INFO: task syz.2.21:5425 blocked for more than 143 seconds.
Not tainted 6.11.0-rc7-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.21 state:D stack:26968 pid:5425 tgid:5398 ppid:5234 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0x17ae/0x4a10 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6621
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678
rwsem_down_write_slowpath+0xeeb/0x13b0 kernel/locking/rwsem.c:1178
__down_write_common kernel/locking/rwsem.c:1306 [inline]
__down_write kernel/locking/rwsem.c:1315 [inline]
down_write+0x1d7/0x220 kernel/locking/rwsem.c:1580
inode_lock include/linux/fs.h:800 [inline]
finish_preallocate_blocks fs/f2fs/file.c:561 [inline]
f2fs_file_open+0x11b/0x3a0 fs/f2fs/file.c:614
do_dentry_open+0x970/0x1440 fs/open.c:959
vfs_open+0x3e/0x330 fs/open.c:1089
do_open fs/namei.c:3727 [inline]
path_openat+0x2b3e/0x3470 fs/namei.c:3886
do_filp_open+0x235/0x490 fs/namei.c:3913
do_sys_openat2+0x13e/0x1d0 fs/open.c:1416
do_sys_open fs/open.c:1431 [inline]
__do_sys_openat fs/open.c:1447 [inline]
__se_sys_openat fs/open.c:1442 [inline]
__x64_sys_openat+0x247/0x2a0 fs/open.c:1442
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f403337cef9
RSP: 002b:00007f40340b7038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f4033536130 RCX: 00007f403337cef9
RDX: 0000000000000000 RSI: 0000000020004280 RDI: ffffffffffffff9c
RBP: 00007f40333ef046 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f4033536130 R15: 00007ffd1c446a68
Showing all locks held in the system:
3 locks held by kworker/u8:1/12:
1 lock held by khungtaskd/30:
#0: ffffffff8e738320 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
#0: ffffffff8e738320 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
#0: ffffffff8e738320 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6626
4 locks held by kworker/u8:6/1068:
#0: ffff888020abb148 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline]
#0: ffff888020abb148 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312
#1: ffffc90003f47d00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline]
#1: ffffc90003f47d00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312
#2: ffff88805db6a0e0 (&type->s_umount_key#59){++++}-{3:3}, at: super_trylock_shared+0x22/0xf0 fs/super.c:562
#3: ffff8880331b12a0 (&sbi->gc_lock){+.+.}-{3:3}, at: f2fs_down_write fs/f2fs/f2fs.h:2175 [inline]
#3: ffff8880331b12a0 (&sbi->gc_lock){+.+.}-{3:3}, at: f2fs_balance_fs+0x5b0/0x7a0 fs/f2fs/segment.c:440
3 locks held by kworker/u8:7/1076:
4 locks held by kworker/u8:8/2588:
#0: ffff888020abb148 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline]
#0: ffff888020abb148 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312
#1: ffffc900094d7d00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline]
#1: ffffc900094d7d00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312
#2: ffff8880284160e0 (&type->s_umount_key#59){++++}-{3:3}, at: super_trylock_shared+0x22/0xf0 fs/super.c:562
#3: ffff8880264c12a0 (&sbi->gc_lock){+.+.}-{3:3}, at: f2fs_down_write fs/f2fs/f2fs.h:2175 [inline]
#3: ffff8880264c12a0 (&sbi->gc_lock){+.+.}-{3:3}, at: f2fs_balance_fs+0x5b0/0x7a0 fs/f2fs/segment.c:440
2 locks held by getty/4977:
#0: ffff8880307ee0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900031232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ac/0x1e00 drivers/tty/n_tty.c:2211
6 locks held by syz.2.21/5424:
1 lock held by syz.2.21/5425:
#0: ffff88805d2dd918 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:800 [inline]
#0: ffff88805d2dd918 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: finish_preallocate_blocks fs/f2fs/file.c:561 [inline]
#0: ffff88805d2dd918 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: f2fs_file_open+0x11b/0x3a0 fs/f2fs/file.c:614
2 locks held by syz.1.30/5454:
#0: ffff88805db6a0e0 (&type->s_umount_key#59){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88805db6a0e0 (&type->s_umount_key#59){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
#1: ffff8880256da7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:388 [inline]
#1: ffff8880256da7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x274/0xb20 fs/fs-writeback.c:2790
4 locks held by syz.4.114/6114:
1 lock held by syz.4.114/6116:
#0: ffff88805d2d8148 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:800 [inline]
#0: ffff88805d2d8148 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: do_lock_mount+0x112/0x3a0 fs/namespace.c:2580
