CVE-2021-47376

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
kvmalloc_node+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:kvmalloc_node+0x108/0x110 mm/util.c:597 Call Trace: kvmalloc
include/linux/mm.h:806 [inline] kvmalloc_array include/linux/mm.h:824
[inline] kvcalloc include/linux/mm.h:829 [inline] check_btf_line
kernel/bpf/verifier.c:9925 [inline] check_btf_info
kernel/bpf/verifier.c:10049 [inline] bpf_check+0xd634/0x150d0
kernel/bpf/verifier.c:13759 bpf_prog_load kernel/bpf/syscall.c:2301
[inline] __sys_bpf+0x11181/0x126e0 kernel/bpf/syscall.c:4587 __do_sys_bpf
kernel/bpf/syscall.c:4691 [inline] __se_sys_bpf kernel/bpf/syscall.c:4689
[inline] __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:4689 do_syscall_x64
arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0
arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae