INFO: task syz.1.433:7954 blocked for more than 143 seconds.
Not tainted 6.12.0-syzkaller-09073-g9f16d5e6f220 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.433 state:D stack:27328 pid:7954 tgid:7947 ppid:5842 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0x1850/0x4c30 kernel/sched/core.c:6756
__schedule_loop kernel/sched/core.c:6833 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6848
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6905
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:828 [inline]
lookup_slow+0x45/0x70 fs/namei.c:1807
walk_component+0x2e1/0x410 fs/namei.c:2112
lookup_last fs/namei.c:2610 [inline]
path_lookupat+0x16f/0x450 fs/namei.c:2634
filename_lookup+0x2a3/0x670 fs/namei.c:2663
user_path_at+0x3a/0x60 fs/namei.c:3070
do_mount fs/namespace.c:3844 [inline]
__do_sys_mount fs/namespace.c:4057 [inline]
__se_sys_mount+0x297/0x3c0 fs/namespace.c:4034
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: 0033:0x7f9cd037e819
RSP: 002b:00007f9cd10a0038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f9cd0536240 RCX: 00007f9cd037e819
RDX: 0000000020000040 RSI: 00000000200000c0 RDI: 0000000000000000
RBP: 00007f9cd03f175e R08: 0000000020000440 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f9cd0536240 R15: 00007ffdc269dd18
INFO: task syz.1.433:7955 blocked for more than 146 seconds.
Not tainted 6.12.0-syzkaller-09073-g9f16d5e6f220 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.433 state:D stack:27328 pid:7955 tgid:7947 ppid:5842 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0x1850/0x4c30 kernel/sched/core.c:6756
__schedule_loop kernel/sched/core.c:6833 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6848
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6905
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:828 [inline]
lookup_slow+0x45/0x70 fs/namei.c:1807
walk_component+0x2e1/0x410 fs/namei.c:2112
lookup_last fs/namei.c:2610 [inline]
path_lookupat+0x16f/0x450 fs/namei.c:2634
filename_lookup+0x2a3/0x670 fs/namei.c:2663
user_path_at+0x3a/0x60 fs/namei.c:3070
__do_sys_chdir fs/open.c:553 [inline]
__se_sys_chdir+0xbc/0x220 fs/open.c:547
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: 0033:0x7f9cd037e819
RSP: 002b:00007f9ccd9f2038 EFLAGS: 00000246 ORIG_RAX: 0000000000000050
RAX: ffffffffffffffda RBX: 00007f9cd0536320 RCX: 00007f9cd037e819
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000140
RBP: 00007f9cd03f175e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f9cd0536320 R15: 00007ffdc269dd18
INFO: task syz.1.433:7957 blocked for more than 147 seconds.
Not tainted 6.12.0-syzkaller-09073-g9f16d5e6f220 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.433 state:D stack:27328 pid:7957 tgid:7947 ppid:5842 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0x1850/0x4c30 kernel/sched/core.c:6756
__schedule_loop kernel/sched/core.c:6833 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6848
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6905
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:828 [inline]
lookup_slow+0x45/0x70 fs/namei.c:1807
walk_component+0x2e1/0x410 fs/namei.c:2112
lookup_last fs/namei.c:2610 [inline]
path_lookupat+0x16f/0x450 fs/namei.c:2634
filename_lookup+0x2a3/0x670 fs/namei.c:2663
do_linkat+0x13f/0x6f0 fs/namei.c:4843
__do_sys_link fs/namei.c:4897 [inline]
__se_sys_link fs/namei.c:4895 [inline]
__x64_sys_link+0x82/0x90 fs/namei.c:4895
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: 0033:0x7f9cd037e819
RSP: 002b:00007f9ccd5cf038 EFLAGS: 00000246 ORIG_RAX: 0000000000000056
RAX: ffffffffffffffda RBX: 00007f9cd0536400 RCX: 00007f9cd037e819
RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000020000200
RBP: 00007f9cd03f175e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f9cd0536400 R15: 00007ffdc269dd18
INFO: task syz.1.433:7960 blocked for more than 148 seconds.
