INFO: task syz-executor.2:26864 blocked for more than 143 seconds. Not tainted 6.5.0-rc5-syzkaller-00056-gcacc6e22932f #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:24688 pid:26864 ppid:7972 flags:0x00004002 Call Trace: context_switch kernel/sched/core.c:5381 [inline] __schedule+0xee1/0x59f0 kernel/sched/core.c:6710 schedule+0xe7/0x1b0 kernel/sched/core.c:6786 wb_wait_for_completion+0x1ae/0x270 fs/fs-writeback.c:192 __writeback_inodes_sb_nr+0x1d8/0x270 fs/fs-writeback.c:2650 try_to_writeback_inodes_sb+0x97/0xc0 fs/fs-writeback.c:2698 ext4_nonda_switch+0x1a9/0x1f0 fs/ext4/inode.c:2838 ext4_da_write_begin+0x16e/0x8c0 fs/ext4/inode.c:2865 generic_perform_write+0x278/0x600 mm/filemap.c:3923 ext4_buffered_write_iter+0x11f/0x3c0 fs/ext4/file.c:299 ext4_file_write_iter+0x7ee/0x1950 fs/ext4/file.c:722 __kernel_write_iter+0x261/0x7e0 fs/read_write.c:517 dump_emit_page fs/coredump.c:888 [inline] dump_user_range+0x299/0x790 fs/coredump.c:915 elf_core_dump+0x2721/0x38e0 fs/binfmt_elf.c:2142 do_coredump+0x2c96/0x3fc0 fs/coredump.c:764 get_signal+0x2464/0x2770 kernel/signal.c:2867 arch_do_signal_or_restart+0x89/0x5f0 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 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 RIP: 0033:0x150a21 RSP: 002b:0000000020000588 EFLAGS: 00010217 RAX: 0000000000000000 RBX: 00007f595df9bf80 RCX: 00007f595de7cae9 RDX: 00000000200005c0 RSI: 0000000020000580 RDI: 0000000040000000 RBP: 00007f595dec847a R08: 0000000020000640 R09: 0000000020000640 R10: 0000000020000600 R11: 0000000000000206 R12: 0000000000000000 R13: 000000000000000b R14: 00007f595df9bf80 R15: 00007ffcf98f7f68 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/13: #0: ffffffff8c9a66b0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x2c/0xe20 kernel/rcu/tasks.h:522 1 lock held by rcu_tasks_trace/14: #0: ffffffff8c9a63b0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x2c/0xe20 kernel/rcu/tasks.h:522 1 lock held by khungtaskd/28: #0: ffffffff8c9a72c0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x340 kernel/locking/lockdep.c:6615 4 locks held by kworker/u4:2/38: #0: ffff888014667938 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:20 [inline] #0: ffff888014667938 ((wq_completion)netns){+.+.}-{0:0}, at: raw_atomic64_set include/linux/atomic/atomic-arch-fallback.h:2608 [inline] #0: ffff888014667938 ((wq_completion)netns){+.+.}-{0:0}, at: raw_atomic_long_set include/linux/atomic/atomic-long.h:79 [inline] #0: ffff888014667938 ((wq_completion)netns){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:3196 [inline] #0: ffff888014667938 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:678 [inline] #0: ffff888014667938 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:705 [inline] #0: ffff888014667938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x96a/0x16f0 kernel/workqueue.c:2570 #1: ffffc90000af7d80 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x99e/0x16f0 kernel/workqueue.c:2574 #2: ffffffff8e3cbd50 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x9f/0xb20 net/core/net_namespace.c:576 #3: ffffffff8e3e0d28 (rtnl_mutex){+.+.}-{3:3}, at: sit_exit_batch_net+0x8c/0x580 net/ipv6/sit.c:1883 1 lock held by syslogd/4458: #0: ffff8880b993c3d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:558 2 locks held by getty/4775: #0: ffff888028d0a098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc900015c02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfcb/0x1480 drivers/tty/n_tty.c:2187 3 locks held by kworker/u4:0/22906: #0: ffff888140074938 ((wq_completion)writeback){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:20 [inline] #0: ffff888140074938 ((wq_completion)writeback){+.+.}-{0:0}, at: raw_atomic64_set include/linux/atomic/atomic-arch-fallback.h:2608 [inline] #0: ffff888140074938 ((wq_completion)writeback){+.+.}-{0:0}, at: raw_atomic_long_set include/linux/atomic/atomic-long.h:79 [inline] #0: ffff888140074938 ((wq_completion)writeback){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:3196 [inline] #0: ffff888140074938 ((wq_completion)writeback){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:678 [inline] #0: ffff888140074938 ((wq_completion)writeback){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:705 [inline] #0: ffff888140074938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x96a/0x16f0 kernel/workqueue.c:2570 #1: ffffc9000bc87d80 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x99e/0x16f0 kernel/workqueue.c:2574 #2: ffff88802d030bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553 3 locks held by syz-executor.1/9307: #0: ffff88814bb16410 (sb_writers#4){.+.