Kumar Kartikeya Dwivedi d1a374a1ae bpf: Limit maximum modifier chain length in btf_check_type_tags ... On processing a module BTF of module built for an older kernel, we might sometimes find that some type points to itself forming a loop. If such a type is a modifier, btf_check_type_tags's while loop following modifier chain will be caught in an infinite loop. Fix this by defining a maximum chain length and bailing out if we spin any longer than that. Fixes: eb596b0905 ("bpf: Ensure type tags precede modifiers in BTF") Reported-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/20220615042151.2266537-1-memxor@gmail.com		2022-06-15 19:32:12 +02:00
..
preload	bpf: Remove redundant slash	2022-03-07 22:19:32 -08:00
arraymap.c	bpf: add bpf_map_lookup_percpu_elem for percpu map	2022-05-11 18:16:54 -07:00
bloom_filter.c	bpf: Compute map_btf_id during build time	2022-04-26 11:35:21 -07:00
bpf_inode_storage.c	bpf: Compute map_btf_id during build time	2022-04-26 11:35:21 -07:00
bpf_iter.c	bpf: Remove redundant assignment to meta.seq in __task_seq_show()	2022-04-11 21:14:34 +02:00
bpf_local_storage.c	bpf: Fix usage of trace RCU in local storage.	2022-04-19 17:55:45 -07:00
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, x86: Attach a cookie to fentry/fexit/fmod_ret/lsm.	2022-05-10 21:58:31 -07:00
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, x86: Generate trampolines from bpf_tramp_links	2022-05-10 17:50:40 -07:00
bpf_task_storage.c	bpf: Compute map_btf_id during build time	2022-04-26 11:35:21 -07:00
btf.c	bpf: Limit maximum modifier chain length in btf_check_type_tags	2022-06-15 19:32:12 +02:00
cgroup.c	bpf: Use bpf_prog_run_array_cg_flags everywhere	2022-04-25 17:03:57 -07:00
core.c	bpf: Fix probe read error in ___bpf_prog_run()	2022-05-28 01:09:18 +02:00
cpumap.c	bpf: Compute map_btf_id during build time	2022-04-26 11:35:21 -07:00
devmap.c	bpf: Compute map_btf_id during build time	2022-04-26 11:35:21 -07:00
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
hashtab.c	bpf: add bpf_map_lookup_percpu_elem for percpu map	2022-05-11 18:16:54 -07:00
helpers.c	bpf: Add dynptr data slices	2022-05-23 14:31:28 -07:00
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: Compute map_btf_id during build time	2022-04-26 11:35:21 -07:00
lpm_trie.c	bpf: Compute map_btf_id during build time	2022-04-26 11:35:21 -07:00
Makefile	bpf: Add bpf_link iterator	2022-05-10 11:20:45 -07:00
map_in_map.c	bpf: Allow storing unreferenced kptr in map	2022-04-25 17:31:35 -07:00
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
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
percpu_freelist.c	bpf: Use raw_spin_trylock() for pcpu_freelist_push/pop in NMI	2020-10-06 00:04:11 +02:00
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: Compute map_btf_id during build time	2022-04-26 11:35:21 -07:00
reuseport_array.c	bpf: Compute map_btf_id during build time	2022-04-26 11:35:21 -07:00
ringbuf.c	bpf: Dynptr support for ring buffers	2022-05-23 14:31:28 -07:00
stackmap.c	bpf: Compute map_btf_id during build time	2022-04-26 11:35:21 -07:00
syscall.c	bpf: refine kernel.unprivileged_bpf_disabled behaviour	2022-05-20 19:48:29 -07:00
sysfs_btf.c	bpf: Load and verify kernel module BTFs	2020-11-10 15:25:53 -08:00
task_iter.c	bpf: Remove redundant assignment to meta.seq in __task_seq_show()	2022-04-11 21:14:34 +02:00
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()	2022-05-11 21:24:20 -07:00
verifier.c	bpf: Add dynptr data slices	2022-05-23 14:31:28 -07:00