INFO: task syz-executor648:5858 blocked for more than 143 seconds.
Not tainted 6.14.0-rc4-syzkaller-00015-g2a1944bff549 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor648 state:D stack:27320 pid:5858 tgid:5844 ppid:5839 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_write_slowpath+0xeee/0x13b0 kernel/locking/rwsem.c:1176
__down_write_common kernel/locking/rwsem.c:1304 [inline]
__down_write kernel/locking/rwsem.c:1313 [inline]
down_write+0x1d7/0x220 kernel/locking/rwsem.c:1578
inode_lock include/linux/fs.h:877 [inline]
open_last_lookups fs/namei.c:3747 [inline]
path_openat+0x89a/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: 0033:0x7ff656d9bbc9
RSP: 002b:00007ff656d31218 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007ff656e2d6b8 RCX: 00007ff656d9bbc9
RDX: 000000000000275a RSI: 0000400000000080 RDI: 00000000ffffff9c
RBP: 00007ff656e2d6b0 R08: 00007ffef7a0ff07 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000400000000000
R13: 000040000000fcc0 R14: 00004000000000c0 R15: 00007ff656df006b
INFO: task syz-executor648:5861 blocked for more than 144 seconds.
Not tainted 6.14.0-rc4-syzkaller-00015-g2a1944bff549 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor648 state:D stack:27952 pid:5861 tgid:5845 ppid:5840 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_write_slowpath+0xeee/0x13b0 kernel/locking/rwsem.c:1176
__down_write_common kernel/locking/rwsem.c:1304 [inline]
__down_write kernel/locking/rwsem.c:1313 [inline]
down_write+0x1d7/0x220 kernel/locking/rwsem.c:1578
inode_lock include/linux/fs.h:877 [inline]
open_last_lookups fs/namei.c:3747 [inline]
path_openat+0x89a/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: 0033:0x7ff656d9bbc9
RSP: 002b:00007ff656d31218 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007ff656e2d6b8 RCX: 00007ff656d9bbc9
RDX: 000000000000275a RSI: 0000400000000080 RDI: 00000000ffffff9c
RBP: 00007ff656e2d6b0 R08: 00007ffef7a0ff07 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000400000000000
R13: 000040000000fcc0 R14: 00004000000000c0 R15: 00007ff656df006b
INFO: task syz-executor648:5860 blocked for more than 145 seconds.
Not tainted 6.14.0-rc4-syzkaller-00015-g2a1944bff549 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor648 state:D stack:27952 pid:5860 tgid:5846 ppid:5841 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_write_slowpath+0xeee/0x13b0 kernel/locking/rwsem.c:1176
__down_write_common kernel/locking/rwsem.c:1304 [inline]
__down_write kernel/locking/rwsem.c:1313 [inline]
down_write+0x1d7/0x220 kernel/locking/rwsem.c:1578
inode_lock include/linux/fs.h:877 [inline]
open_last_lookups fs/namei.c:3747 [inline]
path_openat+0x89a/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: 0033:0x7ff656d9bbc9
RSP: 002b:00007ff656d31218 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007ff656e2d6b8 RCX: 00007ff656d9bbc9
RDX: 000000000000275a RSI: 0000400000000080 RDI: 00000000ffffff9c
RBP: 00007ff656e2d6b0 R08: 00007ffef7a0ff07 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000400000000000
R13: 000040000000fcc0 R14: 00004000000000c0 R15: 00007ff656df006b
INFO: task syz-executor648:5859 blocked for more than 146 seconds.
Not tainted 6.14.0-rc4-syzkaller-00015-g2a1944bff549 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor648 state:D stack:27952 pid:5859 tgid:5847 ppid:5842 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_write_slowpath+0xeee/0x13b0 kernel/locking/rwsem.c:1176
__down_write_common kernel/locking/rwsem.c:1304 [inline]
__down_write kernel/locking/rwsem.c:1313 [inline]
down_write+0x1d7/0x220 kernel/locking/rwsem.c:1578
inode_lock include/linux/fs.h:877 [inline]
open_last_lookups fs/namei.c:3747 [inline]
path_openat+0x89a/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: 0033:0x7ff656d9bbc9
RSP: 002b:00007ff656d31218 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007ff656e2d6b8 RCX: 00007ff656d9bbc9
RDX: 000000000000275a RSI: 0000400000000080 RDI: 00000000ffffff9c
RBP: 00007ff656e2d6b0 R08: 00007ffef7a0ff07 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000400000000000
R13: 000040000000fcc0 R14: 00004000000000c0 R15: 00007ff656df006b
INFO: task syz-executor648:5862 blocked for more than 147 seconds.
