INFO: task syz-executor.2:20905 blocked for more than 143 seconds.
Not tainted 6.7.0-rc4-syzkaller-00039-g9ace34a8e446 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:25040 pid:20905 tgid:20905 ppid:5090 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0x1961/0x4ab0 kernel/sched/core.c:6688
__schedule_loop kernel/sched/core.c:6763 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6778
wait_extent_bit fs/btrfs/extent-io-tree.c:799 [inline]
lock_extent+0x69d/0x850 fs/btrfs/extent-io-tree.c:1843
btrfs_page_mkwrite+0x5bd/0xd10 fs/btrfs/inode.c:8158
do_page_mkwrite+0x197/0x470 mm/memory.c:2943
wp_page_shared mm/memory.c:3338 [inline]
do_wp_page+0x1d07/0x4d40 mm/memory.c:3478
handle_pte_fault mm/memory.c:5054 [inline]
__handle_mm_fault mm/memory.c:5179 [inline]
handle_mm_fault+0x1b1c/0x6680 mm/memory.c:5344
do_user_addr_fault arch/x86/mm/fault.c:1364 [inline]
handle_page_fault arch/x86/mm/fault.c:1505 [inline]
exc_page_fault+0x456/0x870 arch/x86/mm/fault.c:1561
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x7ffb2f25dc2b
RSP: 002b:00007ffeca5b98f8 EFLAGS: 00010202
RAX: 0000000020000040 RBX: 00007ffeca5b9a08 RCX: 0000000000737562
RDX: 0000000000000006 RSI: 0000000075622f2e RDI: 0000000020000040
RBP: 0000000000000032 R08: 00007ffb2f200000 R09: 00007ffeca5f00b0
R10: 00007ffeca5f0080 R11: 0000000000059b9c R12: 00007ffb2ee060c0
R13: fffffffffffffffe R14: 00007ffb2ee00000 R15: 00007ffb2ee060c8
INFO: task syz-executor.2:20906 blocked for more than 144 seconds.
Not tainted 6.7.0-rc4-syzkaller-00039-g9ace34a8e446 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:22544 pid:20906 tgid:20905 ppid:5090 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0x1961/0x4ab0 kernel/sched/core.c:6688
__schedule_loop kernel/sched/core.c:6763 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6778
io_schedule+0x8c/0x100 kernel/sched/core.c:8998
folio_wait_bit_common+0x881/0x12b0 mm/filemap.c:1273
btrfs_page_mkwrite+0x4a4/0xd10 fs/btrfs/inode.c:8148
do_page_mkwrite+0x197/0x470 mm/memory.c:2943
wp_page_shared mm/memory.c:3338 [inline]
do_wp_page+0x1d07/0x4d40 mm/memory.c:3478
handle_pte_fault mm/memory.c:5054 [inline]
__handle_mm_fault mm/memory.c:5179 [inline]
handle_mm_fault+0x1b1c/0x6680 mm/memory.c:5344
do_user_addr_fault arch/x86/mm/fault.c:1413 [inline]
handle_page_fault arch/x86/mm/fault.c:1505 [inline]
exc_page_fault+0x2ad/0x870 arch/x86/mm/fault.c:1561
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0010:rep_movs_alternative+0x33/0x70 arch/x86/lib/copy_user_64.S:58
Code: 40 83 f9 08 73 21 85 c9 74 0f 8a 06 88 07 48 ff c7 48 ff c6 48 ff c9 75 f1 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 8b 06 <48> 89 07 48 83 c6 08 48 83 c7 08 83 e9 08 74 df 83 f9 08 73 e8 eb
RSP: 0018:ffffc90016687330 EFLAGS: 00050206
RAX: 0000000000000000 RBX: 0000000020000398 RCX: 0000000000000038
RDX: 0000000000000000 RSI: ffffc900166873e0 RDI: 0000000020000360
RBP: ffffc90016687498 R08: ffffc90016687417 R09: 1ffff92002cd0e82
R10: dffffc0000000000 R11: fffff52002cd0e83 R12: 0000000000000038
R13: ffffc900166873e0 R14: 0000000020000360 R15: ffffc900166873e0
copy_user_generic arch/x86/include/asm/uaccess_64.h:112 [inline]
raw_copy_to_user arch/x86/include/asm/uaccess_64.h:133 [inline]
_copy_to_user+0x86/0xa0 lib/usercopy.c:41
copy_to_user include/linux/uaccess.h:191 [inline]
fiemap_fill_next_extent+0x235/0x410 fs/ioctl.c:145
emit_fiemap_extent+0x258/0x410 fs/btrfs/extent_io.c:2476
fiemap_process_hole+0xa29/0xaf0 fs/btrfs/extent_io.c:2734
extent_fiemap+0xeae/0x1fe0
btrfs_fiemap+0x178/0x1e0 fs/btrfs/inode.c:7830
ioctl_fiemap fs/ioctl.c:220 [inline]
do_vfs_ioctl+0x19ea/0x2b40 fs/ioctl.c:811
__do_sys_ioctl fs/ioctl.c:869 [inline]
__se_sys_ioctl+0x81/0x170 fs/ioctl.c:857
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x45/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7ffb2f27cba9
RSP: 002b:00007ffb2ff030c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ffb2f39bf80 RCX: 00007ffb2f27cba9
RDX: 0000000020000340 RSI: 00000000c020660b RDI: 0000000000000004
RBP: 00007ffb2f2c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007ffb2f39bf80 R15: 00007ffeca5b9818
