Stanislav Fomichev 89357aa97b 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>

2023-01-18 11:41:37 +01:00

..

arraymap.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

2019-06-17 20:20:36 -07:00

bpf_lru_list.c

bpf_lru_list: Read double-checked variable once without lock

2021-03-04 10:26:16 +01:00

bpf_lru_list.h

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206

2019-05-30 11:29:53 -07:00

btf.c

bpf: Prevent decl_tag from being referenced in func_proto arg

2023-01-18 11:41:37 +01:00

cgroup.c

bpf, cgroup: Fix problematic bounds check

2021-02-10 09:25:27 +01:00

core.c

bpf: Make sure mac_header was set before using it

2022-07-29 17:14:16 +02:00

cpumap.c

cpumap: Avoid warning when CONFIG_DEBUG_PER_CPU_MAPS is enabled

2020-05-02 08:48:51 +02:00

devmap.c

bpf: Fix integer overflow in argument calculation for bpf_map_area_alloc

2021-12-17 10:12:24 +01:00

disasm.c

bpf: Introduce BPF nospec instruction for mitigating Spectre v4

2021-09-15 09:47:38 +02:00

disasm.h

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 295

2019-06-05 17:36:38 +02:00

hashtab.c

bpf: Zero-fill re-used per-cpu map element

2020-11-18 19:20:26 +01:00

helpers.c

bpf: Fix helper bpf_map_peek_elem_proto pointing to wrong callback

2021-01-23 15:57:56 +01:00

inode.c

bpf: Fix a rcu warning for bpffs map pretty-print

2020-10-01 13:18:19 +02:00

local_storage.c

bpf: move memory size checks to bpf_map_charge_init()

2019-05-31 16:52:56 -07:00

lpm_trie.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

2019-06-22 08:59:24 -04:00

Makefile

bpf: Don't rely on GCC __attribute__((optimize)) to disable GCSE

2020-11-18 19:20:26 +01:00

map_in_map.c

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206

2019-05-30 11:29:53 -07:00

map_in_map.h

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206

2019-05-30 11:29:53 -07:00

offload.c

bpf, offload: Replace bitwise AND by logical AND in bpf_prog_offload_info_fill

2020-02-28 17:22:27 +01:00

percpu_freelist.c

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206

2019-05-30 11:29:53 -07:00

percpu_freelist.h

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206

2019-05-30 11:29:53 -07:00

queue_stack_maps.c

bpf: move memory size checks to bpf_map_charge_init()

2019-05-31 16:52:56 -07:00

reuseport_array.c

bpf: move memory size checks to bpf_map_charge_init()

2019-05-31 16:52:56 -07:00

stackmap.c

bpf: Fix incorrect memory charge cost calculation in stack_map_alloc()

2022-06-22 14:11:02 +02:00

syscall.c

bpf: Ensure correct locking around vulnerable function find_vpid()

2022-10-26 13:22:24 +02:00

sysfs_btf.c

bpf: Fix sysfs export of empty BTF section

2020-10-14 10:32:58 +02:00

tnum.c

bpf: Fix incorrect verifier simulation of ARSH under ALU32

2020-01-23 08:22:44 +01:00

verifier.c

bpf: propagate precision in ALU/ALU64 operations

2023-01-18 11:41:02 +01:00

xskmap.c

bpf/xskmap: Return ERR_PTR for failure case instead of NULL.

2019-09-25 22:14:16 +02:00