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He Fengqing 07058fb18d bpf: Fix possible race in inc_misses_counter 
[ Upstream commit 0e3135d3bfa5dfb658145238d2bc723a8e30c3a3 ]

It seems inc_misses_counter() suffers from same issue fixed in
the commit d979617aa84d ("bpf: Fixes possible race in update_prog_stats()
for 32bit arches"):
As it can run while interrupts are enabled, it could
be re-entered and the u64_stats syncp could be mangled.

Fixes: 9ed9e9ba2337 ("bpf: Count the number of times recursion was prevented")
Signed-off-by: He Fengqing <hefengqing@huawei.com>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/r/20220122102936.1219518-1-hefengqing@huawei.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-03-08 19:12:40 +01:00
..
preload
libbpf: Move BPF_SEQ_PRINTF and BPF_SNPRINTF to bpf_helpers.h
2021-05-26 10:45:41 -07:00
arraymap.c
bpf: Fix potential race in tail call compatibility check
2021-10-26 12:37:28 -07:00
bpf_inode_storage.c
bpf: Fix spelling mistakes
2021-05-24 21:13:05 -07:00
bpf_iter.c
bpf: Refactor BPF_PROG_RUN into a function
2021-08-17 00:45:07 +02:00
bpf_local_storage.c
bpf: Prevent deadlock from recursive bpf_task_storage_[get|delete]
2021-02-26 11:51:48 -08:00
bpf_lru_list.c
bpf_lru_list: Read double-checked variable once without lock
2021-02-10 15:54:26 -08:00
bpf_lru_list.h
bpf: Fix a typo "inacitve" -> "inactive"
2020-04-06 21:54:10 +02:00
bpf_lsm.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next
2021-06-17 11:54:56 -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: Handle return value of BPF_PROG_TYPE_STRUCT_OPS prog
2021-09-14 11:09:50 -07:00
bpf_task_storage.c
bpf: Consolidate task_struct BTF_ID declarations
2021-08-25 10:37:05 -07:00
btf.c
bpf: Disallow BPF_LOG_KERNEL log level for bpf(BPF_BTF_LOAD)
2022-01-27 11:03:27 +01:00
cgroup.c
bpf: Forbid bpf_ktime_get_coarse_ns and bpf_timer_* in tracing progs
2021-11-25 09:49:07 +01:00
core.c
bpf: Fix potential race in tail call compatibility check
2021-10-26 12:37:28 -07:00
cpumap.c
bpf: cpumap: Implement generic cpumap
2021-07-07 20:01:45 -07:00
devmap.c
bpf, devmap: Exclude XDP broadcast to master device
2021-08-09 23:25:14 +02:00
disasm.c
bpf: Relicense disassembler as GPL-2.0-only OR BSD-2-Clause
2021-09-02 14:49:23 +02:00
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: Remove bpf_image tree
2020-03-13 12:49:52 -07:00
hashtab.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2021-08-13 06:41:22 -07:00
helpers.c
bpf: Forbid bpf_ktime_get_coarse_ns and bpf_timer_* in tracing progs
2021-11-25 09:49:07 +01:00
inode.c
bpf: Fix mount source show for bpffs
2022-01-27 11:05:26 +01:00
Kconfig
sock_map: Relax config dependency to CONFIG_NET
2021-07-15 18:17:49 -07:00
local_storage.c
bpf: Increase supported cgroup storage value size
2021-07-27 15:59:29 -07:00
lpm_trie.c
bpf: Allow RCU-protected lookups to happen from bh context
2021-06-24 19:41:15 +02:00
Makefile
bpf: Enable task local storage for tracing programs
2021-02-26 11:51:47 -08:00
map_in_map.c
bpf: Remember BTF of inner maps.
2021-07-15 22:31:10 +02:00
map_in_map.h
bpf: Add map_meta_equal map ops
2020-08-28 15:41:30 +02:00
map_iter.c
bpf: Implement link_query callbacks in map element iterators
2020-08-21 14:01:39 -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: Use raw_spin_trylock() for pcpu_freelist_push/pop in NMI
2020-10-06 00:04:11 +02:00
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: Eliminate rlimit-based memory accounting for queue_stack_maps maps
2020-12-02 18:32:46 -08:00
reuseport_array.c
bpf: Fix spelling mistakes
2021-05-24 21:13:05 -07:00
ringbuf.c
bpf: Use VM_MAP instead of VM_ALLOC for ringbuf
2022-02-08 18:34:11 +01:00
stackmap.c
bpf: Guard against accessing NULL pt_regs in bpf_get_task_stack()
2022-02-01 17:26:59 +01:00
syscall.c
bpf: Use u64_stats_t in struct bpf_prog_stats
2022-03-08 19:12:40 +01:00
sysfs_btf.c
bpf: Load and verify kernel module BTFs
2020-11-10 15:25:53 -08:00
task_iter.c
bpf: Consolidate task_struct BTF_ID declarations
2021-08-25 10:37:05 -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: Fix possible race in inc_misses_counter
2022-03-08 19:12:40 +01:00
verifier.c
bpf: Mark PTR_TO_FUNC register initially with zero offset
2022-01-27 11:05:26 +01:00