INFO: task syz-executor.2:5073 blocked for more than 143 seconds. Not tainted 5.4.0-rc7 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D24200 5073 8813 0x00104006 Call Trace: context_switch kernel/sched/core.c:3384 [inline] __schedule+0x909/0x1ee0 kernel/sched/core.c:4078 schedule+0xd9/0x260 kernel/sched/core.c:4145 schedule_timeout+0x717/0xc50 kernel/time/timer.c:1871 do_wait_for_common kernel/sched/completion.c:83 [inline] __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common kernel/sched/completion.c:115 [inline] wait_for_completion+0x29c/0x440 kernel/sched/completion.c:136 devtmpfs_create_node+0x1b8/0x250 drivers/base/devtmpfs.c:128 device_add+0x13a0/0x17a0 drivers/base/core.c:2191 add_partition+0x8d1/0xe00 block/partition-generic.c:378 rescan_partitions+0x662/0xa30 block/partition-generic.c:625 __blkdev_reread_part+0x1a2/0x230 block/ioctl.c:174 blkdev_reread_part+0x27/0x40 block/ioctl.c:194 loop_reread_partitions+0x1c/0x40 drivers/block/loop.c:633 loop_set_status+0xe54/0x1370 drivers/block/loop.c:1343 loop_set_status64+0xc2/0x120 drivers/block/loop.c:1463 lo_ioctl+0x37c/0x1460 drivers/block/loop.c:1606 __blkdev_driver_ioctl block/ioctl.c:304 [inline] blkdev_ioctl+0xedb/0x1c20 block/ioctl.c:606 block_ioctl+0xee/0x130 fs/block_dev.c:1954 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:509 [inline] do_vfs_ioctl+0xdb6/0x13e0 fs/ioctl.c:696 ksys_ioctl+0xab/0xd0 fs/ioctl.c:713 __do_sys_ioctl fs/ioctl.c:720 [inline] __se_sys_ioctl fs/ioctl.c:718 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:718 do_syscall_64+0xfa/0x760 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45a087 Code: Bad RIP value. RSP: 002b:00007f50cd35c9f8 EFLAGS: 00000202 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f50cd35d6d4 RCX: 000000000045a087 RDX: 00007f50cd35cab0 RSI: 0000000000004c04 RDI: 0000000000000006 RBP: 00000000000001bf R08: 0000000000000000 R09: 000000000000000a R10: 0000000000000075 R11: 0000000000000202 R12: 0000000000000005 R13: 0000000000000005 R14: 0000000000000006 R15: 00000000ffffffff Showing all locks held in the system: 2 locks held by init/1: #0: ffff8880a32655a8 (&ei->i_mmap_sem){++++}, at: ext4_filemap_fault+0x7e/0xb2 fs/ext4/inode.c:6291 #1: ffffffff89045820 (fs_reclaim){+.+.}, at: fs_reclaim_acquire.part.0+0x0/0x30 include/linux/uaccess.h:173 1 lock held by kdevtmpfs/19: #0: ffffffff89045820 (fs_reclaim){+.+.}, at: fs_reclaim_acquire.part.0+0x0/0x30 include/linux/uaccess.h:173 1 lock held by khungtaskd/1071: #0: ffffffff88fab340 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:5337 1 lock held by kswapd0/1776: 2 locks held by udevd/3903: #0: ffff8880a32655a8 (&ei->i_mmap_sem){++++}, at: ext4_filemap_fault+0x7e/0xb2 fs/ext4/inode.c:6291 #1: ffffffff89045820 (fs_reclaim){+.+.