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linux/kernel/bpf
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Rik van Riel 01b7ded804 bpf: use kvzmalloc to allocate BPF verifier environment 
[ Upstream commit 434247637c ]

The kzmalloc call in bpf_check can fail when memory is very fragmented,
which in turn can lead to an OOM kill.

Use kvzmalloc to fall back to vmalloc when memory is too fragmented to
allocate an order 3 sized bpf verifier environment.

Admittedly this is not a very common case, and only happens on systems
where memory has already been squeezed close to the limit, but this does
not seem like much of a hot path, and it's a simple enough fix.

Signed-off-by: Rik van Riel <riel@surriel.com>
Reviewed-by: Shakeel Butt <shakeel.butt@linux.dev>
Link: https://lore.kernel.org/r/20241008170735.16766766@imladris.surriel.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2024-11-17 15:06:25 +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: Check percpu map value size first 2024-10-17 15:11:49 +02:00
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: Annotate data races in bpf_local_storage 2023-05-24 17:36:44 +01:00
bpf_lru_list.c bpf: Address KCSAN report on bpf_lru_list 2024-03-01 13:21:55 +01:00
bpf_lru_list.h bpf: Address KCSAN report on bpf_lru_list 2024-03-01 13:21:55 +01:00
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.c bpf: Handle return value of BPF_PROG_TYPE_STRUCT_OPS prog 2021-09-14 11:09:50 -07:00
bpf_struct_ops_types.h bpf: tcp: Support tcp_congestion_ops in bpf 2020-01-09 08:46:18 -08:00
bpf_task_storage.c bpf: Use this_cpu_{inc|dec|inc_return} for bpf_task_storage_busy 2022-10-26 12:34:41 +02:00
btf.c bpf: Eliminate remaining "make W=1" warnings in kernel/bpf/btf.o 2024-08-19 05:44:59 +02:00
cgroup.c bpf: Don't EFAULT for {g,s}setsockopt with wrong optlen 2023-07-23 13:46:49 +02:00
core.c bpf: Take return from set_memory_ro() into account with bpf_prog_lock_ro() 2024-07-05 09:14:42 +02:00
cpumap.c xdp: Move conversion to xdp_frame out of map functions 2024-05-17 11:50:47 +02:00
devmap.c bpf: devmap: provide rxq after redirect 2024-11-01 01:52:31 +01:00
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 bpf: Check percpu map value size first 2024-10-17 15:11:49 +02:00
helpers.c bpf: Fix bpf_strtol and bpf_strtoul helpers for 32bit 2024-10-17 15:10:58 +02:00
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: Fix out-of-bounds write in trie_get_next_key() 2024-11-08 16:25:53 +01:00
Makefile bpf: Enable task local storage for tracing programs 2021-02-26 11:51:47 -08:00
map_in_map.c bpf: Defer the free of inner map when necessary 2024-03-26 18:21:12 -04:00
map_in_map.h bpf: Add map and need_defer parameters to .map_fd_put_ptr() 2024-02-23 08:54:42 +01:00
map_iter.c bpf: Introduce MEM_RDONLY flag 2022-05-01 17:22:24 +02:00
net_namespace.c bpf: Add support for forced LINK_DETACH command 2020-08-01 20:38:28 -07:00
offload.c bpf: restore the ebpf program ID for BPF_AUDIT_UNLOAD and PERF_BPF_EVENT_PROG_UNLOAD 2023-01-24 07:22:46 +01:00
percpu_freelist.c bpf: Initialize same number of free nodes for each pcpu_freelist 2022-11-26 09:24:38 +01:00
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 2023-10-06 13:18:04 +02:00
reuseport_array.c bpf: Fix spelling mistakes 2021-05-24 21:13:05 -07:00
ringbuf.c bpf: Fix overrunning reservations in ringbuf 2024-07-27 10:46:06 +02:00
stackmap.c bpf: Fix stackmap overflow check on 32-bit arches 2024-03-26 18:21:22 -04:00
syscall.c bpf: Defer the free of inner map when necessary 2024-03-26 18:21:12 -04:00
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 x86/ibt,ftrace: Search for __fentry__ location 2024-07-05 09:14:12 +02:00
verifier.c bpf: use kvzmalloc to allocate BPF verifier environment 2024-11-17 15:06:25 +01:00