INFO: task syz.0.83:4085 blocked for more than 143 seconds.
Not tainted 6.1.110-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.83 state:D stack:22904 pid:4085 ppid:3646 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5241 [inline]
__schedule+0x143f/0x4570 kernel/sched/core.c:6558
schedule+0xbf/0x180 kernel/sched/core.c:6634
wait_on_state fs/btrfs/extent-io-tree.c:709 [inline]
wait_extent_bit+0x423/0x570 fs/btrfs/extent-io-tree.c:742
lock_extent+0x17a/0x200 fs/btrfs/extent-io-tree.c:1657
btrfs_page_mkwrite+0x550/0xc90 fs/btrfs/inode.c:8609
do_page_mkwrite+0x1a1/0x5f0 mm/memory.c:2992
do_shared_fault mm/memory.c:4677 [inline]
do_fault mm/memory.c:4745 [inline]
handle_pte_fault mm/memory.c:5012 [inline]
__handle_mm_fault mm/memory.c:5154 [inline]
handle_mm_fault+0x22eb/0x5340 mm/memory.c:5275
do_user_addr_fault arch/x86/mm/fault.c:1340 [inline]
handle_page_fault arch/x86/mm/fault.c:1431 [inline]
exc_page_fault+0x26f/0x620 arch/x86/mm/fault.c:1487
asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0010:copy_user_enhanced_fast_string+0xa/0x40 arch/x86/lib/copy_user_64.S:166
Code: ff c9 75 f2 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 01 ca c3 8d 0c ca 89 ca eb 20 0f 01 cb 83 fa 40 72 38 89 d1 a4 31 c0 0f 01 ca c3 89 ca eb 0a 66 2e 0f 1f 84 00 00 00 00 00
RSP: 0018:ffffc900062d7798 EFLAGS: 00050202
RAX: ffffffff84373501 RBX: 00000000000000ed RCX: 00000000000000ed
RDX: 00000000000000ed RSI: ffff8880678cb000 RDI: 0000000020020b40
RBP: ffffc900062d78f8 R08: dffffc0000000000 R09: ffffed100cf1961e
R10: 0000000000000006 R11: dffffc0000000001 R12: ffff8880678cb000
R13: 1ffff92000c5afb3 R14: 00000000000000ed R15: dffffc0000000000
copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline]
raw_copy_to_user arch/x86/include/asm/uaccess_64.h:58 [inline]
copyout lib/iov_iter.c:170 [inline]
_copy_to_iter+0x2c2/0x1000 lib/iov_iter.c:527
copy_page_to_iter+0xac/0x170 lib/iov_iter.c:725
copy_folio_to_iter include/linux/uio.h:172 [inline]
filemap_read+0x273e/0x31d0 mm/filemap.c:2790
call_read_iter include/linux/fs.h:2259 [inline]
new_sync_read fs/read_write.c:389 [inline]
vfs_read+0x88d/0xbf0 fs/read_write.c:470
ksys_read+0x19c/0x2c0 fs/read_write.c:613
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f3e4497def9
RSP: 002b:00007f3e456db038 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f3e44b35f80 RCX: 00007f3e4497def9
RDX: 00000000000000ed RSI: 0000000020020b40 RDI: 0000000000000004
RBP: 00007f3e449f0b76 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f3e44b35f80 R15: 00007ffce742ef18
INFO: task syz.0.83:4128 blocked for more than 143 seconds.
