INFO: task syz.7.185:7583 blocked for more than 143 seconds.
Not tainted 6.15.0-syzkaller-03589-gfeacb1774bd5 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.7.185 state:D stack:28936 pid:7583 tgid:7567 ppid:6410 task_flags:0x400040 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5392 [inline]
__schedule+0x16a2/0x4cb0 kernel/sched/core.c:6781
__schedule_loop kernel/sched/core.c:6859 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6874
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6931
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_nested+0x1b5/0x200 kernel/locking/rwsem.c:1694
inode_lock_nested include/linux/fs.h:912 [inline]
lock_rename fs/namei.c:3272 [inline]
do_renameat2+0x3dd/0xc50 fs/namei.c:5223
__do_sys_rename fs/namei.c:5324 [inline]
__se_sys_rename fs/namei.c:5322 [inline]
__x64_sys_rename+0x82/0x90 fs/namei.c:5322
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: 0033:0x7f96d858e969
RSP: 002b:00007f96d936c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 00007f96d87b6080 RCX: 00007f96d858e969
RDX: 0000000000000000 RSI: 00002000000000c0 RDI: 0000200000000040
RBP: 00007f96d8610ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f96d87b6080 R15: 00007ffe6b1a6cb8
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff8df3ccc0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8df3ccc0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8df3ccc0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6770
5 locks held by kworker/u8:3/49:
6 locks held by kworker/u8:4/66:
#0: ffff88801aef3948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
#0: ffff88801aef3948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0 kernel/workqueue.c:3321
#1: ffffc9000213fbc0 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
#1: ffffc9000213fbc0 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0 kernel/workqueue.c:3321
#2: ffffffff8f2e6bd0 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0x145/0xbd0 net/core/net_namespace.c:608
#3: ffff88805ea2a0e8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:884 [inline]
#3: ffff88805ea2a0e8 (&dev->mutex){....}-{4:4}, at: devl_dev_lock net/devlink/devl_internal.h:108 [inline]
#3: ffff88805ea2a0e8 (&dev->mutex){....}-{4:4}, at: devlink_pernet_pre_exit+0x10a/0x3d0 net/devlink/core.c:506
#4: ffff88805ea2c250 (&devlink->lock_key#18){+.+.}-{4:4}, at: devl_lock net/devlink/core.c:276 [inline]
#4: ffff88805ea2c250 (&devlink->lock_key#18){+.+.}-{4:4}, at: devl_dev_lock net/devlink/devl_internal.h:109 [inline]
#4: ffff88805ea2c250 (&devlink->lock_key#18){+.+.}-{4:4}, at: devlink_pernet_pre_exit+0x11c/0x3d0 net/devlink/core.c:506
#5: ffffffff8df426c0 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x570 kernel/rcu/tree.c:3782
4 locks held by kworker/u8:5/1052:
#0: ffff88801faaa148 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
#0: ffff88801faaa148 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0 kernel/workqueue.c:3321
#1: ffffc90003b2fbc0 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
#1: ffffc90003b2fbc0 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0 kernel/workqueue.c:3321
#2: ffff8880288880e0 (&type->s_umount_key#103){++++}-{4:4}, at: super_trylock_shared+0x20/0xf0 fs/super.c:563
#3: ffff88805b3be730 (&jfs_ip->commit_mutex){+.+.}-{4:4}, at: jfs_commit_inode+0x1ca/0x530 fs/jfs/inode.c:102
5 locks held by kworker/u8:7/3442:
2 locks held by getty/5579:
#0: ffff888030d260a0 (&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
4 locks held by syz.7.185/7568:
2 locks held by syz.7.185/7583:
#0: ffff888028888428 (sb_writers#25){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:557
#1: ffff88805b3beae0 (&type->i_mutex_dir_key#21/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:912 [inline]
