INFO: task kworker/u4:22:24050 blocked for more than 143 seconds.
Not tainted 6.3.0-rc4-syzkaller-00224-g00c7b5f4ddc5 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:22 state:D stack:23872 pid:24050 ppid:2 flags:0x00004000
Workqueue: writeback wb_workfn (flush-btrfs-338)
Call Trace:
context_switch kernel/sched/core.c:5307 [inline]
__schedule+0x173b/0x4630 kernel/sched/core.c:6625
schedule+0xc3/0x180 kernel/sched/core.c:6701
io_schedule+0x8c/0x100 kernel/sched/core.c:8887
folio_wait_bit_common+0x86c/0x12b0 mm/filemap.c:1301
folio_lock include/linux/pagemap.h:952 [inline]
extent_write_cache_pages fs/btrfs/extent_io.c:2615 [inline]
extent_writepages+0xa65/0x1930 fs/btrfs/extent_io.c:2755
do_writepages+0x3a6/0x670 mm/page-writeback.c:2551
__writeback_single_inode+0x155/0xfb0 fs/fs-writeback.c:1600
writeback_sb_inodes+0x8ef/0x11d0 fs/fs-writeback.c:1891
__writeback_inodes_wb+0x11b/0x260 fs/fs-writeback.c:1962
wb_writeback+0x46c/0xc70 fs/fs-writeback.c:2067
wb_check_background_flush fs/fs-writeback.c:2133 [inline]
wb_do_writeback fs/fs-writeback.c:2221 [inline]
wb_workfn+0xc6f/0xff0 fs/fs-writeback.c:2248
process_one_work+0x8a0/0x10e0 kernel/workqueue.c:2390
worker_thread+0xa63/0x1210 kernel/workqueue.c:2537
kthread+0x270/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
INFO: task syz-executor.5:26370 blocked for more than 144 seconds.
Not tainted 6.3.0-rc4-syzkaller-00224-g00c7b5f4ddc5 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:27304 pid:26370 ppid:5104 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5307 [inline]
__schedule+0x173b/0x4630 kernel/sched/core.c:6625
schedule+0xc3/0x180 kernel/sched/core.c:6701
io_schedule+0x8c/0x100 kernel/sched/core.c:8887
folio_wait_bit_common+0x86c/0x12b0 mm/filemap.c:1301
btrfs_page_mkwrite+0x42d/0xc90 fs/btrfs/inode.c:8153
do_page_mkwrite+0x1a1/0x600 mm/memory.c:2925
wp_page_shared mm/memory.c:3274 [inline]
do_wp_page+0x501/0x3620 mm/memory.c:3356
handle_pte_fault mm/memory.c:4927 [inline]
__handle_mm_fault mm/memory.c:5051 [inline]
handle_mm_fault+0x23a0/0x51c0 mm/memory.c:5197
do_user_addr_fault arch/x86/mm/fault.c:1407 [inline]
handle_page_fault arch/x86/mm/fault.c:1498 [inline]
exc_page_fault+0x5b1/0x7c0 arch/x86/mm/fault.c:1554
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x7f052482bd79
RSP: 002b:00007ffee39abd60 EFLAGS: 00010246
RAX: 0000000020000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000555555cf02e8
RBP: 00007ffee39abe58 R08: 0000000000000000 R09: 0000000000000000
R10: 00007f0524405d88 R11: 0000000000000246 R12: 00000000000e5f13
R13: 00007ffee39abe80 R14: 00007f05249ac120 R15: 0000000000000032
INFO: task syz-executor.5:26371 blocked for more than 145 seconds.