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8d92d060 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
#0: ffffffff8d92d060 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
#0: ffffffff8d92d060 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
2 locks held by kworker/u4:6/1268:
2 locks held by getty/4814:
#0: ffff88807c9780a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b4/0x1e10 drivers/tty/n_tty.c:2201
6 locks held by kworker/u4:0/2781:
3 locks held by syz-executor.2/20905:
#0: ffff88801c4c6d18 (&vma->vm_lock->lock){++++}-{3:3}, at: vma_start_read include/linux/mm.h:663 [inline]
#0: ffff88801c4c6d18 (&vma->vm_lock->lock){++++}-{3:3}, at: lock_vma_under_rcu+0x2f6/0x6f0 mm/memory.c:5500
#1: ffff888032f80510 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x197/0x470 mm/memory.c:2943
#2: ffff888038202930 (&ei->i_mmap_lock){++++}-{3:3}, at: btrfs_page_mkwrite+0x49c/0xd10 fs/btrfs/inode.c:8147
4 locks held by syz-executor.2/20906:
#0: ffff888038202aa8 (&sb->s_type->i_mutex_key#23){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:812 [inline]
#0: ffff888038202aa8 (&sb->s_type->i_mutex_key#23){++++}-{3:3}, at: btrfs_inode_lock+0x60/0xd0 fs/btrfs/inode.c:370
#1: ffff88802a045720 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:165 [inline]
#1: ffff88802a045720 (&mm->mmap_lock){++++}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:5371 [inline]
#1: ffff88802a045720 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x32/0x2d0 mm/memory.c:5431
#2: ffff888032f80510 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x197/0x470 mm/memory.c:2943
#3: ffff888038202930 (&ei->i_mmap_lock){++++}-{3:3}, at: btrfs_page_mkwrite+0x49c/0xd10 fs/btrfs/inode.c:8147
1 lock held by udevadm/23473:
1 lock held by udevadm/23475:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.7.0-rc4-syzkaller-00039-g9ace34a8e446 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x498/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x310 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xfaf/0xff0 kernel/hung_task.c:379
kthread+0x2d3/0x370 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 23475 Comm: udevadm Not tainted 6.7.0-rc4-syzkaller-00039-g9ace34a8e446 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
RIP: 0010:__lock_acquire+0xe80/0x1fd0
Code: c3 4c 89 e0 48 c1 e8 20 29 c3 89 c1 c1 c1 04 31 d9 44 01 e0 41 29 cc 89 ca c1 c2 06 44 31 e2 01 c1 29 d0 89 d6 c1 c6 08 31 c6 <01> ca 29 f1 89 f3 c1 c3 10 31 cb 01 d6 29 da 89 dd c1 c5 13 31 d5
RSP: 0018:ffffc90004d47a90 EFLAGS: 00000086
RAX: 0000000000084b6a RBX: 00000000000021ab RCX: 00000000ffffde52
RDX: 00000000fff7b494 RSI: 00000000f7bcdf95 RDI: dffffc0000000000
RBP: ffff888021b16400 R08: ffffffff90dd7397 R09: 1ffffffff21bae72
R10: dffffc0000000000 R11: fffffbfff21bae73 R12: 00000000000021ab
R13: ffff888021b15940 R14: 0000000000000001 R15: ffff888021b15940
FS: 00007fa54cf57c80(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbbedefe000 CR3: 0000000034f9a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire+0x1e3/0x530 kernel/locking/lockdep.c:5754
__might_fault+0xc1/0x120 mm/memory.c:5955
strncpy_from_user+0x31/0x2e0 lib/strncpy_from_user.c:117
getname_flags+0xf9/0x4f0 fs/namei.c:151
user_path_at_empty+0x2c/0x60 fs/namei.c:2910
do_readlinkat+0x118/0x3b0 fs/stat.c:494
__do_sys_readlink fs/stat.c:527 [inline]
__se_sys_readlink fs/stat.c:524 [inline]
__x64_sys_readlink+0x7f/0x90 fs/stat.c:524
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x45/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fa54cb17d47
Code: 73 01 c3 48 8b 0d e1 90 0d 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 59 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d b1 90 0d 00 f7 d8 64 89 01 48
RSP: 002b:00007fff7a46fb08 EFLAGS: 00000246 ORIG_RAX: 0000000000000059
RAX: ffffffffffffffda RBX: 00007fff7a46fb18 RCX: 00007fa54cb17d47
RDX: 0000000000000400 RSI: 00007fff7a46fb18 RDI: 00007fff7a46fff8
RBP: 0000000000000400 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000010f R11: 0000000000000246 R12: 00007fff7a46fff8
R13: 00007fff7a46ff68 R14: 000055ff43d43910 R15: 000055ff43d43a60