INFO: task syz.3.117:6487 blocked for more than 143 seconds. Not tainted 6.11.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.3.117 state:D stack:27392 pid:6487 tgid:6485 ppid:6163 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:5188 [inline] __schedule+0x17ae/0x4a10 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6621 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678 rwsem_down_read_slowpath kernel/locking/rwsem.c:1086 [inline] __down_read_common kernel/locking/rwsem.c:1250 [inline] __down_read kernel/locking/rwsem.c:1263 [inline] down_read+0x705/0xa40 kernel/locking/rwsem.c:1528 __super_lock fs/super.c:58 [inline] super_lock+0x27c/0x400 fs/super.c:120 user_get_super+0xd2/0x180 fs/super.c:1000 quotactl_block fs/quota/quota.c:890 [inline] __do_sys_quotactl fs/quota/quota.c:955 [inline] __se_sys_quotactl+0x527/0xa30 fs/quota/quota.c:917 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fee00b79e79 RSP: 002b:00007fee005de038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3 RAX: ffffffffffffffda RBX: 00007fee00d16058 RCX: 00007fee00b79e79 RDX: 0000000000000000 RSI: 0000000020000080 RDI: ffffffff80000800 RBP: 00007fee00be793e R08: 0000000000000000 R09: 0000000000000000 R10: 00000000200003c0 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fee00d16058 R15: 00007fffb7ed2c28 Showing all locks held in the system: 1 lock held by khungtaskd/30: #0: ffffffff8e738320 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline] #0: ffffffff8e738320 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline] #0: ffffffff8e738320 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6626 2 locks held by kworker/u8:3/52: 3 locks held by kworker/u8:7/2519: #0: ffff88802a38d148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline] #0: ffff88802a38d148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312 #1: ffffc900093ffd00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline] #1: ffffc900093ffd00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312 #2: ffffffff8fa72588 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4194 3 locks held by kworker/u9:1/4607: #0: ffff888023b6a148 ((wq_completion)hci8){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline] #0: ffff888023b6a148 ((wq_completion)hci8){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312 #1: ffffc9000dff7d00 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline] #1: ffffc9000dff7d00 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312 #2: ffff88805ffd0d80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_cmd_sync_work+0x1ec/0x400 net/bluetooth/hci_sync.c:327 2 locks held by getty/4967: #0: ffff88802af030a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc9000312b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ac/0x1e00 drivers/tty/n_tty.c:2211 3 locks held by kworker/0:4/5262: #0: ffff888015480948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline] #0: ffff888015480948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312 #1: ffffc90003f3fd00 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline] #1: ffffc90003f3fd00 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312 #2: ffff88803dec9240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x2d1/0x4130 drivers/net/netdevsim/fib.c:1489 3 locks held by kworker/1:5/5265: #0: ffff888015480948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline] #0: ffff888015480948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312 #1: ffffc90003f7fd00 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline] #1: ffffc90003f7fd00 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312 #2: ffff88803fd8d240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x2d1/0x4130 drivers/net/netdevsim/fib.c:1489 2 locks held by syz-executor/5655: #0: ffff888040ae60e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline] #0: ffff888040ae60e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff888040ae60e0 (&type->s_umount_key#52){++++}-{3:3}, at: deactivate_super+0xb5/0xf0 fs/super.c:505 #1: ffffffff8eb47868 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb2/0x530 fs/jfs/jfs_logmgr.c:1444 2 locks held by syz-executor/5707: #0: ffff8880619940e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline] #0: ffff8880619940e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff8880619940e0 (&type->s_umount_key#52){++++}-{3:3}, at: deactivate_super+0xb5/0xf0 fs/super.c:505 #1: ffffffff8eb47868 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb2/0x530 fs/jfs/jfs_logmgr.c:1444 2 locks held by syz-executor/5919: #0: ffff88806654e0e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline] #0: ffff88806654e0e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff88806654e0e0 (&type->s_umount_key#52){++++}-{3:3}, at: deactivate_super+0xb5/0xf0 fs/super.c:505 #1: ffffffff8eb47868 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb2/0x530 fs/jfs/jfs_logmgr.c:1444 1 lock held by syz.3.117/6487: #0: ffff8880619940e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880619940e0 (&type->s_umount_key#52){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.4.124/6586: #0: ffff888040ae60e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline] #0: ffff888040ae60e0 (&type->s_umount_key#52){++++}-{3:3}, at: super_lock+0x196/0x400 fs/super.c:120 1 lock held by syz.2.140/6685: #0: ffff88806654e0e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff88806654e0e0 (&type->s_umount_key#52){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.3.165/6847: #0: ffff8880619940e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880619940e0 (&type->s_umount_key#52){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.2.171/6910: #0: ffff88806654e0e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff88806654e0e0 (&type->s_umount_key#52){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.3.183/7038: #0: ffff8880619940e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880619940e0 (&type->s_umount_key#52){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.3.183/7040: #0: ffff8880619940e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880619940e0 (&type->s_umount_key#52){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 2 locks held by syz.0.212/7057: #0: ffff88807cf2c0e0 (&type->s_umount_key#51/1){+.