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Anton Protopopov 215a256bc8 bpf: Fix map permissions check
[ Upstream commit 1ea0f9120c ]

The map_lookup_and_delete_elem() function should check for both FMODE_CAN_WRITE
and FMODE_CAN_READ permissions because it returns a map element to user space.

Fixes: bd513cd08f ("bpf: add MAP_LOOKUP_AND_DELETE_ELEM syscall")
Signed-off-by: Anton Protopopov <a.s.protopopov@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20200527185700.14658-5-a.s.protopopov@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-06-22 09:31:11 +02:00
..
Makefile btf: expose BTF info through sysfs 2019-08-13 16:14:15 +02:00
arraymap.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-06-17 20:20:36 -07:00
bpf_lru_list.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206 2019-05-30 11:29:53 -07:00
bpf_lru_list.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206 2019-05-30 11:29:53 -07:00
btf.c bpf: Explicitly memset some bpf info structures declared on the stack 2020-04-02 15:11:01 +02:00
cgroup.c bpf: Initialize storage pointers to NULL to prevent freeing garbage pointer 2020-04-01 11:02:11 +02:00
core.c bpf: Fix use after free in subprog's jited symbol removal 2019-10-22 11:26:09 -07:00
cpumap.c cpumap: Avoid warning when CONFIG_DEBUG_PER_CPU_MAPS is enabled 2020-05-02 08:48:51 +02:00
devmap.c bpf, devmap: Pass lockdep expression to RCU lists 2020-02-11 04:35:29 -08:00
disasm.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 295 2019-06-05 17:36:38 +02:00
disasm.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 295 2019-06-05 17:36:38 +02:00
hashtab.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-06-17 20:20:36 -07:00
helpers.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 295 2019-06-05 17:36:38 +02:00
inode.c bpf: map_seq_next should always increase position index 2020-02-24 08:36:58 +01:00
local_storage.c bpf: move memory size checks to bpf_map_charge_init() 2019-05-31 16:52:56 -07:00
lpm_trie.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-06-22 08:59:24 -04:00
map_in_map.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206 2019-05-30 11:29:53 -07:00
map_in_map.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206 2019-05-30 11:29:53 -07:00
offload.c bpf, offload: Replace bitwise AND by logical AND in bpf_prog_offload_info_fill 2020-02-28 17:22:27 +01:00
percpu_freelist.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206 2019-05-30 11:29:53 -07:00
percpu_freelist.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206 2019-05-30 11:29:53 -07:00
queue_stack_maps.c bpf: move memory size checks to bpf_map_charge_init() 2019-05-31 16:52:56 -07:00
reuseport_array.c bpf: move memory size checks to bpf_map_charge_init() 2019-05-31 16:52:56 -07:00
stackmap.c bpf/stackmap: Fix deadlock with rq_lock in bpf_get_stack() 2019-12-31 16:44:09 +01:00
syscall.c bpf: Fix map permissions check 2020-06-22 09:31:11 +02:00
sysfs_btf.c bpf: Support llvm-objcopy for vmlinux BTF 2020-06-17 16:40:20 +02:00
tnum.c bpf: Fix incorrect verifier simulation of ARSH under ALU32 2020-01-23 08:22:44 +01:00
verifier.c bpf: Forbid XADD on spilled pointers for unprivileged users 2020-05-02 08:48:46 +02:00
xskmap.c bpf/xskmap: Return ERR_PTR for failure case instead of NULL. 2019-09-25 22:14:16 +02:00