Stanislav Fomichev b327c68ace bpf: Prevent decl_tag from being referenced in func_proto arg ...

[ Upstream commit f17472d4599697d701aa239b4c475a506bccfd19 ]

Syzkaller managed to hit another decl_tag issue:

  btf_func_proto_check kernel/bpf/btf.c:4506 [inline]
  btf_check_all_types kernel/bpf/btf.c:4734 [inline]
  btf_parse_type_sec+0x1175/0x1980 kernel/bpf/btf.c:4763
  btf_parse kernel/bpf/btf.c:5042 [inline]
  btf_new_fd+0x65a/0xb00 kernel/bpf/btf.c:6709
  bpf_btf_load+0x6f/0x90 kernel/bpf/syscall.c:4342
  __sys_bpf+0x50a/0x6c0 kernel/bpf/syscall.c:5034
  __do_sys_bpf kernel/bpf/syscall.c:5093 [inline]
  __se_sys_bpf kernel/bpf/syscall.c:5091 [inline]
  __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5091
  do_syscall_64+0x54/0x70 arch/x86/entry/common.c:48

This seems similar to commit ea68376c8bed ("bpf: prevent decl_tag from being
referenced in func_proto") but for the argument.

Reported-by: syzbot+8dd0551dda6020944c5d@syzkaller.appspotmail.com
Signed-off-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20221123035422.872531-2-sdf@google.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

2022-12-31 13:14:42 +01:00

..

preload

libbpf: Move BPF_SEQ_PRINTF and BPF_SNPRINTF to bpf_helpers.h

2021-05-26 10:45:41 -07:00

arraymap.c

bpf: Acquire map uref in .init_seq_private for array map iterator

2022-08-25 11:40:03 +02:00

bpf_inode_storage.c

bpf: Fix spelling mistakes

2021-05-24 21:13:05 -07:00

bpf_iter.c

bpf: Refactor BPF_PROG_RUN into a function

2021-08-17 00:45:07 +02:00

bpf_local_storage.c

bpf: Do not copy spin lock field from user in bpf_selem_alloc

2022-12-08 11:28:39 +01:00

bpf_lru_list.c

…

bpf_lru_list.h

…

bpf_lsm.c

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

2021-06-17 11:54:56 -07:00

bpf_struct_ops_types.h

…

bpf_struct_ops.c

bpf: Handle return value of BPF_PROG_TYPE_STRUCT_OPS prog

2021-09-14 11:09:50 -07:00

bpf_task_storage.c

bpf: Use this_cpu_{inc|dec|inc_return} for bpf_task_storage_busy

2022-10-26 12:34:41 +02:00

btf.c

bpf: Prevent decl_tag from being referenced in func_proto arg

2022-12-31 13:14:42 +01:00

cgroup.c

bpf, cgroup: Fix kernel BUG in purge_effective_progs

2022-09-08 12:28:01 +02:00

core.c

bpf: Make sure mac_header was set before using it

2022-07-29 17:25:24 +02:00

cpumap.c

bpf: cpumap: Implement generic cpumap

2021-07-07 20:01:45 -07:00

devmap.c

bpf, devmap: Exclude XDP broadcast to master device

2021-08-09 23:25:14 +02:00

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

bpf: Propagate error from htab_lock_bucket() to userspace

2022-10-26 12:34:40 +02:00

helpers.c

bpf: Add MEM_RDONLY for helper args that are pointers to rdonly mem.

2022-05-01 17:22:26 +02:00

inode.c

bpf: Fix mount source show for bpffs

2022-01-27 11:05:26 +01:00

Kconfig

sock_map: Relax config dependency to CONFIG_NET

2021-07-15 18:17:49 -07:00

local_storage.c

bpf: Increase supported cgroup storage value size

2021-07-27 15:59:29 -07:00

lpm_trie.c

bpf: Allow RCU-protected lookups to happen from bh context

2021-06-24 19:41:15 +02:00

Makefile

…

map_in_map.c

bpf: Remember BTF of inner maps.

2021-07-15 22:31:10 +02:00

map_in_map.h

…

map_iter.c

bpf: Introduce MEM_RDONLY flag

2022-05-01 17:22:24 +02:00

net_namespace.c

…

offload.c

…

percpu_freelist.c

bpf: Initialize same number of free nodes for each pcpu_freelist

2022-11-26 09:24:38 +01:00

percpu_freelist.h

…

prog_iter.c

…

queue_stack_maps.c

…

reuseport_array.c

bpf: Fix spelling mistakes

2021-05-24 21:13:05 -07:00

ringbuf.c

bpf: Add MEM_RDONLY for helper args that are pointers to rdonly mem.

2022-05-01 17:22:26 +02:00

stackmap.c

bpf: Fix excessive memory allocation in stack_map_alloc()

2022-06-06 08:43:42 +02:00

syscall.c

bpf: Ensure correct locking around vulnerable function find_vpid()

2022-10-26 12:34:44 +02:00

sysfs_btf.c

…

task_iter.c

bpf: Consolidate task_struct BTF_ID declarations

2021-08-25 10:37:05 -07:00

tnum.c

bpf, tnums: Provably sound, faster, and more precise algorithm for tnum_mul

2021-06-01 13:34:15 +02:00

trampoline.c

bpf: Fix potential array overflow in bpf_trampoline_get_progs()

2022-06-06 08:43:42 +02:00

verifier.c

bpf: Do not zero-extend kfunc return values

2022-12-31 13:14:18 +01:00