INFO: task kworker/u8:4:63 blocked for more than 143 seconds.
Not tainted 6.12.0-rc3-syzkaller-00403-gf9e4825524aa #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:4 state:D stack:21488 pid:63 tgid:63 ppid:2 flags:0x00004000
Workqueue: writeback wb_workfn (flush-7:2)
Call Trace:
context_switch kernel/sched/core.c:5322 [inline]
__schedule+0x1843/0x4ae0 kernel/sched/core.c:6682
__schedule_loop kernel/sched/core.c:6759 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6774
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6831
__mutex_lock_common kernel/locking/mutex.c:684 [inline]
__mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752
jfs_commit_inode+0x24a/0x590 fs/jfs/inode.c:102
jfs_write_inode+0x143/0x220 fs/jfs/inode.c:132
write_inode fs/fs-writeback.c:1503 [inline]
__writeback_single_inode+0x711/0x10d0 fs/fs-writeback.c:1723
writeback_sb_inodes+0x80c/0x1370 fs/fs-writeback.c:1954
__writeback_inodes_wb+0x11b/0x260 fs/fs-writeback.c:2025
wb_writeback+0x42f/0xbd0 fs/fs-writeback.c:2136
wb_check_background_flush fs/fs-writeback.c:2206 [inline]
wb_do_writeback fs/fs-writeback.c:2294 [inline]
wb_workfn+0xc58/0x1090 fs/fs-writeback.c:2321
process_one_work kernel/workqueue.c:3229 [inline]
process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
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
INFO: task syz.2.17:5406 blocked for more than 144 seconds.
Not tainted 6.12.0-rc3-syzkaller-00403-gf9e4825524aa #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.17 state:D stack:27424 pid:5406 tgid:5384 ppid:5225 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5322 [inline]
__schedule+0x1843/0x4ae0 kernel/sched/core.c:6682
__schedule_loop kernel/sched/core.c:6759 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6774
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6831
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_nested+0x1e0/0x220 kernel/locking/rwsem.c:1694
inode_lock_nested include/linux/fs.h:850 [inline]
filename_create+0x260/0x540 fs/namei.c:4026
do_mkdirat+0xbd/0x3a0 fs/namei.c:4272
__do_sys_mkdirat fs/namei.c:4295 [inline]
__se_sys_mkdirat fs/namei.c:4293 [inline]
__x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4293
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: 0033:0x7ff4faf7dff9
RSP: 002b:00007ff4fbe31038 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007ff4fb136058 RCX: 00007ff4faf7dff9
RDX: 0000000000000000 RSI: 0000000020002040 RDI: ffffffffffffff9c
RBP: 00007ff4faff0296 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ff4fb136058 R15: 00007ffc0ec6b068
INFO: task syz.2.17:5407 blocked for more than 145 seconds.
Not tainted 6.12.0-rc3-syzkaller-00403-gf9e4825524aa #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.17 state:D stack:27424 pid:5407 tgid:5384 ppid:5225 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5322 [inline]
__schedule+0x1843/0x4ae0 kernel/sched/core.c:6682
__schedule_loop kernel/sched/core.c:6759 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6774
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6831
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_nested+0x1e0/0x220 kernel/locking/rwsem.c:1694
inode_lock_nested include/linux/fs.h:850 [inline]
filename_create+0x260/0x540 fs/namei.c:4026
do_mkdirat+0xbd/0x3a0 fs/namei.c:4272
__do_sys_mkdirat fs/namei.c:4295 [inline]
__se_sys_mkdirat fs/namei.c:4293 [inline]
__x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4293
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: 0033:0x7ff4faf7c897
RSP: 002b:00007ff4fbe0fe68 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007ff4fbe0fef0 RCX: 00007ff4faf7c897
RDX: 00000000000001ff RSI: 0000000020001040 RDI: 00000000ffffff9c
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020001040
R13: 00007ff4fbe0feb0 R14: 0000000000000000 R15: 0000000000000000
INFO: task syz.2.17:5408 blocked for more than 145 seconds.
