INFO: task syz-executor.3:9394 blocked for more than 143 seconds.
Not tainted 5.16.0-rc4-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:27024 pid: 9394 ppid: 8515 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
io_schedule+0xee/0x170 kernel/sched/core.c:8371
folio_wait_bit_common+0x4f2/0xa60 mm/filemap.c:1371
lock_page include/linux/pagemap.h:796 [inline]
truncate_inode_pages_range+0x6d6/0x1020 mm/truncate.c:404
kill_bdev block/bdev.c:78 [inline]
set_blocksize+0x2bd/0x370 block/bdev.c:158
sb_set_blocksize block/bdev.c:167 [inline]
sb_min_blocksize+0xc8/0x1c0 block/bdev.c:183
befs_fill_super+0x689/0x10a0 fs/befs/linuxvfs.c:848
mount_bdev+0x34d/0x410 fs/super.c:1370
legacy_get_tree+0x105/0x220 fs/fs_context.c:610
vfs_get_tree+0x89/0x2f0 fs/super.c:1500
do_new_mount fs/namespace.c:2988 [inline]
path_mount+0x1320/0x1fa0 fs/namespace.c:3318
do_mount fs/namespace.c:3331 [inline]
__do_sys_mount fs/namespace.c:3539 [inline]
__se_sys_mount fs/namespace.c:3516 [inline]
__x64_sys_mount+0x27f/0x300 fs/namespace.c:3516
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: 0033:0x7f2020b47af9
RSP: 002b:00007f201fabd188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f2020c5af60 RCX: 00007f2020b47af9
RDX: 00000000200001c0 RSI: 0000000020000180 RDI: 0000000020000140
RBP: 00007f2020ba1ff7 R08: 0000000020000200 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffcea9ca5f R14: 00007f201fabd300 R15: 0000000000022000
</TASK>
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8bb811a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
4 locks held by kworker/u4:2/44:
2 locks held by kworker/u4:3/54:
1 lock held by kswapd0/98:
1 lock held by kswapd1/99:
1 lock held by systemd-journal/2970:
#0: ffffffff8bca3720 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:4585 [inline]
#0: ffffffff8bca3720 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim mm/page_alloc.c:4609 [inline]
#0: ffffffff8bca3720 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_slowpath.constprop.0+0xa1e/0x20d0 mm/page_alloc.c:5007
2 locks held by in:imklog/6217:
#0: ffff8880258873f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:994
#1: ffffffff8bca3720 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:4585 [inline]
#1: ffffffff8bca3720 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim mm/page_alloc.c:4609 [inline]
#1: ffffffff8bca3720 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_slowpath.constprop.0+0xa1e/0x20d0 mm/page_alloc.c:5007
1 lock held by cron/6219:
#0: ffff8880205546f0 (&type->i_mutex_dir_key#4){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:793 [inline]
#0: ffff8880205546f0 (&type->i_mutex_dir_key#4){++++}-{3:3}, at: lookup_slow fs/namei.c:1673 [inline]
#0: ffff8880205546f0 (&type->i_mutex_dir_key#4){++++}-{3:3}, at: walk_component+0x400/0x6a0 fs/namei.c:1970
1 lock held by syz-fuzzer/6535:
1 lock held by syz-fuzzer/6553:
3 locks held by kworker/1:4/8183:
3 locks held by kworker/0:5/8202:
1 lock held by syz-executor.3/9394:
#0: ffff8880828740e0 (&type->s_umount_key#72/1){+.+.}-{3:3}, at: alloc_super+0x1dd/0xac0 fs/super.c:229
1 lock held by syz-executor.1/9391:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.16.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
<TASK>
