attempt to access beyond end of device loop0: rw=0, want=308, limit=272 ieee802154 phy0 wpan0: encryption failed: -22 ieee802154 phy1 wpan1: encryption failed: -22 batman_adv: batadv0: Interface deactivated: batadv_slave_0 INFO: task syz-executor.2:18464 blocked for more than 140 seconds. Not tainted 4.19.178-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. batman_adv: batadv0: Removing interface: batadv_slave_0 syz-executor.2 D28816 18464 8124 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_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline] rwsem_down_read_failed+0x20a/0x390 kernel/locking/rwsem-xadd.c:309 call_rwsem_down_read_failed+0x14/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] down_read+0x44/0x80 kernel/locking/rwsem.c:26 inode_lock_shared include/linux/fs.h:758 [inline] lookup_slow fs/namei.c:1688 [inline] walk_component+0x798/0xda0 fs/namei.c:1811 lookup_last fs/namei.c:2274 [inline] path_lookupat+0x1ff/0x8d0 fs/namei.c:2319 filename_lookup+0x1ac/0x5a0 fs/namei.c:2349 user_path_at include/linux/namei.h:57 [inline] ksys_chdir+0x84/0x1d0 fs/open.c:458 __do_sys_chdir fs/open.c:480 [inline] __se_sys_chdir fs/open.c:478 [inline] __x64_sys_chdir+0x2d/0x40 fs/open.c:478 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x465f69 Code: Bad RIP value. RSP: 002b:00007fdbe2fed188 EFLAGS: 00000246 ORIG_RAX: 0000000000000050 RAX: ffffffffffffffda RBX: 000000000056c0b0 RCX: 0000000000465f69 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000040 RBP: 00000000004bfa67 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c0b0 R13: 00007fff699e744f R14: 00007fdbe2fed300 R15: 0000000000022000 batman_adv: batadv0: Interface deactivated: batadv_slave_1 batman_adv: batadv0: Removing interface: batadv_slave_1 INFO: task syz-executor.2:18470 blocked for more than 140 seconds. Not tainted 4.19.178-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D30344 18470 8124 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_nested+0x51/0x90 kernel/locking/rwsem.c:194 inode_lock_nested include/linux/fs.h:783 [inline] filename_create+0x15a/0x490 fs/namei.c:3638 user_path_create fs/namei.c:3696 [inline] do_mkdirat+0xa0/0x2d0 fs/namei.c:3834 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x465f69 Code: Bad RIP value. RSP: 002b:00007fdbe2fcc188 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 000000000056c158 RCX: 0000000000465f69 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000180 RBP: 00000000004bfa67 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c158 R13: 00007fff699e744f R14: 00007fdbe2fcc300 R15: 0000000000022000 Showing all locks held in the system: device bridge_slave_1 left promiscuous mode 7 locks held by kworker/u4:1/23: 1 lock held by khungtaskd/1566: #0: 00000000199ec62f (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4440 1 lock held by in:imklog/7795: bridge0: port 2(bridge_slave_1) entered disabled state #0: 000000002838c162 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 2 locks held by kworker/1:3/8761: #0: 00000000cf191df1 ((wq_completion)"rcu_gp"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2123 #1: 000000008b9b4737 ((work_completion)(&rew.rew_work)){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2127 2 locks held by syz-executor.2/18385: 1 lock held by syz-executor.2/18464: #0: 00000000ba27979d (&type->i_mutex_dir_key#9){++++}, at: inode_lock_shared include/linux/fs.h:758 [inline] #0: 00000000ba27979d (&type->i_mutex_dir_key#9){++++}, at: lookup_slow fs/namei.c:1688 [inline] #0: 00000000ba27979d (&type->i_mutex_dir_key#9){++++}, at: walk_component+0x798/0xda0 fs/namei.c:1811 2 locks held by syz-executor.2/18470: #0: 00000000b0772776 (sb_writers#14){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline] #0: 00000000b0772776 (sb_writers#14){.+.+}, at: mnt_want_write+0x3a/0xb0 fs/namespace.c:360 #1: 00000000ba27979d (&type->i_mutex_dir_key#8/1){+.+.}, at: inode_lock_nested include/linux/fs.h:783 [inline] #1: 00000000ba27979d (&type->i_mutex_dir_key#8/1){+.+.}, at: filename_create+0x15a/0x490 fs/namei.c:3638 ============================================= device bridge_slave_0 left promiscuous mode NMI backtrace for cpu 0 CPU: 0 PID: 1566 Comm: khungtaskd Not tainted 4.19.178-syzkaller #0 bridge0: port 1(bridge_slave_0) entered disabled state Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 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: 8761 Comm: kworker/1:3 Not tainted 4.19.178-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: (null) (rcu_gp) RIP: 0010:rcu_read_lock_sched_held+0xe1/0x1d0 kernel/rcu/update.c:117 Code: 8b 95 84 08 00 00 85 d2 75 b4 e8 0a da 00 00 84 c0 0f 84 88 00 00 00 e8 3d 8c 00 00 84 c0 74 7f 48 b8 00 00 00 00 00 fc ff df <48> 89 da 83 e3 07 48 c1 ea 03 83 c3 03 0f b6 04 02 38 c3 7c 08 84 RSP: 0018:ffff88804ef37cc0 EFLAGS: 00000002 RAX: dffffc0000000000 RBX: ffffffff8a45d0e0 RCX: 0000000000000000 RDX: 0000000000000004 RSI: ffffffff8375bba1 RDI: 0000000000000001 RBP: ffff88804ef78600 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: ffff88804ef78600 R13: 000000000002b040 R14: ffff88804ef30000 R15: ffff8880ba12b040 FS: 0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000130 CR3: 0000000093c41000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: trace_rcu_utilization include/trace/events/rcu.h:21 [inline] rcu_note_context_switch+0xc77/0x1690 kernel/rcu/tree.c:435 __schedule+0x1f1/0x2040 kernel/sched/core.c:3445 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 worker_thread+0x14c/0x1130 kernel/workqueue.c:2316 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415