INFO: task syz-executor.1:10307 blocked for more than 143 seconds.
Not tainted 6.4.0-rc1-syzkaller-00197-g838a854820ee #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:26104 pid:10307 ppid:5023 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5343 [inline]
__schedule+0x187b/0x4900 kernel/sched/core.c:6669
schedule+0xc3/0x180 kernel/sched/core.c:6745
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6804
rwsem_down_write_slowpath+0xedd/0x13a0 kernel/locking/rwsem.c:1178
__down_write_common+0x1aa/0x200 kernel/locking/rwsem.c:1306
inode_lock_nested include/linux/fs.h:810 [inline]
ext4_rename fs/ext4/namei.c:3842 [inline]
ext4_rename2+0x106b/0x4400 fs/ext4/namei.c:4221
vfs_rename+0xb1b/0xfa0 fs/namei.c:4849
do_renameat2+0xd78/0x1660 fs/namei.c:5002
__do_sys_rename fs/namei.c:5048 [inline]
__se_sys_rename fs/namei.c:5046 [inline]
__x64_sys_rename+0x86/0x90 fs/namei.c:5046
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f2f2248c169
RSP: 002b:00007f2f23228168 EFLAGS: 00000246 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 00007f2f225ac050 RCX: 00007f2f2248c169
RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000020000200
RBP: 00007f2f224e7ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc75f3fbff R14: 00007f2f23228300 R15: 0000000000022000
INFO: task syz-executor.1:10310 blocked for more than 143 seconds.
Not tainted 6.4.0-rc1-syzkaller-00197-g838a854820ee #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:28008 pid:10310 ppid:5023 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5343 [inline]
__schedule+0x187b/0x4900 kernel/sched/core.c:6669
schedule+0xc3/0x180 kernel/sched/core.c:6745
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6804
rwsem_down_write_slowpath+0xedd/0x13a0 kernel/locking/rwsem.c:1178
__down_write_common+0x1aa/0x200 kernel/locking/rwsem.c:1306
inode_lock_nested include/linux/fs.h:810 [inline]
lock_two_directories+0x116/0x120 fs/namei.c:3032
lock_rename fs/namei.c:3047 [inline]
do_renameat2+0x5d3/0x1660 fs/namei.c:4941
__do_sys_renameat2 fs/namei.c:5035 [inline]
__se_sys_renameat2 fs/namei.c:5032 [inline]
__x64_sys_renameat2+0xd2/0xe0 fs/namei.c:5032
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f2f2248c169
RSP: 002b:00007f2f23207168 EFLAGS: 00000246 ORIG_RAX: 000000000000013c
RAX: ffffffffffffffda RBX: 00007f2f225ac120 RCX: 00007f2f2248c169
RDX: 0000000000000004 RSI: 00000000200002c0 RDI: 0000000000000004
RBP: 00007f2f224e7ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000020000180 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc75f3fbff R14: 00007f2f23207300 R15: 0000000000022000
INFO: task syz-executor.5:10329 blocked for more than 143 seconds.
Not tainted 6.4.0-rc1-syzkaller-00197-g838a854820ee #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:25496 pid:10329 ppid:5034 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5343 [inline]
__schedule+0x187b/0x4900 kernel/sched/core.c:6669
schedule+0xc3/0x180 kernel/sched/core.c:6745
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6804
__mutex_lock_common+0xe33/0x2530 kernel/locking/mutex.c:679
__mutex_lock kernel/locking/mutex.c:747 [inline]
mutex_lock_nested+0x1b/0x20 kernel/locking/mutex.c:799
lock_rename+0x52/0xa0 fs/namei.c:3046
ovl_workdir_ok fs/overlayfs/super.c:981 [inline]
ovl_get_workdir+0x211/0x17c0 fs/overlayfs/super.c:1416
ovl_fill_super+0x1c64/0x2bd0 fs/overlayfs/super.c:1992
mount_nodev+0x56/0xe0 fs/super.c:1426
legacy_get_tree+0xef/0x190 fs/fs_context.c:610
vfs_get_tree+0x8c/0x270 fs/super.c:1510
do_new_mount+0x28f/0xae0 fs/namespace.c:3039
do_mount fs/namespace.c:3382 [inline]
__do_sys_mount fs/namespace.c:3591 [inline]
__se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3568
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f25f588c169
RSP: 002b:00007f25f64ff168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f25f59abf80 RCX: 00007f25f588c169
RDX: 00000000200002c0 RSI: 0000000020000040 RDI: 0000000000000000
RBP: 00007f25f58e7ca1 R08: 0000000020000080 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff4025eacf R14: 00007f25f64ff300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/13:
#0: ffffffff8cf27670 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:518
1 lock held by rcu_tasks_trace/14:
#0: ffffffff8cf27a30 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:518
1 lock held by khungtaskd/28:
#0: ffffffff8cf274a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
5 locks held by kworker/u4:6/2839:
2 locks held by getty/4747:
#0: ffff888028bfe098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900015802f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ab/0x1db0 drivers/tty/n_tty.c:2176
2 locks held by syz-fuzzer/5017:
#0: ffff88807b10b768 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x254/0x2f0 fs/file.c:1047
#1: ffff8880833a8400 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: iterate_dir+0x10e/0x570 fs/readdir.c:55
4 locks held by syz-executor.1/10307:
#0: ffff88814bc9c460 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:394
#1: ffff8880833a8400 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:810 [inline]
#1: ffff8880833a8400 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: lock_rename fs/namei.c:3042 [inline]
#1: ffff8880833a8400 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: do_renameat2+0x615/0x1660 fs/namei.c:4941
#2: ffff888074dd2c00 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: inode_lock include/linux/fs.h:775 [inline]
#2: ffff888074dd2c00 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: vfs_rename+0x617/0xfa0 fs/namei.c:4821
#3: ffff8880830d9800 (&type->i_mutex_dir_key#3/4){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:810 [inline]
#3: ffff8880830d9800 (&type->i_mutex_dir_key#3/4){+.+.}-{3:3}, at: ext4_rename fs/ext4/namei.c:3842 [inline]
#3: ffff8880830d9800 (&type->i_mutex_dir_key#3/4){+.+.}-{3:3}, at: ext4_rename2+0x106b/0x4400 fs/ext4/namei.c:4221
4 locks held by syz-executor.1/10310:
#0: ffff88814bc9c460 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:394
#1: ffff88814bc9c748 (&type->s_vfs_rename_key){+.+.}-{3:3}, at: lock_rename fs/namei.c:3046 [inline]
#1: ffff88814bc9c748 (&type->s_vfs_rename_key){+.+.}-{3:3}, at: do_renameat2+0x5c8/0x1660 fs/namei.c:4941
#2: ffff8880830d9800 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: lock_two_directories+0xc3/0x120
#3: ffff888074dd2c00 (&type->i_mutex_dir_key#3/5){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:810 [inline]
#3: ffff888074dd2c00 (&type->i_mutex_dir_key#3/5){+.+.}-{3:3}, at: lock_two_directories+0x116/0x120 fs/namei.c:3032
2 locks held by syz-executor.5/10329:
#0: ffff88803f4da0e0 (&type->s_umount_key#56/1){+.+.}-{3:3}, at: alloc_super+0x217/0x930 fs/super.c:228
#1: ffff88814bc9c748 (&type->s_vfs_rename_key){+.+.}-{3:3}, at: lock_rename+0x52/0xa0 fs/namei.c:3046
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.4.0-rc1-syzkaller-00197-g838a854820ee #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x498/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x187/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xec2/0xf00 kernel/hung_task.c:379
kthread+0x2b8/0x350 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 2839 Comm: kworker/u4:6 Not tainted 6.4.0-rc1-syzkaller-00197-g838a854820ee #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023
Workqueue: bat_events batadv_nc_worker
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x0/0x90 kernel/kcov.c:305
Code: 89 11 48 c7 44 0a 08 03 00 00 00 48 89 44 0a 10 48 89 74 0a 18 4c 89 44 0a 20 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 0f 1e fa 4c 8b 04 24 65 48 8b 15 60 37 78 7e 65 8b 05 61 37 78
RSP: 0018:ffffc9000be67b88 EFLAGS: 00000246
RAX: 0000000000000001 RBX: ffff88807de9d160 RCX: ffff888029bf5940
RDX: dffffc0000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: dffffc0000000000 R09: fffffbfff206504d
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88807ddc9798
R13: ffff88807ddc8c80 R14: ffff888028d3bb90 R15: ffffffff8a7f7160
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c010f82000 CR3: 000000000cd30000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rcu_read_lock include/linux/rcupdate.h:774 [inline]
batadv_nc_process_nc_paths+0xc8/0x350 net/batman-adv/network-coding.c:687
batadv_nc_worker+0x4d3/0x5c0 net/batman-adv/network-coding.c:735
process_one_work+0x8a0/0x10e0 kernel/workqueue.c:2405
worker_thread+0xa63/0x1210 kernel/workqueue.c:2552
kthread+0x2b8/0x350 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308