In the Linux kernel, the following vulnerability has been resolved:
bpf: Add oversize check before call kvcalloc()
Commit 7661809d493b ("mm: don't allow oversized kvmalloc() calls") add the oversize check. When the allocation is larger than what kmalloc() supports, the following warning triggered:
WARNING: CPU: 0 PID: 8408 at mm/util.c:597 kvmallocnode+0x108/0x110 mm/util.c:597 Modules linked in: CPU: 0 PID: 8408 Comm: syz-executor221 Not tainted 5.14.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:kvmallocnode+0x108/0x110 mm/util.c:597 Call Trace: kvmalloc include/linux/mm.h:806 [inline] kvmallocarray include/linux/mm.h:824 [inline] kvcalloc include/linux/mm.h:829 [inline] checkbtfline kernel/bpf/verifier.c:9925 [inline] checkbtfinfo kernel/bpf/verifier.c:10049 [inline] bpfcheck+0xd634/0x150d0 kernel/bpf/verifier.c:13759 bpfprogload kernel/bpf/syscall.c:2301 [inline] _sysbpf+0x11181/0x126e0 kernel/bpf/syscall.c:4587 _dosysbpf kernel/bpf/syscall.c:4691 [inline] _sesysbpf kernel/bpf/syscall.c:4689 [inline] _x64sysbpf+0x78/0x90 kernel/bpf/syscall.c:4689 dosyscallx64 arch/x86/entry/common.c:50 [inline] dosyscall64+0x3d/0xb0 arch/x86/entry/common.c:80 entrySYSCALL64after_hwframe+0x44/0xae