Andrii Nakryiko eaf18febd6 bpf: preserve STACK_ZERO slots on partial reg spills ... Instead of always forcing STACK_ZERO slots to STACK_MISC, preserve it in situations where this is possible. E.g., when spilling register as 1/2/4-byte subslots on the stack, all the remaining bytes in the stack slot do not automatically become unknown. If we knew they contained zeroes, we can preserve those STACK_ZERO markers. Add a helper mark_stack_slot_misc(), similar to scrub_spilled_slot(), but that doesn't overwrite either STACK_INVALID nor STACK_ZERO. Note that we need to take into account possibility of being in unprivileged mode, in which case STACK_INVALID is forced to STACK_MISC for correctness, as treating STACK_INVALID as equivalent STACK_MISC is only enabled in privileged mode. Acked-by: Eduard Zingerman <eddyz87@gmail.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/r/20231205184248.1502704-5-andrii@kernel.org Signed-off-by: Alexei Starovoitov <ast@kernel.org>		2023-12-05 13:40:20 -08:00
..
preload	bpf: make preloaded map iterators to display map elements count	2023-07-06 12:42:25 -07:00
arraymap.c	bpf: Set need_defer as false when clearing fd array during map free	2023-12-04 17:50:26 -08:00
bloom_filter.c	bpf: Centralize permissions checks for all BPF map types	2023-06-19 14:04:04 +02:00
bpf_cgrp_storage.c	bpf: Teach verifier that certain helpers accept NULL pointer.	2023-04-04 16:57:16 -07:00
bpf_inode_storage.c	Networking changes for 6.4.	2023-04-26 16:07:23 -07:00
bpf_iter.c	bpf: Add __bpf_kfunc_{start,end}_defs macros	2023-11-01 22:33:53 -07:00
bpf_local_storage.c	bpf: bpf_sk_storage: Fix the missing uncharge in sk_omem_alloc	2023-09-06 11:08:14 +02:00
bpf_lru_list.c	bpf: Address KCSAN report on bpf_lru_list	2023-05-12 12:01:03 -07:00
bpf_lru_list.h	bpf: lru: Remove unused declaration bpf_lru_promote()	2023-08-08 17:21:42 -07:00
bpf_lsm.c
bpf_struct_ops.c	bpf: Charge modmem for struct_ops trampoline	2023-09-14 15:30:45 -07:00
bpf_struct_ops_types.h
bpf_task_storage.c	bpf: Teach verifier that certain helpers accept NULL pointer.	2023-04-04 16:57:16 -07:00
btf.c	bpf: Move GRAPH_{ROOT,NODE}_MASK macros into btf_field_type enum	2023-11-09 19:07:51 -08:00
cgroup.c	for-6.7/io_uring-sockopt-2023-10-30	2023-11-01 11:16:34 -10:00
cgroup_iter.c	bpf: Let verifier consider {task,cgroup} is trusted in bpf_iter_reg	2023-11-07 15:24:25 -08:00
core.c	bpf: Optimize the free of inner map	2023-12-04 17:50:26 -08:00
cpumap.c	net, bpf: Add a warning if NAPI cb missed xdp_do_flush().	2023-10-17 15:02:03 +02:00
cpumask.c	bpf: Add __bpf_kfunc_{start,end}_defs macros	2023-11-01 22:33:53 -07:00
devmap.c	net, bpf: Add a warning if NAPI cb missed xdp_do_flush().	2023-10-17 15:02:03 +02:00
disasm.c	bpf: change bpf_alu_sign_string and bpf_movsx_string to static	2023-08-04 16:15:50 -07:00
disasm.h
dispatcher.c
hashtab.c	bpf: Add map and need_defer parameters to .map_fd_put_ptr()	2023-12-04 17:50:26 -08:00
helpers.c	bpf: Check rcu_read_lock_trace_held() before calling bpf map helpers	2023-12-04 17:50:26 -08:00
inode.c	bpf: convert to new timestamp accessors	2023-10-18 14:08:30 +02:00
Kconfig	bpf: Add fd-based tcx multi-prog infra with link support	2023-07-19 10:07:27 -07:00
link_iter.c
local_storage.c	cgroup changes for v6.4-rc1	2023-04-29 10:05:22 -07:00
log.c	bpf: simplify tnum output if a fully known constant	2023-12-02 11:36:51 -08:00
lpm_trie.c	bpf, lpm: Fix check prefixlen before walking trie	2023-11-09 19:07:38 -08:00
Makefile	bpf: Add fd-based tcx multi-prog infra with link support	2023-07-19 10:07:27 -07:00
map_in_map.c	bpf: Optimize the free of inner map	2023-12-04 17:50:26 -08:00
map_in_map.h	bpf: Add map and need_defer parameters to .map_fd_put_ptr()	2023-12-04 17:50:26 -08:00
map_iter.c	bpf: Add __bpf_kfunc_{start,end}_defs macros	2023-11-01 22:33:53 -07:00
memalloc.c	bpf: Add missed allocation hint for bpf_mem_cache_alloc_flags()	2023-11-26 18:00:26 -08:00
mmap_unlock_work.h
mprog.c	bpf: Handle bpf_mprog_query with NULL entry	2023-10-06 17:11:20 -07:00
net_namespace.c
offload.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2023-09-21 21:49:45 +02:00
percpu_freelist.c
percpu_freelist.h
prog_iter.c
queue_stack_maps.c	bpf: Avoid deadlock when using queue and stack maps from NMI	2023-09-11 19:04:49 -07:00
reuseport_array.c	bpf: Centralize permissions checks for all BPF map types	2023-06-19 14:04:04 +02:00
ringbuf.c	bpf: Fold smp_mb__before_atomic() into atomic_set_release()	2023-10-24 14:26:07 +02:00
stackmap.c	bpf: Add crosstask check to __bpf_get_stack	2023-11-10 11:06:10 -08:00
syscall.c	bpf: Optimize the free of inner map	2023-12-04 17:50:26 -08:00
sysfs_btf.c
task_iter.c	bpf: bpf_iter_task_next: use next_task(kit->task) rather than next_task(kit->pos)	2023-11-19 11:43:44 -08:00
tcx.c	bpf, tcx: Get rid of tcx_link_const	2023-10-23 15:01:53 -07:00
tnum.c	bpf: simplify tnum output if a fully known constant	2023-12-02 11:36:51 -08:00
trampoline.c	bpf, x64: Fix tailcall infinite loop	2023-09-12 13:06:12 -07:00
verifier.c	bpf: preserve STACK_ZERO slots on partial reg spills	2023-12-05 13:40:20 -08:00