INFO: task syz.2.1056:16320 blocked for more than 143 seconds.
Not tainted 6.11.0-rc7-syzkaller-00039-g77f587896757 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.1056 state:D stack:24216 pid:16320 tgid:16319 ppid:15367 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0x17ae/0x4a10 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6621
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:1676 [inline]
sb_start_write+0x184/0x1c0 include/linux/fs.h:1812
mnt_want_write+0x3f/0x90 fs/namespace.c:515
do_renameat2+0x4fe/0x13f0 fs/namei.c:5053
__do_sys_rename fs/namei.c:5170 [inline]
__se_sys_rename fs/namei.c:5168 [inline]
__x64_sys_rename+0x82/0x90 fs/namei.c:5168
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: 0033:0x7fe425f7def9
RSP: 002b:00007fe426d99038 EFLAGS: 00000246 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 00007fe426135f80 RCX: 00007fe425f7def9
RDX: 0000000000000000 RSI: 0000000020000340 RDI: 0000000020002c40
RBP: 00007fe425ff0b76 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fe426135f80 R15: 00007ffecd4a1e28
INFO: task syz.2.1056:16360 blocked for more than 144 seconds.
Not tainted 6.11.0-rc7-syzkaller-00039-g77f587896757 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.1056 state:D stack:25648 pid:16360 tgid:16319 ppid:15367 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0x17ae/0x4a10 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6621
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:1676 [inline]
sb_start_write+0x184/0x1c0 include/linux/fs.h:1812
mnt_want_write+0x3f/0x90 fs/namespace.c:515
open_last_lookups fs/namei.c:3636 [inline]
path_openat+0x779/0x3470 fs/namei.c:3883
do_filp_open+0x235/0x490 fs/namei.c:3913
do_sys_openat2+0x13e/0x1d0 fs/open.c:1416
do_sys_open fs/open.c:1431 [inline]
__do_sys_open fs/open.c:1439 [inline]
__se_sys_open fs/open.c:1435 [inline]
__x64_sys_open+0x225/0x270 fs/open.c:1435
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: 0033:0x7fe425f7def9
RSP: 002b:00007fe426d78038 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007fe426136058 RCX: 00007fe425f7def9
RDX: 0000000000000000 RSI: 0000000000145142 RDI: 0000000020000040
RBP: 00007fe425ff0b76 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fe426136058 R15: 00007ffecd4a1e28
INFO: task syz.2.1056:16375 blocked for more than 144 seconds.
Not tainted 6.11.0-rc7-syzkaller-00039-g77f587896757 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.1056 state:D stack:27392 pid:16375 tgid:16319 ppid:15367 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0x17ae/0x4a10 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6621
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:1676 [inline]
sb_start_write+0x184/0x1c0 include/linux/fs.h:1812
mnt_want_write+0x3f/0x90 fs/namespace.c:515
open_last_lookups fs/namei.c:3636 [inline]
path_openat+0x779/0x3470 fs/namei.c:3883
do_filp_open+0x235/0x490 fs/namei.c:3913
do_sys_openat2+0x13e/0x1d0 fs/open.c:1416
do_sys_open fs/open.c:1431 [inline]
__do_sys_open fs/open.c:1439 [inline]
__se_sys_open fs/open.c:1435 [inline]
__x64_sys_open+0x225/0x270 fs/open.c:1435
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: 0033:0x7fe425f7def9
RSP: 002b:00007fe426d57038 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007fe426136130 RCX: 00007fe425f7def9
RDX: 0000000000000000 RSI: 0000000400141042 RDI: 0000000020000080
RBP: 00007fe425ff0b76 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007fe426136130 R15: 00007ffecd4a1e28
INFO: task syz.2.1056:16377 blocked for more than 144 seconds.
