Stanislav Fomichev 551a26668c bpf: Don't EFAULT for getsockopt with optval=NULL ... [ Upstream commit 00e74ae086 ] Some socket options do getsockopt with optval=NULL to estimate the size of the final buffer (which is returned via optlen). This breaks BPF getsockopt assumptions about permitted optval buffer size. Let's enforce these assumptions only when non-NULL optval is provided. Fixes: 0d01da6afc ("bpf: implement getsockopt and setsockopt hooks") Reported-by: Martin KaFai Lau <martin.lau@kernel.org> Signed-off-by: Stanislav Fomichev <sdf@google.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/ZD7Js4fj5YyI2oLd@google.com/T/#mb68daf700f87a9244a15d01d00c3f0e5b08f49f7 Link: https://lore.kernel.org/bpf/20230418225343.553806-2-sdf@google.com Signed-off-by: Sasha Levin <sashal@kernel.org>		2023-05-11 23:03:26 +09:00
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preload	…
Kconfig	…
Makefile	…
arraymap.c	…
bloom_filter.c	…
bpf_inode_storage.c	…
bpf_iter.c	…
bpf_local_storage.c	…
bpf_lru_list.c	…
bpf_lru_list.h	…
bpf_lsm.c	bpf: Fix the kernel crash caused by bpf_setsockopt().	2023-02-09 11:28:02 +01:00
bpf_struct_ops.c	…
bpf_struct_ops_types.h	…
bpf_task_storage.c	…
btf.c	bpf: Fix race between btf_put and btf_idr walk.	2023-05-11 23:03:26 +09:00
cgroup.c	bpf: Don't EFAULT for getsockopt with optval=NULL	2023-05-11 23:03:26 +09:00
cgroup_iter.c	…
core.c	bpf: Adjust insufficient default bpf_jit_limit	2023-03-30 12:49:08 +02:00
cpumap.c	…
devmap.c	…
disasm.c	…
disasm.h	…
dispatcher.c	…
hashtab.c	bpf: Zeroing allocated object from slab in bpf memory allocator	2023-03-10 09:33:06 +01:00
helpers.c	…
inode.c	…
link_iter.c	…
local_storage.c	…
lpm_trie.c	…
map_in_map.c	…
map_in_map.h	…
map_iter.c	…
memalloc.c	bpf: Zeroing allocated object from slab in bpf memory allocator	2023-03-10 09:33:06 +01:00
mmap_unlock_work.h	…
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	…
syscall.c	…
sysfs_btf.c	…
task_iter.c	…
tnum.c	…
trampoline.c	…
verifier.c	bpf: Fix __reg_bound_offset 64->32 var_off subreg propagation	2023-05-11 23:03:19 +09:00