INFO: task syz.3.102:7082 blocked for more than 143 seconds.
Not tainted 6.15.0-rc4-syzkaller-gb6ea1680d0ac #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.102 state:D stack:28232 pid:7082 tgid:7081 ppid:6621 task_flags:0x400140 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x116f/0x5de0 kernel/sched/core.c:6767
__schedule_loop kernel/sched/core.c:6845 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:6860
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6917
rwsem_down_read_slowpath+0x62f/0xb60 kernel/locking/rwsem.c:1084
__down_read_common kernel/locking/rwsem.c:1248 [inline]
__down_read kernel/locking/rwsem.c:1261 [inline]
down_read+0xef/0x480 kernel/locking/rwsem.c:1526
i_mmap_lock_read include/linux/fs.h:565 [inline]
__rmap_walk_file+0x50c/0x620 mm/rmap.c:2884
rmap_walk_file+0x174/0x1f0 mm/rmap.c:2930
rmap_walk+0x7a/0xd0 mm/rmap.c:2941
remove_migration_ptes+0x11d/0x1b0 mm/migrate.c:365
unmap_and_move_huge_page mm/migrate.c:1518 [inline]
migrate_hugetlbs mm/migrate.c:1640 [inline]
migrate_pages+0x9f3/0x2350 mm/migrate.c:2070
do_mbind+0x6f0/0xf30 mm/mempolicy.c:1425
kernel_mbind+0x1e3/0x1f0 mm/mempolicy.c:1568
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x230 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f583d78cda9
RSP: 002b:00007f583e56c038 EFLAGS: 00000246 ORIG_RAX: 00000000000000ed
RAX: ffffffffffffffda RBX: 00007f583d9a5fa0 RCX: 00007f583d78cda9
RDX: 0000000100000000 RSI: 0000000100000004 RDI: 0000000000000000
RBP: 00007f583d80e2a0 R08: 0000000000000006 R09: 0000000000000002
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f583d9a5fa0 R15: 00007ffc53ec9b28
INFO: task syz.3.102:7084 blocked for more than 143 seconds.
Not tainted 6.15.0-rc4-syzkaller-gb6ea1680d0ac #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.102 state:D stack:28632 pid:7084 tgid:7081 ppid:6621 task_flags:0x400040 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x116f/0x5de0 kernel/sched/core.c:6767
__schedule_loop kernel/sched/core.c:6845 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:6860
io_schedule+0xbf/0x130 kernel/sched/core.c:7742
folio_wait_bit_common+0x3d6/0x9e0 mm/filemap.c:1317
__folio_lock mm/filemap.c:1664 [inline]
folio_lock include/linux/pagemap.h:1137 [inline]
folio_lock include/linux/pagemap.h:1133 [inline]
__filemap_get_folio+0x77c/0xc10 mm/filemap.c:1917
filemap_lock_folio include/linux/pagemap.h:775 [inline]
filemap_lock_hugetlb_folio include/linux/hugetlb.h:806 [inline]
hugetlbfs_zero_partial_page+0xaf/0x520 fs/hugetlbfs/inode.c:658
hugetlbfs_punch_hole fs/hugetlbfs/inode.c:699 [inline]
hugetlbfs_fallocate+0xf81/0x12e0 fs/hugetlbfs/inode.c:745
vfs_fallocate+0x608/0x10b0 fs/open.c:338
madvise_remove mm/madvise.c:1034 [inline]
madvise_vma_behavior+0x1a75/0x1d50 mm/madvise.c:1263
madvise_walk_vmas+0x1ce/0x2c0 mm/madvise.c:1530
madvise_do_behavior+0x12b/0x3b0 mm/madvise.c:1695
do_madvise mm/madvise.c:1782 [inline]
do_madvise+0x10b/0x170 mm/madvise.c:1773
__do_sys_madvise mm/madvise.c:1790 [inline]
__se_sys_madvise mm/madvise.c:1788 [inline]
__x64_sys_madvise+0xa9/0x110 mm/madvise.c:1788
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x230 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f583d78cda9
RSP: 002b:00007f583e54b038 EFLAGS: 00000246 ORIG_RAX: 000000000000001c
RAX: ffffffffffffffda RBX: 00007f583d9a6080 RCX: 00007f583d78cda9
RDX: 0000000000000009 RSI: 0000000000800034 RDI: 0000000000108000
RBP: 00007f583d80e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f583d9a6080 R15: 00007ffc53ec9b28
INFO: task syz.3.102:7093 blocked for more than 144 seconds.