Not tainted 6.12.0-rc3-syzkaller-00403-gf9e4825524aa #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.17 state:D stack:27192 pid:5408 tgid:5384 ppid:5225 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5322 [inline]
__schedule+0x1843/0x4ae0 kernel/sched/core.c:6682
__schedule_loop kernel/sched/core.c:6759 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6774
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6831
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:825 [inline]
lookup_slow+0x45/0x70 fs/namei.c:1748
walk_component+0x2e1/0x410 fs/namei.c:2053
lookup_last fs/namei.c:2556 [inline]
path_lookupat+0x16f/0x450 fs/namei.c:2580
filename_lookup+0x256/0x610 fs/namei.c:2609
kern_path+0x35/0x50 fs/namei.c:2717
ovl_mount_dir_noesc fs/overlayfs/params.c:237 [inline]
ovl_mount_dir fs/overlayfs/params.c:268 [inline]
ovl_parse_layer+0x34e/0x1080 fs/overlayfs/params.c:381
ovl_parse_param+0x5b3/0x10b0 fs/overlayfs/params.c:558
vfs_parse_fs_param+0x1a5/0x420 fs/fs_context.c:146
vfs_parse_fs_string fs/fs_context.c:188 [inline]
vfs_parse_monolithic_sep+0x2d9/0x420 fs/fs_context.c:230
do_new_mount+0x28f/0xb40 fs/namespace.c:3503
do_mount fs/namespace.c:3847 [inline]
__do_sys_mount fs/namespace.c:4055 [inline]
__se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4032
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: 0033:0x7ff4faf7dff9
RSP: 002b:00007ff4fbdef038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ff4fb136208 RCX: 00007ff4faf7dff9
RDX: 0000000020000000 RSI: 0000000020000040 RDI: 0000000000000000
RBP: 00007ff4faff0296 R08: 0000000020000140 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007ff4fb136208 R15: 00007ffc0ec6b068
INFO: task syz.2.17:5413 blocked for more than 145 seconds.
Not tainted 6.12.0-rc3-syzkaller-00403-gf9e4825524aa #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.17 state:D stack:23520 pid:5413 tgid:5384 ppid:5225 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5322 [inline]
__schedule+0x1843/0x4ae0 kernel/sched/core.c:6682
__schedule_loop kernel/sched/core.c:6759 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6774
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6831
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_nested+0x1e0/0x220 kernel/locking/rwsem.c:1694
inode_lock_nested include/linux/fs.h:850 [inline]
filename_create+0x260/0x540 fs/namei.c:4026
do_mkdirat+0xbd/0x3a0 fs/namei.c:4272
__do_sys_mkdir fs/namei.c:4300 [inline]
__se_sys_mkdir fs/namei.c:4298 [inline]
__x64_sys_mkdir+0x6c/0x80 fs/namei.c:4298
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: 0033:0x7ff4faf7dff9
RSP: 002b:00007ff4fbdce038 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007ff4fb1362e0 RCX: 00007ff4faf7dff9
RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000020000340
RBP: 00007ff4faff0296 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ff4fb1362e0 R15: 00007ffc0ec6b068
Showing all locks held in the system:
2 locks held by kworker/u8:0/11:
#0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
#0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
#1: ffffc90000107d00 ((reaper_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
#1: ffffc90000107d00 ((reaper_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
1 lock held by khungtaskd/30:
#0: ffffffff8e937e20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e937e20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e937e20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6720
4 locks held by kworker/u8:4/63:
#0: ffff8880206ce148 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
#0: ffff8880206ce148 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
#1: ffffc900015d7d00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
#1: ffffc900015d7d00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
#2: ffff88803266a0e0 (&type->s_umount_key#67){++++}-{3:3}, at: super_trylock_shared+0x22/0xf0 fs/super.c:562
#3: ffff88807cebafe0 (&jfs_ip->commit_mutex){+.+.}-{3:3}, at: jfs_commit_inode+0x24a/0x590 fs/jfs/inode.c:102
2 locks held by kworker/u8:8/2942:
2 locks held by getty/4986:
#0: ffff88814b7330a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
4 locks held by syz.2.17/5385:
2 locks held by syz.2.17/5406:
#0: ffff88803266a420 (sb_writers#19){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:515
#1: ffff88807cebb390 (&type->i_mutex_dir_key#10/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:850 [inline]
