INFO: task syz-executor.2:2611 blocked for more than 143 seconds.
Not tainted 6.3.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:24520 pid:2611 ppid:5115 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5307 [inline]
__schedule+0x173b/0x4630 kernel/sched/core.c:6625
schedule+0xc3/0x180 kernel/sched/core.c:6701
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6760
rwsem_down_write_slowpath+0xedd/0x13a0 kernel/locking/rwsem.c:1178
__down_write_common+0x1aa/0x200 kernel/locking/rwsem.c:1306
inode_lock include/linux/fs.h:758 [inline]
ext4_buffered_write_iter+0xaf/0x3a0 fs/ext4/file.c:283
ext4_file_write_iter+0x1d6/0x1930
do_iter_write+0x6ea/0xc50 fs/read_write.c:861
iter_file_splice_write+0x843/0xfe0 fs/splice.c:778
do_splice_from fs/splice.c:856 [inline]
direct_splice_actor+0xe7/0x1c0 fs/splice.c:1022
splice_direct_to_actor+0x4c4/0xbd0 fs/splice.c:977
do_splice_direct+0x283/0x3d0 fs/splice.c:1065
do_sendfile+0x620/0xff0 fs/read_write.c:1255
__do_sys_sendfile64 fs/read_write.c:1323 [inline]
__se_sys_sendfile64+0x17c/0x1e0 fs/read_write.c:1309
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: 0033:0x7f8899e8c169
RSP: 002b:00007f889ac94168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f8899fabf80 RCX: 00007f8899e8c169
RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000006
RBP: 00007f8899ee7ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000001ffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff9d9f43ff R14: 00007f889ac94300 R15: 0000000000022000
INFO: task syz-executor.2:2614 blocked for more than 143 seconds.
Not tainted 6.3.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:24704 pid:2614 ppid:5115 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5307 [inline]
__schedule+0x173b/0x4630 kernel/sched/core.c:6625
schedule+0xc3/0x180 kernel/sched/core.c:6701
io_schedule+0x8c/0x100 kernel/sched/core.c:8887
bit_wait_io+0x12/0xc0 kernel/sched/wait_bit.c:209
__wait_on_bit_lock+0xbd/0x1a0 kernel/sched/wait_bit.c:90
out_of_line_wait_on_bit_lock+0x1d4/0x250 kernel/sched/wait_bit.c:117
wait_on_bit_lock_io include/linux/wait_bit.h:208 [inline]
__lock_buffer fs/buffer.c:70 [inline]
lock_buffer include/linux/buffer_head.h:400 [inline]
__sync_dirty_buffer+0x120/0x380 fs/buffer.c:2780
__ext4_handle_dirty_metadata+0x2a6/0x820 fs/ext4/ext4_jbd2.c:387
ext4_convert_inline_data_nolock+0xaba/0xd80 fs/ext4/inline.c:1254
ext4_convert_inline_data+0x4da/0x620 fs/ext4/inline.c:2065
ext4_fallocate+0x14d/0x2050 fs/ext4/extents.c:4701
vfs_fallocate+0x54b/0x6b0 fs/open.c:324
ksys_fallocate fs/open.c:347 [inline]
__do_sys_fallocate fs/open.c:355 [inline]
__se_sys_fallocate fs/open.c:353 [inline]
__x64_sys_fallocate+0xbd/0x100 fs/open.c:353
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: 0033:0x7f8899e8c169
RSP: 002b:00007f889ac73168 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f8899fac050 RCX: 00007f8899e8c169
RDX: 0000000000000000 RSI: 0000000000000011 RDI: 0000000000000007
RBP: 00007f8899ee7ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff9d9f43ff R14: 00007f889ac73300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8cf25570 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:510
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8cf25d70 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:510
1 lock held by khungtaskd/28:
#0: ffffffff8cf253a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/4747:
#0: ffff88802826f098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc900015b02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ab/0x1db0 drivers/tty/n_tty.c:2177
3 locks held by kworker/u4:1/26502:
#0: ffff8881450f4138 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2363
#1: ffffc90014dc7d20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2365
