INFO: task syz-executor.1:20160 blocked for more than 140 seconds. Not tainted 4.19.160-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D29296 20160 8099 0x00000004 EXT4-fs (loop4): ext4_check_descriptors: Block bitmap for group 0 not in group (block 0)! Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 EXT4-fs (loop5): bad geometry: first data block 11520 is beyond end of filesystem (512) EXT4-fs (loop4): group descriptors corrupted! schedule+0x8d/0x1b0 kernel/sched/core.c:3561 request_wait_answer+0x3dc/0x750 fs/fuse/dev.c:485 __fuse_request_send+0x123/0x1c0 fs/fuse/dev.c:505 fuse_simple_request+0x2e6/0x820 fs/fuse/dev.c:576 EXT4-fs (loop5): bad geometry: first data block 11520 is beyond end of filesystem (512) EXT4-fs (loop4): ext4_check_descriptors: Block bitmap for group 0 not in group (block 0)! fuse_do_getattr+0x230/0xc50 fs/fuse/dir.c:927 EXT4-fs (loop4): group descriptors corrupted! fuse_update_get_attr fs/fuse/dir.c:960 [inline] fuse_getattr+0x261/0x2e0 fs/fuse/dir.c:1838 vfs_getattr_nosec+0xff/0x160 fs/stat.c:79 EXT4-fs (loop5): bad geometry: first data block 16128 is beyond end of filesystem (512) vfs_getattr fs/stat.c:116 [inline] vfs_statx+0x15a/0x210 fs/stat.c:189 vfs_stat include/linux/fs.h:3133 [inline] __do_sys_newstat fs/stat.c:337 [inline] __se_sys_newstat+0x96/0x120 fs/stat.c:333 EXT4-fs (loop5): bad geometry: first data block 16128 is beyond end of filesystem (512) do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45deb9 Code: 0d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ff018faec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000035180 RCX: 000000000045deb9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000bc0 RBP: 000000000118bf58 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c R13: 00007ffc569074af R14: 00007ff018faf9c0 R15: 000000000118bf2c Showing all locks held in the system: 1 lock held by khungtaskd/1565: #0: 00000000db73be24 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4440 3 locks held by systemd-udevd/4699: 1 lock held by in:imklog/7832: #0: 0000000088490d7c (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1565 Comm: khungtaskd Not tainted 4.19.160-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2fe lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1eb lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x991/0xe60 kernel/hung_task.c:287 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 12813 Comm: kworker/u4:7 Not tainted 4.19.160-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker RIP: 0010:separate_irq_context kernel/locking/lockdep.c:3058 [inline] RIP: 0010:__lock_acquire+0x7e6/0x3ff0 kernel/locking/lockdep.c:3406 Code: d2 74 75 48 8b 74 24 10 48 8d 14 92 48 8d 6c d6 d8 48 ba 00 00 00 00 00 fc ff df 48 8d 7d 21 48 89 f9 48 c1 e9 03 0f b6 14 11 <48> 89 f9 83 e1 07 38 ca 7f 08 84 d2 0f 85 c9 26 00 00 49 8d 7a 21 RSP: 0018:ffff88804a4279f8 EFLAGS: 00000802 RAX: 000000000000002e RBX: 617f85aa06cfdb32 RCX: 1ffff1100ad7d192 RDX: 0000000000000000 RSI: ffff888056be8c48 RDI: ffff888056be8c91 RBP: ffff888056be8c70 R08: 000000000000002e R09: 0000000000000002 R10: ffff888056be8c98 R11: 0000000000000000 R12: 000000000002002e R13: ffff888056be83c0 R14: ffff888056be8cb0 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000208ea98 CR3: 0000000091093000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x170/0x3c0 kernel/locking/lockdep.c:3907 rcu_lock_acquire include/linux/rcupdate.h:242 [inline] rcu_read_lock include/linux/rcupdate.h:627 [inline] batadv_nc_process_nc_paths.part.0+0xec/0x3d0 net/batman-adv/network-coding.c:698 batadv_nc_process_nc_paths net/batman-adv/network-coding.c:690 [inline] batadv_nc_worker+0xa59/0xd50 net/batman-adv/network-coding.c:746 process_one_work+0x864/0x1570 kernel/workqueue.c:2155 worker_thread+0x64c/0x1130 kernel/workqueue.c:2298 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415