rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P2532/1:b..l rcu: (detected by 1, t=10503 jiffies, g=18497, q=1090 ncpus=2) task:kworker/u8:9 state:R running task stack:25904 pid:2532 tgid:2532 ppid:2 flags:0x00004000 Workqueue: ext4-rsv-conversion ext4_end_io_rsv_work Call Trace: context_switch kernel/sched/core.c:5188 [inline] __schedule+0xe37/0x5490 kernel/sched/core.c:6529 preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:6851 irqentry_exit+0x36/0x90 kernel/entry/common.c:354 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:check_kcov_mode kernel/kcov.c:182 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x13/0x70 kernel/kcov.c:216 Code: 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 65 48 8b 15 54 5b 79 7e 65 8b 05 55 5b 79 7e 00 01 ff 00 48 8b 34 24 74 1d f6 c4 01 74 43 a9 00 00 0f 00 75 RSP: 0018:ffffc900092274d0 EFLAGS: 00000246 RAX: 0000000080000000 RBX: 0000000000000001 RCX: ffffffff81f1fb4e RDX: ffff888029e3bc00 RSI: 0000000000000001 RDI: 0000000000000006 RBP: ffff888016a668d0 R08: 0000000000000006 R09: 0000000000000001 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001 R13: 0000000000000000 R14: ffff888016a668cc R15: dffffc0000000000 __page_table_check_zero+0x2dd/0x370 mm/page_table_check.c:160 page_table_check_free include/linux/page_table_check.h:41 [inline] free_pages_prepare mm/page_alloc.c:1095 [inline] free_unref_page+0x659/0xe40 mm/page_alloc.c:2612 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x4e/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x192/0x1e0 mm/kasan/quarantine.c:286 __kasan_kmalloc+0x8a/0xb0 mm/kasan/common.c:378 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slub.c:4158 [inline] __kmalloc_noprof+0x1e8/0x400 mm/slub.c:4170 kmalloc_noprof include/linux/slab.h:685 [inline] kmalloc_array_noprof include/linux/slab.h:726 [inline] ext4_find_extent+0x95c/0xce0 fs/ext4/extents.c:914 ext4_ext_map_blocks+0x27d/0x5cd0 fs/ext4/extents.c:4144 ext4_map_blocks+0x61d/0x17d0 fs/ext4/inode.c:652 ext4_convert_unwritten_extents+0x2b7/0x4c0 fs/ext4/extents.c:4846 ext4_convert_unwritten_io_end_vec+0x127/0x280 fs/ext4/extents.c:4885 ext4_end_io_end fs/ext4/page-io.c:185 [inline] ext4_do_flush_completed_IO fs/ext4/page-io.c:258 [inline] ext4_end_io_rsv_work+0x2ca/0x690 fs/ext4/page-io.c:272 process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231 process_scheduled_works kernel/workqueue.c:3312 [inline] worker_thread+0x6c8/0xf20 kernel/workqueue.c:3390 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 net_ratelimit: 9028 callbacks suppressed bridge0: received packet on veth1_to_bridge with own address as source address (addr:4a:f5:78:3a:8f:de, vlan:0) bridge0: received packet on veth1_to_bridge with own address as source address (addr:4a:f5:78:3a:8f:de, vlan:0) bridge0: received packet on veth1_to_bridge with own address as source address (addr:4a:f5:78:3a:8f:de, vlan:0) bridge0: received packet on veth1_to_bridge with own address as source address (addr:4a:f5:78:3a:8f:de, vlan:0) bridge0: received packet on veth1_to_bridge with own address as source address (addr:4a:f5:78:3a:8f:de, vlan:0) net_ratelimit: 9336 callbacks suppressed bridge0: received packet on veth1_to_bridge with own address as source address (addr:4a:f5:78:3a:8f:de, vlan:0) bridge0: received packet on veth1_to_bridge with own address as source address (addr:4a:f5:78:3a:8f:de, vlan:0) bridge0: received packet on veth1_to_bridge with own address as source address (addr:4a:f5:78:3a:8f:de, vlan:0) bridge0: received packet on veth1_to_bridge with own address as source address (addr:4a:f5:78:3a:8f:de, vlan:0) bridge0: received packet on veth1_to_bridge with own address as source address (addr:4a:f5:78:3a:8f:de, vlan:0)