#2: ffff8881401480e0 (&type->s_umount_key#41){.+.+}-{3:3}, at: trylock_super+0x1f/0xf0 fs/super.c:414
2 locks held by syz-executor.2/2611:
#0: ffff88801dda2460 (sb_writers#4){.+.+}-{0:0}, at: do_sendfile+0x5fb/0xff0 fs/read_write.c:1254
#1: ffff88803f55f258 (&sb->s_type->i_mutex_key#7){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff88803f55f258 (&sb->s_type->i_mutex_key#7){++++}-{3:3}, at: ext4_buffered_write_iter+0xaf/0x3a0 fs/ext4/file.c:283
3 locks held by syz-executor.2/2614:
#0: ffff88801dda2460 (sb_writers#4){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2505 [inline]
#0: ffff88801dda2460 (sb_writers#4){.+.+}-{0:0}, at: vfs_fallocate+0x4be/0x6b0 fs/open.c:323
#1: ffff88803f55f258 (&sb->s_type->i_mutex_key#7){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff88803f55f258 (&sb->s_type->i_mutex_key#7){++++}-{3:3}, at: ext4_fallocate+0x145/0x2050 fs/ext4/extents.c:4700
#2: ffff88803f55ef20 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff88803f55ef20 (&ei->xattr_sem){++++}-{3:3}, at: ext4_convert_inline_data+0x3b6/0x620 fs/ext4/inline.c:2063
1 lock held by syz-executor.5/4728:
#0: ffff88801e9084c8 (&disk->open_mutex){+.+.}-{3:3}, at: sync_bdevs+0x1a9/0x320 block/bdev.c:974
1 lock held by syz-executor.5/4729:
#0: ffff88801e9084c8 (&disk->open_mutex){+.+.}-{3:3}, at: sync_bdevs+0x1a9/0x320 block/bdev.c:974
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.3.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
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+0x270/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4411 Comm: syslogd Not tainted 6.3.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:129 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:178 [inline]
RIP: 0010:kasan_check_range+0x52/0x290 mm/kasan/generic.c:187
Code: 81 fd ff ff 01 00 0f 82 47 02 00 00 48 89 fb 48 c1 eb 03 49 b8 00 00 00 00 00 fc ff df 4e 8d 0c 03 4c 8d 54 37 ff 49 c1 ea 03 <49> bb 01 00 00 00 00 fc ff df 4f 8d 34 1a 4c 89 f5 4c 29 cd 48 83
RSP: 0018:ffffc9000310f9e0 EFLAGS: 00000a03
RAX: ffffffff81c46401 RBX: 1ffffd4000400168 RCX: ffffffff81c4643e
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffea0002000b40
RBP: 000000000001ffff R08: dffffc0000000000 R09: fffff94000400168
R10: 1ffffd4000400168 R11: dffffc0000000001 R12: 1ffffd4000400168
R13: ffffea0002000b40 R14: ffffea0002000b48 R15: 0000000000000000
FS: 00007f40155c5800(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056485b4f6de8 CR3: 000000002b7fb000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
instrument_atomic_read include/linux/instrumented.h:72 [inline]
_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
folio_test_swapcache include/linux/page-flags.h:543 [inline]
folio_mapping+0x18e/0x560 mm/util.c:771
folio_mark_dirty+0x1f/0x370 mm/page-writeback.c:2824
shmem_write_end+0x4c1/0xbe0 mm/shmem.c:2596
generic_perform_write+0x3ed/0x5e0 mm/filemap.c:3937
__generic_file_write_iter+0x17a/0x400 mm/filemap.c:4054
generic_file_write_iter+0xaf/0x310 mm/filemap.c:4086
call_write_iter include/linux/fs.h:1851 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x7b2/0xbb0 fs/read_write.c:584
ksys_write+0x1a0/0x2c0 fs/read_write.c:637
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: 0033:0x7f40157519a3
Code: 8b 15 d9 f4 0c 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 64 8b 04 25 18 00 00 00 85 c0 75 14 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 55 c3 0f 1f 40 00 48 83 ec 28 48 89 54 24 18
RSP: 002b:00007ffe3b8d6908 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f40157519a3
RDX: 000000000000004c RSI: 000055fefc7d7c50 RDI: 0000000000000003
RBP: 000055fefc7d7c50 R08: 00007f40157e1040 R09: 00007f40157e10c0
R10: 00007f40157e0fc0 R11: 0000000000000246 R12: 000000000000004c
R13: 00007f40155c5788 R14: 0000000000000004 R15: 000055fefc7d7a60