INFO: task syz.3.2246:26795 blocked for more than 143 seconds.
Not tainted 6.16.0-rc6-syzkaller-00121-g6832a9317eee #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.2246 state:D stack:25128 pid:26795 tgid:26794 ppid:25931 task_flags:0x400140 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5397 [inline]
__schedule+0x16a2/0x4cb0 kernel/sched/core.c:6786
__schedule_loop kernel/sched/core.c:6864 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6879
percpu_rwsem_wait+0x2e3/0x330 kernel/locking/percpu-rwsem.c:164
__percpu_down_read+0xf0/0x130 kernel/locking/percpu-rwsem.c:180
percpu_down_read_internal include/linux/percpu-rwsem.h:67 [inline]
percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline]
__sb_start_write include/linux/fs.h:1795 [inline]
sb_start_write+0x18e/0x1c0 include/linux/fs.h:1931
mnt_want_write+0x41/0x90 fs/namespace.c:557
filename_create+0x13a/0x470 fs/namei.c:4141
do_mkdirat+0xa0/0x590 fs/namei.c:4400
__do_sys_mkdirat fs/namei.c:4425 [inline]
__se_sys_mkdirat fs/namei.c:4423 [inline]
__x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4423
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: 0033:0x7fb8f298e9a9
RSP: 002b:00007fb8f3798038 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007fb8f2bb5fa0 RCX: 00007fb8f298e9a9
RDX: 0000000000000020 RSI: 00002000000002c0 RDI: ffffffffffffff9c
RBP: 00007fb8f2a10ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fb8f2bb5fa0 R15: 00007ffc962d50e8
INFO: task syz.3.2246:26800 blocked for more than 144 seconds.
Not tainted 6.16.0-rc6-syzkaller-00121-g6832a9317eee #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.2246 state:D stack:26200 pid:26800 tgid:26794 ppid:25931 task_flags:0x400140 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5397 [inline]
__schedule+0x16a2/0x4cb0 kernel/sched/core.c:6786
__schedule_loop kernel/sched/core.c:6864 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6879
percpu_rwsem_wait+0x2e3/0x330 kernel/locking/percpu-rwsem.c:164
__percpu_down_read+0xf0/0x130 kernel/locking/percpu-rwsem.c:180
percpu_down_read_internal include/linux/percpu-rwsem.h:67 [inline]
percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline]
__sb_start_write include/linux/fs.h:1795 [inline]
sb_start_write+0x18e/0x1c0 include/linux/fs.h:1931
mnt_want_write+0x41/0x90 fs/namespace.c:557
open_last_lookups fs/namei.c:3805 [inline]
path_openat+0x85d/0x3830 fs/namei.c:4052
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_open fs/open.c:1460 [inline]
__se_sys_open fs/open.c:1456 [inline]
__x64_sys_open+0x11e/0x150 fs/open.c:1456
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: 0033:0x7fb8f298e9a9
RSP: 002b:00007fb8f3777038 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007fb8f2bb6080 RCX: 00007fb8f298e9a9
RDX: 0000000000000000 RSI: 000000000014927e RDI: 0000200000000180
RBP: 00007fb8f2a10ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fb8f2bb6080 R15: 00007ffc962d50e8
INFO: task syz.3.2246:26827 blocked for more than 144 seconds.
Not tainted 6.16.0-rc6-syzkaller-00121-g6832a9317eee #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.2246 state:D stack:28904 pid:26827 tgid:26794 ppid:25931 task_flags:0x400040 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5397 [inline]
__schedule+0x16a2/0x4cb0 kernel/sched/core.c:6786
__schedule_loop kernel/sched/core.c:6864 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6879
percpu_rwsem_wait+0x2e3/0x330 kernel/locking/percpu-rwsem.c:164
__percpu_down_read+0xf0/0x130 kernel/locking/percpu-rwsem.c:180
percpu_down_read_internal include/linux/percpu-rwsem.h:67 [inline]
percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline]
__sb_start_write include/linux/fs.h:1795 [inline]
sb_start_write+0x18e/0x1c0 include/linux/fs.h:1931
mnt_want_write+0x41/0x90 fs/namespace.c:557
open_last_lookups fs/namei.c:3805 [inline]
path_openat+0x85d/0x3830 fs/namei.c:4052
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_open fs/open.c:1460 [inline]
__se_sys_open fs/open.c:1456 [inline]
__x64_sys_open+0x11e/0x150 fs/open.c:1456
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: 0033:0x7fb8f298e9a9
RSP: 002b:00007fb8f3756038 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007fb8f2bb6160 RCX: 00007fb8f298e9a9
RDX: 389b0d52417bb201 RSI: 0000000000064842 RDI: 00002000000005c0
RBP: 00007fb8f2a10ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fb8f2bb6160 R15: 00007ffc962d50e8
INFO: task syz.3.2246:26830 blocked for more than 144 seconds.
