Hello, syzbot found the following issue on: HEAD commit: 512dee0c00ad Merge tag 'x86-urgent-2023-01-04' of git://gi.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=15646c8c480000 kernel config: https://syzkaller.appspot.com/x/.config?x=9babfdc3dd4772d0 dashboard link: https://syzkaller.appspot.com/bug?extid=77d6fcc37bbb92f26048 compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11aec6fa480000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17af7d38480000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/bfe07129fec8/disk-512dee0c.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/b694f4342135/vmlinux-512dee0c.xz kernel image: https://storage.googleapis.com/syzbot-assets/dcea4a460ec2/bzImage-512dee0c.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/6b86252caf20/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+77d6fcc37bbb92f26048@xxxxxxxxxxxxxxxxxxxxxxxxx INFO: task syz-executor232:5073 blocked for more than 143 seconds. Not tainted 6.2.0-rc2-syzkaller-00024-g512dee0c00ad #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor232 state:D stack:21024 pid:5073 ppid:5072 flags:0x00004004 Call Trace: <TASK> context_switch kernel/sched/core.c:5244 [inline] __schedule+0x995/0xe20 kernel/sched/core.c:6555 schedule+0xcb/0x190 kernel/sched/core.c:6631 __wait_on_freeing_inode fs/inode.c:2196 [inline] find_inode_fast+0x35a/0x4c0 fs/inode.c:950 iget_locked+0xb1/0x830 fs/inode.c:1273 __ext4_iget+0x22e/0x3ed0 fs/ext4/inode.c:4861 ext4_xattr_inode_iget+0x68/0x4e0 fs/ext4/xattr.c:389 ext4_xattr_inode_dec_ref_all+0x1a7/0xe50 fs/ext4/xattr.c:1148 ext4_xattr_delete_inode+0xb04/0xcd0 fs/ext4/xattr.c:2880 ext4_evict_inode+0xd7c/0x10b0 fs/ext4/inode.c:296 evict+0x2a4/0x620 fs/inode.c:664 ext4_orphan_cleanup+0xb60/0x1340 fs/ext4/orphan.c:474 __ext4_fill_super fs/ext4/super.c:5516 [inline] ext4_fill_super+0x81cd/0x8700 fs/ext4/super.c:5644 get_tree_bdev+0x400/0x620 fs/super.c:1282 vfs_get_tree+0x88/0x270 fs/super.c:1489 do_new_mount+0x289/0xad0 fs/namespace.c:3145 do_mount fs/namespace.c:3488 [inline] __do_sys_mount fs/namespace.c:3697 [inline] __se_sys_mount+0x2d3/0x3c0 fs/namespace.c:3674 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fa5406fd5ea RSP: 002b:00007ffc7232f968 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fa5406fd5ea RDX: 0000000020000440 RSI: 0000000020000000 RDI: 00007ffc7232f970 RBP: 00007ffc7232f970 R08: 00007ffc7232f9b0 R09: 0000000000000432 R10: 0000000000804a03 R11: 0000000000000202 R12: 0000000000000004 R13: 0000555556a7a2c0 R14: 00007ffc7232f9b0 R15: 0000000000000000 </TASK> Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/12: #0: ffffffff8d326f50 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507 1 lock held by rcu_tasks_trace/13: #0: ffffffff8d327750 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507 1 lock held by khungtaskd/28: #0: ffffffff8d326d80 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 2 locks held by getty/4743: #0: ffff88814bdd0098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244 #1: ffffc900015a02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x53b/0x1650 drivers/tty/n_tty.c:2177 2 locks held by syz-executor232/5073: #0: ffff88802a5380e0 (&type->s_umount_key#28/1){+.+.}-{3:3}, at: alloc_super+0x212/0x920 fs/super.c:228 #1: ffff88802a538650 (sb_internal){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1811 [inline] #1: ffff88802a538650 (sb_internal){.+.+}-{0:0}, at: sb_start_intwrite include/linux/fs.h:1933 [inline] #1: ffff88802a538650 (sb_internal){.+.+}-{0:0}, at: ext4_evict_inode+0x4cd/0x10b0 fs/ext4/inode.c:240 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.2.0-rc2-syzkaller-00024-g512dee0c00ad #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1b1/0x290 lib/dump_stack.c:106 nmi_cpu_backtrace+0x46f/0x4f0 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x1ba/0x420 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline] watchdog+0xcd5/0xd20 kernel/hung_task.c:377 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 </TASK> Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4421 Comm: klogd Not tainted 6.2.0-rc2-syzkaller-00024-g512dee0c00ad #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 RIP: 0010:vsnprintf+0x3cd/0x1cb0 lib/vsprintf.c:2829 Code: e8 08 92 e0 f6 48 83 fb 28 4c 8b 7c 24 08 0f 87 80 08 00 00 e8 d4 8d e0 f6 48 8b 7c 24 30 48 89 f8 48 c1 e8 03 42 80 3c 28 00 <74> 05 e8 ac 37 36 f7 89 d8 49 03 5e 10 44 8d 78 08 48 8b 44 24 10 RSP: 0018:ffffc90002f6f7a0 EFLAGS: 00000246 RAX: 1ffff920005edf22 RBX: 0000000000000010 RCX: ffff88807d8e1d40 RDX: 0000000000000000 RSI: 0000000000000010 RDI: ffffc90002f6f910 RBP: ffffc90002f6f890 R08: ffffffff8aab4d78 R09: ffffffff8aab4b6e R10: 0000000000000012 R11: ffff88807d8e1d40 R12: ffff0a0000000509 R13: dffffc0000000000 R14: ffffc90002f6f900 R15: ffffc90082f6fae2 FS: 00007f99d0120800(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005630c40b8a40 CR3: 000000002b714000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> sprintf+0xc7/0x110 lib/vsprintf.c:3000 print_time kernel/printk/printk.c:1357 [inline] info_print_prefix+0x153/0x2e0 kernel/printk/printk.c:1383 record_print_text+0x12e/0x430 kernel/printk/printk.c:1432 syslog_print+0x3a0/0x5e0 kernel/printk/printk.c:1643 do_syslog+0x815/0x8f0 kernel/printk/printk.c:1762 __do_sys_syslog kernel/printk/printk.c:1854 [inline] __se_sys_syslog kernel/printk/printk.c:1852 [inline] __x64_sys_syslog+0x78/0x90 kernel/printk/printk.c:1852 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f99d02bb8b7 Code: 73 01 c3 48 8b 0d c1 05 0c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 67 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 91 05 0c 00 f7 d8 64 89 01 48 RSP: 002b:00007ffec1edf228 EFLAGS: 00000206 ORIG_RAX: 0000000000000067 RAX: ffffffffffffffda RBX: 00007f99d0448490 RCX: 00007f99d02bb8b7 RDX: 00000000000003ff RSI: 00007f99d0448490 RDI: 0000000000000002 RBP: 0000000000000000 R08: 0000000000000007 R09: 000055d7b192cd50 R10: 0000000000004000 R11: 0000000000000206 R12: 00007f99d0448490 R13: 00007f99d044850e R14: 00007f99d044850e R15: 0000000000000000 </TASK> --- 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. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches
