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| author | Eric Dumazet <edumazet@google.com> | 2018-03-08 13:16:47 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-03-11 16:25:14 +0100 |
| commit | 8c4626bf15bad3f8b6cde2848408b8d3f96fccf0 (patch) | |
| tree | bb3b3bc33c068358224d0fdfddb340501f3980f9 /drivers/fpga/fpga-mgr.c | |
| parent | 18fa1b102cc2198d43e89e55dfdf3dd8d02e101c (diff) | |
bpf: add schedule points in percpu arrays management
[ upstream commit 32fff239de37ef226d5b66329dd133f64d63b22d ]
syszbot managed to trigger RCU detected stalls in
bpf_array_free_percpu()
It takes time to allocate a huge percpu map, but even more time to free
it.
Since we run in process context, use cond_resched() to yield cpu if
needed.
Fixes: a10423b87a7e ("bpf: introduce BPF_MAP_TYPE_PERCPU_ARRAY map")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/fpga/fpga-mgr.c')
0 files changed, 0 insertions, 0 deletions