INFO: task syz.8.570:11239 blocked for more than 143 seconds.
Not tainted 6.14.0-rc3-syzkaller-00060-g6537cfb395f3 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.8.570 state:D stack:23872 pid:11239 tgid:11238 ppid:10484 task_flags:0x400140 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5378 [inline]
__schedule+0x18bc/0x4c40 kernel/sched/core.c:6765
__schedule_loop kernel/sched/core.c:6842 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6857
percpu_rwsem_wait+0x3c2/0x450 kernel/locking/percpu-rwsem.c:162
__percpu_down_read+0xee/0x130 kernel/locking/percpu-rwsem.c:177
percpu_down_read include/linux/percpu-rwsem.h:65 [inline]
__sb_start_write include/linux/fs.h:1785 [inline]
sb_start_write+0x184/0x1c0 include/linux/fs.h:1921
mnt_want_write+0x3f/0x90 fs/namespace.c:547
do_renameat2+0x4fe/0x13f0 fs/namei.c:5156
__do_sys_renameat2 fs/namei.c:5260 [inline]
__se_sys_renameat2 fs/namei.c:5257 [inline]
__x64_sys_renameat2+0xce/0xe0 fs/namei.c:5257
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f674ed8cde9
RSP: 002b:00007f674fc2f038 EFLAGS: 00000246 ORIG_RAX: 000000000000013c
RAX: ffffffffffffffda RBX: 00007f674efa5fa0 RCX: 00007f674ed8cde9
RDX: ffffffffffffff9c RSI: 0000400000000580 RDI: ffffffffffffff9c
RBP: 00007f674ee0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 00004000000005c0 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f674efa5fa0 R15: 00007ffcdc091268
Showing all locks held in the system:
1 lock held by ksoftirqd/1/24:
1 lock held by khungtaskd/30:
#0: ffffffff8eb38f60 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8eb38f60 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8eb38f60 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6746
2 locks held by getty/5592:
#0: ffff8880317bc0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002fde2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x616/0x1770 drivers/tty/n_tty.c:2211
1 lock held by udevd/5841:
#0: ffff8880b873e7d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:598
1 lock held by syz.8.570/11239:
#0: ffff8880705b6420 (sb_writers#31){++++}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:547
2 locks held by syz-executor/13383:
#0: ffffffff8f256fa8 (bio_slab_lock){+.+.}-{4:4}, at: bio_put_slab block/bio.c:140 [inline]
#0: ffffffff8f256fa8 (bio_slab_lock){+.+.}-{4:4}, at: bioset_exit+0x42f/0x650 block/bio.c:1662
#1: ffffffff8eb3e300 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3741
5 locks held by kworker/u8:16/14122:
#0: ffff8880b873e7d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:598
#1: ffff88801c7d8a28 (&p->pi_lock){-.-.}-{2:2}, at: class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:551 [inline]
#1: ffff88801c7d8a28 (&p->pi_lock){-.-.}-{2:2}, at: try_to_wake_up+0xc2/0x1470 kernel/sched/core.c:4214
#2: ffff8880b873e7d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:598
#3: ffff8880b8728948 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_change+0xed/0x270 kernel/sched/psi.c:912
#4: ffffffff9a8c6f40 (&obj_hash[i].lock){-.-.}-{2:2}, at: __debug_check_no_obj_freed lib/debugobjects.c:1088 [inline]
#4: ffffffff9a8c6f40 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_check_no_obj_freed+0x234/0x580 lib/debugobjects.c:1129
3 locks held by kworker/u8:17/14123:
2 locks held by kworker/u8:19/14125:
3 locks held by syz.6.915/14364:
#0: ffff888024cba0e0 (&type->s_umount_key#64/1){+.+.}-{4:4}, at: alloc_super+0x221/0x9d0 fs/super.c:344
