INFO: task syz-executor.2:7227 blocked for more than 143 seconds.
Not tainted 6.9.0-rc5-syzkaller-00042-ge88c4cfcb7b8 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:25040 pid:7227 tgid:7225 ppid:6918 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0x1796/0x4a00 kernel/sched/core.c:6746
__schedule_loop kernel/sched/core.c:6823 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6838
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6895
rwsem_down_write_slowpath+0xeeb/0x13b0 kernel/locking/rwsem.c:1178
__down_write_common+0x1af/0x200 kernel/locking/rwsem.c:1306
inode_lock_nested include/linux/fs.h:830 [inline]
do_unlinkat+0x26a/0x830 fs/namei.c:4386
__do_sys_unlink fs/namei.c:4447 [inline]
__se_sys_unlink fs/namei.c:4445 [inline]
__x64_sys_unlink+0x49/0x60 fs/namei.c:4445
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fee6ba7dea9
RSP: 002b:00007fee6b5ff0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 00007fee6bbac050 RCX: 00007fee6ba7dea9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000240
RBP: 00007fee6baca4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fee6bbac050 R15: 00007ffca5785b38
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8e334d20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
#0: ffffffff8e334d20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
#0: ffffffff8e334d20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
6 locks held by kworker/u8:8/2851:
#0: ffff888015ecb148 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3229 [inline]
#0: ffff888015ecb148 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x8e0/0x17c0 kernel/workqueue.c:3335
#1: ffffc9000a38fd00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3230 [inline]
#1: ffffc9000a38fd00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x91b/0x17c0 kernel/workqueue.c:3335
#2: ffffffff8f588290 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x16a/0xcc0 net/core/net_namespace.c:591
#3: ffffffff8f594988 (rtnl_mutex){+.+.}-{3:3}, at: wiphy_unregister+0x236/0xaa0 net/wireless/core.c:1096
#4: ffff888064490768 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: wiphy_lock include/net/cfg80211.h:5953 [inline]
#4: ffff888064490768 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: wiphy_unregister+0x240/0xaa0 net/wireless/core.c:1097
#5: ffffffff8e33a0b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:291 [inline]
#5: ffffffff8e33a0b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x39a/0x820 kernel/rcu/tree_exp.h:939
1 lock held by udevd/4525:
1 lock held by dhcpcd/4739:
#0: ffffffff8f594988 (rtnl_mutex){+.+.}-{3:3}, at: devinet_ioctl+0x2ce/0x1bc0 net/ipv4/devinet.c:1096
2 locks held by getty/4832:
#0: ffff88802b0030a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f0e2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2201
2 locks held by syz-executor.2/7226:
2 locks held by syz-executor.2/7227:
#0: ffff88802e5de420 (sb_writers#36){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:409
#1: ffff88805a87cc18 (&type->i_mutex_dir_key#29/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:830 [inline]
#1: ffff88805a87cc18 (&type->i_mutex_dir_key#29/1){+.+.}-{3:3}, at: do_unlinkat+0x26a/0x830 fs/namei.c:4386
1 lock held by syz-executor.3/8668:
1 lock held by syz-executor.4/9007:
#0: ffffffff8f594988 (rtnl_mutex){+.+.}-{3:3}, at: __tun_chr_ioctl+0x48f/0x2400 drivers/net/tun.c:3110
2 locks held by syz-executor.2/9027:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.9.0-rc5-syzkaller-00042-ge88c4cfcb7b8 #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+0x241/0x360 lib/dump_stack.c:114
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:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xfde/0x1020 kernel/hung_task.c:380
kthread+0x2f0/0x390 kernel/kthread.c:388
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 PID: 9035 Comm: syz-executor.0 Not tainted 6.9.0-rc5-syzkaller-00042-ge88c4cfcb7b8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:PagePoisoned include/linux/page-flags.h:298 [inline]
RIP: 0010:PageSlab include/linux/page-flags.h:507 [inline]
RIP: 0010:page_table_check_clear+0xd6/0x730 mm/page_table_check.c:74
Code: 4c 89 fb 48 89 d8 48 c1 e8 03 80 3c 28 00 74 08 48 89 df e8 cc 16 f4 ff 48 8b 1b 48 c7 c7 ff ff ff ff 48 89 de e8 3a 0a 93 ff <48> 83 fb ff 0f 84 58 03 00 00 48 8b 44 24 08 80 3c 28 00 74 08 4c
RSP: 0018:ffffc90004dcf2d8 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 00fff80000000004 RCX: ffff8880113f0000
RDX: 0000000000000000 RSI: 00fff80000000004 RDI: ffffffffffffffff
RBP: dffffc0000000000 R08: ffffffff8202fb16 R09: 1ffffffff25e00a0
R10: dffffc0000000000 R11: fffffbfff25e00a1 R12: ffffea0001d51d08
R13: ffff888018da6440 R14: 0000000000000001 R15: ffffea0001d51d00
FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0b4e3fef38 CR3: 000000000e134000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
get_and_clear_full_ptes include/linux/pgtable.h:634 [inline]
zap_present_folio_ptes mm/memory.c:1479 [inline]
zap_present_ptes mm/memory.c:1563 [inline]
zap_pte_range mm/memory.c:1605 [inline]
zap_pmd_range mm/memory.c:1722 [inline]
zap_pud_range mm/memory.c:1751 [inline]
zap_p4d_range mm/memory.c:1772 [inline]
unmap_page_range+0x31b0/0x4820 mm/memory.c:1793
unmap_vmas+0x3cc/0x5f0 mm/memory.c:1883
exit_mmap+0x2cb/0xd60 mm/mmap.c:3267
__mmput+0x115/0x3c0 kernel/fork.c:1346
exit_mm+0x220/0x310 kernel/exit.c:569
do_exit+0x99e/0x27e0 kernel/exit.c:865
do_group_exit+0x207/0x2c0 kernel/exit.c:1027
get_signal+0x16a1/0x1740 kernel/signal.c:2911
arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218
do_syscall_64+0x102/0x240 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc22787dea9
Code: Unable to access opcode bytes at 0x7fc22787de7f.
RSP: 002b:00007fc2273ff178 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fc2279ac058 RCX: 00007fc22787dea9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fc2279ac058
RBP: 00007fc2279ac050 R08: 00007fc2273ff6c0 R09: 00007fc2273ff6c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc2279ac05c
R13: 000000000000006e R14: 00007ffee79dbd00 R15: 00007ffee79dbde8