INFO: task syz-executor.1:6346 blocked for more than 143 seconds.
Not tainted 6.9.0-rc5-syzkaller-00007-g4d2008430ce8 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:28784 pid:6346 tgid:6329 ppid:5085 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6746
__schedule_loop kernel/sched/core.c:6823 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6838
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6895
rwsem_down_read_slowpath+0x61e/0xb20 kernel/locking/rwsem.c:1086
__down_read_common kernel/locking/rwsem.c:1250 [inline]
__down_read kernel/locking/rwsem.c:1263 [inline]
down_read+0x124/0x330 kernel/locking/rwsem.c:1528
inode_lock_shared include/linux/fs.h:805 [inline]
lookup_slow fs/namei.c:1708 [inline]
walk_component+0x342/0x5b0 fs/namei.c:2004
lookup_last fs/namei.c:2461 [inline]
path_lookupat+0x17f/0x770 fs/namei.c:2485
filename_lookup+0x1e5/0x5b0 fs/namei.c:2514
user_path_at_empty+0x42/0x60 fs/namei.c:2921
user_path_at include/linux/namei.h:57 [inline]
do_mount fs/namespace.c:3689 [inline]
__do_sys_mount fs/namespace.c:3898 [inline]
__se_sys_mount fs/namespace.c:3875 [inline]
__x64_sys_mount+0x1ff/0x320 fs/namespace.c:3875
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc8e807dea9
RSP: 002b:00007fc8e8e850c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fc8e81ac050 RCX: 00007fc8e807dea9
RDX: 0000000020002100 RSI: 0000000020000000 RDI: 0000000000000000
RBP: 00007fc8e80ca4a4 R08: 0000000020000080 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fc8e81ac050 R15: 00007ffd848ba6e8
INFO: task syz-executor.1:6349 blocked for more than 143 seconds.
Not tainted 6.9.0-rc5-syzkaller-00007-g4d2008430ce8 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:26928 pid:6349 tgid:6329 ppid:5085 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6746
__schedule_loop kernel/sched/core.c:6823 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6838
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6895
rwsem_down_read_slowpath+0x61e/0xb20 kernel/locking/rwsem.c:1086
__down_read_common kernel/locking/rwsem.c:1250 [inline]
__down_read kernel/locking/rwsem.c:1263 [inline]
down_read+0x124/0x330 kernel/locking/rwsem.c:1528
inode_lock_shared include/linux/fs.h:805 [inline]
lookup_slow fs/namei.c:1708 [inline]
walk_component+0x342/0x5b0 fs/namei.c:2004
link_path_walk.part.0.constprop.0+0x77f/0xcd0 fs/namei.c:2331
link_path_walk fs/namei.c:2256 [inline]
path_parentat+0xaa/0x1b0 fs/namei.c:2532
__filename_parentat+0x1f0/0x630 fs/namei.c:2556
filename_parentat fs/namei.c:2574 [inline]
do_rmdir+0xd8/0x410 fs/namei.c:4233
__do_sys_rmdir fs/namei.c:4284 [inline]
__se_sys_rmdir fs/namei.c:4282 [inline]
__x64_sys_rmdir+0xc7/0x110 fs/namei.c:4282
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc8e807dea9
RSP: 002b:00007fc8e8e640c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000054
RAX: ffffffffffffffda RBX: 00007fc8e81ac120 RCX: 00007fc8e807dea9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000200
RBP: 00007fc8e80ca4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fc8e81ac120 R15: 00007ffd848ba6e8
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
#0: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
#0: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614
2 locks held by kworker/u8:2/34:
3 locks held by kworker/1:1/44:
#0: ffff888015080948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x1296/0x1ac0 kernel/workqueue.c:3229
#1: ffffc90000b47d80 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x906/0x1ac0 kernel/workqueue.c:3230
#2: ffffffff8f2ffec8 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0x51/0xc0 net/core/link_watch.c:276
3 locks held by kworker/u8:4/60:
#0: ffff88802aad1148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x1296/0x1ac0 kernel/workqueue.c:3229
#1: ffffc900015b7d80 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x906/0x1ac0 kernel/workqueue.c:3230
#2: ffffffff8f2ffec8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xcf/0x1500 net/ipv6/addrconf.c:4192
2 locks held by getty/4827:
#0: ffff88802efb00a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900031232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2201
4 locks held by kworker/u8:9/5259:
#0: ffff888015ecb148 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x1296/0x1ac0 kernel/workqueue.c:3229
#1: ffffc900047ffd80 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x906/0x1ac0 kernel/workqueue.c:3230
