INFO: task syz-executor.2:2563 blocked for more than 143 seconds.
Not tainted 5.16.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:26824 pid: 2563 ppid: 29335 flags:0x20004004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
blk_mq_freeze_queue_wait+0x112/0x160 block/blk-mq.c:178
loop_set_status+0x440/0x930 drivers/block/loop.c:1264
loop_set_status_compat+0xac/0x100 drivers/block/loop.c:1674
lo_compat_ioctl+0xeb/0x110 drivers/block/loop.c:1700
compat_blkdev_ioctl+0x3b8/0x810 block/ioctl.c:674
__do_compat_sys_ioctl+0x1c7/0x290 fs/ioctl.c:972
do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
__do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178
do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203
entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf6e65549
RSP: 002b:00000000f445f5fc EFLAGS: 00000296 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000004c02
RDX: 0000000020000940 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
INFO: task syz-executor.2:2566 blocked for more than 143 seconds.
Not tainted 5.16.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:26128 pid: 2566 ppid: 29335 flags:0x20004004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
__bio_queue_enter+0x3c5/0x6a0 block/blk-core.c:441
bio_queue_enter block/blk.h:91 [inline]
blk_mq_get_request block/blk-mq.c:2588 [inline]
blk_mq_submit_bio+0x4ae/0x22c0 block/blk-mq.c:2632
__submit_bio block/blk-core.c:849 [inline]
__submit_bio_noacct_mq block/blk-core.c:924 [inline]
submit_bio_noacct block/blk-core.c:950 [inline]
submit_bio_noacct+0x82c/0xa20 block/blk-core.c:939
submit_bio block/blk-core.c:1011 [inline]
submit_bio+0x1ea/0x430 block/blk-core.c:969
submit_bh_wbc+0x5e8/0x7e0 fs/buffer.c:3054
submit_bh fs/buffer.c:3060 [inline]
block_read_full_page+0xa25/0xda0 fs/buffer.c:2339
filemap_read_page+0x152/0x420 mm/filemap.c:2391
filemap_update_page mm/filemap.c:2470 [inline]
filemap_get_pages+0x14a2/0x1be0 mm/filemap.c:2579
filemap_read+0x315/0xeb0 mm/filemap.c:2642
generic_file_read_iter+0x3b6/0x5a0 mm/filemap.c:2792
blkdev_read_iter+0xf8/0x1d0 block/fops.c:583
call_read_iter include/linux/fs.h:2156 [inline]
generic_file_splice_read+0x453/0x6d0 fs/splice.c:311
do_splice_to+0x1bf/0x250 fs/splice.c:796
splice_direct_to_actor+0x2c2/0x8c0 fs/splice.c:870
do_splice_direct+0x1b3/0x280 fs/splice.c:979
do_sendfile+0xaf2/0x1250 fs/read_write.c:1245
__do_compat_sys_sendfile fs/read_write.c:1331 [inline]
__se_compat_sys_sendfile fs/read_write.c:1314 [inline]
__ia32_compat_sys_sendfile+0x1dd/0x220 fs/read_write.c:1314
do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
__do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178
do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203
entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf6e65549
RSP: 002b:00000000f443e5fc EFLAGS: 00000296 ORIG_RAX: 00000000000000bb
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000000005
RDX: 0000000000000000 RSI: 0000000024002da8 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
INFO: task syz-executor.4:2602 blocked for more than 144 seconds.
Not tainted 5.16.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:27128 pid: 2602 ppid: 7058 flags:0x20004004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
blkdev_get_by_dev.part.0+0x9b/0xb50 block/bdev.c:819
blkdev_get_by_dev+0x6b/0x80 block/bdev.c:859
blkdev_open+0x154/0x2e0 block/fops.c:501
do_dentry_open+0x4c8/0x1250 fs/open.c:822
do_open fs/namei.c:3426 [inline]
path_openat+0x1cad/0x2750 fs/namei.c:3559
do_filp_open+0x1aa/0x400 fs/namei.c:3586
do_sys_openat2+0x16d/0x4d0 fs/open.c:1212
do_sys_open fs/open.c:1228 [inline]
__do_compat_sys_openat fs/open.c:1288 [inline]
__se_compat_sys_openat fs/open.c:1286 [inline]
__ia32_compat_sys_openat+0x13f/0x1f0 fs/open.c:1286
do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
__do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178
do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203
entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf6f5e549
RSP: 002b:00000000f45581a0 EFLAGS: 00000282 ORIG_RAX: 0000000000000127
RAX: ffffffffffffffda RBX: 00000000ffffff9c RCX: 00000000f45581f0
RDX: 0000000000103302 RSI: 0000000000000000 RDI: 00000000f7094000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
INFO: task syz-executor.5:2599 blocked for more than 144 seconds.
