Jason Wang 056700807d bpf: cpumap: use GFP_KERNEL instead of GFP_ATOMIC in __cpu_map_entry_alloc() ...

commit 7fc17e909e upstream.

There're several implications after commit 0bf7800f17 ("ptr_ring:
try vmalloc() when kmalloc() fails") with the using of vmalloc() since
can't allow GFP_ATOMIC but mandate GFP_KERNEL. This will lead a WARN
since cpumap try to call with GFP_ATOMIC. Fortunately, entry
allocation of cpumap can only be done through syscall path which means
GFP_ATOMIC is not necessary, so fixing this by replacing GFP_ATOMIC
with GFP_KERNEL.

Reported-by: syzbot+1a240cdb1f4cc88819df@syzkaller.appspotmail.com
Fixes: 0bf7800f17 ("ptr_ring: try vmalloc() when kmalloc() fails")
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Jesper Dangaard Brouer <brouer@redhat.com>
Cc: akpm@linux-foundation.org
Cc: dhowells@redhat.com
Cc: hannes@cmpxchg.org
Signed-off-by: Jason Wang <jasowang@redhat.com>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2018-03-15 10:56:44 +01:00

..

arraymap.c

bpf: add schedule points in percpu arrays management

2018-03-11 16:25:14 +01:00

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

cgroup.c

bpf, cgroup: implement eBPF-based device controller for cgroup v2

2017-11-05 23:26:51 +09:00

core.c

bpf: fix divides by zero

2018-01-14 09:03:43 -08:00

cpumap.c

bpf: cpumap: use GFP_KERNEL instead of GFP_ATOMIC in __cpu_map_entry_alloc()

2018-03-15 10:56:44 +01:00

devmap.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

2017-10-22 13:39:14 +01:00

disasm.c

bpf: move instruction printing into a separate file

2017-10-10 12:30:16 -07:00

disasm.h

bpf: move instruction printing into a separate file

2017-10-10 12:30:16 -07:00

hashtab.c

bpf: add schedule points to map alloc/free

2017-12-12 15:27:22 -08:00

helpers.c

bpf: rename ARG_PTR_TO_STACK

2017-01-09 16:56:27 -05:00

inode.c

fix "netfilter: xt_bpf: Fix XT_BPF_MODE_FD_PINNED mode of 'xt_bpf_info_v1'"

2018-01-05 11:43:39 -05:00

lpm_trie.c

bpf: fix rcu lockdep warning for lpm_trie map_free callback

2018-03-11 16:25:13 +01:00

Makefile

bpf: offload: add infrastructure for loading programs for a specific netdev

2017-11-05 22:26:18 +09:00

map_in_map.c

bpf: Add syscall lookup support for fd array and htab

2017-06-29 13:13:25 -04:00

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: offload: add a license header

2017-11-27 22:24:51 +01:00

percpu_freelist.c

bpf: fix lockdep splat

2017-11-15 19:46:32 +09:00

percpu_freelist.h

bpf: introduce percpu_freelist

2016-03-08 15:28:31 -05:00

sockmap.c

bpf: sockmap missing NULL psock check

2018-01-07 00:01:46 +01:00

stackmap.c

bpf: Add file mode configuration into bpf maps

2017-10-20 13:32:59 +01:00

syscall.c

fix "netfilter: xt_bpf: Fix XT_BPF_MODE_FD_PINNED mode of 'xt_bpf_info_v1'"

2018-01-05 11:43:39 -05:00

tnum.c

bpf/verifier: track signed and unsigned min/max values

2017-08-08 17:51:34 -07:00

verifier.c

bpf: allow xadd only on aligned memory

2018-03-11 16:25:14 +01:00