}, at: fs_reclaim_acquire.part.0+0x0/0x30 include/linux/uaccess.h:173 2 locks held by rs:main Q:Reg/8675: #0: ffff8880a32b5868 (&ei->i_mmap_sem){++++}, at: ext4_filemap_fault+0x7e/0xb2 fs/ext4/inode.c:6291 #1: ffffffff89045820 (fs_reclaim){+.+.}, at: fs_reclaim_acquire.part.0+0x0/0x30 include/linux/uaccess.h:173 2 locks held by rsyslogd/8676: #0: ffff888090bb3668 (&ei->i_mmap_sem){++++}, at: ext4_filemap_fault+0x7e/0xb2 fs/ext4/inode.c:6291 #1: ffffffff89045820 (fs_reclaim){+.+.}, at: fs_reclaim_acquire.part.0+0x0/0x30 include/linux/uaccess.h:173 2 locks held by rsyslogd/8677: #0: ffff8880a32655a8 (&ei->i_mmap_sem){++++}, at: ext4_filemap_fault+0x7e/0xb2 fs/ext4/inode.c:6291 #1: ffffffff89045820 (fs_reclaim){+.+.}, at: fs_reclaim_acquire.part.0+0x0/0x30 include/linux/uaccess.h:173 2 locks held by cron/8717: #0: ffff8880a32655a8 (&ei->i_mmap_sem){++++}, at: ext4_filemap_fault+0x7e/0xb2 fs/ext4/inode.c:6291 #1: ffffffff89045820 (fs_reclaim){+.+.}, at: fs_reclaim_acquire.part.0+0x0/0x30 include/linux/uaccess.h:173 2 locks held by getty/8767: #0: ffff8880a1486090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc90005f412e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/8768: #0: ffff888096e13090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc90005f352e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/8769: #0: ffff8880a4024090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc90005f392e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/8770: #0: ffff8880a4dcd090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc90005f3d2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/8771: #0: ffff88809c686090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc90005f292e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/8772: #0: ffff8880993d2090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc90005f2d2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/8773: #0: ffff8880a52b5090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc90005f112e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by syz-fuzzer/8791: #0: ffff8880a67093e8 (&ei->i_mmap_sem){++++}, at: ext4_filemap_fault+0x7e/0xb2 fs/ext4/inode.c:6291 #1: ffffffff89045820 (fs_reclaim){+.+.}, at: fs_reclaim_acquire.part.0+0x0/0x30 include/linux/uaccess.h:173 2 locks held by syz-fuzzer/8792: #0: ffff8880a67093e8 (&ei->i_mmap_sem){++++}, at: ext4_filemap_fault+0x7e/0xb2 fs/ext4/inode.c:6291 #1: ffffffff89045820 (fs_reclaim){+.+.}, at: fs_reclaim_acquire.part.0+0x0/0x30 include/linux/uaccess.h:173 2 locks held by syz-fuzzer/8805: #0: ffff8880a67093e8 (&ei->i_mmap_sem){++++}, at: ext4_filemap_fault+0x7e/0xb2 fs/ext4/inode.c:6291 #1: ffffffff89045820 (fs_reclaim){+.+.}, at: fs_reclaim_acquire.part.0+0x0/0x30 include/linux/uaccess.h:173 2 locks held by udevd/27208: #0: ffff8880a32655a8 (&ei->i_mmap_sem){++++}, at: ext4_filemap_fault+0x7e/0xb2 fs/ext4/inode.c:6291 #1: ffffffff89045820 (fs_reclaim){+.+.