INFO: task syz-executor.1:8292 blocked for more than 143 seconds.
Not tainted 6.7.0-rc8-syzkaller-00024-gac865f00af29 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:26744 pid:8292 tgid:8290 ppid:5094 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0x1961/0x4ab0 kernel/sched/core.c:6688
__schedule_loop kernel/sched/core.c:6763 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6778
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6835
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x6a3/0xd60 kernel/locking/mutex.c:747
exfat_lookup+0x133/0x1830 fs/exfat/namei.c:724
__lookup_slow+0x282/0x3e0 fs/namei.c:1694
lookup_slow+0x53/0x70 fs/namei.c:1711
walk_component+0x2d0/0x400 fs/namei.c:2002
lookup_last fs/namei.c:2459 [inline]
path_lookupat+0x16f/0x450 fs/namei.c:2483
filename_lookup+0x255/0x610 fs/namei.c:2512
user_path_at_empty+0x42/0x60 fs/namei.c:2911
user_path_at include/linux/namei.h:57 [inline]
__do_sys_chdir fs/open.c:551 [inline]
__se_sys_chdir+0xbf/0x220 fs/open.c:545
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x45/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fa40e07cce9
RSP: 002b:00007fa40ee210c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000050
RAX: ffffffffffffffda RBX: 00007fa40e19c050 RCX: 00007fa40e07cce9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000040
RBP: 00007fa40e0c947a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fa40e19c050 R15: 00007fffa9282728
INFO: task syz-executor.1:8294 blocked for more than 143 seconds.
Not tainted 6.7.0-rc8-syzkaller-00024-gac865f00af29 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:27376 pid:8294 tgid:8290 ppid:5094 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0x1961/0x4ab0 kernel/sched/core.c:6688
__schedule_loop kernel/sched/core.c:6763 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6778
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6835
rwsem_down_write_slowpath+0xeea/0x13b0 kernel/locking/rwsem.c:1178
__down_write_common+0x1aa/0x200 kernel/locking/rwsem.c:1306
inode_lock_nested include/linux/fs.h:837 [inline]
do_unlinkat+0x26a/0x830 fs/namei.c:4369
__do_sys_unlink fs/namei.c:4430 [inline]
__se_sys_unlink fs/namei.c:4428 [inline]
__x64_sys_unlink+0x49/0x50 fs/namei.c:4428
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x45/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fa40e07cce9
RSP: 002b:00007fa40ee000c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 00007fa40e19c120 RCX: 00007fa40e07cce9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200001c0
RBP: 00007fa40e0c947a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fa40e19c120 R15: 00007fffa9282728
INFO: task syz-executor.1:8295 blocked for more than 144 seconds.
Not tainted 6.7.0-rc8-syzkaller-00024-gac865f00af29 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:27088 pid:8295 tgid:8290 ppid:5094 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0x1961/0x4ab0 kernel/sched/core.c:6688
__schedule_loop kernel/sched/core.c:6763 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6778
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6835
rwsem_down_write_slowpath+0xeea/0x13b0 kernel/locking/rwsem.c:1178
__down_write_common+0x1aa/0x200 kernel/locking/rwsem.c:1306
inode_lock include/linux/fs.h:802 [inline]
open_last_lookups fs/namei.c:3543 [inline]
path_openat+0x7bc/0x3290 fs/namei.c:3776
do_filp_open+0x234/0x490 fs/namei.c:3809
do_sys_openat2+0x13e/0x1d0 fs/open.c:1437
do_sys_open fs/open.c:1452 [inline]
__do_sys_creat fs/open.c:1528 [inline]
__se_sys_creat fs/open.c:1522 [inline]
__x64_sys_creat+0x123/0x160 fs/open.c:1522
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x45/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fa40e07cce9
RSP: 002b:00007fa40eddf0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 00007fa40e19c1f0 RCX: 00007fa40e07cce9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000080
RBP: 00007fa40e0c947a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fa40e19c1f0 R15: 00007fffa9282728
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8d92dae0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
#0: ffffffff8d92dae0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
#0: ffffffff8d92dae0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
3 locks held by kworker/u4:7/2457:
4 locks held by kworker/u4:11/2868:
#0: ffff888018e59d38 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2602 [inline]
#0: ffff888018e59d38 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2700
