INFO: task syz.1.6810:31706 blocked for more than 143 seconds.
Not tainted 6.16.0-rc7-syzkaller-00114-g327579671a9b #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.6810 state:D stack:26232 pid:31706 tgid:31705 ppid:30344 task_flags:0x400140 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5397 [inline]
__schedule+0x116a/0x5dd0 kernel/sched/core.c:6786
__schedule_loop kernel/sched/core.c:6864 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:6879
super_lock+0x2c0/0x3f0 fs/super.c:115
__iterate_supers+0x1e0/0x330 fs/super.c:923
ksys_sync+0x89/0x150 fs/sync.c:102
__do_sys_sync+0xe/0x20 fs/sync.c:113
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3c72b8e9a9
RSP: 002b:00007f3c709f6038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007f3c72db5fa0 RCX: 00007f3c72b8e9a9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f3c72db5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f3c72db5fa0 R15: 00007ffd2884d428
INFO: task syz.2.6811:31710 blocked for more than 144 seconds.
Not tainted 6.16.0-rc7-syzkaller-00114-g327579671a9b #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.6811 state:D stack:27512 pid:31710 tgid:31709 ppid:29660 task_flags:0x400040 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5397 [inline]
__schedule+0x116a/0x5dd0 kernel/sched/core.c:6786
__schedule_loop kernel/sched/core.c:6864 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:6879
super_lock+0x2c0/0x3f0 fs/super.c:115
__iterate_supers+0x1e0/0x330 fs/super.c:923
ksys_sync+0x89/0x150 fs/sync.c:102
__do_sys_sync+0xe/0x20 fs/sync.c:113
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd593b8e9a9
RSP: 002b:00007fd594991038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007fd593db5fa0 RCX: 00007fd593b8e9a9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fd593db5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fd593db5fa0 R15: 00007ffea12bc938
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff8e5c4e00 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8e5c4e00 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8e5c4e00 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x36/0x1c0 kernel/locking/lockdep.c:6770
3 locks held by kworker/u8:8/4523:
#0: ffff88801b881148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x12a2/0x1b70 kernel/workqueue.c:3213
#1: ffffc9000e597d10 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x929/0x1b70 kernel/workqueue.c:3214
#2: ffffffff9035e928 (rtnl_mutex){+.+.}-{4:4}, at: linkwatch_event+0x51/0xc0 net/core/link_watch.c:303
2 locks held by getty/5593:
#0: ffff8880372910a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc9000333b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x41b/0x14f0 drivers/tty/n_tty.c:2222
3 locks held by kworker/u8:2/23277:
#0: ffff8880320fd148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x12a2/0x1b70 kernel/workqueue.c:3213
#1: ffffc90003f3fd10 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x929/0x1b70 kernel/workqueue.c:3214
#2: ffffffff9035e928 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
#2: ffffffff9035e928 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_verify_work+0x12/0x30 net/ipv6/addrconf.c:4733
1 lock held by syz.0.6710/31473:
2 locks held by syz.6.7638/1893:
#0: ffffffff9035e928 (rtnl_mutex){+.+.}-{4:4}, at: tun_detach drivers/net/tun.c:633 [inline]
#0: ffffffff9035e928 (rtnl_mutex){+.+.}-{4:4}, at: tun_chr_close+0x38/0x230 drivers/net/tun.c:3396
#1: ffffffff8e5d03f8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock+0x284/0x3c0 kernel/rcu/tree_exp.h:304
1 lock held by syz.7.7640/1900:
#0: ffffffff9035e928 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline]
#0: ffffffff9035e928 (rtnl_mutex){+.+.}-{4:4}, at: rtnetlink_rcv_msg+0x371/0xe90 net/core/rtnetlink.c:6950
1 lock held by syz.7.7640/1913:
#0: ffffffff9035e928 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline]
#0: ffffffff9035e928 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
#0: ffffffff9035e928 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x277/0xa80 net/core/rtnetlink.c:3545
1 lock held by syz.4.7644/1916:
#0: ffffffff9035e928 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline]
#0: ffffffff9035e928 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:341 [inline]
#0: ffffffff9035e928 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x600/0x2000 net/core/rtnetlink.c:4054
1 lock held by syz.4.7644/1919:
#0: ffffffff9035e928 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline]
#0: ffffffff9035e928 (rtnl_mutex){+.+.}-{4:4}, at: rtnetlink_rcv_msg+0x371/0xe90 net/core/rtnetlink.c:6950
1 lock held by syz.4.7644/1921:
#0: ffffffff9035e928 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline]
#0: ffffffff9035e928 (rtnl_mutex){+.+.}-{4:4}, at: rtnetlink_rcv_msg+0x371/0xe90 net/core/rtnetlink.c:6950
2 locks held by syz.9.7645/1923:
#0: ffffffff90403150 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218
#1: ffffffff9035e928 (rtnl_mutex){+.+.}-{4:4}, at: ethnl_default_set_doit+0x2f5/0xb10 net/ethtool/netlink.c:892
2 locks held by syz.9.7645/1927:
#0: ffffffff90403150 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218
#1: ffffffff9035e928 (rtnl_mutex){+.+.}-{4:4}, at: ethnl_default_set_doit+0x2f5/0xb10 net/ethtool/netlink.c:892
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc7-syzkaller-00114-g327579671a9b #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:307 [inline]
watchdog+0xf70/0x12c0 kernel/hung_task.c:470
kthread+0x3c2/0x780 kernel/kthread.c:464
ret_from_fork+0x5d4/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31473 Comm: syz.0.6710 Not tainted 6.16.0-rc7-syzkaller-00114-g327579671a9b #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:set_normalized_timespec64+0x4a/0xc0 kernel/time/time.c:509
Code: 00 ca 9a 3b 48 83 c5 01 48 89 de bf ff c9 9a 3b e8 9b 49 14 00 48 81 fb ff c9 9a 3b 7f da e8 1d 4e 14 00 eb 10 e8 16 4e 14 00 <48> 81 c3 00 ca 9a 3b 48 83 ed 01 31 ff 48 89 de e8 71 49 14 00 48
RSP: 0018:ffffc9000c2c7b68 EFLAGS: 00000246
RAX: 0000000000080000 RBX: e5d5c6d28507a437 RCX: ffffc9000ed9b000
RDX: 0000000000080000 RSI: ffffffff81a79a7a RDI: 0000000000000007
RBP: e4babd64288eb836 R08: 0000000000000007 R09: 0000000000000000
R10: e5d5c6d28507a437 R11: 0000000000000001 R12: ffffc9000c2c7bb0
R13: 1ffff92001858f72 R14: ffffc9000c2c7bb8 R15: dffffc0000000000
FS: 00007f0fbf2796c0(0000) GS:ffff888124720000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055558226f5c8 CR3: 0000000025a30000 CR4: 00000000003526f0
Call Trace:
inode_set_ctime_to_ts+0xca/0x1f0 fs/inode.c:2666
inode_set_ctime include/linux/fs.h:1775 [inline]
v9fs_stat2inode_dotl+0x6e1/0xd30 fs/9p/vfs_inode_dotl.c:656
v9fs_qid_iget_dotl fs/9p/vfs_inode_dotl.c:128 [inline]
v9fs_inode_from_fid_dotl+0x249/0x2f0 fs/9p/vfs_inode_dotl.c:154
v9fs_get_new_inode_from_fid fs/9p/v9fs.h:251 [inline]
v9fs_mount+0x4fd/0xa30 fs/9p/vfs_super.c:142
legacy_get_tree+0x10c/0x220 fs/fs_context.c:666
vfs_get_tree+0x8b/0x340 fs/super.c:1804
do_new_mount fs/namespace.c:3902 [inline]
path_mount+0x1414/0x2020 fs/namespace.c:4226
do_mount fs/namespace.c:4239 [inline]
__do_sys_mount fs/namespace.c:4450 [inline]
__se_sys_mount fs/namespace.c:4427 [inline]
__x64_sys_mount+0x28d/0x310 fs/namespace.c:4427
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0fbe38e9a9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f0fbf279038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f0fbe5b5fa0 RCX: 00007f0fbe38e9a9
RDX: 0000200000000b80 RSI: 0000200000000040 RDI: 0000000000000000
RBP: 00007f0fbe410d69 R08: 0000200000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f0fbe5b5fa0 R15: 00007ffc862b64e8