+}-{0:0}, at: do_unlinkat+0x1ca/0x6d0 fs/namei.c:4376 #1: ffff8880462c0400 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:806 [inline] #1: ffff8880462c0400 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: do_unlinkat+0x27c/0x6d0 fs/namei.c:4380 #2: ffff888078745e00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #2: ffff888078745e00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: vfs_unlink+0xd3/0x900 fs/namei.c:4318 5 locks held by kworker/u4:1/23774: #0: ffff8880b993c3d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:558 #1: ffffc9000ec8fd80 ((work_completion)(&(&forw_packet_aggr->delayed_work)->work)){+.+.}-{0:0}, at: process_one_work+0x99e/0x16f0 kernel/workqueue.c:2574 #2: ffff8880b9828848 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_change+0x1b0/0x2e0 kernel/sched/psi.c:923 #3: ffffffff8c9a72c0 (rcu_read_lock){....}-{1:2}, at: page_pgdat include/linux/mm.h:1814 [inline] #3: ffffffff8c9a72c0 (rcu_read_lock){....}-{1:2}, at: __mod_lruvec_page_state+0x8b/0x420 mm/memcontrol.c:856 #4: ffff88802220a2d0 (key#12){..-.}-{2:2}, at: percpu_counter_add_batch+0x142/0x1f0 lib/percpu_counter.c:95 2 locks held by syz-executor.3/26586: #0: ffff88807c818348 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe7/0x170 fs/file.c:1062 #1: ffff88804368b600 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: iterate_dir+0xe4/0x5f0 fs/readdir.c:99 3 locks held by syz-executor.2/26864: #0: ffff88814bb16410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2464/0x2770 kernel/signal.c:2867 #1: ffff88803941ac00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff88803941ac00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3c0 fs/ext4/file.c:294 #2: ffff88814bb160e0 (&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.3/27358: #0: ffff88802d030bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553 1 lock held by syz-executor.0/27384: #0: ffff88814bb16600 (sb_internal){.+.+}-{0:0}, at: evict+0x2ed/0x6b0 fs/inode.c:665 1 lock held by syz-executor.2/27391: #0: ffff88814bb16600 (sb_internal){.+.+}-{0:0}, at: evict+0x2ed/0x6b0 fs/inode.c:665 1 lock held by syz-executor.2/27396: #0: ffff88802d030bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553 1 lock held by syz-executor.2/27472: #0: ffff88802d030bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553 1 lock held by syz-executor.3/27475: #0: ffff88802d030bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553 1 lock held by syz-executor.2/27478: #0: ffff88802d030bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553 1 lock held by syz-executor.1/27642: #0: ffff88802d030bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553 1 lock held by syz-executor.4/27707: #0: ffff88802d030bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553 1 lock held by syz-executor.1/27728: #0: ffff88802d030bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553 1 lock held by syz-executor.0/27764: #0: ffff88802d030bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553 1 lock held by syz-executor.1/27797: #0: ffff88802d030bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553 1 lock held by syz-executor.0/27806: #0: ffff88802d030bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553 1 lock held by syz-executor.1/27838: #0: ffff88802d030bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553 1 lock held by syz-executor.0/27841: #0: ffff88802d030bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553 1 lock held by syz-executor.0/27872: #0: ffff88802d030bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553 1 lock held by syz-executor.1/27947: #0: ffff88802d030bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553 1 lock held by syz-executor.0/28194: #0: ffff88802d030bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553 1 lock held by syz-executor.1/28196: #0: ffff88802d030bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553 3 locks held by kworker/1:37/28226: #0: ffff888012870d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:20 [inline] #0: ffff888012870d38 ((wq_completion)events){+.+.}-{0:0}, at: raw_atomic64_set include/linux/atomic/atomic-arch-fallback.h:2608 [inline] #0: ffff888012870d38 ((wq_completion)events){+.+.}-{0:0}, at: raw_atomic_long_set include/linux/atomic/atomic-long.h:79 [inline] #0: ffff888012870d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:3196 [inline] #0: ffff888012870d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:678 [inline] #0: ffff888012870d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:705 [inline] #0: ffff888012870d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x96a/0x16f0 kernel/workqueue.c:2570 #1: ffffc90006a4fd80 (free_ipc_work){+.+.