INFO: task syz-executor.2:12995 blocked for more than 143 seconds. Not tainted 5.11.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:27208 pid:12995 ppid: 8558 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4324 [inline] __schedule+0x90c/0x21a0 kernel/sched/core.c:5075 schedule+0xcf/0x270 kernel/sched/core.c:5154 rwsem_down_write_slowpath+0x7e5/0x1200 kernel/locking/rwsem.c:1106 __down_write_common kernel/locking/rwsem.c:1261 [inline] __down_write_common kernel/locking/rwsem.c:1258 [inline] __down_write kernel/locking/rwsem.c:1270 [inline] down_write+0x137/0x150 kernel/locking/rwsem.c:1407 inode_lock include/linux/fs.h:775 [inline] vfs_setxattr+0x11c/0x330 fs/xattr.c:299 setxattr+0x218/0x2b0 fs/xattr.c:573 path_setxattr+0x197/0x1c0 fs/xattr.c:593 __do_sys_setxattr fs/xattr.c:609 [inline] __se_sys_setxattr fs/xattr.c:605 [inline] __x64_sys_setxattr+0xc0/0x160 fs/xattr.c:605 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x465ef9 RSP: 002b:00007f4d03ccf188 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465ef9 RDX: 0000000020000740 RSI: 00000000200001c0 RDI: 0000000020000180 RBP: 00000000004bcd1c R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000005c R11: 0000000000000246 R12: 000000000056bf60 R13: 0000000000a9fb1f R14: 00007f4d03ccf300 R15: 0000000000022000 INFO: task syz-executor.2:13073 blocked for more than 143 seconds. Not tainted 5.11.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:27416 pid:13073 ppid: 8558 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4324 [inline] __schedule+0x90c/0x21a0 kernel/sched/core.c:5075 schedule+0xcf/0x270 kernel/sched/core.c:5154 rwsem_down_write_slowpath+0x7e5/0x1200 kernel/locking/rwsem.c:1106 __down_write_common kernel/locking/rwsem.c:1261 [inline] __down_write_common kernel/locking/rwsem.c:1258 [inline] __down_write kernel/locking/rwsem.c:1270 [inline] down_write+0x137/0x150 kernel/locking/rwsem.c:1407 inode_lock include/linux/fs.h:775 [inline] lock_mount+0x8a/0x2e0 fs/namespace.c:2229 do_new_mount_fc fs/namespace.c:2859 [inline] do_new_mount fs/namespace.c:2918 [inline] path_mount+0x14d6/0x1f90 fs/namespace.c:3246 do_mount fs/namespace.c:3259 [inline] __do_sys_mount fs/namespace.c:3467 [inline] __se_sys_mount fs/namespace.c:3444 [inline] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3444 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x465ef9 RSP: 002b:00007f4d03c6c188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000056c158 RCX: 0000000000465ef9 RDX: 0000000020002100 RSI: 00000000200042c0 RDI: 0000000000000000 RBP: 00000000004bcd1c R08: 0000000020000300 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c158 R13: 0000000000a9fb1f R14: 00007f4d03c6c300 R15: 0000000000022000 INFO: task syz-executor.2:13086 blocked for more than 144 seconds. Not tainted 5.11.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:29560 pid:13086 ppid: 8558 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4324 [inline] __schedule+0x90c/0x21a0 kernel/sched/core.c:5075 schedule+0xcf/0x270 kernel/sched/core.c:5154 rwsem_down_write_slowpath+0x7e5/0x1200 kernel/locking/rwsem.c:1106 __down_write_common kernel/locking/rwsem.c:1261 [inline] __down_write_common kernel/locking/rwsem.c:1258 [inline] __down_write kernel/locking/rwsem.c:1270 [inline] down_write+0x137/0x150 kernel/locking/rwsem.c:1407 inode_lock include/linux/fs.h:775 [inline] vfs_setxattr+0x11c/0x330 fs/xattr.c:299 setxattr+0x218/0x2b0 fs/xattr.c:573 path_setxattr+0x197/0x1c0 fs/xattr.c:593 __do_sys_setxattr fs/xattr.c:609 [inline] __se_sys_setxattr fs/xattr.c:605 [inline] __x64_sys_setxattr+0xc0/0x160 fs/xattr.c:605 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x465ef9 RSP: 002b:00007f4d03c2a188 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc RAX: ffffffffffffffda RBX: 000000000056c2a8 RCX: 0000000000465ef9 RDX: 0000000020000740 RSI: 00000000200001c0 RDI: 0000000020000180 RBP: 00000000004bcd1c R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000005c R11: 0000000000000246 R12: 000000000056c2a8 R13: 0000000000a9fb1f R14: 00007f4d03c2a300 R15: 0000000000022000 INFO: task syz-executor.3:12996 blocked for more than 144 seconds. Not tainted 5.11.