Not tainted 6.1.110-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.83 state:D stack:23600 pid:4128 ppid:3646 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5241 [inline]
__schedule+0x143f/0x4570 kernel/sched/core.c:6558
schedule+0xbf/0x180 kernel/sched/core.c:6634
wait_on_state fs/btrfs/extent-io-tree.c:709 [inline]
wait_extent_bit+0x423/0x570 fs/btrfs/extent-io-tree.c:742
lock_extent+0x17a/0x200 fs/btrfs/extent-io-tree.c:1657
btrfs_page_mkwrite+0x550/0xc90 fs/btrfs/inode.c:8609
do_page_mkwrite+0x1a1/0x5f0 mm/memory.c:2992
wp_page_shared+0x164/0x380 mm/memory.c:3341
handle_pte_fault mm/memory.c:5030 [inline]
__handle_mm_fault mm/memory.c:5154 [inline]
handle_mm_fault+0x2525/0x5340 mm/memory.c:5275
do_user_addr_fault arch/x86/mm/fault.c:1340 [inline]
handle_page_fault arch/x86/mm/fault.c:1431 [inline]
exc_page_fault+0x26f/0x620 arch/x86/mm/fault.c:1487
asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0010:copy_user_short_string+0xd/0x40 arch/x86/lib/copy_user_64.S:233
Code: 74 0a 89 d1 f3 a4 89 c8 0f 01 ca c3 89 d0 0f 01 ca c3 01 ca eb e7 0f 1f 80 00 00 00 00 89 d1 83 e2 07 c1 e9 03 74 12 4c 8b 06 <4c> 89 07 48 8d 76 08 48 8d 7f 08 ff c9 75 ee 21 d2 74 10 89 d1 8a
RSP: 0018:ffffc9000ac1f3b0 EFLAGS: 00050202
RAX: ffffffff84397f01 RBX: 00007fffffffefc8 RCX: 0000000000000007
RDX: 0000000000000000 RSI: ffffc9000ac1f460 RDI: 00000000200001e0
RBP: ffffc9000ac1f510 R08: 0000000000000000 R09: fffff52001583e93
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000038
R13: ffffc9000ac1f460 R14: 00000000200001e0 R15: ffffc9000ac1f460
copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline]
raw_copy_to_user arch/x86/include/asm/uaccess_64.h:58 [inline]
_copy_to_user+0xe9/0x130 lib/usercopy.c:41
copy_to_user include/linux/uaccess.h:169 [inline]
fiemap_fill_next_extent+0x231/0x410 fs/ioctl.c:144
emit_fiemap_extent fs/btrfs/extent_io.c:3561 [inline]
fiemap_process_hole+0x107e/0x1290 fs/btrfs/extent_io.c:3821
extent_fiemap+0xef7/0x1ff0
btrfs_fiemap+0x174/0x1e0 fs/btrfs/inode.c:8281
ioctl_fiemap fs/ioctl.c:219 [inline]
do_vfs_ioctl+0x18e9/0x2a90 fs/ioctl.c:810
__do_sys_ioctl fs/ioctl.c:868 [inline]
__se_sys_ioctl+0x81/0x160 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f3e4497def9
RSP: 002b:00007f3e456ba038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f3e44b36058 RCX: 00007f3e4497def9
RDX: 00000000200001c0 RSI: 00000000c020660b RDI: 0000000000000004
RBP: 00007f3e449f0b76 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f3e44b36058 R15: 00007ffce742ef18
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8d32b1d0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xe30 kernel/rcu/tasks.h:517
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8d32b9d0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xe30 kernel/rcu/tasks.h:517
1 lock held by khungtaskd/28:
#0: ffffffff8d32b000 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
#0: ffffffff8d32b000 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
#0: ffffffff8d32b000 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6494
3 locks held by kworker/u4:2/41:
#0: ffff888017c79138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
#1: ffffc90000b27d20 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
#2: ffffffff8e4f96e8 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xa/0x50 net/core/link_watch.c:263
5 locks held by kworker/u4:4/102:
#0: ffff888017e1e938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
#1: ffffc900015f7d20 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
#2: ffffffff8e4ed390 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xf1/0xb60 net/core/net_namespace.c:566
#3: ffffffff8e4f96e8 (rtnl_mutex){+.+.}-{3:3}, at: default_device_exit_batch+0xe5/0x9d0 net/core/dev.c:11381
#4: ffffffff8d3305f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:291 [inline]
#4: ffffffff8d3305f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x4f0/0x930 kernel/rcu/tree_exp.h:962
2 locks held by getty/3395:
#0: ffff88814b4a0098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc900031262f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a7/0x1db0 drivers/tty/n_tty.c:2198
2 locks held by kworker/1:5/3687:
#0: ffff888017c72138 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
#1: ffffc9000480fd20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
3 locks held by kworker/1:7/3717:
#0: ffff88814b045138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
#1: ffffc9000485fd20 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
#2: ffffffff8e4f96e8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xcc/0x16b0 net/ipv6/addrconf.c:4115
3 locks held by kworker/0:14/3975:
#0: ffff888017c70938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
#1: ffffc900056cfd20 (deferred_process_work){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
