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linux/kernel/bpf
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Stanislav Fomichev 2b41b7e9f3 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 23:11:18 +09:00
..
preload
bpf: iterators: Build and use lightweight bootstrap version of bpftool
2022-07-15 12:01:30 -07:00
arraymap.c
bpf: return long from bpf_map_ops funcs
2023-05-11 23:11:09 +09:00
bloom_filter.c
bpf: return long from bpf_map_ops funcs
2023-05-11 23:11:09 +09:00
bpf_cgrp_storage.c
bpf: return long from bpf_map_ops funcs
2023-05-11 23:11:09 +09:00
bpf_inode_storage.c
bpf: return long from bpf_map_ops funcs
2023-05-11 23:11:09 +09:00
bpf_iter.c
bpf: Initialize the bpf_run_ctx in bpf_iter_run_prog()
2022-08-18 17:06:13 -07:00
bpf_local_storage.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2022-11-29 13:04:52 -08:00
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
printk: stop including cache.h from printk.h
2022-05-13 07:20:07 -07:00
bpf_lsm.c
bpf: Fix the kernel crash caused by bpf_setsockopt().
2023-01-26 23:26:40 -08:00
bpf_struct_ops_types.h
bpf: Add dummy BPF STRUCT_OPS for test purpose
2021-11-01 14:10:00 -07:00
bpf_struct_ops.c
bpf: return long from bpf_map_ops funcs
2023-05-11 23:11:09 +09:00
bpf_task_storage.c
bpf: return long from bpf_map_ops funcs
2023-05-11 23:11:09 +09:00
btf.c
bpf: Fix race between btf_put and btf_idr walk.
2023-05-11 23:11:18 +09:00
cgroup_iter.c
bpf: Pin the start cgroup in cgroup_iter_seq_init()
2022-11-21 17:40:42 +01:00
cgroup.c
bpf: Don't EFAULT for getsockopt with optval=NULL
2023-05-11 23:11:18 +09:00
core.c
bpf: Adjust insufficient default bpf_jit_limit
2023-03-30 12:51:19 +02:00
cpumap.c
bpf: return long from bpf_map_ops funcs
2023-05-11 23:11:09 +09:00
devmap.c
bpf: return long from bpf_map_ops funcs
2023-05-11 23:11:09 +09:00
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: Synchronize dispatcher update with bpf_dispatcher_xdp_func
2022-12-14 12:02:14 -08:00
hashtab.c
bpf: return long from bpf_map_ops funcs
2023-05-11 23:11:09 +09:00
helpers.c
bpf: Add bpf_rbtree_{add,remove,first} kfuncs
2023-05-11 23:11:11 +09:00
inode.c
bpf: Convert bpf_preload.ko to use light skeleton.
2022-02-10 23:31:51 +01:00
Kconfig
rcu: Make the TASKS_RCU Kconfig option be selected
2022-04-20 16:52:58 -07:00
link_iter.c
bpf: Add bpf_link iterator
2022-05-10 11:20:45 -07:00
local_storage.c
bpf: return long from bpf_map_ops funcs
2023-05-11 23:11:09 +09:00
lpm_trie.c
bpf: return long from bpf_map_ops funcs
2023-05-11 23:11:09 +09:00
Makefile
bpf: Implement cgroup storage available to non-cgroup-attached bpf progs
2022-10-25 23:19:19 -07:00
map_in_map.c
bpf: Add comments for map BTF matching requirement for bpf_list_head
2022-11-17 19:22:14 -08:00
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
2021-12-18 13:27:41 -08:00
memalloc.c
bpf: Zeroing allocated object from slab in bpf memory allocator
2023-03-10 09:28:22 +01:00
mmap_unlock_work.h
bpf: Introduce helper bpf_find_vma
2021-11-07 11:54:51 -08:00
net_namespace.c
net: Add includes masked by netdevice.h including uapi/bpf.h
2021-12-29 20:03:05 -08:00
offload.c
bpf: restore the ebpf program ID for BPF_AUDIT_UNLOAD and PERF_BPF_EVENT_PROG_UNLOAD
2023-01-09 19:47:58 -08:00
percpu_freelist.c
bpf: Initialize same number of free nodes for each pcpu_freelist
2022-11-11 12:05:14 -08:00
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: return long from bpf_map_ops funcs
2023-05-11 23:11:09 +09:00
reuseport_array.c
bpf: return long from bpf_map_ops funcs
2023-05-11 23:11:09 +09:00
ringbuf.c
bpf: return long from bpf_map_ops funcs
2023-05-11 23:11:09 +09:00
stackmap.c
bpf: return long from bpf_map_ops funcs
2023-05-11 23:11:09 +09:00
syscall.c
bpf: Add basic bpf_rb_{root,node} support
2023-05-11 23:11:11 +09:00
sysfs_btf.c
bpf: Load and verify kernel module BTFs
2020-11-10 15:25:53 -08:00
task_iter.c
bpf: keep a reference to the mm, in case the task is dead.
2022-12-28 14:11:48 -08:00
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 panic due to wrong pageattr of im->image
2022-12-28 13:46:28 -08:00
verifier.c
bpf: Fix struct_meta lookup for bpf_obj_free_fields kfunc call
2023-05-11 23:11:12 +09:00