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| author | markj <markj@FreeBSD.org> | 2016-05-09 17:13:40 +0000 |
|---|---|---|
| committer | markj <markj@FreeBSD.org> | 2016-05-09 17:13:40 +0000 |
| commit | 1708fafa25d9413ab466d3670d803e2ebf885d45 (patch) | |
| tree | 8ead64b06c03b77a8bdfd090771aa207cf46c3e9 | |
| parent | 2a13823fd61a04edb43e6bd563bd4867606c76c3 (diff) | |
| download | FreeBSD-src-1708fafa25d9413ab466d3670d803e2ebf885d45.zip FreeBSD-src-1708fafa25d9413ab466d3670d803e2ebf885d45.tar.gz | |
MFC r298589:
Allow DOF sections with excessively long probe function components.
PR: 207735
| -rw-r--r-- | sys/cddl/contrib/opensolaris/uts/common/dtrace/dtrace.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/sys/cddl/contrib/opensolaris/uts/common/dtrace/dtrace.c b/sys/cddl/contrib/opensolaris/uts/common/dtrace/dtrace.c index 9266ffc..ed99c4b 100644 --- a/sys/cddl/contrib/opensolaris/uts/common/dtrace/dtrace.c +++ b/sys/cddl/contrib/opensolaris/uts/common/dtrace/dtrace.c @@ -9295,6 +9295,10 @@ dtrace_helper_provide_one(dof_helper_t *dhp, dof_sec_t *sec, pid_t pid) probe = (dof_probe_t *)(uintptr_t)(daddr + prb_sec->dofs_offset + i * prb_sec->dofs_entsize); + /* See the check in dtrace_helper_provider_validate(). */ + if (strlen(strtab + probe->dofpr_func) >= DTRACE_FUNCNAMELEN) + continue; + dhpb.dthpb_mod = dhp->dofhp_mod; dhpb.dthpb_func = strtab + probe->dofpr_func; dhpb.dthpb_name = strtab + probe->dofpr_name; @@ -15805,7 +15809,13 @@ dtrace_helper_provider_validate(dof_hdr_t *dof, dof_sec_t *sec) if (strlen(strtab + probe->dofpr_func) >= DTRACE_FUNCNAMELEN) { dtrace_dof_error(dof, "function name too long"); - return (-1); + /* + * Keep going if the function name is too long. + * Unlike provider and probe names, we cannot reasonably + * impose restrictions on function names, since they're + * a property of the code being instrumented. We will + * skip this probe in dtrace_helper_provide_one(). + */ } if (probe->dofpr_name >= str_sec->dofs_size || |
