INFO: task syz-executor.2:5776 blocked for more than 143 seconds.
      Not tainted 5.15.169-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2  state:D stack:    0 pid: 5776 ppid:  5379 flags:0x0000000d
Call trace:
 __switch_to+0x308/0x5e8 arch/arm64/kernel/process.c:518
 context_switch kernel/sched/core.c:5027 [inline]
 __schedule+0xf10/0x1e48 kernel/sched/core.c:6373
 schedule+0x11c/0x1c8 kernel/sched/core.c:6456
 wb_wait_for_completion+0x160/0x2b4 fs/fs-writeback.c:191
 __writeback_inodes_sb_nr+0x244/0x2d8 fs/fs-writeback.c:2684
 try_to_writeback_inodes_sb+0xa0/0xc4 fs/fs-writeback.c:2732
 ext4_nonda_switch fs/ext4/inode.c:2944 [inline]
 ext4_da_write_begin+0x1b4/0x8e8 fs/ext4/inode.c:2971
 generic_perform_write+0x24c/0x520 mm/filemap.c:3785
 ext4_buffered_write_iter+0x3fc/0x528 fs/ext4/file.c:268
 ext4_file_write_iter+0x684/0x1618
 __kernel_write+0x488/0x8b8 fs/read_write.c:539
 __dump_emit+0x200/0x338 fs/coredump.c:875
 dump_emit+0x288/0x36c fs/coredump.c:912
 dump_user_range+0xd0/0x35c fs/coredump.c:949
 elf_core_dump+0x2ef4/0x3640 fs/binfmt_elf.c:2285
 do_coredump+0x12c8/0x2890 fs/coredump.c:826
 get_signal+0x3dc/0x1550 kernel/signal.c:2886
 do_signal arch/arm64/kernel/signal.c:890 [inline]
 do_notify_resume+0x320/0x32b8 arch/arm64/kernel/signal.c:943
 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline]
 el0_da+0x118/0x20c arch/arm64/kernel/entry-common.c:495
 el0t_64_sync_handler+0xc0/0xe4 arch/arm64/kernel/entry-common.c:629
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584

Showing all locks held in the system:
1 lock held by khungtaskd/27:
 #0: ffff800014c822e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:311
4 locks held by kworker/u4:2/148:
2 locks held by getty/3781:
 #0: ffff0000d2d77098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x40/0x50 drivers/tty/tty_ldsem.c:340
 #1: ffff80001d5ee2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1204 drivers/tty/n_tty.c:2158
3 locks held by syz-executor.2/5776:
 #0: ffff0000d3db6460 (sb_writers#3){.+.+}-{0:0}, at: do_coredump+0x12a4/0x2890 fs/coredump.c:825
 #1: ffff000120b383f0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:789 [inline]
 #1: ffff000120b383f0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0x9c/0x528 fs/ext4/file.c:262
 #2: ffff0000d3db60e0 (&type->s_umount_key#30){++++}-{3:3}, at: try_to_writeback_inodes_sb+0x2c/0xc4 fs/fs-writeback.c:2729
2 locks held by syz-executor.2/6243:
 #0: ffff0000d3db8bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x190/0x36fc fs/ext4/inode.c:2688
 #1: ffff0000d3dbc3f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: __jbd2_log_wait_for_space+0x1a8/0x5cc fs/jbd2/checkpoint.c:71
2 locks held by syz-executor.3/6299:
 #0: ffff0000d3db8bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x190/0x36fc fs/ext4/inode.c:2688
 #1: ffff0000d3dbc3f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: __jbd2_log_wait_for_space+0x1a8/0x5cc fs/jbd2/checkpoint.c:71
2 locks held by syz-executor.4/6396:
2 locks held by syz-executor.0/6420:
 #0: ffff0000d3db8bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x190/0x36fc fs/ext4/inode.c:2688
 #1: ffff0000d3dbc3f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: __jbd2_log_wait_for_space+0x1a8/0x5cc fs/jbd2/checkpoint.c:71
3 locks held by syz-executor.1/7195:
1 lock held by syz-executor.0/7202:
3 locks held by syz-executor.1/7237:
2 locks held by syz-executor.4/7244:
2 locks held by syz-executor.0/7248:
 #0: ffff0000d3db8bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x190/0x36fc fs/ext4/inode.c:2688
 #1: ffff0000d3dbc3f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: __jbd2_log_wait_for_space+0x1a8/0x5cc fs/jbd2/checkpoint.c:71
