INFO: task syz-executor.3:26370 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.3 state:D stack:29336 pid:26370 ppid: 24207 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x999/0xe70 kernel/sched/core.c:5078 schedule+0x14b/0x200 kernel/sched/core.c:5157 rwsem_down_write_slowpath+0xd69/0x1370 kernel/locking/rwsem.c:1106 __down_write_common kernel/locking/rwsem.c:1261 [inline] __down_write kernel/locking/rwsem.c:1270 [inline] down_write+0x112/0x120 kernel/locking/rwsem.c:1407 inode_lock include/linux/fs.h:773 [inline] vfs_setxattr+0x148/0x310 fs/xattr.c:290 setxattr+0x125/0x240 fs/xattr.c:553 path_setxattr+0x109/0x1c0 fs/xattr.c:572 __do_sys_lsetxattr fs/xattr.c:594 [inline] __se_sys_lsetxattr fs/xattr.c:590 [inline] __x64_sys_lsetxattr+0xb4/0xd0 fs/xattr.c:590 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x466019 RSP: 002b:00007f986a2c2188 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd RAX: ffffffffffffffda RBX: 000000000056c008 RCX: 0000000000466019 RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000020000080 RBP: 00000000004bd067 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c008 R13: 00007ffc7db8fedf R14: 00007f986a2c2300 R15: 0000000000022000 INFO: task syz-executor.3:26371 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.3 state:D stack:28432 pid:26371 ppid: 24207 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x999/0xe70 kernel/sched/core.c:5078 schedule+0x14b/0x200 kernel/sched/core.c:5157 rwsem_down_write_slowpath+0xd69/0x1370 kernel/locking/rwsem.c:1106 __down_write_common kernel/locking/rwsem.c:1261 [inline] __down_write kernel/locking/rwsem.c:1270 [inline] down_write+0x112/0x120 kernel/locking/rwsem.c:1407 inode_lock include/linux/fs.h:773 [inline] lock_mount+0x6a/0x2f0 fs/namespace.c:2198 do_new_mount_fc fs/namespace.c:2824 [inline] do_new_mount fs/namespace.c:2883 [inline] path_mount+0x20d1/0x2a00 fs/namespace.c:3211 do_mount fs/namespace.c:3224 [inline] __do_sys_mount fs/namespace.c:3432 [inline] __se_sys_mount+0x28c/0x320 fs/namespace.c:3409 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x466019 RSP: 002b:00007f986a2a1188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000056c0b0 RCX: 0000000000466019 RDX: 0000000020002100 RSI: 00000000200042c0 RDI: 0000000000000000 RBP: 00000000004bd067 R08: 0000000020004300 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c0b0 R13: 00007ffc7db8fedf R14: 00007f986a2a1300 R15: 0000000000022000 INFO: task syz-executor.3:26394 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.3 state:D stack:29408 pid:26394 ppid: 24207 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x999/0xe70 kernel/sched/core.c:5078 schedule+0x14b/0x200 kernel/sched/core.c:5157 rwsem_down_write_slowpath+0xd69/0x1370 kernel/locking/rwsem.c:1106 __down_write_common kernel/locking/rwsem.c:1261 [inline] __down_write kernel/locking/rwsem.c:1270 [inline] down_write+0x112/0x120 kernel/locking/rwsem.c:1407 inode_lock include/linux/fs.h:773 [inline] vfs_setxattr+0x148/0x310 fs/xattr.c:290 setxattr+0x125/0x240 fs/xattr.c:553 path_setxattr+0x109/0x1c0 fs/xattr.c:572 __do_sys_lsetxattr fs/xattr.c:594 [inline] __se_sys_lsetxattr fs/xattr.c:590 [inline] __x64_sys_lsetxattr+0xb4/0xd0 fs/xattr.c:590 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x466019 RSP: 002b:00007f986a25f188 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd RAX: ffffffffffffffda RBX: 000000000056c200 RCX: 0000000000466019 RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000020000080 RBP: 00000000004bd067 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c200 R13: 00007ffc7db8fedf R14: 00007f986a25f300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1622: #0: ffffffff8c711680 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 arch/x86/pci/mmconfig_64.c:151 1 lock held by in:imklog/8119: #0: ffff8880188d6870 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:947 2 locks held by syz-executor.3/26367: 2 locks held by syz-executor.3/26370: #0: ffff8880721ca460 (sb_writers#19){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:354 #1: ffff888088cad910 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:773 [inline] #1: ffff888088cad910 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: vfs_setxattr+0x148/0x310 fs/xattr.c:290 1 lock held by syz-executor.3/26371: #0: ffff888088cad910 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:773 [inline] #0: ffff888088cad910 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lock_mount+0x6a/0x2f0 fs/namespace.c:2198 2 locks held by syz-executor.3/26394: #0: ffff8880721ca460 (sb_writers#19){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:354 #1: ffff888088cad910 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:773 [inline] #1: ffff888088cad910 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: vfs_setxattr+0x148/0x310 fs/xattr.c:290 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1622 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+0x137/0x1be lib/dump_stack.c:120 nmi_cpu_backtrace+0x16c/0x190 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x191/0x2f0 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+0xce9/0xd30 kernel/hung_task.c:294 kthread+0x39a/0x3c0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 24 Comm: kworker/u4:1 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:__lock_acquire+0x124e/0x5e90 kernel/locking/lockdep.c:4828 Code: 40 48 89 d8 48 c1 e8 03 80 3c 38 00 74 12 48 89 df e8 d6 bc 5f 00 48 bf 00 00 00 00 00 fc ff df 48 83 3b 00 0f 84 53 14 00 00 <48> 8b 44 24 50 8a 04 38 84 c0 0f 85 ff 1d 00 00 41 8b 5d 00 81 e3 RSP: 0018:ffffc90000defa00 EFLAGS: 00000086 RAX: 1ffffffff1ee67e0 RBX: ffffffff8f733f00 RCX: ffffffff815b9402 RDX: 0000000000000000 RSI: 0000000000000008 RDI: dffffc0000000000 RBP: ffffc90000defbb0 R08: dffffc0000000000 R09: fffffbfff1f216ab R10: fffffbfff1f216ab R11: 0000000000000000 R12: 000000005f4dc22c R13: ffff888011e44178 R14: 00000000710a186a R15: ffff888011e440f8 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc9d802e210 CR3: 000000003190a000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x114/0x5e0 kernel/locking/lockdep.c:5442 rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:259 rcu_read_lock include/linux/rcupdate.h:648 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:404 [inline] batadv_nc_worker+0xc8/0x5c0 net/batman-adv/network-coding.c:715 process_one_work+0x789/0xfc0 kernel/workqueue.c:2275 worker_thread+0xac1/0x1300 kernel/workqueue.c:2421 kthread+0x39a/0x3c0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296