INFO: task syz.0.124:6770 blocked for more than 143 seconds.
Not tainted 6.16.0-rc4-syzkaller-00013-g66701750d556 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.124 state:D stack:27752 pid:6770 tgid:6730 ppid:5817 task_flags:0x400040 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5396 [inline]
__schedule+0x16a2/0x4cb0 kernel/sched/core.c:6785
__schedule_loop kernel/sched/core.c:6863 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6878
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6935
rwsem_down_write_slowpath+0xbec/0x1030 kernel/locking/rwsem.c:1176
__down_write_common kernel/locking/rwsem.c:1304 [inline]
__down_write kernel/locking/rwsem.c:1313 [inline]
down_write+0x1ab/0x1f0 kernel/locking/rwsem.c:1578
inode_lock include/linux/fs.h:869 [inline]
process_measurement+0x3d8/0x1a40 security/integrity/ima/ima_main.c:260
ima_file_check+0xd7/0x120 security/integrity/ima/ima_main.c:613
security_file_post_open+0xbb/0x290 security/security.c:3130
do_open fs/namei.c:3898 [inline]
path_openat+0x2f26/0x3830 fs/namei.c:4055
do_filp_open+0x1fa/0x410 fs/namei.c:4082
do_sys_openat2+0x121/0x1c0 fs/open.c:1437
do_sys_open fs/open.c:1452 [inline]
__do_sys_openat fs/open.c:1468 [inline]
__se_sys_openat fs/open.c:1463 [inline]
__x64_sys_openat+0x138/0x170 fs/open.c:1463
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4b40f8e929
RSP: 002b:00007f4b3edf6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f4b411b6080 RCX: 00007f4b40f8e929
RDX: 0000000000000800 RSI: 00002000000001c0 RDI: ffffffffffffff9c
RBP: 00007f4b41010b39 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000000000c5 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f4b411b6080 R15: 00007ffd32d05f58
Showing all locks held in the system:
1 lock held by pool_workqueue_/3:
#0: ffffffff8e144938 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:336 [inline]
#0: ffffffff8e144938 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x3b9/0x730 kernel/rcu/tree_exp.h:998
1 lock held by khungtaskd/31:
#0: ffffffff8e13ee20 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8e13ee20 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8e13ee20 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6770
2 locks held by getty/5585:
#0: ffff88803086c0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000332b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 drivers/tty/n_tty.c:2222
2 locks held by syz.0.124/6731:
#0: ffff88805108e428 (sb_writers#20){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:557
#1: ffff888059b62740 (&sb->s_type->i_mutex_key#26){++++}-{4:4}, at: inode_lock_killable include/linux/fs.h:874 [inline]
#1: ffff888059b62740 (&sb->s_type->i_mutex_key#26){++++}-{4:4}, at: do_truncate+0x171/0x220 fs/open.c:63
1 lock held by syz.0.124/6770:
#0: ffff888059b62740 (&sb->s_type->i_mutex_key#26){++++}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline]
#0: ffff888059b62740 (&sb->s_type->i_mutex_key#26){++++}-{4:4}, at: process_measurement+0x3d8/0x1a40 security/integrity/ima/ima_main.c:260
2 locks held by syz.5.158/7084:
#0: ffff88805108e0e0 (&type->s_umount_key#65){++++}-{4:4}, at: __super_lock fs/super.c:59 [inline]
#0: ffff88805108e0e0 (&type->s_umount_key#65){++++}-{4:4}, at: super_lock+0x2a9/0x3b0 fs/super.c:121
#1: ffff88805108e950 (&s->s_sync_lock){+.+.}-{4:4}, at: wait_sb_inodes fs/fs-writeback.c:2653 [inline]
#1: ffff88805108e950 (&s->s_sync_lock){+.+.}-{4:4}, at: sync_inodes_sb+0x255/0xa10 fs/fs-writeback.c:2836
2 locks held by syz.3.218/7530:
#0: ffff88805108e0e0 (&type->s_umount_key#65){++++}-{4:4}, at: __super_lock fs/super.c:59 [inline]