3 locks held by syz-executor.0/7314:
1 lock held by syz-executor.1/7397:
1 lock held by syz-executor.3/7455:
2 locks held by syz-executor.3/7531:
3 locks held by syz-executor.0/7548:
1 lock held by syz-executor.4/7642:
3 locks held by syz-executor.1/7651:
2 locks held by syz-executor.0/7653:
 #0: ffff0000d3db8bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x190/0x36fc fs/ext4/inode.c:2688
 #1: ffff0000d3dbc3f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: __jbd2_log_wait_for_space+0x1a8/0x5cc fs/jbd2/checkpoint.c:71
2 locks held by syz-executor.0/7676:
2 locks held by syz-executor.4/7903:
3 locks held by syz-executor.2/7905:
 #0: ffff0000d3db6460 (sb_writers#3){.+.+}-{0:0}, at: do_coredump+0x12a4/0x2890 fs/coredump.c:825
 #1: ffff0000e5120de8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:789 [inline]
 #1: ffff0000e5120de8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0x9c/0x528 fs/ext4/file.c:262
 #2: ffff0000d3dbc3f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: __jbd2_log_wait_for_space+0x1a8/0x5cc fs/jbd2/checkpoint.c:71
3 locks held by syz-executor.2/7913:
 #0: ffff0000d3db6460 (sb_writers#3){.+.+}-{0:0}, at: do_coredump+0x12a4/0x2890 fs/coredump.c:825
 #1: ffff0000e12f53b0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:789 [inline]
 #1: ffff0000e12f53b0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0x9c/0x528 fs/ext4/file.c:262
 #2: ffff0000d3dbc3f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: __jbd2_log_wait_for_space+0x1a8/0x5cc fs/jbd2/checkpoint.c:71
4 locks held by syz-executor.0/7915:
3 locks held by syz-executor.4/7917:
3 locks held by syz-executor.3/7922:
 #0: ffff0000d3db6460 (sb_writers#3){.+.+}-{0:0}, at: do_coredump+0x12a4/0x2890 fs/coredump.c:825
 #1: ffff0000e5195da8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:789 [inline]
 #1: ffff0000e5195da8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0x9c/0x528 fs/ext4/file.c:262
 #2: ffff0000d3dbc3f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: __jbd2_log_wait_for_space+0x1a8/0x5cc fs/jbd2/checkpoint.c:71
4 locks held by syz-executor.1/7928:
3 locks held by syz-executor.4/7930:
3 locks held by syz-executor.0/7941:
3 locks held by syz-executor.3/7945:
 #0: ffff0000d3db6460 (sb_writers#3){.+.+}-{0:0}, at: do_coredump+0x12a4/0x2890 fs/coredump.c:825
 #1: ffff0000f17183f0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:789 [inline]
 #1: ffff0000f17183f0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0x9c/0x528 fs/ext4/file.c:262
 #2: ffff0000d3dbc3f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: __jbd2_log_wait_for_space+0x1a8/0x5cc fs/jbd2/checkpoint.c:71
2 locks held by syz-executor.1/7949:
1 lock held by syz-executor.4/7953:
2 locks held by syz-executor.0/7962:
2 locks held by syz-executor.4/7973:
2 locks held by syz-executor.4/7987:
2 locks held by syz-executor.3/7995:
3 locks held by syz-executor.0/7998:
 #0: ffff0000d3db6460 (sb_writers#3){.+.+}-{0:0}, at: do_coredump+0x12a4/0x2890 fs/coredump.c:825
 #1: ffff00012089c9b8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:789 [inline]
 #1: ffff00012089c9b8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0x9c/0x528 fs/ext4/file.c:262
 #2: ffff0000d3dbc3f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: __jbd2_log_wait_for_space+0x1a8/0x5cc fs/jbd2/checkpoint.c:71
2 locks held by syz-executor.4/8001:
2 locks held by syz-executor.2/8021:
2 locks held by syz-executor.4/8026:
3 locks held by syz-executor.3/8034:
 #0: ffff0000d3db6460 (sb_writers#3){.+.+}-{0:0}, at: do_coredump+0x12a4/0x2890 fs/coredump.c:825
