INFO: task syz-executor.2:8325 blocked for more than 143 seconds. Not tainted 5.1.0+ #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D29408 8325 8052 0x00004004 Call Trace: context_switch kernel/sched/core.c:2817 [inline] __schedule+0x7d1/0x1580 kernel/sched/core.c:3444 schedule+0xa8/0x260 kernel/sched/core.c:3508 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:585 [inline] rwsem_down_write_failed+0x7a1/0xc60 kernel/locking/rwsem-xadd.c:617 __down_write kernel/locking/rwsem.h:227 [inline] down_write+0x93/0xa0 kernel/locking/rwsem.c:68 grab_super+0xb4/0x290 fs/super.c:385 sget_userns+0x1ab/0x560 fs/super.c:601 sget+0x10c/0x150 fs/super.c:660 mount_bdev+0xff/0x3c0 fs/super.c:1319 udf_mount+0x35/0x40 fs/udf/super.c:131 legacy_get_tree+0x10a/0x220 fs/fs_context.c:665 vfs_get_tree+0x93/0x3a0 fs/super.c:1476 do_new_mount fs/namespace.c:2790 [inline] do_mount+0x138c/0x1c00 fs/namespace.c:3110 ksys_mount+0xdb/0x150 fs/namespace.c:3319 __do_sys_mount fs/namespace.c:3333 [inline] __se_sys_mount fs/namespace.c:3330 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3330 do_syscall_64+0x103/0x670 arch/x86/entry/common.c:298 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458da9 Code: Bad RIP value. RSP: 002b:00007f561a76dc78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000458da9 RDX: 0000000020000140 RSI: 0000000020000080 RDI: 0000000020000000 RBP: 000000000073c0e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f561a76e6d4 R13: 00000000004c4da1 R14: 00000000004d8a08 R15: 00000000ffffffff Showing all locks held in the system: 1 lock held by khungtaskd/1040: #0: 00000000efacfa90 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:5142 1 lock held by ping_printk/3734: #0: 00000000efacfa90 (rcu_read_lock){....}, at: rcu_read_lock+0x0/0x70 arch/x86/include/asm/paravirt.h:767 1 lock held by rsyslogd/7854: #0: 000000002b5d9fd4 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 fs/file.c:801 2 locks held by getty/7943: #0: 000000008baa9b1a (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000188b9e62 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/7944: #0: 00000000ff30ecc9 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000f90058cc (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/7945: #0: 0000000014472213 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000d3649ce5 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/7946: #0: 000000000c495207 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 0000000027ec890e (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/7947: #0: 0000000048eb97c5 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 0000000061e486df (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/7948: #0: 00000000d6db8815 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 000000002a50408a (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/7949: #0: 00000000df4cc1fa (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 000000001e0ed4dc (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 1 lock held by syz-executor.2/8291: #0: 000000000f3c7140 (&type->s_umount_key#46/1){+.+.}, at: alloc_super+0x158/0x890 fs/super.c:228 2 locks held by syz-executor.2/8325: #0: 0000000098aea68f (&bdev->bd_fsfreeze_mutex){+.+.}, at: mount_bdev+0x93/0x3c0 fs/super.c:1313 #1: 000000000f3c7140 (&type->s_umount_key#47){+.+.}, at: grab_super+0xb4/0x290 fs/super.c:385 ============================================= INFO: Currently running syz-executor.2 R running task 27216 8291 8052 0x80004006 Call Trace: context_switch kernel/sched/core.c:2817 [inline] __schedule+0x7d1/0x1580 kernel/sched/core.c:3444