Not tainted 5.16.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:28464 pid: 2599 ppid: 8055 flags:0x20000004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
blkdev_get_by_dev.part.0+0x9b/0xb50 block/bdev.c:819
blkdev_get_by_dev+0x6b/0x80 block/bdev.c:859
blkdev_open+0x154/0x2e0 block/fops.c:501
do_dentry_open+0x4c8/0x1250 fs/open.c:822
do_open fs/namei.c:3426 [inline]
path_openat+0x1cad/0x2750 fs/namei.c:3559
do_filp_open+0x1aa/0x400 fs/namei.c:3586
do_sys_openat2+0x16d/0x4d0 fs/open.c:1212
do_sys_open fs/open.c:1228 [inline]
__do_compat_sys_openat fs/open.c:1288 [inline]
__se_compat_sys_openat fs/open.c:1286 [inline]
__ia32_compat_sys_openat+0x13f/0x1f0 fs/open.c:1286
do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
__do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178
do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203
entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf6ea8549
RSP: 002b:00000000f44a21a0 EFLAGS: 00000282 ORIG_RAX: 0000000000000127
RAX: ffffffffffffffda RBX: 00000000ffffff9c RCX: 00000000f44a21f0
RDX: 0000000000103302 RSI: 0000000000000000 RDI: 00000000f6fde000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
INFO: task syz-executor.3:2603 blocked for more than 144 seconds.
Not tainted 5.16.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:27160 pid: 2603 ppid: 6768 flags:0x20004004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
blkdev_get_by_dev.part.0+0x9b/0xb50 block/bdev.c:819
blkdev_get_by_dev+0x6b/0x80 block/bdev.c:859
blkdev_open+0x154/0x2e0 block/fops.c:501
do_dentry_open+0x4c8/0x1250 fs/open.c:822
do_open fs/namei.c:3426 [inline]
path_openat+0x1cad/0x2750 fs/namei.c:3559
do_filp_open+0x1aa/0x400 fs/namei.c:3586
do_sys_openat2+0x16d/0x4d0 fs/open.c:1212
do_sys_open fs/open.c:1228 [inline]
__do_compat_sys_openat fs/open.c:1288 [inline]
__se_compat_sys_openat fs/open.c:1286 [inline]
__ia32_compat_sys_openat+0x13f/0x1f0 fs/open.c:1286
do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
__do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178
do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203
entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf6f62549
RSP: 002b:00000000f455c1a0 EFLAGS: 00000282 ORIG_RAX: 0000000000000127
RAX: ffffffffffffffda RBX: 00000000ffffff9c RCX: 00000000f455c1f0
RDX: 0000000000103302 RSI: 0000000000000000 RDI: 00000000f7098000
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/26:
#0: ffffffff8bb83ae0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
2 locks held by systemd-udevd/2976:
#0: ffff88801aa2b118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x9b/0xb50 block/bdev.c:819
#1: ffff88801a95eb60 (&lo->lo_mutex){+.+.}-{3:3}, at: lo_open+0x75/0x120 drivers/block/loop.c:1733
1 lock held by in:imklog/6220:
#0: ffff88801cbf54f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
2 locks held by agetty/6383:
#0: ffff88801c86b098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:252
#1: ffffc900029082e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2113
2 locks held by kworker/u4:2/20710:
1 lock held by syz-executor.2/2563:
#0: ffff88801a95eb60 (&lo->lo_mutex){+.+.}-{3:3}, at: loop_set_status+0x2a/0x930 drivers/block/loop.c:1248
1 lock held by syz-executor.2/2566:
#0: ffff88801102b888 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:838 [inline]
