Dave Marchevsky 738c96d5e2
bpf: Allow local kptrs to be exchanged via bpf_kptr_xchg ...
The previous patch added necessary plumbing for verifier and runtime to
know what to do with non-kernel PTR_TO_BTF_IDs in map values, but didn't
provide any way to get such local kptrs into a map value. This patch
modifies verifier handling of bpf_kptr_xchg to allow MEM_ALLOC kptr
types.
check_reg_type is modified accept MEM_ALLOC-flagged input to
bpf_kptr_xchg despite such types not being in btf_ptr_types. This could
have been done with a MAYBE_MEM_ALLOC equivalent to MAYBE_NULL, but
bpf_kptr_xchg is the only helper that I can forsee using
MAYBE_MEM_ALLOC, so keep it special-cased for now.
The verifier tags bpf_kptr_xchg retval MEM_ALLOC if and only if the BTF
associated with the retval is not kernel BTF.
Signed-off-by: Dave Marchevsky <davemarchevsky@fb.com >
Link: https://lore.kernel.org/r/20230310230743.2320707-3-davemarchevsky@fb.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org >
2023-03-10 16:38:05 -08:00
2023-03-10 16:38:05 -08:00
2023-02-21 18:24:12 -08:00
2022-12-01 00:09:20 +01:00
2022-12-02 11:25:00 +01:00
2023-02-22 06:44:48 -08:00
2022-10-03 14:03:25 -07:00
2023-02-24 12:47:33 -08:00
2023-01-01 11:15:05 -08:00
2022-12-21 14:31:52 -08:00
2023-02-24 14:34:12 -08:00
2023-01-02 08:59:33 -08:00
2023-02-23 14:00:10 -08:00
2023-02-21 10:45:51 -08:00
2023-02-23 14:05:08 -08:00
2023-02-15 20:06:26 +01:00
2023-02-23 13:49:45 -08:00
2023-02-02 16:40:07 -08:00
2023-02-23 17:09:35 -08:00
2023-02-21 09:45:13 -08:00
2023-03-06 20:36:39 -08:00
2022-11-30 16:13:18 -08:00
2022-02-03 11:20:34 -08:00
2022-08-22 18:50:06 -04:00
2022-04-25 14:37:28 +02:00
2022-09-01 17:39:30 -04:00
2022-08-29 19:47:03 -04:00
2022-09-07 11:30:15 -04:00
2022-01-11 13:08:21 -08:00
2023-02-20 12:38:27 -08:00
2022-09-26 19:46:09 -07:00
2023-01-19 09:24:29 +01:00
2022-09-26 10:13:13 -07:00
2023-01-13 11:48:18 +01:00
2023-01-13 11:48:15 +01:00
2022-12-02 12:43:02 +01:00
2023-02-02 22:32:59 -08:00
2022-11-01 10:04:52 -07:00
2022-09-26 19:46:07 -07:00
2023-02-21 15:27:48 -08:00
2022-07-05 13:32:59 -07:00
2023-02-08 13:36:22 +01:00
2023-02-23 17:09:35 -08:00
2022-09-07 21:53:50 +02:00
2023-01-22 23:43:34 +09:00
2022-07-15 18:21:49 +00:00
2023-02-09 17:03:20 -08:00
2022-04-15 14:49:55 -07:00
2022-12-01 15:53:05 -08:00
2022-11-12 18:47:36 -08:00
2023-01-13 15:09:08 -08:00
2022-11-15 00:42:02 -08:00
2022-11-15 00:42:02 -08:00
2022-03-31 10:36:55 +02:00
2023-02-09 16:51:39 -08:00
2023-02-23 17:55:40 -08:00
2023-02-02 22:50:05 -08:00
2022-09-11 21:55:06 -07:00
2023-02-02 22:50:05 -08:00
2023-02-21 08:49:16 +09:00
2023-01-20 14:30:45 +01:00
2023-02-02 22:50:02 -08:00
2022-09-11 21:55:12 -07:00
2022-12-23 12:00:24 -08:00
2023-02-02 16:26:06 -08:00
2022-10-25 15:15:52 -07:00
2022-12-19 12:33:32 -06:00
2023-01-31 15:01:45 +01:00
2023-01-25 14:07:21 -08:00
2023-02-23 17:09:35 -08:00
2023-01-18 17:12:37 -08:00
2022-06-29 13:07:16 +02:00
2022-09-11 21:55:12 -07:00
2022-12-27 12:52:10 +01:00
2022-10-04 15:59:36 +02:00
2023-02-09 16:51:39 -08:00
2023-02-17 14:58:01 -08:00
2022-12-27 12:52:12 +01:00
2022-04-11 17:07:29 -07:00
2022-11-09 18:06:35 +00:00
2023-01-13 17:01:06 -08:00
2022-12-27 12:52:11 +01:00
2022-10-10 12:49:34 -07:00
2022-09-11 21:55:10 -07:00
2022-07-05 13:32:59 -07:00
2022-05-08 01:33:09 -07:00
2022-02-25 09:36:06 +01:00
2022-10-17 16:41:16 +02:00
2022-04-05 09:59:38 +02:00
2022-05-24 11:11:13 -07:00
2022-08-20 15:17:45 -07:00
2023-02-23 17:09:35 -08:00
2022-09-08 16:56:45 -07:00
2023-02-21 13:34:07 -08:00
2022-09-11 21:55:10 -07:00
2022-08-29 12:47:15 +01:00
2023-01-05 12:10:35 -08:00
2023-02-18 14:34:36 -05:00
2022-04-29 14:38:03 -07:00
2022-05-18 18:24:57 -05:00
2023-02-13 16:36:14 +01:00
2023-02-02 22:50:04 -08:00
2022-11-30 20:16:49 -04:00
2022-05-19 23:25:47 -04:00
2022-10-23 12:01:01 -07:00
2022-08-02 19:24:24 -07:00
2022-06-23 18:41:40 +02:00
2022-08-06 16:38:17 -07:00
2023-01-13 07:50:40 -10:00
738c96d5e2