INFO: task syz-executor.3:5097 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:23808 pid: 5097 ppid: 4517 flags:0x00004002 Call Trace: context_switch kernel/sched/core.c:5030 [inline] __schedule+0x11b8/0x43b0 kernel/sched/core.c:6376 schedule+0x11b/0x1e0 kernel/sched/core.c:6459 wb_wait_for_completion+0x164/0x290 fs/fs-writeback.c:191 __writeback_inodes_sb_nr+0x1f3/0x240 fs/fs-writeback.c:2684 try_to_writeback_inodes_sb+0x96/0xc0 fs/fs-writeback.c:2732 ext4_nonda_switch fs/ext4/inode.c:2945 [inline] ext4_da_write_begin+0x213/0xb30 fs/ext4/inode.c:2972 generic_perform_write+0x2aa/0x530 mm/filemap.c:3785 ext4_buffered_write_iter+0x25f/0x3b0 fs/ext4/file.c:268 ext4_file_write_iter+0x773/0x17b0 fs/ext4/file.c:-1 __kernel_write+0x4f9/0x930 fs/read_write.c:539 __dump_emit+0x243/0x360 fs/coredump.c:943 dump_user_range+0x84/0x340 fs/coredump.c:1017 elf_core_dump+0x2ff7/0x3530 fs/binfmt_elf.c:2285 do_coredump+0x1419/0x2960 fs/coredump.c:894 get_signal+0x40a/0x12c0 kernel/signal.c:2886 arch_do_signal_or_restart+0xc1/0x1300 arch/x86/kernel/signal.c:867 handle_signal_work kernel/entry/common.c:154 [inline] exit_to_user_mode_loop+0x9e/0x130 kernel/entry/common.c:178 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214 irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:320 exc_page_fault+0x88/0x100 arch/x86/mm/fault.c:1504 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:606 RIP: 0033:0xe9 RSP: 002b:0000000020000268 EFLAGS: 00010217 RAX: 0000000000000000 RBX: 00007fb8ff549050 RCX: 00007fb8ff429b29 RDX: 0000000000000000 RSI: 0000000020000260 RDI: 0000000000000000 RBP: 00007fb8ff47547a R08: 0000000020000300 R09: 0000000020000300 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007fb8ff549050 R15: 00007ffd350bb6e8 INFO: task syz-executor.5:5112 blocked for more than 144 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:23872 pid: 5112 ppid: 4528 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5030 [inline] __schedule+0x11b8/0x43b0 kernel/sched/core.c:6376 schedule+0x11b/0x1e0 kernel/sched/core.c:6459 wb_wait_for_completion+0x164/0x290 fs/fs-writeback.c:191 __writeback_inodes_sb_nr+0x1f3/0x240 fs/fs-writeback.c:2684 try_to_writeback_inodes_sb+0x96/0xc0 fs/fs-writeback.c:2732 ext4_nonda_switch fs/ext4/inode.c:2945 [inline] ext4_da_write_begin+0x213/0xb30 fs/ext4/inode.c:2972 generic_perform_write+0x2aa/0x530 mm/filemap.c:3785 ext4_buffered_write_iter+0x25f/0x3b0 fs/ext4/file.c:268 ext4_file_write_iter+0x773/0x17b0 fs/ext4/file.c:-1 __kernel_write+0x4f9/0x930 fs/read_write.c:539 __dump_emit+0x243/0x360 fs/coredump.c:943 dump_user_range+0x84/0x340 fs/coredump.c:1017 elf_core_dump+0x2ff7/0x3530 fs/binfmt_elf.c:2285 do_coredump+0x1419/0x2960 fs/coredump.c:894 get_signal+0x40a/0x12c0 kernel/signal.c:2886 arch_do_signal_or_restart+0xc1/0x1300 arch/x86/kernel/signal.c:867 handle_signal_work kernel/entry/common.c:154 [inline] exit_to_user_mode_loop+0x9e/0x130 kernel/entry/common.c:178 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214 irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:320 exc_page_fault+0x88/0x100 arch/x86/mm/fault.c:1504 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:606 RIP: 0033:0xe9 RSP: 002b:0000000020000268 EFLAGS: 00010217 RAX: 0000000000000000 RBX: 00007fd3a7b7bf80 RCX: 00007fd3a7a5cb29 RDX: 0000000000000000 RSI: 0000000020000260 RDI: 0000000000000000 RBP: 00007fd3a7aa847a R08: 0000000020000300 R09: 0000000020000300 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fd3a7b7bf80 R15: 00007ffef9bae038 INFO: task syz-executor.2:5129 blocked for more than 146 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:23136 pid: 5129 ppid: 4527 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5030 [inline] __schedule+0x11b8/0x43b0 kernel/sched/core.c:6376 schedule+0x11b/0x1e0 kernel/sched/core.c:6459 wb_wait_for_completion+0x164/0x290 fs/fs-writeback.c:191 __writeback_inodes_sb_nr+0x1f3/0x240 fs/fs-writeback.c:2684 try_to_writeback_inodes_sb+0x96/0xc0 fs/fs-writeback.c:2732 ext4_nonda_switch fs/ext4/inode.c:2945 [inline] ext4_da_write_begin+0x213/0xb30 fs/ext4/inode.c:2972 generic_perform_write+0x2aa/0x530 mm/filemap.c:3785 ext4_buffered_write_iter+0x25f/0x3b0 