#0: ffff88801102b888 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_update_page mm/filemap.c:2441 [inline]
#0: ffff88801102b888 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_get_pages+0x10f7/0x1be0 mm/filemap.c:2579
1 lock held by syz-executor.4/2602:
#0: ffff88801aa2b118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x9b/0xb50 block/bdev.c:819
1 lock held by syz-executor.5/2599:
#0: ffff88801aa2b118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x9b/0xb50 block/bdev.c:819
1 lock held by syz-executor.3/2603:
#0: ffff88801aa2b118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x9b/0xb50 block/bdev.c:819
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 26 Comm: khungtaskd Not tainted 5.16.0-rc1-syzkaller #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:105
nmi_trigger_cpumask_backtrace+0x1ae/0x220 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
watchdog+0xc1d/0xf50 kernel/hung_task.c:295
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 25013 Comm: kworker/1:3 Not tainted 5.16.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events nsim_dev_trap_report_work
RIP: 0010:rcu_is_watching+0x78/0xb0 kernel/rcu/tree.c:1124
Code: 89 da 48 c1 ea 03 0f b6 14 02 48 89 d8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 19 8b 03 83 e0 01 65 ff 0d 5b 23 9f 7e 74 03 5b <5d> c3 e8 90 f8 9c ff 5b 5d c3 48 89 df e8 e6 52 5b 00 eb dd e8 ef
RSP: 0018:ffffc9000a7f7b68 EFLAGS: 00000286
RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff815cfc31
RDX: 0000000000000000 RSI: 0000000000000204 RDI: ffffffff8b5648a8
RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8d917357
R10: fffffbfff1b22e6a R11: 000000004ed073c7 R12: 0000000000000001
R13: ffff888032f8cdc0 R14: ffff88802f50a500 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5ccabd9000 CR3: 000000000b88e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rcu_read_lock_held_common kernel/rcu/update.c:108 [inline]
rcu_read_lock_sched_held+0x1c/0x70 kernel/rcu/update.c:123
trace_lock_release include/trace/events/lock.h:58 [inline]
lock_release+0x522/0x720 kernel/locking/lockdep.c:5648
__raw_spin_unlock_bh include/linux/spinlock_api_smp.h:165 [inline]
_raw_spin_unlock_bh+0x12/0x30 kernel/locking/spinlock.c:210
spin_unlock_bh include/linux/spinlock.h:394 [inline]
nsim_dev_trap_report drivers/net/netdevsim/dev.c:817 [inline]
nsim_dev_trap_report_work+0x855/0xbc0 drivers/net/netdevsim/dev.c:843
process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298
worker_thread+0x658/0x11f0 kernel/workqueue.c:2445
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess):
0: 89 da mov %ebx,%edx
2: 48 c1 ea 03 shr $0x3,%rdx
6: 0f b6 14 02 movzbl (%rdx,%rax,1),%edx
a: 48 89 d8 mov %rbx,%rax
d: 83 e0 07 and $0x7,%eax
10: 83 c0 03 add $0x3,%eax
13: 38 d0 cmp %dl,%al
15: 7c 04 jl 0x1b
17: 84 d2 test %dl,%dl
19: 75 19 jne 0x34
1b: 8b 03 mov (%rbx),%eax
1d: 83 e0 01 and $0x1,%eax
20: 65 ff 0d 5b 23 9f 7e decl %gs:0x7e9f235b(%rip) # 0x7e9f2382
27: 74 03 je 0x2c
29: 5b pop %rbx
* 2a: 5d pop %rbp <-- trapping instruction
2b: c3 retq
2c: e8 90 f8 9c ff callq 0xff9cf8c1
31: 5b pop %rbx
32: 5d pop %rbp
33: c3 retq
34: 48 89 df mov %rbx,%rdi
37: e8 e6 52 5b 00 callq 0x5b5322
3c: eb dd jmp 0x1b
3e: e8 .byte 0xe8
3f: ef out %eax,(%dx)