INFO: task kworker/u4:17:4000 blocked for more than 143 seconds.
Not tainted 5.15.138-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:17 state:D stack:24160 pid: 4000 ppid: 2 flags:0x00004000
Workqueue: writeback wb_workfn (flush-7:0)
Call Trace:
context_switch kernel/sched/core.c:5026 [inline]
__schedule+0x12c4/0x45b0 kernel/sched/core.c:6372
schedule+0x11b/0x1f0 kernel/sched/core.c:6455
rwsem_down_write_slowpath+0xebb/0x15c0 kernel/locking/rwsem.c:1157
__down_write_common kernel/locking/rwsem.c:1284 [inline]
__down_write kernel/locking/rwsem.c:1293 [inline]
down_write+0x164/0x170 kernel/locking/rwsem.c:1542
f2fs_balance_fs+0x4d4/0x6a0 fs/f2fs/segment.c:529
f2fs_write_inode+0x4c3/0x540 fs/f2fs/inode.c:727
write_inode fs/fs-writeback.c:1478 [inline]
__writeback_single_inode+0x644/0xe30 fs/fs-writeback.c:1688
writeback_sb_inodes+0xbce/0x1a40 fs/fs-writeback.c:1913
__writeback_inodes_wb+0x114/0x400 fs/fs-writeback.c:1984
wb_writeback+0x465/0xc50 fs/fs-writeback.c:2089
wb_check_old_data_flush fs/fs-writeback.c:2189 [inline]
wb_do_writeback fs/fs-writeback.c:2242 [inline]
wb_workfn+0xc55/0x1130 fs/fs-writeback.c:2271
process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
kthread+0x3f6/0x4f0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8c91f020 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3258:
#0: ffff88814b5a8098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc90002bb32e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6af/0x1db0 drivers/tty/n_tty.c:2158
4 locks held by kworker/u4:6/3687:
#0: ffff888142199938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2283
#1: ffffc90002e6fd20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2285
#2: ffff88801f44a0e0 (&type->s_umount_key#64){.+.+}-{3:3}, at: trylock_super+0x1b/0xf0 fs/super.c:418
#3: ffff888032795108 (&sbi->gc_lock){+.+.}-{3:3}, at: f2fs_balance_fs+0x4d4/0x6a0 fs/f2fs/segment.c:529
4 locks held by kworker/u4:14/3757:
#0: ffff888142199938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2283
#1: ffffc90004f6fd20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2285
#2: ffff8880515e40e0 (&type->s_umount_key#64){.+.+}-{3:3}, at: trylock_super+0x1b/0xf0 fs/super.c:418
#3: ffff8880747c1108 (&sbi->gc_lock){+.+.}-{3:3}, at: f2fs_balance_fs+0x4d4/0x6a0 fs/f2fs/segment.c:529
4 locks held by kworker/u4:17/4000:
#0: ffff888142199938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2283
#1: ffffc9000132fd20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2285
#2: ffff88807b2a40e0 (&type->s_umount_key#64){.+.+}-{3:3}, at: trylock_super+0x1b/0xf0 fs/super.c:418
#3: ffff888014f99108 (&sbi->gc_lock){+.+.}-{3:3}, at: f2fs_balance_fs+0x4d4/0x6a0 fs/f2fs/segment.c:529
6 locks held by syz-executor.0/4504:
6 locks held by syz-executor.3/4557:
4 locks held by syz-executor.1/4564:
2 locks held by syz-executor.2/4889:
#0: ffff88807b2a40e0 (&type->s_umount_key#64){.+.+}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:703
#1: ffff88801ba307d8 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:362 [inline]
#1: ffff88801ba307d8 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x274/0xab0 fs/fs-writeback.c:2751
2 locks held by syz-executor.2/4896:
#0: ffff88807b2a40e0 (&type->s_umount_key#64){.+.+}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:703
#1: ffff88801ba307d8 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:362 [inline]
#1: ffff88801ba307d8 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x274/0xab0 fs/fs-writeback.c:2751
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.15.138-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
watchdog+0xe72/0xeb0 kernel/hung_task.c:295
kthread+0x3f6/0x4f0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4564 Comm: syz-executor.1 Not tainted 5.15.138-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
RIP: 0010:rwsem_read_trylock kernel/locking/rwsem.c:240 [inline]
RIP: 0010:__down_read_common kernel/locking/rwsem.c:1230 [inline]
RIP: 0010:__down_read kernel/locking/rwsem.c:1244 [inline]
RIP: 0010:down_read+0x6a/0x2e0 kernel/locking/rwsem.c:1490
Code: e8 1b 49 3e f7 48 83 c4 08 bf 01 00 00 00 e8 3d ff 32 f7 4c 89 ff be 08 00 00 00 e8 f0 a5 a5 f7 bb 00 01 00 00 f0 49 0f c1 1f <48> 81 c3 00 01 00 00 0f 88 56 01 00 00 48 b8 07 00 00 00 00 00 00
RSP: 0018:ffffc9000524f040 EFLAGS: 00000206
RAX: 1ffff1100664c601 RBX: 0000000000000000 RCX: ffffffff8a243380
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffff88801e051458
RBP: ffffc9000524f6b0 R08: dffffc0000000000 R09: ffffed1003c0a28c
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff1100bfdfc2d
R13: ffff88801e051458 R14: 1ffff1100bfdfc2d R15: ffff88801e051458
FS: 00007fb7c9f586c0(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056163fdd7680 CR3: 000000003c905000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
check_valid_map fs/f2fs/gc.c:881 [inline]
gc_data_segment fs/f2fs/gc.c:1450 [inline]
do_garbage_collect+0x20d8/0x7600 fs/f2fs/gc.c:1670
f2fs_gc+0x9e5/0x1ad0 fs/f2fs/gc.c:1764
f2fs_balance_fs+0x4e8/0x6a0 fs/f2fs/segment.c:530
f2fs_map_blocks+0x1989/0x28d0 fs/f2fs/data.c:1672
expand_inode_data+0x5ba/0x9d0 fs/f2fs/file.c:1697
f2fs_fallocate+0x35a/0x820 fs/f2fs/file.c:1787
vfs_fallocate+0x54a/0x6b0 fs/open.c:308
ksys_fallocate fs/open.c:331 [inline]
__do_sys_fallocate fs/open.c:339 [inline]
__se_sys_fallocate fs/open.c:337 [inline]
__x64_sys_fallocate+0xb9/0x100 fs/open.c:337
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fb7cb9d6ae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb7c9f580c8 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007fb7cbaf5f80 RCX: 00007fb7cb9d6ae9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 00007fb7cba2247a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000008800000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fb7cbaf5f80 R15: 00007ffe849cf378