INFO: task syz-executor448:5850 blocked for more than 143 seconds.
Not tainted 6.14.0-rc4-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor448 state:D stack:27992 pid:5850 tgid:5833 ppid:5828 task_flags:0x400140 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5378 [inline]
__schedule+0x18bc/0x4c40 kernel/sched/core.c:6765
__schedule_loop kernel/sched/core.c:6842 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6857
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6914
rwsem_down_read_slowpath kernel/locking/rwsem.c:1084 [inline]
__down_read_common kernel/locking/rwsem.c:1248 [inline]
__down_read kernel/locking/rwsem.c:1261 [inline]
down_read+0x705/0xa40 kernel/locking/rwsem.c:1526
inode_lock_shared include/linux/fs.h:887 [inline]
lookup_slow+0x45/0x70 fs/namei.c:1809
walk_component+0x2e1/0x410 fs/namei.c:2114
lookup_last fs/namei.c:2612 [inline]
path_lookupat+0x16f/0x450 fs/namei.c:2636
filename_lookup+0x2a3/0x670 fs/namei.c:2665
user_path_at+0x3a/0x60 fs/namei.c:3072
do_mount fs/namespace.c:3897 [inline]
__do_sys_mount fs/namespace.c:4111 [inline]
__se_sys_mount+0x297/0x3c0 fs/namespace.c:4088
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: 0033:0x7f93ae260e09
RSP: 002b:00007f93ae1f6218 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f93ae2f26b8 RCX: 00007f93ae260e09
RDX: 0000000000000000 RSI: 0000400000000140 RDI: 0000000000000000
RBP: 00007f93ae2f26b0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000001000 R11: 0000000000000246 R12: 0000400000000000
R13: 0000400000000100 R14: 0000400000000140 R15: 0030656c69662f2e
INFO: task syz-executor448:5846 blocked for more than 144 seconds.
Not tainted 6.14.0-rc4-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor448 state:D stack:28184 pid:5846 tgid:5834 ppid:5829 task_flags:0x400140 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5378 [inline]
__schedule+0x18bc/0x4c40 kernel/sched/core.c:6765
__schedule_loop kernel/sched/core.c:6842 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6857
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6914
rwsem_down_read_slowpath kernel/locking/rwsem.c:1084 [inline]
__down_read_common kernel/locking/rwsem.c:1248 [inline]
__down_read kernel/locking/rwsem.c:1261 [inline]
down_read+0x705/0xa40 kernel/locking/rwsem.c:1526
inode_lock_shared include/linux/fs.h:887 [inline]
lookup_slow+0x45/0x70 fs/namei.c:1809
walk_component+0x2e1/0x410 fs/namei.c:2114
lookup_last fs/namei.c:2612 [inline]
path_lookupat+0x16f/0x450 fs/namei.c:2636
filename_lookup+0x2a3/0x670 fs/namei.c:2665
user_path_at+0x3a/0x60 fs/namei.c:3072
do_mount fs/namespace.c:3897 [inline]
__do_sys_mount fs/namespace.c:4111 [inline]
__se_sys_mount+0x297/0x3c0 fs/namespace.c:4088
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: 0033:0x7f93ae260e09
RSP: 002b:00007f93ae1f6218 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f93ae2f26b8 RCX: 00007f93ae260e09
RDX: 0000000000000000 RSI: 0000400000000140 RDI: 0000000000000000
RBP: 00007f93ae2f26b0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000001000 R11: 0000000000000246 R12: 0000400000000000
R13: 0000400000000100 R14: 0000400000000140 R15: 0030656c69662f2e
INFO: task syz-executor448:5849 blocked for more than 145 seconds.
Not tainted 6.14.0-rc4-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor448 state:D stack:28816 pid:5849 tgid:5836 ppid:5830 task_flags:0x400140 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5378 [inline]
__schedule+0x18bc/0x4c40 kernel/sched/core.c:6765
__schedule_loop kernel/sched/core.c:6842 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6857
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6914
rwsem_down_read_slowpath kernel/locking/rwsem.c:1084 [inline]
__down_read_common kernel/locking/rwsem.c:1248 [inline]
__down_read kernel/locking/rwsem.c:1261 [inline]
down_read+0x705/0xa40 kernel/locking/rwsem.c:1526
inode_lock_shared include/linux/fs.h:887 [inline]
lookup_slow+0x45/0x70 fs/namei.c:1809
walk_component+0x2e1/0x410 fs/namei.c:2114
lookup_last fs/namei.c:2612 [inline]
path_lookupat+0x16f/0x450 fs/namei.c:2636
filename_lookup+0x2a3/0x670 fs/namei.c:2665
user_path_at+0x3a/0x60 fs/namei.c:3072
do_mount fs/namespace.c:3897 [inline]
__do_sys_mount fs/namespace.c:4111 [inline]
__se_sys_mount+0x297/0x3c0 fs/namespace.c:4088
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: 0033:0x7f93ae260e09
RSP: 002b:00007f93ae1f6218 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f93ae2f26b8 RCX: 00007f93ae260e09
RDX: 0000000000000000 RSI: 0000400000000140 RDI: 0000000000000000
RBP: 00007f93ae2f26b0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000001000 R11: 0000000000000246 R12: 0000400000000000
R13: 0000400000000100 R14: 0000400000000140 R15: 0030656c69662f2e
INFO: task syz-executor448:5848 blocked for more than 146 seconds.
