Hello, syzbot found the following issue on: HEAD commit: b5d2afe8745b Merge branches 'for-next/kbuild', 'for-next/m.. git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci console output: https://syzkaller.appspot.com/x/log.txt?x=139e600b180000 kernel config: https://syzkaller.appspot.com/x/.config?x=560f5db1d0b3f6d0 dashboard link: https://syzkaller.appspot.com/bug?extid=dbb72d38131e90dc1f66 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: arm64 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1745f177180000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17509b6d180000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/50bff35e1638/disk-b5d2afe8.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/4eeaa73e7ed1/vmlinux-b5d2afe8.xz kernel image: https://storage.googleapis.com/syzbot-assets/8e796b089aa9/Image-b5d2afe8.gz.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/3f56655953c4/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+dbb72d38131e90dc1f66@xxxxxxxxxxxxxxxxxxxxxxxxx INFO: task syz-executor105:6284 blocked for more than 143 seconds. Not tainted 6.9.0-rc3-syzkaller-gb5d2afe8745b #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor105 state:D stack:0 pid:6284 tgid:6284 ppid:6282 flags:0x00000004 Call trace: __switch_to+0x314/0x560 arch/arm64/kernel/process.c:553 context_switch kernel/sched/core.c:5409 [inline] __schedule+0x14bc/0x24ec kernel/sched/core.c:6746 __schedule_loop kernel/sched/core.c:6823 [inline] schedule+0xbc/0x238 kernel/sched/core.c:6838 bit_wait+0x1c/0xac kernel/sched/wait_bit.c:199 __wait_on_bit kernel/sched/wait_bit.c:49 [inline] out_of_line_wait_on_bit+0x208/0x334 kernel/sched/wait_bit.c:64 wait_on_bit include/linux/wait_bit.h:76 [inline] gfs2_glock_wait+0xb8/0x298 fs/gfs2/glock.c:1354 gfs2_glock_nq+0xcc8/0x169c fs/gfs2/glock.c:1616 gfs2_glock_nq_init fs/gfs2/glock.h:238 [inline] __gfs2_lookup+0x124/0x270 fs/gfs2/inode.c:905 gfs2_lookup+0x2c/0x3c fs/gfs2/inode.c:930 __lookup_slow+0x250/0x374 fs/namei.c:1692 lookup_slow+0x60/0x84 fs/namei.c:1709 walk_component+0x280/0x36c fs/namei.c:2004 lookup_last fs/namei.c:2461 [inline] path_lookupat+0x13c/0x3d0 fs/namei.c:2485 filename_lookup+0x1d4/0x4e0 fs/namei.c:2514 user_path_at_empty+0x5c/0x84 fs/namei.c:2921 user_path_at include/linux/namei.h:57 [inline] ksys_umount fs/namespace.c:1916 [inline] __do_sys_umount fs/namespace.c:1924 [inline] __se_sys_umount fs/namespace.c:1922 [inline] __arm64_sys_umount+0xf8/0x17c fs/namespace.c:1922 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 Showing all locks held in the system: 1 lock held by khungtaskd/30: #0: ffff80008f057880 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:328 2 locks held by getty/6006: #0: ffff0000ccbde0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff800097b9b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x41c/0x1228 drivers/tty/n_tty.c:2201 1 lock held by syz-executor105/6284: #0: ffff0000df4da9a0 (&type->i_mutex_dir_key#6){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:805 [inline] #0: ffff0000df4da9a0 (&type->i_mutex_dir_key#6){.+.+}-{3:3}, at: lookup_slow+0x50/0x84 fs/namei.c:1708 ============================================= --- 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 report is already addressed, 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 report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
