INFO: task syz.8.277:8444 blocked for more than 143 seconds.
Not tainted 6.13.0-rc1-syzkaller-00239-g9a6e8c7c3a02 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.8.277 state:D stack:22336 pid:8444 tgid:8358 ppid:7315 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0x17fb/0x4be0 kernel/sched/core.c:6756
__schedule_loop kernel/sched/core.c:6833 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6848
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6905
rwsem_down_write_slowpath+0xeee/0x13b0 kernel/locking/rwsem.c:1176
__down_write_common kernel/locking/rwsem.c:1304 [inline]
__down_write kernel/locking/rwsem.c:1313 [inline]
down_write+0x1d7/0x220 kernel/locking/rwsem.c:1578
inode_lock include/linux/fs.h:818 [inline]
lock_two_nondirectories+0xe1/0x170 fs/inode.c:1281
vfs_rename+0x6a2/0xf00 fs/namei.c:5038
do_renameat2+0xd94/0x13f0 fs/namei.c:5224
__do_sys_rename fs/namei.c:5271 [inline]
__se_sys_rename fs/namei.c:5269 [inline]
__x64_sys_rename+0x82/0x90 fs/namei.c:5269
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: 0033:0x7fbe1957fed9
RSP: 002b:00007fbe1a2dd058 EFLAGS: 00000246 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 00007fbe19746080 RCX: 00007fbe1957fed9
RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000020000000
RBP: 00007fbe195f3cc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fbe19746080 R15: 00007fff79103b98
Showing all locks held in the system:
5 locks held by kworker/u8:1/12:
1 lock held by khungtaskd/30:
#0: ffffffff8e937aa0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e937aa0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e937aa0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6744
3 locks held by kworker/u8:4/73:
#0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
#0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3310
#1: ffffc9000218fd00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
#1: ffffc9000218fd00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3310
#2: ffffffff8fc9d608 (rtnl_mutex){+.+.}-{4:4}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:281
1 lock held by klogd/5184:
#0: ffff8880b863e758 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:598
1 lock held by dhcpcd/5489:
#0: ffffffff8fc9d608 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8fc9d608 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:326 [inline]
#0: ffffffff8fc9d608 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0xbb0/0x20e0 net/core/rtnetlink.c:4008
2 locks held by getty/5578:
#0: ffff88803569a0a0 (&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+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
3 locks held by kworker/1:3/5825:
#0: ffff88801ac80948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
#0: ffff88801ac80948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3310
#1: ffffc90003f7fd00 (deferred_process_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
#1: ffffc90003f7fd00 (deferred_process_work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3310
#2: ffffffff8fc9d608 (rtnl_mutex){+.+.}-{4:4}, at: switchdev_deferred_process_work+0xe/0x20 net/switchdev/switchdev.c:104
5 locks held by syz.8.277/8359:
#0: ffff88806157a420 (sb_writers#23){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:515
#1: ffff8880779e53c8 (&sb->s_type->i_mutex_key#30){++++}-{4:4}, at: inode_lock include/linux/fs.h:818 [inline]
#1: ffff8880779e53c8 (&sb->s_type->i_mutex_key#30){++++}-{4:4}, at: do_truncate+0x20c/0x310 fs/open.c:63
#2: ffff88806d280a38 (&c->snapshot_create_lock){.+.+}-{4:4}, at: bch2_truncate+0x166/0x2d0 fs/bcachefs/io_misc.c:292
#3: ffff88806d284398 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:158 [inline]
#3: ffff88806d284398 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:249 [inline]
#3: ffff88806d284398 (&c->btree_trans_barrier){.+.+}-{0:0}, at: __bch2_trans_get+0x7e1/0xd30 fs/bcachefs/btree_iter.c:3228