#2: ffffffff8f2eb0d0 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xbb/0xbf0 net/core/net_namespace.c:591
#3: ffffffff8f2ffec8 (rtnl_mutex){+.+.}-{3:3}, at: wiphy_unregister+0x142/0xbc0 net/wireless/core.c:1096
2 locks held by syz-executor.1/6334:
1 lock held by syz-executor.1/6346:
#0: ffff88805fffc188 (&type->i_mutex_dir_key#17){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:805 [inline]
#0: ffff88805fffc188 (&type->i_mutex_dir_key#17){.+.+}-{3:3}, at: lookup_slow fs/namei.c:1708 [inline]
#0: ffff88805fffc188 (&type->i_mutex_dir_key#17){.+.+}-{3:3}, at: walk_component+0x342/0x5b0 fs/namei.c:2004
1 lock held by syz-executor.1/6349:
#0: ffff88805fffc188 (&type->i_mutex_dir_key#17){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:805 [inline]
#0: ffff88805fffc188 (&type->i_mutex_dir_key#17){.+.+}-{3:3}, at: lookup_slow fs/namei.c:1708 [inline]
#0: ffff88805fffc188 (&type->i_mutex_dir_key#17){.+.+}-{3:3}, at: walk_component+0x342/0x5b0 fs/namei.c:2004
1 lock held by syz-executor.2/6531:
1 lock held by syz-executor.1/7298:
#0: ffffffff8f2ffec8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8f2ffec8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe60 net/core/rtnetlink.c:6592
1 lock held by syz-executor.3/7315:
#0: ffffffff8f2ffec8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8f2ffec8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe60 net/core/rtnetlink.c:6592
1 lock held by syz-executor.0/7411:
#0: ffffffff8f2ffec8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8f2ffec8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe60 net/core/rtnetlink.c:6592
2 locks held by syz-executor.4/7437:
#0: ffffffff8f2ffec8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8f2ffec8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe60 net/core/rtnetlink.c:6592
#1: ffffffff8d7bc538 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:291 [inline]
#1: ffffffff8d7bc538 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x682/0x7a0 kernel/rcu/tree_exp.h:939
2 locks held by syz-executor.2/7464:
#0: ffff88802bab8420 (sb_writers#5){.+.+}-{0:0}, at: ioctl_preallocate+0x1a8/0x220 fs/ioctl.c:291
#1: ffff8880328ec000 (&sb->s_type->i_mutex_key#7){++++}-{3:3}, at: inode_lock include/linux/fs.h:795 [inline]
#1: ffff8880328ec000 (&sb->s_type->i_mutex_key#7){++++}-{3:3}, at: ext4_fallocate+0x342/0x3f00 fs/ext4/extents.c:4765
1 lock held by syz-executor.2/7465:
#0: ffff8880b943ea58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:559
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.9.0-rc5-syzkaller-00007-g4d2008430ce8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
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:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xf86/0x1240 kernel/hung_task.c:380
kthread+0x2c1/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
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 PID: 34 Comm: kworker/u8:2 Not tainted 6.9.0-rc5-syzkaller-00007-g4d2008430ce8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Workqueue: events_unbound cfg80211_wiphy_work
RIP: 0010:check_kcov_mode kernel/kcov.c:175 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x2d/0x60 kernel/kcov.c:207
Code: fa 65 48 8b 15 24 15 76 7e 65 8b 05 25 15 76 7e a9 00 01 ff 00 48 8b 34 24 74 0f f6 c4 01 74 35 8b 82 14 16 00 00 85 c0 74 2b <8b> 82 f0 15 00 00 83 f8 02 75 20 48 8b 8a f8 15 00 00 8b 92 f4 15
RSP: 0018:ffffc90000aa7bf0 EFLAGS: 00000246
RAX: 0000000080000000 RBX: ffff888052bc6640 RCX: ffffffff88b22207
RDX: ffff8880176dda00 RSI: ffffffff88b2cd2d RDI: 0000000000000001
RBP: 0000000000000002 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000003 R12: 0000000000000000
R13: 0000000000000001 R14: 0000000000000001 R15: 0000000000000080
FS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31e2e000 CR3: 000000000d57a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
skb_release_all net/core/skbuff.c:1200 [inline]
__kfree_skb net/core/skbuff.c:1216 [inline]
kfree_skb_reason+0xed/0x210 net/core/skbuff.c:1252
kfree_skb include/linux/skbuff.h:1262 [inline]
ieee80211_iface_work+0x435/0xf00 net/mac80211/iface.c:1661
cfg80211_wiphy_work+0x255/0x330 net/wireless/core.c:437
process_one_work+0x9a9/0x1ac0 kernel/workqueue.c:3254
process_scheduled_works kernel/workqueue.c:3335 [inline]
worker_thread+0x6c8/0xf70 kernel/workqueue.c:3416
kthread+0x2c1/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244