INFO: task syz-executor.5:19188 blocked for more than 143 seconds.
Not tainted 6.0.0-syzkaller-09039-ga6afa4199d3d #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:23512 pid:19188 ppid: 3629 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5183 [inline]
__schedule+0x957/0xe20 kernel/sched/core.c:6495
schedule+0xcb/0x190 kernel/sched/core.c:6571
wb_wait_for_completion+0x165/0x290 fs/fs-writeback.c:191
__writeback_inodes_sb_nr+0x2f0/0x3d0 fs/fs-writeback.c:2620
try_to_writeback_inodes_sb+0xa5/0xd0 fs/fs-writeback.c:2668
ext4_nonda_switch fs/ext4/inode.c:2950 [inline]
ext4_da_write_begin+0x243/0x760 fs/ext4/inode.c:2977
generic_perform_write+0x314/0x610 mm/filemap.c:3745
ext4_buffered_write_iter+0x122/0x3a0 fs/ext4/file.c:285
ext4_file_write_iter+0x1d0/0x18e0
__kernel_write_iter+0x323/0x770 fs/read_write.c:517
dump_emit_page fs/coredump.c:858 [inline]
dump_user_range+0x9f0/0xe80 fs/coredump.c:909
elf_core_dump+0x3d5b/0x4570 fs/binfmt_elf.c:2311
do_coredump+0x18fa/0x2980 fs/coredump.c:756
get_signal+0x1430/0x1780 kernel/signal.c:2843
arch_do_signal_or_restart+0x8d/0x750 arch/x86/kernel/signal.c:869
exit_to_user_mode_loop+0x74/0x160 kernel/entry/common.c:166
exit_to_user_mode_prepare+0xad/0x110 kernel/entry/common.c:201
irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:307
exc_page_fault+0xa2/0x120 arch/x86/mm/fault.c:1557
asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x0
RSP: 002b:00000000200000c8 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f7f0b3abf80 RCX: 00007f7f0b28a5a9
RDX: 0000000020000100 RSI: 00000000200000c0 RDI: 0000000040000200
RBP: 00007f7f0b2e5580 R08: 0000000020000180 R09: 0000000020000180
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007ffc2a92966f R14: 00007f7f0c373300 R15: 0000000000022000
INFO: lockdep is turned off.
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.0.0-syzkaller-09039-ga6afa4199d3d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
nmi_cpu_backtrace+0x47c/0x4b0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x169/0x280 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
watchdog+0xcd5/0xd20 kernel/hung_task.c:369
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 19560 Comm: syz-executor.3 Not tainted 6.0.0-syzkaller-09039-ga6afa4199d3d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
RIP: 0010:__mod_node_page_state+0xbf/0xe0 mm/vmstat.c:404
Code: 4c cb 48 39 c1 7f 1d 48 c7 c7 a0 7f b8 8a e8 d8 87 79 08 65 42 88 5c 35 01 5b 41 5c 41 5d 41 5e 41 5f 5d c3 48 89 df 4c 89 fe <44> 89 e2 e8 19 00 00 00 31 db eb d1 0f 0b eb 8d 48 c7 c7 a0 26 dd
RSP: 0018:ffffc9000a68efe8 EFLAGS: 00000002
RAX: 0000000000000018 RBX: 0000000000000019 RCX: 0000000000000019
RDX: 0000000000000001 RSI: ffff88823fff7000 RDI: 0000000000000019
RBP: 00000000000407ac R08: dffffc0000000000 R09: fffff94000b17089
R10: fffff94000b17089 R11: 1ffffd4000b17088 R12: 0000000000000015
R13: 0000000000000001 R14: 0000000000000015 R15: ffff88823fff7000
FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7fc68dbab0 CR3: 000000007c4da000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__mod_lruvec_state mm/memcontrol.c:756 [inline]
__mod_lruvec_page_state+0x186/0x320 mm/memcontrol.c:781
mod_lruvec_page_state include/linux/vmstat.h:568 [inline]
lruvec_stat_mod_folio include/linux/vmstat.h:645 [inline]
__folio_start_writeback+0x8cd/0xf90 mm/page-writeback.c:3005
ext4_bio_write_page+0x312/0x1dd0 fs/ext4/page-io.c:451
mpage_submit_page fs/ext4/inode.c:2121 [inline]
mpage_map_and_submit_buffers fs/ext4/inode.c:2366 [inline]
mpage_map_and_submit_extent fs/ext4/inode.c:2505 [inline]
ext4_writepages+0x23ea/0x3be0 fs/ext4/inode.c:2834
do_writepages+0x3c3/0x690 mm/page-writeback.c:2469
filemap_fdatawrite_wbc+0x11e/0x170 mm/filemap.c:388
__filemap_fdatawrite_range mm/filemap.c:421 [inline]
__filemap_fdatawrite mm/filemap.c:427 [inline]
filemap_flush+0x15d/0x1e0 mm/filemap.c:454
ext4_release_file+0x7e/0x300 fs/ext4/file.c:158
__fput+0x3ba/0x880 fs/file_table.c:320
task_work_run+0x146/0x1c0 kernel/task_work.c:177
exit_task_work include/linux/task_work.h:38 [inline]
do_exit+0x55e/0x20a0 kernel/exit.c:795
do_group_exit+0x23b/0x2f0 kernel/exit.c:925
get_signal+0x172f/0x1780 kernel/signal.c:2857
arch_do_signal_or_restart+0x8d/0x750 arch/x86/kernel/signal.c:869
exit_to_user_mode_loop+0x74/0x160 kernel/entry/common.c:166
exit_to_user_mode_prepare+0xad/0x110 kernel/entry/common.c:201
irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:307
exc_page_fault+0xa2/0x120 arch/x86/mm/fault.c:1557
asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 002b:00000000200000c8 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f56811abf80 RCX: 00007f568108a5a9
RDX: 0000000020000100 RSI: 00000000200000c0 RDI: 0000000040000200
RBP: 00007f56810e5580 R08: 0000000020000180 R09: 0000000020000180
R10: 0000000020000140 R11: 0000000000000206 R12: 0000000000000000
R13: 00007fff474f9c4f R14: 00007f5682202300 R15: 0000000000022000