2 locks held by syz.1.158/6410:
#0: ffff88805db6a0e0 (&type->s_umount_key#59){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88805db6a0e0 (&type->s_umount_key#59){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
#1: ffff8880256da7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:388 [inline]
#1: ffff8880256da7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x274/0xb20 fs/fs-writeback.c:2790
2 locks held by syz.4.200/6740:
#0: ffff88805db6a0e0 (&type->s_umount_key#59){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88805db6a0e0 (&type->s_umount_key#59){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
#1: ffff8880256da7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:388 [inline]
#1: ffff8880256da7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x274/0xb20 fs/fs-writeback.c:2790
2 locks held by syz.4.200/6743:
#0: ffff88805db6a0e0 (&type->s_umount_key#59){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88805db6a0e0 (&type->s_umount_key#59){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
#1: ffff8880256da7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:388 [inline]
#1: ffff8880256da7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x274/0xb20 fs/fs-writeback.c:2790
1 lock held by syz-executor/6851:
#0: ffffffff8e73d6f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:328 [inline]
#0: ffffffff8e73d6f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x451/0x830 kernel/rcu/tree_exp.h:958
2 locks held by syz.3.234/7003:
2 locks held by syz.2.235/7006:
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
__dump_stack lib/dump_stack.c:93 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119
nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xff4/0x1040 kernel/hung_task.c:379
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 7003 Comm: syz.3.234 Not tainted 6.11.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:check_kcov_mode kernel/kcov.c:182 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x18/0x70 kernel/kcov.c:216
Code: 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 65 48 8b 0c 25 c0 d6 03 00 65 8b 15 50 4a 70 7e <81> e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 1c 16 00 00
RSP: 0018:ffffc9000370ee20 EFLAGS: 00000283
RAX: ffffffff81415575 RBX: ffffc9000370ef60 RCX: ffff888027750000
RDX: 0000000080000001 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000370f550 R08: ffffffff8141554b R09: ffffffff814140bf
R10: 0000000000000003 R11: ffff888027750000 R12: 1ffff920006e1ded
R13: 1ffff920006e1dee R14: 1ffff920006e1dec R15: ffffc90003710000
FS: 00007faa74d046c0(0000) GS:ffff8880b8800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f24938fb000 CR3: 000000007d776000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
stack_access_ok arch/x86/kernel/unwind_orc.c:393 [inline]
deref_stack_reg+0xd5/0x260 arch/x86/kernel/unwind_orc.c:403
unwind_next_frame+0x1ab8/0x2a00 arch/x86/kernel/unwind_orc.c:648
arch_stack_walk+0x151/0x1b0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
save_stack+0xfb/0x1f0 mm/page_owner.c:156
__set_page_owner+0x92/0x800 mm/page_owner.c:320
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1500
prep_new_page mm/page_alloc.c:1508 [inline]
get_page_from_freelist+0x2e4c/0x2f10 mm/page_alloc.c:3446
__alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4702
alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2263
folio_alloc_mpol_noprof+0x36/0x50 mm/mempolicy.c:2281
shmem_alloc_folio mm/shmem.c:1722 [inline]
shmem_alloc_and_add_folio+0x2cf/0x14f0 mm/shmem.c:1782
shmem_get_folio_gfp+0x8dc/0x2370 mm/shmem.c:2188
shmem_get_folio mm/shmem.c:2293 [inline]
shmem_write_begin+0x170/0x4d0 mm/shmem.c:2898
generic_perform_write+0x399/0x840 mm/filemap.c:4019
shmem_file_write_iter+0xfc/0x120 mm/shmem.c:3074
new_sync_write fs/read_write.c:497 [inline]
vfs_write+0xa72/0xc90 fs/read_write.c:590
ksys_write+0x1a0/0x2c0 fs/read_write.c:643
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7faa73f7b9df
Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 c9 8d 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 1c 8e 02 00 48
RSP: 002b:00007faa74d03df0 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000001000000 RCX: 00007faa73f7b9df
RDX: 0000000001000000 RSI: 00007faa69600000 RDI: 000000000000000a
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000009600
R10: 0000000020009642 R11: 0000000000000293 R12: 000000000000000a
R13: 00007faa74d03ef0 R14: 00007faa74d03eb0 R15: 00007faa69600000