INFO: task syz-executor:5219 blocked for more than 143 seconds.
Not tainted 6.11.0-next-20240927-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:20760 pid:5219 tgid:5219 ppid:5216 flags:0x00000002
Call Trace:
context_switch kernel/sched/core.c:5315 [inline]
__schedule+0x1895/0x4b30 kernel/sched/core.c:6675
__schedule_loop kernel/sched/core.c:6752 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6767
start_this_handle+0x55d/0x2110 fs/jbd2/transaction.c:384
jbd2__journal_start+0x2da/0x5d0 fs/jbd2/transaction.c:505
__ext4_journal_start_sb+0x239/0x600 fs/ext4/ext4_jbd2.c:112
__ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline]
ext4_dirty_inode+0x92/0x110 fs/ext4/inode.c:5981
__mark_inode_dirty+0x2ee/0xe90 fs/fs-writeback.c:2493
generic_update_time fs/inode.c:2126 [inline]
inode_update_time fs/inode.c:2139 [inline]
__file_update_time fs/inode.c:2381 [inline]
file_update_time+0x3d2/0x450 fs/inode.c:2411
ext4_page_mkwrite+0x206/0xdf0 fs/ext4/inode.c:6102
do_page_mkwrite+0x198/0x480 mm/memory.c:3163
wp_page_shared mm/memory.c:3564 [inline]
do_wp_page+0x23d3/0x52d0 mm/memory.c:3714
handle_pte_fault+0x10e3/0x6800 mm/memory.c:5789
__handle_mm_fault mm/memory.c:5916 [inline]
handle_mm_fault+0x11c6/0x1d00 mm/memory.c:6084
do_user_addr_fault arch/x86/mm/fault.c:1338 [inline]
handle_page_fault arch/x86/mm/fault.c:1481 [inline]
exc_page_fault+0x459/0x8c0 arch/x86/mm/fault.c:1539
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7f8fb4867344
RSP: 002b:00007ffe02a5eb80 EFLAGS: 00010202
RAX: 00007f8fb2810000 RBX: 000055556c237f90 RCX: 0000000000000006
RDX: 1ffffffff03fd726 RSI: 000055556c238348 RDI: 0000000000000040
RBP: 00007ffe02a5f060 R08: 000055556c238360 R09: 0000000000003ae4
R10: 00007f8fb57d30b8 R11: 0000000000000246 R12: 00007ffe02a5eeb0
R13: 0000000000000005 R14: 00007ffe02a5ebf0 R15: 00007ffe02a5ecc0
INFO: task syz-executor:5462 blocked for more than 144 seconds.
Not tainted 6.11.0-next-20240927-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:20608 pid:5462 tgid:5462 ppid:5452 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:5315 [inline]
__schedule+0x1895/0x4b30 kernel/sched/core.c:6675
__schedule_loop kernel/sched/core.c:6752 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6767
start_this_handle+0x55d/0x2110 fs/jbd2/transaction.c:384
jbd2__journal_start+0x2da/0x5d0 fs/jbd2/transaction.c:505
__ext4_journal_start_sb+0x239/0x600 fs/ext4/ext4_jbd2.c:112
__ext4_new_inode+0x1488/0x4380 fs/ext4/ialloc.c:1078
ext4_mkdir+0x425/0xcf0 fs/ext4/namei.c:3017
vfs_mkdir+0x2f9/0x4f0 fs/namei.c:4266
do_mkdirat+0x264/0x3a0 fs/namei.c:4289
__do_sys_mkdirat fs/namei.c:4304 [inline]
__se_sys_mkdirat fs/namei.c:4302 [inline]
__x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4302
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1fb1d7c897
RSP: 002b:00007fff204a3a38 EFLAGS: 00000206 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f1fb1df0685 RCX: 00007f1fb1d7c897
RDX: 00000000000001ff RSI: 00007f1fb1df0685 RDI: 00000000ffffff9c
RBP: 00007f1fb1f36a38 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 000000000000000c
R13: 0000000000000003 R14: 0000000000000009 R15: 0000000000000000
INFO: task syz-executor:5464 blocked for more than 144 seconds.
