INFO: task syz-executor.1:26957 blocked for more than 143 seconds. Not tainted 6.6.0-rc4-syzkaller-00012-gce36c8b14987 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:23472 pid:26957 ppid:17721 flags:0x00004002 Call Trace: context_switch kernel/sched/core.c:5382 [inline] __schedule+0xee1/0x5a10 kernel/sched/core.c:6695 schedule+0xe7/0x1b0 kernel/sched/core.c:6771 wb_wait_for_completion+0x1ae/0x270 fs/fs-writeback.c:192 __writeback_inodes_sb_nr+0x1d8/0x270 fs/fs-writeback.c:2655 try_to_writeback_inodes_sb+0x97/0xc0 fs/fs-writeback.c:2703 ext4_nonda_switch+0x1a9/0x1f0 fs/ext4/inode.c:2836 ext4_da_write_begin+0x16e/0x8c0 fs/ext4/inode.c:2863 generic_perform_write+0x278/0x600 mm/filemap.c:3969 ext4_buffered_write_iter+0x11f/0x3c0 fs/ext4/file.c:299 ext4_file_write_iter+0x7f7/0x1860 fs/ext4/file.c:717 __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+0x2700/0x3900 fs/binfmt_elf.c:2142 do_coredump+0x2c96/0x3fc0 fs/coredump.c:764 get_signal+0x2434/0x2790 kernel/signal.c:2878 arch_do_signal_or_restart+0x90/0x7f0 arch/x86/kernel/signal.c:309 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:309 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 RIP: 0033:0x0 RSP: 002b:0000000020000188 EFLAGS: 00010217 RAX: 0000000000000000 RBX: 00007f903499bf80 RCX: 00007f903487cae9 RDX: 0000000020000200 RSI: 0000000020000180 RDI: 0000000000008400 RBP: 00007f90348c847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 000000000000000b R14: 00007f903499bf80 R15: 00007ffc8be31ff8 Showing all locks held in the system: 4 locks held by kworker/u4:0/11: #0: ffff888140068138 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605 #1: ffffc90000107d80 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606 #2: ffff888025d220e0 (&type->s_umount_key#32){++++}-{3:3}, at: super_trylock_shared+0x1e/0xf0 fs/super.c:607 #3: ffff888025d24bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553 1 lock held by khungtaskd/29: #0: ffffffff8cbab2a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:303 [inline] #0: ffffffff8cbab2a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:749 [inline] #0: ffffffff8cbab2a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6613 2 locks held by getty/4794: #0: ffff8880260830a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc900031232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc5/0x1480 drivers/tty/n_tty.c:2206 2 locks held by syz-executor.1/26957: #0: ffff888025d22410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2434/0x2790 kernel/signal.c:2878 #1: ffff888048634a00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #1: ffff888048634a00 (&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.0/27728: #0: ffff888025d22410 (sb_writers#4){.+.+}-{0:0}, at: do_unlinkat+0x1ca/0x6d0 fs/namei.c:4379 #1: ffff88803500ca00 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:837 [inline] #1: ffff88803500ca00 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: do_unlinkat+0x27c/0x6d0 fs/namei.c:4383 #2: ffff88803d7a8e00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #2: ffff88803d7a8e00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: vfs_unlink+0xd3/0x900 fs/namei.c:4321 3 locks held by syz-executor.5/30397: #0: ffff888025d22410 (sb_writers#4){.+.+}-{0:0}, at: do_unlinkat+0x1ca/0x6d0 fs/namei.c:4379 #1: ffff88803d7ade00 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:837 [inline] #1: ffff88803d7ade00 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: do_unlinkat+0x27c/0x6d0 fs/namei.c:4383 #2: ffff888041f7ac00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #2: ffff888041f7ac00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: vfs_unlink+0xd3/0x900 fs/namei.c:4321 1 lock held by syz-executor.5/32597: 1 lock held by syz-executor.0/32654: #0: ffff888025d24bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553 1 lock held by syz-executor.1/32665: #0: ffff888025d24bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553 1 lock held by syz-executor.3/32678: #0: ffff888025d24bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553 1 lock held by syz-executor.0/32709: #0: ffff888025d24bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553 1 lock held by syz-executor.5/32733: #0: ffff888025d24bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553 1 lock held by syz-executor.1/874: #0: ffff888025d24bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553 1 lock held by syz-executor.5/892: #0: ffff888025d24bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553 1 lock held by syz-executor.0/896: #0: ffff888025d24bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553 3 locks held by syz-executor.2/978: #0: ffff888025d22410 (sb_writers#4){.+.