INFO: task syz.3.76:5702 blocked for more than 143 seconds.
Not tainted 6.11.0-next-20240926-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.76 state:D stack:23904 pid:5702 tgid:5677 ppid:5235 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5315 [inline]
__schedule+0x1895/0x4b30 kernel/sched/core.c:6675
__schedule_loop kernel/sched/core.c:6752 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6767
io_schedule+0x8d/0x110 kernel/sched/core.c:7552
folio_wait_bit_common+0x882/0x12b0 mm/filemap.c:1310
folio_wait_writeback+0xe7/0x1e0 mm/page-writeback.c:3189
truncate_inode_pages_range+0xafd/0xfc0 mm/truncate.c:398
bchfs_fallocate+0x2d1/0x730 fs/bcachefs/fs-io.c:718
bch2_fallocate_dispatch+0x3ac/0x540 fs/bcachefs/fs-io.c:771
vfs_fallocate+0x623/0x7a0 fs/open.c:333
do_vfs_ioctl+0x2583/0x2e40 fs/ioctl.c:886
__do_sys_ioctl fs/ioctl.c:905 [inline]
__se_sys_ioctl+0x81/0x170 fs/ioctl.c:893
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: 0033:0x7f3f0e37df39
RSP: 002b:00007f3f0f0a2038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f3f0e536058 RCX: 00007f3f0e37df39
RDX: 0000000020000180 RSI: 0000000040305839 RDI: 0000000000000008
RBP: 00007f3f0e3f0216 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f3f0e536058 R15: 00007ffc561c09c8
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e937f20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e937f20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e937f20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6720
2 locks held by dhcpcd/4898:
#0: ffff888144e8c6c8 (nlk_cb_mutex-ROUTE){+.+.}-{3:3}, at: netlink_dump+0xcb/0xd80 net/netlink/af_netlink.c:2271
#1: ffffffff8fcd5188 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#1: ffffffff8fcd5188 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_dumpit+0x99/0x200 net/core/rtnetlink.c:6505
2 locks held by getty/4986:
#0: ffff8880329320a0 (&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
3 locks held by kworker/u8:9/5465:
#0: ffff88802e7be148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
#0: ffff88802e7be148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
#1: ffffc90009497d00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
#1: ffffc90009497d00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
#2: ffffffff8fcd5188 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4196
1 lock held by syz.3.76/5678:
#0: ffff88814b982420 (sb_writers#19){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2949 [inline]
#0: ffff88814b982420 (sb_writers#19){.+.+}-{0:0}, at: vfs_write+0x224/0xc90 fs/read_write.c:679
2 locks held by syz.3.76/5702:
#0: ffff88814b982420 (sb_writers#19){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2949 [inline]
#0: ffff88814b982420 (sb_writers#19){.+.+}-{0:0}, at: vfs_fallocate+0x59d/0x7a0 fs/open.c:332
#1: ffff888060b508c0 (&sb->s_type->i_mutex_key#24){++++}-{3:3}, at: inode_lock include/linux/fs.h:815 [inline]
#1: ffff888060b508c0 (&sb->s_type->i_mutex_key#24){++++}-{3:3}, at: bch2_fallocate_dispatch+0x1e2/0x540 fs/bcachefs/fs-io.c:762
1 lock held by bch-copygc/loop/5700:
2 locks held by syz.0.159/6175:
#0: ffff88814b9820e0 (&type->s_umount_key#65){.+.+}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88814b9820e0 (&type->s_umount_key#65){.+.+}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
#1: ffff88814b982938 (&s->s_sync_lock){+.+.}-{3:3}, at: wait_sb_inodes fs/fs-writeback.c:2619 [inline]
#1: ffff88814b982938 (&s->s_sync_lock){+.+.}-{3:3}, at: sync_inodes_sb+0x32e/0xb50 fs/fs-writeback.c:2802
1 lock held by syz-executor/6494:
#0: ffffffff8fcd5188 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8fcd5188 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6643
