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linux/kernel/bpf
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Hou Tao 7bf4461f1c bpf: Check rcu_read_lock_trace_held() in bpf_map_lookup_percpu_elem() 
[ Upstream commit d4965578267e2e81f67c86e2608481e77e9c8569 ]

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
..
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
Merge tag 'net-next-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
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: Fix the kernel crash caused by bpf_setsockopt().
2023-01-26 23:26:40 -08:00
bpf_struct_ops_types.h
bpf: Add dummy BPF STRUCT_OPS for test purpose
2021-11-01 14:10:00 -07:00
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
bpf: Relicense disassembler as GPL-2.0-only OR BSD-2-Clause
2021-09-02 14:49:23 +02:00
dispatcher.c
bpf: Synchronize dispatcher update with bpf_dispatcher_xdp_func
2022-12-14 12:02:14 -08:00
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
bpf: Add bpf_link iterator
2022-05-10 11:20:45 -07:00
local_storage.c
Merge tag 'cgroup-for-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
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
bpf: Introduce helper bpf_find_vma
2021-11-07 11:54:51 -08:00
mprog.c
bpf: Handle bpf_mprog_query with NULL entry
2023-10-06 17:11:20 -07:00
net_namespace.c
net: Add includes masked by netdevice.h including uapi/bpf.h
2021-12-29 20:03:05 -08:00
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
bpf: Initialize same number of free nodes for each pcpu_freelist
2022-11-11 12:05:14 -08:00
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: 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
bpf: Load and verify kernel module BTFs
2020-11-10 15:25:53 -08:00
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
bpf, tnums: Provably sound, faster, and more precise algorithm for tnum_mul
2021-06-01 13:34:15 +02:00
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