INFO: task syz-executor.0:3633 blocked for more than 143 seconds.
Not tainted 5.19.0-rc3-syzkaller-00048-gde5c208d533a #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:23200 pid: 3633 ppid: 1 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5146 [inline]
__schedule+0xa00/0x4b50 kernel/sched/core.c:6458
schedule+0xd2/0x1f0 kernel/sched/core.c:6530
bit_wait+0x12/0xd0 kernel/sched/wait_bit.c:199
__wait_on_bit+0x60/0x190 kernel/sched/wait_bit.c:49
__inode_wait_for_writeback+0x153/0x1f0 fs/fs-writeback.c:1461
inode_wait_for_writeback+0x22/0x30 fs/fs-writeback.c:1473
evict+0x2b7/0x6b0 fs/inode.c:661
iput_final fs/inode.c:1744 [inline]
iput.part.0+0x562/0x820 fs/inode.c:1770
iput+0x58/0x70 fs/inode.c:1760
do_unlinkat+0x41b/0x650 fs/namei.c:4267
__do_sys_unlink fs/namei.c:4308 [inline]
__se_sys_unlink fs/namei.c:4306 [inline]
__x64_sys_unlink+0xc6/0x110 fs/namei.c:4306
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7f936fa88a47
RSP: 002b:00007ffc5e668428 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f936fa88a47
RDX: 00007ffc5e668460 RSI: 00007ffc5e668460 RDI: 00007ffc5e6684f0
RBP: 00007ffc5e6684f0 R08: 0000000000000001 R09: 00007ffc5e6682c0
R10: 0000555556ecb8c3 R11: 0000000000000206 R12: 00007f936fae21c8
R13: 00007ffc5e6695f0 R14: 0000555556ecb850 R15: 00007ffc5e66a6f0
INFO: task syz-executor.2:18010 blocked for more than 143 seconds.
Not tainted 5.19.0-rc3-syzkaller-00048-gde5c208d533a #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:27112 pid:18010 ppid: 3636 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5146 [inline]
__schedule+0xa00/0x4b50 kernel/sched/core.c:6458
schedule+0xd2/0x1f0 kernel/sched/core.c:6530
wb_wait_for_completion+0x17e/0x240 fs/fs-writeback.c:191
__writeback_inodes_sb_nr+0x1d7/0x280 fs/fs-writeback.c:2607
try_to_writeback_inodes_sb+0x94/0xc0 fs/fs-writeback.c:2655
ext4_nonda_switch+0x1aa/0x1f0 fs/ext4/inode.c:2932
ext4_da_write_begin+0x16e/0xaf0 fs/ext4/inode.c:2959
generic_perform_write+0x244/0x560 mm/filemap.c:3770
ext4_buffered_write_iter+0x15b/0x330 fs/ext4/file.c:270
ext4_file_write_iter+0x43c/0x1520 fs/ext4/file.c:679
call_write_iter include/linux/fs.h:2058 [inline]
new_sync_write+0x38a/0x560 fs/read_write.c:504
vfs_write+0x7c0/0xac0 fs/read_write.c:591
ksys_write+0x127/0x250 fs/read_write.c:644
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7f6fea889109
RSP: 002b:00007f6feb97d168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f6fea99bf60 RCX: 00007f6fea889109
RDX: 00000000fffffc41 RSI: 0000000020001440 RDI: 0000000000000003
RBP: 00007f6fea8e305d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe7f54ddaf R14: 00007f6feb97d300 R15: 0000000000022000
INFO: task syz-executor.5:18012 blocked for more than 143 seconds.
