Kumar Kartikeya Dwivedi a5d8272752 bpf: Be conservative while processing invalid kfunc calls ... This patch also modifies the BPF verifier to only return error for invalid kfunc calls specially marked by userspace (with insn->imm == 0, insn->off == 0) after the verifier has eliminated dead instructions. This can be handled in the fixup stage, and skip processing during add and check stages. If such an invalid call is dropped, the fixup stage will not encounter insn->imm as 0, otherwise it bails out and returns an error. This will be exposed as weak ksym support in libbpf in later patches. Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20211002011757.311265-3-memxor@gmail.com		2021-10-05 17:07:41 -07:00
..
preload	libbpf: Make libbpf_version.h non-auto-generated	2021-09-13 15:36:47 -07:00
Kconfig	sock_map: Relax config dependency to CONFIG_NET	2021-07-15 18:17:49 -07:00
Makefile	bpf: Enable task local storage for tracing programs	2021-02-26 11:51:47 -08:00
arraymap.c	bpf: Replace callers of BPF_CAST_CALL with proper function typedef	2021-09-28 16:27:18 -07:00
bpf_inode_storage.c	bpf: Fix spelling mistakes	2021-05-24 21:13:05 -07:00
bpf_iter.c	bpf: Refactor BPF_PROG_RUN into a function	2021-08-17 00:45:07 +02:00
bpf_local_storage.c	bpf: Prevent deadlock from recursive bpf_task_storage_[get|delete]	2021-02-26 11:51:48 -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	bpf: Fix a typo "inacitve" -> "inactive"	2020-04-06 21:54:10 +02:00
bpf_lsm.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next	2021-06-17 11:54:56 -07:00
bpf_struct_ops.c	bpf: Handle return value of BPF_PROG_TYPE_STRUCT_OPS prog	2021-09-14 11:09:50 -07:00
bpf_struct_ops_types.h	bpf: tcp: Support tcp_congestion_ops in bpf	2020-01-09 08:46:18 -08:00
bpf_task_storage.c	bpf: Consolidate task_struct BTF_ID declarations	2021-08-25 10:37:05 -07:00
btf.c	bpf: Support for new btf kind BTF_KIND_TAG	2021-09-14 18:45:52 -07:00
cgroup.c	bpf: Migrate cgroup_bpf to internal cgroup_bpf_attach_type enum	2021-08-23 17:50:24 -07:00
core.c	bpf: Introduce BPF support for kernel module function calls	2021-10-05 17:07:41 -07:00
cpumap.c	bpf: cpumap: Implement generic cpumap	2021-07-07 20:01:45 -07:00
devmap.c	bpf, devmap: Exclude XDP broadcast to master device	2021-08-09 23:25:14 +02:00
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: Remove bpf_image tree	2020-03-13 12:49:52 -07:00
hashtab.c	bpf: Replace callers of BPF_CAST_CALL with proper function typedef	2021-09-28 16:27:18 -07:00
helpers.c	bpf: Replace callers of BPF_CAST_CALL with proper function typedef	2021-09-28 16:27:18 -07:00
inode.c	bpf: Fix regression on BPF_OBJ_GET with non-O_RDWR flags	2021-06-22 14:57:43 +02:00
local_storage.c	bpf: Increase supported cgroup storage value size	2021-07-27 15:59:29 -07:00
lpm_trie.c	bpf: Allow RCU-protected lookups to happen from bh context	2021-06-24 19:41:15 +02:00
map_in_map.c	bpf: Remember BTF of inner maps.	2021-07-15 22:31:10 +02:00
map_in_map.h	bpf: Add map_meta_equal map ops	2020-08-28 15:41:30 +02:00
map_iter.c	bpf: Implement link_query callbacks in map element iterators	2020-08-21 14:01:39 -07:00
net_namespace.c	bpf: Add support for forced LINK_DETACH command	2020-08-01 20:38:28 -07:00
offload.c	bpf, offload: Replace bitwise AND by logical AND in bpf_prog_offload_info_fill	2020-02-17 16:53:49 +01:00
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: Eliminate rlimit-based memory accounting for queue_stack_maps maps	2020-12-02 18:32:46 -08:00
reuseport_array.c	bpf: Fix spelling mistakes	2021-05-24 21:13:05 -07:00
ringbuf.c	bpf: Fix false positive kmemleak report in bpf_ringbuf_area_alloc()	2021-06-28 15:57:46 +02:00
stackmap.c	bpf, mm: Fix lockdep warning triggered by stack_map_get_build_id_offset()	2021-09-10 22:24:23 +02:00
syscall.c	bpf: Use kvmalloc for map keys in syscalls	2021-08-20 00:09:49 +02:00
sysfs_btf.c	bpf: Load and verify kernel module BTFs	2020-11-10 15:25:53 -08:00
task_iter.c	bpf: Consolidate task_struct BTF_ID declarations	2021-08-25 10:37:05 -07:00
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: Introduce helper bpf_get_branch_snapshot	2021-09-13 10:53:50 -07:00
verifier.c	bpf: Be conservative while processing invalid kfunc calls	2021-10-05 17:07:41 -07:00