INFO: task syz-executor.1:23159 blocked for more than 143 seconds.
Not tainted 6.3.0-syzkaller-00436-g173ea743bf7a #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:24552 pid:23159 ppid:5007 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5307 [inline]
__schedule+0x173b/0x4630 kernel/sched/core.c:6625
schedule+0xc3/0x180 kernel/sched/core.c:6701
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6760
rwsem_down_write_slowpath+0xedd/0x13a0 kernel/locking/rwsem.c:1178
__down_write_common+0x1aa/0x200 kernel/locking/rwsem.c:1306
inode_lock include/linux/fs.h:758 [inline]
ext4_buffered_write_iter+0xaf/0x3a0 fs/ext4/file.c:283
ext4_file_write_iter+0x1d6/0x1930
call_write_iter include/linux/fs.h:1851 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x7da/0xbf0 fs/read_write.c:584
ksys_write+0x1a0/0x2c0 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f148b48c169
RSP: 002b:00007f148c127168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f148b5ac050 RCX: 00007f148b48c169
RDX: 000000006db6e571 RSI: 0000000020000000 RDI: 0000000000000004
RBP: 00007f148b4e7ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc18edcfff R14: 00007f148c127300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/13:
#0: ffffffff8cf256b0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:518
1 lock held by rcu_tasks_trace/14:
#0: ffffffff8cf25a70 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:518
1 lock held by khungtaskd/28:
#0: ffffffff8cf254e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/4734:
#0: ffff88814a0b1098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc900015b02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ab/0x1db0 drivers/tty/n_tty.c:2177
3 locks held by syz-fuzzer/4998:
#0: ffff88814b3d2460 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:394
#1: ffff88803df0b628 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:793 [inline]
#1: ffff88803df0b628 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: do_unlinkat+0x264/0x940 fs/namei.c:4301
#2: ffff88808a9b7258 (&sb->s_type->i_mutex_key#7){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#2: ffff88808a9b7258 (&sb->s_type->i_mutex_key#7){++++}-{3:3}, at: vfs_unlink+0xe4/0x5f0 fs/namei.c:4239
4 locks held by syz-executor.1/23158:
3 locks held by syz-executor.1/23159:
#0: ffff88802237e5e8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x254/0x2f0 fs/file.c:1047
#1: ffff88814b3d2460 (sb_writers#4){.+.+}-{0:0}, at: vfs_write+0x27e/0xbf0 fs/read_write.c:580
#2: ffff88808a9b7258 (&sb->s_type->i_mutex_key#7){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#2: ffff88808a9b7258 (&sb->s_type->i_mutex_key#7){++++}-{3:3}, at: ext4_buffered_write_iter+0xaf/0x3a0 fs/ext4/file.c:283
4 locks held by syz-executor.4/23278:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.3.0-syzkaller-00436-g173ea743bf7a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x498/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x187/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xec2/0xf00 kernel/hung_task.c:379
kthread+0x2b2/0x350 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 23278 Comm: syz-executor.4 Not tainted 6.3.0-syzkaller-00436-g173ea743bf7a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x17/0x60 kernel/kcov.c:207
Code: 48 8b 3d e4 bd c8 0c 48 89 de 5b e9 f3 ea 54 00 0f 1f 00 f3 0f 1e fa 48 8b 04 24 65 48 8b 0d 70 19 79 7e 65 8b 15 71 19 79 7e c2 00 01 ff 00 74 11 f7 c2 00 01 00 00 74 35 83 b9 74 15 00 00
RSP: 0018:ffffc9000b7a60f0 EFLAGS: 00000046
RAX: ffffffff81c49193 RBX: dffffc0000000000 RCX: ffff88801eb357c0
