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Andrii Nakryiko 8fa4ecd49b bpf: enforce exact retval range on subprog/callback exit 
Instead of relying on potentially imprecise tnum representation of
expected return value range for callbacks and subprogs, validate that
smin/smax range satisfy exact expected range of return values.

E.g., if callback would need to return [0, 2] range, tnum can't
represent this precisely and instead will allow [0, 3] range. By
checking smin/smax range, we can make sure that subprog/callback indeed
returns only valid [0, 2] range.

Acked-by: Eduard Zingerman <eddyz87@gmail.com>
Acked-by: Shung-Hsi Yu <shung-hsi.yu@suse.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/r/20231202175705.885270-5-andrii@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2023-12-02 11:36:50 -08:00
..
preload
bpf: make preloaded map iterators to display map elements count
2023-07-06 12:42:25 -07:00
arraymap.c
bpf: return long from bpf_map_ops funcs
2023-03-22 15:11:30 -07:00
bloom_filter.c
bpf: Centralize permissions checks for all BPF map types
2023-06-19 14:04:04 +02:00
bpf_cgrp_storage.c
bpf: Teach verifier that certain helpers accept NULL pointer.
2023-04-04 16:57:16 -07:00
bpf_inode_storage.c
Networking changes for 6.4.
2023-04-26 16:07:23 -07:00
bpf_iter.c
bpf: Add __bpf_kfunc_{start,end}_defs macros
2023-11-01 22:33:53 -07:00
bpf_local_storage.c
bpf: bpf_sk_storage: Fix the missing uncharge in sk_omem_alloc
2023-09-06 11:08:14 +02:00
bpf_lru_list.c
bpf: Address KCSAN report on bpf_lru_list
2023-05-12 12:01:03 -07:00
bpf_lru_list.h
bpf: lru: Remove unused declaration bpf_lru_promote()
2023-08-08 17:21:42 -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: Charge modmem for struct_ops trampoline
2023-09-14 15:30:45 -07:00
bpf_task_storage.c
bpf: Teach verifier that certain helpers accept NULL pointer.
2023-04-04 16:57:16 -07:00
btf.c
bpf: Move GRAPH_{ROOT,NODE}_MASK macros into btf_field_type enum
2023-11-09 19:07:51 -08:00
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
for-6.7/io_uring-sockopt-2023-10-30
2023-11-01 11:16:34 -10:00
core.c
bpf: Do not allocate percpu memory at init stage
2023-11-15 07:51:06 -08:00
cpumap.c
net, bpf: Add a warning if NAPI cb missed xdp_do_flush().
2023-10-17 15:02:03 +02:00
cpumask.c
bpf: Add __bpf_kfunc_{start,end}_defs macros
2023-11-01 22:33:53 -07:00
devmap.c
net, bpf: Add a warning if NAPI cb missed xdp_do_flush().
2023-10-17 15:02:03 +02:00
disasm.c
bpf: change bpf_alu_sign_string and bpf_movsx_string to static
2023-08-04 16:15:50 -07:00
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: Fix unnecessary -EBUSY from htab_lock_bucket
2023-10-24 14:25:55 +02:00
helpers.c
bpf: Add a new kfunc for cgroup1 hierarchy
2023-11-14 08:56:56 -08:00
inode.c
bpf: convert to new timestamp accessors
2023-10-18 14:08:30 +02:00
Kconfig
bpf: Add fd-based tcx multi-prog infra with link support
2023-07-19 10:07:27 -07:00
link_iter.c
bpf: Add bpf_link iterator
2022-05-10 11:20:45 -07:00
local_storage.c
cgroup changes for v6.4-rc1
2023-04-29 10:05:22 -07:00
log.c
bpf: emit frameno for PTR_TO_STACK regs if it differs from current one
2023-11-18 11:39:59 -08:00
lpm_trie.c
bpf, lpm: Fix check prefixlen before walking trie
2023-11-09 19:07:38 -08:00
Makefile
bpf: Add fd-based tcx multi-prog infra with link support
2023-07-19 10:07:27 -07:00
map_in_map.c
bpf: Fix elem_size not being set for inner maps
2023-06-02 16:22:12 -07:00
map_in_map.h
…
map_iter.c
bpf: Add __bpf_kfunc_{start,end}_defs macros
2023-11-01 22:33:53 -07:00
memalloc.c
bpf: Add missed allocation hint for bpf_mem_cache_alloc_flags()
2023-11-26 18:00:26 -08:00
mmap_unlock_work.h
bpf: Introduce helper bpf_find_vma
2021-11-07 11:54:51 -08:00
mprog.c
bpf: Handle bpf_mprog_query with NULL entry
2023-10-06 17:11:20 -07:00
net_namespace.c
net: Add includes masked by netdevice.h including uapi/bpf.h
2021-12-29 20:03:05 -08:00
offload.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2023-09-21 21:49:45 +02:00
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
…
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
bpf: Centralize permissions checks for all BPF map types
2023-06-19 14:04:04 +02:00
ringbuf.c
bpf: Fold smp_mb__before_atomic() into atomic_set_release()
2023-10-24 14:26:07 +02:00
stackmap.c
bpf: Add crosstask check to __bpf_get_stack
2023-11-10 11:06:10 -08:00
syscall.c
bpf: rename BPF_F_TEST_SANITY_STRICT to BPF_F_TEST_REG_INVARIANTS
2023-11-17 10:30:02 -08:00
sysfs_btf.c
…
task_iter.c
bpf: bpf_iter_task_next: use next_task(kit->task) rather than next_task(kit->pos)
2023-11-19 11:43:44 -08:00
tcx.c
bpf, tcx: Get rid of tcx_link_const
2023-10-23 15:01:53 -07:00
tnum.c
bpf: generalize reg_set_min_max() to handle non-const register comparisons
2023-11-15 12:03:41 -08:00
trampoline.c
bpf, x64: Fix tailcall infinite loop
2023-09-12 13:06:12 -07:00
verifier.c
bpf: enforce exact retval range on subprog/callback exit
2023-12-02 11:36:50 -08:00