Not tainted 6.16.0-rc6-syzkaller-00121-g6832a9317eee #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.2246 state:D stack:25128 pid:26830 tgid:26794 ppid:25931 task_flags:0x400040 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5397 [inline]
__schedule+0x16a2/0x4cb0 kernel/sched/core.c:6786
__schedule_loop kernel/sched/core.c:6864 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6879
percpu_rwsem_wait+0x2e3/0x330 kernel/locking/percpu-rwsem.c:164
__percpu_down_read+0xf0/0x130 kernel/locking/percpu-rwsem.c:180
percpu_down_read_internal include/linux/percpu-rwsem.h:67 [inline]
percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline]
__sb_start_write include/linux/fs.h:1795 [inline]
sb_start_write+0x18e/0x1c0 include/linux/fs.h:1931
mnt_want_write+0x41/0x90 fs/namespace.c:557
open_last_lookups fs/namei.c:3805 [inline]
path_openat+0x85d/0x3830 fs/namei.c:4052
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_open fs/open.c:1460 [inline]
__se_sys_open fs/open.c:1456 [inline]
__x64_sys_open+0x11e/0x150 fs/open.c:1456
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: 0033:0x7fb8f298e9a9
RSP: 002b:00007fb8f3735038 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007fb8f2bb6240 RCX: 00007fb8f298e9a9
RDX: 0000000000000010 RSI: 0000000000060142 RDI: 0000200000000000
RBP: 00007fb8f2a10ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fb8f2bb6240 R15: 00007ffc962d50e8
Showing all locks held in the system:
3 locks held by kworker/u8:0/12:
2 locks held by ksoftirqd/1/23:
1 lock held by khungtaskd/31:
#0: ffffffff8e13f0e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8e13f0e0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8e13f0e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6770
6 locks held by kworker/u8:2/36:
2 locks held by getty/5594:
#0: ffff888030b9e0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900036cb2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 drivers/tty/n_tty.c:2222
3 locks held by kworker/u8:12/8072:
#0: ffff88801a489148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
#0: ffff88801a489148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0 kernel/workqueue.c:3321
#1: ffffc90003d5fbc0 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
#1: ffffc90003d5fbc0 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0 kernel/workqueue.c:3321
#2: ffffffff8f509988 (rtnl_mutex){+.+.}-{4:4}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:303
1 lock held by syz.3.2246/26795:
#0: ffff8880289b2428 (sb_writers#21){++++}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:557
1 lock held by syz.3.2246/26800:
#0: ffff8880289b2428 (sb_writers#21){++++}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:557
1 lock held by syz.3.2246/26827:
#0: ffff8880289b2428 (sb_writers#21){++++}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:557
1 lock held by syz.3.2246/26830:
#0: ffff8880289b2428 (sb_writers#21){++++}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:557
7 locks held by syz-executor/28933:
#0: ffff8880359ec428 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3096 [inline]
#0: ffff8880359ec428 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x211/0xa90 fs/read_write.c:682
#1: ffff888058adc488 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1e0/0x4f0 fs/kernfs/file.c:325
#2: ffff888143b4af08 (kn->active#52){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x203/0x4f0 fs/kernfs/file.c:326
#3: ffffffff8ed97168 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd1/0x360 drivers/net/netdevsim/bus.c:216