Not tainted 6.11.0-rc7-syzkaller-00039-g77f587896757 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.1056 state:D stack:26128 pid:16377 tgid:16319 ppid:15367 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0x17ae/0x4a10 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6621
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:1676 [inline]
sb_start_write+0x184/0x1c0 include/linux/fs.h:1812
mnt_want_write+0x3f/0x90 fs/namespace.c:515
open_last_lookups fs/namei.c:3636 [inline]
path_openat+0x779/0x3470 fs/namei.c:3883
do_filp_open+0x235/0x490 fs/namei.c:3913
do_sys_openat2+0x13e/0x1d0 fs/open.c:1416
do_sys_open fs/open.c:1431 [inline]
__do_sys_creat fs/open.c:1507 [inline]
__se_sys_creat fs/open.c:1501 [inline]
__x64_sys_creat+0x123/0x170 fs/open.c:1501
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: 0033:0x7fe425f7def9
RSP: 002b:00007fe426d36038 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 00007fe426136208 RCX: 00007fe425f7def9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000080
RBP: 00007fe425ff0b76 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fe426136208 R15: 00007ffecd4a1e28
INFO: task syz.2.1056:16379 blocked for more than 145 seconds.
Not tainted 6.11.0-rc7-syzkaller-00039-g77f587896757 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.1056 state:D stack:24848 pid:16379 tgid:16319 ppid:15367 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0x17ae/0x4a10 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6621
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:1676 [inline]
sb_start_write+0x184/0x1c0 include/linux/fs.h:1812
mnt_want_write+0x3f/0x90 fs/namespace.c:515
open_last_lookups fs/namei.c:3636 [inline]
path_openat+0x779/0x3470 fs/namei.c:3883
do_filp_open+0x235/0x490 fs/namei.c:3913
do_sys_openat2+0x13e/0x1d0 fs/open.c:1416
do_sys_open fs/open.c:1431 [inline]
__do_sys_open fs/open.c:1439 [inline]
__se_sys_open fs/open.c:1435 [inline]
__x64_sys_open+0x225/0x270 fs/open.c:1435
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: 0033:0x7fe425f7def9
RSP: 002b:00007fe426d15038 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007fe4261362e0 RCX: 00007fe425f7def9
RDX: 0000000000000000 RSI: 000000000014927e RDI: 0000000020000180
RBP: 00007fe425ff0b76 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fe4261362e0 R15: 00007ffecd4a1e28
Showing all locks held in the system:
1 lock held by kworker/u8:0/11:
#0: ffff8880b893e998 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:560
4 locks held by kworker/u8:1/12:
1 lock held by khungtaskd/30:
#0: ffffffff8e738320 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
#0: ffffffff8e738320 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
#0: ffffffff8e738320 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6626
3 locks held by kworker/u8:3/52:
#0: ffff88801b6e3148 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline]
#0: ffff88801b6e3148 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312
#1: ffffc90000bc7d00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline]
#1: ffffc90000bc7d00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312
#2: ffffffff8e73d5c0 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:4486
3 locks held by kworker/u8:5/977:
#0:
ffff88802f799148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline]
ffff88802f799148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312
#1:
ffffc9000399fd00
((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline]
((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312
#2: ffffffff8fa79e08 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4194
2 locks held by dhcpcd/4891:
#0: ffff88805ff55678 (nlk_cb_mutex-ROUTE){+.+.}-{3:3}, at: netlink_dump+0xcb/0xd80 net/netlink/af_netlink.c:2271
#1: ffffffff8fa79e08 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#1: ffffffff8fa79e08 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_dumpit+0x99/0x200 net/core/rtnetlink.c:6506
2 locks held by getty/4977:
#0: ffff88802fe330a0 (&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+0x6ac/0x1e00 drivers/tty/n_tty.c:2211
1 lock held by syz.2.1056/16320:
#0: ffff888066fac420 (sb_writers#18){++++}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:515
1 lock held by syz.2.1056/16360:
#0: ffff888066fac420 (sb_writers#18){++++}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:515
