Hou Tao 4e8074bb33 bpf: Check validity of link->type in bpf_link_show_fdinfo() ...

commit 8421d4c876 upstream.

If a newly-added link type doesn't invoke BPF_LINK_TYPE(), accessing
bpf_link_type_strs[link->type] may result in an out-of-bounds access.

To spot such missed invocations early in the future, checking the
validity of link->type in bpf_link_show_fdinfo() and emitting a warning
when such invocations are missed.

Signed-off-by: Hou Tao <houtao1@huawei.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20241024013558.1135167-3-houtao@huaweicloud.com
[ shung-hsi.yu: break up existing seq_printf() call since commit 68b04864ca
  ("bpf: Create links for BPF struct_ops maps.") is not present ]
Signed-off-by: Shung-Hsi Yu <shung-hsi.yu@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2025-01-02 10:30:53 +01:00

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preload

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arraymap.c

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bloom_filter.c

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bpf_inode_storage.c

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bpf_iter.c

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bpf_local_storage.c

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bpf_lru_list.c

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bpf_lru_list.h

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bpf_lsm.c

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bpf_struct_ops_types.h

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bpf_struct_ops.c

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bpf_task_storage.c

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btf.c

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cgroup_iter.c

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cgroup.c

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core.c

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cpumap.c

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devmap.c

bpf: fix OOB devmap writes when deleting elements

2024-12-14 19:54:35 +01:00

disasm.c

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disasm.h

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dispatcher.c

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hashtab.c

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helpers.c

bpf: Fix helper writes to read-only maps

2024-12-14 19:54:53 +01:00

inode.c

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Kconfig

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link_iter.c

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local_storage.c

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log.c

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lpm_trie.c

bpf: Fix exact match conditions in trie_get_next_key()

2024-12-14 19:54:31 +01:00

Makefile

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map_in_map.c

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map_in_map.h

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map_iter.c

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memalloc.c

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mmap_unlock_work.h

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net_namespace.c

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offload.c

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percpu_freelist.c

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percpu_freelist.h

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prog_iter.c

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queue_stack_maps.c

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reuseport_array.c

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ringbuf.c

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stackmap.c

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syscall.c

bpf: Check validity of link->type in bpf_link_show_fdinfo()

2025-01-02 10:30:53 +01:00

sysfs_btf.c

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task_iter.c

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tnum.c

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trampoline.c

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verifier.c

bpf: sync_linked_regs() must preserve subreg_def

2024-12-19 18:08:57 +01:00