================================================================== BUG: KCSAN: data-race in rcu_gp_fqs_check_wake / rcu_preempt_deferred_qs_irqrestore write to 0xffffffff85c7d190 of 8 bytes by task 16516 on cpu 0: rcu_preempt_deferred_qs_irqrestore+0x43d/0x580 kernel/rcu/tree_plugin.h:496 rcu_read_unlock_special kernel/rcu/tree_plugin.h:644 [inline] __rcu_read_unlock+0x16a/0x3d0 kernel/rcu/tree_plugin.h:383 rcu_read_unlock include/linux/rcupdate.h:670 [inline] memcg_kmem_get_cache+0x1e9/0x320 mm/memcontrol.c:2807 slab_pre_alloc_hook mm/slab.h:572 [inline] slab_alloc mm/slab.c:3306 [inline] __do_kmalloc mm/slab.c:3654 [inline] __kmalloc+0x13e/0x690 mm/slab.c:3665 kmalloc include/linux/slab.h:561 [inline] __d_alloc+0x3b5/0x4b0 fs/dcache.c:1706 d_alloc+0x49/0x170 fs/dcache.c:1769 d_alloc_parallel+0x84/0xe00 fs/dcache.c:2521 lookup_open fs/namei.c:3154 [inline] do_last fs/namei.c:3331 [inline] path_openat+0x1cef/0x3580 fs/namei.c:3537 do_filp_open+0x11e/0x1b0 fs/namei.c:3567 do_sys_open+0x3b3/0x4f0 fs/open.c:1097 __do_sys_openat fs/open.c:1124 [inline] __se_sys_openat fs/open.c:1118 [inline] __x64_sys_openat+0x62/0x80 fs/open.c:1118 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffffffff85c7d190 of 8 bytes by task 10 on cpu 1: rcu_gp_fqs_check_wake kernel/rcu/tree.c:1606 [inline] rcu_gp_fqs_check_wake+0x93/0xd0 kernel/rcu/tree.c:1596 rcu_gp_fqs_loop+0x1df/0x580 kernel/rcu/tree.c:1661 rcu_gp_kthread+0x143/0x230 kernel/rcu/tree.c:1821 kthread+0x1d4/0x200 drivers/block/aoe/aoecmd.c:1253 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 10 Comm: rcu_preempt Not tainted 5.5.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================