INFO: task syz-executor.3:32244 can't die for more than 143 seconds. task:syz-executor.3 state:D stack:29440 pid:32244 ppid: 29711 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4688 [inline] __schedule+0xb38/0x58c0 kernel/sched/core.c:5945 schedule+0xcf/0x270 kernel/sched/core.c:6024 request_wait_answer+0x4a4/0x850 fs/fuse/dev.c:411 __fuse_request_send fs/fuse/dev.c:430 [inline] fuse_simple_request+0x58a/0xcd0 fs/fuse/dev.c:515 fuse_listxattr+0x2c6/0x5d0 fs/fuse/xattr.c:145 vfs_listxattr+0x105/0x190 fs/xattr.c:446 listxattr+0xf6/0x180 fs/xattr.c:747 path_listxattr+0xae/0x140 fs/xattr.c:771 do_syscall_64+0x31/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665d9 RSP: 002b:00007f04508d3188 EFLAGS: 00000246 ORIG_RAX: 00000000000000c3 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200000c0 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffe2a101ebf R14: 00007f04508d3300 R15: 0000000000022000 INFO: task syz-executor.3:32244 blocked for more than 143 seconds. Not tainted 5.13.0-rc2-next-20210518-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:29440 pid:32244 ppid: 29711 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4688 [inline] __schedule+0xb38/0x58c0 kernel/sched/core.c:5945 schedule+0xcf/0x270 kernel/sched/core.c:6024 request_wait_answer+0x4a4/0x850 fs/fuse/dev.c:411 __fuse_request_send fs/fuse/dev.c:430 [inline] fuse_simple_request+0x58a/0xcd0 fs/fuse/dev.c:515 fuse_listxattr+0x2c6/0x5d0 fs/fuse/xattr.c:145 vfs_listxattr+0x105/0x190 fs/xattr.c:446 listxattr+0xf6/0x180 fs/xattr.c:747 path_listxattr+0xae/0x140 fs/xattr.c:771 do_syscall_64+0x31/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665d9 RSP: 002b:00007f04508d3188 EFLAGS: 00000246 ORIG_RAX: 00000000000000c3 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200000c0 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffe2a101ebf R14: 00007f04508d3300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1645: #0: ffffffff8c17afe0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6333 1 lock held by in:imklog/8151: #0: ffff8880218b1c70 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990 2 locks held by agetty/8155: #0: ffff888030107098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:253 #1: ffffc9000115c2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2113 3 locks held by kworker/u4:16/28627: #0: ffff8880b9d35718 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:460 #1: ffff8880b9d1f988 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x1b8/0x670 kernel/sched/psi.c:863 #2: ffff8880b9d24258 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x5a/0x1f0 kernel/time/timer.c:944 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1645 Comm: khungtaskd Not tainted 5.13.0-rc2-next-20210518-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x13e/0x1d6 lib/dump_stack.c:129 nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:254 [inline] watchdog+0xd3b/0xf50 kernel/hung_task.c:339 kthread+0x3b1/0x4a0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 22592 Comm: kworker/u4:10 Not tainted 5.13.0-rc2-next-20210518-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: phy20 ieee80211_iface_work RIP: 0010:unwind_next_frame+0xed4/0x1ce0 arch/x86/kernel/unwind_orc.c:611 Code: c0 74 08 3c 03 0f 8e 90 0a 00 00 41 3b 2e 0f 84 b9 05 00 00 bf 01 00 00 00 e8 b8 c7 1b 00 b8 01 00 00 00 65 8b 15 8c c7 ce 7e <85> d2 0f 85 aa f1 ff ff e8 56 1d cd ff e9 a0 f1 ff ff 4c 8b 7c 24 RSP: 0018:ffffc90001feebd8 EFLAGS: 00000297 RAX: 0000000000000001 RBX: 1ffff920003fdd83 RCX: 0000000000000000 RDX: 0000000080000000 RSI: 0000000000000001 RDI: 0000000000000001 RBP: ffffc90001feedd8 R08: ffffffff8e66ddac R09: 0000000000000001 R10: fffff520003fdda1 R11: 0000000000086087 R12: ffffc90001fe8000 R13: ffffc90001feece5 R14: ffffc90001feecb0 R15: ffffffff8e66ddb0 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd7b5ebc000 CR3: 0000000014de8000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: arch_stack_walk+0x7d/0xe0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:431 [inline] ____kasan_kmalloc mm/kasan/common.c:510 [inline] ____kasan_kmalloc mm/kasan/common.c:469 [inline] __kasan_kmalloc+0x9b/0xd0 mm/kasan/common.c:519 kmalloc include/linux/slab.h:595 [inline] kzalloc include/linux/slab.h:720 [inline] cfg80211_inform_single_bss_frame_data+0x302/0xee0 net/wireless/scan.c:2376 cfg80211_inform_bss_frame_data+0xa7/0xb10 net/wireless/scan.c:2437 ieee80211_bss_info_update+0x374/0xb30 net/mac80211/scan.c:190 ieee80211_rx_bss_info net/mac80211/ibss.c:1126 [inline] ieee80211_rx_mgmt_probe_beacon+0xc95/0x16c0 net/mac80211/ibss.c:1615 ieee80211_ibss_rx_queued_mgmt+0xd30/0x1610 net/mac80211/ibss.c:1642 ieee80211_iface_work+0x761/0x9e0 net/mac80211/iface.c:1437 process_one_work+0x98d/0x1600 kernel/workqueue.c:2275 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421 kthread+0x3b1/0x4a0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294