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2ed905c521
linux/kernel/bpf
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Thomas Gleixner 2ed905c521 bpf: Enforce preallocation for instrumentation programs on RT 
Aside of the general unsafety of run-time map allocation for
instrumentation type programs RT enabled kernels have another constraint:

The instrumentation programs are invoked with preemption disabled, but the
memory allocator spinlocks cannot be acquired in atomic context because
they are converted to 'sleeping' spinlocks on RT.

Therefore enforce map preallocation for these programs types when RT is
enabled.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200224145642.648784007@linutronix.de
2020-02-24 16:12:19 -08:00
..
arraymap.c bpf: Add lookup and update batch ops to arraymap 2020-01-15 14:00:35 -08:00
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 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206 2019-05-30 11:29:53 -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: Reuse log from btf_prase_vmlinux() in btf_struct_ops_init() 2020-01-29 16:40:54 +01:00
btf.c bpf: Make btf_check_func_type_match() static 2020-02-11 00:22:47 +01:00
cgroup.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-01-09 12:13:43 -08:00
core.c bpf: Add BPF_FUNC_jiffies64 2020-01-22 16:30:10 -08:00
cpumap.c xdp: Make cpumap flush_list common for all map instances 2019-12-19 21:09:43 -08:00
devmap.c bpf, xdp: Remove no longer required rcu_read_{un}lock() 2020-01-27 11:16:25 +01:00
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: Allow to resolve bpf trampoline and dispatcher in unwind 2020-01-25 07:12:40 -08:00
hashtab.c bpf: Fix a potential deadlock with bpf_map_do_batch 2020-02-19 16:01:25 -08:00
helpers.c bpf: Add BPF_FUNC_jiffies64 2020-01-22 16:30:10 -08:00
inode.c Merge branch 'merge.nfs-fs_parse.1' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2020-02-08 13:26:41 -08:00
local_storage.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2019-12-22 09:54:33 -08:00
lpm_trie.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-06-22 08:59:24 -04:00
Makefile bpf: Introduce BPF_PROG_TYPE_STRUCT_OPS 2020-01-09 08:46:18 -08:00
map_in_map.c bpf: Introduce BPF_MAP_TYPE_STRUCT_OPS 2020-01-09 08:46:18 -08:00
map_in_map.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206 2019-05-30 11:29:53 -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 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206 2019-05-30 11:29:53 -07:00
percpu_freelist.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206 2019-05-30 11:29:53 -07:00
queue_stack_maps.c bpf: move memory size checks to bpf_map_charge_init() 2019-05-31 16:52:56 -07:00
reuseport_array.c net: Generate reuseport group ID on group creation 2020-02-21 22:29:45 +01:00
stackmap.c Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-12-03 09:29:50 -08:00
syscall.c bpf: Introduce dynamic program extensions 2020-01-22 23:04:52 +01:00
sysfs_btf.c btf: fix return value check in btf_vmlinux_init() 2019-08-15 22:18:17 -07:00
tnum.c bpf: Fix incorrect verifier simulation of ARSH under ALU32 2020-01-15 13:39:59 -08:00
trampoline.c bpf: Allow to resolve bpf trampoline and dispatcher in unwind 2020-01-25 07:12:40 -08:00
verifier.c bpf: Enforce preallocation for instrumentation programs on RT 2020-02-24 16:12:19 -08:00
xskmap.c xsk: Make xskmap flush_list common for all map instances 2019-12-19 21:09:43 -08:00