syzbot

INFO: task syz-executor199:5735 blocked for more than 143 seconds.
      Not tainted 5.15.117-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor199 state:D stack:23584 pid: 5735 ppid:  3559 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5026 [inline]
 __schedule+0x12c4/0x4590 kernel/sched/core.c:6372
 schedule+0x11b/0x1f0 kernel/sched/core.c:6455
 schedule_timeout+0xac/0x300 kernel/time/timer.c:1860
 do_wait_for_common+0x2d9/0x480 kernel/sched/completion.c:85
 __wait_for_common kernel/sched/completion.c:106 [inline]
 wait_for_common kernel/sched/completion.c:117 [inline]
 wait_for_completion+0x48/0x60 kernel/sched/completion.c:138
 xfs_buf_iowait+0xb4/0x400 fs/xfs/xfs_buf.c:1573
 xfs_buf_delwri_pushbuf+0x2cf/0x4b0 fs/xfs/xfs_buf.c:2251
 xfs_qm_flush_one+0x266/0x350 fs/xfs/xfs_qm.c:1249
 xfs_qm_dquot_walk+0x22a/0x4a0 fs/xfs/xfs_qm.c:86
 xfs_qm_quotacheck+0x2f7/0x640 fs/xfs/xfs_qm.c:1335
 xfs_qm_mount_quotas+0x328/0x610 fs/xfs/xfs_qm.c:1441
 xfs_mountfs+0x162b/0x1ca0 fs/xfs/xfs_mount.c:904
 xfs_fs_fill_super+0x100c/0x1240 fs/xfs/xfs_super.c:1658
 get_tree_bdev+0x3fe/0x620 fs/super.c:1303
 vfs_get_tree+0x88/0x270 fs/super.c:1508
 do_new_mount+0x28b/0xae0 fs/namespace.c:2994
 do_mount fs/namespace.c:3337 [inline]
 __do_sys_mount fs/namespace.c:3545 [inline]
 __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3522
 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+0x61/0xcb
RIP: 0033:0x7f8d14b9fc4a
RSP: 002b:00007ffe28cf6138 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00646975756f6e2c RCX: 00007f8d14b9fc4a
RDX: 0000000020009700 RSI: 0000000020009740 RDI: 00007ffe28cf6150
RBP: 00007ffe28cf6150 R08: 00007ffe28cf6190 R09: 00000000000096c5
R10: 0000000002000000 R11: 0000000000000202 R12: 0000000000000004
R13: 000055555657a2c0 R14: 0000000002000000 R15: 00007ffe28cf6190
 </TASK>
INFO: task syz-executor199:6256 blocked for more than 143 seconds.
      Not tainted 5.15.117-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor199 state:D stack:23584 pid: 6256 ppid:  3562 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5026 [inline]
 __schedule+0x12c4/0x4590 kernel/sched/core.c:6372
 schedule+0x11b/0x1f0 kernel/sched/core.c:6455
 schedule_timeout+0xac/0x300 kernel/time/timer.c:1860
 do_wait_for_common+0x2d9/0x480 kernel/sched/completion.c:85
 __wait_for_common kernel/sched/completion.c:106 [inline]
 wait_for_common kernel/sched/completion.c:117 [inline]
 wait_for_completion+0x48/0x60 kernel/sched/completion.c:138
 xfs_buf_iowait+0xb4/0x400 fs/xfs/xfs_buf.c:1573
 xfs_buf_delwri_pushbuf+0x2cf/0x4b0 fs/xfs/xfs_buf.c:2251
 xfs_qm_flush_one+0x266/0x350 fs/xfs/xfs_qm.c:1249
 xfs_qm_dquot_walk+0x22a/0x4a0 fs/xfs/xfs_qm.c:86
 xfs_qm_quotacheck+0x2f7/0x640 fs/xfs/xfs_qm.c:1335
 xfs_qm_mount_quotas+0x328/0x610 fs/xfs/xfs_qm.c:1441
 xfs_mountfs+0x162b/0x1ca0 fs/xfs/xfs_mount.c:904
 xfs_fs_fill_super+0x100c/0x1240 fs/xfs/xfs_super.c:1658
 get_tree_bdev+0x3fe/0x620 fs/super.c:1303
 vfs_get_tree+0x88/0x270 fs/super.c:1508
 do_new_mount+0x28b/0xae0 fs/namespace.c:2994
 do_mount fs/namespace.c:3337 [inline]
 __do_sys_mount fs/namespace.c:3545 [inline]
 __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3522
 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+0x61/0xcb
RIP: 0033:0x7f8d14b9fc4a
RSP: 002b:00007ffe28cf6138 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00646975756f6e2c RCX: 00007f8d14b9fc4a
RDX: 0000000020009700 RSI: 0000000020009740 RDI: 00007ffe28cf6150
RBP: 00007ffe28cf6150 R08: 00007ffe28cf6190 R09: 00000000000096c5
R10: 0000000002000000 R11: 0000000000000202 R12: 0000000000000004
R13: 000055555657a2c0 R14: 0000000002000000 R15: 00007ffe28cf6190
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/27:
 #0: ffffffff8c91c5e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3255:
 #0: ffff888024dba098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
 #1: ffffc90002bb52e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6af/0x1da0 drivers/tty/n_tty.c:2147
2 locks held by syz-executor199/3557:
 #0: ffff8880786780e0 (&type->s_umount_key#43){++++}-{3:3}, at: deactivate_super+0xa9/0xe0 fs/super.c:365
 #1: ffffffff8c920b28 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:322 [inline]
 #1: ffffffff8c920b28 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x350/0x740 kernel/rcu/tree_exp.h:842
2 locks held by syz-executor199/3560:
 #0: ffff8880775760e0 (&type->s_umount_key#43){++++}-{3:3}, at: deactivate_super+0xa9/0xe0 fs/super.c:365
 #1: ffffffff8c920b28 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:322 [inline]
 #1: ffffffff8c920b28 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x350/0x740 kernel/rcu/tree_exp.h:842
1 lock held by syz-executor199/3561:
 #0: ffff8880775060e0 (&type->s_umount_key#43){++++}-{3:3}, at: deactivate_super+0xa9/0xe0 fs/super.c:365
3 locks held by kworker/1:1/3624:
2 locks held by kworker/0:3/3628:
 #0: ffff888011c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
 #1: ffffc90002d4fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
3 locks held by syz-executor199/5735:
 #0: ffff8880249700e0 (&type->s_umount_key#42/1){+.+.}-{3:3}, at: alloc_super+0x210/0x940 fs/super.c:229
 #1: ffff888074848158 (&qinf->qi_tree_lock){+.+.}-{3:3}, at: xfs_qm_dquot_walk+0x132/0x4a0 fs/xfs/xfs_qm.c:73
 #2: ffff88807a385288 (&dqp->q_qlock){+.+.}-{3:3}, at: xfs_dqlock fs/xfs/xfs_dquot.h:133 [inline]
 #2: ffff88807a385288 (&dqp->q_qlock){+.+.}-{3:3}, at: xfs_qm_flush_one+0xca/0x350 fs/xfs/xfs_qm.c:1225
3 locks held by syz-executor199/6256:
 #0: ffff8880770680e0 (&type->s_umount_key#42/1){+.+.}-{3:3}, at: alloc_super+0x210/0x940 fs/super.c:229
 #1: ffff88801ea6a158 (&qinf->qi_tree_lock){+.+.}-{3:3}, at: xfs_qm_dquot_walk+0x132/0x4a0 fs/xfs/xfs_qm.c:73
 #2: ffff88807a384be8 (&dqp->q_qlock){+.+.}-{3:3}, at: xfs_dqlock fs/xfs/xfs_dquot.h:133 [inline]
 #2: ffff88807a384be8 (&dqp->q_qlock){+.+.}-{3:3}, at: xfs_qm_flush_one+0xca/0x350 fs/xfs/xfs_qm.c:1225
2 locks held by kworker/0:5/10090:
 #0: ffff888011c66538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
 #1: ffffc9000404fd20 ((work_completion)(&rew.rew_work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
3 locks held by syz-executor199/10092:
 #0: ffff88807f2ec0e0 (&type->s_umount_key#42/1){+.+.}-{3:3}, at: alloc_super+0x210/0x940 fs/super.c:229
 #1: ffff88801e7d6158 (&qinf->qi_tree_lock){+.+.}-{3:3}, at: xfs_qm_dquot_walk+0x132/0x4a0 fs/xfs/xfs_qm.c:73
 #2: ffff888071fe69b8 (&dqp->q_qlock){+.+.}-{3:3}, at: xfs_dqlock fs/xfs/xfs_dquot.h:133 [inline]
 #2: ffff888071fe69b8 (&dqp->q_qlock){+.+.}-{3:3}, at: xfs_qm_flush_one+0xca/0x350 fs/xfs/xfs_qm.c:1225

