INFO: task syz-executor.3:12945 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.3 state:D stack:25464 pid:12945 ppid: 8415 flags:0x00004004
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
__block_write_full_page+0x875/0x1350 fs/buffer.c:1809
block_write_full_page+0x14d/0x190 fs/buffer.c:2980
__writepage+0x60/0x180 mm/page-writeback.c:2320
write_cache_pages+0x6f4/0x10c0 mm/page-writeback.c:2255
generic_writepages mm/page-writeback.c:2346 [inline]
generic_writepages+0xe2/0x150 mm/page-writeback.c:2335
do_writepages+0x1ab/0x690 mm/page-writeback.c:2364
filemap_fdatawrite_wbc mm/filemap.c:407 [inline]
filemap_fdatawrite_wbc+0x143/0x1b0 mm/filemap.c:397
__filemap_fdatawrite_range mm/filemap.c:440 [inline]
file_write_and_wait_range+0x163/0x1e0 mm/filemap.c:824
blkdev_fsync+0x4a/0xa0 block/fops.c:465
vfs_fsync_range+0x13a/0x220 fs/sync.c:182
generic_write_sync include/linux/fs.h:2956 [inline]
blkdev_write_iter+0x552/0x690 block/fops.c:559
call_write_iter include/linux/fs.h:2162 [inline]
do_iter_readv_writev+0x472/0x750 fs/read_write.c:725
do_iter_write+0x188/0x710 fs/read_write.c:851
vfs_iter_write+0x70/0xa0 fs/read_write.c:892
iter_file_splice_write+0x723/0xc70 fs/splice.c:689
do_splice_from fs/splice.c:767 [inline]
direct_splice_actor+0x110/0x180 fs/splice.c:936
splice_direct_to_actor+0x34b/0x8c0 fs/splice.c:891
do_splice_direct+0x1b3/0x280 fs/splice.c:979
do_sendfile+0xaf2/0x1250 fs/read_write.c:1245
__do_sys_sendfile64 fs/read_write.c:1310 [inline]
__se_sys_sendfile64 fs/read_write.c:1296 [inline]
__x64_sys_sendfile64+0x1cc/0x210 fs/read_write.c:1296
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+0x44/0xae
RIP: 0033:0x7f26333a4ae9
RSP: 002b:00007f263091a188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f26334b7f60 RCX: 00007f26333a4ae9
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000004
RBP: 00007f26333fef6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000024002da8 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f26339ebb2f R14: 00007f263091a300 R15: 0000000000022000
INFO: task syz-executor.3:12957 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:27968 pid:12957 ppid: 8415 flags:0x00000004
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+0x17d/0x930 drivers/block/loop.c:1264
loop_set_status_old+0x148/0x1b0 drivers/block/loop.c:1396
lo_ioctl+0x3e9/0x17c0 drivers/block/loop.c:1566
blkdev_ioctl+0x37a/0x800 block/ioctl.c:609
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl fs/ioctl.c:860 [inline]
__x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860
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+0x44/0xae
RIP: 0033:0x7f26333a4ae9
RSP: 002b:00007f26308f9188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f26334b8020 RCX: 00007f26333a4ae9
RDX: 0000000020000780 RSI: 0000000000004c02 RDI: 0000000000000004
RBP: 00007f26333fef6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f26339ebb2f R14: 00007f26308f9300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8bb83ae0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
3 locks held by kworker/u4:4/302:
#0: ffff888142d9c138 ((wq_completion)writeback){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888142d9c138 ((wq_completion)writeback){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888142d9c138 ((wq_completion)writeback){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline]
#0: ffff888142d9c138 ((wq_completion)writeback){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:635 [inline]
#0: ffff888142d9c138 ((wq_completion)writeback){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline]
#0: ffff888142d9c138 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x896/0x1690 kernel/workqueue.c:2269
#1: ffffc90002c3fdb0 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x8ca/0x1690 kernel/workqueue.c:2273
#2: ffff888010e620e0 (&type->s_umount_key#48){.+.+}-{3:3}, at: trylock_super+0x1d/0x100 fs/super.c:418
2 locks held by systemd-udevd/2970:
#0: ffff88801a73e918 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x9b/0xb50 block/bdev.c:819
#1: ffff88801a73a360 (&lo->lo_mutex){+.+.}-{3:3}, at: lo_open+0x75/0x120 drivers/block/loop.c:1733
1 lock held by in:imklog/6307:
#0: ffff888072164370 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
1 lock held by syz-executor.3/12957:
#0: ffff88801a73a360 (&lo->lo_mutex){+.+.}-{3:3}, at: loop_set_status+0x2a/0x930 drivers/block/loop.c:1248
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4950 Comm: kworker/u4:3 Not tainted 5.16.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: phy5 ieee80211_iface_work
RIP: 0010:get_freepointer mm/slub.c:352 [inline]
RIP: 0010:slab_free_freelist_hook+0x5f/0x1c0 mm/slub.c:1746
Code: ff 1f 00 0f 96 c0 48 85 d2 41 0f 95 c0 41 20 c0 0f 85 10 01 00 00 48 c7 06 00 00 00 00 48 89 f3 49 c7 06 00 00 00 00 8b 45 28 <4d> 89 e7 4d 8b 24 04 66 90 8b 75 1c 4c 89 ff e8 3d 98 9e ff f6 45
RSP: 0018:ffffc90006db7bb0 EFLAGS: 00000246
RAX: 0000000000000070 RBX: ffffc90006db7c28 RCX: ffffc90006db7c24
RDX: ffff88823bc00000 RSI: ffffc90006db7c28 RDI: ffff8881447bd640
RBP: ffff8881447bd640 R08: 0000000000000000 R09: 000000000000002e
R10: ffffffff81352e7a R11: 000000000000003f R12: ffff88801a1a23c0
R13: ffff88801a1a23c0 R14: ffffc90006db7c30 R15: ffff888075861810
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f240568d000 CR3: 000000007232a000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 000000000000a000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
slab_free mm/slub.c:3513 [inline]
kmem_cache_free+0x92/0x5e0 mm/slub.c:3529
kfree_skbmem+0xef/0x1b0 net/core/skbuff.c:700
__kfree_skb net/core/skbuff.c:757 [inline]
kfree_skb net/core/skbuff.c:774 [inline]
kfree_skb+0x140/0x3f0 net/core/skbuff.c:768
ieee80211_iface_work+0x411/0xd00 net/mac80211/iface.c:1522
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: ff 1f lcall *(%rdi)
2: 00 0f add %cl,(%rdi)
4: 96 xchg %eax,%esi
5: c0 48 85 d2 rorb $0xd2,-0x7b(%rax)
9: 41 0f 95 c0 setne %r8b
d: 41 20 c0 and %al,%r8b
10: 0f 85 10 01 00 00 jne 0x126
16: 48 c7 06 00 00 00 00 movq $0x0,(%rsi)
1d: 48 89 f3 mov %rsi,%rbx
20: 49 c7 06 00 00 00 00 movq $0x0,(%r14)
27: 8b 45 28 mov 0x28(%rbp),%eax
* 2a: 4d 89 e7 mov %r12,%r15 <-- trapping instruction
2d: 4d 8b 24 04 mov (%r12,%rax,1),%r12
31: 66 90 xchg %ax,%ax
33: 8b 75 1c mov 0x1c(%rbp),%esi
36: 4c 89 ff mov %r15,%rdi
39: e8 3d 98 9e ff callq 0xff9e987b
3e: f6 .byte 0xf6
3f: 45 rex.RB