INFO: task syz-executor.5:6815 blocked for more than 143 seconds. Not tainted 5.15.167-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:21144 pid: 6815 ppid: 5860 flags:0x00004002 Call Trace: context_switch kernel/sched/core.c:5027 [inline] __schedule+0x12c4/0x45b0 kernel/sched/core.c:6373 schedule+0x11b/0x1f0 kernel/sched/core.c:6456 wb_wait_for_completion+0x164/0x290 fs/fs-writeback.c:191 __writeback_inodes_sb_nr+0x2ce/0x370 fs/fs-writeback.c:2684 try_to_writeback_inodes_sb+0x94/0xb0 fs/fs-writeback.c:2732 ext4_nonda_switch fs/ext4/inode.c:2944 [inline] ext4_da_write_begin+0x228/0xb60 fs/ext4/inode.c:2971 generic_perform_write+0x2bf/0x5b0 mm/filemap.c:3785 ext4_buffered_write_iter+0x227/0x360 fs/ext4/file.c:268 ext4_file_write_iter+0x87c/0x1990 __kernel_write+0x5b1/0xa60 fs/read_write.c:539 __dump_emit+0x264/0x3a0 fs/coredump.c:875 dump_user_range+0x91/0x320 fs/coredump.c:949 elf_core_dump+0x3c7d/0x4570 fs/binfmt_elf.c:2285 do_coredump+0x1852/0x31e0 fs/coredump.c:826 get_signal+0xc06/0x14e0 kernel/signal.c:2883 arch_do_signal_or_restart+0xc3/0x1890 arch/x86/kernel/signal.c:867 handle_signal_work kernel/entry/common.c:154 [inline] exit_to_user_mode_loop+0x97/0x130 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+0x342/0x700 arch/x86/mm/fault.c:1504 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:568 RIP: 0033:0x0 RSP: 002b:0000000020000008 EFLAGS: 00010217 RAX: 0000000000000000 RBX: 00007fa048397f80 RCX: 00007fa048278ba9 RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000080000 RBP: 00007fa0482c447a R08: 00000000200000c0 R09: 00000000200000c0 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 000000000000000b R14: 00007fa048397f80 R15: 00007fff0c358748 Showing all locks held in the system: 2 locks held by kworker/u4:0/9: 1 lock held by khungtaskd/27: #0: ffffffff8c91fc60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 4 locks held by kworker/u4:4/2610: 2 locks held by getty/3325: #0: ffff888029e4b098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252 #1: ffffc9000248e2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6af/0x1db0 drivers/tty/n_tty.c:2158 2 locks held by kworker/1:5/3958: #0: ffff888017072138 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2283 #1: ffffc90003487d20 ((work_completion)(&rew.rew_work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2285 4 locks held by kworker/u4:6/4141: #0: ffff8880171d5938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2283 #1: ffffc90002ec7d20 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2285 #2: ffffffff8da261d0 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xf1/0xb60 net/core/net_namespace.c:561 #3: ffffffff8c924228 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline] #3: ffffffff8c924228 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x280/0x740 kernel/rcu/tree_exp.h:845 2 locks held by kworker/u4:9/5863: 2 locks held by syz-executor.5/6815: 1 lock held by syz-executor.4/6948: 1 lock held by syz-executor.5/6953: 1 lock held by syz-executor.3/6955: 1 lock held by syz-executor.2/6969: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.1/6970: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.1/6971: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.5/6979: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.4/6987: 1 lock held by syz-executor.0/6992: 1 lock held by syz-executor.1/6998: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.2/7004: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.3/7007: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.5/7011: 1 lock held by syz-executor.5/7017: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.3/7021: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.5/7035: 1 lock held by syz-executor.0/7037: 1 lock held by syz-executor.4/7042: 1 lock held by syz-executor.2/7044: 1 lock held by syz-executor.3/7049: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.3/7053: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.5/7060: 1 lock held by syz-executor.4/7066: 1 lock held by syz-executor.5/7070: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.1/7078: 1 lock held by syz-executor.2/7079: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.5/7086: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.3/7088: 1 lock held by syz-executor.0/7105: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.5/7112: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.3/7117: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.2/7139: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.3/7155: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.4/7166: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.2/7204: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.5/7206: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.1/7216: 1 lock held by syz-executor.2/7235: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.2/7238: 1 lock held by syz-executor.0/7246: 1 lock held by syz-executor.4/7635: 1 lock held by syz-executor.1/7721: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.5/7864: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.5/8547: 1 lock held by syz-executor.5/8553: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.0/8560: 1 lock held by syz-executor.4/8585: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.4/8586: 1 lock held by syz-executor.5/8591: 1 lock held by syz-executor.1/8595: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.4/8615: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.5/8643: 1 lock held by syz-executor.5/8679: 1 lock held by syz-executor.2/8682: 1 lock held by syz-executor.4/8690: 1 lock held by syz-executor.0/8696: 1 lock held by syz-executor.5/8698: 1 lock held by syz-executor.3/8701: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.2/8710: 1 lock held by syz-executor.1/8716: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.0/8729: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.3/8737: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.4/8741: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.2/8750: 1 lock held by