INFO: task segctord:9712 blocked for more than 140 seconds. Not tainted 4.19.211-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. audit: type=1800 audit(1668685922.520:728): pid=24162 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.3" name="bus" dev="sda1" ino=15121 res=0 segctord D30088 9712 2 0x80000000 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:589 [inline] rwsem_down_write_failed+0x3aa/0x760 kernel/locking/rwsem-xadd.c:618 audit: type=1800 audit(1668685922.770:729): pid=24176 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.3" name="bus" dev="sda1" ino=13931 res=0 call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:117 __down_write arch/x86/include/asm/rwsem.h:142 [inline] down_write+0x4f/0x90 kernel/locking/rwsem.c:72 nilfs_transaction_lock+0x1fb/0x8b0 fs/nilfs2/segment.c:362 nilfs_segctor_thread_construct fs/nilfs2/segment.c:2479 [inline] nilfs_segctor_thread+0x3c0/0xf50 fs/nilfs2/segment.c:2563 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Showing all locks held in the system: 1 lock held by khungtaskd/1569: #0: 00000000433e8aa6 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 1 lock held by systemd-udevd/4697: 1 lock held by in:imklog/7823: #0: 00000000a0a0ff31 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 6 locks held by syz-executor.4/9699: 1 lock held by segctord/9712: #0: 000000001904d9ed (&nilfs->ns_segctor_sem){++++}, at: nilfs_transaction_lock+0x1fb/0x8b0 fs/nilfs2/segment.c:362 2 locks held by kworker/u4:11/22566: 1 lock held by syz-executor.2/24182: #0: 00000000ba275547 (&runtime->oss.params_lock){+.+.}, at: snd_pcm_oss_read1 sound/core/oss/pcm_oss.c:1510 [inline] #0: 00000000ba275547 (&runtime->oss.params_lock){+.+.}, at: snd_pcm_oss_read+0x30e/0x6b0 sound/core/oss/pcm_oss.c:2763 2 locks held by syz-executor.3/24216: #0: 000000008e42e2b6 (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1826 [inline] #0: 000000008e42e2b6 (&rq->lock){-.-.}, at: __schedule+0x1f9/0x2040 kernel/sched/core.c:3455 #1: 00000000433e8aa6 (rcu_read_lock){....}, at: trace_sched_stat_runtime include/trace/events/sched.h:428 [inline] #1: 00000000433e8aa6 (rcu_read_lock){....}, at: update_curr+0x2c3/0x870 kernel/sched/fair.c:857 2 locks held by syz-executor.1/24229: 1 lock held by syz-executor.2/24228: #0: 00000000c9e77d73 (&runtime->oss.params_lock){+.+.}, at: snd_pcm_oss_read1 sound/core/oss/pcm_oss.c:1510 [inline] #0: 00000000c9e77d73 (&runtime->oss.params_lock){+.+.}, at: snd_pcm_oss_read+0x30e/0x6b0 sound/core/oss/pcm_oss.c:2763 1 lock held by syz-executor.3/24258: 1 lock held by syz-executor.5/24256: 3 locks held by syz-executor.2/24264: ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1569 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x991/0xe60 kernel/hung_task.c:287 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 20651 Comm: kworker/u4:9 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Workqueue: phy9 ieee80211_iface_work RIP: 0010:ieee80211_sta_get_rates+0x51d/0x860 net/mac80211/util.c:1706 Code: 89 fa 83 e2 07 83 c2 01 38 ca 7c 08 84 c9 0f 85 c0 02 00 00 8b 74 24 20 41 0f b7 44 24 04 44 8b 7c 24 14 8d 44 06 ff 99 f7 fe <44> 89 fe 41 89 c4 89 c7 e8 d6 ab bd f9 45 39 fc 0f 85 23 ff ff ff RSP: 0018:ffff88804838f690 EFLAGS: 00000246 RAX: 00000000000001e0 RBX: 000000000000000a RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8880475ac0b4 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000004 R11: 0000000000000000 R12: ffff8880475ac0b0 R13: 000000000000000c R14: ffff8880475ab588 R15: 00000000000000f0 FS: 0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0bd8454000 CR3: 00000000a0e8b000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ieee80211_update_sta_info net/mac80211/ibss.c:1014 [inline] ieee80211_rx_bss_info net/mac80211/ibss.c:1123 [inline] ieee80211_rx_mgmt_probe_beacon+0x552/0x15c0 net/mac80211/ibss.c:1607 ieee80211_ibss_rx_queued_mgmt+0xe27/0x18b0 net/mac80211/ibss.c:1634 ieee80211_iface_work+0x5c4/0x8a0 net/mac80211/iface.c:1341 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415