Not tainted 6.12.0-syzkaller-09073-g9f16d5e6f220 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.433 state:D stack:27328 pid:7960 tgid:7947 ppid:5842 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0x1850/0x4c30 kernel/sched/core.c:6756
__schedule_loop kernel/sched/core.c:6833 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6848
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6905
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:828 [inline]
open_last_lookups fs/namei.c:3747 [inline]
path_openat+0x88b/0x3590 fs/namei.c:3984
do_filp_open+0x27f/0x4e0 fs/namei.c:4014
do_sys_openat2+0x13e/0x1d0 fs/open.c:1402
do_sys_open fs/open.c:1417 [inline]
__do_sys_open fs/open.c:1425 [inline]
__se_sys_open fs/open.c:1421 [inline]
__x64_sys_open+0x225/0x270 fs/open.c:1421
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: 0033:0x7f9cd037e819
RSP: 002b:00007f9ccd1ac038 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007f9cd05364e0 RCX: 00007f9cd037e819
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000140
RBP: 00007f9cd03f175e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f9cd05364e0 R15: 00007ffdc269dd18
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e93c520 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e93c520 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e93c520 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6744
2 locks held by getty/5592:
#0: ffff8880349510a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002fd62f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
6 locks held by kworker/1:7/5989:
2 locks held by syz.1.433/7953:
1 lock held by syz.1.433/7954:
#0: ffff888055470180 (&type->i_mutex_dir_key#27){.+.+}-{4:4}, at: inode_lock_shared include/linux/fs.h:828 [inline]
#0: ffff888055470180 (&type->i_mutex_dir_key#27){.+.+}-{4:4}, at: lookup_slow+0x45/0x70 fs/namei.c:1807
1 lock held by syz.1.433/7955:
#0: ffff888055470180 (&type->i_mutex_dir_key#27){.+.+}-{4:4}, at: inode_lock_shared include/linux/fs.h:828 [inline]
#0: ffff888055470180 (&type->i_mutex_dir_key#27){.+.+}-{4:4}, at: lookup_slow+0x45/0x70 fs/namei.c:1807
1 lock held by syz.1.433/7957:
#0: ffff888055470180 (&type->i_mutex_dir_key#27){.+.+}-{4:4}, at: inode_lock_shared include/linux/fs.h:828 [inline]
#0: ffff888055470180 (&type->i_mutex_dir_key#27){.+.+}-{4:4}, at: lookup_slow+0x45/0x70 fs/namei.c:1807
1 lock held by syz.1.433/7960:
#0: ffff888055470180 (&type->i_mutex_dir_key#27){.+.+}-{4:4}, at: inode_lock_shared include/linux/fs.h:828 [inline]
#0: ffff888055470180 (&type->i_mutex_dir_key#27){.+.+}-{4:4}, at: open_last_lookups fs/namei.c:3747 [inline]
#0: ffff888055470180 (&type->i_mutex_dir_key#27){.+.+}-{4:4}, at: path_openat+0x88b/0x3590 fs/namei.c:3984
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-syzkaller-09073-g9f16d5e6f220 #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+0x2f2/0x390 kernel/kthread.c:389
ret_from_fork+0x4d/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
CPU: 1 UID: 0 PID: 7953 Comm: syz.1.433 Not tainted 6.12.0-syzkaller-09073-g9f16d5e6f220 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:PagePoisoned include/linux/page-flags.h:293 [inline]
RIP: 0010:page_to_nid include/linux/mm.h:1647 [inline]
RIP: 0010:page_pgdat include/linux/mm.h:1873 [inline]
RIP: 0010:folio_pgdat include/linux/mm.h:1883 [inline]
RIP: 0010:slab_pgdat mm/slab.h:201 [inline]
RIP: 0010:__memcg_slab_free_hook+0x1e4/0x310 mm/memcontrol.c:3034
Code: 89 d4 49 c1 ec 03 43 0f b6 04 3c 84 c0 0f 85 b7 00 00 00 8b 32 83 c6 08 4c 89 f7 ba 01 00 00 00 e8 91 e4 ff ff 48 8b 5c 24 08 <48> 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 f6 dc f6 ff
RSP: 0018:ffffc9000be36028 EFLAGS: 00000246
RAX: 330adf167fea2c00 RBX: ffffea0000e6a000 RCX: ffffffff81718eba
RDX: dffffc0000000000 RSI: ffffffff8c0ad8a0 RDI: 0000000000000000
RBP: ffff888029edea20 R08: ffffffff942eea57 R09: 1ffffffff285dd4a
R10: dffffc0000000000 R11: fffffbfff285dd4b R12: 1ffff110281561bb
R13: 0000000000000000 R14: ffff88814672d400 R15: dffffc0000000000
FS: 00007f9cd10c16c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c486482 CR3: 000000002f37e000 CR4: 0000000000350ef0
Call Trace:
memcg_slab_free_hook mm/slub.c:2182 [inline]
slab_free mm/slub.c:4576 [inline]
kmem_cache_free+0x234/0x420 mm/slub.c:4681
free_buffer_head+0x54/0x240 fs/buffer.c:3031
try_to_free_buffers+0x311/0x5f0 fs/buffer.c:2972
shrink_folio_list+0x240c/0x8cc0 mm/vmscan.c:1433
evict_folios+0x5568/0x7be0 mm/vmscan.c:4593
try_to_shrink_lruvec+0x9a6/0xc70 mm/vmscan.c:4789
lru_gen_shrink_lruvec mm/vmscan.c:4938 [inline]
shrink_lruvec+0x53c/0x3160 mm/vmscan.c:5693
shrink_node_memcgs mm/vmscan.c:5929 [inline]
shrink_node+0xb15/0x3e50 mm/vmscan.c:5970
shrink_zones mm/vmscan.c:6215 [inline]
do_try_to_free_pages+0x78c/0x1cf0 mm/vmscan.c:6277
try_to_free_mem_cgroup_pages+0x48c/0xad0 mm/vmscan.c:6609
try_charge_memcg+0x8c7/0x1150 mm/memcontrol.c:2238
try_charge mm/memcontrol-v1.h:19 [inline]
charge_memcg+0xa6/0x1e0 mm/memcontrol.c:4497
__mem_cgroup_charge+0x27/0x80 mm/memcontrol.c:4512
mem_cgroup_charge include/linux/memcontrol.h:646 [inline]
filemap_add_folio+0xb3/0x650 mm/filemap.c:966
do_read_cache_folio+0x341/0x850 mm/filemap.c:3793
read_mapping_folio include/linux/pagemap.h:1011 [inline]
dir_get_folio fs/sysv/dir.c:64 [inline]
sysv_find_entry+0x16a/0x4b0 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_one_qstr_excl+0x121/0x260 fs/namei.c:1692
filename_create+0x297/0x540 fs/namei.c:4081
do_mkdirat+0xbd/0x3a0 fs/namei.c:4326
__do_sys_mkdirat fs/namei.c:4349 [inline]
__se_sys_mkdirat fs/namei.c:4347 [inline]
__x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4347
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: 0033:0x7f9cd037e819
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f9cd10c1038 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f9cd0536160 RCX: 00007f9cd037e819
RDX: 0000000000000000 RSI: 0000000020000340 RDI: ffffffffffffff9c
RBP: 00007f9cd03f175e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f9cd0536160 R15: 00007ffdc269dd18