If fp_old is NULL in bpf_prog_realloc, the program does an assertion and crashes. However, we can continue execution by returning NULL to the upper callers. The patch fixes this issue. Signed-off-by: Aditya Pakki <pakki001@xxxxxxx> --- kernel/bpf/core.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/kernel/bpf/core.c b/kernel/bpf/core.c index 49e32acad7d8..4b46654fb26b 100644 --- a/kernel/bpf/core.c +++ b/kernel/bpf/core.c @@ -222,7 +222,8 @@ struct bpf_prog *bpf_prog_realloc(struct bpf_prog *fp_old, unsigned int size, u32 pages, delta; int ret; - BUG_ON(fp_old == NULL); + if (!fp_old) + return NULL; size = round_up(size, PAGE_SIZE); pages = size / PAGE_SIZE; -- 2.20.1