1 lock held by syz.2.1056/16375:
#0: ffff888066fac420 (sb_writers#18){++++}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:515
1 lock held by syz.2.1056/16377:
#0: ffff888066fac420 (sb_writers#18){++++}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:515
1 lock held by syz.2.1056/16379:
#0: ffff888066fac420 (sb_writers#18){++++}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:515
2 locks held by syz-executor/18055:
#0: ffffffff8fa79e08 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8fa79e08 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6644
#1: ffffffff8e73d6f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:328 [inline]
#1: ffffffff8e73d6f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x451/0x830 kernel/rcu/tree_exp.h:958
1 lock held by syz-executor/18060:
#0: ffffffff8fa79e08 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8fa79e08 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6644
5 locks held by syz.4.1222/18271:
#0: ffff888022c974b0 (&bdev->bd_fsfreeze_mutex){+.+.}-{3:3}, at: bdev_freeze+0x2a/0x220 block/bdev.c:247
#1: ffff88805f572420 (sb_writers#18){++++}-{0:0}, at: sb_wait_write fs/super.c:1896 [inline]
#1: ffff88805f572420 (sb_writers#18){++++}-{0:0}, at: freeze_super+0x4e9/0xee0 fs/super.c:2085
#2: ffff88805f5720e0 (&type->s_umount_key#66){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#2: ffff88805f5720e0 (&type->s_umount_key#66){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#2: ffff88805f5720e0 (&type->s_umount_key#66){++++}-{3:3}, at: freeze_super+0x4f1/0xee0 fs/super.c:2086
#3: ffff88805f572518 (sb_pagefaults#4){++++}-{0:0}, at: sb_wait_write fs/super.c:1896 [inline]
#3: ffff88805f572518 (sb_pagefaults#4){++++}-{0:0}, at: freeze_super+0x519/0xee0 fs/super.c:2090
#4: ffff88805f572610 (sb_internal#4){++++}-{0:0}, at: sb_wait_write fs/super.c:1896 [inline]
#4: ffff88805f572610 (sb_internal#4){++++}-{0:0}, at: freeze_super+0x7cc/0xee0 fs/super.c:2104
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-rc7-syzkaller-00039-g77f587896757 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
__dump_stack lib/dump_stack.c:93 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119
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:223 [inline]
watchdog+0xff4/0x1040 kernel/hung_task.c:379
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: 4659 Comm: syslogd Not tainted 6.11.0-rc7-syzkaller-00039-g77f587896757 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:__lock_acquire+0xe79/0x2040
Code: d4 49 89 ff 48 c7 c7 e0 51 60 8e 48 89 ee e8 9e df 73 03 4c 89 ff eb 8f 89 d8 25 ff 1f 00 00 c1 eb 03 81 e3 00 60 00 00 09 c3 <4c> 89 f0 48 c1 e8 20 29 c3 89 c1 c1 c1 04 31 d9 44 01 f0 41 29 ce
RSP: 0018:ffffc9000326f5b0 EFLAGS: 00000006
RAX: 000000000000054d RBX: 000000000000054d RCX: ffffffff9a0fd903
RDX: 0000000000000000 RSI: 0000000000000008 RDI: dffffc0000000000
RBP: ffff88807a5946e0 R08: ffffffff93fa68ef R09: 1ffffffff27f4d1d
R10: dffffc0000000000 R11: fffffbfff27f4d1e R12: 0000000000000001
R13: ffff88807a5946d8 R14: ffffffffffffffff R15: ffff88807a594700
FS: 00007f1ace689380(0000) GS:ffff8880b8800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0bb5d9e9a0 CR3: 000000007ab6e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5759
__mutex_lock_common kernel/locking/mutex.c:608 [inline]
__mutex_lock+0x136/0xd70 kernel/locking/mutex.c:752
__unix_dgram_recvmsg+0x246/0x12f0 net/unix/af_unix.c:2439
sock_recvmsg_nosec net/socket.c:1046 [inline]
sock_recvmsg+0x22f/0x280 net/socket.c:1068
sock_read_iter+0x2ca/0x3e0 net/socket.c:1138
new_sync_read fs/read_write.c:395 [inline]
vfs_read+0x9bd/0xbc0 fs/read_write.c:476
ksys_read+0x1a0/0x2c0 fs/read_write.c:619
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: 0033:0x7f1ace7ddb6a
Code: 00 3d 00 00 41 00 75 0d 50 48 8d 3d 2d 08 0a 00 e8 ea 7d 01 00 31 c0 e9 07 ff ff ff 64 8b 04 25 18 00 00 00 85 c0 75 1b 0f 05 <48> 3d 00 f0 ff ff 76 6c 48 8b 15 8f a2 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffccf923da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f1ace7ddb6a
RDX: 00000000000000ff RSI: 000056382a437950 RDI: 0000000000000000
RBP: 000056382a437910 R08: 0000000000000001 R09: 0000000000000000
R10: 00007f1ace97c3a3 R11: 0000000000000246 R12: 000056382a43799c
R13: 000056382a437950 R14: 0000000000000000 R15: 00007f1ace9c1a80