RDX: 0000000080000001 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff81c4917f R09: fffff94000549a81
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffffd4000549a80
R13: ffffea0002a4d400 R14: ffffea0002a4d408 R15: 0000000000000000
FS: 00007f4320537700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c025e991c0 CR3: 000000002039a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
arch_static_branch arch/x86/include/asm/jump_label.h:27 [inline]
page_fixed_fake_head include/linux/page-flags.h:214 [inline]
page_is_fake_head include/linux/page-flags.h:246 [inline]
PageTail include/linux/page-flags.h:290 [inline]
folio_flags include/linux/page-flags.h:317 [inline]
folio_test_swapbacked include/linux/page-flags.h:500 [inline]
folio_test_swapcache include/linux/page-flags.h:542 [inline]
folio_mapping+0xf3/0x560 mm/util.c:771
folio_evictable+0xa4/0x2e0 mm/internal.h:156
move_folios_to_lru+0x329/0x2390 mm/vmscan.c:2423
shrink_inactive_list mm/vmscan.c:2539 [inline]
shrink_list mm/vmscan.c:2777 [inline]
shrink_lruvec+0x16fe/0x2d30 mm/vmscan.c:6250
shrink_node_memcgs mm/vmscan.c:6437 [inline]
shrink_node+0x10d8/0x2730 mm/vmscan.c:6473
shrink_zones mm/vmscan.c:6711 [inline]
do_try_to_free_pages+0x67e/0x1900 mm/vmscan.c:6773
try_to_free_mem_cgroup_pages+0x455/0xa50 mm/vmscan.c:7088
try_charge_memcg+0x5de/0x16d0 mm/memcontrol.c:2695
try_charge mm/memcontrol.c:2837 [inline]
charge_memcg+0x11a/0x3f0 mm/memcontrol.c:6960
__mem_cgroup_charge+0x27/0x80 mm/memcontrol.c:6981
mem_cgroup_charge include/linux/memcontrol.h:678 [inline]
__filemap_add_folio+0xe78/0x1b50 mm/filemap.c:857
filemap_add_folio+0x121/0x580 mm/filemap.c:939
page_cache_ra_unbounded+0x210/0x7c0 mm/readahead.c:251
do_sync_mmap_readahead+0x7b2/0x990 mm/filemap.c:3190
filemap_fault+0x817/0x1800 mm/filemap.c:3282
__do_fault+0x136/0x500 mm/memory.c:4155
do_read_fault mm/memory.c:4506 [inline]
do_fault mm/memory.c:4635 [inline]
handle_pte_fault mm/memory.c:4923 [inline]
__handle_mm_fault mm/memory.c:5065 [inline]
handle_mm_fault+0x3357/0x51c0 mm/memory.c:5211
do_user_addr_fault arch/x86/mm/fault.c:1407 [inline]
handle_page_fault arch/x86/mm/fault.c:1498 [inline]
exc_page_fault+0x5b1/0x7c0 arch/x86/mm/fault.c:1554
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0010:fault_in_readable+0x16a/0x350 mm/gup.c:1856
Code: 00 00 00 0f 01 cb 0f ae e8 49 81 e6 ff 0f 00 00 31 ff 4c 89 f6 e8 76 fb c0 ff 48 8b 4c 24 08 48 89 c8 48 25 ff 0f 00 00 74 30 <8a> 19 e8 1f f7 c0 ff 43 0f b6 04 2f 84 c0 0f 85 83 01 00 00 88 5c
RSP: 0018:ffffc9000b7a7880 EFLAGS: 00050206
RAX: 0000000000000200 RBX: 00007fffffffe000 RCX: 0000000020046200
RDX: ffffc9000defc000 RSI: 0000000000000200 RDI: 0000000000000000
RBP: ffffc9000b7a7938 R08: ffffffff81c9a3ca R09: ffffffff842e2ff9
R10: 0000000000000002 R11: ffff88801eb357c0 R12: 0000000000001000
R13: dffffc0000000000 R14: 0000000000000200 R15: 1ffff920016f4f18
fault_in_iov_iter_readable+0xdf/0x280 lib/iov_iter.c:350
generic_perform_write+0x458/0x5e0 mm/filemap.c:3916
ext4_buffered_write_iter+0x122/0x3a0 fs/ext4/file.c:289
ext4_file_write_iter+0x1d6/0x1930
call_write_iter include/linux/fs.h:1851 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x7da/0xbf0 fs/read_write.c:584
ksys_write+0x1a0/0x2c0 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f431f88c169
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f4320537168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f431f9ac050 RCX: 00007f431f88c169
RDX: 000000006db6e571 RSI: 0000000020000200 RDI: 0000000000000004
RBP: 00007f431f8e7ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd8da110ff R14: 00007f4320537300 R15: 0000000000022000