}, at: fs_reclaim_acquire.part.0+0x0/0x30 include/linux/uaccess.h:173 2 locks held by udevd/29349: #0: ffff8880a32655a8 (&ei->i_mmap_sem){++++}, at: ext4_filemap_fault+0x7e/0xb2 fs/ext4/inode.c:6291 #1: ffffffff89045820 (fs_reclaim){+.+.}, at: fs_reclaim_acquire.part.0+0x0/0x30 include/linux/uaccess.h:173 2 locks held by udevd/332: #0: ffff8880a32655a8 (&ei->i_mmap_sem){++++}, at: ext4_filemap_fault+0x7e/0xb2 fs/ext4/inode.c:6291 #1: ffffffff89045820 (fs_reclaim){+.+.}, at: fs_reclaim_acquire.part.0+0x0/0x30 include/linux/uaccess.h:173 2 locks held by udevd/333: #0: ffff8880a330a568 (&ei->i_mmap_sem){++++}, at: ext4_filemap_fault+0x7e/0xb2 fs/ext4/inode.c:6291 #1: ffffffff89045820 (fs_reclaim){+.+.}, at: fs_reclaim_acquire.part.0+0x0/0x30 include/linux/uaccess.h:173 2 locks held by udevd/338: #0: ffff8880a32655a8 (&ei->i_mmap_sem){++++}, at: ext4_filemap_fault+0x7e/0xb2 fs/ext4/inode.c:6291 #1: ffffffff89045820 (fs_reclaim){+.+.}, at: fs_reclaim_acquire.part.0+0x0/0x30 include/linux/uaccess.h:173 2 locks held by udevd/420: #0: ffff8880a32655a8 (&ei->i_mmap_sem){++++}, at: ext4_filemap_fault+0x7e/0xb2 fs/ext4/inode.c:6291 #1: ffffffff89045820 (fs_reclaim){+.+.}, at: fs_reclaim_acquire.part.0+0x0/0x30 include/linux/uaccess.h:173 2 locks held by udevd/2548: #0: ffff8880a32655a8 (&ei->i_mmap_sem){++++}, at: ext4_filemap_fault+0x7e/0xb2 fs/ext4/inode.c:6291 #1: ffffffff89045820 (fs_reclaim){+.+.}, at: fs_reclaim_acquire.part.0+0x0/0x30 include/linux/uaccess.h:173 2 locks held by blkid/4944: #0: ffff8880a32655a8 (&ei->i_mmap_sem){++++}, at: ext4_filemap_fault+0x7e/0xb2 fs/ext4/inode.c:6291 #1: ffffffff89045820 (fs_reclaim){+.+.}, at: fs_reclaim_acquire.part.0+0x0/0x30 include/linux/uaccess.h:173 2 locks held by blkid/4955: #0: ffff88805f311658 (&mm->mmap_sem#2){++++}, at: do_user_addr_fault arch/x86/mm/fault.c:1382 [inline] #0: ffff88805f311658 (&mm->mmap_sem#2){++++}, at: __do_page_fault+0x33c/0xdd0 arch/x86/mm/fault.c:1506 #1: ffffffff89045820 (fs_reclaim){+.+.}, at: fs_reclaim_acquire.part.0+0x0/0x30 include/linux/uaccess.h:173 3 locks held by udevd/4983: #0: ffff888098dce6d8 (&mm->mmap_sem#2){++++}, at: do_user_addr_fault arch/x86/mm/fault.c:1382 [inline] #0: ffff888098dce6d8 (&mm->mmap_sem#2){++++}, at: __do_page_fault+0x33c/0xdd0 arch/x86/mm/fault.c:1506 #1: ffff8880a32655a8 (&ei->i_mmap_sem){++++}, at: ext4_filemap_fault+0x7e/0xb2 fs/ext4/inode.c:6291 #2: ffffffff89045820 (fs_reclaim){+.+.}, at: fs_reclaim_acquire.part.0+0x0/0x30 include/linux/uaccess.h:173 2 locks held by udevd/4984: #0: ffff8880a3262528 (&ei->i_mmap_sem){++++}, at: ext4_filemap_fault+0x7e/0xb2 fs/ext4/inode.c:6291 #1: ffffffff89045820 (fs_reclaim){+.+.}, at: fs_reclaim_acquire.part.0+0x0/0x30 include/linux/uaccess.h:173 2 locks held by blkid/4985: #0: ffff8880a32655a8 (&ei->i_mmap_sem){++++}, at: ext4_filemap_fault+0x7e/0xb2 fs/ext4/inode.c:6291 #1: ffffffff89045820 (fs_reclaim){+.+.