Hou Tao 7bf4461f1c bpf: Check rcu_read_lock_trace_held() in bpf_map_lookup_percpu_elem() ... [ Upstream commit d496557826 ] bpf_map_lookup_percpu_elem() helper is also available for sleepable bpf program. When BPF JIT is disabled or under 32-bit host, bpf_map_lookup_percpu_elem() will not be inlined. Using it in a sleepable bpf program will trigger the warning in bpf_map_lookup_percpu_elem(), because the bpf program only holds rcu_read_lock_trace lock. Therefore, add the missed check. Reported-by: syzbot+dce5aae19ae4d6399986@syzkaller.appspotmail.com Closes: https://lore.kernel.org/bpf/000000000000176a130617420310@google.com/ Signed-off-by: Hou Tao <houtao1@huawei.com> Link: https://lore.kernel.org/r/20250526062534.1105938-1-houtao@huaweicloud.com Signed-off-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2025-06-27 11:08:53 +01:00
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preload	bpf: make preloaded map iterators to display map elements count	2023-07-06 12:42:25 -07:00
arraymap.c	bpf: Check percpu map value size first	2024-10-17 15:24:15 +02:00
bloom_filter.c	bpf: Check bloom filter map value size	2024-05-17 12:02:11 +02:00
bpf_cgrp_storage.c	bpf: Only fails the busy counter check in bpf_cgrp_storage_get if it creates storage	2025-05-02 07:50:53 +02:00
bpf_inode_storage.c	Networking changes for 6.4.	2023-04-26 16:07:23 -07:00
bpf_iter.c	bpf: implement numbers iterator	2023-03-08 16:19:51 -08:00
bpf_local_storage.c	bpf: bpf_local_storage: Always use bpf_mem_alloc in PREEMPT_RT	2025-02-08 09:52:06 +01:00
bpf_lru_list.c	bpf: Address KCSAN report on bpf_lru_list	2023-05-12 12:01:03 -07:00
bpf_lru_list.h	bpf: lru: Remove unused declaration bpf_lru_promote()	2023-08-08 17:21:42 -07:00
bpf_lsm.c
bpf_struct_ops_types.h
bpf_struct_ops.c	bpf: Support default .validate() and .update() behavior for struct_ops links	2023-08-14 22:23:39 -07:00
bpf_task_storage.c	bpf: Teach verifier that certain helpers accept NULL pointer.	2023-04-04 16:57:16 -07:00
btf.c	bpf: Check size for BTF-based ctx access of pointer members	2024-12-19 18:11:25 +01:00
cgroup_iter.c	cgroup: bpf: use cgroup_lock()/cgroup_unlock() wrappers	2023-03-17 12:07:13 -10:00
cgroup.c	bpf: Allow pre-ordering for bpf cgroup progs	2025-06-04 14:41:58 +02:00
core.c	bpf: Avoid __bpf_prog_ret0_warn when jit fails	2025-06-19 15:28:18 +02:00
cpumap.c	bpf: report RCU QS in cpumap kthread	2024-03-26 18:20:12 -04:00
cpumask.c	bpf: Convert bpf_cpumask to bpf_mem_cache_free_rcu.	2023-07-12 23:45:23 +02:00
devmap.c	bpf: fix OOB devmap writes when deleting elements	2024-12-14 19:59:56 +01:00
disasm.c	bpf: change bpf_alu_sign_string and bpf_movsx_string to static	2023-08-04 16:15:50 -07:00
disasm.h
dispatcher.c
hashtab.c	bpf: fix possible endless loop in BPF map iteration	2025-06-04 14:41:53 +02:00
helpers.c	bpf: Check rcu_read_lock_trace_held() in bpf_map_lookup_percpu_elem()	2025-06-27 11:08:53 +01:00
inode.c	bpf: convert to ctime accessor functions	2023-07-24 10:30:07 +02:00
Kconfig	bpf: Add fd-based tcx multi-prog infra with link support	2023-07-19 10:07:27 -07:00
link_iter.c
local_storage.c	cgroup changes for v6.4-rc1	2023-04-29 10:05:22 -07:00
log.c	bpf: drop unnecessary user-triggerable WARN_ONCE in verifierl log	2023-05-16 22:34:50 -07:00
lpm_trie.c	bpf: Fix exact match conditions in trie_get_next_key()	2024-12-14 19:59:51 +01:00
Makefile	bpf: Add fd-based tcx multi-prog infra with link support	2023-07-19 10:07:27 -07:00
map_in_map.c	bpf: Optimize the free of inner map	2024-06-21 14:38:15 +02:00
map_in_map.h	bpf: Add map and need_defer parameters to .map_fd_put_ptr()	2024-01-25 15:35:22 -08:00
map_iter.c	bpf: allow any program to use the bpf_map_sum_elem_count kfunc	2023-07-19 09:48:53 -07:00
memalloc.c	bpf: Use c->unit_size to select target cache during free	2024-01-25 15:35:28 -08:00
mmap_unlock_work.h
mprog.c	bpf: Handle bpf_mprog_query with NULL entry	2023-10-06 17:11:20 -07:00
net_namespace.c
offload.c	bpf: Avoid dummy bpf_offload_netdev in __bpf_prog_dev_bound_init	2023-09-11 22:06:06 -07:00
percpu_freelist.c
percpu_freelist.h
prog_iter.c
queue_stack_maps.c	bpf: Avoid deadlock when using queue and stack maps from NMI	2023-09-11 19:04:49 -07:00
reuseport_array.c	bpf: Centralize permissions checks for all BPF map types	2023-06-19 14:04:04 +02:00
ringbuf.c	bpf: Use raw_spinlock_t in ringbuf	2025-03-22 12:50:37 -07:00
stackmap.c	bpf: Fix stackmap overflow check on 32-bit arches	2024-03-26 18:19:39 -04:00
syscall.c	bpf: Allow pre-ordering for bpf cgroup progs	2025-06-04 14:41:58 +02:00
sysfs_btf.c
task_iter.c	bpf: Fix iter/task tid filtering	2024-11-01 01:58:25 +01:00
tcx.c	bpf: Handle bpf_mprog_query with NULL entry	2023-10-06 17:11:20 -07:00
tnum.c
trampoline.c	bpf, x64: Fix tailcall infinite loop	2023-11-20 11:58:55 +01:00
verifier.c	bpf: don't do clean_live_states when state->loop_entry->branches > 0	2025-06-04 14:42:07 +02:00