Not tainted 6.15.0-rc4-syzkaller-gb6ea1680d0ac #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.102 state:D stack:29048 pid:7093 tgid:7081 ppid:6621 task_flags:0x400040 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x116f/0x5de0 kernel/sched/core.c:6767
__schedule_loop kernel/sched/core.c:6845 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:6860
io_schedule+0xbf/0x130 kernel/sched/core.c:7742
migration_entry_wait_on_locked+0x726/0x890 mm/filemap.c:1439
migration_entry_wait_huge+0x2de/0x3f0 mm/migrate.c:428
hugetlb_fault+0x225c/0x2e90 mm/hugetlb.c:6723
handle_mm_fault+0x95d/0xad0 mm/memory.c:6307
do_user_addr_fault+0x7a6/0x1370 arch/x86/mm/fault.c:1388
handle_page_fault arch/x86/mm/fault.c:1480 [inline]
exc_page_fault+0x5c/0xc0 arch/x86/mm/fault.c:1538
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0010:do_strncpy_from_user lib/strncpy_from_user.c:41 [inline]
RIP: 0010:strncpy_from_user+0x147/0x2e0 lib/strncpy_from_user.c:130
Code: 00 00 4d 89 74 1d 00 48 83 ed 08 bf 07 00 00 00 48 83 c3 08 48 89 ee e8 07 bc bb fc 48 83 fd 07 76 22 e8 8c c0 bb fc 45 31 ff <49> 8b 04 1c 31 ff 44 89 fe 49 89 c6 e8 b8 bb bb fc 45 85 ff 0f 84
RSP: 0018:ffffc90003347d10 EFLAGS: 00050246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff84fee9b6
RDX: ffff8880637f5a00 RSI: ffffffff84feea54 RDI: 0000000000000007
RBP: 0000000000000fe0 R08: 0000000000000007 R09: 0000000000000007
R10: 0000000000000fe0 R11: 0000000000000000 R12: 0000000000000000
R13: ffff888073a43320 R14: 0000000000000fe0 R15: 0000000000000000
getname_flags.part.0+0x8f/0x550 fs/namei.c:157
getname_flags+0x93/0xf0 include/linux/audit.h:322
getname include/linux/fs.h:2852 [inline]
do_sys_openat2+0xb8/0x1d0 fs/open.c:1423
do_sys_open fs/open.c:1444 [inline]
__do_sys_openat fs/open.c:1460 [inline]
__se_sys_openat fs/open.c:1455 [inline]
__x64_sys_openat+0x174/0x210 fs/open.c:1455
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x230 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f583d78cda9
RSP: 002b:00007f583e52a038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f583d9a6160 RCX: 00007f583d78cda9
RDX: 0000000000000062 RSI: 0000000000000000 RDI: ffffffffffffff9c
RBP: 00007f583d80e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f583d9a6160 R15: 00007ffc53ec9b28
Showing all locks held in the system:
2 locks held by kworker/u8:1/13:
#0: ffff88801b489148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x12a2/0x1b70 kernel/workqueue.c:3213
#1: ffff8880b8423c48 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x2c1/0x8e0 kernel/sched/psi.c:987
1 lock held by khungtaskd/31:
#0: ffffffff8e3bf440 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8e3bf440 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8e3bf440 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x36/0x1c0 kernel/locking/lockdep.c:6764
2 locks held by getty/5592:
#0: ffff88814d2b10a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc9000333b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x41b/0x14f0 drivers/tty/n_tty.c:2222
1 lock held by syz.3.102/7082:
#0: ffff888032f26788 (&hugetlbfs_i_mmap_rwsem_key){++++}-{4:4}, at: i_mmap_lock_read include/linux/fs.h:565 [inline]
#0: ffff888032f26788 (&hugetlbfs_i_mmap_rwsem_key){++++}-{4:4}, at: __rmap_walk_file+0x50c/0x620 mm/rmap.c:2884
3 locks held by syz.3.102/7084:
#0: ffff8881446fe420 (sb_writers#12){.+.+}-{0:0}, at: madvise_remove mm/madvise.c:1034 [inline]
#0: ffff8881446fe420 (sb_writers#12){.+.+}-{0:0}, at: madvise_vma_behavior+0x1a75/0x1d50 mm/madvise.c:1263