fs/ext4/file.c:268 ext4_file_write_iter+0x773/0x17b0 fs/ext4/file.c:-1 __kernel_write+0x4f9/0x930 fs/read_write.c:539 __dump_emit+0x243/0x360 fs/coredump.c:943 dump_user_range+0x84/0x340 fs/coredump.c:1017 elf_core_dump+0x2ff7/0x3530 fs/binfmt_elf.c:2285 do_coredump+0x1419/0x2960 fs/coredump.c:894 get_signal+0x40a/0x12c0 kernel/signal.c:2886 arch_do_signal_or_restart+0xc1/0x1300 arch/x86/kernel/signal.c:867 handle_signal_work kernel/entry/common.c:154 [inline] exit_to_user_mode_loop+0x9e/0x130 kernel/entry/common.c:178 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214 irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:320 exc_page_fault+0x88/0x100 arch/x86/mm/fault.c:1504 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:606 RIP: 0033:0x0 RSP: 002b:0000000020000048 EFLAGS: 00010217 RAX: 0000000000000000 RBX: 00007fcdc388df80 RCX: 00007fcdc376eb29 RDX: 0000000020000140 RSI: 0000000020000040 RDI: 0000000000008000 RBP: 00007fcdc37ba47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 000000000000000b R14: 00007fcdc388df80 R15: 00007fffa7b396f8 INFO: task syz-executor.3:5360 blocked for more than 147 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:23872 pid: 5360 ppid: 4517 flags:0x00004002 Call Trace: context_switch kernel/sched/core.c:5030 [inline] __schedule+0x11b8/0x43b0 kernel/sched/core.c:6376 schedule+0x11b/0x1e0 kernel/sched/core.c:6459 wb_wait_for_completion+0x164/0x290 fs/fs-writeback.c:191 __writeback_inodes_sb_nr+0x1f3/0x240 fs/fs-writeback.c:2684 try_to_writeback_inodes_sb+0x96/0xc0 fs/fs-writeback.c:2732 ext4_nonda_switch fs/ext4/inode.c:2945 [inline] ext4_da_write_begin+0x213/0xb30 fs/ext4/inode.c:2972 generic_perform_write+0x2aa/0x530 mm/filemap.c:3785 ext4_buffered_write_iter+0x25f/0x3b0 fs/ext4/file.c:268 ext4_file_write_iter+0x773/0x17b0 fs/ext4/file.c:-1 __kernel_write+0x4f9/0x930 fs/read_write.c:539 __dump_emit+0x243/0x360 fs/coredump.c:943 dump_user_range+0x84/0x340 fs/coredump.c:1017 elf_core_dump+0x2ff7/0x3530 fs/binfmt_elf.c:2285 do_coredump+0x1419/0x2960 fs/coredump.c:894 get_signal+0x40a/0x12c0 kernel/signal.c:2886 arch_do_signal_or_restart+0xc1/0x1300 arch/x86/kernel/signal.c:867 handle_signal_work kernel/entry/common.c:154 [inline] exit_to_user_mode_loop+0x9e/0x130 kernel/entry/common.c:178 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214 irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:320 exc_page_fault+0x88/0x100 arch/x86/mm/fault.c:1504 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:606 RIP: 0033:0x0 RSP: 002b:0000000020000048 EFLAGS: 00010217 RAX: 0000000000000000 RBX: 00007fb8ff548f80 RCX: 00007fb8ff429b29 RDX: 0000000020000140 RSI: 0000000020000040 RDI: 0000000000008000 RBP: 00007fb8ff47547a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 000000000000000b R14: 00007fb8ff548f80 R15: 00007ffd350bb6e8 Showing all locks held in the system: 4 locks held by kworker/u4:0/9: 2 locks held by kworker/0:1/13: #0: ffff888016872138 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x760/0x1000 kernel/workqueue.c:-1 #1: ffffc90000d27d00 ((work_completion)(&rew.rew_work)){+.+.}-{0:0}, at: process_one_work+0x7a3/0x1000 kernel/workqueue.c:2285 1 lock held by khungtaskd/27: #0: ffffffff8c11c320 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 5 locks held by kworker/u4:1/144: #0: ffff8880b913a318 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:475 #1: ffff8880b9127848 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x4d6/0x810 kernel/sched/psi.c:891 #2: ffff8880b9128098 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x123/0x270 kernel/time/timer.c:946 #3: ffffffff8c11c320 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 #4: ffff88814d47c9a8 (&s->s_inode_wblist_lock){..-.}-{2:2}, at: sb_clear_inode_writeback+0x74/0x360 fs/fs-writeback.c:1330 2 locks held by getty/3948: #0: ffff88802ba4e098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252 #1: ffffc900026562e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x5ba/0x1a30 drivers/tty/n_tty.c:2158 2 locks held by kworker/0:4/4212: #0: ffff888016872138 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x760/0x1000 kernel/workqueue.c:-1 #1: ffffc9000329fd00 ((work_completion)(&rew.rew_work)){+.