mirror-linux/kernel/bpf
Kumar Kartikeya Dwivedi 4e7a81b5e7 bpf: Annotate data races in bpf_local_storage
[ Upstream commit 0a09a2f933 ]

There are a few cases where hlist_node is checked to be unhashed without
holding the lock protecting its modification. In this case, one must use
hlist_unhashed_lockless to avoid load tearing and KCSAN reports. Fix
this by using lockless variant in places not protected by the lock.

Since this is not prompted by any actual KCSAN reports but only from
code review, I have not included a fixes tag.

Cc: Martin KaFai Lau <martin.lau@kernel.org>
Cc: KP Singh <kpsingh@kernel.org>
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Link: https://lore.kernel.org/r/20230221200646.2500777-4-memxor@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-05-24 17:32:36 +01:00
..
preload bpf: iterators: Build and use lightweight bootstrap version of bpftool 2022-07-15 12:01:30 -07:00
Kconfig
Makefile bpf: Introduce any context BPF specific memory allocator. 2022-09-05 15:33:05 +02:00
arraymap.c bpf: Support kptrs in percpu arraymap 2022-09-07 11:46:08 -07:00
bloom_filter.c treewide: use get_random_u32() when possible 2022-10-11 17:42:58 -06:00
bpf_inode_storage.c
bpf_iter.c bpf: Initialize the bpf_run_ctx in bpf_iter_run_prog() 2022-08-18 17:06:13 -07:00
bpf_local_storage.c bpf: Annotate data races in bpf_local_storage 2023-05-24 17:32:36 +01:00
bpf_lru_list.c
bpf_lru_list.h
bpf_lsm.c bpf: Fix the kernel crash caused by bpf_setsockopt(). 2023-02-09 11:28:02 +01:00
bpf_struct_ops.c bpf: Remove is_valid_bpf_tramp_flags() 2022-07-11 21:04:58 +02:00
bpf_struct_ops_types.h
bpf_task_storage.c bpf: Use this_cpu_{inc|dec|inc_return} for bpf_task_storage_busy 2022-09-01 12:16:12 -07:00
btf.c bpf: Fix race between btf_put and btf_idr walk. 2023-05-11 23:03:26 +09:00
cgroup.c bpf: Don't EFAULT for getsockopt with optval=NULL 2023-05-11 23:03:26 +09:00
cgroup_iter.c bpf: Pin the start cgroup in cgroup_iter_seq_init() 2022-12-31 13:32:13 +01:00
core.c bpf: Adjust insufficient default bpf_jit_limit 2023-03-30 12:49:08 +02:00
cpumap.c bpf: Use bpf_map_area_alloc consistently on bpf map creation 2022-08-10 11:50:43 -07:00
devmap.c bpf: Use bpf_map_area_alloc consistently on bpf map creation 2022-08-10 11:50:43 -07:00
disasm.c
disasm.h
dispatcher.c bpf: Add explicit cast to 'void *' for __BPF_DISPATCHER_UPDATE() 2022-11-07 16:07:35 -08:00
hashtab.c bpf: Zeroing allocated object from slab in bpf memory allocator 2023-03-10 09:33:06 +01:00
helpers.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2022-10-03 17:44:18 -07:00
inode.c
link_iter.c
local_storage.c bpf: Use bpf_map_area_alloc consistently on bpf map creation 2022-08-10 11:50:43 -07:00
lpm_trie.c bpf: Use bpf_map_area_alloc consistently on bpf map creation 2022-08-10 11:50:43 -07:00
map_in_map.c
map_in_map.h
map_iter.c
memalloc.c bpf: Zeroing allocated object from slab in bpf memory allocator 2023-03-10 09:33:06 +01:00
mmap_unlock_work.h
net_namespace.c
offload.c bpf: restore the ebpf program ID for BPF_AUDIT_UNLOAD and PERF_BPF_EVENT_PROG_UNLOAD 2023-01-24 07:24:37 +01:00
percpu_freelist.c bpf: Initialize same number of free nodes for each pcpu_freelist 2022-11-11 12:05:14 -08:00
percpu_freelist.h
prog_iter.c
queue_stack_maps.c bpf: Remove unneeded memset in queue_stack_map creation 2022-08-10 11:48:22 -07:00
reuseport_array.c net: Fix suspicious RCU usage in bpf_sk_reuseport_detach() 2022-08-17 16:42:59 -07:00
ringbuf.c bpf: Add bpf_user_ringbuf_drain() helper 2022-09-21 16:24:58 -07:00
stackmap.c perf/bpf: Always use perf callchains if exist 2022-09-13 15:03:22 +02:00
syscall.c bpf: restore the ebpf program ID for BPF_AUDIT_UNLOAD and PERF_BPF_EVENT_PROG_UNLOAD 2023-01-24 07:24:37 +01:00
sysfs_btf.c
task_iter.c bpf: keep a reference to the mm, in case the task is dead. 2023-01-24 07:24:31 +01:00
tnum.c
trampoline.c bpf: Fix panic due to wrong pageattr of im->image 2023-01-12 12:02:45 +01:00
verifier.c bpf: Fix __reg_bound_offset 64->32 var_off subreg propagation 2023-05-11 23:03:19 +09:00