Not tainted 6.3.0-rc4-syzkaller-00224-g00c7b5f4ddc5 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:23224 pid:26371 ppid:5104 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5307 [inline]
__schedule+0x173b/0x4630 kernel/sched/core.c:6625
schedule+0xc3/0x180 kernel/sched/core.c:6701
wait_on_state fs/btrfs/extent-io-tree.c:707 [inline]
wait_extent_bit+0x50c/0x670 fs/btrfs/extent-io-tree.c:751
lock_extent+0x1ce/0x280 fs/btrfs/extent-io-tree.c:1742
btrfs_page_mkwrite+0x554/0xc90 fs/btrfs/inode.c:8163
do_page_mkwrite+0x1a1/0x600 mm/memory.c:2925
wp_page_shared mm/memory.c:3274 [inline]
do_wp_page+0x501/0x3620 mm/memory.c:3356
handle_pte_fault mm/memory.c:4927 [inline]
__handle_mm_fault mm/memory.c:5051 [inline]
handle_mm_fault+0x23a0/0x51c0 mm/memory.c:5197
do_user_addr_fault arch/x86/mm/fault.c:1407 [inline]
handle_page_fault arch/x86/mm/fault.c:1498 [inline]
exc_page_fault+0x5b1/0x7c0 arch/x86/mm/fault.c:1554
asm_exc_page_fault+0x26/0x30 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:ffffc9001657f550 EFLAGS: 00050202
RAX: ffffffff842ffa01 RBX: 00007fffffffefc8 RCX: 0000000000000007
RDX: 0000000000000000 RSI: ffffc9001657f600 RDI: 0000000020000160
RBP: ffffc9001657f6b0 R08: 0000000000000000 R09: fffff52002cafec7
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000038
R13: ffffc9001657f600 R14: 0000000020000160 R15: ffffc9001657f600
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+0xed/0x130 lib/usercopy.c:41
copy_to_user include/linux/uaccess.h:169 [inline]
fiemap_fill_next_extent+0x235/0x410 fs/ioctl.c:144
emit_last_fiemap_cache fs/btrfs/extent_io.c:3036 [inline]
extent_fiemap+0x1bf9/0x2150 fs/btrfs/extent_io.c:3563
btrfs_fiemap+0x178/0x1e0 fs/btrfs/inode.c:7835
ioctl_fiemap fs/ioctl.c:219 [inline]
do_vfs_ioctl+0x19ba/0x2b10 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:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f052488c0f9
RSP: 002b:00007f05256ad168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f05249abf80 RCX: 00007f052488c0f9
RDX: 0000000020000140 RSI: 00000000c020660b RDI: 0000000000000005
RBP: 00007f05248e7b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffee39abd1f R14: 00007f05256ad300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8cf25530 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:510
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8cf25d30 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:510
1 lock held by khungtaskd/28:
#0: ffffffff8cf25360 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by kworker/u4:4/56:
2 locks held by getty/4751:
#0: ffff888027c4f098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc900015902f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ab/0x1db0 drivers/tty/n_tty.c:2177
1 lock held by syz-executor.3/5107:
3 locks held by kworker/u4:22/24050:
#0: ffff8880177e3938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2363
#1: ffffc9000ab67d20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2365
#2: ffff88807edfe0e0 (&type->s_umount_key#54){++++}-{3:3}, at: trylock_super+0x1f/0xf0 fs/super.c:414
3 locks held by syz-executor.5/26370:
#0: ffff88807a75a598 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline]
#0: ffff88807a75a598 (&mm->mmap_lock){++++}-{3:3}, at: do_user_addr_fault arch/x86/mm/fault.c:1348 [inline]
#0: ffff88807a75a598 (&mm->mmap_lock){++++}-{3:3}, at: handle_page_fault arch/x86/mm/fault.c:1498 [inline]
#0: ffff88807a75a598 (&mm->mmap_lock){++++}-{3:3}, at: exc_page_fault+0x18e/0x7c0 arch/x86/mm/fault.c:1554
#1: ffff88807edfe558 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x1a1/0x600 mm/memory.c:2925
#2: ffff8880335fc588 (&ei->i_mmap_lock){++++}-{3:3}, at: btrfs_page_mkwrite+0x425/0xc90 fs/btrfs/inode.c:8152
