Dave Marchevsky d8939cb0a0 bpf: Loosen alloc obj test in verifier's reg_btf_record ... btf->struct_meta_tab is populated by btf_parse_struct_metas in btf.c. There, a BTF record is created for any type containing a spin_lock or any next-gen datastructure node/head. Currently, for non-MAP_VALUE types, reg_btf_record will only search for a record using struct_meta_tab if the reg->type exactly matches (PTR_TO_BTF_ID | MEM_ALLOC). This exact match is too strict: an "allocated obj" type - returned from bpf_obj_new - might pick up other flags while working its way through the program. Loosen the check to be exact for base_type and just use MEM_ALLOC mask for type_flag. This patch is marked Fixes as the original intent of reg_btf_record was unlikely to have been to fail finding btf_record for valid alloc obj types with additional flags, some of which (e.g. PTR_UNTRUSTED) are valid register type states for alloc obj independent of this series. However, I didn't find a specific broken repro case outside of this series' added functionality, so it's possible that nothing was triggering this logic error before. Signed-off-by: Dave Marchevsky <davemarchevsky@fb.com> cc: Kumar Kartikeya Dwivedi <memxor@gmail.com> Fixes: 4e814da0d5 ("bpf: Allow locking bpf_spin_lock in allocated objects") Link: https://lore.kernel.org/r/20221206231000.3180914-2-davemarchevsky@fb.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>		2022-12-06 18:40:25 -08:00
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bpf	bpf: Loosen alloc obj test in verifier's reg_btf_record	2022-12-06 18:40:25 -08:00
cgroup
configs
debug
dma
entry
events	Including fixes from bpf, can and wifi.	2022-11-29 09:52:10 -08:00
futex
gcov
irq
kcsan
livepatch
locking
module
power
printk
rcu
sched
time
trace	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2022-11-29 13:04:52 -08:00
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