Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf

Cross-merge bpf fixes after downstream PR.

In particular to bring the fix in
commit aa30eb3260b2 ("bpf: Force checkpoint when jmp history is too long").
The follow up verifier work depends on it.
And the fix in
commit 6801cf7890f2 ("selftests/bpf: Use -4095 as the bad address for bits iterator").
It's fixing instability of BPF CI on s390 arch.

No conflicts.

Adjacent changes in:
Auto-merging arch/Kconfig
Auto-merging kernel/bpf/helpers.c
Auto-merging kernel/bpf/memalloc.c
Auto-merging kernel/bpf/verifier.c
Auto-merging mm/slab_common.c

Signed-off-by: Alexei Starovoitov <ast@kernel.org>

1 files changed, 13 insertions, 1 deletions

diff --git a/kernel/bpf/memalloc.c b/kernel/bpf/memalloc.c
index 1a1b4458114c..889374722d0a 100644
--- a/kernel/bpf/memalloc.c
+++ b/kernel/bpf/memalloc.c
@@ -35,6 +35,8 @@
  */
 #define LLIST_NODE_SZ sizeof(struct llist_node)
 
+#define BPF_MEM_ALLOC_SIZE_MAX 4096
+
 /* similar to kmalloc, but sizeof == 8 bucket is gone */
 static u8 size_index[24] __ro_after_init = {
 	3,	/* 8 */
@@ -65,7 +67,7 @@ static u8 size_index[24] __ro_after_init = {
 
 static int bpf_mem_cache_idx(size_t size)
 {
-	if (!size || size > 4096)
+	if (!size || size > BPF_MEM_ALLOC_SIZE_MAX)
 		return -1;
 
 	if (size <= 192)
@@ -1002,3 +1004,13 @@ void notrace *bpf_mem_cache_alloc_flags(struct bpf_mem_alloc *ma, gfp_t flags)
 
 	return !ret ? NULL : ret + LLIST_NODE_SZ;
 }
+
+int bpf_mem_alloc_check_size(bool percpu, size_t size)
+{
+	/* The size of percpu allocation doesn't have LLIST_NODE_SZ overhead */
+	if ((percpu && size > BPF_MEM_ALLOC_SIZE_MAX) ||
+	    (!percpu && size > BPF_MEM_ALLOC_SIZE_MAX - LLIST_NODE_SZ))
+		return -E2BIG;
+
+	return 0;
+}