4 locks held by syz-executor.5/26371:
#0: ffff8880335fc700 (&sb->s_type->i_mutex_key#21){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline]
#0: ffff8880335fc700 (&sb->s_type->i_mutex_key#21){++++}-{3:3}, at: btrfs_inode_lock+0x60/0xd0 fs/btrfs/inode.c:169
#1: ffff88807a75a598 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline]
#1: ffff88807a75a598 (&mm->mmap_lock){++++}-{3:3}, at: do_user_addr_fault arch/x86/mm/fault.c:1348 [inline]
#1: ffff88807a75a598 (&mm->mmap_lock){++++}-{3:3}, at: handle_page_fault arch/x86/mm/fault.c:1498 [inline]
#1: ffff88807a75a598 (&mm->mmap_lock){++++}-{3:3}, at: exc_page_fault+0x18e/0x7c0 arch/x86/mm/fault.c:1554
#2: ffff88807edfe558 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x1a1/0x600 mm/memory.c:2925
#3: ffff8880335fc588 (&ei->i_mmap_lock){++++}-{3:3}, at: btrfs_page_mkwrite+0x425/0xc90 fs/btrfs/inode.c:8152
2 locks held by syz-executor.4/27697:
2 locks held by syz-executor.5/27700:
3 locks held by syz-executor.0/27703:
3 locks held by syz-executor.3/27707:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.3.0-rc4-syzkaller-00224-g00c7b5f4ddc5 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
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+0x187/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xec2/0xf00 kernel/hung_task.c:379
kthread+0x270/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4417 Comm: syslogd Not tainted 6.3.0-rc4-syzkaller-00224-g00c7b5f4ddc5 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
RIP: 0010:preempt_latency_start kernel/sched/core.c:5755 [inline]
RIP: 0010:preempt_count_add+0x82/0x180 kernel/sched/core.c:5781
Code: d9 00 00 00 83 3d 8d 75 4f 10 00 75 11 65 8b 05 2c 79 a5 7e 0f b6 c0 3d f5 00 00 00 73 59 65 8b 05 1b 79 a5 7e 25 ff ff ff 7f <39> d8 75 43 4c 8b 74 24 18 4c 89 f7 e8 9d 0f 0d 00 85 c0 74 0a 45
RSP: 0018:ffffc9000255f7e0 EFLAGS: 00000002
RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff91adb003
RDX: 0000000000000000 RSI: ffffffff8b37fe60 RDI: 0000000000000001
RBP: ffffc9000255f890 R08: dffffc0000000000 R09: fffffbfff1ca70e6
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000246
R13: 1ffff920004abf00 R14: ffffffff91dd9850 R15: dffffc0000000000
FS: 00007f82c76a5800(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff6eab06000 CR3: 000000002bdb9000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:109 [inline]
_raw_spin_lock_irqsave+0xba/0x120 kernel/locking/spinlock.c:162
__debug_check_no_obj_freed lib/debugobjects.c:984 [inline]
debug_check_no_obj_freed+0xd6/0x650 lib/debugobjects.c:1027
slab_free_hook mm/slub.c:1756 [inline]
slab_free_freelist_hook mm/slub.c:1807 [inline]
slab_free mm/slub.c:3787 [inline]
kmem_cache_free+0x246/0x520 mm/slub.c:3809
__unix_dgram_recvmsg+0xcb7/0x1260 net/unix/af_unix.c:2532
sock_recvmsg_nosec net/socket.c:1017 [inline]
sock_recvmsg net/socket.c:1038 [inline]
sock_read_iter+0x3a8/0x500 net/socket.c:1116
call_read_iter include/linux/fs.h:1845 [inline]
new_sync_read fs/read_write.c:389 [inline]
vfs_read+0x7e2/0xbe0 fs/read_write.c:470
ksys_read+0x1a0/0x2c0 fs/read_write.c:613
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f82c78318fe
Code: c0 e9 e6 fe ff ff 50 48 8d 3d 0e c7 09 00 e8 c9 cf 01 00 66 0f 1f 84 00 00 00 00 00 64 8b 04 25 18 00 00 00 85 c0 75 14 0f 05 <48> 3d 00 f0 ff ff 77 5a c3 66 0f 1f 84 00 00 00 00 00 48 83 ec 28
RSP: 002b:00007ffe3c6e8358 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f82c78318fe
RDX: 00000000000000ff RSI: 0000563915e56950 RDI: 0000000000000000
RBP: 0000563915e56910 R08: 00007f82c78c1040 R09: 00007f82c78c10c0
R10: 00007f82c78c0fc0 R11: 0000000000000246 R12: 0000563915e569a0
R13: 0000563915e56950 R14: 0000000000000000 R15: 0000000000000000