INFO: task syz-executor.3:13993 blocked for more than 143 seconds. Not tainted 6.4.0-syzkaller-11479-g6cd06ab12d1a #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:24872 pid:13993 ppid:13561 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5381 [inline] __schedule+0xc9a/0x5880 kernel/sched/core.c:6710 schedule+0xde/0x1a0 kernel/sched/core.c:6786 wb_wait_for_completion+0x182/0x240 fs/fs-writeback.c:192 __writeback_inodes_sb_nr+0x1d7/0x280 fs/fs-writeback.c:2650 try_to_writeback_inodes_sb+0x98/0xc0 fs/fs-writeback.c:2698 ext4_nonda_switch+0x1aa/0x1f0 fs/ext4/inode.c:2838 ext4_da_write_begin+0x172/0x8c0 fs/ext4/inode.c:2865 generic_perform_write+0x26b/0x5d0 mm/filemap.c:3923 ext4_buffered_write_iter+0x123/0x3d0 fs/ext4/file.c:299 ext4_file_write_iter+0x8f2/0x1880 fs/ext4/file.c:722 __kernel_write_iter+0x262/0x7e0 fs/read_write.c:517 dump_emit_page fs/coredump.c:888 [inline] dump_user_range+0x23c/0x710 fs/coredump.c:915 elf_core_dump+0x27f4/0x3790 fs/binfmt_elf.c:2142 do_coredump+0x2f44/0x4050 fs/coredump.c:764 get_signal+0x1c16/0x25f0 kernel/signal.c:2863 arch_do_signal_or_restart+0x79/0x5c0 arch/x86/kernel/signal.c:308 exit_to_user_mode_loop kernel/entry/common.c:168 [inline] exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204 irqentry_exit_to_user_mode+0x9/0x40 kernel/entry/common.c:310 exc_page_fault+0xc0/0x170 arch/x86/mm/fault.c:1545 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 RIP: 0033:0x430a RSP: 002b:0000000020000088 EFLAGS: 00010217 RAX: 0000000000000000 RBX: 00007fb2ac7abf80 RCX: 00007fb2ac68c389 RDX: 00000000200000c0 RSI: 0000000020000080 RDI: 0000000080220000 RBP: 00007fb2ac6d7493 R08: 0000000020000140 R09: 0000000020000140 R10: 0000000020000100 R11: 0000000000000206 R12: 0000000000000000 R13: 00007ffc1b4d634f R14: 00007fb2ad4be300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/13: #0: ffffffff8c9a3af0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:522 1 lock held by rcu_tasks_trace/14: #0: ffffffff8c9a37f0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:522 1 lock held by khungtaskd/28: #0: ffffffff8c9a4700 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x340 kernel/locking/lockdep.c:6615 3 locks held by kworker/u4:6/2883: #0: ffff888019674938 ((wq_completion)writeback){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:20 [inline] #0: ffff888019674938 ((wq_completion)writeback){+.+.}-{0:0}, at: raw_atomic64_set include/linux/atomic/atomic-arch-fallback.h:2608 [inline] #0: ffff888019674938 ((wq_completion)writeback){+.+.}-{0:0}, at: raw_atomic_long_set include/linux/atomic/atomic-long.h:79 [inline] #0: ffff888019674938 ((wq_completion)writeback){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:3196 [inline] #0: ffff888019674938 ((wq_completion)writeback){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:675 [inline] #0: ffff888019674938 ((wq_completion)writeback){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:702 [inline] #0: ffff888019674938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x8fd/0x16f0 kernel/workqueue.c:2567 #1: ffffc9000c50fdb0 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x930/0x16f0 kernel/workqueue.c:2571 #2: ffff88802cd48bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1a8/0x640 mm/page-writeback.c:2551 2 locks held by getty/4772: #0: ffff888028e0e098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc900015a02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xf08/0x13f0 drivers/tty/n_tty.c:2187 4 locks held by kworker/u4:5/1599: #0: ffff88802c5ea138 ((wq_completion)ext4-rsv-conversion){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:20 [inline] #0: ffff88802c5ea138 ((wq_completion)ext4-rsv-conversion){+.+.}-{0:0}, at: raw_atomic64_set include/linux/atomic/atomic-arch-fallback.h:2608 [inline] #0: ffff88802c5ea138 ((wq_completion)ext4-rsv-conversion){+.+.}-{0:0}, at: raw_atomic_long_set include/linux/atomic/atomic-long.h:79 [inline] #0: ffff88802c5ea138 ((wq_completion)ext4-rsv-conversion){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:3196 [inline] #0: ffff88802c5ea138 ((wq_completion)ext4-rsv-conversion){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:675 [inline] #0: ffff88802c5ea138 ((wq_completion)ext4-rsv-conversion){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:702 [inline] #0: ffff88802c5ea138 ((wq_completion)ext4-rsv-conversion){+.+.}-{0:0}, at: process_one_work+0x8fd/0x16f0 kernel/workqueue.c:2567 #1: ffffc9000343fdb0 ((work_completion)(&ei->i_rsv_conversion_work)){+.+.