INFO: task syz.5.334:6009 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.5.334 state:D
stack:26208 pid: 6009 ppid: 4581 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5049 [inline]
__schedule+0x11bb/0x4390 kernel/sched/core.c:6395
schedule+0x11b/0x1e0 kernel/sched/core.c:6478
rwsem_down_write_slowpath+0xc46/0x11f0 kernel/locking/rwsem.c:1165
inode_lock include/linux/fs.h:787 [inline]
process_measurement+0x33d/0x1a10 security/integrity/ima/ima_main.c:242
ima_file_check+0xc1/0x100 security/integrity/ima/ima_main.c:533
do_open fs/namei.c:3618 [inline]
path_openat+0x2735/0x2f30 fs/namei.c:3750
do_filp_open+0x1b3/0x3e0 fs/namei.c:3777
do_sys_openat2+0x142/0x4a0 fs/open.c:1253
do_sys_open fs/open.c:1269 [inline]
__do_sys_openat fs/open.c:1285 [inline]
__se_sys_openat fs/open.c:1280 [inline]
__x64_sys_openat+0x135/0x160 fs/open.c:1280
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f623f2da749
RSP: 002b:00007f623d4ff038 EFLAGS: 00000246
ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f623f531180 RCX: 00007f623f2da749
RDX: 0000000000000042 RSI: 0000200000000100 RDI: ffffffffffffff9c
RBP: 00007f623f35ef91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f623f531218 R14: 00007f623f531180 R15: 00007ffd37d9ff98
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8c11c760 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
1 lock held by udevd/3561:
#0: ffff8880202c0518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x157/0xa60 block/bdev.c:820
1 lock held by dhcpcd/3854:
#0: ffffffff8d238988 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8d238988 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x7a5/0xe90 net/core/rtnetlink.c:5681
2 locks held by getty/3951:
#0: ffff88814d12f098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc900026562e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x5ba/0x1a30 drivers/tty/n_tty.c:2158
1 lock held by udevd/4196:
4 locks held by kworker/1:6/4261:
#0: ffff888016871138 ((wq_completion)events_long){+.+.}-{0:0}, at: process_one_work+0x760/0x1000 kernel/workqueue.c:-1
#1: ffffc9000339fd00 ((work_completion)(&(&sbi->old_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7a3/0x1000 kernel/workqueue.c:2285
#2: ffff8880200aa0e0 (&type->s_umount_key#97){++++}-{3:3}, at: flush_old_commits+0xc8/0x2f0 fs/reiserfs/super.c:97
#3: ffff8880609a9090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x75/0xd0 fs/reiserfs/lock.c:27
3 locks held by kworker/1:11/4378:
#0: ffff888016870938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x760/0x1000 kernel/workqueue.c:-1
#1: ffffc900011efd00 ((work_completion)(&map->work)){+.+.}-{0:0}, at: process_one_work+0x7a3/0x1000 kernel/workqueue.c:2285
#2: ffffffff8c1211e8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:322 [inline]
#2: ffffffff8c1211e8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x320/0x6b0 kernel/rcu/tree_exp.h:845
2 locks held by kworker/1:16/4383:
1 lock held by udevd/4404:
#0: ffff8880202c0518
(
&disk->open_mutex
){+.+.}-{3:3}
, at: blkdev_get_by_dev+0x157/0xa60 block/bdev.c:820
3 locks held by kworker/u4:10/4771:
#0:
ffff888016879138
(
(wq_completion)events_unbound
){+.+.}-{0:0}