Not tainted 6.11.0-next-20240927-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:24128 pid:5464 tgid:5464 ppid:5219 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:5315 [inline]
__schedule+0x1895/0x4b30 kernel/sched/core.c:6675
__schedule_loop kernel/sched/core.c:6752 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6767
start_this_handle+0x55d/0x2110 fs/jbd2/transaction.c:384
jbd2__journal_start+0x2da/0x5d0 fs/jbd2/transaction.c:505
__ext4_journal_start_sb+0x239/0x600 fs/ext4/ext4_jbd2.c:112
__ext4_new_inode+0x1488/0x4380 fs/ext4/ialloc.c:1078
ext4_mkdir+0x425/0xcf0 fs/ext4/namei.c:3017
vfs_mkdir+0x2f9/0x4f0 fs/namei.c:4266
do_mkdirat+0x264/0x3a0 fs/namei.c:4289
__do_sys_mkdir fs/namei.c:4309 [inline]
__se_sys_mkdir fs/namei.c:4307 [inline]
__x64_sys_mkdir+0x6c/0x80 fs/namei.c:4307
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f60ac97c867
RSP: 002b:00007ffd1a8fe048 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007ffd1a8fe192 RCX: 00007f60ac97c867
RDX: 0000000011dbd409 RSI: 00000000000001c0 RDI: 00007ffd1a8fe180
RBP: f49998db0aa753ff R08: 0000000000000004 R09: 0000000000000001
R10: 00007f60ad7e10b8 R11: 0000000000000246 R12: 8421084210842109
R13: 00007ffd1a8fe192 R14: 00007f60aca11960 R15: 0000000011dbd409
INFO: task syz.3.43:5465 blocked for more than 145 seconds.
Not tainted 6.11.0-next-20240927-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.43 state:D stack:26456 pid:5465 tgid:5465 ppid:5242 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5315 [inline]
__schedule+0x1895/0x4b30 kernel/sched/core.c:6675
__schedule_loop kernel/sched/core.c:6752 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6767
start_this_handle+0x55d/0x2110 fs/jbd2/transaction.c:384
jbd2__journal_start+0x2da/0x5d0 fs/jbd2/transaction.c:505
__ext4_journal_start_sb+0x239/0x600 fs/ext4/ext4_jbd2.c:112
__ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline]
ext4_dirty_inode+0x92/0x110 fs/ext4/inode.c:5981
__mark_inode_dirty+0x2ee/0xe90 fs/fs-writeback.c:2493
generic_update_time fs/inode.c:2126 [inline]
inode_update_time fs/inode.c:2139 [inline]
__file_update_time fs/inode.c:2381 [inline]
file_update_time+0x3d2/0x450 fs/inode.c:2411
ext4_page_mkwrite+0x206/0xdf0 fs/ext4/inode.c:6102
do_page_mkwrite+0x198/0x480 mm/memory.c:3163
do_shared_fault mm/memory.c:5359 [inline]
do_fault mm/memory.c:5421 [inline]
do_pte_missing mm/memory.c:3966 [inline]
handle_pte_fault+0x11fa/0x6800 mm/memory.c:5773
__handle_mm_fault mm/memory.c:5916 [inline]
handle_mm_fault+0x11c6/0x1d00 mm/memory.c:6084
do_user_addr_fault arch/x86/mm/fault.c:1338 [inline]
handle_page_fault arch/x86/mm/fault.c:1481 [inline]
exc_page_fault+0x459/0x8c0 arch/x86/mm/fault.c:1539
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7fb2dd051b84
RSP: 002b:00007ffee78fa350 EFLAGS: 00010246
RAX: 00000000003ffdf0 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000001b32720000 RSI: 0000000000400000 RDI: 00007fb2dd271f90
RBP: 00007ffee78fa5ac R08: 0000000000000004 R09: 0000000000040000
R10: 0000000000000011 R11: 0000000000000293 R12: 0000000000000032
R13: 000000000001214a R14: 0000000000012061 R15: 00007ffee78fa600
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e937de0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e937de0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e937de0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6720
4 locks held by kworker/u8:3/52:
#0: ffff88801daf3948 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
#0: ffff88801daf3948 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
#1: ffffc90000bd7d00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
#1: ffffc90000bd7d00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
#2: ffff88802eb6e0e0 (&type->s_umount_key#32){++++}-{3:3}, at: super_trylock_shared+0x22/0xf0 fs/super.c:562
#3: ffff88802f480b98 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_writepages_down_read fs/ext4/ext4.h:1772 [inline]
#3: ffff88802f480b98 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_writepages+0x1bf/0x3c0 fs/ext4/inode.c:2812
2 locks held by getty/4988:
#0: ffff88802e80c0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
2 locks held by syz-executor/5219:
#0: ffff88807da9c148 (&vma->vm_lock->lock){++++}-{3:3}, at: vma_start_read include/linux/mm.h:704 [inline]
#0: ffff88807da9c148 (&vma->vm_lock->lock){++++}-{3:3}, at: lock_vma_under_rcu+0x34b/0x790 mm/memory.c:6250
#1: ffff88802eb6e518 (sb_pagefaults){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1721 [inline]
#1: ffff88802eb6e518 (sb_pagefaults){.+.+}-{0:0}, at: sb_start_pagefault include/linux/fs.h:1886 [inline]
#1: ffff88802eb6e518 (sb_pagefaults){.+.+}-{0:0}, at: ext4_page_mkwrite+0x1ef/0xdf0 fs/ext4/inode.c:6101
3 locks held by syz.0.42/5458:
#0: ffff88802eb6e420 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write_file+0x5e/0x200 fs/namespace.c:559
#1: ffff88802f482160 (&journal->j_barrier){+.+.}-{3:3}, at: jbd2_journal_lock_updates+0x2b4/0x380 fs/jbd2/transaction.c:889
#2: ffff88802f4823e8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: jbd2_journal_flush+0x1ce/0xc10 fs/jbd2/journal.c:2455
2 locks held by syz-executor/5462:
#0: ffff88802eb6e420 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:515
#1: ffff8880618bdd20 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:850 [inline]
#1: ffff8880618bdd20 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: filename_create+0x260/0x540 fs/namei.c:4035
2 locks held by syz-executor/5464:
#0: ffff88802eb6e420 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:515
#1: ffff88807e2c0de0 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:850 [inline]
#1: ffff88807e2c0de0 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: filename_create+0x260/0x540 fs/namei.c:4035
2 locks held by syz.3.43/5465:
#0: ffff888028019df0 (&vma->vm_lock->lock){++++}-{3:3}, at: vma_start_read include/linux/mm.h:704 [inline]
#0: ffff888028019df0 (&vma->vm_lock->lock){++++}-{3:3}, at: lock_vma_under_rcu+0x34b/0x790 mm/memory.c:6250
#1: ffff88802eb6e518 (sb_pagefaults){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1721 [inline]
#1: ffff88802eb6e518 (sb_pagefaults){.+.+}-{0:0}, at: sb_start_pagefault include/linux/fs.h:1886 [inline]
#1: ffff88802eb6e518 (sb_pagefaults){.+.+}-{0:0}, at: ext4_page_mkwrite+0x1ef/0xdf0 fs/ext4/inode.c:6101
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-next-20240927-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
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:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xff4/0x1040 kernel/hung_task.c:379
kthread+0x2f0/0x390 kernel/kthread.c:389
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 0 to CPUs 1:
NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:106 [inline]
NMI backtrace for cpu 1 skipped: idling at acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:111