syz-executor.3/8758: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.2/8763: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.5/8772: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.0/8807: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.1/8811: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.1/8816: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.2/8821: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.0/8848: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.0/8854: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.3/8873: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.1/8875: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.4/8876: 1 lock held by syz-executor.1/8885: 1 lock held by syz-executor.0/8891: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.2/8897: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.4/8913: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.3/8914: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.4/8916: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.3/8923: 1 lock held by syz-executor.5/8924: 1 lock held by syz-executor.0/8933: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.2/8935: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.0/8938: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.1/8940: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.1/8950: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.4/8956: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.3/8963: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.3/8965: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.0/8973: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.0/8976: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.1/8999: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.3/9006: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.0/9009: 1 lock held by syz-executor.1/9014: 1 lock held by syz-executor.1/9021: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.2/9031: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.5/9046: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 2 locks held by syz-executor.0/9056: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 #1: ffff8880b913a318 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:475 1 lock held by syz-executor.0/9058: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.1/9082: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.2/9092: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.2/9093: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.4/9100: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.4/9105: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.4/9106: 1 lock held by syz-executor.5/9108: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.4/9203: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.1/9225: 1 lock held by syz-executor.4/9255: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.2/9369: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.1/9385: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.5/9511: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.1/9513: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.0/9517: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.4/9535: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.4/9537: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.2/9544: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.0/9545: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.1/9560: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.4/9563: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.2/9575: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.0/9578: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.1/9587: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.2/9602: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.0/9611: 1 lock held by syz-executor.1/9614: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.5/9622: 1 lock held by syz-executor.2/9630: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.2/9631: 1 lock held by syz-executor.0/9639: #0: ffffffff8c924130 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x9c/0x4e0 kernel/rcu/tree.c:4039 1 lock held by syz-executor.5/9671: #0: ffff88807e50abd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.15.167-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106 nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline] watchdog+0xe72/0xeb0 kernel/hung_task.c:295 kthread+0x3f6/0x4f0 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 5863 Comm: kworker/u4:9 Not tainted 5.15.167-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: ext4-rsv-conversion ext4_end_io_rsv_work RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:40 [inline] RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:75 [inline] RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:107 [inline] RIP: 0010:lock_pin_lock+0x138/0x430 kernel/locking/lockdep.c:5683 Code: 00 00 00 9c 8f 44 24 60 48 b8 00 00 00 00 00 fc ff df 80 3c 03 00 74 08 4c 89 f7 e8 52 46 67 00 48 8b 44 24 60 48 89 44 24 10 48 c7 c7 00 39 8b 8a e8 eb 83 d1 08 65 ff 05 a4 9a 9f 7e 48 c7 RSP: 0018:ffffc900062d7480 EFLAGS: 00000046 RAX: 0000000000000046 RBX: 1ffff92000c5ae9c RCX: dffffc0000000000 RDX: dffffc0000000000 RSI: 0000000000000004 RDI: ffff8880b913a318 RBP: ffffc900062d7550 R08: dffffc0000000000 R09: 0000000000000003 R10: ffffffffffffffff R11: dffffc0000000001 R12: ffff888021b99dc0 R13: 0000000000000000 R14: ffffc900062d74e0 R15: 1ffff92000c5ae94 FS: 0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005625b7491950 CR3: 0000000073e5b000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rq_pin_lock kernel/sched/sched.h:1544 [inline] rq_lock kernel/sched/sched.h:1622 [inline] ttwu_queue kernel/sched/core.c:3818 [inline] try_to_wake_up+0x74c/0x1300 kernel/sched/core.c:4143 autoremove_wake_function+0x12/0x110 kernel/sched/wait.c:416 __wake_up_common+0x2a0/0x4e0 kernel/sched/wait.c:108 __wake_up_common_lock kernel/sched/wait.c:138 [inline] __wake_up+0x112/0x1c0 kernel/sched/wait.c:157 sub_reserved_credits fs/jbd2/transaction.c:214 [inline] start_this_handle+0x115c/0x1570 fs/jbd2/transaction.c:443 jbd2_journal_start_reserved+0xe3/0x300 fs/jbd2/transaction.c:625 __ext4_journal_start_reserved+0x224/0x420 fs/ext4/ext4_jbd2.c:154 ext4_convert_unwritten_io_end_vec+0x30/0x170 fs/ext4/extents.c:4878 ext4_end_io_end fs/ext4/page-io.c:186 [inline] ext4_do_flush_completed_IO fs/ext4/page-io.c:259 [inline] ext4_end_io_rsv_work+0x368/0x6e0 fs/ext4/page-io.c:273 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457 kthread+0x3f6/0x4f0 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287