INFO: task syz-executor.0:28015 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. syz-executor.0 D28648 28015 8108 0x00000004 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 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 inode_lock include/linux/fs.h:748 [inline] fuse_flush+0x1fd/0x5b0 fs/fuse/file.c:421 filp_close+0xb4/0x160 fs/open.c:1162 __close_fd+0x133/0x200 fs/file.c:636 __do_sys_close fs/open.c:1181 [inline] __se_sys_close fs/open.c:1179 [inline] __x64_sys_close+0x69/0x100 fs/open.c:1179 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f5f5258737b Code: Bad RIP value. RSP: 002b:00007ffd407a3a90 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007f5f5258737b RDX: 0000001b2dd20000 RSI: 0000001b2dd26288 RDI: 0000000000000004 RBP: 00007f5f526f8980 R08: 0000000000000000 R09: 000000003253460c R10: 00006f9b3e54610b R11: 0000000000000293 R12: 000000000009858d R13: 00007ffd407a3b90 R14: 00007f5f526f7120 R15: 0000000000000032 INFO: task syz-executor.0:28021 blocked for more than 140 seconds. Not tainted 4.19.211-syzkaller #0 EXT4-fs warning (device sda1): ext4_ioctl:814: Setting inode version is not supported with metadata_csum enabled. "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D28184 28021 8108 0x00000004 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 EXT4-fs (sda1): re-mounted. Opts: (null) fuse_wait_on_page_writeback fs/fuse/file.c:383 [inline] fuse_wait_on_page_writeback.isra.0+0x11b/0x170 fs/fuse/file.c:379 fuse_launder_page fs/fuse/file.c:2033 [inline] fuse_launder_page+0xb6/0xe0 fs/fuse/file.c:2026 do_launder_page mm/truncate.c:655 [inline] invalidate_inode_pages2_range+0x795/0x1110 mm/truncate.c:725 fuse_finish_open+0x2e2/0x590 fs/fuse/file.c:182 fuse_open_common+0x236/0x2c0 fs/fuse/file.c:222 do_dentry_open+0x4aa/0x1160 fs/open.c:796 do_last fs/namei.c:3421 [inline] path_openat+0x793/0x2df0 fs/namei.c:3537 do_filp_open+0x18c/0x3f0 fs/namei.c:3567 do_sys_open+0x3b3/0x520 fs/open.c:1085 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f5f525d55a9 Code: Bad RIP value. RSP: 002b:00007f5f50f49168 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007f5f526f6f80 RCX: 00007f5f525d55a9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000100 RBP: 00007f5f52630580 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd407a3a2f R14: 00007f5f50f49300 R15: 0000000000022000 INFO: task syz-executor.0:28031 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. syz-executor.0 D28520 28031 8108 0x00000004 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 io_schedule+0xb5/0x120 kernel/sched/core.c:5181 wait_on_page_bit_common mm/filemap.c:1123 [inline] __lock_page+0x316/0x460 mm/filemap.c:1296 lock_page include/linux/pagemap.h:484 [inline] invalidate_inode_pages2_range+0xb3f/0x1110 mm/truncate.c:713 fuse_finish_open+0x2e2/0x590 fs/fuse/file.c:182 fuse_open_common+0x254/0x2c0 fs/fuse/file.c:222 do_dentry_open+0x4aa/0x1160 fs/open.c:796 do_last fs/namei.c:3421 [inline] path_openat+0x793/0x2df0 fs/namei.c:3537 do_filp_open+0x18c/0x3f0 fs/namei.c:3567 do_sys_open+0x3b3/0x520 fs/open.c:1085 EXT4-fs (sda1): re-mounted. Opts: (null) do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f5f525d55a9 Code: Bad RIP value. RSP: 002b:00007f5f50f28168 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f5f526f7050 RCX: 00007f5f525d55a9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200001c0 RBP: 00007f5f52630580 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd407a3a2f R14: 00007f5f50f28300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1571: #0: 000000007a837ddf (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 1 lock held by in:imklog/7794: #0: 000000000238b7eb (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 2 locks held by kworker/u4:7/9518: #0: 000000004f0a58db (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1826 [inline] #0: 000000004f0a58db (&rq->lock){-.-.}, at: __schedule+0x1f9/0x2040 kernel/sched/core.c:3455 #1: 000000007a837ddf (rcu_read_lock){....}, at: trace_sched_stat_runtime include/trace/events/sched.h:428 [inline] #1: 000000007a837ddf (rcu_read_lock){....}, at: update_curr+0x2c3/0x870 kernel/sched/fair.c:857 1 lock held by syz-executor.0/28015: #0: 000000009c8e3a79 (&sb->s_type->i_mutex_key#29){+.+.}, at: inode_lock include/linux/fs.h:748 [inline] #0: 000000009c8e3a79 (&sb->s_type->i_mutex_key#29){+.+.}, at: fuse_flush+0x1fd/0x5b0 fs/fuse/file.c:421 2 locks held by syz-executor.0/28031: #0: 00000000c85ae7f5 (sb_writers#24){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline] #0: 00000000c85ae7f5 (sb_writers#24){.+.+}, at: mnt_want_write+0x3a/0xb0 fs/namespace.c:360 #1: 000000009c8e3a79 (&sb->s_type->i_mutex_key#29){+.+.}, at: inode_lock include/linux/fs.h:748 [inline] #1: 000000009c8e3a79 (&sb->s_type->i_mutex_key#29){+.+.}, at: fuse_open_common+0x1bc/0x2c0 fs/fuse/file.c:215 1 lock held by syz-executor.2/4695: #0: 000000006375ce57 (rcu_preempt_state.barrier_mutex){+.+.}, at: _rcu_barrier+0x59/0x3e0 kernel/rcu/tree.c:3430 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1571 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 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 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 9518 Comm: kworker/u4:7 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Workqueue: phy20 ieee80211_iface_work RIP: 0010:trace_kfree_skb_hit+0x0/0x20 net/core/drop_monitor.c:205 Code: cf e8 94 d1 14 fb e9 9a fe ff ff e8 ea d4 14 fb e9 26 ff ff ff 48 c7 c7 80 d9 e0 89 e8 09 d2 14 fb e9 e3 fe ff ff 0f 1f 40 00 <55> 48 89 d5 e8 07 f5 de fa 48 89 ef 5d e9 7e fa ff ff 66 66 2e 0f RSP: 0018:ffff8880534efca0 EFLAGS: 00000286 RAX: 1ffff110154af6c3 RBX: ffff8880aa57b628 RCX: ffffffff8670b614 RDX: ffffffff879b7389 RSI: ffff8880adea6c00 RDI: 0000000000000000 RBP: ffff8880adea6c00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000007 R11: 0000000000000000 R12: ffffffff86839060 R13: dffffc0000000000 R14: ffffffff879b7389 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9e80c231b8 CR3: 00000000a9f07000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: trace_kfree_skb include/trace/events/skb.h:15 [inline] kfree_skb+0x216/0x3d0 net/core/skbuff.c:671 ieee80211_iface_work+0x289/0x8a0 net/mac80211/iface.c:1353 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