ISOFS: Invalid session number or type of track ISOFS: Invalid session number INFO: task syz-executor1:25449 blocked for more than 120 seconds. Not tainted 4.17.0-rc7+ #76 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor1 D22744 25449 4585 0x00000004 Call Trace: context_switch kernel/sched/core.c:2859 [inline] __schedule+0x801/0x1e30 kernel/sched/core.c:3501 schedule+0xef/0x430 kernel/sched/core.c:3545 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline] rwsem_down_read_failed+0x350/0x5e0 kernel/locking/rwsem-xadd.c:286 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] down_read+0xbd/0x1b0 kernel/locking/rwsem.c:26 __get_super.part.12+0x20f/0x2e0 fs/super.c:695 __get_super include/linux/spinlock.h:310 [inline] get_super+0x2d/0x50 fs/super.c:724 fsync_bdev+0x17/0xc0 fs/block_dev.c:468 invalidate_partition+0x35/0x60 block/genhd.c:1581 drop_partitions.isra.12+0xdf/0x1e0 block/partition-generic.c:442 rescan_partitions+0x75/0x910 block/partition-generic.c:515 __blkdev_reread_part+0x1ad/0x230 block/ioctl.c:173 blkdev_reread_part+0x26/0x40 block/ioctl.c:193 loop_reread_partitions+0x159/0x180 drivers/block/loop.c:641 loop_set_status+0xb95/0x1010 drivers/block/loop.c:1188 loop_set_status64+0xaa/0x100 drivers/block/loop.c:1306 lo_ioctl+0x6f5/0x2130 drivers/block/loop.c:1422 __blkdev_driver_ioctl block/ioctl.c:303 [inline] blkdev_ioctl+0x9b6/0x2020 block/ioctl.c:601 block_ioctl+0xee/0x130 fs/block_dev.c:1877 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x1cf/0x16a0 fs/ioctl.c:684 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:701 __do_sys_ioctl fs/ioctl.c:708 [inline] __se_sys_ioctl fs/ioctl.c:706 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:706 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455a09 RSP: 002b:00007fe024951c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fe0249526d4 RCX: 0000000000455a09 RDX: 0000000020000480 RSI: 0000000000004c04 RDI: 0000000000000015 RBP: 000000000072bf50 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000002e0 R14: 00000000006f95a0 R15: 0000000000000001 Showing all locks held in the system: 2 locks held by khungtaskd/893: #0: 000000004b6df094 (rcu_read_lock){....}, at: check_hung_uninterruptible_tasks kernel/hung_task.c:175 [inline] #0: 000000004b6df094 (rcu_read_lock){....}, at: watchdog+0x1ff/0xf60 kernel/hung_task.c:249 #1: 00000000e9cfafda (tasklist_lock){.+.?}, at: debug_show_all_locks+0xde/0x34a kernel/locking/lockdep.c:4470 2 locks held by getty/4509: #0: 000000008b7ef12b (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 00000000cf099fbc (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131 2 locks held by getty/4510: #0: 000000000e8378f0 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 000000008cab12af (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131 2 locks held by getty/4511: #0: 000000009b00343c (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 00000000e2c35506 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131 2 locks held by getty/4512: #0: 000000009056e98e (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 000000001371e090 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131 2 locks held by getty/4513: #0: 000000003ede3e70 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 0000000048a1a1ec (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131 2 locks held by getty/4514: #0: 00000000306692c4 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 00000000db15743f (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131 2 locks held by getty/4515: #0: 000000001cfc4b8e (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 0000000089476ef7 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131 3 locks held by syz-executor1/25449: #0: 0000000061858aa1 (&lo->lo_ctl_mutex/1){+.+.}, at: lo_ioctl+0x8d/0x2130 drivers/block/loop.c:1392 #1: 000000000944d637 (&bdev->bd_mutex){+.+.}, at: blkdev_reread_part+0x1e/0x40 block/ioctl.c:192 #2: 00000000f782b2a9 (&type->s_umount_key#82){.+.+}, at: __get_super.part.12+0x20f/0x2e0 fs/super.c:695 1 lock held by blkid/25451: #0: 000000000944d637 (&bdev->bd_mutex){+.+.}, at: __blkdev_get+0x193/0x13a0 fs/block_dev.c:1460 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 893 Comm: khungtaskd Not tainted 4.17.0-rc7+ #76 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+0x1b9/0x294 lib/dump_stack.c:113 nmi_cpu_backtrace.cold.4+0x19/0xce lib/nmi_backtrace.c:103 nmi_trigger_cpumask_backtrace+0x151/0x192 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:138 [inline] check_hung_task kernel/hung_task.c:132 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:190 [inline] watchdog+0xc10/0xf60 kernel/hung_task.c:249 kthread+0x345/0x410 kernel/kthread.c:240 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 25445 Comm: syz-executor0 Not tainted 4.17.0-rc7+ #76 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:pagecache_get_page+0x103/0xe20 mm/filemap.c:1541 RSP: 0018:ffff8801cff7f2b8 EFLAGS: 00000246 RAX: 0000000000040000 RBX: 0000000000000002 RCX: ffffc900138f3000 RDX: 0000000000040000 RSI: ffffffff81957593 RDI: ffff8801ce44b6a0 RBP: ffff8801cff7f578 R08: ffff8801c9c20280 R09: ffffed003b5e46d2 R10: 0000000000000003 R11: 0000000000000001 R12: dffffc0000000000 R13: 0000000000000007 R14: 0000000001420848 R15: dffffc0000000000 FS: 00007fa5119bf700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 00000001b49d6000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: find_or_create_page include/linux/pagemap.h:322 [inline] grow_dev_page fs/buffer.c:940 [inline] grow_buffers fs/buffer.c:1009 [inline] __getblk_slow fs/buffer.c:1036 [inline] __getblk_gfp+0x39e/0xaf0 fs/buffer.c:1313 __bread_gfp+0x2d/0x310 fs/buffer.c:1347 sb_bread include/linux/buffer_head.h:309 [inline] isofs_fill_super+0x8b3/0x36ff fs/isofs/inode.c:671 mount_bdev+0x30c/0x3e0 fs/super.c:1174 isofs_mount+0x34/0x40 fs/isofs/inode.c:1563 mount_fs+0xae/0x328 fs/super.c:1277 vfs_kern_mount.part.34+0xd4/0x4d0 fs/namespace.c:1037 vfs_kern_mount fs/namespace.c:1027 [inline] do_new_mount fs/namespace.c:2518 [inline] do_mount+0x564/0x3070 fs/namespace.c:2848 ksys_mount+0x12d/0x140 fs/namespace.c:3064 __do_sys_mount fs/namespace.c:3078 [inline] __se_sys_mount fs/namespace.c:3075 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3075 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45843a RSP: 002b:00007fa5119beba8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000000 RCX: 000000000045843a RDX: 0000000020000000 RSI: 0000000020000040 RDI: 00007fa5119bebf0 RBP: 0000000000000000 R08: 0000000020000700 R09: 0000000020000000 R10: 0000000000000001 R11: 0000000000000202 R12: 0000000000000015 R13: 0000000000000000 R14: 00000000007000c8 R15: 0000000000000001 Code: 40 40 f2 f2 f2 f2 c7 40 44 00 f2 f2 f2 c7 40 48 f3 f3 f3 f3 48 8d 45 98 48 c1 e8 03 4c 01 e0 48 89 85 58 fd ff ff e8 cd cc e3 ff <48> 8b b5 68 fd ff ff 48 8b bd 70 fd ff ff e8 4a c2 ff ff 31 ff