#4: ffff88806d2a66d0 (&c->gc_lock){++++}-{4:4}, at: bch2_btree_update_start+0x682/0x14e0 fs/bcachefs/btree_update_interior.c:1197
3 locks held by syz.8.277/8444:
#0: ffff88806157a420 (sb_writers#23){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:515
#1: ffff8880779e4c48 (&sb->s_type->i_mutex_key#30/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:853 [inline]
#1: ffff8880779e4c48 (&sb->s_type->i_mutex_key#30/1){+.+.}-{4:4}, at: lock_rename fs/namei.c:3215 [inline]
#1: ffff8880779e4c48 (&sb->s_type->i_mutex_key#30/1){+.+.}-{4:4}, at: do_renameat2+0x62c/0x13f0 fs/namei.c:5159
#2: ffff8880779e53c8 (&sb->s_type->i_mutex_key#30){++++}-{4:4}, at: inode_lock include/linux/fs.h:818 [inline]
#2: ffff8880779e53c8 (&sb->s_type->i_mutex_key#30){++++}-{4:4}, at: lock_two_nondirectories+0xe1/0x170 fs/inode.c:1281
1 lock held by syz-executor/9724:
#0: ffff88802bab20e0 (&type->s_umount_key#83){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88802bab20e0 (&type->s_umount_key#83){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88802bab20e0 (&type->s_umount_key#83){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
1 lock held by syz-executor/10813:
#0: ffffffff8fc9d608 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8fc9d608 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:326 [inline]
#0: ffffffff8fc9d608 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0xbb0/0x20e0 net/core/rtnetlink.c:4008
6 locks held by syz.5.557/10936:
3 locks held by syz.5.557/10971:
2 locks held by syz.3.559/10935:
3 locks held by syz.8.560/10943:
2 locks held by syz.8.560/10957:
#0:
ffff88802a520420 (sb_writers#43){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:515
#1: ffff888055d88148 (&type->i_mutex_dir_key#28){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:818 [inline]
#1: ffff888055d88148 (&type->i_mutex_dir_key#28){+.+.}-{4:4}, at: chown_common+0x3e1/0x850 fs/open.c:768
3 locks held by udevd/10974:
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.13.0-rc1-syzkaller-00239-g9a6e8c7c3a02 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
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:234 [inline]
watchdog+0xff6/0x1040 kernel/hung_task.c:397
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 2995 Comm: kworker/u8:8 Not tainted 6.13.0-rc1-syzkaller-00239-g9a6e8c7c3a02 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: events_unbound nsim_dev_trap_report_work
RIP: 0010:lockdep_hardirqs_off+0x0/0x110 kernel/locking/lockdep.c:4479
Code: 90 e9 51 ff ff ff e8 4f fd ff ff 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 41 56 53 48 83 ec 10 65 48 8b 04 25 28 00 00 00 48 89
RSP: 0018:ffffc9000c3078a8 EFLAGS: 00000006
RAX: ffff88807d36ab40 RBX: ffffffff81fb651b RCX: 00000000800c000c
RDX: 00000000000c000a RSI: ffffffff00000000 RDI: ffffffff81fb651b
RBP: ffff8880b8646a20 R08: ffffffff94282977 R09: 1ffffffff285052e
R10: dffffc0000000000 R11: fffffbfff285052f R12: ffffea0001f4da80
R13: 0000000000000286 R14: ffff88801eaaa000 R15: ffff88807d36ab40
FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020e27000 CR3: 0000000034ff4000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
trace_hardirqs_off+0x12/0x40 kernel/trace/trace_preemptirq.c:104
___slab_alloc+0x11bb/0x14b0 mm/slub.c:3864
__slab_alloc+0x58/0xa0 mm/slub.c:3905
__slab_alloc_node mm/slub.c:3980 [inline]
slab_alloc_node mm/slub.c:4141 [inline]
kmem_cache_alloc_node_noprof+0x269/0x380 mm/slub.c:4205
__alloc_skb+0x1c3/0x440 net/core/skbuff.c:668
alloc_skb include/linux/skbuff.h:1323 [inline]
nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:748 [inline]
nsim_dev_trap_report drivers/net/netdevsim/dev.c:805 [inline]
nsim_dev_trap_report_work+0x261/0xb50 drivers/net/netdevsim/dev.c:851
process_one_work kernel/workqueue.c:3229 [inline]
process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244