task_struct *task, struct pt_regs *regs, frame_count = 0; prev_is_func2 = 0; seen_func2_func1 = 0; + seen_kretprobe_trampoline = 0; unwind_for_each_frame(&state, task, regs, sp) { unsigned long addr = unwind_get_return_address(&state); char sym[KSYM_SYMBOL_LEN]; @@ -88,6 +89,8 @@ static noinline int test_unwind(struct task_struct *task, struct pt_regs *regs, if (prev_is_func2 && str_has_prefix(sym, "unwindme_func1")) seen_func2_func1 = 1; prev_is_func2 = str_has_prefix(sym, "unwindme_func2"); + if (str_has_prefix(sym, "__kretprobe_trampoline+0x0/")) + seen_kretprobe_trampoline = 1; } /* Check the results. */ @@ -103,6 +106,10 @@ static noinline int test_unwind(struct task_struct *task, struct pt_regs *regs, kunit_err(current_test, "Maximum number of frames exceeded\n"); ret = -EINVAL; } + if (seen_kretprobe_trampoline) { + kunit_err(current_test, "__kretprobe_trampoline+0x0 in unwinding results\n"); + ret = -EINVAL; + } if (ret || force_bt) print_backtrace(bt); kfree(bt); |