Bixuan Cui 0e6491b559 bpf: Add oversize check before call kvcalloc() ... Commit 7661809d49 ("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 Reported-by: syzbot+f3e749d4c662818ae439@syzkaller.appspotmail.com Signed-off-by: Bixuan Cui <cuibixuan@huawei.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/20210911005557.45518-1-cuibixuan@huawei.com		2021-09-13 16:28:15 -07:00
..
preload	…
Kconfig	…
Makefile	…
arraymap.c	…
bpf_inode_storage.c	…
bpf_iter.c	…
bpf_local_storage.c	…
bpf_lru_list.c	…
bpf_lru_list.h	…
bpf_lsm.c	…
bpf_struct_ops.c	…
bpf_struct_ops_types.h	…
bpf_task_storage.c	…
btf.c	…
cgroup.c	…
core.c	…
cpumap.c	…
devmap.c	…
disasm.c	bpf: Relicense disassembler as GPL-2.0-only OR BSD-2-Clause	2021-09-02 14:49:23 +02:00
disasm.h	bpf: Relicense disassembler as GPL-2.0-only OR BSD-2-Clause	2021-09-02 14:49:23 +02:00
dispatcher.c	…
hashtab.c	…
helpers.c	…
inode.c	…
local_storage.c	…
lpm_trie.c	…
map_in_map.c	…
map_in_map.h	…
map_iter.c	…
net_namespace.c	…
offload.c	…
percpu_freelist.c	…
percpu_freelist.h	…
prog_iter.c	…
queue_stack_maps.c	…
reuseport_array.c	…
ringbuf.c	…
stackmap.c	bpf, mm: Fix lockdep warning triggered by stack_map_get_build_id_offset()	2021-09-10 22:24:23 +02:00
syscall.c	…
sysfs_btf.c	…
task_iter.c	…
tnum.c	…
trampoline.c	…
verifier.c	bpf: Add oversize check before call kvcalloc()	2021-09-13 16:28:15 -07:00