INFO: task syz-executor.4:7374 blocked for more than 143 seconds. Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:25752 pid:7374 tgid:7371 ppid:5111 flags:0x00000006 Call Trace: context_switch kernel/sched/core.c:5409 [inline] __schedule+0x17d3/0x4a20 kernel/sched/core.c:6736 __schedule_loop kernel/sched/core.c:6813 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6828 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6885 rwsem_down_write_slowpath+0xeeb/0x13b0 kernel/locking/rwsem.c:1178 __down_write_common+0x1af/0x200 kernel/locking/rwsem.c:1306 filemap_invalidate_lock include/linux/fs.h:838 [inline] blkdev_fallocate+0x233/0x550 block/fops.c:797 vfs_fallocate+0x566/0x6c0 fs/open.c:330 madvise_remove mm/madvise.c:1002 [inline] madvise_vma_behavior mm/madvise.c:1026 [inline] madvise_walk_vmas mm/madvise.c:1261 [inline] do_madvise+0x1b50/0x4840 mm/madvise.c:1441 __do_sys_madvise mm/madvise.c:1454 [inline] __se_sys_madvise mm/madvise.c:1452 [inline] __x64_sys_madvise+0xa6/0xc0 mm/madvise.c:1452 do_syscall_64+0xfd/0x240 entry_SYSCALL_64_after_hwframe+0x6d/0x75 RIP: 0033:0x7f997b47dda9 RSP: 002b:00007f997c26d0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000001c RAX: ffffffffffffffda RBX: 00007f997b5abf80 RCX: 00007f997b47dda9 RDX: 0000000000000009 RSI: 0000000000c00304 RDI: 0000000020000000 RBP: 00007f997b4ca47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f997b5abf80 R15: 00007ffde68f0f08 INFO: task syz-executor.1:7373 blocked for more than 144 seconds. Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:24632 pid:7373 tgid:7373 ppid:5829 flags:0x00000006 Call Trace: context_switch kernel/sched/core.c:5409 [inline] __schedule+0x17d3/0x4a20 kernel/sched/core.c:6736 __schedule_loop kernel/sched/core.c:6813 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6828 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6885 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 filemap_invalidate_lock_shared include/linux/fs.h:848 [inline] page_cache_ra_unbounded+0xf2/0x7c0 mm/readahead.c:225 do_sync_mmap_readahead+0x444/0x850 filemap_fault+0x7c6/0x1680 mm/filemap.c:3245 __do_fault+0x137/0x460 mm/memory.c:4396 do_shared_fault mm/memory.c:4818 [inline] do_fault mm/memory.c:4892 [inline] do_pte_missing mm/memory.c:3745 [inline] handle_pte_fault mm/memory.c:5164 [inline] __handle_mm_fault+0x23c3/0x72d0 mm/memory.c:5305 handle_mm_fault+0x3c2/0x8a0 mm/memory.c:5470 do_user_addr_fault arch/x86/mm/fault.c:1362 [inline] handle_page_fault arch/x86/mm/fault.c:1505 [inline] exc_page_fault+0x446/0x890 arch/x86/mm/fault.c:1563 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0033:0x7fbfec82c551 RSP: 002b:00007ffd524bb740 EFLAGS: 00010246 RAX: 0000000020000040 RBX: 00007ffd524bb888 RCX: 0000000000000000 RDX: 0000000000000004 RSI: 0000000000000000 RDI: 000055555b6e8360 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 R13: fffffffffffffffe R14: 00007fbfec400000 R15: 00007fbfec400260 Showing all locks held in the system: 3 locks held by kworker/0:0/7: #0: ffff888014c74948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3229 [inline] #0: ffff888014c74948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x8e0/0x1770 kernel/workqueue.c:3335 #1: ffffc900000c7d00 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3230 [inline] #1: ffffc900000c7d00 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_scheduled_works+0x91b/0x1770 kernel/workqueue.c:3335 #2: ffff88809d480240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x2d1/0x4130 drivers/net/netdevsim/fib.c:1489 1 lock held by khungtaskd/29: #0: ffffffff8e132020 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline] #0: ffffffff8e132020 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline] #0: ffffffff8e132020 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614 3 locks held by kworker/u8:2/42: #0: ffff88802a07c948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3229 [inline] #0: ffff88802a07c948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x8e0/0x1770 kernel/workqueue.c:3335 #1: ffffc90000b27d00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3230 [inline] #1: ffffc90000b27d00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x91b/0x1770 kernel/workqueue.c:3335 #2: ffffffff8f38da88 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4191 3 locks held by kworker/u8:8/1273: 2 locks held by getty/4827: #0: ffff88802aa970a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2201 1 lock held by syz-executor.5/7263: 1 lock held by syz-executor.4/7374: #0: ffff88801d0970c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:838 [inline] #0: ffff88801d0970c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x233/0x550 block/fops.c:797 1 lock held by syz-executor.1/7373: #0: ffff88801d0970c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:848 [inline] #0: ffff88801d0970c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: page_cache_ra_unbounded+0xf2/0x7c0 mm/readahead.c:225 1 lock held by syz-executor.2/7477: #0: ffff88801d0970c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:848 [inline] #0: ffff88801d0970c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: page_cache_ra_unbounded+0xf2/0x7c0 mm/readahead.c:225 1 lock held by syz-executor.5/7536: #0: ffff88801d0970c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:838 [inline] #0: ffff88801d0970c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x233/0x550 block/fops.c:797 1 lock held by syz-executor.5/7538: #0: ffff88801d0970c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:838 [inline] #0: ffff88801d0970c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x233/0x550 block/fops.c:797 1 lock held by syz-executor.0/7539: #0: ffff88801d0970c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:838 [inline] #0: ffff88801d0970c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x233/0x550 block/fops.c:797 1 lock held by syz-executor.1/7607: #0: ffff88801d0970c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:848 [inline] #0: ffff88801d0970c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: page_cache_ra_unbounded+0xf2/0x7c0 mm/readahead.c:225 1 lock held by syz-executor.3/7653: #0: ffff88801d0970c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:838 [inline] #0: ffff88801d0970c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x233/0x550 block/fops.c:797 1 lock held by syz-executor.0/7747: #0: ffff88801d0970c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:848 [inline] #0: ffff88801d0970c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: page_cache_ra_unbounded+0xf2/0x7c0 mm/readahead.c:225 1 lock held by syz-executor.2/7793: #0: ffff88801d0970c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:838 [inline] #0: ffff88801d0970c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x233/0x550 block/fops.c:797 1 lock held by syz-executor.4/7792: #0: ffff88801d0970c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:838 [inline] #0: ffff88801d0970c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x233/0x550 block/fops.c:797 1 lock held by syz-executor.3/7855: #0: ffff88801d0970c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:848 [inline] #0: ffff88801d0970c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: page_cache_ra_unbounded+0xf2/0x7c0 mm/readahead.c:225 1 lock held by syz-executor.1/7911: #0: ffff88801d0970c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:838 [inline] #0: ffff88801d0970c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x233/0x550 block/fops.c:797 1 lock held by syz-executor.2/7996: #0: ffff88801d0970c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:848 [inline] #0: ffff88801d0970c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: page_cache_ra_unbounded+0xf2/0x7c0 mm/readahead.c:225 3 locks held by syz-executor.3/8025: #0: ffffffff8f38da88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f38da88 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x842/0x10d0 net/core/rtnetlink.c:6592 #1: ffff88803bc05408 (&wg->device_update_lock){+.+.