Hello, syzbot found the following issue on: HEAD commit: 0bb80ecc33a8 Linux 6.6-rc1 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=174f44e8680000 kernel config: https://syzkaller.appspot.com/x/.config?x=f7435f9f9f66fcd9 dashboard link: https://syzkaller.appspot.com/bug?extid=bae3c73c7bf2fe3a740b compiler: aarch64-linux-gnu-gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: arm64 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1381f8d8680000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1365c2a0680000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/384ffdcca292/non_bootable_disk-0bb80ecc.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/fa2698d36fcb/vmlinux-0bb80ecc.xz kernel image: https://storage.googleapis.com/syzbot-assets/077f03e6d621/Image-0bb80ecc.gz.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+bae3c73c7bf2fe3a740b@xxxxxxxxxxxxxxxxxxxxxxxxx INFO: task udevd:3125 blocked for more than 450 seconds. Not tainted 6.6.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:udevd state:D stack:0 pid:3125 ppid:2924 flags:0x0000000d Call trace: __switch_to+0x1d0/0x348 arch/arm64/kernel/process.c:556 context_switch kernel/sched/core.c:5382 [inline] __schedule+0xac4/0x2ae4 kernel/sched/core.c:6695 schedule+0xc8/0x19c kernel/sched/core.c:6771 io_schedule+0xac/0x114 kernel/sched/core.c:9026 folio_wait_bit_common+0x2a8/0x6d8 mm/filemap.c:1301 __folio_lock mm/filemap.c:1629 [inline] folio_lock include/linux/pagemap.h:1042 [inline] folio_lock include/linux/pagemap.h:1038 [inline] __filemap_get_folio+0x418/0x840 mm/filemap.c:1882 truncate_inode_pages_range+0x270/0xb4c mm/truncate.c:376 truncate_inode_pages+0x14/0x20 mm/truncate.c:448 kill_bdev block/bdev.c:76 [inline] blkdev_flush_mapping+0x100/0x250 block/bdev.c:630 blkdev_put_whole+0xd4/0xf0 block/bdev.c:661 blkdev_put+0x284/0x6a8 block/bdev.c:898 blkdev_release+0x74/0xa8 block/fops.c:604 __fput+0x2a8/0x830 fs/file_table.c:384 ____fput+0x10/0x1c fs/file_table.c:412 task_work_run+0x124/0x20c kernel/task_work.c:179 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0x75c/0x1ecc kernel/exit.c:874 do_group_exit+0xa4/0x208 kernel/exit.c:1024 get_signal+0x19a4/0x1ae8 kernel/signal.c:2892 do_signal arch/arm64/kernel/signal.c:1249 [inline] do_notify_resume+0x480/0x3028 arch/arm64/kernel/signal.c:1302 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:144 [inline] el0_svc+0x11c/0x140 arch/arm64/kernel/entry-common.c:679 el0t_64_sync_handler+0x100/0x12c arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 INFO: task syz-executor137:3128 blocked for more than 450 seconds. Not tainted 6.6.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor137 state:D stack:0 pid:3128 ppid:3121 flags:0x00000005 Call trace: __switch_to+0x1d0/0x348 arch/arm64/kernel/process.c:556 context_switch kernel/sched/core.c:5382 [inline] __schedule+0xac4/0x2ae4 kernel/sched/core.c:6695 schedule+0xc8/0x19c kernel/sched/core.c:6771 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6830 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0x4e8/0x840 kernel/locking/mutex.c:747 mutex_lock_nested+0x24/0x30 kernel/locking/mutex.c:799 blkdev_get_by_dev.part.0+0x3ec/0x810 block/bdev.c:786 blkdev_get_by_dev+0x68/0x7c block/bdev.c:829 blkdev_open+0xec/0x288 block/fops.c:589 do_dentry_open+0x4e8/0x1138 fs/open.c:929 vfs_open+0x90/0xc8 fs/open.c:1063 do_open fs/namei.c:3639 [inline] path_openat+0x1488/0x2058 fs/namei.c:3796 do_filp_open+0x16c/0x330 fs/namei.c:3823 do_sys_openat2+0x12c/0x160 fs/open.c:1422 do_sys_open fs/open.c:1437 [inline] __do_sys_openat fs/open.c:1453 [inline] __se_sys_openat fs/open.c:1448 [inline] __arm64_sys_openat+0x12c/0x1b8 fs/open.c:1448 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x6c/0x258 arch/arm64/kernel/syscall.c:51 el0_svc_common.constprop.0+0xac/0x230 arch/arm64/kernel/syscall.c:136 do_el0_svc+0x40/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x58/0x140 arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x100/0x12c arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 INFO: lockdep is turned off. --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the bug is already fixed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite bug's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the bug is a duplicate of another bug, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