#0: ffff88805108e0e0 (&type->s_umount_key#65){++++}-{4:4}, at: super_lock+0x2a9/0x3b0 fs/super.c:121
#1: ffff88805108e950 (&s->s_sync_lock){+.+.}-{4:4}, at: wait_sb_inodes fs/fs-writeback.c:2653 [inline]
#1: ffff88805108e950 (&s->s_sync_lock){+.+.}-{4:4}, at: sync_inodes_sb+0x255/0xa10 fs/fs-writeback.c:2836
2 locks held by syz.6.258/8006:
#0: ffff88805108e0e0 (&type->s_umount_key#65){++++}-{4:4}, at: __super_lock fs/super.c:59 [inline]
#0: ffff88805108e0e0 (&type->s_umount_key#65){++++}-{4:4}, at: super_lock+0x2a9/0x3b0 fs/super.c:121
#1: ffff88805108e950 (&s->s_sync_lock){+.+.}-{4:4}, at: wait_sb_inodes fs/fs-writeback.c:2653 [inline]
#1: ffff88805108e950 (&s->s_sync_lock){+.+.}-{4:4}, at: sync_inodes_sb+0x255/0xa10 fs/fs-writeback.c:2836
2 locks held by syz-executor/8538:
1 lock held by dhcpcd/8685:
#0: ffff8880774d8208 (&sb->s_type->i_mutex_key#10){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline]
#0: ffff8880774d8208 (&sb->s_type->i_mutex_key#10){+.+.}-{4:4}, at: __sock_release net/socket.c:646 [inline]
#0: ffff8880774d8208 (&sb->s_type->i_mutex_key#10){+.+.}-{4:4}, at: sock_close+0x9b/0x240 net/socket.c:1391
2 locks held by syz.2.374/8985:
1 lock held by syz.0.376/8998:
4 locks held by dhcpcd-run-hook/9024:
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc4-syzkaller-00013-g66701750d556 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
nmi_cpu_backtrace+0x39e/0x3d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/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+0xfee/0x1030 kernel/hung_task.c:470
kthread+0x711/0x8a0 kernel/kthread.c:464
ret_from_fork+0x3fc/0x770 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: 9025 Comm: dhcpcd-run-hook Not tainted 6.16.0-rc4-syzkaller-00013-g66701750d556 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:wp_page_copy mm/memory.c:3598 [inline]
RIP: 0010:do_wp_page+0x15c7/0x5800 mm/memory.c:4030
Code: 00 00 e8 bc 66 18 00 49 0f ba 2e 03 48 8b 84 24 b0 00 00 00 42 80 3c 28 00 74 08 4c 89 e7 e8 00 64 18 00 48 c7 c0 00 f0 ff ff <49> 23 04 24 4c 8b 74 24 10 4c 89 b4 24 00 01 00 00 48 89 84 24 08
RSP: 0000:ffffc900056c7a20 EFLAGS: 00000246
RAX: fffffffffffff000 RBX: ffffc900056c7ce0 RCX: ffffffff82094184
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffea00013ab340
RBP: ffffc900056c7bd0 R08: ffffea00013ab347 R09: 1ffffd4000275668
R10: dffffc0000000000 R11: fffff94000275669 R12: ffffc900056c7cf8
R13: dffffc0000000000 R14: ffffea00013ab340 R15: ffffc900056c7d20
FS: 00007f370ba6ac80(0000) GS:ffff888125c84000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f370bd06480 CR3: 0000000034686000 CR4: 00000000003526f0
Call Trace:
handle_pte_fault mm/memory.c:6085 [inline]
__handle_mm_fault+0x1144/0x5620 mm/memory.c:6212
handle_mm_fault+0x2d5/0x7f0 mm/memory.c:6381
do_user_addr_fault+0xa81/0x1390 arch/x86/mm/fault.c:1336
handle_page_fault arch/x86/mm/fault.c:1476 [inline]
exc_page_fault+0x76/0xf0 arch/x86/mm/fault.c:1532
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7f370bb75490
Code: 40 00 c3 0f 1f 80 00 00 00 00 48 83 c4 08 48 89 ef 5b 5d e9 a2 57 04 00 66 90 48 89 ef e8 e8 56 04 00 eb 91 66 0f 1f 44 00 00 05 e6 0f 19 00 00 00 00 00 c3 0f 1f 44 00 00 31 c9 e9 e9 f9 ff
RSP: 002b:00007fff0c13fa68 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 00007fff0c13fa78 RCX: 00007f370bc04670
RDX: 0000000000000000 RSI: 0000000000000018 RDI: 00007f370ba6af60
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000040
R10: 00007f370ba6af50 R11: 0000000000000246 R12: 0000562885463b88
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000