}-{3:3}, at: wg_open+0x22d/0x420 drivers/net/wireguard/device.c:50 #2: ffffffff8e1373b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:291 [inline] #2: ffffffff8e1373b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x39a/0x820 kernel/rcu/tree_exp.h:939 1 lock held by syz-executor.4/8044: #0: ffff88801d0970c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:838 [inline] #0: ffff88801d0970c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x233/0x550 block/fops.c:797 1 lock held by syz-executor.1/8085: #0: ffff8880b943e358 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 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:160 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline] watchdog+0xfb0/0xff0 kernel/hung_task.c:379 kthread+0x2f2/0x390 kernel/kthread.c:388 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 8025 Comm: syz-executor.3 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 RIP: 0010:unwind_next_frame+0x18a/0x2a00 Code: 49 be 00 00 00 00 00 fc ff df 48 89 44 24 78 42 0f b6 04 30 84 c0 48 8b 5c 24 20 48 89 54 24 10 0f 85 f6 1f 00 00 48 0f be 2a <48> 8b 44 24 30 42 80 3c 30 00 74 08 48 89 df e8 62 b3 b7 00 48 03 RSP: 0018:ffffc900050ee808 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffffc900050ee928 RCX: ffff88801f43da00 RDX: ffffc900050ee915 RSI: 0000000000000001 RDI: ffffffff81409031 RBP: 0000000000000000 R08: ffffffff81409011 R09: ffffc900050ee9d0 R10: 0000000000000003 R11: ffffffff8180e0a0 R12: ffffc900050ee8e0 R13: ffffc900050ee930 R14: dffffc0000000000 R15: ffffffff86dde82c FS: 0000555556ccb480(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055555ad0b938 CR3: 000000015f1f2000 CR4: 0000000000350ef0 Call Trace: arch_stack_walk+0x151/0x1b0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:312 [inline] __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3798 [inline] slab_alloc_node mm/slub.c:3845 [inline] kmem_cache_alloc+0x174/0x340 mm/slub.c:3852 kmem_cache_zalloc include/linux/slab.h:739 [inline] lsm_inode_alloc security/security.c:670 [inline] security_inode_alloc+0x28/0x120 security/security.c:1581 inode_init_always+0x947/0xc70 fs/inode.c:232 alloc_inode fs/inode.c:268 [inline] new_inode_pseudo+0x9e/0x1e0 fs/inode.c:1007 new_inode+0x22/0x1d0 fs/inode.c:1033 debugfs_get_inode fs/debugfs/inode.c:72 [inline] __debugfs_create_file+0x14d/0x490 fs/debugfs/inode.c:437 add_link_files net/mac80211/debugfs_netdev.c:987 [inline] ieee80211_debugfs_add_netdev net/mac80211/debugfs_netdev.c:1014 [inline] ieee80211_debugfs_recreate_netdev+0xe7d/0x1400 net/mac80211/debugfs_netdev.c:1045 ieee80211_if_add+0x988/0x1770 net/mac80211/iface.c:2185 ieee80211_register_hw+0x321c/0x3d80 net/mac80211/main.c:1575 mac80211_hwsim_new_radio+0x25ac/0x4550 drivers/net/wireless/virtual/mac80211_hwsim.c:5454 hwsim_new_radio_nl+0xe4c/0x21d0 drivers/net/wireless/virtual/mac80211_hwsim.c:6135 genl_family_rcv_msg_doit net/netlink/genetlink.c:1113 [inline] genl_family_rcv_msg net/netlink/genetlink.c:1193 [inline] genl_rcv_msg+0xb16/0xec0 net/netlink/genetlink.c:1208 netlink_rcv_skb+0x1e5/0x430 net/netlink/af_netlink.c:2559 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1217 netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline] netlink_unicast+0x7ec/0x980 net/netlink/af_netlink.c:1361 netlink_sendmsg+0x8e1/0xcb0 net/netlink/af_netlink.c:1905 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x223/0x270 net/socket.c:745 __sys_sendto+0x3a4/0x4f0 net/socket.c:2191 __do_sys_sendto net/socket.c:2203 [inline] __se_sys_sendto net/socket.c:2199 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2199 do_syscall_64+0xfd/0x240 entry_SYSCALL_64_after_hwframe+0x6d/0x75 RIP: 0033:0x7fccfc07fa9c Code: 1a 51 02 00 44 8b 4c 24 2c 4c 8b 44 24 20 89 c5 44 8b 54 24 28 48 8b 54 24 18 b8 2c 00 00 00 48 8b 74 24 10 8b 7c 24 08 0f 05 <48> 3d 00 f0 ff ff 77 34 89 ef 48 89 44 24 08 e8 60 51 02 00 48 8b RSP: 002b:00007ffc4bb6e7e0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007fccfccd4620 RCX: 00007fccfc07fa9c RDX: 0000000000000024 RSI: 00007fccfccd4670 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007ffc4bb6e834 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003 R13: 0000000000000000 R14: 00007fccfccd4670 R15: 0000000000000000