Yonghong Song b474959d5a bpf: Fix a buffer out-of-bound access when filling raw_tp link_info ... Commit f2e10bff16 ("bpf: Add support for BPF_OBJ_GET_INFO_BY_FD for bpf_link") added link query for raw_tp. One of fields in link_info is to fill a user buffer with tp_name. The Scurrent checking only declares "ulen && !ubuf" as invalid. So "!ulen && ubuf" will be valid. Later on, we do "copy_to_user(ubuf, tp_name, ulen - 1)" which may overwrite user memory incorrectly. This patch fixed the problem by disallowing "!ulen && ubuf" case as well. Fixes: f2e10bff16 ("bpf: Add support for BPF_OBJ_GET_INFO_BY_FD for bpf_link") Signed-off-by: Yonghong Song <yhs@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/20200821191054.714731-1-yhs@fb.com		2020-08-24 21:03:07 -07:00
..
arraymap.c	bpf: Implement bpf iterator for array maps	2020-07-25 20:16:33 -07:00
bpf_iter.c	bpf: Fix a rcu_sched stall issue with bpf task/task_file iterator	2020-08-18 17:36:23 -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	bpf: Fix a typo "inacitve" -> "inactive"	2020-04-06 21:54:10 +02:00
bpf_lsm.c	bpf: Use tracing helpers for lsm programs	2020-06-01 15:08:04 -07:00
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: Set map_btf_{name, id} for all map types	2020-06-22 22:22:58 +02:00
btf.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next	2020-08-03 18:27:40 -07:00
cgroup.c	bpf: Add support for forced LINK_DETACH command	2020-08-01 20:38:28 -07:00
core.c	bpf: Delete repeated words in comments	2020-08-07 18:57:24 +02:00
cpumap.c	bpf: cpumap: Fix possible rcpu kthread hung	2020-07-21 09:15:28 -07:00
devmap.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next	2020-07-04 17:48:34 -07:00
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
dispatcher.c	bpf: Remove bpf_image tree	2020-03-13 12:49:52 -07:00
hashtab.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next	2020-08-03 18:27:40 -07:00
helpers.c	bpf: Implement BPF ring buffer and verifier support for it	2020-06-01 14:38:22 -07:00
inode.c	bpf: Create file bpf iterator	2020-05-09 17:05:26 -07:00
local_storage.c	bpf/local_storage: Fix build without CONFIG_CGROUP	2020-07-25 20:16:36 -07:00
lpm_trie.c	bpf: Remove redundant synchronize_rcu.	2020-07-01 08:07:13 -07:00
Makefile	bpf: Add bpf_prog iterator	2020-07-25 20:16:32 -07:00
map_in_map.c	bpf: Implement CAP_BPF	2020-05-15 17:29:41 +02:00
map_in_map.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206	2019-05-30 11:29:53 -07:00
map_iter.c	bpf: Change uapi for bpf iterator map elements	2020-08-06 16:39:14 -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: Dont iterate over possible CPUs with interrupts disabled	2020-02-24 16:18:20 -08:00
percpu_freelist.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206	2019-05-30 11:29:53 -07:00
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: Remove redundant synchronize_rcu.	2020-07-01 08:07:13 -07:00
reuseport_array.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2020-07-11 00:46:00 -07:00
ringbuf.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2020-07-11 00:46:00 -07:00
stackmap.c	bpf: Iterate through all PT_NOTE sections when looking for build id	2020-08-12 18:14:49 -07:00
syscall.c	bpf: Fix a buffer out-of-bound access when filling raw_tp link_info	2020-08-24 21:03:07 -07:00
sysfs_btf.c	bpf: Support llvm-objcopy for vmlinux BTF	2020-03-19 12:32:38 +01:00
task_iter.c	bpf: Avoid visit same object multiple times	2020-08-18 17:36:23 -07:00
tnum.c	bpf: Verifier, do explicit ALU32 bounds tracking	2020-03-30 14:59:53 -07:00
trampoline.c	bpf: lsm: Implement attach, detach and execution	2020-03-30 01:34:00 +02:00
verifier.c	bpf: Delete repeated words in comments	2020-08-07 18:57:24 +02:00