INFO: task syz-executor.0:30718 blocked for more than 143 seconds.
Not tainted 6.7.0-rc4-syzkaller-00358-gf2e8a57ee903 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:25040 pid:30718 tgid:30718 ppid:5092 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:2944
wp_page_shared mm/memory.c:3339 [inline]
do_wp_page+0x1d07/0x4d40 mm/memory.c:3479
handle_pte_fault mm/memory.c:5055 [inline]
__handle_mm_fault mm/memory.c:5180 [inline]
handle_mm_fault+0x1b1c/0x6680 mm/memory.c:5345
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: 0033:0x7f1f8485dc1d
RSP: 002b:00007fffc4b63c78 EFLAGS: 00010202
RAX: 0000000020000000 RBX: 00007fffc4b63d88 RCX: 00007f1f8440002e
RDX: 0000000000000002 RSI: 000000000000002e RDI: 0000000020000000
RBP: 0000000000000032 R08: 00007f1f84800000 R09: 000000000000000a
R10: 000000008133c114 R11: 0000000000000246 R12: 00007f1f84405770
R13: fffffffffffffffe R14: 00007f1f84400000 R15: 00007f1f84405778
INFO: task syz-executor.0:30719 blocked for more than 144 seconds.
Not tainted 6.7.0-rc4-syzkaller-00358-gf2e8a57ee903 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:23256 pid:30719 tgid:30718 ppid:5092 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:2944
wp_page_shared mm/memory.c:3339 [inline]
do_wp_page+0x1d07/0x4d40 mm/memory.c:3479
handle_pte_fault mm/memory.c:5055 [inline]
__handle_mm_fault mm/memory.c:5180 [inline]
handle_mm_fault+0x1b1c/0x6680 mm/memory.c:5345
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:ffffc9000484f330 EFLAGS: 00050206
RAX: 0000000000000000 RBX: 0000000020000218 RCX: 0000000000000038
RDX: 0000000000000000 RSI: ffffc9000484f3e0 RDI: 00000000200001e0
RBP: ffffc9000484f498 R08: ffffc9000484f417 R09: 1ffff92000909e82
R10: dffffc0000000000 R11: fffff52000909e83 R12: 0000000000000038
R13: ffffc9000484f3e0 R14: 00000000200001e0 R15: ffffc9000484f3e0
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: 0033:0x7f1f8487cba9
RSP: 002b:00007f1f8558c0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f1f8499bf80 RCX: 00007f1f8487cba9
RDX: 00000000200001c0 RSI: 00000000c020660b RDI: 0000000000000004
RBP: 00007f1f848c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f1f8499bf80 R15: 00007fffc4b63b98
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/1:1H/96:
2 locks held by getty/4810:
#0: ffff88802659e0a0 (&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
1 lock held by syz-executor.1/5093:
1 lock held by syz-executor.3/5109:
2 locks held by kworker/u4:10/8122:
2 locks held by kworker/u4:6/18794:
2 locks held by kworker/1:3/22021:
#0: ffff888012c72938 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2602 [inline]
#0: ffff888012c72938 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2700
#1: ffffc9000825fd20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2602 [inline]
#1: ffffc9000825fd20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2700
1 lock held by syz-executor.5/22125:
3 locks held by syz-executor.0/30718:
#0: ffff8880314b7658 (&vma->vm_lock->lock){++++}-{3:3}, at: vma_start_read include/linux/mm.h:663 [inline]
#0: ffff8880314b7658 (&vma->vm_lock->lock){++++}-{3:3}, at: lock_vma_under_rcu+0x2f6/0x6f0 mm/memory.c:5501
#1: ffff88801b96e510 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x197/0x470 mm/memory.c:2944
#2: ffff88807772ea28 (&ei->i_mmap_lock){++++}-{3:3}, at: btrfs_page_mkwrite+0x49c/0xd10 fs/btrfs/inode.c:8147
4 locks held by syz-executor.0/30719:
#0: ffff88807772eba0 (&sb->s_type->i_mutex_key#21){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:812 [inline]
#0: ffff88807772eba0 (&sb->s_type->i_mutex_key#21){++++}-{3:3}, at: btrfs_inode_lock+0x60/0xd0 fs/btrfs/inode.c:370
#1: ffff88802a9a9e20 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:165 [inline]
#1: ffff88802a9a9e20 (&mm->mmap_lock){++++}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:5372 [inline]
#1: ffff88802a9a9e20 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x32/0x2d0 mm/memory.c:5432
#2: ffff88801b96e510 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x197/0x470 mm/memory.c:2944
#3: ffff88807772ea28 (&ei->i_mmap_lock){++++}-{3:3}, at: btrfs_page_mkwrite+0x49c/0xd10 fs/btrfs/inode.c:8147
1 lock held by udevd/31925:
1 lock held by udevd/32240:
#0: ffff88801b083740 (mapping.invalidate_lock#2){.+.+}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:857 [inline]
#0: ffff88801b083740 (mapping.invalidate_lock#2){.+.+}-{3:3}, at: page_cache_ra_unbounded+0xf1/0x7c0 mm/readahead.c:225
4 locks held by syz-executor.4/32698:
1 lock held by syz-executor.1/32751:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.7.0-rc4-syzkaller-00358-gf2e8a57ee903 #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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 18794 Comm: kworker/u4:6 Not tainted 6.7.0-rc4-syzkaller-00358-gf2e8a57ee903 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
Workqueue: bat_events batadv_nc_worker
RIP: 0010:lookup_chain_cache_add kernel/locking/lockdep.c:3782 [inline]
RIP: 0010:validate_chain+0x1c1/0x5ab0 kernel/locking/lockdep.c:3837
Code: 0f af c6 48 c1 e8 2f 48 8d 1c c5 e0 82 c9 90 48 89 d8 48 c1 e8 03 48 89 44 24 60 42 80 3c 20 00 74 08 48 89 df e8 ff ac 7c 00 <48> 89 5c 24 20 48 8b 1b 48 85 db 74 48 48 83 c3 f8 74 42 4c 8d 7b
RSP: 0018:ffffc9000352f580 EFLAGS: 00000046
RAX: 1ffffffff2198733 RBX: ffffffff90cc3998 RCX: ffffffff816dd67c
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff90dd8438
RBP: ffffc9000352f880 R08: ffffffff90dd843f R09: 1ffffffff21bb087
R10: dffffc0000000000 R11: fffffbfff21bb088 R12: dffffc0000000000
R13: ffff888023bed940 R14: 03da8420229a181e R15: ffff888023bed940
FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055a696eb7510 CR3: 000000002f7b2000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__lock_acquire+0x1345/0x1fd0 kernel/locking/lockdep.c:5137
lock_acquire+0x1e3/0x530 kernel/locking/lockdep.c:5754
__raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline]
_raw_spin_lock_bh+0x35/0x50 kernel/locking/spinlock.c:178
spin_lock_bh include/linux/spinlock.h:356 [inline]
batadv_nc_purge_paths+0xe8/0x3a0 net/batman-adv/network-coding.c:442
batadv_nc_worker+0x328/0x610 net/batman-adv/network-coding.c:720
process_one_work kernel/workqueue.c:2627 [inline]
process_scheduled_works+0x90f/0x1420 kernel/workqueue.c:2700
worker_thread+0xa5f/0x1000 kernel/workqueue.c:2781
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