#1: ffff88807cebb390 (&type->i_mutex_dir_key#10/1){+.+.}-{3:3}, at: filename_create+0x260/0x540 fs/namei.c:4026
2 locks held by syz.2.17/5407:
#0: ffff88803266a420 (sb_writers#19){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:515
#1: ffff88807cebb390 (&type->i_mutex_dir_key#10/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:850 [inline]
#1: ffff88807cebb390 (&type->i_mutex_dir_key#10/1){+.+.}-{3:3}, at: filename_create+0x260/0x540 fs/namei.c:4026
1 lock held by syz.2.17/5408:
#0: ffff88807cebb390 (&type->i_mutex_dir_key#10){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:825 [inline]
#0: ffff88807cebb390 (&type->i_mutex_dir_key#10){++++}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1748
2 locks held by syz.2.17/5413:
#0: ffff88803266a420 (sb_writers#19){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:515
#1: ffff88807cebb390 (&type->i_mutex_dir_key#10/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:850 [inline]
#1: ffff88807cebb390 (&type->i_mutex_dir_key#10/1){+.+.}-{3:3}, at: filename_create+0x260/0x540 fs/namei.c:4026
2 locks held by syz.3.50/5733:
#0: ffff88803266a0e0 (&type->s_umount_key#67){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88803266a0e0 (&type->s_umount_key#67){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
#1: ffff888142b5e7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:388 [inline]
#1: ffff888142b5e7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x26e/0xb50 fs/fs-writeback.c:2797
2 locks held by syz.3.106/6153:
#0: ffff88803266a0e0 (&type->s_umount_key#67){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88803266a0e0 (&type->s_umount_key#67){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
#1: ffff888142b5e7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:388 [inline]
#1: ffff888142b5e7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x26e/0xb50 fs/fs-writeback.c:2797
2 locks held by syz.4.137/6551:
#0: ffff88803266a0e0 (&type->s_umount_key#67){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88803266a0e0 (&type->s_umount_key#67){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
#1: ffff888142b5e7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:388 [inline]
#1: ffff888142b5e7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x26e/0xb50 fs/fs-writeback.c:2797
3 locks held by syz-executor/6638:
#0: ffff888033b6e0e0 (&type->s_umount_key#95){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff888033b6e0e0 (&type->s_umount_key#95){+.+.}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff888033b6e0e0 (&type->s_umount_key#95){+.+.}-{3:3}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
#1: ffffffff8eec2848 (uuid_mutex){+.+.}-{3:3}, at: btrfs_close_devices+0xc0/0x5c0 fs/btrfs/volumes.c:1160
#2: ffffffff8e9f9028 (lock#3){+.+.}-{3:3}, at: __lru_add_drain_all+0x66/0x560 mm/swap.c:843
3 locks held by syz.1.257/7247:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc3-syzkaller-00403-gf9e4825524aa #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
CPU: 1 UID: 0 PID: 2942 Comm: kworker/u8:8 Not tainted 6.12.0-rc3-syzkaller-00403-gf9e4825524aa #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: bat_events batadv_nc_worker
RIP: 0010:separate_irq_context kernel/locking/lockdep.c:4675 [inline]
RIP: 0010:__lock_acquire+0xd70/0x2050 kernel/locking/lockdep.c:5186
Code: 41 8b 5d 00 48 85 db 74 58 83 fb 31 0f 83 2e 11 00 00 48 8d 04 9b 48 8b 0c 24 48 8d 5c c1 f8 48 89 d8 48 c1 e8 03 0f b6 04 38 <84> c0 0f 85 6b 0d 00 00 8b 1b 48 8b 44 24 20 0f b6 04 38 84 c0 0f
RSP: 0018:ffffc9000a4578f0 EFLAGS: 00000802
RAX: 0000000000000000 RBX: ffff88802f5b2928 RCX: ffff88802f5b28e0
RDX: 0000000000000000 RSI: 0000000000000008 RDI: dffffc0000000000
RBP: ffff88802f5b2930 R08: ffffffff94293807 R09: 1ffffffff2852700
R10: dffffc0000000000 R11: fffffbfff2852701 R12: 0000000000000000
R13: ffff88802f5b28d8 R14: 740f18be4ec77703 R15: ffff88802f5b2950
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa0345ff000 CR3: 000000000e734000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825
rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
rcu_read_lock include/linux/rcupdate.h:849 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
batadv_nc_worker+0xec/0x610 net/batman-adv/network-coding.c:719
process_one_work kernel/workqueue.c:3229 [inline]
process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
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