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libdrgn: fix note name matching

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The current code matches the desired note name as a prefix, but we need
an exact match.

Fixes: 75c3679147 ("Rewrite drgn core in C")
Signed-off-by: Omar Sandoval <osandov@osandov.com>
This commit is contained in:
Omar Sandoval 2021-12-03 12:01:15 -08:00
parent 0e318754fe
commit 91f6d03ee8
1 changed files with 5 additions and 3 deletions
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8
libdrgn/program.c
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@ -293,11 +293,13 @@ drgn_program_set_core_dump(struct drgn_program *prog, const char *path)
name = (char *)data->d_buf + name_offset;
desc = (char *)data->d_buf + desc_offset;
if (strncmp(name, "CORE", nhdr.n_namesz) == 0) {
if (nhdr.n_namesz == sizeof("CORE") &&
memcmp(name, "CORE", sizeof("CORE")) == 0) {
if (nhdr.n_type == NT_TASKSTRUCT)
have_nt_taskstruct = true;
} else if (strncmp(name, "VMCOREINFO",
nhdr.n_namesz) == 0) {
} else if (nhdr.n_namesz == sizeof("VMCOREINFO") &&
memcmp(name, "VMCOREINFO",
sizeof("VMCOREINFO")) == 0) {
vmcoreinfo_note = desc;
vmcoreinfo_size = nhdr.n_descsz;
/*