}, at: fs_reclaim_acquire.part.0+0x0/0x30 include/linux/uaccess.h:173 2 locks held by blkid/4986: #0: ffff88808e710858 (&mm->mmap_sem#2){++++}, at: do_user_addr_fault arch/x86/mm/fault.c:1382 [inline] #0: ffff88808e710858 (&mm->mmap_sem#2){++++}, at: __do_page_fault+0x33c/0xdd0 arch/x86/mm/fault.c:1506 #1: ffffffff89045820 (fs_reclaim){+.+.}, at: fs_reclaim_acquire.part.0+0x0/0x30 include/linux/uaccess.h:173 2 locks held by blkid/4988: #0: ffff88808e50ba58 (&mm->mmap_sem#2){++++}, at: do_user_addr_fault arch/x86/mm/fault.c:1382 [inline] #0: ffff88808e50ba58 (&mm->mmap_sem#2){++++}, at: __do_page_fault+0x33c/0xdd0 arch/x86/mm/fault.c:1506 #1: ffffffff89045820 (fs_reclaim){+.+.}, at: fs_reclaim_acquire.part.0+0x0/0x30 include/linux/uaccess.h:173 2 locks held by blkid/4989: #0: ffff8880a32655a8 (&ei->i_mmap_sem){++++}, at: ext4_filemap_fault+0x7e/0xb2 fs/ext4/inode.c:6291 #1: ffffffff89045820 (fs_reclaim){+.+.}, at: fs_reclaim_acquire.part.0+0x0/0x30 include/linux/uaccess.h:173 2 locks held by udevd/4994: #0: ffff88809a0fd5c8 (&iint->mutex){+.+.}, at: process_measurement+0x394/0x1810 security/integrity/ima/ima_main.c:249 #1: ffffffff89045820 (fs_reclaim){+.+.}, at: fs_reclaim_acquire.part.0+0x0/0x30 include/linux/uaccess.h:173 2 locks held by udevd/4996: #0: ffff8880a32655a8 (&ei->i_mmap_sem){++++}, at: ext4_filemap_fault+0x7e/0xb2 fs/ext4/inode.c:6291 #1: ffffffff89045820 (fs_reclaim){+.+.}, at: fs_reclaim_acquire.part.0+0x0/0x30 include/linux/uaccess.h:173 2 locks held by udevd/4997: 2 locks held by udevd/5001: #0: ffff8880a32655a8 (&ei->i_mmap_sem){++++}, at: ext4_filemap_fault+0x7e/0xb2 fs/ext4/inode.c:6291 #1: ffffffff89045820 (fs_reclaim){+.+.}, at: fs_reclaim_acquire.part.0+0x0/0x30 include/linux/uaccess.h:173 2 locks held by blkid/5002: #0: ffff88805cab5218 (&mm->mmap_sem#2){++++}, at: do_user_addr_fault arch/x86/mm/fault.c:1382 [inline] #0: ffff88805cab5218 (&mm->mmap_sem#2){++++}, at: __do_page_fault+0x33c/0xdd0 arch/x86/mm/fault.c:1506 #1: ffffffff89045820 (fs_reclaim){+.+.}, at: fs_reclaim_acquire.part.0+0x0/0x30 include/linux/uaccess.h:173 2 locks held by blkid/5004: #0: ffff88808be78fd8 (&mm->mmap_sem#2){++++}, at: do_user_addr_fault arch/x86/mm/fault.c:1382 [inline] #0: ffff88808be78fd8 (&mm->mmap_sem#2){++++}, at: __do_page_fault+0x33c/0xdd0 arch/x86/mm/fault.c:1506 #1: ffffffff89045820 (fs_reclaim){+.+.}, at: fs_reclaim_acquire.part.0+0x0/0x30 include/linux/uaccess.h:173 2 locks held by udevd/5007: #0: ffff8880a32655a8 (&ei->i_mmap_sem){++++}, at: ext4_filemap_fault+0x7e/0xb2 fs/ext4/inode.c:6291 #1: ffffffff89045820 (fs_reclaim){+.+.}, at: fs_reclaim_acquire.part.0+0x0/0x30 include/linux/uaccess.h:173 2 locks held by blkid/5008: #0: ffff88805956e658 (&mm->mmap_sem#2){++++}, at: do_user_addr_fault arch/x86/mm/fault.c:1382 [inline] #0: ffff88805956e658 (&mm->mmap_sem#2){++++}, at: __do_page_fault+0x33c/0xdd0 arch/x86/mm/fault.c:1506