diff options
Diffstat (limited to 'kernel/bpf/helpers.c')
| -rw-r--r-- | kernel/bpf/helpers.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/kernel/bpf/helpers.c b/kernel/bpf/helpers.c index 78e8f4de6750..2c8e1ee97b71 100644 --- a/kernel/bpf/helpers.c +++ b/kernel/bpf/helpers.c @@ -22,6 +22,7 @@ #include <linux/security.h> #include <linux/btf_ids.h> #include <linux/bpf_mem_alloc.h> +#include <linux/kasan.h> #include "../../lib/kstrtox.h" @@ -2483,6 +2484,11 @@ __bpf_kfunc void bpf_throw(u64 cookie) WARN_ON_ONCE(!ctx.aux->exception_boundary); WARN_ON_ONCE(!ctx.bp); WARN_ON_ONCE(!ctx.cnt); + /* Prevent KASAN false positives for CONFIG_KASAN_STACK by unpoisoning + * deeper stack depths than ctx.sp as we do not return from bpf_throw, + * which skips compiler generated instrumentation to do the same. + */ + kasan_unpoison_task_stack_below((void *)ctx.sp); ctx.aux->bpf_exception_cb(cookie, ctx.sp, ctx.bp); } |