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02b2705017
linux/kernel/bpf
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Jeongjun Park bb6705c3f9 bpf: add check for invalid name in btf_name_valid_section() 
If the length of the name string is 1 and the value of name[0] is NULL
byte, an OOB vulnerability occurs in btf_name_valid_section() and the
return value is true, so the invalid name passes the check.

To solve this, you need to check if the first position is NULL byte and
if the first character is printable.

Suggested-by: Eduard Zingerman <eddyz87@gmail.com>
Fixes: bd70a8fb7c ("bpf: Allow all printable characters in BTF DATASEC names")
Signed-off-by: Jeongjun Park <aha310510@gmail.com>
Link: https://lore.kernel.org/r/20240831054702.364455-1-aha310510@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Eduard Zingerman <eddyz87@gmail.com>
2024-09-04 11:56:34 -07:00
..
preload
arena.c bpf: Fix remap of arena. 2024-06-18 17:19:46 +02:00
arraymap.c bpf: Do not walk twice the map on free 2024-04-30 16:28:33 +02:00
bloom_filter.c bpf: Check bloom filter map value size 2024-03-27 09:56:17 -07:00
bpf_cgrp_storage.c bpf: Enable bpf_cgrp_storage for cgroup1 non-attach case 2023-12-08 17:08:18 -08:00
bpf_inode_storage.c
bpf_iter.c bpf: move sleepable flag from bpf_prog_aux to bpf_prog 2024-03-11 16:41:25 -07:00
bpf_local_storage.c bpf: fix order of args in call to bpf_map_kvcalloc 2024-07-10 15:31:19 -07:00
bpf_lru_list.c
bpf_lru_list.h bpf: lru: Remove unused declaration bpf_lru_promote() 2023-08-08 17:21:42 -07:00
bpf_lsm.c bpf: Add security_file_post_open() LSM hook to sleepable_lsm_hooks 2024-06-21 19:55:57 +02:00
bpf_struct_ops.c bpf: Use precise image size for struct_ops trampoline 2024-07-01 17:10:46 +02:00
bpf_task_storage.c
btf.c bpf: add check for invalid name in btf_name_valid_section() 2024-09-04 11:56:34 -07:00
cgroup_iter.c bpf: Let verifier consider {task,cgroup} is trusted in bpf_iter_reg 2023-11-07 15:24:25 -08:00
cgroup.c bpf: Allow helper bpf_get_[ns_]current_pid_tgid() for all prog types 2024-03-19 14:24:07 -07:00
core.c bpf-next-for-netdev 2024-07-09 17:01:46 +02:00
cpumap.c net: Move flush list retrieval to where it is used. 2024-07-02 15:26:57 +02:00
cpumask.c bpf: Allow invoking kfuncs from BPF_PROG_TYPE_SYSCALL progs 2024-04-05 10:56:09 -07:00
crypto.c bpf: crypto: make state and IV dynptr nullable 2024-06-13 16:33:04 -07:00
devmap.c bpf-next-for-netdev 2024-07-09 17:01:46 +02:00
disasm.c bpf: add special internal-only MOV instruction to resolve per-CPU addrs 2024-04-03 10:29:55 -07:00
disasm.h
dispatcher.c bpf: Use arch_bpf_trampoline_size 2023-12-06 17:17:20 -08:00
hashtab.c bpf: Do not walk twice the hash map on free 2024-04-30 16:28:46 +02:00
helpers.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2024-07-11 12:58:13 -07:00
inode.c bpf: Support symbolic BPF FS delegation mount options 2024-01-24 16:21:02 -08:00
Kconfig bpf: remove CONFIG_BPF_JIT dependency on CONFIG_MODULES of 2024-05-14 00:36:29 -07:00
link_iter.c
local_storage.c
log.c bpf: remove redeclaration of new_n in bpf_verifier_vlog 2024-06-20 19:50:26 -07:00
lpm_trie.c bpf: Avoid kfree_rcu() under lock in bpf_lpm_trie. 2024-03-29 11:10:41 -07:00
Makefile libbpf,bpf: Share BTF relocate-related code with kernel 2024-06-21 14:45:07 -07:00
map_in_map.c bpf: save extended inner map info for percpu array maps as well 2024-05-15 09:34:54 -07:00
map_in_map.h bpf: Add map and need_defer parameters to .map_fd_put_ptr() 2023-12-04 17:50:26 -08:00
map_iter.c bpf: treewide: Annotate BPF kfuncs in BTF 2024-01-31 20:40:56 -08:00
memalloc.c mm: remove CONFIG_MEMCG_KMEM 2024-07-10 12:14:54 -07:00
mmap_unlock_work.h
mprog.c bpf: Handle bpf_mprog_query with NULL entry 2023-10-06 17:11:20 -07:00
net_namespace.c
offload.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-09-21 21:49:45 +02:00
percpu_freelist.c
percpu_freelist.h
prog_iter.c
queue_stack_maps.c bpf: Avoid deadlock when using queue and stack maps from NMI 2023-09-11 19:04:49 -07:00
reuseport_array.c
ringbuf.c bpf: Fix overrunning reservations in ringbuf 2024-06-21 13:04:21 -07:00
stackmap.c bpf: Fix stackmap overflow check on 32-bit arches 2024-03-07 20:06:25 -08:00
syscall.c sysctl: treewide: constify the ctl_table argument of proc_handlers 2024-07-24 20:59:29 +02:00
sysfs_btf.c btf: Avoid weak external references 2024-04-16 16:35:13 +02:00
task_iter.c bpf: Remove unnecessary loop in task_file_seq_get_next() 2024-07-08 16:23:19 +02:00
tcx.c bpf, tcx: Get rid of tcx_link_const 2023-10-23 15:01:53 -07:00
tnum.c bpf: simplify tnum output if a fully known constant 2023-12-02 11:36:51 -08:00
token.c bpf,token: Use BIT_ULL() to convert the bit mask 2024-01-29 20:04:55 -08:00
trampoline.c Networking changes for 6.10. 2024-05-14 19:42:24 -07:00
verifier.c bpf: Fix a kernel verifier crash in stacksafe() 2024-08-12 18:09:48 -07:00