kauditd_printk_skb: 25 callbacks suppressed audit: type=1800 audit(1677007673.667:64): pid=13485 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.3" name="bus" dev="loop3" ino=263 res=0 INFO: task syz-executor.1:11958 blocked for more than 140 seconds. Not tainted 4.19.211-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D30000 11958 8135 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline] rwsem_down_read_failed+0x20a/0x390 kernel/locking/rwsem-xadd.c:309 call_rwsem_down_read_failed+0x14/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] down_read+0x44/0x80 kernel/locking/rwsem.c:26 __get_super.part.0+0x209/0x2e0 fs/super.c:698 __get_super include/linux/spinlock.h:329 [inline] get_super+0x2b/0x50 fs/super.c:727 fsync_bdev+0x14/0xc0 fs/block_dev.c:483 blkdev_flushbuf block/ioctl.c:436 [inline] blkdev_ioctl+0x912/0x1a80 block/ioctl.c:521 block_ioctl+0xe9/0x130 fs/block_dev.c:1906 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f6c547ea0f9 Code: Bad RIP value. RSP: 002b:00007f6c52d3b168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f6c5490a050 RCX: 00007f6c547ea0f9 RDX: 0000000000000000 RSI: 0000000000001261 RDI: 0000000000000003 RBP: 00007f6c54845ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffef22d9a6f R14: 00007f6c52d3b300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1570: #0: 00000000ccdcb84e (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 1 lock held by in:imklog/7852: #0: 00000000f58dbe10 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 2 locks held by syz-executor.1/11951: 1 lock held by syz-executor.1/11958: #0: 000000007909a93a (&type->s_umount_key#53){++++}, at: __get_super.part.0+0x209/0x2e0 fs/super.c:698 2 locks held by syz-executor.1/12433: #0: 00000000914ee0a3 (&bdev->bd_fsfreeze_mutex){+.+.}, at: mount_bdev+0x90/0x3b0 fs/super.c:1125 #1: 000000007909a93a (&type->s_umount_key#53){++++}, at: grab_super+0xa2/0x350 fs/super.c:383 1 lock held by syz-executor.1/12434: #0: 000000007909a93a (&type->s_umount_key#53){++++}, at: __get_super.part.0+0x209/0x2e0 fs/super.c:698 1 lock held by syz-executor.3/13467: #0: 000000007909a93a (&type->s_umount_key#53){++++}, at: iterate_supers+0xdb/0x290 fs/super.c:631 1 lock held by syz-executor.3/13476: #0: 000000007909a93a (&type->s_umount_key#53){++++}, at: iterate_supers+0xdb/0x290 fs/super.c:631 1 lock held by syz-executor.3/13481: #0: 000000007909a93a (&type->s_umount_key#53){++++}, at: iterate_supers+0xdb/0x290 fs/super.c:631 1 lock held by syz-executor.3/13485: #0: 000000007909a93a (&type->s_umount_key#53){++++}, at: iterate_supers+0xdb/0x290 fs/super.c:631 1 lock held by syz-executor.3/13580: #0: 000000007909a93a (&type->s_umount_key#53){++++}, at: iterate_supers+0xdb/0x290 fs/super.c:631 1 lock held by syz-executor.3/13583: #0: 000000007909a93a (&type->s_umount_key#53){++++}, at: iterate_supers+0xdb/0x290 fs/super.c:631 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1570 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 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 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 11951 Comm: syz-executor.1 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 RIP: 0010:memory_is_poisoned_n mm/kasan/kasan.c:211 [inline] RIP: 0010:memory_is_poisoned mm/kasan/kasan.c:241 [inline] RIP: 0010:check_memory_region_inline mm/kasan/kasan.c:257 [inline] RIP: 0010:check_memory_region+0x20/0x170 mm/kasan/kasan.c:267 Code: 0f 1f 84 00 00 00 00 00 66 90 48 85 f6 0f 84 3f 01 00 00 48 b8 ff ff ff ff ff 7f ff ff 44 0f b6 c2 48 39 c7 0f 86 20 01 00 00 <4c> 8d 54 37 ff 41 54 48 b8 00 00 00 00 00 fc ff df 4d 89 d1 55 48 RSP: 0018:ffff888096fc7390 EFLAGS: 00000016 RAX: ffff7fffffffffff RBX: 0000000000000000 RCX: ffffffff814afa31 RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff8cd631c8 RBP: 0000000000000002 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000000 R13: ffff88809f4a65c0 R14: ffffffff89f85fa0 R15: 0000000000000000 FS: 00007f6c52d5c700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f93d5fbf000 CR3: 0000000099176000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: atomic_inc include/asm-generic/atomic-instrumented.h:109 [inline] __lock_acquire+0x251/0x3ff0 kernel/locking/lockdep.c:3308 lock_acquire+0x170/0x3c0 kernel/locking/lockdep.c:3908 rcu_lock_acquire include/linux/rcupdate.h:242 [inline] rcu_read_lock include/linux/rcupdate.h:627 [inline] find_get_entry+0xa1/0x8a0 mm/filemap.c:1451 pagecache_get_page+0x56/0xd50 mm/filemap.c:1564 find_or_create_page include/linux/pagemap.h:322 [inline] grow_dev_page fs/buffer.c:948 [inline] grow_buffers fs/buffer.c:1017 [inline] __getblk_slow+0x216/0x9e0 fs/buffer.c:1044 __getblk_gfp fs/buffer.c:1321 [inline] __bread_gfp+0x218/0x300 fs/buffer.c:1366 sb_bread include/linux/buffer_head.h:309 [inline] udf_tread+0xe8/0x130 fs/udf/misc.c:44 udf_read_tagged+0x4e/0x530 fs/udf/misc.c:219 udf_check_anchor_block+0x1b4/0x610 fs/udf/super.c:1827 udf_scan_anchors+0x1b3/0x5f0 fs/udf/super.c:1867 udf_find_anchor fs/udf/super.c:1932 [inline] udf_load_vrs+0x872/0xbf0 fs/udf/super.c:1989 udf_fill_super+0x7d1/0x17a0 fs/udf/super.c:2184 mount_bdev+0x2fc/0x3b0 fs/super.c:1158 mount_fs+0xa3/0x310 fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2492 [inline] do_mount+0x115c/0x2f50 fs/namespace.c:2822 ksys_mount+0xcf/0x130 fs/namespace.c:3038 __do_sys_mount fs/namespace.c:3052 [inline] __se_sys_mount fs/namespace.c:3049 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3049 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f6c547ea0f9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f6c52d5c168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f6c54909f80 RCX: 00007f6c547ea0f9 RDX: 0000000020000040 RSI: 0000000020000140 RDI: 00000000200004c0 RBP: 00007f6c54845ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffef22d9a6f R14: 00007f6c52d5c300 R15: 0000000000022000