INFO: task syz-executor374:4195 blocked for more than 143 seconds.
      Not tainted 5.15.185-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor374 state:D stack:28752 pid: 4195 ppid:  4190 flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5030 [inline]
 __schedule+0x11b8/0x43b0 kernel/sched/core.c:6376
 schedule+0x11b/0x1e0 kernel/sched/core.c:6459
 rwsem_down_write_slowpath+0xc46/0x11f0 kernel/locking/rwsem.c:1165
 user_get_super+0xcd/0x240 fs/super.c:848
 quotactl_block fs/quota/quota.c:889 [inline]
 __do_sys_quotactl fs/quota/quota.c:953 [inline]
 __se_sys_quotactl+0x45e/0x6c0 fs/quota/quota.c:915
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f79f34c13c9
RSP: 002b:00007f79f345d218 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f79f35495f8 RCX: 00007f79f34c13c9
RDX: 0000000000000000 RSI: 00002000000000c0 RDI: ffffffff80000302
RBP: 00007f79f35495f0 R08: 00007ffd2ab099a7 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00002000000000c0
R13: 0030656c69662f2e R14: 0000200000000040 R15: 7366726573696572
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/27:
 #0: ffffffff8c11bfa0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3941:
 #0: ffff88814c52e098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
 #1: ffffc90002ce62e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x5ba/0x1a30 drivers/tty/n_tty.c:2158
3 locks held by syz-executor374/4192:
1 lock held by syz-executor374/4195:
 #0: ffff88801a5940e0 (&type->s_umount_key#42){+.+.}-{3:3}, at: user_get_super+0xcd/0x240 fs/super.c:848

=============================================

NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.15.185-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x397/0x3d0 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x163/0x280 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
 watchdog+0xe0f/0xe50 kernel/hung_task.c:369
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4192 Comm: syz-executor374 Not tainted 5.15.185-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:REISERFS_SB fs/reiserfs/reiserfs.h:1152 [inline]
RIP: 0010:search_by_key+0x861/0x4390 fs/reiserfs/stree.c:703
Code: 00 bf ff ff ff ff 8b 5c 24 5c 89 de e8 d8 11 7a ff 83 fb ff 74 0a e8 6e 0e 7a ff 41 89 df eb 72 e8 64 0e 7a ff 48 8b 44 24 68 <42> 80 3c 28 00 48 8b 5c 24 10 74 08 48 89 df e8 5b 86 bf ff 48 8b
RSP: 0018:ffffc90002daf260 EFLAGS: 00000293
RAX: 1ffff110034b28cf RBX: 00000000ffffffff RCX: ffff888075f30000
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 00000000ffffffff
RBP: ffffc90002daf520 R08: dffffc0000000000 R09: ffffed100dfb9075
R10: ffffed100dfb9075 R11: 1ffff1100dfb9074 R12: ffffc90002daf838
R13: dffffc0000000000 R14: ffff88806fdc83a0 R15: 00000000ffffffff
FS:  00007f79f347e6c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055b6a41d4168 CR3: 000000007e037000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 search_by_entry_key+0x32/0x1370 fs/reiserfs/namei.c:125
 reiserfs_find_entry+0xeec/0x18e0 fs/reiserfs/namei.c:322
 reiserfs_lookup+0x1a7/0x420 fs/reiserfs/namei.c:368
 __lookup_slow+0x27d/0x3d0 fs/namei.c:1663
 lookup_one_len+0x18e/0x2c0 fs/namei.c:2718
 reiserfs_lookup_privroot+0x85/0x1e0 fs/reiserfs/xattr.c:980
 reiserfs_fill_super+0x1f65/0x23e0 fs/reiserfs/super.c:2178
 mount_bdev+0x287/0x3c0 fs/super.c:1400
 legacy_get_tree+0xe6/0x180 fs/fs_context.c:611
 vfs_get_tree+0x88/0x270 fs/super.c:1530
 do_new_mount+0x24a/0xa40 fs/namespace.c:3010
 do_mount fs/namespace.c:3353 [inline]
 __do_sys_mount fs/namespace.c:3561 [inline]
 __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3538
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f79f34c27ea
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 5e 04 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f79f347e088 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f79f347e0a0 RCX: 00007f79f34c27ea
RDX: 00002000000000c0 RSI: 0000200000000040 RDI: 00007f79f347e0a0
RBP: 0000200000000040 R08: 00007f79f347e0e0 R09: 0000000000001116
R10: 000000000000800c R11: 0000000000000286 R12: 00002000000000c0
R13: 00007f79f347e0e0 R14: 0000000000000003 R15: 000000000000800c
 </TASK>