+.}-{0:0}, at: process_one_work+0x7a3/0x1000 kernel/workqueue.c:2285 3 locks held by syz-executor.3/5097: #0: ffff88814d47c460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x13fd/0x2960 fs/coredump.c:893 #1: ffff888066fa2bd0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff888066fa2bd0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xa6/0x3b0 fs/ext4/file.c:262 #2: ffff88814d47c0e0 (&type->s_umount_key#32){++++}-{3:3}, at: try_to_writeback_inodes_sb+0x1e/0xc0 fs/fs-writeback.c:2729 3 locks held by syz-executor.5/5112: #0: ffff88814d47c460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x13fd/0x2960 fs/coredump.c:893 #1: ffff888066fa49b8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff888066fa49b8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xa6/0x3b0 fs/ext4/file.c:262 #2: ffff88814d47c0e0 (&type->s_umount_key#32){++++}-{3:3}, at: try_to_writeback_inodes_sb+0x1e/0xc0 fs/fs-writeback.c:2729 3 locks held by syz-executor.2/5129: #0: ffff88814d47c460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x13fd/0x2960 fs/coredump.c:893 #1: ffff888066ddf198 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff888066ddf198 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xa6/0x3b0 fs/ext4/file.c:262 #2: ffff88814d47c0e0 (&type->s_umount_key#32){++++}-{3:3}, at: try_to_writeback_inodes_sb+0x1e/0xc0 fs/fs-writeback.c:2729 3 locks held by syz-executor.3/5360: #0: ffff88814d47c460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x13fd/0x2960 fs/coredump.c:893 #1: ffff88805ca6bfc0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff88805ca6bfc0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xa6/0x3b0 fs/ext4/file.c:262 #2: ffff88814d47c0e0 (&type->s_umount_key#32){++++}-{3:3}, at: try_to_writeback_inodes_sb+0x1e/0xc0 fs/fs-writeback.c:2729 1 lock held by syz-executor.0/6494: 1 lock held by syz-executor.5/6500: #0: ffff88814d47ebd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1c0/0x2d20 fs/ext4/inode.c:2689 2 locks held by syz-executor.1/6511: 1 lock held by syz-executor.3/6526: 1 lock held by syz-executor.1/6540: #0: ffff88814d47ebd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1c0/0x2d20 fs/ext4/inode.c:2689 1 lock held by syz-executor.1/6560: 1 lock held by syz-executor.4/6585: #0: ffff88814d47ebd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1c0/0x2d20 fs/ext4/inode.c:2689 1 lock held by syz-executor.0/6605: #0: ffff88814d47ebd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1c0/0x2d20 fs/ext4/inode.c:2689 1 lock held by syz-executor.1/6620: 1 lock held by syz-executor.1/6621: #0: ffff88814d47ebd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1c0/0x2d20 fs/ext4/inode.c:2689 1 lock held by syz-executor.4/6645: #0: ffff88814d47ebd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1c0/0x2d20 fs/ext4/inode.c:2689 1 lock held by syz-executor.5/6655: 1 lock held by syz-executor.0/7399: 1 lock held by syz-executor.1/7481: 1 lock held by syz-executor.1/7537: 1 lock held by syz-executor.0/7650: 2 locks held by syz-executor.0/7947: 1 lock held by syz-executor.0/7948: 1 lock held by syz-executor.0/7952: 1 lock held by syz-executor.0/7963: 1 lock held by syz-executor.0/7967: 1 lock held by syz-executor.1/8025: 1 lock held by syz-executor.1/8079: 1 lock held by syz-executor.5/8098: 1 lock held by syz-executor.5/8104: 1 lock held by syz-executor.0/8141: #0: ffff88814d47ebd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1c0/0x2d20 fs/ext4/inode.c:2689 1 lock held by syz-executor.1/8145: 1 lock held by syz-executor.1/8148: 1 lock held by syz-executor.3/8166: 1 lock held by syz-executor.5/8190: 1 lock held by syz-executor.3/8220: 1 lock held by syz-executor.0/8237: 1 lock held by syz-executor.1/8258: 2 locks held by syz-executor.3/8482: 1 lock held by syz-executor.3/8518: 1 lock held by syz-executor.0/8816: 1 lock held by syz-executor.4/8819: #0: ffff88814d47ebd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1c0/0x2d20 fs/ext4/inode.c:2689 1 lock held by syz-executor.3/8832: #0: ffff88814d47ebd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1c0/0x2d20 fs/ext4/inode.c:2689 