}-{0:0}, at: process_one_work+0x99e/0x16f0 kernel/workqueue.c:2574 #2: ffffffff8c9b2778 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:325 [inline] #2: ffffffff8c9b2778 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x404/0x7e0 kernel/rcu/tree_exp.h:992 2 locks held by kworker/1:40/28229: #0: ffff888012872538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:20 [inline] #0: ffff888012872538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: raw_atomic64_set include/linux/atomic/atomic-arch-fallback.h:2608 [inline] #0: ffff888012872538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: raw_atomic_long_set include/linux/atomic/atomic-long.h:79 [inline] #0: ffff888012872538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:3196 [inline] #0: ffff888012872538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:678 [inline] #0: ffff888012872538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:705 [inline] #0: ffff888012872538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x96a/0x16f0 kernel/workqueue.c:2570 #1: ffffc90006a7fd80 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x99e/0x16f0 kernel/workqueue.c:2574 1 lock held by syz-executor.0/28245: #0: ffff88802d030bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553 2 locks held by syz-executor.0/28267: #0: ffff88814bb16410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2464/0x2770 kernel/signal.c:2867 #1: ffff88809a472c00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff88809a472c00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3c0 fs/ext4/file.c:294 2 locks held by syz-executor.0/28291: #0: ffff88802d030bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553 #1: ffff88802d032988 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x10e7/0x1600 fs/jbd2/transaction.c:461 2 locks held by syz-executor.1/28300: #0: ffff88814bb16410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2464/0x2770 kernel/signal.c:2867 #1: ffff888082075400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff888082075400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3c0 fs/ext4/file.c:294 2 locks held by syz-executor.0/28336: #0: ffff88814bb16410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2464/0x2770 kernel/signal.c:2867 #1: ffff88803bb05400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff88803bb05400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3c0 fs/ext4/file.c:294 2 locks held by syz-executor.1/28338: #0: ffff88814bb16410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2464/0x2770 kernel/signal.c:2867 #1: ffff88804eaa0e00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff88804eaa0e00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3c0 fs/ext4/file.c:294 2 locks held by syz-executor.1/28372: #0: ffff88814bb16410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2464/0x2770 kernel/signal.c:2867 #1: ffff8880395f7200 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff8880395f7200 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3c0 fs/ext4/file.c:294 2 locks held by syz-executor.0/28401: #0: ffff88814bb16410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2464/0x2770 kernel/signal.c:2867 #1: ffff88809a252c00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff88809a252c00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3c0 fs/ext4/file.c:294 2 locks held by syz-executor.1/28403: #0: ffff88814bb16410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2464/0x2770 kernel/signal.c:2867 #1: ffff88809a255400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff88809a255400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3c0 fs/ext4/file.c:294 2 locks held by syz-executor.4/28433: #0: ffff88814bb16410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2464/0x2770 kernel/signal.c:2867 #1: ffff888078746800 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff888078746800 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3c0 fs/ext4/file.c:294 2 locks held by syz-executor.0/28437: #0: ffff88814bb16410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2464/0x2770 kernel/signal.c:2867 #1: ffff888078744000 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff888078744000 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3c0 fs/ext4/file.c:294 2 locks held by syz-executor.1/28439: #0: ffff88814bb16410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2464/0x2770 kernel/signal.c:2867 #1: ffff88804cf5e800 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff88804cf5e800 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3c0 fs/ext4/file.c:294 2 locks held by syz-executor.4/28454: #0: ffff88814bb16410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2464/0x2770 