Alexei Starovoitov 8ebe667c41 bpf: rcu lock must not be held when calling copy_to_user() ... BUG: sleeping function called from invalid context at mm/memory.c:3732 in_atomic(): 0, irqs_disabled(): 0, pid: 671, name: test_maps 1 lock held by test_maps/671: #0: (rcu_read_lock){......}, at: [<0000000000264190>] map_lookup_elem+0xe8/0x260 Call Trace: ([<0000000000115b7e>] show_trace+0x12e/0x150) [<0000000000115c40>] show_stack+0xa0/0x100 [<00000000009b163c>] dump_stack+0x74/0xc8 [<000000000017424a>] ___might_sleep+0x23a/0x248 [<00000000002b58e8>] might_fault+0x70/0xe8 [<0000000000264230>] map_lookup_elem+0x188/0x260 [<0000000000264716>] SyS_bpf+0x20e/0x840 Fix it by allocating temporary buffer to store map element value. Fixes: db20fd2b01 ("bpf: add lookup/update/delete/iterate methods to BPF maps") Reported-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Alexei Starovoitov <ast@plumgrid.com> Acked-by: Daniel Borkmann <dborkman@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2015-01-26 17:20:40 -08:00
..
arraymap.c	bpf: fix arraymap NULL deref and missing overflow and zero size checks	2014-11-19 15:40:00 -05:00
core.c	bpf: split eBPF out of NET	2014-10-27 19:09:59 -04:00
hashtab.c	bpf: fix arraymap NULL deref and missing overflow and zero size checks	2014-11-19 15:40:00 -05:00
helpers.c	bpf: allow eBPF programs to use maps	2014-11-18 13:44:00 -05:00
Makefile	bpf: allow eBPF programs to use maps	2014-11-18 13:44:00 -05:00
syscall.c	bpf: rcu lock must not be held when calling copy_to_user()	2015-01-26 17:20:40 -08:00
test_stub.c	bpf: remove test map scaffolding and user proper types	2014-11-18 13:44:00 -05:00
verifier.c	bpf: verifier: add checks for BPF_ABS | BPF_IND instructions	2014-12-05 21:47:32 -08:00