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linux/kernel/bpf
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Hou Tao b293dcc473 bpf: Use VM_MAP instead of VM_ALLOC for ringbuf 
After commit 2fd3fb0be1d1 ("kasan, vmalloc: unpoison VM_ALLOC pages
after mapping"), non-VM_ALLOC mappings will be marked as accessible
in __get_vm_area_node() when KASAN is enabled. But now the flag for
ringbuf area is VM_ALLOC, so KASAN will complain out-of-bound access
after vmap() returns. Because the ringbuf area is created by mapping
allocated pages, so use VM_MAP instead.

After the change, info in /proc/vmallocinfo also changes from
  [start]-[end]   24576 ringbuf_map_alloc+0x171/0x290 vmalloc user
to
  [start]-[end]   24576 ringbuf_map_alloc+0x171/0x290 vmap user

Fixes: 457f44363a88 ("bpf: Implement BPF ring buffer and verifier support for it")
Reported-by: syzbot+5ad567a418794b9b5983@syzkaller.appspotmail.com
Signed-off-by: Hou Tao <houtao1@huawei.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20220202060158.6260-1-houtao1@huawei.com
2022-02-02 23:15:24 -08:00
..
preload
bpf/preload: Clean up .gitignore and "clean-files" target
2021-10-20 10:39:04 -07:00
arraymap.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2021-10-28 10:43:58 -07:00
bloom_filter.c
bpf: Add missing map_get_next_key method to bloom filter map.
2021-12-29 09:38:31 -08:00
bpf_inode_storage.c
bpf: Allow bpf_local_storage to be used by sleepable programs
2021-12-29 17:54:40 -08:00
bpf_iter.c
bpf: Add bpf_loop helper
2021-11-30 10:56:28 -08:00
bpf_local_storage.c
bpf: Allow bpf_local_storage to be used by sleepable programs
2021-12-29 17:54:40 -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
bpf: Fix renaming task_getsecid_subj->current_getsecid_subj.
2022-01-24 20:20:51 -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: Rename btf_member accessors.
2021-12-02 11:18:34 -08:00
bpf_task_storage.c
bpf: Allow bpf_local_storage to be used by sleepable programs
2021-12-29 17:54:40 -08:00
btf.c
bpf: Generalize check_ctx_reg for reuse with other types
2022-01-19 01:21:24 +01:00
cgroup.c
bpf: Add MEM_RDONLY for helper args that are pointers to rdonly mem.
2021-12-18 13:27:41 -08:00
core.c
bpf, docs: Prune all references to "internal BPF"
2021-11-30 10:52:11 -08:00
cpumap.c
xdp: Move conversion to xdp_frame out of map functions
2022-01-05 19:46:32 -08:00
devmap.c
xdp: Move conversion to xdp_frame out of map functions
2022-01-05 19:46:32 -08:00
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: Add MEM_RDONLY for helper args that are pointers to rdonly mem.
2021-12-18 13:27:41 -08:00
inode.c
bpf: Fix mount source show for bpffs
2022-01-11 10:48:17 +01:00
Kconfig
bpf: Disallow unprivileged bpf by default
2021-11-01 17:06:47 +01:00
local_storage.c
bpf: Use struct_size() helper
2021-12-21 15:35:48 -08:00
lpm_trie.c
bpf: Fix typo in a comment in bpf lpm_trie.
2021-12-30 18:42:34 -08:00
Makefile
bpf: Prepare relo_core.c for kernel duty.
2021-12-02 11:18:34 -08:00
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: 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
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: Use struct_size() helper
2021-12-21 15:35:48 -08:00
ringbuf.c
bpf: Use VM_MAP instead of VM_ALLOC for ringbuf
2022-02-02 23:15:24 -08:00
stackmap.c
bpf: Introduce btf_tracing_ids
2021-11-12 10:19:09 -08:00
syscall.c
bpf: Add MEM_RDONLY for helper args that are pointers to rdonly mem.
2021-12-18 13:27:41 -08:00
sysfs_btf.c
bpf: Load and verify kernel module BTFs
2020-11-10 15:25:53 -08:00
task_iter.c
bpf: Introduce btf_tracing_ids
2021-11-12 10:19:09 -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 possible race in inc_misses_counter
2022-01-25 17:50:03 -08:00
verifier.c
bpf: Fix ringbuf memory type confusion when passing to helpers
2022-01-19 01:21:46 +01:00