INFO: task syz.0.1:5338 blocked for more than 143 seconds.
Not tainted 6.11.0-syzkaller-08833-gde5cb0dcb74c #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.1 state:D stack:22832 pid:5338 tgid:5299 ppid:5219 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5315 [inline]
__schedule+0x1843/0x4ae0 kernel/sched/core.c:6674
__schedule_loop kernel/sched/core.c:6751 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6766
io_schedule+0x8d/0x110 kernel/sched/core.c:7551
folio_wait_bit_common+0x882/0x12b0 mm/filemap.c:1309
folio_wait_writeback+0xe7/0x1e0 mm/page-writeback.c:3189
truncate_inode_pages_range+0xafd/0xfc0 mm/truncate.c:398
truncate_inode_pages mm/truncate.c:423 [inline]
truncate_pagecache mm/truncate.c:727 [inline]
truncate_setsize+0xcf/0xf0 mm/truncate.c:752
bchfs_truncate+0x6aa/0xc70 fs/bcachefs/fs-io.c:460
notify_change+0xbca/0xe90 fs/attr.c:503
do_truncate+0x220/0x310 fs/open.c:65
handle_truncate fs/namei.c:3395 [inline]
do_open fs/namei.c:3778 [inline]
path_openat+0x2e1e/0x3590 fs/namei.c:3933
do_filp_open+0x235/0x490 fs/namei.c:3960
do_sys_openat2+0x13e/0x1d0 fs/open.c:1415
do_sys_open fs/open.c:1430 [inline]
__do_sys_openat fs/open.c:1446 [inline]
__se_sys_openat fs/open.c:1441 [inline]
__x64_sys_openat+0x247/0x2a0 fs/open.c:1441
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: 0033:0x7f1fc1d7def9
RSP: 002b:00007f1fc2c25038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f1fc1f36058 RCX: 00007f1fc1d7def9
RDX: 0000000000040282 RSI: 0000000020000080 RDI: ffffffffffffff9c
RBP: 00007f1fc1df0b76 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f1fc1f36058 R15: 00007ffe5d76cef8
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff8e937ee0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e937ee0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e937ee0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6701
2 locks held by getty/4973:
#0: ffff88802e6a40a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
1 lock held by syz.0.1/5301:
#0: ffff888058732420 (sb_writers#16){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2930 [inline]
#0: ffff888058732420 (sb_writers#16){.+.+}-{0:0}, at: vfs_write+0x224/0xc90 fs/read_write.c:679
2 locks held by syz.0.1/5338:
#0: ffff888058732420 (sb_writers#16){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:515
#1: ffff88805c198148 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:815 [inline]
#1: ffff88805c198148 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: do_truncate+0x20c/0x310 fs/open.c:63
2 locks held by bch-reclaim/loo/5322:
2 locks held by syz.2.77/5960:
#0: ffff8880587320e0 (&type->s_umount_key#85){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff8880587320e0 (&type->s_umount_key#85){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
#1: ffff888058732938 (&s->s_sync_lock){+.+.}-{3:3}, at: wait_sb_inodes fs/fs-writeback.c:2619 [inline]
#1: ffff888058732938 (&s->s_sync_lock){+.+.}-{3:3}, at: sync_inodes_sb+0x335/0xb40 fs/fs-writeback.c:2802
1 lock held by syz.0.98/6118:
#0: ffff8880587320e0 (&type->s_umount_key#85){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff8880587320e0 (&type->s_umount_key#85){++++}-{3:3}, at: super_lock+0x196/0x400 fs/super.c:120
1 lock held by syz.4.101/6147:
#0: ffff8880587320e0 (&type->s_umount_key#85){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff8880587320e0 (&type->s_umount_key#85){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
2 locks held by syz-executor/6314:
#0: ffff88802e2f80e0 (&type->s_umount_key#70){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88802e2f80e0 (&type->s_umount_key#70){+.+.}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88802e2f80e0 (&type->s_umount_key#70){+.+.}-{3:3}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
#1: ffff88804e6de0e0 (&sbi->s_lock#2){+.+.}-{3:3}, at: exfat_sync_fs+0x6b/0x100 fs/exfat/super.c:53
1 lock held by syz.2.147/6395:
#0: ffff8880587320e0 (&type->s_umount_key#85){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff8880587320e0 (&type->s_umount_key#85){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz.4.148/6399:
#0: ffff8880587320e0 (&type->s_umount_key#85){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff8880587320e0 (&type->s_umount_key#85){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
2 locks held by syz.3.196/6621:
4 locks held by syz.0.197/6623:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.11.0-syzkaller-08833-gde5cb0dcb74c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 6623 Comm: syz.0.197 Not tainted 6.11.0-syzkaller-08833-gde5cb0dcb74c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:hlock_class kernel/locking/lockdep.c:228 [inline]
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4823 [inline]
RIP: 0010:__lock_acquire+0x4dc/0x2050 kernel/locking/lockdep.c:5149
Code: 13 00 00 44 89 3b 44 89 c3 48 89 d8 48 c1 e8 06 48 8d 3c c5 c0 57 22 94 be 08 00 00 00 e8 0c 26 8b 00 48 0f a3 1d 54 31 b2 12 <73> 27 48 69 c3 c8 00 00 00 48 8d 98 c0 d6 be 93 48 ba 00 00 00 00
RSP: 0018:ffffc9000366f110 EFLAGS: 00000057
RAX: 0000000000000001 RBX: 000000000000001a RCX: ffffffff81702664
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff942257c0
RBP: 000000000000000f R08: ffffffff942257c7 R09: 1ffffffff2844af8
R10: dffffc0000000000 R11: fffffbfff2844af9 R12: ffff88802548da00
R13: 000000000000001a R14: 000000000002001a R15: 0000000000000000
FS: 00007f945c2d66c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9451bff000 CR3: 000000005d344000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5822
rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
rcu_read_lock_sched include/linux/rcupdate.h:941 [inline]
pfn_valid+0x113/0x450 include/linux/mmzone.h:2043
page_table_check_clear+0x1e/0x550 mm/page_table_check.c:70
zap_present_ptes mm/memory.c:1552 [inline]
zap_pte_range mm/memory.c:1621 [inline]
zap_pmd_range mm/memory.c:1739 [inline]
zap_pud_range mm/memory.c:1768 [inline]
zap_p4d_range mm/memory.c:1789 [inline]
unmap_page_range+0x29df/0x40e0 mm/memory.c:1810
unmap_vmas+0x3cc/0x5f0 mm/memory.c:1900
vms_clear_ptes+0x361/0x530 mm/vma.c:1089
vms_complete_munmap_vmas+0x208/0x910 mm/vma.c:1140
do_vmi_align_munmap+0x613/0x730 mm/vma.c:1349
do_vmi_munmap+0x24e/0x2d0 mm/vma.c:1397
__vm_munmap+0x24c/0x480 mm/mmap.c:1600
__do_sys_munmap mm/mmap.c:1617 [inline]
__se_sys_munmap mm/mmap.c:1614 [inline]
__x64_sys_munmap+0x68/0x80 mm/mmap.c:1614
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: 0033:0x7f945b57df87
Code: 00 00 00 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 0b 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f945c2d5e18 EFLAGS: 00000246 ORIG_RAX: 000000000000000b
RAX: ffffffffffffffda RBX: 0000000001000000 RCX: 00007f945b57df87
RDX: 0000000000000000 RSI: 0000000008400000 RDI: 00007f9450c00000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000005f10
R10: 0000000000000774 R11: 0000000000000246 R12: 0000000000000004
R13: 00007f945c2d5ef0 R14: 00007f945c2d5eb0 R15: 00007f9450c00000