1 lock held by syz-executor/6774:
#0: ffffffff8fcd5188 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8fcd5188 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6643
3 locks held by syz.4.275/7010:
#0: ffff888069780908 (&c->sb_lock){+.+.}-{3:3}, at: bch2_fs_alloc fs/bcachefs/super.c:827 [inline]
#0: ffff888069780908 (&c->sb_lock){+.+.}-{3:3}, at: bch2_fs_open+0x1683/0x2f80 fs/bcachefs/super.c:2050
#1: ffff8880697849d0 (&c->mark_lock){++++}-{0:0}, at: bch2_sb_replicas_to_cpu_replicas+0x1e0/0x2e0 fs/bcachefs/replicas.c:572
#2: ffffffff8e93d4b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:329 [inline]
#2: ffffffff8e93d4b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x451/0x830 kernel/rcu/tree_exp.h:976
3 locks held by syz.3.276/7013:
#0: ffff8880608f8e08 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:815 [inline]
#0: ffff8880608f8e08 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: __sock_release net/socket.c:658 [inline]
#0: ffff8880608f8e08 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: sock_close+0x90/0x240 net/socket.c:1427
#1: ffffffff8fcd5188 (rtnl_mutex){+.+.}-{3:3}, at: mrtsock_destruct+0x4c/0x240 net/ipv4/ipmr.c:1337
#2: ffffffff8e93d4b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:297 [inline]
#2: ffffffff8e93d4b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x381/0x830 kernel/rcu/tree_exp.h:976
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-next-20240926-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
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: 7013 Comm: syz.3.276 Not tainted 6.11.0-next-20240926-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
RIP: 0010:rcu_is_watching+0x3a/0xb0 kernel/rcu/tree.c:737
Code: e8 3b 06 4d 0a 89 c3 83 f8 08 73 7a 49 bf 00 00 00 00 00 fc ff df 4c 8d 34 dd 50 0a 32 8e 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 <74> 08 4c 89 f7 e8 2c e6 83 00 48 c7 c3 98 7e 03 00 49 03 1e 48 89
RSP: 0018:ffffc90003a4f1a0 EFLAGS: 00000246
RAX: 1ffffffff1c6414b RBX: 0000000000000001 RCX: ffff8880263d9e00
RDX: dffffc0000000000 RSI: ffffffff8c610e00 RDI: ffffffff8c610dc0
RBP: 1ffff110049d14d4 R08: ffffffff818d6234 R09: 1ffffffff2859b00
R10: dffffc0000000000 R11: fffffbfff2859b01 R12: 0000000000000012
R13: ffff888024e8a048 R14: ffffffff8e320a58 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efd9df67000 CR3: 000000000e734000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rcu_read_unlock include/linux/rcupdate.h:878 [inline]
__lruvec_stat_mod_folio+0x1bf/0x300 mm/memcontrol.c:785
__folio_mod_stat mm/rmap.c:1293 [inline]
__folio_remove_rmap mm/rmap.c:1585 [inline]
folio_remove_rmap_ptes+0x143/0x480 mm/rmap.c:1612
tlb_flush_rmap_batch+0x12b/0x2b0 mm/mmu_gather.c:66
tlb_flush_rmaps+0xa2/0x100 mm/mmu_gather.c:89
zap_pte_range mm/memory.c:1690 [inline]
zap_pmd_range mm/memory.c:1740 [inline]
zap_pud_range mm/memory.c:1769 [inline]
zap_p4d_range mm/memory.c:1790 [inline]
unmap_page_range+0x368a/0x40e0 mm/memory.c:1811
unmap_vmas+0x3cc/0x5f0 mm/memory.c:1901
exit_mmap+0x275/0xc40 mm/mmap.c:1864
__mmput+0x115/0x390 kernel/fork.c:1347
exit_mm+0x220/0x310 kernel/exit.c:571
do_exit+0x9b2/0x28e0 kernel/exit.c:926
do_group_exit+0x207/0x2c0 kernel/exit.c:1088
get_signal+0x176f/0x1810 kernel/signal.c:2936
arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f20e857df39
Code: Unable to access opcode bytes at 0x7f20e857df0f.
RSP: 002b:00007fff1c12cca8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f20e8737a80 RCX: 00007f20e857df39
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f20e8737a80 R08: 0000000000000006 R09: 00007fff1c12cf9f
R10: 00000000005ec2e0 R11: 0000000000000246 R12: 00000000000420cb
R13: 00007fff1c12cdb0 R14: 0000000000000032 R15: ffffffffffffffff