Not tainted 5.19.0-rc3-syzkaller-00048-gde5c208d533a #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:27112 pid:18012 ppid: 3634 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5146 [inline]
__schedule+0xa00/0x4b50 kernel/sched/core.c:6458
schedule+0xd2/0x1f0 kernel/sched/core.c:6530
wb_wait_for_completion+0x17e/0x240 fs/fs-writeback.c:191
__writeback_inodes_sb_nr+0x1d7/0x280 fs/fs-writeback.c:2607
try_to_writeback_inodes_sb+0x94/0xc0 fs/fs-writeback.c:2655
ext4_nonda_switch+0x1aa/0x1f0 fs/ext4/inode.c:2932
ext4_da_write_begin+0x16e/0xaf0 fs/ext4/inode.c:2959
generic_perform_write+0x244/0x560 mm/filemap.c:3770
ext4_buffered_write_iter+0x15b/0x330 fs/ext4/file.c:270
ext4_file_write_iter+0x43c/0x1520 fs/ext4/file.c:679
call_write_iter include/linux/fs.h:2058 [inline]
new_sync_write+0x38a/0x560 fs/read_write.c:504
vfs_write+0x7c0/0xac0 fs/read_write.c:591
ksys_write+0x127/0x250 fs/read_write.c:644
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7f1bd8889109
RSP: 002b:00007f1bd9a36168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f1bd899bf60 RCX: 00007f1bd8889109
RDX: 00000000fffffc41 RSI: 0000000020001440 RDI: 0000000000000003
RBP: 00007f1bd88e305d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe9e89678f R14: 00007f1bd9a36300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by pr/ttyS0/16:
1 lock held by khungtaskd/29:
#0: ffffffff8bd86ba0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6491
2 locks held by getty/3291:
#0: ffff8880265fc098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc90002d232e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xe50/0x13c0 drivers/tty/n_tty.c:2124
1 lock held by syz-executor.0/3633:
#0: ffff88814ac1a460 (sb_writers#4){.+.+}-{0:0}, at: do_unlinkat+0x17f/0x650 fs/namei.c:4239
3 locks held by kworker/u4:7/3719:
4 locks held by syz-executor.2/18010:
#0: ffff88801c7a2868 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe3/0x100 fs/file.c:1036
#1: ffff88814ac1a460 (sb_writers#4){.+.+}-{0:0}, at: ksys_write+0x127/0x250 fs/read_write.c:644
#2: ffff88803032ac20 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:741 [inline]
#2: ffff88803032ac20 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x330 fs/ext4/file.c:264
#3: ffff88814ac1a0e0 (&type->s_umount_key#32){++++}-{3:3}, at: try_to_writeback_inodes_sb+0x1d/0xc0 fs/fs-writeback.c:2652
4 locks held by syz-executor.5/18012:
#0: ffff888084a625e8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe3/0x100 fs/file.c:1036
#1: ffff88814ac1a460 (sb_writers#4){.+.+}-{0:0}, at: ksys_write+0x127/0x250 fs/read_write.c:644
#2: ffff888032690e08 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:741 [inline]
#2: ffff888032690e08 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x330 fs/ext4/file.c:264
#3: ffff88814ac1a0e0 (&type->s_umount_key#32){++++}-{3:3}, at: try_to_writeback_inodes_sb+0x1d/0xc0 fs/fs-writeback.c:2652
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 5.19.0-rc3-syzkaller-00048-gde5c208d533a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1e6/0x230 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xc22/0xf90 kernel/hung_task.c:378
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 2960 Comm: syslogd Not tainted 5.19.0-rc3-syzkaller-00048-gde5c208d533a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:vfs_read+0x2/0x5d0 fs/read_write.c:463
Code: ff 84 d2 0f 84 63 ff ff ff e8 aa 11 f2 ff e9 59 ff ff ff 4c 89 f7 e8 ad 11 f2 ff e9 a0 fe ff ff 0f 1f 84 00 00 00 00 00 41 57 <41> 56 41 55 49 89 cd 41 54 55 48 89 d5 53 48 89 fb 4c 8d 73 7c 48
RSP: 0018:ffffc90002d3fe98 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff888022294f00 RCX: 0000000000000000
RDX: 00000000000000ff RSI: 00005562a589a950 RDI: ffff888022294f00
RBP: ffff888022294f00 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000200000 R11: 0000000000000001 R12: 1ffff920005a7fd5
R13: 00005562a589a950 R14: 0000000000200000 R15: 00000000000000ff
FS: 00007f7705862800(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c010c898f0 CR3: 000000007e407000 CR4: 0000000000350ef0
Call Trace:
ksys_read+0x1e8/0x250 fs/read_write.c:620
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7f77059ee8fe
Code: c0 e9 e6 fe ff ff 50 48 8d 3d 0e c7 09 00 e8 c9 cf 01 00 66 0f 1f 84 00 00 00 00 00 64 8b 04 25 18 00 00 00 85 c0 75 14 0f 05 <48> 3d 00 f0 ff ff 77 5a c3 66 0f 1f 84 00 00 00 00 00 48 83 ec 28
RSP: 002b:00007ffe31947258 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f77059ee8fe
RDX: 00000000000000ff RSI: 00005562a589a950 RDI: 0000000000000000
RBP: 00005562a589a910 R08: 00007f7705a7e040 R09: 00007f7705a7e0c0
R10: 00007f7705a7dfc0 R11: 0000000000000246 R12: 00005562a589a9a4
R13: 00005562a589a950 R14: 0000000000000000 R15: 0000000000000000
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 84 d2 test %dl,%dl
2: 0f 84 63 ff ff ff je 0xffffff6b
8: e8 aa 11 f2 ff callq 0xfff211b7
d: e9 59 ff ff ff jmpq 0xffffff6b
12: 4c 89 f7 mov %r14,%rdi
15: e8 ad 11 f2 ff callq 0xfff211c7
1a: e9 a0 fe ff ff jmpq 0xfffffebf
1f: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1)
26: 00
27: 41 57 push %r15
* 29: 41 56 push %r14 <-- trapping instruction
2b: 41 55 push %r13
2d: 49 89 cd mov %rcx,%r13
30: 41 54 push %r12
32: 55 push %rbp
33: 48 89 d5 mov %rdx,%rbp
36: 53 push %rbx
37: 48 89 fb mov %rdi,%rbx
3a: 4c 8d 73 7c lea 0x7c(%rbx),%r14
3e: 48 rex.W