INFO: task kcompactd0:30 blocked for more than 143 seconds. Not tainted 6.3.0-rc5-syzkaller-00137-gf2afccfefe7b #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kcompactd0 state:D stack:27144 pid:30 ppid:2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5307 [inline] __schedule+0xc91/0x5770 kernel/sched/core.c:6625 schedule+0xde/0x1a0 kernel/sched/core.c:6701 io_schedule+0xbe/0x130 kernel/sched/core.c:8887 folio_wait_bit_common+0x394/0x9b0 mm/filemap.c:1301 folio_lock include/linux/pagemap.h:952 [inline] migrate_folio_unmap mm/migrate.c:1165 [inline] migrate_pages_batch+0x1427/0x2fe0 mm/migrate.c:1680 migrate_pages_sync mm/migrate.c:1892 [inline] migrate_pages+0x1e74/0x27d0 mm/migrate.c:1973 compact_zone+0x1c98/0x39a0 mm/compaction.c:2420 proactive_compact_node+0x103/0x1b0 mm/compaction.c:2685 kcompactd+0x837/0xcc0 mm/compaction.c:2993 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/11: #0: ffffffff8c791a70 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:510 1 lock held by rcu_tasks_trace/12: #0: ffffffff8c791770 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:510 1 lock held by khungtaskd/27: #0: ffffffff8c7925c0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x340 kernel/locking/lockdep.c:6495 2 locks held by getty/4743: #0: ffff888024df9098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:244 #1: ffffc900020182f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 drivers/tty/n_tty.c:2177 2 locks held by kworker/u4:30/19485: 2 locks held by syz-executor.0/31557: #0: ffff88809679a0a8 (&ctx->uring_lock){+.+.}-{3:3}, at: __do_sys_io_uring_enter+0x96a/0x26e0 io_uring/io_uring.c:3457 #1: ffff88801ca0a8c0 (mapping.invalidate_lock#2){.+.+}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:813 [inline] #1: ffff88801ca0a8c0 (mapping.invalidate_lock#2){.+.+}-{3:3}, at: page_cache_ra_unbounded+0x153/0x5e0 mm/readahead.c:226 2 locks held by syz-executor.1/31561: 2 locks held by syz-executor.1/31789: #0: ffff88805a0660a8 (&ctx->uring_lock){+.+.}-{3:3}, at: __do_sys_io_uring_enter+0x96a/0x26e0 io_uring/io_uring.c:3457 #1: ffff88801ca0a8c0 (mapping.invalidate_lock#2){.+.+}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:813 [inline] #1: ffff88801ca0a8c0 (mapping.invalidate_lock#2){.+.+}-{3:3}, at: page_cache_ra_unbounded+0x153/0x5e0 mm/readahead.c:226 3 locks held by syz-executor.2/31884: 2 locks held by syz-executor.3/31998: 2 locks held by syz-executor.3/32101: 2 locks held by syz-executor.0/32223: 2 locks held by syz-executor.1/32366: 2 locks held by syz-executor.1/32525: 2 locks held by syz-executor.1/32639: 2 locks held by syz-executor.0/331: #0: ffff8880ae3360a8 (&ctx->uring_lock){+.+.}-{3:3}, at: __do_sys_io_uring_enter+0x96a/0x26e0 io_uring/io_uring.c:3457 #1: ffff88801ca0a8c0 (mapping.invalidate_lock#2){.+.+}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:813 [inline] #1: ffff88801ca0a8c0 (mapping.invalidate_lock#2){.+.+}-{3:3}, at: page_cache_ra_unbounded+0x153/0x5e0 mm/readahead.c:226 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 27 Comm: khungtaskd Not tainted 6.3.0-rc5-syzkaller-00137-gf2afccfefe7b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 nmi_cpu_backtrace+0x29c/0x350 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x2a4/0x300 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline] watchdog+0xe16/0x1090 kernel/hung_task.c:379 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 14 Comm: ksoftirqd/0 Not tainted 6.3.0-rc5-syzkaller-00137-gf2afccfefe7b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023 RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x31/0x70 kernel/kcov.c:207 Code: 4d c0 81 7e 89 c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b 14 25 c0 b8 03 00 a9 00 01 ff 00 74 0e 85 c9 74 35 8b 82 74 15 00 00 <85> c0 74 2b 8b 82 50 15 00 00 83 f8 02 75 20 48 8b 8a 58 15 00 00 RSP: 0018:ffffc9000034f970 EFLAGS: 00000206 RAX: 0000000000000000 RBX: ffff8880b290b7c0 RCX: 0000000000000100 RDX: ffff888016eee0c0 RSI: ffffffff89820c34 RDI: 0000000000000005 RBP: ffff888094864110 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: ffffc9000034fa70 R13: 0000000000000000 R14: ffffc9000034fc58 R15: ffff8880b290b7c0 FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555555880708 CR3: 00000000a32a7000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ieee80211_rx_h_check_dup net/mac80211/rx.c:1441 [inline] ieee80211_invoke_rx_handlers net/mac80211/rx.c:4083 [inline] ieee80211_prepare_and_rx_handle+0xe14/0x5dc0 net/mac80211/rx.c:4904 ieee80211_rx_for_interface+0x10e/0x200 net/mac80211/rx.c:4989 __ieee80211_rx_handle_packet net/mac80211/rx.c:5146 [inline] ieee80211_rx_list+0x1d03/0x2d10 net/mac80211/rx.c:5281 ieee80211_rx_napi+0xdf/0x410 net/mac80211/rx.c:5304 ieee80211_rx include/net/mac80211.h:4899 [inline] ieee80211_tasklet_handler+0xd8/0x140 net/mac80211/main.c:315 tasklet_action_common.constprop.0+0x201/0x2e0 kernel/softirq.c:797 __do_softirq+0x1d4/0x905 kernel/softirq.c:571 run_ksoftirqd kernel/softirq.c:934 [inline] run_ksoftirqd+0x31/0x60 kernel/softirq.c:926 smpboot_thread_fn+0x659/0x9e0 kernel/smpboot.c:164 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308