#2: ffffffff8e4f96e8 (rtnl_mutex){+.+.}-{3:3}, at: switchdev_deferred_process_work+0xa/0x20 net/switchdev/switchdev.c:104
4 locks held by syz.0.83/4085:
#0: ffff8880765745e8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x2ba/0x360 fs/file.c:1058
#1: ffff88807cbaf958 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline]
#1: ffff88807cbaf958 (&mm->mmap_lock){++++}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:5303 [inline]
#1: ffff88807cbaf958 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x2e/0x2e0 mm/memory.c:5365
#2: ffff88805b392558 (sb_pagefaults#2){.+.+}-{0:0}, at: do_page_mkwrite+0x1a1/0x5f0 mm/memory.c:2992
#3: ffff888072328e08 (&ei->i_mmap_lock){++++}-{3:3}, at: btrfs_page_mkwrite+0x421/0xc90 fs/btrfs/inode.c:8598
4 locks held by syz.0.83/4128:
#0: ffff888072328f80 (&sb->s_type->i_mutex_key#25){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline]
#0: ffff888072328f80 (&sb->s_type->i_mutex_key#25){++++}-{3:3}, at: btrfs_inode_lock+0x5c/0xd0 fs/btrfs/inode.c:147
#1: ffff88807cbaf958 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline]
#1: ffff88807cbaf958 (&mm->mmap_lock){++++}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:5303 [inline]
#1: ffff88807cbaf958 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x2e/0x2e0 mm/memory.c:5365
#2: ffff88805b392558 (sb_pagefaults#2){.+.+}-{0:0}, at: do_page_mkwrite+0x1a1/0x5f0 mm/memory.c:2992
#3: ffff888072328e08 (&ei->i_mmap_lock){++++}-{3:3}, at: btrfs_page_mkwrite+0x421/0xc90 fs/btrfs/inode.c:8598
2 locks held by btrfs-cleaner/4120:
#0: ffff88805b392460 (sb_writers#17){.+.+}-{0:0}, at: cleaner_kthread+0x1e3/0x370 fs/btrfs/disk-io.c:1843
#1: ffff888072328f80 (&sb->s_type->i_mutex_key#25){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff888072328f80 (&sb->s_type->i_mutex_key#25){++++}-{3:3}, at: btrfs_inode_lock+0x49/0xd0 fs/btrfs/inode.c:155
2 locks held by syz-executor/5072:
#0: ffffffff8e558770 (cb_lock){++++}-{3:3}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:860
#1: ffffffff8e4f96e8 (rtnl_mutex){+.+.}-{3:3}, at: nl80211_pre_doit+0x5b/0x8a0 net/wireless/nl80211.c:16216
3 locks held by syz-executor/5226:
#0: ffffffff8e558770 (cb_lock){++++}-{3:3}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:860
#1: ffffffff8e558628 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline]
#1: ffffffff8e558628 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x125/0xf70 net/netlink/genetlink.c:848
#2: ffffffff8e4f96e8 (rtnl_mutex){+.+.}-{3:3}, at: wg_set_device+0xfe/0x2140 drivers/net/wireguard/netlink.c:504
2 locks held by syz.4.355/5494:
#0: ffffffff8e558770 (cb_lock){++++}-{3:3}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:860
#1: ffffffff8e558628 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline]
#1: ffffffff8e558628 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x125/0xf70 net/netlink/genetlink.c:848
2 locks held by syz.4.355/5495:
#0: ffffffff8e558770 (cb_lock){++++}-{3:3}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:860
#1: ffffffff8e4f96e8 (rtnl_mutex){+.+.}-{3:3}, at: nl80211_pre_doit+0x5b/0x8a0 net/wireless/nl80211.c:16216
2 locks held by syz.0.361/5518:
#0: ffffffff8e558770 (cb_lock){++++}-{3:3}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:860
#1: ffffffff8e558628 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline]
#1: ffffffff8e558628 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x125/0xf70 net/netlink/genetlink.c:848
2 locks held by syz.0.361/5519:
#0: ffffffff8e558770 (cb_lock){++++}-{3:3}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:860
#1: ffffffff8e558628 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline]
#1: ffffffff8e558628 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x125/0xf70 net/netlink/genetlink.c:848
2 locks held by dhcpcd/5520:
#0: ffff88807a89a130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1748 [inline]
#0: ffff88807a89a130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x32/0xd00 net/packet/af_packet.c:3263
#1: ffffffff8d3305f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:323 [inline]
#1: ffffffff8d3305f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x360/0x930 kernel/rcu/tree_exp.h:962
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.1.110-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
nmi_cpu_backtrace+0x4e1/0x560 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1ae/0x3f0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xf88/0xfd0 kernel/hung_task.c:377
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
NMI backtrace for cpu 0 skipped: idling at acpi_safe_halt drivers/acpi/processor_idle.c:111 [inline]
NMI backtrace for cpu 0 skipped: idling at acpi_idle_do_entry+0x10f/0x340 drivers/acpi/processor_idle.c:567