INFO: task syz-executor.2:16151 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:27176 pid:16151 ppid: 8528 flags:0x20004004 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] __ia32_sys_mount+0x27e/0x300 fs/namespace.c:3444 do_syscall_32_irqs_on arch/x86/entry/common.c:77 [inline] __do_fast_syscall_32+0x56/0x80 arch/x86/entry/common.c:139 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:164 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7fa8549 RSP: 002b:00000000f55a25fc EFLAGS: 00000296 ORIG_RAX: 0000000000000015 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000200042c0 RDX: 0000000020002100 RSI: 0000000000000000 RDI: 0000000020000300 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 INFO: task syz-executor.1:16176 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.1 state:D stack:27760 pid:16176 ppid: 8438 flags:0x20000004 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] __ia32_sys_setxattr+0xbc/0x150 fs/xattr.c:605 do_syscall_32_irqs_on arch/x86/entry/common.c:77 [inline] __do_fast_syscall_32+0x56/0x80 arch/x86/entry/common.c:139 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:164 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7fac549 RSP: 002b:00000000f55a65fc EFLAGS: 00000296 ORIG_RAX: 00000000000000e2 RAX: ffffffffffffffda RBX: 0000000020000180 RCX: 00000000200001c0 RDX: 0000000020000740 RSI: 000000000000005c RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 INFO: task syz-executor.1:16204 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.1 state:D stack:27536 pid:16204 ppid: 8438 flags:0x20004004 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] __ia32_sys_mount+0x27e/0x300 fs/namespace.c:3444 do_syscall_32_irqs_on arch/x86/entry/common.c:77 [inline] __do_fast_syscall_32+0x56/0x80 arch/x86/entry/common.c:139 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:164 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7fac549 RSP: 002b:00000000f55435fc EFLAGS: 00000296 ORIG_RAX: 0000000000000015 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000200042c0 RDX: 0000000020002100 RSI: 0000000000000000 RDI: 0000000020000300 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 INFO: task syz-executor.1:16208 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.1 state:D stack:29528 pid:16208 ppid: 8438 flags:0x20000004 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] __ia32_sys_setxattr+0xbc/0x150 fs/xattr.c:605 do_syscall_32_irqs_on arch/x86/entry/common.c:77 [inline] __do_fast_syscall_32+0x56/0x80 arch/x86/entry/common.c:139 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:164 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7fac549 RSP: 002b:00000000f55015fc EFLAGS: 00000296 ORIG_RAX: 00000000000000e2 RAX: ffffffffffffffda RBX: 0000000020000180 RCX: 00000000200001c0 RDX: 0000000020000740 RSI: 000000000000005c RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Showing all locks held in the system: 1 lock held by khungtaskd/1652: #0: ffffffff8bf747e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6327 1 lock held by kworker/0:2/2933: #0: ffff8880b9c35198 (&rq->lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1321 [inline] #0: ffff8880b9c35198 (&rq->lock){-.-.}-{2:2}, at: __schedule+0x217/0x21a0 kernel/sched/core.c:4992 1 lock held by in:imklog/8109: #0: ffff888014526af0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:961 3 locks held by kworker/u4:6/8334: 1 lock held by syz-executor.2/16151: #0: ffff888032678ed0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:775 [inline] #0: ffff888032678ed0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lock_mount+0x8a/0x2e0 fs/namespace.c:2229 2 locks held by syz-executor.2/16155: 2 locks held by syz-executor.1/16176: #0: ffff88805f722460 (sb_writers#17){.+.+}-{0:0}, at: path_setxattr+0xb2/0x1c0 fs/xattr.c:591 #1: ffff88803267a310 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:775 [inline] #1: ffff88803267a310 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: vfs_setxattr+0x11c/0x330 fs/xattr.c:299 2 locks held by syz-executor.1/16185: 1 lock held by syz-executor.1/16204: #0: ffff88803267a310 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:775 [inline] #0: ffff88803267a310 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lock_mount+0x8a/0x2e0 fs/namespace.c:2229 2 locks held by syz-executor.1/16208: #0: ffff88805f722460 (sb_writers#17){.+.+}-{0:0}, at: path_setxattr+0xb2/0x1c0 fs/xattr.c:591 #1: ffff88803267a310 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:775 [inline] #1: ffff88803267a310 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: vfs_setxattr+0x11c/0x330 fs/xattr.c:299 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1652 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: 4813 Comm: systemd-journal Not tainted 5.11.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0033:0x7fa4c167146c Code: d1 49 89 e1 31 d2 41 b8 10 00 00 00 41 89 f6 49 89 e7 e8 57 fc ff ff 85 c0 41 89 c4 0f 88 5f ff ff ff 48 8b 04 24 4c 8b 40 08 <4d> 85 c0 0f 84 bb 00 00 00 49 83 f8 0f 0f 87 e1 00 00 00 e8 6c 7b RSP: 002b:00007ffca5733430 EFLAGS: 00000202 RAX: 00007fa4bec6de00 RBX: 000000000016be00 RCX: 000000000016be00 RDX: 0000000000000000 RSI: 0000000000000010 RDI: 000055d1a1a0b120 RBP: 000055d1a1a0ae80 R08: 0000000000001608 R09: 000055d1a1a0b120 R10: 0000000000014654 R11: 00007fa4bedd46f0 R12: 0000000000000001 R13: 00007ffca57334a8 R14: 0000000000000006 R15: 00007ffca5733430 FS: 00007fa4c19838c0 GS: 0000000000000000