Not tainted 6.14.0-rc4-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor448 state:D stack:28816 pid:5848 tgid:5837 ppid:5832 task_flags:0x400140 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5378 [inline]
__schedule+0x18bc/0x4c40 kernel/sched/core.c:6765
__schedule_loop kernel/sched/core.c:6842 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6857
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6914
rwsem_down_read_slowpath kernel/locking/rwsem.c:1084 [inline]
__down_read_common kernel/locking/rwsem.c:1248 [inline]
__down_read kernel/locking/rwsem.c:1261 [inline]
down_read+0x705/0xa40 kernel/locking/rwsem.c:1526
inode_lock_shared include/linux/fs.h:887 [inline]
lookup_slow+0x45/0x70 fs/namei.c:1809
walk_component+0x2e1/0x410 fs/namei.c:2114
lookup_last fs/namei.c:2612 [inline]
path_lookupat+0x16f/0x450 fs/namei.c:2636
filename_lookup+0x2a3/0x670 fs/namei.c:2665
user_path_at+0x3a/0x60 fs/namei.c:3072
do_mount fs/namespace.c:3897 [inline]
__do_sys_mount fs/namespace.c:4111 [inline]
__se_sys_mount+0x297/0x3c0 fs/namespace.c:4088
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: 0033:0x7f93ae260e09
RSP: 002b:00007f93ae1f6218 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f93ae2f26b8 RCX: 00007f93ae260e09
RDX: 0000000000000000 RSI: 0000400000000140 RDI: 0000000000000000
RBP: 00007f93ae2f26b0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000001000 R11: 0000000000000246 R12: 0000400000000000
R13: 0000400000000100 R14: 0000400000000140 R15: 0030656c69662f2e
INFO: task syz-executor448:5851 blocked for more than 147 seconds.
Not tainted 6.14.0-rc4-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor448 state:D stack:28816 pid:5851 tgid:5838 ppid:5831 task_flags:0x400140 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5378 [inline]
__schedule+0x18bc/0x4c40 kernel/sched/core.c:6765
__schedule_loop kernel/sched/core.c:6842 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6857
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6914
rwsem_down_read_slowpath kernel/locking/rwsem.c:1084 [inline]
__down_read_common kernel/locking/rwsem.c:1248 [inline]
__down_read kernel/locking/rwsem.c:1261 [inline]
down_read+0x705/0xa40 kernel/locking/rwsem.c:1526
inode_lock_shared include/linux/fs.h:887 [inline]
lookup_slow+0x45/0x70 fs/namei.c:1809
walk_component+0x2e1/0x410 fs/namei.c:2114
lookup_last fs/namei.c:2612 [inline]
path_lookupat+0x16f/0x450 fs/namei.c:2636
filename_lookup+0x2a3/0x670 fs/namei.c:2665
user_path_at+0x3a/0x60 fs/namei.c:3072
do_mount fs/namespace.c:3897 [inline]
__do_sys_mount fs/namespace.c:4111 [inline]
__se_sys_mount+0x297/0x3c0 fs/namespace.c:4088
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: 0033:0x7f93ae260e09
RSP: 002b:00007f93ae1f6218 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f93ae2f26b8 RCX: 00007f93ae260e09
RDX: 0000000000000000 RSI: 0000400000000140 RDI: 0000000000000000
RBP: 00007f93ae2f26b0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000001000 R11: 0000000000000246 R12: 0000400000000000
R13: 0000400000000100 R14: 0000400000000140 R15: 0030656c69662f2e
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8eb38f60 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8eb38f60 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8eb38f60 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6746
1 lock held by kswapd0/90:
2 locks held by getty/5589:
#0: ffff88814d67f0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900033332f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x616/0x1770 drivers/tty/n_tty.c:2211
2 locks held by syz-executor448/5840:
1 lock held by syz-executor448/5850:
#0: ffff888073555680 (&type->i_mutex_dir_key#6){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:887 [inline]
#0: ffff888073555680 (&type->i_mutex_dir_key#6){++++}-{4:4}, at: lookup_slow+0x45/0x70 fs/namei.c:1809
2 locks held by syz-executor448/5842:
1 lock held by syz-executor448/5846:
#0: ffff8880735546c0 (&type->i_mutex_dir_key#6){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:887 [inline]
#0: ffff8880735546c0 (&type->i_mutex_dir_key#6){++++}-{4:4}, at: lookup_slow+0x45/0x70 fs/namei.c:1809