 #1: ffff0000de18bfc0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:789 [inline]
 #1: ffff0000de18bfc0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0x9c/0x528 fs/ext4/file.c:262
 #2: ffff0000d3dbc3f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: __jbd2_log_wait_for_space+0x1a8/0x5cc fs/jbd2/checkpoint.c:71
3 locks held by syz-executor.0/8036:
 #0: ffff0000d3db6460 (sb_writers#3){.+.+}-{0:0}, at: do_coredump+0x12a4/0x2890 fs/coredump.c:825
 #1: ffff00012089b5c8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:789 [inline]
 #1: ffff00012089b5c8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0x9c/0x528 fs/ext4/file.c:262
 #2: ffff0000d3dbc3f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: __jbd2_log_wait_for_space+0x1a8/0x5cc fs/jbd2/checkpoint.c:71
2 locks held by syz-executor.4/8038:
2 locks held by syz-executor.1/8047:
2 locks held by syz-executor.4/8050:
2 locks held by syz-executor.2/8052:
2 locks held by syz-executor.0/8053:
2 locks held by syz-executor.3/8054:
2 locks held by syz-executor.2/8059:
2 locks held by syz-executor.1/8069:
3 locks held by syz-executor.3/8073:
 #0: ffff0000d3db6460 (sb_writers#3){.+.+}-{0:0}, at: do_coredump+0x12a4/0x2890 fs/coredump.c:825
 #1: ffff0000e13e2bd0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:789 [inline]
 #1: ffff0000e13e2bd0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0x9c/0x528 fs/ext4/file.c:262
 #2: ffff0000d3dbc3f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: __jbd2_log_wait_for_space+0x1a8/0x5cc fs/jbd2/checkpoint.c:71
2 locks held by syz-executor.4/8074:
3 locks held by syz-executor.0/8075:
2 locks held by syz-executor.2/8084:
3 locks held by syz-executor.1/8085:
2 locks held by syz-executor.3/8086:
2 locks held by syz-executor.0/8094:
3 locks held by syz-executor.3/8100:
 #0: ffff0000d3db6460 (sb_writers#3){.+.+}-{0:0}, at: do_coredump+0x12a4/0x2890 fs/coredump.c:825
 #1: ffff0000e512f198 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:789 [inline]
 #1: ffff0000e512f198 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0x9c/0x528 fs/ext4/file.c:262
 #2: ffff0000d3dbc3f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: __jbd2_log_wait_for_space+0x1a8/0x5cc fs/jbd2/checkpoint.c:71
2 locks held by syz-executor.4/8102:
2 locks held by syz-executor.4/8114:
2 locks held by syz-executor.2/8117:
2 locks held by syz-executor.1/8131:
3 locks held by syz-executor.4/8134:
2 locks held by syz-executor.2/8144:
2 locks held by syz-executor.0/8150:
2 locks held by syz-executor.0/8155:
2 locks held by syz-executor.0/8162:
2 locks held by syz-executor.1/8166:
2 locks held by syz-executor.4/8167:
3 locks held by syz-executor.2/8170:
3 locks held by syz-executor.3/8173:
2 locks held by syz-executor.1/8176:
3 locks held by syz-executor.2/8184:
3 locks held by syz-executor.3/8188:
2 locks held by syz-executor.4/8189:
2 locks held by syz-executor.0/8190:
3 locks held by syz-executor.2/8201:
2 locks held by syz-executor.1/8203:
2 locks held by syz-executor.3/8202:
3 locks held by syz-executor.0/8207:
3 locks held by syz-executor.4/8212:
2 locks held by syz-executor.1/8216:
2 locks held by syz-executor.3/8217:
2 locks held by syz-executor.2/8220:
3 locks held by syz-executor.0/8224:
3 locks held by syz-executor.1/8230:
2 locks held by syz-executor.3/8232:
3 locks held by syz-executor.2/8234:
3 locks held by syz-executor.1/8244:
3 locks held by syz-executor.0/8246:
2 locks held by syz-executor.2/8247:
1 lock held by syz-executor.3/8252:
2 locks held by syz-executor.4/8256:
3 locks held by syz-executor.1/8260:
2 locks held by syz-executor.0/8262:

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