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| author | Carlos López <clopez@suse.de> | 2024-05-27 12:43:52 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-06-12 12:39:45 +0300 |
| commit | 4ed468edfeb54c7202e559eba74c25fac6a0dad0 (patch) | |
| tree | 475bcbf98b7a63e688d532bed5ac78eab79f0b65 | |
| parent | c8f7c80bb84e95565d293a04b14a409341442bdc (diff) | |
| download | linux-4ed468edfeb54c7202e559eba74c25fac6a0dad0.tar.xz | |
tracing/probes: fix error check in parse_btf_field()
[ Upstream commit e569eb34970281438e2b48a3ef11c87459fcfbcb ]
btf_find_struct_member() might return NULL or an error via the
ERR_PTR() macro. However, its caller in parse_btf_field() only checks
for the NULL condition. Fix this by using IS_ERR() and returning the
error up the stack.
Link: https://lore.kernel.org/all/20240527094351.15687-1-clopez@suse.de/
Fixes: c440adfbe3025 ("tracing/probes: Support BTF based data structure field access")
Signed-off-by: Carlos López <clopez@suse.de>
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | kernel/trace/trace_probe.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/trace/trace_probe.c b/kernel/trace/trace_probe.c index 42bc0f362226..1a7e7cf94493 100644 --- a/kernel/trace/trace_probe.c +++ b/kernel/trace/trace_probe.c @@ -553,6 +553,10 @@ static int parse_btf_field(char *fieldname, const struct btf_type *type, anon_offs = 0; field = btf_find_struct_member(ctx->btf, type, fieldname, &anon_offs); + if (IS_ERR(field)) { + trace_probe_log_err(ctx->offset, BAD_BTF_TID); + return PTR_ERR(field); + } if (!field) { trace_probe_log_err(ctx->offset, NO_BTF_FIELD); return -ENOENT; |