#1: ffff88805b3beae0 (&type->i_mutex_dir_key#21/1){+.+.}-{4:4}, at: lock_rename fs/namei.c:3272 [inline]
#1: ffff88805b3beae0 (&type->i_mutex_dir_key#21/1){+.+.}-{4:4}, at: do_renameat2+0x3dd/0xc50 fs/namei.c:5223
2 locks held by syz.5.208/7895:
#0: ffff8880288880e0 (&type->s_umount_key#103){++++}-{4:4}, at: __super_lock fs/super.c:59 [inline]
#0: ffff8880288880e0 (&type->s_umount_key#103){++++}-{4:4}, at: super_lock+0x2a9/0x3b0 fs/super.c:121
#1: ffff888142bce7d0 (&bdi->wb_switch_rwsem){+.+.}-{4:4}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:387 [inline]
#1: ffff888142bce7d0 (&bdi->wb_switch_rwsem){+.+.}-{4:4}, at: sync_inodes_sb+0x19f/0xa10 fs/fs-writeback.c:2831
1 lock held by syz-executor/9174:
2 locks held by syz.0.332/9191:
2 locks held by syz.0.332/9194:
#0: ffff88805fd56428 (sb_writers#5){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:557
#1: ffff8880290c29f8 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: inode_lock_killable include/linux/fs.h:872 [inline]
#1: ffff8880290c29f8 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: do_truncate+0x171/0x220 fs/open.c:63
3 locks held by syz.0.332/9195:
5 locks held by dhcpcd-run-hook/9202:
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-syzkaller-03589-gfeacb1774bd5 #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:274 [inline]
watchdog+0xfee/0x1030 kernel/hung_task.c:437
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: 9208 Comm: dhcpcd-run-hook Not tainted 6.15.0-syzkaller-03589-gfeacb1774bd5 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:_compound_head include/linux/page-flags.h:282 [inline]
RIP: 0010:zap_present_ptes mm/memory.c:1567 [inline]
RIP: 0010:do_zap_pte_range mm/memory.c:1687 [inline]
RIP: 0010:zap_pte_range mm/memory.c:1731 [inline]
RIP: 0010:zap_pmd_range mm/memory.c:1823 [inline]
RIP: 0010:zap_pud_range mm/memory.c:1852 [inline]
RIP: 0010:zap_p4d_range mm/memory.c:1873 [inline]
RIP: 0010:unmap_page_range+0xf17/0x4580 mm/memory.c:1894
Code: 48 89 c3 4c 8d 78 08 4c 89 f8 48 c1 e8 03 49 bd 00 00 00 00 00 fc ff df 42 80 3c 28 00 74 08 4c 89 ff e8 cc 70 19 00 4d 8b 3f <4c> 89 fe 48 83 e6 01 31 ff e8 8b ba b8 ff 4c 89 f8 48 83 e0 01 0f
RSP: 0018:ffffc90004d572c0 EFLAGS: 00000246
RAX: 1ffffd400005af49 RBX: ffffea00002d7a40 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 000000000001279f RDI: 000000000000b5e9
RBP: ffffc90004d57570 R08: ffffea00002d7ab3 R09: 1ffffd400005af56
R10: dffffc0000000000 R11: fffff9400005af57 R12: ffff888029616558
R13: dffffc0000000000 R14: ffffc90004d57740 R15: ffffea00002d7a88
FS: 0000000000000000(0000) GS:ffff8881260c0000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f55e5e12000 CR3: 0000000034b08000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
unmap_vmas+0x25d/0x3c0 mm/memory.c:1984
exit_mmap+0x245/0xba0 mm/mmap.c:1284
__mmput+0x118/0x420 kernel/fork.c:1381
exec_mmap+0x680/0x7a0 fs/exec.c:949
begin_new_exec+0x129c/0x2120 fs/exec.c:1204
load_elf_binary+0x96a/0x2790 fs/binfmt_elf.c:995
search_binary_handler fs/exec.c:1718 [inline]
exec_binprm fs/exec.c:1750 [inline]
bprm_execve+0x999/0x1440 fs/exec.c:1802
do_execveat_common+0x510/0x6a0 fs/exec.c:1908
do_execve fs/exec.c:1982 [inline]
__do_sys_execve fs/exec.c:2058 [inline]
__se_sys_execve fs/exec.c:2053 [inline]
__x64_sys_execve+0x94/0xb0 fs/exec.c:2053
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: 0033:0x7fd5da6f2107
Code: Unable to access opcode bytes at 0x7fd5da6f20dd.
RSP: 002b:00007ffdbd4f4158 EFLAGS: 00000246 ORIG_RAX: 000000000000003b
RAX: ffffffffffffffda RBX: 000055c089135078 RCX: 00007fd5da6f2107
RDX: 000055c0891350a0 RSI: 000055c089135078 RDI: 000055c089135130
RBP: 000055c089135130 R08: 00007ffdbd4f9e5f R09: 0000000000000000
R10: 0000000000000008 R11: 0000000000000246 R12: 000055c0891350a0
R13: 00007fd5da8b7e8b R14: 000055c0891350a0 R15: 0000000000000000