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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: Read double-checked variable once without lock
2021-02-10 15:54:26 -08:00
bpf_lru_list.h
bpf: Fix a typo "inacitve" -> "inactive"
2020-04-06 21:54:10 +02:00
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
bpf: Remove bpf_image tree
2020-03-13 12:49:52 -07:00
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
bpf: Enable task local storage for tracing programs
2021-02-26 11:51:47 -08:00
map_in_map.c
bpf: Remember BTF of inner maps.
2021-07-15 22:31:10 +02:00
map_in_map.h
bpf: Add map_meta_equal map ops
2020-08-28 15:41:30 +02:00
map_iter.c
bpf: Introduce MEM_RDONLY flag
2022-05-01 17:22:24 +02:00
net_namespace.c
bpf: Add support for forced LINK_DETACH command
2020-08-01 20:38:28 -07:00
offload.c
bpf, offload: Replace bitwise AND by logical AND in bpf_prog_offload_info_fill
2020-02-17 16:53:49 +01:00
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
bpf: Use raw_spin_trylock() for pcpu_freelist_push/pop in NMI
2020-10-06 00:04:11 +02:00
prog_iter.c
bpf: Refactor bpf_iter_reg to have separate seq_info member
2020-07-25 20:16:32 -07:00
queue_stack_maps.c
bpf: Eliminate rlimit-based memory accounting for queue_stack_maps maps
2020-12-02 18:32:46 -08:00
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
bpf: Load and verify kernel module BTFs
2020-11-10 15:25:53 -08:00
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