#4: ffff8880340ac0e8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:884 [inline]
#4: ffff8880340ac0e8 (&dev->mutex){....}-{4:4}, at: __device_driver_lock drivers/base/dd.c:1094 [inline]
#4: ffff8880340ac0e8 (&dev->mutex){....}-{4:4}, at: device_release_driver_internal+0xb6/0x7c0 drivers/base/dd.c:1292
#5: ffff888029406250 (&devlink->lock_key#37){+.+.}-{4:4}, at: nsim_drv_remove+0x50/0x160 drivers/net/netdevsim/dev.c:1675
#6: ffffffff8f509988 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
#6: ffffffff8f509988 (rtnl_mutex){+.+.}-{4:4}, at: unregister_netdevice_notifier_net+0x8d/0x2a0 net/core/dev.c:2112
2 locks held by syz-executor/29242:
#0: ffffffff8fa0e798 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8fa0e798 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8fa0e798 (&ops->srcu#2){.+.+}-{0:0}, at: rtnl_link_ops_get+0x23/0x250 net/core/rtnetlink.c:570
#1: ffffffff8f509988 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline]
#1: ffffffff8f509988 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:341 [inline]
#1: ffffffff8f509988 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x8db/0x1c70 net/core/rtnetlink.c:4054
1 lock held by sed/29423:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc6-syzkaller-00121-g6832a9317eee #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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 29425 Comm: cmp Not tainted 6.16.0-rc6-syzkaller-00121-g6832a9317eee #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:mt_is_alloc lib/maple_tree.c:397 [inline]
RIP: 0010:mas_parent_type lib/maple_tree.c:481 [inline]
RIP: 0010:mas_validate_parent_slot lib/maple_tree.c:7396 [inline]
RIP: 0010:mt_validate+0x55b/0x4380 lib/maple_tree.c:7594
Code: bf 06 00 00 00 48 89 de e8 f2 10 61 f6 83 fb 06 75 5c 48 8b 9c 24 10 01 00 00 48 83 c3 40 48 89 d8 48 c1 e8 03 42 0f b6 04 28 <84> c0 0f 85 f6 34 00 00 8b 1b 49 81 e4 00 ff ff ff 89 de 83 e6 01
RSP: 0018:ffffc900040a7120 EFLAGS: 00000a02
RAX: 0000000000000000 RBX: ffff888055138080 RCX: ffff888020f80000
RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000006
RBP: ffffc900040a72f0 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff33fc584 R12: ffff8880a4719c16
R13: dffffc0000000000 R14: 0000000000000002 R15: 000000000000000e
FS: 0000000000000000(0000) GS:ffff888125d59000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007facfdba7eb8 CR3: 0000000093b68000 CR4: 00000000003526f0
Call Trace:
validate_mm+0xb6/0x4b0 mm/vma.c:648
__split_vma+0x8bd/0xa00 mm/vma.c:566
vms_gather_munmap_vmas+0x4ab/0x12b0 mm/vma.c:1375
__mmap_prepare mm/vma.c:2351 [inline]
__mmap_region mm/vma.c:2607 [inline]
mmap_region+0x678/0x1f30 mm/vma.c:2692
do_mmap+0xc45/0x10d0 mm/mmap.c:561
vm_mmap_pgoff+0x31b/0x4c0 mm/util.c:579
ksys_mmap_pgoff+0x51f/0x760 mm/mmap.c:607
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: 0033:0x7facfde92242
Code: 08 00 04 00 00 eb e2 90 41 f7 c1 ff 0f 00 00 75 27 55 89 cd 53 48 89 fb 48 85 ff 74 33 41 89 ea 48 89 df b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 5e 5b 5d c3 0f 1f 00 c7 05 46 40 01 00 16 00
RSP: 002b:00007fffa08402f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007facfdb73000 RCX: 00007facfde92242
RDX: 0000000000000005 RSI: 000000000001c000 RDI: 00007facfdb73000
RBP: 0000000000000812 R08: 0000000000000003 R09: 0000000000008000
R10: 0000000000000812 R11: 0000000000000206 R12: 00007fffa0840348
R13: 00007facfde67ab0 R14: 00007fffa0840770 R15: 00000ffff4108062