INFO: task syz-executor.0:5497 blocked for more than 143 seconds.
Not tainted 6.7.0-rc2-syzkaller-00195-g0f5cc96c367f #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:26384 pid:5497 tgid:5495 ppid:5383 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_read_slowpath kernel/locking/rwsem.c:1086 [inline]
__down_read_common kernel/locking/rwsem.c:1250 [inline]
__down_read kernel/locking/rwsem.c:1263 [inline]
down_read+0x703/0xa40 kernel/locking/rwsem.c:1528
__super_lock fs/super.c:58 [inline]
super_lock+0x176/0x3a0 fs/super.c:117
super_lock_shared fs/super.c:146 [inline]
bdev_super_lock_shared+0x1c8/0x330 fs/super.c:1447
fs_bdev_sync+0x15/0x40 fs/super.c:1483
blkdev_flushbuf block/ioctl.c:372 [inline]
blkdev_common_ioctl+0x889/0x2860 block/ioctl.c:505
blkdev_ioctl+0x520/0x730 block/ioctl.c:627
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:871 [inline]
__se_sys_ioctl+0xf8/0x170 fs/ioctl.c:857
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x45/0x110 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f45b2a7cae9
RSP: 002b:00007f45b383a0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f45b2b9bf80 RCX: 00007f45b2a7cae9
RDX: 0000000000000003 RSI: 0000000000001261 RDI: 0000000000000004
RBP: 00007f45b2ac847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f45b2b9bf80 R15: 00007ffc3e9aa988
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8d92d060 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
#0: ffffffff8d92d060 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
#0: ffffffff8d92d060 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6613
2 locks held by kworker/u4:7/1080:
1 lock held by klogd/4501:
2 locks held by getty/4814:
#0: ffff88814b3f80a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900031232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b4/0x1e10 drivers/tty/n_tty.c:2201
2 locks held by syz-executor.0/5241:
1 lock held by syz-executor.0/5497:
#0: ffff8880327260e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff8880327260e0 (&type->s_umount_key#52){++++}-{3:3}, at: super_lock+0x176/0x3a0 fs/super.c:117
1 lock held by syz-executor.0/5655:
#0: ffff8880327260e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff8880327260e0 (&type->s_umount_key#52){++++}-{3:3}, at: super_lock+0x176/0x3a0 fs/super.c:117
1 lock held by syz-executor.0/5781:
#0: ffff8880327260e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff8880327260e0 (&type->s_umount_key#52){++++}-{3:3}, at: super_lock+0x176/0x3a0 fs/super.c:117
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.7.0-rc2-syzkaller-00195-g0f5cc96c367f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5241 Comm: syz-executor.0 Not tainted 6.7.0-rc2-syzkaller-00195-g0f5cc96c367f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
RIP: 0010:addr_has_metadata mm/kasan/kasan.h:305 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:175 [inline]
RIP: 0010:kasan_check_range+0x2b/0x290 mm/kasan/generic.c:187
Code: 0f 1f 00 55 41 57 41 56 41 54 53 b0 01 48 85 f6 0f 84 a0 01 00 00 4c 8d 04 37 49 39 f8 0f 82 52 02 00 00 48 89 fd 48 c1 ed 2f <81> fd fe ff 01 00 0f 86 3f 02 00 00 48 89 fb 48 c1 eb 03 49 ba 00
RSP: 0018:ffffc90004de74a0 EFLAGS: 00000807
RAX: 0000000000000001 RBX: 00000000000000ac RCX: ffffffff816d3109
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff90dd4370
RBP: 000000000001ffff R08: ffffffff90dd4378 R09: 1ffffffff21ba86e
R10: dffffc0000000000 R11: fffffbfff21ba86f R12: 0000000000000001
R13: ffff88801eccbb80 R14: 0000000000000005 R15: ffff88801eccc688
FS: 00007fed12e706c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c000c98000 CR3: 000000007aa4d000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
instrument_atomic_read include/linux/instrumented.h:68 [inline]
_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
hlock_class kernel/locking/lockdep.c:228 [inline]
check_wait_context kernel/locking/lockdep.c:4773 [inline]
__lock_acquire+0x5c9/0x1fd0 kernel/locking/lockdep.c:5086
lock_acquire+0x1e3/0x530 kernel/locking/lockdep.c:5753
fs_reclaim_acquire+0xae/0x120 mm/page_alloc.c:3710
might_alloc include/linux/sched/mm.h:303 [inline]
bdev_getblk+0x46/0x6d0 fs/buffer.c:1425
__bread_gfp+0xaf/0x430 fs/buffer.c:1474
sb_bread include/linux/buffer_head.h:324 [inline]
exfat_get_dentry+0x53b/0x730 fs/exfat/dir.c:770
exfat_create_upcase_table+0x259/0xfa0 fs/exfat/nls.c:764
__exfat_fill_super fs/exfat/super.c:594 [inline]
exfat_fill_super+0x119e/0x2a00 fs/exfat/super.c:646
get_tree_bdev+0x416/0x5b0 fs/super.c:1598
vfs_get_tree+0x8c/0x2a0 fs/super.c:1771
do_new_mount+0x28f/0xae0 fs/namespace.c:3337
do_mount fs/namespace.c:3677 [inline]
__do_sys_mount fs/namespace.c:3886 [inline]
__se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3863
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x45/0x110 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fed1207e1ea
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 09 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007fed12e6fee8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fed12e6ff80 RCX: 00007fed1207e1ea
RDX: 0000000020001500 RSI: 0000000020000140 RDI: 00007fed12e6ff40
RBP: 0000000020001500 R08: 00007fed12e6ff80 R09: 0000000000000800
R10: 0000000000000800 R11: 0000000000000202 R12: 0000000020000140
R13: 00007fed12e6ff40 R14: 00000000000014fe R15: 0000000020004800