INFO: task syz-executor145:12827 blocked for more than 143 seconds.
Not tainted 6.6.0-rc6-syzkaller-00029-g213f891525c2 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor145 state:D stack:26512 pid:12827 ppid:5074 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0xee1/0x5a10 kernel/sched/core.c:6695
schedule+0xe7/0x1b0 kernel/sched/core.c:6771
wait_on_state fs/btrfs/extent-io-tree.c:719 [inline]
wait_extent_bit+0x578/0x670 fs/btrfs/extent-io-tree.c:763
lock_extent+0x104/0x190 fs/btrfs/extent-io-tree.c:1755
btrfs_page_mkwrite+0x653/0x11e0 fs/btrfs/inode.c:8143
do_page_mkwrite+0x17a/0x380 mm/memory.c:2931
wp_page_shared mm/memory.c:3291 [inline]
do_wp_page+0xc66/0x3420 mm/memory.c:3376
handle_pte_fault mm/memory.c:4994 [inline]
__handle_mm_fault+0x1d1b/0x3e10 mm/memory.c:5119
handle_mm_fault+0x478/0xa00 mm/memory.c:5284
do_user_addr_fault+0x3d1/0x1000 arch/x86/mm/fault.c:1413
handle_page_fault arch/x86/mm/fault.c:1505 [inline]
exc_page_fault+0x5c/0xd0 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 66 2e 0f 1f 84 00 00 00 00 00 66 90 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:ffffc900050e7720 EFLAGS: 00050206
RAX: 0000000000000000 RBX: 0000000000000038 RCX: 0000000000000038
RDX: fffff52000a1cefb RSI: ffffc900050e77a0 RDI: 0000000020000120
RBP: 0000000020000120 R08: 0000000000000000 R09: fffff52000a1cefa
R10: ffffc900050e77d7 R11: 0000000000000000 R12: ffffc900050e77a0
R13: 0000000020000158 R14: 0000000000000000 R15: 0000000000000000
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 lib/usercopy.c:41 [inline]
_copy_to_user+0xa8/0xb0 lib/usercopy.c:34
copy_to_user include/linux/uaccess.h:191 [inline]
fiemap_fill_next_extent+0x232/0x380 fs/ioctl.c:145
emit_fiemap_extent+0x195/0x380 fs/btrfs/extent_io.c:2472
fiemap_process_hole+0x52d/0x620 fs/btrfs/extent_io.c:2730
extent_fiemap+0x12be/0x19f0 fs/btrfs/extent_io.c:2945
btrfs_fiemap+0xe4/0x160 fs/btrfs/inode.c:7815
ioctl_fiemap fs/ioctl.c:220 [inline]
do_vfs_ioctl+0x339/0x1920 fs/ioctl.c:811
__do_sys_ioctl fs/ioctl.c:869 [inline]
__se_sys_ioctl fs/ioctl.c:857 [inline]
__x64_sys_ioctl+0x112/0x210 fs/ioctl.c:857
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f64bccd9bc9
RSP: 002b:00007f64bcc6d218 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f64bcd5f6d8 RCX: 00007f64bccd9bc9
RDX: 0000000020000100 RSI: 00000000c020660b RDI: 0000000000000005
RBP: 00007f64bcd5f6d0 R08: 00007ffd814c52d7 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f64bcd2c270
R13: 61635f65646f6e69 R14: 65646f7475616f6e R15: 7261637369646f6e
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8cba7960 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:303 [inline]
#0: ffffffff8cba7960 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:749 [inline]
#0: ffffffff8cba7960 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6613
2 locks held by getty/4792:
#0: ffff88814bc580a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900020682f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc5/0x1480 drivers/tty/n_tty.c:2206
4 locks held by syz-executor145/12827:
#0: ffff88807185b890 (&sb->s_type->i_mutex_key#15){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:812 [inline]
#0: ffff88807185b890 (&sb->s_type->i_mutex_key#15){++++}-{3:3}, at: btrfs_inode_lock+0xf9/0x100 fs/btrfs/inode.c:369
#1: ffff88801c1e8c60 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:165 [inline]
#1: ffff88801c1e8c60 (&mm->mmap_lock){++++}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:5311 [inline]
#1: ffff88801c1e8c60 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x35/0x760 mm/memory.c:5371
#2: ffff88807845c508 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x17a/0x380 mm/memory.c:2931
#3: ffff88807185b718 (&ei->i_mmap_lock){++++}-{3:3}, at: btrfs_page_mkwrite+0x6e4/0x11e0 fs/btrfs/inode.c:8132
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.6.0-rc6-syzkaller-00029-g213f891525c2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x277/0x380 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x299/0x300 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+0xf87/0x1210 kernel/hung_task.c:379
kthread+0x33c/0x440 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4472 Comm: klogd Not tainted 6.6.0-rc6-syzkaller-00029-g213f891525c2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
RIP: 0010:stack_trace_consume_entry+0x7a/0x160 kernel/stacktrace.c:89
Code: 74 08 3c 03 0f 8e a5 00 00 00 31 c0 3b 6b 08 0f 83 81 00 00 00 48 8d 7b 0c 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 90
RSP: 0018:ffffc9000348f4f8 EFLAGS: 00000a07
RAX: dffffc0000000000 RBX: ffffc9000348f5e0 RCX: 0000000000000000
RDX: 1ffff92000691ebd RSI: ffffffff88280445 RDI: ffffc9000348f5ec
RBP: 0000000000000009 R08: 0000000000000007 R09: 0000000000000000
R10: ffffffff88280445 R11: 0000000000000000 R12: ffffc9000348f520
R13: ffffffff81746dc0 R14: ffffc9000348f5e0 R15: ffff88807d2c4200
FS: 00007fae99e04380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055cccb397028 CR3: 000000007d395000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
arch_stack_walk+0xde/0x170 arch/x86/kernel/stacktrace.c:27
stack_trace_save+0x96/0xd0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
__kasan_slab_alloc+0x81/0x90 mm/kasan/common.c:328
kasan_slab_alloc include/linux/kasan.h:188 [inline]
slab_post_alloc_hook mm/slab.h:762 [inline]
slab_alloc_node mm/slab.c:3237 [inline]
kmem_cache_alloc_node+0x173/0x540 mm/slab.c:3509
__alloc_skb+0x287/0x330 net/core/skbuff.c:640
alloc_skb include/linux/skbuff.h:1286 [inline]
alloc_skb_with_frags+0xe4/0x710 net/core/skbuff.c:6313
sock_alloc_send_pskb+0x7e4/0x970 net/core/sock.c:2795
unix_dgram_sendmsg+0x455/0x1c30 net/unix/af_unix.c:1953
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg+0xd5/0x180 net/socket.c:745
__sys_sendto+0x255/0x340 net/socket.c:2194
__do_sys_sendto net/socket.c:2206 [inline]
__se_sys_sendto net/socket.c:2202 [inline]
__x64_sys_sendto+0xe0/0x1b0 net/socket.c:2202
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fae99f669b5
Code: 8b 44 24 08 48 83 c4 28 48 98 c3 48 98 c3 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 26 45 31 c9 45 31 c0 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 7a 48 8b 15 44 c4 0c 00 f7 d8 64 89 02 48 83
RSP: 002b:00007fff66048398 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fae99f669b5
RDX: 000000000000008b RSI: 000055cccb3950e0 RDI: 0000000000000003
RBP: 000055cccb38e2c0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000004000 R11: 0000000000000246 R12: 0000000000000013
R13: 00007fae9a0f4212 R14: 00007fff66048498 R15: 0000000000000000