diff options
| -rw-r--r-- | kernel/trace/bpf_trace.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c index 60e82c7b8122..a2efbdad434b 100644 --- a/kernel/trace/bpf_trace.c +++ b/kernel/trace/bpf_trace.c @@ -334,8 +334,11 @@ static void bpf_trace_copy_string(char *buf, void *unsafe_ptr, char fmt_ptype, switch (fmt_ptype) { case 's': #ifdef CONFIG_ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE - strncpy_from_unsafe(buf, unsafe_ptr, bufsz); - break; + if ((unsigned long)unsafe_ptr < TASK_SIZE) { + strncpy_from_user_nofault(buf, user_ptr, bufsz); + break; + } + fallthrough; #endif case 'k': strncpy_from_kernel_nofault(buf, unsafe_ptr, bufsz); |