__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+0x1b3/0x230 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
</TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 44 Comm: kworker/u4:2 Not tainted 5.16.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: writeback wb_workfn (flush-8:0)
RIP: 0010:__sanitizer_cov_trace_pc+0x37/0x60 kernel/kcov.c:200
Code: 81 e1 00 01 00 00 65 48 8b 14 25 40 70 02 00 a9 00 01 ff 00 74 0e 85 c9 74 35 8b 82 a4 15 00 00 85 c0 74 2b 8b 82 80 15 00 00 <83> f8 02 75 20 48 8b 8a 88 15 00 00 8b 92 84 15 00 00 48 8b 01 48
RSP: 0018:ffffc90001156450 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff888012fc2240 RSI: ffffffff81a31372 RDI: 0000000000000003
RBP: 0000000000008eff R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff81a313d0 R11: 0000000000000000 R12: 0000000000000000
R13: 00000000fffffffe R14: ffffc90001156600 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555a7fabde78 CR3: 000000000b88e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
shrink_lruvec+0x782/0x2660 mm/vmscan.c:2935
shrink_node_memcgs mm/vmscan.c:3129 [inline]
shrink_node+0x858/0x1eb0 mm/vmscan.c:3252
shrink_zones mm/vmscan.c:3485 [inline]
do_try_to_free_pages+0x4e2/0x1640 mm/vmscan.c:3541
try_to_free_pages+0x29f/0x750 mm/vmscan.c:3776
__perform_reclaim mm/page_alloc.c:4588 [inline]
__alloc_pages_direct_reclaim mm/page_alloc.c:4609 [inline]
__alloc_pages_slowpath.constprop.0+0xac7/0x20d0 mm/page_alloc.c:5007
__alloc_pages+0x412/0x500 mm/page_alloc.c:5382
__alloc_pages_node include/linux/gfp.h:570 [inline]
kmem_getpages mm/slab.c:1377 [inline]
cache_grow_begin+0x75/0x470 mm/slab.c:2593
fallback_alloc+0x1e4/0x2e0 mm/slab.c:3140
__do_cache_alloc mm/slab.c:3282 [inline]
slab_alloc mm/slab.c:3316 [inline]
kmem_cache_alloc+0x367/0x560 mm/slab.c:3507
mempool_alloc+0x146/0x350 mm/mempool.c:392
bvec_alloc+0x16b/0x200 block/bio.c:206
bio_alloc_bioset+0x376/0x4a0 block/bio.c:481
bio_alloc include/linux/bio.h:371 [inline]
io_submit_init_bio fs/ext4/page-io.c:401 [inline]
io_submit_add_bh fs/ext4/page-io.c:425 [inline]
ext4_bio_write_page+0xb1b/0x1f60 fs/ext4/page-io.c:549
mpage_submit_page+0x11e/0x2a0 fs/ext4/inode.c:2095
mpage_process_page_bufs+0x681/0x7a0 fs/ext4/inode.c:2209
mpage_prepare_extent_to_map+0x94f/0xe60 fs/ext4/inode.c:2621
ext4_writepages+0x926/0x3b90 fs/ext4/inode.c:2749
do_writepages+0x1ab/0x690 mm/page-writeback.c:2364
__writeback_single_inode+0x126/0xff0 fs/fs-writeback.c:1616
writeback_sb_inodes+0x53d/0xf30 fs/fs-writeback.c:1881
__writeback_inodes_wb+0xc6/0x280 fs/fs-writeback.c:1951
wb_writeback+0x7f8/0xc30 fs/fs-writeback.c:2056
wb_check_old_data_flush fs/fs-writeback.c:2156 [inline]
wb_do_writeback fs/fs-writeback.c:2209 [inline]
wb_workfn+0x8cf/0x12d0 fs/fs-writeback.c:2238
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
</TASK>
----------------
Code disassembly (best guess):
0: 81 e1 00 01 00 00 and $0x100,%ecx
6: 65 48 8b 14 25 40 70 mov %gs:0x27040,%rdx
d: 02 00
f: a9 00 01 ff 00 test $0xff0100,%eax
14: 74 0e je 0x24
16: 85 c9 test %ecx,%ecx
18: 74 35 je 0x4f
1a: 8b 82 a4 15 00 00 mov 0x15a4(%rdx),%eax
20: 85 c0 test %eax,%eax
22: 74 2b je 0x4f
24: 8b 82 80 15 00 00 mov 0x1580(%rdx),%eax
* 2a: 83 f8 02 cmp $0x2,%eax <-- trapping instruction
2d: 75 20 jne 0x4f
2f: 48 8b 8a 88 15 00 00 mov 0x1588(%rdx),%rcx
36: 8b 92 84 15 00 00 mov 0x1584(%rdx),%edx
3c: 48 8b 01 mov (%rcx),%rax
3f: 48 rex.W