#1: ffff8880679022d0 (&root->objectid_mutex){+.+.}-{4:4}, at: btrfs_init_fs_root fs/btrfs/disk-io.c:1136 [inline]
#1: ffff8880679022d0 (&root->objectid_mutex){+.+.}-{4:4}, at: btrfs_get_root_ref+0x5cf/0xc30 fs/btrfs/disk-io.c:1365
#2: ffff8880b863e7d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:598
1 lock held by syz.1.922/14381:
#0: ffffffff8eb3e438 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:334 [inline]
#0: ffffffff8eb3e438 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x451/0x820 kernel/rcu/tree_exp.h:996
1 lock held by udevadm/14409:
3 locks held by dhcpcd-run-hook/14419:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.14.0-rc3-syzkaller-00060-g6537cfb395f3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:236 [inline]
watchdog+0x1058/0x10a0 kernel/hung_task.c:399
kthread+0x7a9/0x920 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 14363 Comm: syz.6.915 Not tainted 6.14.0-rc3-syzkaller-00060-g6537cfb395f3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:unwind_next_frame+0xb01/0x22d0 arch/x86/kernel/unwind_orc.c:581
Code: 48 0f bf 02 48 01 04 24 49 8d 6f 01 48 8b 44 24 70 42 0f b6 04 20 84 c0 0f 85 39 11 00 00 48 89 eb 48 c1 eb 03 42 0f b6 04 23 <84> c0 0f 85 45 11 00 00 41 0f b6 77 01 83 e6 07 83 fe 04 0f 84 e6
RSP: 0018:ffffc900049e7170 EFLAGS: 00000a03
RAX: 0000000000000000 RBX: 1ffffffff2188c1c RCX: ffffffff904df648
RDX: ffffffff90c460e0 RSI: ffffffff90c460e0 RDI: ffffffff816d1530
RBP: ffffffff90c460e5 R08: 0000000000000007 R09: 0000000000000000
R10: ffffc900049e72f0 R11: fffff5200093ce60 R12: dffffc0000000000
R13: ffffc900049e72a0 R14: ffffc900049e72d8 R15: ffffffff90c460e4
FS: 0000555568586500(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1e44b92290 CR3: 0000000034c1c000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__unwind_start+0x59a/0x740 arch/x86/kernel/unwind_orc.c:760
unwind_start arch/x86/include/asm/unwind.h:64 [inline]
arch_stack_walk+0xe5/0x150 arch/x86/kernel/stacktrace.c:24
stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:319 [inline]
__kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:345
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4115 [inline]
kmem_cache_alloc_bulk_noprof+0x4fa/0x7c0 mm/slub.c:5125
mt_alloc_bulk lib/maple_tree.c:181 [inline]
mas_alloc_nodes+0x38e/0x7e0 lib/maple_tree.c:1275
mas_node_count_gfp lib/maple_tree.c:1335 [inline]
mas_preallocate+0x575/0x8d0 lib/maple_tree.c:5505
vma_iter_prealloc mm/vma.h:353 [inline]
__split_vma+0x2f6/0xbf0 mm/vma.c:479
split_vma mm/vma.c:542 [inline]
vma_modify+0x144/0x330 mm/vma.c:1521
vma_modify_flags+0x3a5/0x430 mm/vma.c:1547
mprotect_fixup+0x45a/0xaa0 mm/mprotect.c:666
do_mprotect_pkey+0x99d/0xdd0 mm/mprotect.c:840
__do_sys_mprotect mm/mprotect.c:861 [inline]
__se_sys_mprotect mm/mprotect.c:858 [inline]
__x64_sys_mprotect+0x80/0x90 mm/mprotect.c:858
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f451718cea7
Code: 73 01 c3 48 c7 c1 a8 ff ff ff 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 0a 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd6f286628 EFLAGS: 00000206 ORIG_RAX: 000000000000000a
RAX: ffffffffffffffda RBX: 00007f451801b6c0 RCX: 00007f451718cea7
RDX: 0000000000000003 RSI: 0000000000020000 RDI: 00007f4517ffc000
RBP: 0000000000000000 R08: 00000000ffffffff R09: 0000000000000000
R10: 0000000000021000 R11: 0000000000000206 R12: 00007ffd6f286780
R13: ffffffffffffffc0 R14: 0000000000001000 R15: 0000000000000000