Not tainted 6.14.0-rc4-syzkaller-00015-g2a1944bff549 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor648 state:D stack:27952 pid:5862 tgid:5848 ppid:5843 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_write_slowpath+0xeee/0x13b0 kernel/locking/rwsem.c:1176
__down_write_common kernel/locking/rwsem.c:1304 [inline]
__down_write kernel/locking/rwsem.c:1313 [inline]
down_write+0x1d7/0x220 kernel/locking/rwsem.c:1578
inode_lock include/linux/fs.h:877 [inline]
open_last_lookups fs/namei.c:3747 [inline]
path_openat+0x89a/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: 0033:0x7ff656d9bbc9
RSP: 002b:00007ff656d31218 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007ff656e2d6b8 RCX: 00007ff656d9bbc9
RDX: 000000000000275a RSI: 0000400000000080 RDI: 00000000ffffff9c
RBP: 00007ff656e2d6b0 R08: 00007ffef7a0ff07 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000400000000000
R13: 000040000000fcc0 R14: 00004000000000c0 R15: 00007ff656df006b
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 kswapd0/85:
2 locks held by getty/5590:
#0: ffff888035aea0a0 (&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-executor648/5852:
2 locks held by syz-executor648/5858:
#0: ffff8880351e2420 (sb_writers#9){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:547
#1: ffff888078e90180 (&type->i_mutex_dir_key#6){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:877 [inline]
#1: ffff888078e90180 (&type->i_mutex_dir_key#6){+.+.}-{4:4}, at: open_last_lookups fs/namei.c:3747 [inline]
#1: ffff888078e90180 (&type->i_mutex_dir_key#6){+.+.}-{4:4}, at: path_openat+0x89a/0x3590 fs/namei.c:3986
2 locks held by syz-executor648/5850:
2 locks held by syz-executor648/5861:
#0: ffff88803434c420 (sb_writers#9){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:547
#1: ffff888078e90c00 (&type->i_mutex_dir_key#6){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:877 [inline]
#1: ffff888078e90c00 (&type->i_mutex_dir_key#6){+.+.}-{4:4}, at: open_last_lookups fs/namei.c:3747 [inline]
#1: ffff888078e90c00 (&type->i_mutex_dir_key#6){+.+.}-{4:4}, at: path_openat+0x89a/0x3590 fs/namei.c:3986
2 locks held by syz-executor648/5851:
2 locks held by syz-executor648/5860:
#0: ffff88807d4b2420 (sb_writers#9){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:547
#1: ffff888078e58180 (&type->i_mutex_dir_key#6){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:877 [inline]
#1: ffff888078e58180 (&type->i_mutex_dir_key#6){+.+.}-{4:4}, at: open_last_lookups fs/namei.c:3747 [inline]
#1: ffff888078e58180 (&type->i_mutex_dir_key#6){+.+.}-{4:4}, at: path_openat+0x89a/0x3590 fs/namei.c:3986
2 locks held by syz-executor648/5854:
2 locks held by syz-executor648/5859:
#0: ffff88807d604420 (sb_writers#9){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:547
#1: ffff888078e906c0 (&type->i_mutex_dir_key#6){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:877 [inline]
#1: ffff888078e906c0 (&type->i_mutex_dir_key#6){+.+.}-{4:4}, at: open_last_lookups fs/namei.c:3747 [inline]
#1: ffff888078e906c0 (&type->i_mutex_dir_key#6){+.+.}-{4:4}, at: path_openat+0x89a/0x3590 fs/namei.c:3986
2 locks held by syz-executor648/5853:
2 locks held by syz-executor648/5862:
#0: ffff88807d208420 (sb_writers#9){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:547
#1: ffff888078e91140 (&type->i_mutex_dir_key#6){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:877 [inline]
#1: ffff888078e91140 (&type->i_mutex_dir_key#6){+.+.}-{4:4}, at: open_last_lookups fs/namei.c:3747 [inline]
#1: ffff888078e91140 (&type->i_mutex_dir_key#6){+.+.}-{4:4}, at: path_openat+0x89a/0x3590 fs/namei.c:3986
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.14.0-rc4-syzkaller-00015-g2a1944bff549 #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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5850 Comm: syz-executor648 Not tainted 6.14.0-rc4-syzkaller-00015-g2a1944bff549 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:__sanitizer_cov_trace_switch+0xe/0x120 kernel/kcov.c:331
Code: 0f 1f 84 00 00 00 00 00 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 41 57 41 56 41 54 53 4c 8b 16 <48> 8b 46 08 48 83 c0 f8 48 c1 c0 3d 48 83 f8 02 7f 1f 48 85 c0 74
RSP: 0018:ffffc90004247240 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff88807b0b9e00
RDX: ffff88807b0b9e00 RSI: ffffffff8ee324d0 RDI: 0000000000000000
RBP: 00000000003186d1 R08: ffffffff82e4f600 R09: 0000000000000000
R10: 0000000000000002 R11: fffff52000848e92 R12: ffff88803434c018
R13: ffffc90004247430 R14: 0000000000000000 R15: dffffc0000000000
FS: 00007ff656d526c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055a667bbffe8 CR3: 000000007d460000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
fs32_to_cpu fs/sysv/sysv.h:191 [inline]
block_to_cpu fs/sysv/itree.c:57 [inline]
get_branch+0x23e/0x6e0 fs/sysv/itree.c:101
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: 0033:0x7ff656d9bbc9
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:00007ff656d52218 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007ff656e2d6a8 RCX: 00007ff656d9bbc9
RDX: 000000000000275a RSI: 0000400000000080 RDI: 00000000ffffff9c
RBP: 00007ff656e2d6a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000400000000000
R13: 000040000000fcc0 R14: 00004000000000c0 R15: 00007ff656df006b
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.313 msecs