mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
synced 2026-11-06 17:39:01 +01:00
Eric Dumazet
75134f16e7
syzbot reported various soft lockups caused by bpf batch operations. INFO: task kworker/1:1:27 blocked for more than 140 seconds. INFO: task hung in rcu_barrier Nothing prevents batch ops to process huge amount of data, we need to add schedule points in them. Note that maybe_wait_bpf_programs(map) calls from generic_map_delete_batch() can be factorized by moving the call after the loop. This will be done later in -next tree once we get this fix merged, unless there is strong opinion doing this optimization sooner. Fixes:aa2e93b8e5("bpf: Add generic support for update and delete batch ops") Fixes:cb4d03ab49("bpf: Add generic support for lookup batch op") Reported-by: syzbot <[email protected]> Signed-off-by: Eric Dumazet <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]> Reviewed-by: Stanislav Fomichev <[email protected]> Acked-by: Brian Vazquez <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]