blk_update_request: I/O error, dev loop3, sector 0
Buffer I/O error on dev loop3p2, logical block 0, async page read
blk_update_request: I/O error, dev loop3, sector 0
Buffer I/O error on dev loop3p2, logical block 0, async page read
Buffer I/O error on dev loop3p2, logical block 0, async page read
INFO: task syz-executor1:9009 blocked for more than 140 seconds.
Not tainted 4.9.119-g9dc978d #23
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor1 D29048 9009 3875 0x00000004
ffff8801b55ae000 ffff8801d53e8000 ffff8801d53e8000 ffff88019cbec800
ffff8801db321c18 ffff88019bf7f988 ffffffff839ebdcd ffffffff81235627
0000000000000000 ffff8801b55ae8c0 0000000600000007 ffff8801db3224e8
Call Trace:
[<ffffffff839ed3cf>] schedule+0x7f/0x1b0 kernel/sched/core.c:3553
[<ffffffff839f8a08>] __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:526 [inline]
[<ffffffff839f8a08>] rwsem_down_write_failed+0x598/0x990 kernel/locking/rwsem-xadd.c:555
[<ffffffff81ee8ec7>] call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:105
[<ffffffff839f67dc>] __down_write arch/x86/include/asm/rwsem.h:125 [inline]
[<ffffffff839f67dc>] down_write+0x5c/0xa0 kernel/locking/rwsem.c:54
[<ffffffff815f139b>] inode_lock include/linux/fs.h:766 [inline]
[<ffffffff815f139b>] vfs_setxattr+0x8b/0xe0 fs/xattr.c:218
[<ffffffff815f15ac>] setxattr+0x1bc/0x270 fs/xattr.c:449
[<ffffffff815f17c7>] path_setxattr+0x167/0x180 fs/xattr.c:468
[<ffffffff815f1b8b>] SYSC_setxattr fs/xattr.c:483 [inline]
[<ffffffff815f1b8b>] SyS_setxattr+0x3b/0x50 fs/xattr.c:479
[<ffffffff81006316>] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282
[<ffffffff839fccd3>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Showing all locks held in the system:
2 locks held by khungtaskd/519:
#0: (rcu_read_lock){......}, at: [<ffffffff813667bc>] check_hung_uninterruptible_tasks kernel/hung_task.c:168 [inline]
#0: (rcu_read_lock){......}, at: [<ffffffff813667bc>] watchdog+0x11c/0xa20 kernel/hung_task.c:239
#1: (tasklist_lock){.+.?..}, at: [<ffffffff81426027>] debug_show_all_locks+0x79/0x218 kernel/locking/lockdep.c:4336
2 locks held by getty/3778:
#0: (&tty->ldisc_sem){++++++}, at: [<ffffffff839fae72>] ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:367
#1: (&ldata->atomic_read_lock){+.+...}, at: [<ffffffff821208d2>] n_tty_read+0x202/0x16e0 drivers/tty/n_tty.c:2142
1 lock held by syz-executor1/8914:
#0: (&sb->s_type->i_mutex_key#23){++++++}, at: [<ffffffff81595061>] inode_lock_shared include/linux/fs.h:776 [inline]
#0: (&sb->s_type->i_mutex_key#23){++++++}, at: [<ffffffff81595061>] lookup_slow+0x141/0x470 fs/namei.c:1645
2 locks held by syz-executor1/9009:
#0: (sb_writers#17){.+.+.+}, at: [<ffffffff815e0e3f>] sb_start_write include/linux/fs.h:1573 [inline]
#0: (sb_writers#17){.+.+.+}, at: [<ffffffff815e0e3f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
#1: (&sb->s_type->i_mutex_key#23){++++++}, at: [<ffffffff815f139b>] inode_lock include/linux/fs.h:766 [inline]
#1: (&sb->s_type->i_mutex_key#23){++++++}, at: [<ffffffff815f139b>] vfs_setxattr+0x8b/0xe0 fs/xattr.c:218
1 lock held by syz-executor1/9011:
#0: (&sb->s_type->i_mutex_key#23){++++++}, at: [<ffffffff815e1c5c>] inode_lock include/linux/fs.h:766 [inline]
#0: (&sb->s_type->i_mutex_key#23){++++++}, at: [<ffffffff815e1c5c>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 519 Comm: khungtaskd Not tainted 4.9.119-g9dc978d #23
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
ffff8801d8617d08 ffffffff81eb4be9 0000000000000000 0000000000000000
0000000000000000 0000000000000001 ffffffff810b9bd0 ffff8801d8617d40
ffffffff81ebfee7 0000000000000000 0000000000000000 0000000000000003
Call Trace:
[<ffffffff81eb4be9>] __dump_stack lib/dump_stack.c:15 [inline]
[<ffffffff81eb4be9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
[<ffffffff81ebfee7>] nmi_cpu_backtrace.cold.2+0x48/0x87 lib/nmi_backtrace.c:99
[<ffffffff81ebfe7a>] nmi_trigger_cpumask_backtrace+0x12a/0x14f lib/nmi_backtrace.c:60
[<ffffffff810b9cd4>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37
[<ffffffff81366d54>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline]
[<ffffffff81366d54>] check_hung_task kernel/hung_task.c:125 [inline]
[<ffffffff81366d54>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline]
[<ffffffff81366d54>] watchdog+0x6b4/0xa20 kernel/hung_task.c:239
[<ffffffff8119d0ed>] kthread+0x26d/0x300 kernel/kthread.c:211
[<ffffffff839fce9c>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1 skipped: idling at pc 0xffffffff839fb8d6