INFO: task syz-executor.1:14912 blocked for more than 143 seconds.
Not tainted 6.9.0-rc4-syzkaller-00266-g977b1ef51866 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:29968 pid:14912 tgid:14906 ppid:13249 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6746
__schedule_loop kernel/sched/core.c:6823 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6838
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6895
rwsem_down_write_slowpath kernel/locking/rwsem.c:1178 [inline]
__down_write_common+0x950/0x13f0 kernel/locking/rwsem.c:1306
inode_lock_nested include/linux/fs.h:830 [inline]
do_rmdir+0x235/0x410 fs/namei.c:4253
__do_sys_rmdir fs/namei.c:4284 [inline]
__se_sys_rmdir fs/namei.c:4282 [inline]
__x64_sys_rmdir+0xc7/0x110 fs/namei.c:4282
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f08a287dea9
RSP: 002b:00007f08a360b0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000054
RAX: ffffffffffffffda RBX: 00007f08a29ac050 RCX: 00007f08a287dea9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000080
RBP: 00007f08a28ca4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f08a29ac050 R15: 00007ffe629ab0f8
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
#0: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
#0: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614
3 locks held by kworker/u8:3/45:
2 locks held by getty/4825:
#0: ffff88802acbe0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2201
3 locks held by syz-executor.3/8817:
2 locks held by syz-executor.1/14909:
2 locks held by syz-executor.1/14912:
#0: ffff888054bee420 (sb_writers#33){.+.+}-{0:0}, at: do_rmdir+0x1e4/0x410 fs/namei.c:4249
#1: ffff88805c0aebc8 (&type->i_mutex_dir_key#25/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:830 [inline]
#1: ffff88805c0aebc8 (&type->i_mutex_dir_key#25/1){+.+.}-{3:3}, at: do_rmdir+0x235/0x410 fs/namei.c:4253
1 lock held by syz-executor.4/15394:
#0: ffff88802f4ce420 (sb_writers#5){.+.+}-{0:0}, at: get_signal+0x232c/0x2710 kernel/signal.c:2896
4 locks held by syz-executor.0/16462:
4 locks held by syz-executor.2/16473:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.9.0-rc4-syzkaller-00266-g977b1ef51866 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xf86/0x1240 kernel/hung_task.c:380
kthread+0x2c1/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 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 PID: 16462 Comm: syz-executor.0 Not tainted 6.9.0-rc4-syzkaller-00266-g977b1ef51866 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:arch_atomic64_read arch/x86/include/asm/atomic64_64.h:15 [inline]
RIP: 0010:raw_atomic64_read include/linux/atomic/atomic-arch-fallback.h:2583 [inline]
RIP: 0010:raw_atomic_long_read include/linux/atomic/atomic-long.h:38 [inline]
RIP: 0010:atomic_long_read include/linux/atomic/atomic-instrumented.h:3189 [inline]
RIP: 0010:rwsem_is_locked include/linux/rwsem.h:75 [inline]
RIP: 0010:mmap_assert_locked include/linux/mmap_lock.h:66 [inline]
RIP: 0010:find_vma+0xd4/0x1b0 mm/mmap.c:1892
Code: e8 c1 db b8 ff 4c 8d a3 30 01 00 00 be 08 00 00 00 4c 89 e7 e8 0d 0c 14 00 4c 89 e2 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 c0 00 00 00 4c 8b a3 30 01 00 00 31 ff 4c 89 e6
RSP: 0018:ffffc90003767800 EFLAGS: 00000a02
RAX: dffffc0000000000 RBX: ffff88802c7eaf80 RCX: ffffffff81d4e6a3
RDX: 1ffff110058fd616 RSI: 0000000000000008 RDI: ffff88802c7eb0b0
RBP: 1ffff920006ecf00 R08: 0000000000000000 R09: ffffed10058fd616
R10: ffff88802c7eb0b7 R11: 0000000000000003 R12: ffff88802c7eb0b0
R13: dffffc0000000000 R14: ffff88802c7eb0b0 R15: ffff88802c7eaf80
FS: 00007f73764926c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002035c000 CR3: 000000004e838000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_mm_and_find_vma+0x62/0x580 mm/memory.c:5696
do_user_addr_fault+0x29c/0x1080 arch/x86/mm/fault.c:1385
handle_page_fault arch/x86/mm/fault.c:1505 [inline]
exc_page_fault+0x5c/0xc0 arch/x86/mm/fault.c:1563
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0010:fault_in_readable+0x106/0x200 mm/gup.c:2009
Code: ff 0f 00 00 31 c0 4c 89 eb 48 81 e5 00 f0 ff ff 4c 39 ed 48 0f 42 e8 e8 78 21 be ff 48 39 dd 0f 84 e4 00 00 00 e8 6a 21 be ff <44> 8a 3b e8 62 21 be ff 48 81 c3 00 10 00 00 44 88 7c 24 20 48 39
RSP: 0018:ffffc900037679e8 EFLAGS: 00050246
RAX: 0000000000040000 RBX: 000000002035c000 RCX: ffffc90019c08000
RDX: 0000000000040000 RSI: ffffffff81cfa0e6 RDI: 0000000000000007
RBP: 000000002035d000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000001000
R13: 000000002035c000 R14: 1ffff920006ecf3d R15: 0000000000000000
fault_in_iov_iter_readable+0x101/0x2c0 lib/iov_iter.c:94
generic_perform_write+0x1cc/0x620 mm/filemap.c:3964
ext4_buffered_write_iter+0x11f/0x3d0 fs/ext4/file.c:299
ext4_file_write_iter+0x874/0x1a40 fs/ext4/file.c:698
call_write_iter include/linux/fs.h:2110 [inline]
new_sync_write fs/read_write.c:497 [inline]
vfs_write+0x6db/0x1100 fs/read_write.c:590
ksys_write+0x12f/0x260 fs/read_write.c:643
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f737567dea9
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:00007f73764920c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f73757abf80 RCX: 00007f737567dea9
RDX: 00000000ffffff6a RSI: 0000000020000000 RDI: 000000000000000a
RBP: 00007f73756ca4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f73757abf80 R15: 00007ffe363fe578