}-{0:0}, at: process_one_work+0x930/0x16f0 kernel/workqueue.c:2571 #2: ffff8880b993c3d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2f/0x120 kernel/sched/core.c:558 #3: ffffe8ffffd7e1c8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x582/0x950 kernel/sched/psi.c:945 3 locks held by syz-executor.4/6209: #0: ffff88802d27e410 (sb_writers#4){.+.+}-{0:0}, at: do_unlinkat+0x190/0x680 fs/namei.c:4376 #1: ffff888040946800 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:806 [inline] #1: ffff888040946800 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: do_unlinkat+0x280/0x680 fs/namei.c:4380 #2: ffff88803f0d8400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #2: ffff88803f0d8400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: vfs_unlink+0xd9/0x930 fs/namei.c:4318 3 locks held by syz-executor.2/13559: #0: ffff88802d27e410 (sb_writers#4){.+.+}-{0:0}, at: do_unlinkat+0x190/0x680 fs/namei.c:4376 #1: ffff88802f88b600 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:806 [inline] #1: ffff88802f88b600 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: do_unlinkat+0x280/0x680 fs/namei.c:4380 #2: ffff88803b82de00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #2: ffff88803b82de00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: vfs_unlink+0xd9/0x930 fs/namei.c:4318 3 locks held by syz-executor.1/13563: #0: ffff88802d27e410 (sb_writers#4){.+.+}-{0:0}, at: do_unlinkat+0x190/0x680 fs/namei.c:4376 #1: ffff88803f0da200 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:806 [inline] #1: ffff88803f0da200 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: do_unlinkat+0x280/0x680 fs/namei.c:4380 #2: ffff88803b828e00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #2: ffff88803b828e00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: vfs_unlink+0xd9/0x930 fs/namei.c:4318 3 locks held by syz-executor.5/13564: #0: ffff88802d27e410 (sb_writers#4){.+.+}-{0:0}, at: do_unlinkat+0x190/0x680 fs/namei.c:4376 #1: ffff88803f0dd400 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:806 [inline] #1: ffff88803f0dd400 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: do_unlinkat+0x280/0x680 fs/namei.c:4380 #2: ffff888083e74000 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #2: ffff888083e74000 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: vfs_unlink+0xd9/0x930 fs/namei.c:4318 3 locks held by syz-executor.0/13565: #0: ffff88802d27e410 (sb_writers#4){.+.+}-{0:0}, at: do_unlinkat+0x190/0x680 fs/namei.c:4376 #1: ffff88802f88de00 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:806 [inline] #1: ffff88802f88de00 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: do_unlinkat+0x280/0x680 fs/namei.c:4380 #2: ffff88803b82ca00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #2: ffff88803b82ca00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: vfs_unlink+0xd9/0x930 fs/namei.c:4318 3 locks held by syz-executor.3/13993: #0: ffff88802d27e410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x1c16/0x25f0 kernel/signal.c:2863 #1: ffff88802fd3a200 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff88802fd3a200 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb4/0x3d0 fs/ext4/file.c:294 #2: ffff88802d27e0e0 (&type->s_umount_key#31){++++}-{3:3}, at: try_to_writeback_inodes_sb+0x21/0xc0 fs/fs-writeback.c:2695 1 lock held by syz-executor.0/16399: #0: ffff88802cd48bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1a8/0x640 mm/page-writeback.c:2551 1 lock held by syz-executor.0/16507: #0: ffff88802cd48bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1a8/0x640 mm/page-writeback.c:2551 1 lock held by syz-executor.0/17135: #0: ffff88802cd48bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1a8/0x640 mm/page-writeback.c:2551 1 lock held by syz-executor.4/17140: #0: ffff88802cd48bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1a8/0x640 mm/page-writeback.c:2551 1 lock held by syz-executor.5/17146: #0: ffff88802cd48bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1a8/0x640 mm/page-writeback.c:2551 1 lock held by syz-executor.2/17147: #0: ffff88802cd48bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1a8/0x640 mm/page-writeback.c:2551 1 lock held by syz-executor.0/17149: #0: ffff88802cd48bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1a8/0x640 mm/page-writeback.c:2551 1 lock held by syz-executor.4/17153: #0: ffff88802cd48bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1a8/0x640 mm/page-writeback.c:2551 1 lock held by syz-executor.2/17158: #0: ffff88802cd48bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1a8/0x640 mm/page-writeback.c:2551 1 lock held by syz-executor.0/17168: #0: ffff88802cd48bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1a8/0x640 mm/page-writeback.c:2551 1 lock held by syz-executor.4/17171: #0: ffff88802cd48bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1a8/0x640 mm/page-writeback.c:2551 1 lock held by syz-executor.2/17175: #0: ffff88802cd48bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1a8/0x640 mm/page-writeback.c:2551 1 lock held by syz-executor.0/17186: #0: ffff88802cd48bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1a8/0x640 mm/page-writeback.c:2551 1 lock held by syz-executor.1/17187: #0: ffff88802cd48bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1a8/0x640 mm/page-writeback.c:2551 1 lock held by syz-executor.5/17189: #0: ffff88802cd48bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1a8/0x640 mm/page-writeback.c:2551 1 lock held by syz-executor.2/17190: #0: ffff88802cd48bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1a8/0x640 mm/page-writeback.c:2551 1 lock held by syz-executor.4/17192: #0: ffff88802cd48bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1a8/0x640 mm/page-writeback.c:2551 1 lock held by syz-executor.0/17196: #0: ffff88802cd48bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1a8/0x640 mm/page-writeback.c:2551 1 lock held by syz-executor.4/17204: #0: ffff88802cd48bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1a8/0x640 mm/page-writeback.c:2551 1 lock held by syz-executor.1/17206: #0: ffff88802cd48bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1a8/0x640 mm/page-writeback.c:2551 1 lock held by syz-executor.2/17208: #0: ffff88802cd48bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1a8/0x640 mm/page-writeback.c:2551 1 lock held by syz-executor.0/17210: #0: ffff88802cd48bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1a8/0x640 mm/page-writeback.c:2551 1 lock held by syz-executor.2/17215: #0: ffff88802cd48bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1a8/0x640 mm/page-writeback.c:2551 3 locks held by syz-executor.3/17217: #0: ffff88802d27e410 (sb_writers#4){.+.+}-{0:0}, at: do_unlinkat+0x190/0x680 fs/namei.c:4376 #1: ffff88803277e800 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:806 [inline] #1: ffff88803277e800 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: do_unlinkat+0x280/0x680 fs/namei.c:4380 #2: ffff88803f0dac00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #2: ffff88803f0dac00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: vfs_unlink+0xd9/0x930 fs/namei.c:4318 2 locks held by syz-executor.2/17245: #0: ffff88802d27e410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x1c16/0x25f0 kernel/signal.c:2863 #1: ffff888035aae800 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff888035aae800 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb4/0x3d0 fs/ext4/file.c:294 1 lock held by syz-executor.3/17246: #0: ffff88802cd48bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1a8/0x640 mm/page-writeback.c:2551 1 lock held by syz-executor.1/17248: #0: ffff88802cd48bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1a8/0x640 mm/page-writeback.c:2551 2 locks held by syz-executor.5/17249: #0: ffff88802d27e410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x1c16/0x25f0 kernel/signal.c:2863 #1: ffff888081380e00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff888081380e00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb4/0x3d0 fs/ext4/file.c:294 2 locks held by syz-executor.0/17250: #0: ffff88802d27e410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x1c16/0x25f0 kernel/signal.c:2863 #1: ffff888081384000 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff888081384000 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb4/0x3d0 fs/ext4/file.c:294 2 locks held by syz-executor.4/17251: #0: ffff88802d27e410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x1c16/0x25f0 kernel/signal.c:2863 #1: ffff888035aaf200 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff888035aaf200 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb4/0x3d0 fs/ext4/file.c:294 1 lock held by syz-executor.3/17256: #0: ffff88802cd48bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1a8/0x640 mm/page-writeback.c:2551 2 locks held by syz-executor.5/17263: #0: ffff88802d27e410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x1c16/0x25f0 kernel/signal.c:2863 #1: ffff88803f0db600 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff88803f0db600 