+}-{0:0}, at: do_unlinkat+0x1ca/0x6d0 fs/namei.c:4379 #1: ffff88804449c000 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:837 [inline] #1: ffff88804449c000 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: do_unlinkat+0x27c/0x6d0 fs/namei.c:4383 #2: ffff88803d7ae800 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #2: ffff88803d7ae800 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: vfs_unlink+0xd3/0x900 fs/namei.c:4321 1 lock held by syz-executor.0/1108: #0: ffff888025d24bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553 1 lock held by syz-executor.5/1141: #0: ffff888025d24bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553 1 lock held by syz-executor.1/1139: #0: ffff888025d24bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553 1 lock held by syz-executor.0/1186: #0: ffff888025d24bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553 1 lock held by syz-executor.0/1189: #0: ffff888025d24bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553 1 lock held by syz-executor.0/1192: #0: ffff888025d24bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553 1 lock held by syz-executor.1/1209: #0: ffff888025d24bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553 1 lock held by syz-executor.5/1212: #0: ffff888025d24bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553 3 locks held by syz-executor.2/1215: #0: ffff888025d24bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553 #1: ffff888025c7a988 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x10d6/0x15e0 fs/jbd2/transaction.c:463 #2: ffff88803c7f9688 (&ei->i_data_sem){++++}-{3:3}, at: ext4_map_blocks+0x5a7/0x1770 fs/ext4/inode.c:614 1 lock held by syz-executor.2/1398: #0: ffff888025d24bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553 3 locks held by syz-executor.1/1734: #0: ffff888025d24bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553 #1: ffff888025c7a988 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x10d6/0x15e0 fs/jbd2/transaction.c:463 #2: ffff888077bb4888 (&ei->i_data_sem){++++}-{3:3}, at: ext4_map_blocks+0x5a7/0x1770 fs/ext4/inode.c:614 3 locks held by syz-executor.2/1743: #0: ffff888025d24bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553 #1: ffff888025c7a988 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x10d6/0x15e0 fs/jbd2/transaction.c:463 #2: ffff88803c7fe688 (&ei->i_data_sem){++++}-{3:3}, at: ext4_map_blocks+0x5a7/0x1770 fs/ext4/inode.c:614 3 locks held by syz-executor.5/1745: #0: ffff888025d24bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553 #1: ffff888025c7a988 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x10d6/0x15e0 fs/jbd2/transaction.c:463 #2: ffff888074cfbe88 (&ei->i_data_sem){++++}-{3:3}, at: ext4_map_blocks+0x5a7/0x1770 fs/ext4/inode.c:614 3 locks held by syz-executor.1/1749: #0: ffff888025d24bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553 #1: ffff888025c7a988 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x10d6/0x15e0 fs/jbd2/transaction.c:463 #2: ffff88805648be88 (&ei->i_data_sem){++++}-{3:3}, at: ext4_map_blocks+0x5a7/0x1770 fs/ext4/inode.c:614 1 lock held by syz-executor.2/1755: #0: ffff888025d24bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553 3 locks held by syz-executor.5/1761: #0: ffff888025d24bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553 #1: ffff888025c7a988 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x10d6/0x15e0 fs/jbd2/transaction.c:463 #2: ffff88803500dc88 (&ei->i_data_sem){++++}-{3:3}, at: ext4_map_blocks+0x5a7/0x1770 fs/ext4/inode.c:614 3 locks held by syz-executor.3/1763: #0: ffff888025d22410 (sb_writers#4){.+.+}-{0:0}, at: do_unlinkat+0x1ca/0x6d0 fs/namei.c:4379 #1: ffff88804449a200 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:837 [inline] #1: ffff88804449a200 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: do_unlinkat+0x27c/0x6d0 fs/namei.c:4383 #2: ffff8880353ef200 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #2: ffff8880353ef200 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: vfs_unlink+0xd3/0x900 fs/namei.c:4321 3 locks held by syz-executor.4/1765: #0: ffff888025d22410 (sb_writers#4){.+.+}-{0:0}, at: do_unlinkat+0x1ca/0x6d0 fs/namei.c:4379 #1: ffff88803d7ac000 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:837 [inline] #1: ffff88803d7ac000 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: do_unlinkat+0x27c/0x6d0 fs/namei.c:4383 #2: ffff888041f79800 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #2: ffff888041f79800 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: vfs_unlink+0xd3/0x900 fs/namei.c:4321 2 locks held by syz-executor.3/1893: #0: ffff888025d22410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2434/0x2790 kernel/signal.c:2878 #1: ffff88803f0c6800 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #1: ffff88803f0c6800 (&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.4/1900: #0: ffff888025d22410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2434/0x2790 kernel/signal.c:2878 #1: ffff88803f0c7200 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #1: ffff88803f0c7200 (&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.5/1912: #0: ffff888025d22410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2434/0x2790 kernel/signal.c:2878 #1: ffff888038a77200 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #1: ffff888038a77200 (&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.2/1915: #0: ffff888025d22410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2434/0x2790 kernel/signal.c:2878 #1: ffff88803f0c0e00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #1: ffff88803f0c0e00 (&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.1/1918: #0: ffff888025d22410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2434/0x2790 kernel/signal.c:2878 #1: ffff88803c5bc000 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #1: ffff88803c5bc000 (&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.4/1922: #0: ffff888025d22410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2434/0x2790 kernel/signal.c:2878 #1: ffff88803c5bf200 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #1: ffff88803c5bf200 (&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.3/1923: #0: ffff888025d22410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2434/0x2790 kernel/signal.c:2878 #1: ffff88803c5b9800 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #1: ffff88803c5b9800 (&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.0/1928: #0: ffff888025d22410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2434/0x2790 kernel/signal.c:2878 #1: ffff88805643f200 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #1: ffff88805643f200 (&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.5/1940: #0: ffff888025d22410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2434/0x2790 kernel/signal.c:2878 #1: ffff888044d45400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #1: ffff888044d45400 (&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.1/1948: #0: ffff888025d22410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2434/0x2790 kernel/signal.c:2878 #1: ffff888044d40400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #1: ffff888044d40400 (&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.3/1949: #0: ffff888025d22410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2434/0x2790 kernel/signal.c:2878 #1: ffff888074e87200 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #1: ffff888074e87200 (&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.0/1971: #0: ffff888025d22410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2434/0x2790 kernel/signal.c:2878 #1: ffff88805418e800 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #1: ffff88805418e800 (&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.4/1967: #0: ffff888025d22410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2434/0x2790 kernel/signal.c:2878 #1: ffff8880565ed400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #1: ffff8880565ed400 (&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.3/1985: #0: ffff888025d22410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2434/0x2790 kernel/signal.c:2878 #1: ffff888056453600 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #1: ffff888056453600 (&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.1/1989: #0: ffff888025d22410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2434/0x2790 kernel/signal.c:2878 #1: ffff888048630e00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #1: ffff888048630e00 (&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.5/1993: #0: ffff888025d22410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2434/0x2790 kernel/signal.c:2878 #1: ffff888056455400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #1: ffff888056455400 (&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.2/1992: #0: ffff888025d22410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2434/0x2790 kernel/signal.c:2878 #1: ffff888056452200 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #1: ffff888056452200 (&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.0/2007: #0: ffff888025d22410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2434/0x2790 kernel/signal.c:2878 #1: ffff888082529800 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #1: ffff888082529800 (&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.4/2014: #0: ffff888025d22410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2434/0x2790 kernel/signal.c:2878 #1: ffff88802f798e00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #1: ffff88802f798e00 (&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.1/2025: #0: ffff888025d22410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2434/0x2790 kernel/signal.c:2878 #1: ffff88802f79c000 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #1: ffff88802f79c000 (&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.2/2026: #0: ffff888025d22410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2434/0x2790 kernel/signal.c:2878 #1: ffff88802f79b600 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #1: ffff88802f79b600 (&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.3/2036: #0: ffff888025d22410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2434/0x2790 kernel/signal.c:2878 #1: ffff888056796800 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #1: ffff888056796800 (&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.5/2048: #0: ffff888025d22410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2434/0x2790 kernel/signal.c:2878 #1: ffff888056797200 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #1: ffff888056797200 (&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.0/2164: #0: ffff888025d22410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2434/0x2790 kernel/signal.c:2878 #1: ffff888056793600 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #1: ffff888056793600 (&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.2/2186: #0: ffff888025d22410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2434/0x2790 kernel/signal.c:2878 #1: ffff888038814000 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #1: ffff888038814000 (&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.3/2190: #0: ffff888025d22410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2434/0x2790 kernel/signal.c:2878 #1: ffff88803500ac00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #1: ffff88803500ac00 (&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.1/2197: #0: ffff888025d22410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2434/0x2790 kernel/signal.c:2878 #1: ffff88803d7a8400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #1: ffff88803d7a8400 (&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.5/2203: #0: ffff888025d22410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2434/0x2790 kernel/signal.c:2878 #1: ffff888038810400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #1: ffff888038810400 (&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.4/2202: #0: ffff888025d22410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2434/0x2790 kernel/signal.c:2878 #1: ffff88804449f200 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #1: ffff88804449f200 (&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.0/2217: #0: ffff888025d22410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2434/0x2790 kernel/signal.c:2878 #1: ffff88803d7a8e00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #1: ffff88803d7a8e00 (&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.2/2238: #0: ffff888025d22410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2434/0x2790 kernel/signal.c:2878 #1: ffff88803d7ae800 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #1: ffff88803d7ae800 (&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.4/2250: #0: ffff888025d22410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2434/0x2790 kernel/signal.c:2878 #1: ffff888041f79800 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #1: ffff888041f79800 (&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.1/2251: #0: ffff888025d22410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2434/0x2790 kernel/signal.c:2878 #1: ffff888041f78e00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #1: ffff888041f78e00 (&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.3/2253: #0: ffff888025d22410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2434/0x2790 kernel/signal.c:2878 #1: ffff8880353ef200 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #1: ffff8880353ef200 (&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.5/2254: #0: ffff888025d22410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2434/0x2790 kernel/signal.c:2878 #1: ffff888041f7ac00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #1: ffff888041f7ac00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3c0 fs/ext4/file.c:294 1 lock held by cmp/2356: ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.6.0-rc4-syzkaller-00012-gce36c8b14987 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 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+0x299/0x300 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+0xf87/0x1210 kernel/hung_task.c:379 kthread+0x33c/0x440 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 2358 Comm: rm Not tainted 6.6.0-rc4-syzkaller-00012-gce36c8b14987 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x4/0x20 kernel/kcov.c:304 Code: 66 0f 1f 44 00 00 f3 0f 1e fa 48 8b 0c 24 0f b7 d6 0f b7 f7 bf 03 00 00 00 e9 b8 fe ff ff 0f 1f 84 00 00 00 00 00 f3 0f 1e fa <48> 8b 0c 24 89 f2 89 fe bf 05 00 00 00 e9 9a fe ff ff 66 2e 0f 1f RSP: 0018:ffffc90004acf608 EFLAGS: 00000206 RAX: 000000000000030b RBX: ffff88805e5f880c RCX: 0000000000000000 RDX: ffff888022760000 RSI: 0000000000000300 RDI: 0000000000000300 RBP: 0000000000000300 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 00007f9dd7ebffff R12: dffffc0000000000 R13: 0000000000000000 R14: 0000000000000000 R15: ffff88807c2e9340 FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9dd7f7e108 CR3: 000000001e766000 CR4: 0000000000350ef0 Call Trace: mt_locked lib/maple_tree.c:805 [inline] mt_slot lib/maple_tree.c:812 [inline] mas_slot lib/maple_tree.c:845 [inline] mas_descend lib/maple_tree.c:1047 [inline] mt_validate+0x3c5/0x3d00 lib/maple_tree.c:7203 validate_mm+0x9a/0x460 mm/mmap.c:288 __split_vma+0xc58/0x1070 mm/mmap.c:2388 do_vmi_align_munmap+0x2c3/0x15f0 mm/mmap.c:2464 do_vmi_munmap+0x20e/0x450 mm/mmap.c:2623 mmap_region+0x184/0x28b0 mm/mmap.c:2673 do_mmap+0x893/0xef0 mm/mmap.c:1354 vm_mmap_pgoff+0x1a8/0x3b0 mm/util.c:546 ksys_mmap_pgoff+0x422/0x5b0 mm/mmap.c:1400 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:93 [inline] __se_sys_mmap arch/x86/kernel/sys_x86_64.c:86 [inline] __x64_sys_mmap+0x125/0x190 arch/x86/kernel/sys_x86_64.c:86 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f9dd7fa0b74 Code: 63 08 44 89 e8 5b 41 5c 41 5d c3 41 89 ca 41 f7 c1 ff 0f 00 00 74 0c c7 05 f5 46 01 00 16 00 00 00 eb 17 b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 0c f7 d8 89 05 dc 46 01 00 48 83 c8 ff c3 0f RSP: 002b:00007ffe72138aa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 00007ffe72138ae8 RCX: 00007f9dd7fa0b74 RDX: 0000000000000005 RSI: 0000000000123000 RDI: 00007f9dd7d37000 RBP: 00007ffe72139240 R08: 0000000000000003 R09: 0000000000028000 R10: 0000000000000812 R11: 0000000000000246 R12: 00007f9dd7f835c0 R13: 00007ffe721392c8 R14: 0000000000027f38 R15: 0000000000000000