, at: process_one_work+0x760/0x1000 kernel/workqueue.c:-1
#1:
ffffc9000152fd00
(
(linkwatch_work).work
){+.+.}-{0:0}
, at: process_one_work+0x7a3/0x1000 kernel/workqueue.c:2285
#2:
ffffffff8d238988
(
rtnl_mutex
){+.+.}-{3:3}
, at: linkwatch_event+0xa/0x50 net/core/link_watch.c:251
2 locks held by kworker/0:11/4887:
#0:
ffff888016870938
(
(wq_completion)events
){+.+.}-{0:0}
, at: process_one_work+0x760/0x1000 kernel/workqueue.c:-1
#1:
ffffc9000457fd00
(
(work_completion)(&pwq->unbound_release_work)
){+.+.}-{0:0}
, at: process_one_work+0x7a3/0x1000 kernel/workqueue.c:2285
6 locks held by syz.5.334/5993:
1 lock held by syz.5.334/6009:
#0:
ffff888055439020
(
&sb->s_type->i_mutex_key
#33
){+.+.}-{3:3}
, at: inode_lock include/linux/fs.h:787 [inline]
, at: process_measurement+0x33d/0x1a10 security/integrity/ima/ima_main.c:242
2 locks held by syz.0.378/6207:
#0:
ffff8880200aa0e0
(
&type->s_umount_key
#97
){++++}-{3:3}
, at: iterate_supers+0xa4/0x1d0 fs/super.c:716
#1:
ffff8880609a9090
(
&sbi->lock
){+.+.}-{3:3}
, at: reiserfs_write_lock+0x75/0xd0 fs/reiserfs/lock.c:27
1 lock held by syz-executor/6419:
#0:
ffff888147bd5468
(
&lo->lo_mutex
){+.+.}-{3:3}
, at: __loop_clr_fd+0xaa/0xb90 drivers/block/loop.c:1366
1 lock held by syz.9.670/8095:
#0:
ffffffff8c7e2b28
(
tty_mutex
){+.+.}-{3:3}
, at: tty_release_struct+0xaa/0xd0 drivers/tty/tty_io.c:1718
1 lock held by syz.6.692/8144:
#0:
ffffffff8d238988 (rtnl_mutex){+.+.}-{3:3}
, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
, at: rtnetlink_rcv_msg+0x7a5/0xe90 net/core/rtnetlink.c:5681
4 locks held by syz.1.696/8174:
#0:
ffffffff8d295710
(
cb_lock
){++++}-{3:3}
, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:802
#1:
ffff88807ac25698
(
nlk_cb_mutex-GENERIC
){+.+.}-{3:3}
, at: __netlink_dump_start+0x11f/0x700 net/netlink/af_netlink.c:2352
#2:
ffffffff8d295568
(
genl_mutex
){+.+.}-{3:3}
, at: genl_lock net/netlink/genetlink.c:33 [inline]
, at: genl_lock_dumpit+0x47/0x90 net/netlink/genetlink.c:614
#3:
ffffffff8d238988
(
rtnl_mutex
){+.+.}-{3:3}
, at: ieee802154_nl_fill_phy+0xf1/0x660 net/ieee802154/nl-phy.c:45
1 lock held by dhcpcd/8188:
#0:
ffff888074134410
(
&sb->s_type->i_mutex_key
#11
){+.+.}-{3:3}
, at: inode_lock include/linux/fs.h:787 [inline]
, at: __sock_release net/socket.c:650 [inline]
, at: sock_close+0x90/0x240 net/socket.c:1346
1 lock held by dhcpcd/8189:
#0:
ffff888074130810
(
&sb->s_type->i_mutex_key
#11
){+.+.}-{3:3}
, at: inode_lock include/linux/fs.h:787 [inline]
, at: __sock_release net/socket.c:650 [inline]
, at: sock_close+0x90/0x240 net/socket.c:1346
1 lock held by dhcpcd/8190:
#0:
ffff8880742d7a10
(
&sb->s_type->i_mutex_key
#11
){+.+.}-{3:3}
, at: inode_lock include/linux/fs.h:787 [inline]
, at: __sock_release net/socket.c:650 [inline]
, at: sock_close+0x90/0x240 net/socket.c:1346
1 lock held by dhcpcd/8191:
#0:
ffff8880612cb210
(
&sb->s_type->i_mutex_key
#11
){+.+.}-{3:3}
, at: inode_lock include/linux/fs.h:787 [inline]
, at: __sock_release net/socket.c:650 [inline]
, at: sock_close+0x90/0x240 net/socket.c:1346
2 locks held by dhcpcd/8192:
#0: ffff8880612cee10 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}
, at: inode_lock include/linux/fs.h:787 [inline]
, at: __sock_release net/socket.c:650 [inline]