kernel/signal.c:2867 #1: ffff88803ba4d400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff88803ba4d400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3c0 fs/ext4/file.c:294 3 locks held by syz-executor.5/28467: #0: ffff88802d030bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553 #1: ffff88802d032988 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x10e7/0x1600 fs/jbd2/transaction.c:461 #2: ffff8880396e2088 (&ei->i_data_sem){++++}-{3:3}, at: ext4_map_blocks+0x5a7/0x1770 fs/ext4/inode.c:614 2 locks held by syz-executor.4/28484: #0: ffff88814bb16410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2464/0x2770 kernel/signal.c:2867 #1: ffff88804e35ca00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff88804e35ca00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3c0 fs/ext4/file.c:294 2 locks held by syz-executor.0/28488: #0: ffff88814bb16410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2464/0x2770 kernel/signal.c:2867 #1: ffff88803b8b8400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff88803b8b8400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3c0 fs/ext4/file.c:294 2 locks held by syz-executor.1/28490: #0: ffff88814bb16410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2464/0x2770 kernel/signal.c:2867 #1: ffff8880395f0400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff8880395f0400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3c0 fs/ext4/file.c:294 2 locks held by syz-executor.4/28515: #0: ffff88814bb16410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2464/0x2770 kernel/signal.c:2867 #1: ffff88803bb7a200 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff88803bb7a200 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3c0 fs/ext4/file.c:294 2 locks held by syz-executor.1/28528: #0: ffff88814bb16410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2464/0x2770 kernel/signal.c:2867 #1: ffff88804eaa3600 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff88804eaa3600 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3c0 fs/ext4/file.c:294 2 locks held by syz-executor.3/28548: #0: ffff88814bb16410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2464/0x2770 kernel/signal.c:2867 #1: ffff888039418e00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff888039418e00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3c0 fs/ext4/file.c:294 2 locks held by syz-executor.4/28569: #0: ffff88814bb16410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2464/0x2770 kernel/signal.c:2867 #1: ffff8880326c4000 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff8880326c4000 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3c0 fs/ext4/file.c:294 2 locks held by syz-executor.3/28571: #0: ffff88814bb16410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2464/0x2770 kernel/signal.c:2867 #1: ffff888039535e00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff888039535e00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3c0 fs/ext4/file.c:294 4 locks held by syz-executor.0/28574: #0: ffff88814bb16410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2464/0x2770 kernel/signal.c:2867 #1: ffff8880326c4a00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff8880326c4a00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3c0 fs/ext4/file.c:294 #2: ffff88802d032988 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x10e7/0x1600 fs/jbd2/transaction.c:461 #3: ffff8880326c4888 (&ei->i_data_sem){++++}-{3:3}, at: ext4_map_blocks+0x5a7/0x1770 fs/ext4/inode.c:614 2 locks held by syz-executor.1/28575: #0: ffff88814bb16410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2464/0x2770 kernel/signal.c:2867 #1: ffff88805148c000 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff88805148c000 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3c0 fs/ext4/file.c:294 2 locks held by syz-executor.3/28615: #0: ffff88814bb16410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2464/0x2770 kernel/signal.c:2867 #1: ffff8880396e1800 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff8880396e1800 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3c0 fs/ext4/file.c:294 2 locks held by syz-executor.1/28620: #0: ffff88814bb16410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2464/0x2770 kernel/signal.c:2867 #1: ffff888078745e00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff888078745e00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3c0 fs/ext4/file.c:294 3 locks held by syz-executor.3/28629: #0: ffff88814bb16410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2464/0x2770 kernel/signal.c:2867 #1: ffff88804368c000 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff88804368c000 