#1: ffffc9000ae4fd20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2602 [inline]
#1: ffffc9000ae4fd20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2700
#2: ffff88802932a0e0 (&type->s_umount_key#102){++++}-{3:3}, at: super_trylock_shared+0x22/0xf0 fs/super.c:610
#3: ffff8880293280e0 (&sbi->s_lock#2){+.+.}-{3:3}, at: exfat_write_inode+0x69/0x120 fs/exfat/inode.c:96
2 locks held by getty/4817:
#0: ffff88814aff20a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b4/0x1e10 drivers/tty/n_tty.c:2201
3 locks held by syz-executor.1/8291:
2 locks held by syz-executor.1/8292:
#0: ffff8880858c82b0 (&sb->s_type->i_mutex_key#35){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:812 [inline]
#0: ffff8880858c82b0 (&sb->s_type->i_mutex_key#35){++++}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1710
#1: ffff8880293280e0 (&sbi->s_lock#2){+.+.}-{3:3}, at: exfat_lookup+0x133/0x1830 fs/exfat/namei.c:724
2 locks held by syz-executor.1/8294:
#0: ffff88802932a418 (sb_writers#29){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:404
#1: ffff8880858c82b0 (&sb->s_type->i_mutex_key#34/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:837 [inline]
#1: ffff8880858c82b0 (&sb->s_type->i_mutex_key#34/1){+.+.}-{3:3}, at: do_unlinkat+0x26a/0x830 fs/namei.c:4369
2 locks held by syz-executor.1/8295:
#0: ffff88802932a418 (sb_writers#29){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:404
#1: ffff8880858c82b0 (&sb->s_type->i_mutex_key#35){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline]
#1: ffff8880858c82b0 (&sb->s_type->i_mutex_key#35){++++}-{3:3}, at: open_last_lookups fs/namei.c:3543 [inline]
#1: ffff8880858c82b0 (&sb->s_type->i_mutex_key#35){++++}-{3:3}, at: path_openat+0x7bc/0x3290 fs/namei.c:3776
1 lock held by syz-executor.1/8989:
#0: ffff88802932a0e0 (&type->s_umount_key#102){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88802932a0e0 (&type->s_umount_key#102){++++}-{3:3}, at: super_lock+0x129/0x3a0 fs/super.c:117
1 lock held by syz-executor.1/9114:
#0: ffff88802932a0e0 (&type->s_umount_key#102){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88802932a0e0 (&type->s_umount_key#102){++++}-{3:3}, at: super_lock+0x129/0x3a0 fs/super.c:117
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.7.0-rc8-syzkaller-00024-gac865f00af29 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
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+0x198/0x310 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xfaf/0xff0 kernel/hung_task.c:379
kthread+0x2d3/0x370 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 8291 Comm: syz-executor.1 Not tainted 6.7.0-rc8-syzkaller-00024-gac865f00af29 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:check_kcov_mode kernel/kcov.c:184 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x36/0x60 kernel/kcov.c:207
Code: 00 3f 75 7e 65 8b 15 01 3f 75 7e f7 c2 00 01 ff 00 74 11 f7 c2 00 01 00 00 74 35 83 b9 fc 15 00 00 00 74 2c 8b 91 d8 15 00 00 <83> fa 02 75 21 48 8b 91 e0 15 00 00 48 8b 32 48 8d 7e 01 8b 89 dc
RSP: 0018:ffffc90019c27ab8 EFLAGS: 00000246
RAX: ffffffff82655be8 RBX: 0000000000000001 RCX: ffff88801fe29dc0
RDX: 0000000000000002 RSI: 0000000000049c37 RDI: 0000000000049c37
RBP: ffffc90019c27bd8 R08: ffffffff82655bd2 R09: 1ffff11010b78d79
R10: dffffc0000000000 R11: ffffed1010b78d7a R12: 0000000000000009
R13: 0000000049c37f49 R14: 0000000000049c37 R15: 0000000000049c37
FS: 00007fa40ee426c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555557272918 CR3: 0000000077a09000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__exfat_free_cluster+0x398/0x990 fs/exfat/fatent.c:192
exfat_free_cluster+0x77/0xd0 fs/exfat/fatent.c:232
__exfat_truncate+0x692/0x9b0 fs/exfat/file.c:187
exfat_evict_inode+0xd8/0x270 fs/exfat/inode.c:625
evict+0x2a4/0x630 fs/inode.c:666
do_unlinkat+0x512/0x830 fs/namei.c:4389
__do_sys_unlink fs/namei.c:4430 [inline]
__se_sys_unlink fs/namei.c:4428 [inline]
__x64_sys_unlink+0x49/0x50 fs/namei.c:4428
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x45/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fa40e07cce9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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:00007fa40ee420c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 00007fa40e19bf80 RCX: 00007fa40e07cce9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000000
RBP: 00007fa40e0c947a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fa40e19bf80 R15: 00007fffa9282728