INFO: task syz.1.197:7193 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.197       state:D stack:24072 pid:7193  tgid:7192  ppid:5843   task_flags:0x440140 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 xlog_grant_head_wait+0x453/0xa20
 xlog_grant_head_check+0x286/0x420
 xfs_log_reserve+0x2cc/0x780
 xfs_trans_alloc+0x29c/0x980
 xfs_trans_alloc_inode+0x13c/0x4a0
 xfs_attr_set+0x7fa/0x1210
 xfs_xattr_set+0x14d/0x250
 __vfs_setxattr+0x43c/0x480
 __vfs_setxattr_noperm+0x12d/0x660
 vfs_setxattr+0x16b/0x2f0
 filename_setxattr+0x274/0x600
 path_setxattrat+0x364/0x3a0
 __x64_sys_lsetxattr+0xbf/0xe0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4df798ebe9
RSP: 002b:00007f4df8717038 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd
RAX: ffffffffffffffda RBX: 00007f4df7bb5fa0 RCX: 00007f4df798ebe9
RDX: 0000200000000100 RSI: 0000200000000040 RDI: 0000200000000000
RBP: 00007f4df7a11e19 R08: 0000000000000002 R09: 0000000000000000
R10: 000000000000fffe R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4df7bb6038 R14: 00007f4df7bb5fa0 R15: 00007ffd484eb828
 </TASK>
INFO: task syz.1.197:7214 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.197       state:D stack:22888 pid:7214  tgid:7192  ppid:5843   task_flags:0x440040 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 xlog_grant_head_wait+0x453/0xa20
 xlog_grant_head_check+0x286/0x420
 xfs_log_reserve+0x2cc/0x780
 xfs_trans_alloc+0x29c/0x980
 xfs_fs_dirty_inode+0x12f/0x1e0
 __mark_inode_dirty+0x2ec/0xe10
 generic_update_time+0xc2/0xd0
 xfs_vn_update_time+0x25d/0x570
 file_modified_flags+0x3f1/0x560
 xfs_file_write_checks+0x987/0xa10
 xfs_file_buffered_write+0x19e/0x8a0
 do_iter_readv_writev+0x61c/0x8b0
 vfs_writev+0x31a/0x960
 __se_sys_pwritev2+0x179/0x290
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4df798ebe9
RSP: 002b:00007f4df5bf6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000148
RAX: ffffffffffffffda RBX: 00007f4df7bb6090 RCX: 00007f4df798ebe9
RDX: 0000000000000001 RSI: 00002000000001c0 RDI: 0000000000000005
RBP: 00007f4df7a11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000e7b R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4df7bb6128 R14: 00007f4df7bb6090 R15: 00007ffd484eb828
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 34 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250
 nmi_cpu_backtrace+0x39e/0x3d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 watchdog+0xf93/0xfe0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 15099 Comm: syz.9.939 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:__rcu_read_unlock+0x0/0xe0
Code: 89 d9 80 e1 07 80 c1 03 38 c1 7c dc 48 89 df e8 46 fd 7b 00 eb d2 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 41 57 41 56 41 55 41 54 53 49 bf 00 00 00 00 00 fc ff
RSP: 0018:ffffc90006b97530 EFLAGS: 00000286
RAX: 156b3f9d5dd9cd00 RBX: ffffffff9041e901 RCX: 156b3f9d5dd9cd00
RDX: ffffc90006b97601 RSI: ffffffff8be33660 RDI: ffffffff8be33620
RBP: dffffc0000000000 R08: ffffc90006b97a10 R09: 0000000000000000
R10: ffffc90006b97658 R11: fffff52000d72ecd R12: ffffc90006b97a20
R13: ffffc90006b90000 R14: ffffc90006b97608 R15: ffffffff8172c195
FS:  000055558978f500(0000) GS:ffff8880b861b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f20170e7d60 CR3: 000000000df36000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 unwind_next_frame+0x19ae/0x2390
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 save_stack+0xf5/0x1f0
 __reset_page_owner+0x71/0x1f0
 __free_frozen_pages+0xbc4/0xd30
 vfree+0x25a/0x400
 kcov_close+0x28/0x50
 __fput+0x44c/0xa70
 task_work_run+0x1d4/0x260
 do_exit+0x6b5/0x2300
 do_group_exit+0x21c/0x2d0
 get_signal+0x1286/0x1340
 arch_do_signal_or_restart+0x9a/0x750
 exit_to_user_mode_loop+0x75/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8ff078ebe9
Code: Unable to access opcode bytes at 0x7f8ff078ebbf.
RSP: 002b:00007ffffa0eacc8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffdfc RBX: 000000000003dcb6 RCX: 00007f8ff078ebe9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f8ff09b5fac
RBP: 0000000000000fd2 R08: 7fffffffffffffff R09: 00000005fa0eafbf
R10: 00007ffffa0eadc0 R11: 0000000000000246 R12: 00007f8ff09b5fac
R13: 00007ffffa0eadc0 R14: 000000000003ec88 R15: 00007ffffa0eade0
 </TASK>
