Jason Wang 7fc17e909e bpf: cpumap: use GFP_KERNEL instead of GFP_ATOMIC in __cpu_map_entry_alloc() ...

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>

2018-02-14 15:34:27 +01:00

..

arraymap.c

bpf: arraymap: use bpf_map_init_from_attr()

2018-01-18 22:54:25 +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: fix a verification error for a CGROUP_DEVICE type prog

2017-12-19 01:43:29 +01:00

core.c

bpf: fix bpf_prog_array_copy_to_user() issues

2018-02-03 01:49:21 +01:00

cpumap.c

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

2018-02-14 15:34:27 +01:00

devmap.c

bpf: add helper for copying attrs to struct bpf_map

2018-01-14 23:36:29 +01:00

disasm.c

bpf: allow for correlation of maps and helpers in dump

2017-12-20 18:09:40 -08:00

disasm.h

bpf: annotate bpf_insn_print_t with __printf

2018-01-17 01:15:05 +01:00

hashtab.c

bpf: add helper for copying attrs to struct bpf_map

2018-01-14 23:36:29 +01:00

helpers.c

bpf: rename ARG_PTR_TO_STACK

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

inode.c

Merge branch 'work.mqueue' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2018-01-30 18:32:21 -08:00

lpm_trie.c

bpf: fix memory leak in lpm_trie map_free callback function

2018-02-13 19:15:16 -08:00

Makefile

bpf: only build sockmap with CONFIG_INET

2018-01-04 19:01:14 +01:00

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: report device information about offloaded maps

2018-01-18 22:54:25 +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: fix sock_map_alloc() error path

2018-02-13 19:19:15 -08:00

stackmap.c

bpf: add helper for copying attrs to struct bpf_map

2018-01-14 23:36:29 +01:00

syscall.c

bpf: Use the IS_FD_ARRAY() macro in map_update_elem()

2018-01-25 18:05:24 -08:00

tnum.c

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

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

verifier.c

bpf: fix subprog verifier bypass by div/mod by 0 exception

2018-01-26 16:42:05 -08:00