kernel_optimize_test/kernel/bpf
Bui Quang Minh 613725436e bpf: Fix integer overflow in argument calculation for bpf_map_area_alloc
commit 7dd5d437c258bbf4cc15b35229e5208b87b8b4e0 upstream.

In 32-bit architecture, the result of sizeof() is a 32-bit integer so
the expression becomes the multiplication between 2 32-bit integer which
can potentially leads to integer overflow. As a result,
bpf_map_area_alloc() allocates less memory than needed.

Fix this by casting 1 operand to u64.

Fixes: 0d2c4f964050 ("bpf: Eliminate rlimit-based memory accounting for sockmap and sockhash maps")
Fixes: 99c51064fb ("devmap: Use bpf_map_area_alloc() for allocating hash buckets")
Fixes: 546ac1ffb7 ("bpf: add devmap, a map for storing net device references")
Signed-off-by: Bui Quang Minh <minhquangbui99@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20210613143440.71975-1-minhquangbui99@gmail.com
Signed-off-by: Connor O'Brien <connoro@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-17 10:14:41 +01:00
..
preload bpf: Fix umd memory leak in copy_process() 2021-03-30 14:32:03 +02:00
arraymap.c bpf: Fix potential race in tail call compatibility check 2021-11-02 19:48:21 +01:00
bpf_inode_storage.c bpf: Change inode_storage's lookup_elem return value from NULL to -EBADF 2021-03-30 14:31:56 +02:00
bpf_iter.c bpf: Fix an unitialized value in bpf_iter 2021-03-04 11:37:33 +01:00
bpf_local_storage.c bpf: Use hlist_add_head_rcu when linking to local_storage 2020-09-19 01:12:35 +02:00
bpf_lru_list.c bpf_lru_list: Read double-checked variable once without lock 2021-03-04 11:37:29 +01:00
bpf_lru_list.h bpf: Fix a typo "inacitve" -> "inactive" 2020-04-06 21:54:10 +02:00
bpf_lsm.c bpf: Update verification logic for LSM programs 2020-11-06 13:15:21 -08:00
bpf_struct_ops_types.h bpf: tcp: Support tcp_congestion_ops in bpf 2020-01-09 08:46:18 -08:00
bpf_struct_ops.c bpf: Handle return value of BPF_PROG_TYPE_STRUCT_OPS prog 2021-10-06 15:55:50 +02:00
btf.c bpf: Forbid trampoline attach for functions with variable arguments 2021-06-16 12:01:35 +02:00
cgroup.c bpf, cgroup: Fix problematic bounds check 2021-02-10 09:29:12 +01:00
core.c bpf: Prevent increasing bpf_jit_limit above max 2021-11-18 14:03:42 +01:00
cpumap.c bpf, cpumap: Remove rcpu pointer from cpu_map_build_skb signature 2020-09-28 23:30:42 +02:00
devmap.c bpf: Fix integer overflow in argument calculation for bpf_map_area_alloc 2021-12-17 10:14:41 +01:00
disasm.c bpf: Introduce BPF nospec instruction for mitigating Spectre v4 2021-08-04 12:46:44 +02:00
disasm.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 295 2019-06-05 17:36:38 +02:00
dispatcher.c bpf: Remove bpf_image tree 2020-03-13 12:49:52 -07:00
hashtab.c bpf: Fix integer overflow involving bucket_size 2021-08-18 08:59:10 +02:00
helpers.c bpf: Fix potentially incorrect results with bpf_get_local_storage() 2021-09-03 10:09:31 +02:00
inode.c bpf: link: Refuse non-O_RDWR flags in BPF_OBJ_GET 2021-04-14 08:42:00 +02:00
local_storage.c bpf: Fix NULL pointer dereference in bpf_get_local_storage() helper 2021-09-03 10:09:21 +02:00
lpm_trie.c bpf: Add map_meta_equal map ops 2020-08-28 15:41:30 +02:00
Makefile bpf: Don't rely on GCC __attribute__((optimize)) to disable GCSE 2020-10-29 20:01:46 -07:00
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 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: Add map_meta_equal map ops 2020-08-28 15:41:30 +02:00
reuseport_array.c bpf, net: Rework cookie generator as per-cpu one 2020-09-30 11:50:35 -07:00
ringbuf.c bpf: Fix false positive kmemleak report in bpf_ringbuf_area_alloc() 2021-07-19 09:44:54 +02:00
stackmap.c bpf: Fix integer overflow in prealloc_elems_and_freelist() 2021-10-13 10:04:26 +02:00
syscall.c bpf: Fix toctou on read-only map's constant scalar tracking 2021-12-01 09:18:58 +01:00
sysfs_btf.c bpf: Fix sysfs export of empty BTF section 2020-09-21 21:50:24 +02:00
task_iter.c bpf: Save correct stopping point in file seq iteration 2021-01-19 18:27:28 +01:00
tnum.c bpf: Verifier, do explicit ALU32 bounds tracking 2020-03-30 14:59:53 -07:00
trampoline.c bpf: Fix fexit trampoline. 2021-04-07 15:00:03 +02:00
verifier.c bpf: Fix the off-by-two error in range markings 2021-12-14 11:32:36 +01:00