Alexei Starovoitov 3defaf2f15 bpf: fix lockdep false positive in stackmap ... Lockdep warns about false positive: [ 11.211460] ------------[ cut here ]------------ [ 11.211936] DEBUG_LOCKS_WARN_ON(depth <= 0) [ 11.211985] WARNING: CPU: 0 PID: 141 at ../kernel/locking/lockdep.c:3592 lock_release+0x1ad/0x280 [ 11.213134] Modules linked in: [ 11.214954] RIP: 0010:lock_release+0x1ad/0x280 [ 11.223508] Call Trace: [ 11.223705] <IRQ> [ 11.223874] ? __local_bh_enable+0x7a/0x80 [ 11.224199] up_read+0x1c/0xa0 [ 11.224446] do_up_read+0x12/0x20 [ 11.224713] irq_work_run_list+0x43/0x70 [ 11.225030] irq_work_run+0x26/0x50 [ 11.225310] smp_irq_work_interrupt+0x57/0x1f0 [ 11.225662] irq_work_interrupt+0xf/0x20 since rw_semaphore is released in a different task vs task that locked the sema. It is expected behavior. Fix the warning with up_read_non_owner() and rwsem_release() annotation. Fixes: bae77c5eb5 ("bpf: enable stackmap with build_id in nmi context") Signed-off-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>		2019-02-11 16:36:24 +01:00
..
arraymap.c	bpf: pass struct btf pointer to the map_check_btf() callback	2018-12-12 15:33:33 -08:00
bpf_lru_list.c	bpf: lru: Lower the PERCPU_NR_SCANS from 16 to 4	2017-04-17 13:55:52 -04:00
bpf_lru_list.h	bpf: Only set node->ref = 1 if it has not been set	2017-09-01 09:57:39 -07:00
btf.c	bpf: btf: allow typedef func_proto	2019-01-29 19:15:32 -08:00
cgroup.c	bpf: run bpf programs with preemption disabled	2019-01-31 23:14:55 +01:00
core.c	bpf: enable access to ax register also from verifier rewrite	2019-01-02 16:01:24 -08:00
cpumap.c	bpf/cpumap: make sure frame_size for build_skb is aligned if headroom isn't	2018-12-20 23:19:12 +01:00
devmap.c	bpf: devmap: fix wrong interface selection in notifier_call	2018-10-26 00:32:21 +02:00
disasm.c	bpf: Remove struct bpf_verifier_env argument from print_bpf_insn	2018-03-23 17:38:57 +01:00
disasm.h	bpf: Remove struct bpf_verifier_env argument from print_bpf_insn	2018-03-23 17:38:57 +01:00
hashtab.c	bpf: fix lockdep false positive in percpu_freelist	2019-01-31 23:18:21 +01:00
helpers.c	bpf: fix direct packet write into pop/peek helpers	2018-10-25 17:02:06 -07:00
inode.c	bpf: decouple btf from seq bpf fs dump and enable more maps	2018-08-13 00:52:45 +02:00
local_storage.c	bpf: enable cgroup local storage map pretty print with kind_flag	2018-12-18 01:11:59 +01:00
lpm_trie.c	bpf: pass struct btf pointer to the map_check_btf() callback	2018-12-12 15:33:33 -08:00
Makefile	bpf: add queue and stack maps	2018-10-19 13:24:31 -07:00
map_in_map.c	bpf: fix inner map masking to prevent oob under speculation	2019-01-18 15:19:56 -08:00
map_in_map.h	bpf: Add syscall lookup support for fd array and htab	2017-06-29 13:13:25 -04:00
offload.c	bpf: fix null pointer dereference on pointer offload	2018-11-16 20:48:27 -08:00
percpu_freelist.c	bpf: fix lockdep false positive in percpu_freelist	2019-01-31 23:18:21 +01:00
percpu_freelist.h	bpf: fix lockdep false positive in percpu_freelist	2019-01-31 23:18:21 +01:00
queue_stack_maps.c	bpf: fix integer overflow in queue_stack_map	2018-11-22 21:29:40 +01:00
reuseport_array.c	bpf: Introduce BPF_MAP_TYPE_REUSEPORT_SOCKARRAY	2018-08-11 01:58:46 +02:00
stackmap.c	bpf: fix lockdep false positive in stackmap	2019-02-11 16:36:24 +01:00
syscall.c	bpf: Fix syscall's stackmap lookup potential deadlock	2019-01-31 23:18:21 +01:00
tnum.c	bpf/verifier: improve register value range tracking with ARSH	2018-04-29 08:45:53 -07:00
verifier.c	bpf: Fix narrow load on a bpf_sock returned from sk_lookup()	2019-02-09 19:57:22 -08:00
xskmap.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2018-10-19 11:03:06 -07:00