audit: audit_backlog=65 > audit_backlog_limit=64 audit: audit_lost=242867 audit_rate_limit=0 audit_backlog_limit=64 rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P8179/1:b..l rcu: (detected by 1, t=10503 jiffies, g=42525, q=480894 ncpus=2) task:kworker/u8:20 state:R running task stack:20744 pid:8179 tgid:8179 ppid:2 task_flags:0x24248060 flags:0x00080000 Workqueue: writeback wb_workfn (flush-8:0) Call Trace: context_switch kernel/sched/core.c:5256 [inline] __schedule+0x1139/0x6150 kernel/sched/core.c:6863 preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7190 irqentry_exit+0x1d8/0x8c0 kernel/entry/common.c:216 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:lock_release+0x183/0x2d0 kernel/locking/lockdep.c:5893 Code: 0f c1 05 f8 00 19 12 83 f8 01 0f 85 03 01 00 00 9c 58 f6 c4 02 0f 85 ee 00 00 00 41 f7 c5 00 02 00 00 74 01 fb 48 8b 44 24 10 <65> 48 2b 05 8d b9 18 12 0f 85 32 01 00 00 48 83 c4 18 5b 41 5c 41 RSP: 0018:ffffc90003336800 EFLAGS: 00000206 RAX: fc5566658704eb00 RBX: ffffffff8e3c96a0 RCX: ffffc9000333680c RDX: 0000000000000004 RSI: ffffffff8daa845f RDI: ffffffff8bf2b480 RBP: 0000000000000001 R08: 0000000000000001 R09: 00000000a6da81a5 R10: 0000000000000002 R11: 00000000000086e8 R12: ffffffff816cb9a4 R13: 0000000000000206 R14: ffff888076ab8000 R15: 0000000000000005 rcu_lock_release include/linux/rcupdate.h:341 [inline] rcu_read_unlock include/linux/rcupdate.h:897 [inline] class_rcu_destructor include/linux/rcupdate.h:1195 [inline] unwind_next_frame+0x3f9/0x20b0 arch/x86/kernel/unwind_orc.c:495 arch_stack_walk+0x94/0x100 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122 kasan_save_stack+0x33/0x60 mm/kasan/common.c:57 kasan_save_track+0x14/0x30 mm/kasan/common.c:78 unpoison_slab_object mm/kasan/common.c:340 [inline] __kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:366 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4953 [inline] slab_alloc_node mm/slub.c:5263 [inline] kmem_cache_alloc_noprof+0x25e/0x770 mm/slub.c:5270 mempool_alloc_noprof+0x1b4/0x2f0 mm/mempool.c:567 bio_alloc_bioset+0x3de/0x8c0 block/bio.c:565 bio_alloc include/linux/bio.h:374 [inline] io_submit_init_bio fs/ext4/page-io.c:426 [inline] io_submit_add_bh fs/ext4/page-io.c:448 [inline] ext4_bio_write_folio+0x7c3/0x1dc0 fs/ext4/page-io.c:589 mpage_process_page_bufs+0x47c/0x8d0 fs/ext4/inode.c:2198 mpage_prepare_extent_to_map+0x750/0x1510 fs/ext4/inode.c:2737 ext4_do_writepages+0xa11/0x3c80 fs/ext4/inode.c:2878 ext4_writepages+0x37a/0x7d0 fs/ext4/inode.c:3026 do_writepages+0x27a/0x600 mm/page-writeback.c:2598 __writeback_single_inode+0x168/0x14a0 fs/fs-writeback.c:1737 writeback_sb_inodes+0x72e/0x1ce0 fs/fs-writeback.c:2030 __writeback_inodes_wb+0xf8/0x2d0 fs/fs-writeback.c:2107 wb_writeback+0x799/0xae0 fs/fs-writeback.c:2218 wb_check_old_data_flush fs/fs-writeback.c:2322 [inline] wb_do_writeback fs/fs-writeback.c:2375 [inline] wb_workfn+0x8a0/0xbb0 fs/fs-writeback.c:2403 process_one_work+0x9ba/0x1b20 kernel/workqueue.c:3257 process_scheduled_works kernel/workqueue.c:3340 [inline] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3421 kthread+0x3c5/0x780 kernel/kthread.c:463 ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 net_ratelimit: 1159 callbacks suppressed bridge0: received packet on veth0_to_bridge with own address as source address (addr:4e:ba:33:e7:0a:47, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:4e:ba:33:e7:0a:47, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:4e:ba:33:e7:0a:47, vlan:0) audit_log_start: 18383 callbacks suppressed audit: audit_backlog=65 > audit_backlog_limit=64 audit: audit_lost=248995 audit_rate_limit=0 audit_backlog_limit=64 audit: backlog limit exceeded audit: audit_backlog=65 > audit_backlog_limit=64 audit: audit_lost=248997 audit_rate_limit=0 audit_backlog_limit=64 bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:4e:ba:33:e7:0a:47, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:4e:ba:33:e7:0a:47, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0) audit_log_start: 18118 callbacks suppressed audit: audit_backlog=65 > audit_backlog_limit=64 audit: audit_lost=254728 audit_rate_limit=0 audit_backlog_limit=64 audit: backlog limit exceeded audit: audit_backlog=65 > audit_backlog_limit=64 audit: audit_lost=254730 audit_rate_limit=0 audit_backlog_limit=64