2 locks held by syz-executor448/5844:
1 lock held by syz-executor448/5849:
#0: ffff888073555140 (&type->i_mutex_dir_key#6){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:887 [inline]
#0: ffff888073555140 (&type->i_mutex_dir_key#6){++++}-{4:4}, at: lookup_slow+0x45/0x70 fs/namei.c:1809
2 locks held by syz-executor448/5839:
1 lock held by syz-executor448/5848:
#0: ffff888073554180 (&type->i_mutex_dir_key#6){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:887 [inline]
#0: ffff888073554180 (&type->i_mutex_dir_key#6){++++}-{4:4}, at: lookup_slow+0x45/0x70 fs/namei.c:1809
2 locks held by syz-executor448/5841:
1 lock held by syz-executor448/5851:
#0: ffff888073554c00 (&type->i_mutex_dir_key#6){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:887 [inline]
#0: ffff888073554c00 (&type->i_mutex_dir_key#6){++++}-{4:4}, at: lookup_slow+0x45/0x70 fs/namei.c:1809
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.14.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
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:236 [inline]
watchdog+0x1058/0x10a0 kernel/hung_task.c:399
kthread+0x7a9/0x920 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
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
CPU: 1 UID: 0 PID: 5842 Comm: syz-executor448 Not tainted 6.14.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:check_preemption_disabled+0x60/0x120 lib/smp_processor_id.c:19
Code: 00 48 3b 44 24 08 0f 85 ce 00 00 00 89 d8 48 83 c4 10 5b 41 5c 41 5e 41 5f c3 cc cc cc cc 48 c7 04 24 00 00 00 00 9c 8f 04 24 04 24 00 02 00 00 74 c5 49 89 f6 49 89 ff 65 4c 8b 24 25 00 d5
RSP: 0018:ffffc90003e0edc0 EFLAGS: 00000046
RAX: 0000000080000000 RBX: 0000000000000001 RCX: ffff8880351eda00
RDX: ffff8880351eda00 RSI: ffffffff8c2ab680 RDI: ffffffff8c801a80
RBP: 0000000000000003 R08: ffffffff8bfe2a27 R09: 1ffffffff28a2308
R10: dffffc0000000000 R11: fffffbfff28a2309 R12: 0000000000000246
R13: ffff8880351eda00 R14: 00000000ffffffff R15: ffff888148cd4d98
FS: 00007f93ae2176c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000563d027e2600 CR3: 0000000074cee000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lockdep_recursion_finish kernel/locking/lockdep.c:469 [inline]
lock_is_held_type+0x101/0x190 kernel/locking/lockdep.c:5924
lock_is_held include/linux/lockdep.h:249 [inline]
xa_entry include/linux/xarray.h:1220 [inline]
xas_descend lib/xarray.c:208 [inline]
xas_load+0x19c/0x5c0 lib/xarray.c:246
filemap_get_entry+0x1f0/0x3b0 mm/filemap.c:1860
__filemap_get_folio+0x75/0xae0 mm/filemap.c:1905
__find_get_block_slow fs/buffer.c:203 [inline]
__find_get_block+0x287/0x1140 fs/buffer.c:1398
__getblk_slow fs/buffer.c:1127 [inline]
bdev_getblk+0x189/0x670 fs/buffer.c:1431
__bread_gfp+0x86/0x400 fs/buffer.c:1485
sb_bread include/linux/buffer_head.h:346 [inline]
get_branch+0x2c3/0x6e0 fs/sysv/itree.c:102
get_block+0x180/0x16e0 fs/sysv/itree.c:222
block_read_full_folio+0x3ee/0xae0 fs/buffer.c:2396
filemap_read_folio+0x148/0x3b0 mm/filemap.c:2390
do_read_cache_folio+0x373/0x5b0 mm/filemap.c:3960
read_mapping_folio include/linux/pagemap.h:1023 [inline]
dir_get_folio fs/sysv/dir.c:64 [inline]
sysv_find_entry+0x16c/0x590 fs/sysv/dir.c:154
sysv_inode_by_name+0x98/0x2a0 fs/sysv/dir.c:370
sysv_lookup+0x6b/0xe0 fs/sysv/namei.c:38
lookup_open fs/namei.c:3629 [inline]
open_last_lookups fs/namei.c:3750 [inline]
path_openat+0x11b4/0x3590 fs/namei.c:3986
do_filp_open+0x27f/0x4e0 fs/namei.c:4016
do_sys_openat2+0x13e/0x1d0 fs/open.c:1428
do_sys_open fs/open.c:1443 [inline]
__do_sys_openat fs/open.c:1459 [inline]
__se_sys_openat fs/open.c:1454 [inline]
__x64_sys_openat+0x247/0x2a0 fs/open.c:1454
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: 0033:0x7f93ae260e09
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 18 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f93ae217218 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f93ae2f26a8 RCX: 00007f93ae260e09
RDX: 0000000000141842 RSI: 0000400000000100 RDI: 00000000ffffff9c
RBP: 00007f93ae2f26a0 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000017a R11: 0000000000000246 R12: 0000400000000000
R13: 0000400000000100 R14: 0000400000000140 R15: 0030656c69662f2e