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3c0 fs/ext4/file.c:294 #2: ffff88802d032988 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x10e7/0x1600 fs/jbd2/transaction.c:461 3 locks held by syz-executor.3/28637: #0: ffff88814bb16410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2464/0x2770 kernel/signal.c:2867 #1: ffff88804368e800 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff88804368e800 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3c0 fs/ext4/file.c:294 #2: ffff88802d032988 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x10e7/0x1600 fs/jbd2/transaction.c:461 2 locks held by syz-executor.5/28641: #0: ffffffff8e3cbd50 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2d5/0x670 net/core/net_namespace.c:487 #1: ffffffff8e3e0d28 (rtnl_mutex){+.+.}-{3:3}, at: ip_tunnel_init_net+0x225/0x5e0 net/ipv4/ip_tunnel.c:1090 2 locks held by syz-executor.5/28644: 3 locks held by syz-executor.0/28648: 2 locks held by syz-executor.4/28650: 2 locks held by syz-executor.0/28657: #0: ffffffff8e3cbd50 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2d5/0x670 net/core/net_namespace.c:487 #1: ffffffff8e3e0d28 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline] #1: ffffffff8e3e0d28 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x136/0x230 net/smc/smc_pnet.c:878 3 locks held by syz-executor.5/28654: 1 lock held by syz-executor.2/28658: #0: ffffffff8e3e0d28 (rtnl_mutex){+.+.}-{3:3}, at: dev_ifconf+0x19d/0x380 net/core/dev_ioctl.c:66 2 locks held by syz-executor.3/28656: 2 locks held by syz-executor.4/28663: #0: ffffffff8e3cbd50 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2d5/0x670 net/core/net_namespace.c:487 #1: ffffffff8e3e0d28 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline] #1: ffffffff8e3e0d28 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x136/0x230 net/smc/smc_pnet.c:878 1 lock held by syz-executor.3/28668: #0: ffff8880b983c3d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:558 2 locks held by syz-executor.3/28670: ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.5.0-rc5-syzkaller-00056-gcacc6e22932f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 nmi_cpu_backtrace+0x277/0x380 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x2ac/0x310 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+0xf29/0x11b0 kernel/hung_task.c:379 kthread+0x33a/0x430 kernel/kthread.c:389 ret_from_fork+0x2c/0x70 arch/x86/kernel/process.c:145 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 28672 Comm: syz-executor.3 Not tainted 6.5.0-rc5-syzkaller-00056-gcacc6e22932f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:200 Code: a6 1a 99 02 66 0f 1f 44 00 00 f3 0f 1e fa 48 8b be b0 01 00 00 e8 b0 ff ff ff 31 c0 c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 0f 1e fa 65 8b 05 dd b0 7d 7e 89 c1 48 8b 34 24 81 e1 00 01 00 RSP: 0018:ffffc9000ea9f0a0 EFLAGS: 00000206 RAX: 0000000000000000 RBX: 000000000000000f RCX: ffffffff8a1ff451 RDX: ffff88802bc89dc0 RSI: 0000000000000000 RDI: 0000000000000007 RBP: 00007f97209fffff R08: 0000000000000007 R09: 0000000000000000 R10: 00007f97209fffff R11: 0000000000094011 R12: ffff888058a43008 R13: 000000000000000e R14: 0000000000000000 R15: 00007f97209fffff FS: 00007f9721b526c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555555b6e938 CR3: 00000000775b3000 CR4: 0000000000350ee0 Call Trace: ma_data_end lib/maple_tree.c:1462 [inline] ma_data_end lib/maple_tree.c:1445 [inline] mtree_range_walk+0x6bc/0x9a0 lib/maple_tree.c:2953 mas_state_walk lib/maple_tree.c:3869 [inline] mt_find+0x4ce/0x910 lib/maple_tree.c:6492 find_vma+0x10e/0x1b0 mm/mmap.c:1866 gup_vma_lookup+0x24/0x220 mm/gup.c:1108 __get_user_pages+0x28c/0x1010 mm/gup.c:1210 __get_user_pages_locked mm/gup.c:1487 [inline] get_dump_page+0x108/0x210 mm/gup.c:2001 dump_user_range+0x45b/0x790 fs/coredump.c:913 elf_core_dump+0x2721/0x38e0 fs/binfmt_elf.c:2142 do_coredump+0x2c96/0x3fc0 fs/coredump.c:764 get_signal+0x2464/0x2770 kernel/signal.c:2867 arch_do_signal_or_restart+0x89/0x5f0 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 asm_exc_general_protection+0x26/0x30 arch/x86/include/asm/idtentry.h:564 RIP: 0033:0x7f9720e7caf1 Code: c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 48 3d 01 f0 ff ff 73 01 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f RSP: 002b:0000000020000140 EFLAGS: 00010217 RAX: 0000000000000000 RBX: 00007f9720f9bf80 RCX: 00007f9720e7cae9 RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000000 RBP: 00007f9720ec847a R08: 0000000020000200 R09: 0000000020000200 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f9720f9bf80 R15: 00007ffeac7946a8