+.}-{3:3}, at: alloc_super+0x221/0x9d0 fs/super.c:344 #1: ffffffff8eb47868 (jfs_log_mutex){+.+.}-{3:3}, at: open_dummy_log fs/jfs/jfs_logmgr.c:1191 [inline] #1: ffffffff8eb47868 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogOpen+0x1b2/0x1040 fs/jfs/jfs_logmgr.c:1066 1 lock held by syz.4.214/7066: #0: ffff888040ae60e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff888040ae60e0 (&type->s_umount_key#52){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz-executor/7143: #0: ffff88804fe460e0 (&type->s_umount_key#65){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline] #0: ffff88804fe460e0 (&type->s_umount_key#65){+.+.}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff88804fe460e0 (&type->s_umount_key#65){+.+.}-{3:3}, at: deactivate_super+0xb5/0xf0 fs/super.c:505 1 lock held by syz.0.262/7399: #0: ffff8880619940e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880619940e0 (&type->s_umount_key#52){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.0.262/7403: #0: ffff8880619940e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880619940e0 (&type->s_umount_key#52){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.0.262/7404: #0: ffff8880619940e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880619940e0 (&type->s_umount_key#52){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.0.262/7407: #0: ffff8880619940e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880619940e0 (&type->s_umount_key#52){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.0.262/7408: #0: ffff8880619940e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880619940e0 (&type->s_umount_key#52){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.0.262/7410: #0: ffff8880619940e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880619940e0 (&type->s_umount_key#52){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz-executor/7714: #0: ffffffff8e73d6f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:328 [inline] #0: ffffffff8e73d6f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x451/0x830 kernel/rcu/tree_exp.h:958 1 lock held by syz.3.350/7756: #0: ffff8880619940e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline] #0: ffff8880619940e0 (&type->s_umount_key#52){++++}-{3:3}, at: super_lock+0x196/0x400 fs/super.c:120 1 lock held by syz.0.374/7904: #0: ffffffff8e73d6f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:328 [inline] #0: ffffffff8e73d6f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x451/0x830 kernel/rcu/tree_exp.h:958 1 lock held by dhcpcd/7919: #0: ffff88805eaf1a08 (&sb->s_type->i_mutex_key#9){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:799 [inline] #0: ffff88805eaf1a08 (&sb->s_type->i_mutex_key#9){+.+.}-{3:3}, at: __sock_release net/socket.c:658 [inline] #0: ffff88805eaf1a08 (&sb->s_type->i_mutex_key#9){+.+.}-{3:3}, at: sock_close+0x90/0x240 net/socket.c:1421 ============================================= NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Call Trace: __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline] watchdog+0xff4/0x1040 kernel/hung_task.c:379 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 7827 Comm: syz-executor Not tainted 6.11.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 RIP: 0010:check_kcov_mode kernel/kcov.c:193 [inline] RIP: 0010:write_comp_data kernel/kcov.c:245 [inline] RIP: 0010:__sanitizer_cov_trace_switch+0xc3/0x120 kernel/kcov.c:350 Code: 8b 74 d6 10 65 8b 05 24 43 70 7e 25 00 01 ff 00 74 11 3d 00 01 00 00 75 de 41 83 bb 1c 16 00 00 00 74 d4 41 8b 83 f8 15 00 00 <83> f8 03 75 c8 49 8b 8b 00 16 00 00 45 8b bb fc 15 00 00 49 c1 e7 RSP: 0018:ffffc90002e87440 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff8880205d8000 RDX: 0000000000000000 RSI: ffffffff8e5a3da0 RDI: 0000000000000005 RBP: 0000000000000005 R08: 0000000000000005 R09: ffffffff81412f0e R10: 0000000000000008 R11: ffff8880205d8000 R12: ffffffff900e7cc4 R13: dffffc0000000000 R14: 0000000000000002 R15: 1ffff920005d0ea8 FS: 0000000000000000(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007facfbe44440 CR3: 000000000e534000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: unwind_next_frame+0x7be/0x2a00 arch/x86/kernel/unwind_orc.c:515 arch_stack_walk+0x151/0x1b0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122 save_stack+0xfb/0x1f0 mm/page_owner.c:156 __reset_page_owner+0x76/0x430 mm/page_owner.c:297 reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1094 [inline] free_unref_page+0xd19/0xea0 mm/page_alloc.c:2612 vfree+0x186/0x2e0 mm/vmalloc.c:3364 kcov_put kernel/kcov.c:438 [inline] kcov_close+0x2b/0x50 kernel/kcov.c:534 __fput+0x24a/0x8a0 fs/file_table.c:422 task_work_run+0x24f/0x310 kernel/task_work.c:228 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0xa2f/0x27f0 kernel/exit.c:882 do_group_exit+0x207/0x2c0 kernel/exit.c:1031 get_signal+0x1695/0x1730 kernel/signal.c:2917 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f5e8897895f Code: Unable to access opcode bytes at 0x7f5e88978935. RSP: 002b:00007ffeb1577710 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: 0000000000000003 RBX: 0000000000000005 RCX: 00007f5e8897895f RDX: 0000000000000003 RSI: 00007ffeb1577760 RDI: 0000000000000005 RBP: 00007f5e889e8a01 R08: 0000000000000000 R09: 00007ffeb1577567 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003 R13: 00007ffeb1577760 R14: 00007f5e89644620 R15: 0000000000000003