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linux/kernel/bpf
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Daniel Borkmann 5b029a32cf bpf: Fix ringbuf helper function compatibility 
Commit 457f44363a ("bpf: Implement BPF ring buffer and verifier support
for it") extended check_map_func_compatibility() by enforcing map -> helper
function match, but not helper -> map type match.

Due to this all of the bpf_ringbuf_*() helper functions could be used with
a wrong map type such as array or hash map, leading to invalid access due
to type confusion.

Also, both BPF_FUNC_ringbuf_{submit,discard} have ARG_PTR_TO_ALLOC_MEM as
argument and not a BPF map. Therefore, their check_map_func_compatibility()
presence is incorrect since it's only for map type checking.

Fixes: 457f44363a ("bpf: Implement BPF ring buffer and verifier support for it")
Reported-by: Ryota Shiga (Flatt Security)
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
2021-08-23 23:09:10 +02:00
..
preload libbpf: Move BPF_SEQ_PRINTF and BPF_SNPRINTF to bpf_helpers.h 2021-05-26 10:45:41 -07:00
arraymap.c bpf: Add batched ops support for percpu array 2021-04-28 01:17:45 +02:00
bpf_inode_storage.c bpf: Fix spelling mistakes 2021-05-24 21:13:05 -07:00
bpf_iter.c bpf: Prepare bpf syscall to be used from kernel and user space. 2021-05-19 00:33:40 +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: Fix fexit trampoline. 2021-03-18 00:22:51 +01:00
bpf_struct_ops_types.h
bpf_task_storage.c bpf: Make symbol 'bpf_task_storage_busy' static 2021-03-16 12:24:20 -07:00
btf.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next 2021-06-17 11:54:56 -07:00
cgroup.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next 2021-02-16 13:14:06 -08:00
core.c bpf, core: Fix kernel-doc notation 2021-08-10 13:09:28 +02:00
cpumap.c xdp: Add proper __rcu annotations to redirect map entries 2021-06-24 19:41:15 +02:00
devmap.c bpf, devmap: Convert remaining READ_ONCE() to rcu_dereference_check() 2021-07-01 09:28:38 +02:00
disasm.c bpf: Introduce BPF nospec instruction for mitigating Spectre v4 2021-07-29 00:20:56 +02:00
disasm.h
dispatcher.c bpf: Remove bpf_image tree 2020-03-13 12:49:52 -07:00
hashtab.c bpf: Fix integer overflow involving bucket_size 2021-08-07 01:39:22 +02:00
helpers.c bpf: Add rcu_read_lock in bpf_get_current_[ancestor_]cgroup_id() helpers 2021-08-11 11:45:43 -07:00
inode.c bpf: Fix regression on BPF_OBJ_GET with non-O_RDWR flags 2021-06-22 14:57:43 +02:00
Kconfig bpf: Fix BPF_JIT kconfig symbol dependency 2021-05-20 23:48:37 +02:00
local_storage.c bpf: Fix NULL pointer dereference in bpf_get_local_storage() helper 2021-03-25 18:31:36 -07:00
lpm_trie.c bpf: Allow RCU-protected lookups to happen from bh context 2021-06-24 19:41:15 +02:00
Makefile bpf: Enable task local storage for tracing programs 2021-02-26 11:51:47 -08:00
map_in_map.c bpf: Relax max_entries check for most of the inner map types 2020-08-28 15:41:30 +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
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: Refcount task stack in bpf_get_task_stack 2021-04-01 13:58:07 -07:00
syscall.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next 2021-06-17 11:54:56 -07:00
sysfs_btf.c bpf: Load and verify kernel module BTFs 2020-11-10 15:25:53 -08:00
task_iter.c bpf: Introduce task_vma bpf_iter 2021-02-12 12:56:53 -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 spelling mistakes 2021-05-24 21:13:05 -07:00
verifier.c bpf: Fix ringbuf helper function compatibility 2021-08-23 23:09:10 +02:00