#1: ffff888032f264b8 (&sb->s_type->i_mutex_key#20){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline]
#1: ffff888032f264b8 (&sb->s_type->i_mutex_key#20){+.+.}-{4:4}, at: hugetlbfs_punch_hole fs/hugetlbfs/inode.c:687 [inline]
#1: ffff888032f264b8 (&sb->s_type->i_mutex_key#20){+.+.}-{4:4}, at: hugetlbfs_fallocate+0xce6/0x12e0 fs/hugetlbfs/inode.c:745
#2: ffff888032f26788 (&hugetlbfs_i_mmap_rwsem_key){++++}-{4:4}, at: i_mmap_lock_write include/linux/fs.h:545 [inline]
#2: ffff888032f26788 (&hugetlbfs_i_mmap_rwsem_key){++++}-{4:4}, at: hugetlbfs_punch_hole fs/hugetlbfs/inode.c:695 [inline]
#2: ffff888032f26788 (&hugetlbfs_i_mmap_rwsem_key){++++}-{4:4}, at: hugetlbfs_fallocate+0xd5d/0x12e0 fs/hugetlbfs/inode.c:745
1 lock held by syz.3.102/7093:
#0: ffff88802981dbe0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_trylock include/linux/mmap_lock.h:203 [inline]
#0: ffff88802981dbe0 (&mm->mmap_lock){++++}-{4:4}, at: get_mmap_lock_carefully mm/memory.c:6346 [inline]
#0: ffff88802981dbe0 (&mm->mmap_lock){++++}-{4:4}, at: lock_mm_and_find_vma+0x35/0x6e0 mm/memory.c:6406
1 lock held by syz.4.4332/17663:
#0: ffffffff8e3ca978 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock+0x280/0x3c0 kernel/rcu/tree_exp.h:304
1 lock held by syz.2.4330/17664:
#0: ffffffff8e3ca978 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock+0x1a3/0x3c0 kernel/rcu/tree_exp.h:336
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-rc4-syzkaller-gb6ea1680d0ac #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
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:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:274 [inline]
watchdog+0xf70/0x12c0 kernel/hung_task.c:437
kthread+0x3c2/0x780 kernel/kthread.c:464
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153
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: 13 Comm: kworker/u8:1 Not tainted 6.15.0-rc4-syzkaller-gb6ea1680d0ac #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
Workqueue: bat_events batadv_nc_worker
RIP: 0010:debug_spin_unlock kernel/locking/spinlock_debug.c:102 [inline]
RIP: 0010:do_raw_spin_unlock+0x9c/0x230 kernel/locking/spinlock_debug.c:141
Code: d0 7c 08 84 d2 0f 85 6c 01 00 00 8b 03 85 c0 0f 84 f5 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8d 63 10 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 0f 85 67 01 00 00 65 48 8b 05 9a 39 0b 12 48 39 43 10
RSP: 0000:ffffc90000127a88 EFLAGS: 00000a02
RAX: dffffc0000000000 RBX: ffff8880624d80c0 RCX: ffffffff8197f623
RDX: 1ffff1100c49b01a RSI: 0000000000000004 RDI: ffff8880624d80c0
RBP: dffffc0000000000 R08: 0000000000000000 R09: ffffed100c49b018
R10: ffff8880624d80c3 R11: 0000000000000000 R12: ffff8880624d80d0
R13: ffff8880624d80c0 R14: ffff888061400d80 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff888124aed000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd3f2de6f98 CR3: 00000000626e8000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__raw_spin_unlock_bh include/linux/spinlock_api_smp.h:166 [inline]
_raw_spin_unlock_bh+0x1e/0x30 kernel/locking/spinlock.c:210
spin_unlock_bh include/linux/spinlock.h:396 [inline]
batadv_nc_purge_paths+0x1d4/0x3a0 net/batman-adv/network-coding.c:471
batadv_nc_worker+0x958/0x1030 net/batman-adv/network-coding.c:722
process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3319 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
kthread+0x3c2/0x780 kernel/kthread.c:464
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245