, at: sock_close+0x90/0x240 net/socket.c:1346
#1:
ffffffff8c1211e8
(
rcu_state.exp_mutex
){+.+.}-{3:3}
, at: exp_funnel_lock kernel/rcu/tree_exp.h:322 [inline]
, at: synchronize_rcu_expedited+0x320/0x6b0 kernel/rcu/tree_exp.h:845
2 locks held by dhcpcd/8193:
#0:
ffff8880612c8e10
(
&sb->s_type->i_mutex_key
#11
){+.+.}-{3:3}
, at: inode_lock include/linux/fs.h:787 [inline]
, at: __sock_release net/socket.c:650 [inline]
, at: sock_close+0x90/0x240 net/socket.c:1346
#1:
ffffffff8c1211e8
(
rcu_state.exp_mutex
){+.+.}-{3:3}
, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline]
, at: synchronize_rcu_expedited+0x347/0x6b0 kernel/rcu/tree_exp.h:845
2 locks held by syz.5.694/8197:
#0:
ffffffff8d295710
(
cb_lock
){++++}-{3:3}
, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:802
#1:
ffffffff8d295568
(
genl_mutex
){+.+.}-{3:3}
, at: genl_lock net/netlink/genetlink.c:33 [inline]
, at: genl_rcv_msg+0x137/0xf40 net/netlink/genetlink.c:790
2 locks held by syz.5.694/8199:
#0:
ffffffff8d295710
(
cb_lock
){++++}-{3:3}
, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:802
#1:
ffffffff8d295568
(
genl_mutex
){+.+.}-{3:3}
, at: genl_lock net/netlink/genetlink.c:33 [inline]
, at: genl_rcv_msg+0x137/0xf40 net/netlink/genetlink.c:790
1 lock held by syz-executor/8201:
#0:
ffffffff8d238988
(
rtnl_mutex
){+.+.}-{3:3}
, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
, at: rtnetlink_rcv_msg+0x7a5/0xe90 net/core/rtnetlink.c:5681
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Call Trace:
dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106
nmi_cpu_backtrace+0x397/0x3d0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x163/0x280 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
watchdog+0xe0f/0xe50 kernel/hung_task.c:369
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 20 Comm: ksoftirqd/1 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:addrconf_rs_timer+0xa0/0x600 net/ipv6/addrconf.c:-1
Code: f8 4c 8d b3 08 f9 ff ff 4d 89 f7 49 c1 ef 03 43 80 3c 2f 00 74 08 4c 89 f7 e8 9c 65 2d f9 4c 89 74 24 10 48 8b 83 08 f9 ff ff <48> 89 44 24 18 ba 10 00 00 00 4c 89 e7 31 f6 e8 2c 67 2d f9 48 8d
RSP: 0018:ffffc90000da7960 EFLAGS: 00000246
RAX: ffff88805bd40000 RBX: ffff88806097f6f8 RCX: ffff888016a90000
RDX: 0000000000000100 RSI: ffffffff8a59e560 RDI: ffff88806097f6f8
RBP: ffffc90000da7a30 R08: dffffc0000000000 R09: fffffbfff1ad33a6
R10: fffffbfff1ad33a6 R11: 1ffffffff1ad33a5 R12: ffffc90000da79c0
R13: dffffc0000000000 R14: ffff88806097f000 R15: 1ffff1100c12fe00
FS: 0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000000d000 CR3: 000000007dc55000 CR4: 00000000003506e0
DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000083
DR3: ffffffffefffff15 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
call_timer_fn+0x16c/0x530 kernel/time/timer.c:1451
expire_timers kernel/time/timer.c:1496 [inline]
__run_timers+0x525/0x7c0 kernel/time/timer.c:1767
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1780
handle_softirqs+0x328/0x820 kernel/softirq.c:576
run_ksoftirqd+0x98/0xf0 kernel/softirq.c:943
smpboot_thread_fn+0x4f6/0x970 kernel/smpboot.c:164
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287