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:27792 pid:12996 ppid: 8694 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4324 [inline] __schedule+0x90c/0x21a0 kernel/sched/core.c:5075 schedule+0xcf/0x270 kernel/sched/core.c:5154 rwsem_down_write_slowpath+0x7e5/0x1200 kernel/locking/rwsem.c:1106 __down_write_common kernel/locking/rwsem.c:1261 [inline] __down_write_common kernel/locking/rwsem.c:1258 [inline] __down_write kernel/locking/rwsem.c:1270 [inline] down_write+0x137/0x150 kernel/locking/rwsem.c:1407 inode_lock include/linux/fs.h:775 [inline] lock_mount+0x8a/0x2e0 fs/namespace.c:2229 do_new_mount_fc fs/namespace.c:2859 [inline] do_new_mount fs/namespace.c:2918 [inline] path_mount+0x14d6/0x1f90 fs/namespace.c:3246 do_mount fs/namespace.c:3259 [inline] __do_sys_mount fs/namespace.c:3467 [inline] __se_sys_mount fs/namespace.c:3444 [inline] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3444 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x465ef9 RSP: 002b:00007f611de69188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465ef9 RDX: 0000000020002100 RSI: 00000000200042c0 RDI: 0000000000000000 RBP: 00000000004bcd1c R08: 0000000020000300 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 0000000000a9fb1f R14: 00007f611de69300 R15: 0000000000022000 Showing all locks held in the system: 3 locks held by kworker/u4:2/48: 1 lock held by khungtaskd/1663: #0: ffffffff8bf747e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6327 1 lock held by in:imklog/8073: #0: ffff88802613c5f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:961 2 locks held by kworker/1:5/9548: 2 locks held by syz-executor.2/12995: #0: ffff88801410e460 (sb_writers#15){.+.+}-{0:0}, at: path_setxattr+0xb2/0x1c0 fs/xattr.c:591 #1: ffff888032a32310 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:775 [inline] #1: ffff888032a32310 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: vfs_setxattr+0x11c/0x330 fs/xattr.c:299 2 locks held by syz-executor.2/13005: 1 lock held by syz-executor.2/13073: #0: ffff888032a32310 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:775 [inline] #0: ffff888032a32310 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lock_mount+0x8a/0x2e0 fs/namespace.c:2229 2 locks held by syz-executor.2/13086: #0: ffff88801410e460 (sb_writers#15){.+.+}-{0:0}, at: path_setxattr+0xb2/0x1c0 fs/xattr.c:591 #1: ffff888032a32310 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:775 [inline] #1: ffff888032a32310 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: vfs_setxattr+0x11c/0x330 fs/xattr.c:299 1 lock held by syz-executor.3/12996: #0: ffff88802aaa0ed0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:775 [inline] #0: ffff88802aaa0ed0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lock_mount+0x8a/0x2e0 fs/namespace.c:2229 4 locks held by syz-executor.3/13008: ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1663 Comm: khungtaskd Not tainted 5.11.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0xfa/0x151 lib/dump_stack.c:120 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:209 [inline] watchdog+0xd48/0xfb0 kernel/hung_task.c:294 kthread+0x3b1/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 13059 Comm: kworker/u4:8 Not tainted 5.11.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline] RIP: 0010:lockdep_hardirqs_on+0x9/0x100 kernel/locking/lockdep.c:4172 Code: 99 6b 89 e8 d9 0c 00 00 65 c7 05 3e 43 00 77 00 00 00 00 eb c3 66 66 2e 0f 1f 84 00 00 00 00 00 90 44 8b 05 f5 61 c4 04 55 53 <65> 48 8b 1c 25 00 f0 01 00 45 85 c0 0f 84 85 00 00 00 65 8b 05 ce RSP: 0018:ffffc90008dafbf0 EFLAGS: 00000046 RAX: 0000000000000001 RBX: 00000000fffffe00 RCX: 1ffffffff1f5fe52 RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffffffff8144d620 RBP: ffffffff88a21375 R08: 0000000000000001 R09: ffffffff8faaf937 R10: 0000000000000001 R11: 0000000000000000 R12: ffff88801c2fd6e8 R13: ffff88801c2fcbc0 R14: dffffc0000000000 R15: ffffffff88a215b0 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6a089da000 CR3: 0000000025b8d000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __local_bh_enable_ip+0xa0/0x110 kernel/softirq.c:201 spin_unlock_bh include/linux/spinlock.h:399 [inline] batadv_nc_purge_paths+0x2a5/0x3a0 net/batman-adv/network-coding.c:467 batadv_nc_worker+0x868/0xe50 net/batman-adv/network-coding.c:718 process_one_work+0x98d/0x1600 kernel/workqueue.c:2275 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421 kthread+0x3b1/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294