1 lock held by syz-executor.3/8863: #0: ffff88814d47ebd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1c0/0x2d20 fs/ext4/inode.c:2689 1 lock held by syz-executor.3/8873: #0: ffff88814d47ebd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1c0/0x2d20 fs/ext4/inode.c:2689 1 lock held by syz-executor.3/8874: 1 lock held by syz-executor.4/8879: #0: ffff88814d47ebd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1c0/0x2d20 fs/ext4/inode.c:2689 1 lock held by syz-executor.0/8892: 1 lock held by syz-executor.4/8901: #0: ffff88814d47ebd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1c0/0x2d20 fs/ext4/inode.c:2689 1 lock held by syz-executor.5/8913: 1 lock held by syz-executor.2/8922: 1 lock held by syz-executor.3/8937: #0: ffff88814d47ebd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1c0/0x2d20 fs/ext4/inode.c:2689 1 lock held by syz-executor.0/8950: 2 locks held by syz-executor.5/8952: #0: ffff88814d47ebd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1c0/0x2d20 fs/ext4/inode.c:2689 #1: ffff88807f0383f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: __jbd2_log_wait_for_space+0x216/0x660 fs/jbd2/checkpoint.c:71 2 locks held by syz-executor.2/8964: #0: ffff88814d47ebd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1c0/0x2d20 fs/ext4/inode.c:2689 #1: ffff88807f0383f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: __jbd2_log_wait_for_space+0x216/0x660 fs/jbd2/checkpoint.c:71 2 locks held by syz-executor.2/8972: #0: ffff88814d47ebd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1c0/0x2d20 fs/ext4/inode.c:2689 #1: ffff88807f0383f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: __jbd2_log_wait_for_space+0x216/0x660 fs/jbd2/checkpoint.c:71 2 locks held by syz-executor.1/8977: #0: ffff88814d47ebd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1c0/0x2d20 fs/ext4/inode.c:2689 #1: ffff8880b903a318 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:475 1 lock held by syz-executor.3/8990: #0: ffff88814d47ebd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1c0/0x2d20 fs/ext4/inode.c:2689 1 lock held by syz-executor.3/8993: 1 lock held by syz-executor.0/9013: #0: ffff88814d47ebd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1c0/0x2d20 fs/ext4/inode.c:2689 2 locks held by syz-executor.4/9019: 1 lock held by syz-executor.0/9022: 1 lock held by syz-executor.2/9088: 1 lock held by syz-executor.4/9182: #0: ffff88814d47ebd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1c0/0x2d20 fs/ext4/inode.c:2689 1 lock held by syz-executor.4/9221: #0: ffff88814d47ebd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1c0/0x2d20 fs/ext4/inode.c:2689 1 lock held by syz-executor.3/9271: 1 lock held by syz-executor.4/9281: 1 lock held by syz-executor.0/9291: #0: ffff88814d47ebd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1c0/0x2d20 fs/ext4/inode.c:2689 3 locks held by kworker/u4:7/10413: #0: ffff888016879138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x760/0x1000 kernel/workqueue.c:-1 #1: ffffc90005747d00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x7a3/0x1000 kernel/workqueue.c:2285 #2: ffffffff8d235f08 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xa/0x50 net/core/link_watch.c:251 1 lock held by syz-executor.0/11139: 2 locks held by syz-executor.1/11155: #0: ffffffff8d235f08 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8d235f08 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x974/0xe60 net/core/rtnetlink.c:5647 #1: ffffffff8c120da8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline] #1: ffffffff8c120da8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x347/0x6b0 kernel/rcu/tree_exp.h:845 1 lock held by syz-executor.2/11208: #0: ffff88814d47ebd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1c0/0x2d20 fs/ext4/inode.c:2689 1 lock held by syz-executor.0/11213: 1 lock held by syz-executor.3/11217: 2 locks held by syz-executor.3/11227: 3 locks held by syz-executor.3/11228: 1 lock held by syz-executor.0/11232: 2 locks held by syz-executor.0/11235: 2 locks held by syz-executor.5/11242: #0: ffffffff8d22a290 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x32e/0x5b0 net/core/net_namespace.c:499