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb4/0x3d0 fs/ext4/file.c:294 2 locks held by syz-executor.2/17268: #0: ffff88802d27e410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x1c16/0x25f0 kernel/signal.c:2863 #1: ffff88803f0dde00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff88803f0dde00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb4/0x3d0 fs/ext4/file.c:294 2 locks held by syz-executor.1/17269: #0: ffff88802d27e410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x1c16/0x25f0 kernel/signal.c:2863 #1: ffff88803f0d9800 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff88803f0d9800 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb4/0x3d0 fs/ext4/file.c:294 1 lock held by syz-executor.4/17272: #0: ffff88802cd48bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1a8/0x640 mm/page-writeback.c:2551 2 locks held by syz-executor.0/17274: #0: ffff88802d27e410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x1c16/0x25f0 kernel/signal.c:2863 #1: ffff88802f888400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff88802f888400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb4/0x3d0 fs/ext4/file.c:294 2 locks held by syz-executor.2/17282: #0: ffff88802d27e410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x1c16/0x25f0 kernel/signal.c:2863 #1: ffff88808101ca00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff88808101ca00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb4/0x3d0 fs/ext4/file.c:294 2 locks held by syz-executor.5/17285: #0: ffff88802d27e410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x1c16/0x25f0 kernel/signal.c:2863 #1: ffff888074a42200 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff888074a42200 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb4/0x3d0 fs/ext4/file.c:294 2 locks held by syz-executor.1/17304: #0: ffff88802d27e410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x1c16/0x25f0 kernel/signal.c:2863 #1: ffff88803d6fc000 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff88803d6fc000 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb4/0x3d0 fs/ext4/file.c:294 2 locks held by syz-executor.0/17305: #0: ffff88802d27e410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x1c16/0x25f0 kernel/signal.c:2863 #1: ffff8880302bd400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff8880302bd400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb4/0x3d0 fs/ext4/file.c:294 2 locks held by syz-executor.5/17309: #0: ffff88802d27e410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x1c16/0x25f0 kernel/signal.c:2863 #1: ffff88803d6f8400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff88803d6f8400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb4/0x3d0 fs/ext4/file.c:294 2 locks held by syz-executor.4/17310: #0: ffff88802d27e410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x1c16/0x25f0 kernel/signal.c:2863 #1: ffff88803d6ff200 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff88803d6ff200 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb4/0x3d0 fs/ext4/file.c:294 2 locks held by syz-executor.2/17311: #0: ffff88802d27e410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x1c16/0x25f0 kernel/signal.c:2863 #1: ffff8880302bc000 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff8880302bc000 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb4/0x3d0 fs/ext4/file.c:294 2 locks held by syz-executor.1/17322: #0: ffff88802d27e410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x1c16/0x25f0 kernel/signal.c:2863 #1: ffff888031e33600 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff888031e33600 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb4/0x3d0 fs/ext4/file.c:294 2 locks held by syz-executor.5/17326: #0: ffff88802d27e410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x1c16/0x25f0 kernel/signal.c:2863 #1: ffff888081120400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff888081120400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb4/0x3d0 fs/ext4/file.c:294 2 locks held by syz-executor.2/17331: #0: ffff88802d27e410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x1c16/0x25f0 kernel/signal.c:2863 #1: ffff888031e34000 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff888031e34000 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb4/0x3d0 fs/ext4/file.c:294 2 locks held by syz-executor.4/17334: #0: ffff88802d27e410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x1c16/0x25f0 kernel/signal.c:2863 #1: ffff888031e35400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff888031e35400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb4/0x3d0 fs/ext4/file.c:294 2 locks held by syz-executor.1/17347: #0: ffff88802d27e410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x1c16/0x25f0 kernel/signal.c:2863 #1: ffff888031e30400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff888031e30400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb4/0x3d0 fs/ext4/file.c:294 2 locks held by syz-executor.5/17349: #0: ffff88802d27e410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x1c16/0x25f0 kernel/signal.c:2863 #1: ffff88803f33c000 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff88803f33c000 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb4/0x3d0 fs/ext4/file.c:294 2 locks held by syz-executor.0/17351: #0: ffff88802d27e410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x1c16/0x25f0 kernel/signal.c:2863 #1: ffff88802f860400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff88802f860400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb4/0x3d0 fs/ext4/file.c:294 2 locks held by syz-executor.2/17365: #0: ffff88802d27e410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x1c16/0x25f0 kernel/signal.c:2863 #1: ffff8880833f2200 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff8880833f2200 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb4/0x3d0 fs/ext4/file.c:294 2 locks held by syz-executor.0/17369: #0: ffff88802d27e410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x1c16/0x25f0 kernel/signal.c:2863 #1: ffff88802f11de00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff88802f11de00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb4/0x3d0 fs/ext4/file.c:294 2 locks held by syz-executor.5/17374: #0: ffff88802d27e410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x1c16/0x25f0 kernel/signal.c:2863 #1: ffff888031cb0400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff888031cb0400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb4/0x3d0 fs/ext4/file.c:294 2 locks held by syz-executor.0/17378: #0: ffff88802d27e410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x1c16/0x25f0 kernel/signal.c:2863 #1: ffff88803f1f6800 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff88803f1f6800 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb4/0x3d0 fs/ext4/file.c:294 2 locks held by syz-executor.5/17383: #0: ffff88802d27e410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x1c16/0x25f0 kernel/signal.c:2863 #1: ffff8880324ad400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff8880324ad400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb4/0x3d0 fs/ext4/file.c:294 2 locks held by syz-executor.1/17395: #0: ffff88802d27e410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x1c16/0x25f0 kernel/signal.c:2863 #1: ffff888032411800 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff888032411800 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb4/0x3d0 fs/ext4/file.c:294 2 locks held by syz-executor.3/17405: #0: ffff88802d27e410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x1c16/0x25f0 kernel/signal.c:2863 #1: ffff88803277a200 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff88803277a200 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb4/0x3d0 fs/ext4/file.c:294 2 locks held by syz-executor.5/17410: #0: ffff88802d27e410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x1c16/0x25f0 kernel/signal.c:2863 #1: ffff88803277ca00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff88803277ca00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb4/0x3d0 fs/ext4/file.c:294 2 locks held by syz-executor.1/17411: #0: ffff88802d27e410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x1c16/0x25f0 kernel/signal.c:2863 #1: ffff88802f2f2200 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff88802f2f2200 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb4/0x3d0 fs/ext4/file.c:294 2 locks held by syz-executor.4/17416: #0: ffff88802d27e410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x1c16/0x25f0 kernel/signal.c:2863 #1: ffff88803f0d8400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff88803f0d8400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb4/0x3d0 fs/ext4/file.c:294 2 locks held by syz-executor.3/17421: #0: ffff88802d27e410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x1c16/0x25f0 kernel/signal.c:2863 #1: ffff88803f0dac00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff88803f0dac00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb4/0x3d0 fs/ext4/file.c:294 2 locks held by syz-executor.0/17429: #0: ffff88802d27e410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x1c16/0x25f0 kernel/signal.c:2863 #1: ffff88803b82ca00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff88803b82ca00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb4/0x3d0 fs/ext4/file.c:294 2 locks held by syz-executor.5/17431: #0: ffff88802d27e410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x1c16/0x25f0 kernel/signal.c:2863 #1: ffff888083e74000 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff888083e74000 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb4/0x3d0 fs/ext4/file.c:294 2 locks held by syz-executor.2/17432: #0: ffff88802d27e410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x1c16/0x25f0 kernel/signal.c:2863 #1: ffff88803b82de00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff88803b82de00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb4/0x3d0 fs/ext4/file.c:294 2 locks held by syz-executor.1/17433: #0: ffff88802d27e410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x1c16/0x25f0 kernel/signal.c:2863 #1: ffff88803b828e00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff88803b828e00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb4/0x3d0 fs/ext4/file.c:294 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.4.0-syzkaller-11479-g6cd06ab12d1a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 nmi_cpu_backtrace+0x29c/0x350 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x2a4/0x300 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline] watchdog+0xe16/0x1090 kernel/hung_task.c:379 kthread+0x344/0x440 kernel/kthread.c:389 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 17326 Comm: syz-executor.5 Not tainted 6.4.0-syzkaller-11479-g6cd06ab12d1a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 RIP: 0010:crc_pcl+0xc60/0x12e0 arch/x86/crypto/crc32c-pcl-intel-asm_64.S:203 Code: 0f 38 f1 81 b8 fe ff ff f2 4c 0f 38 f1 8a b8 fe ff ff f2 4d 0f 38 f1 93 b8 fe ff ff f3 0f 1e fa f2 4c 0f 38 f1 81 c0 fe ff ff 4c 0f 38 f1 8a c0 fe ff ff f2 4d 0f 38 f1 93 c0 fe ff ff f3 0f RSP: 0018:ffffc900035de608 EFLAGS: 00000246 RAX: 0000000000000080 RBX: 0000000000001000 RCX: ffff88807fc73400 RDX: ffff88807fc73800 RSI: 0000000000001000 RDI: 0000000000000000 RBP: 0000000000001000 R08: 000000006775bf83 R09: 00000000d55e0c75 R10: 000000001f34b7db R11: ffff88807fc73c00 R12: ffffc900035de6e0 R13: ffff88807fc73000 R14: 0000000000000000 R15: 0000000000000004 FS: 00007f7e4b49a700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc8bf9ad988 CR3: 000000001e90b000 CR4: 0000000000350ef0 Call Trace: crc32c_pcl_intel_update arch/x86/crypto/crc32c-intel_glue.c:162 [inline] crc32c_pcl_intel_update+0x28a/0x320 arch/x86/crypto/crc32c-intel_glue.c:151 crypto_shash_update+0xc8/0x120 crypto/shash.c:134 ext4_chksum fs/ext4/ext4.h:2458 [inline] ext4_block_bitmap_csum_set+0x21b/0x3b0 fs/ext4/bitmap.c:91 ext4_mb_mark_diskspace_used+0x857/0x1670 fs/ext4/mballoc.c:4039 ext4_mb_new_blocks+0x8e2/0x4990 fs/ext4/mballoc.c:6152 ext4_ext_map_blocks+0x1fdd/0x5bc0 fs/ext4/extents.c:4285 ext4_map_blocks+0x760/0x1890 fs/ext4/inode.c:621 _ext4_get_block+0x241/0x580 fs/ext4/inode.c:763 ext4_block_write_begin+0x3be/0xdd0 fs/ext4/inode.c:1043 ext4_write_begin+0x5be/0x1030 fs/ext4/inode.c:1183 ext4_da_write_begin+0x223/0x8c0 fs/ext4/inode.c:2867 generic_perform_write+0x26b/0x5d0 mm/filemap.c:3923 ext4_buffered_write_iter+0x123/0x3d0 fs/ext4/file.c:299 ext4_file_write_iter+0x8f2/0x1880 fs/ext4/file.c:722 __kernel_write_iter+0x262/0x7e0 fs/read_write.c:517 dump_emit_page fs/coredump.c:888 [inline] dump_user_range+0x23c/0x710 fs/coredump.c:915 elf_core_dump+0x27f4/0x3790 fs/binfmt_elf.c:2142 do_coredump+0x2f44/0x4050 fs/coredump.c:764 get_signal+0x1c16/0x25f0 kernel/signal.c:2863 arch_do_signal_or_restart+0x79/0x5c0 arch/x86/kernel/signal.c:308 exit_to_user_mode_loop kernel/entry/common.c:168 [inline] exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204 irqentry_exit_to_user_mode+0x9/0x40 kernel/entry/common.c:310 exc_page_fault+0xc0/0x170 arch/x86/mm/fault.c:1545 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 RIP: 0033:0x430a Code: Unable to access opcode bytes at 0x42e0. RSP: 002b:0000000020000088 EFLAGS: 00010217 RAX: 0000000000000000 RBX: 00007f7e4a7abf80 RCX: 00007f7e4a68c389 RDX: 00000000200000c0 RSI: 0000000020000080 RDI: 0000000080220000 RBP: 00007f7e4a6d7493 R08: 0000000020000140 R09: 0000000020000140 R10: 0000000020000100 R11: 0000000000000206 R12: 0000000000000000 R13: 00007ffe76bbc21f R14: 00007f7e4b49a300 R15: 0000000000022000