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

NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.15.117-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
 nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
 watchdog+0xe72/0xeb0 kernel/hung_task.c:295
 kthread+0x3f6/0x4f0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 3624 Comm: kworker/1:1 Not tainted 5.15.117-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
Workqueue: events free_work
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:178 [inline]
RIP: 0010:unwind_next_frame+0x27c/0x1fa0 arch/x86/kernel/unwind_orc.c:448
Code: 00 00 45 39 e0 0f 84 89 01 00 00 4a 8d 3c a5 40 8b ee 8d 45 29 e0 4a 8d 6c 87 fc 49 89 fc 48 39 fd 0f 83 77 02 00 00 49 29 fc <eb> 78 49 c7 c6 a0 6c 88 8a e9 7d 01 00 00 4c 89 ef e8 5e 06 1c 00
RSP: 0018:ffffc9000311f448 EFLAGS: 00000246
RAX: ffffffff8df11cd0 RBX: ffffffff8df11cd4 RCX: ffffffff8df11cd8
RDX: dffffc0000000000 RSI: ffffffff8e57d6f6 RDI: ffffffff8df11cd4
RBP: ffffffff8df11cd4 R08: 0000000000000007 R09: ffffc9000311f5b0
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: ffffffff812faf1a R14: ffffffff8df11cd8 R15: ffffc9000311f560
FS:  0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe28cf4f78 CR3: 000000002358f000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 __unwind_start+0x59d/0x720 arch/x86/kernel/unwind_orc.c:704
 unwind_start arch/x86/include/asm/unwind.h:60 [inline]
 arch_stack_walk+0xdb/0x140 arch/x86/kernel/stacktrace.c:24
 stack_trace_save+0x113/0x1c0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4b/0x80 mm/kasan/common.c:46
 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360
 ____kasan_slab_free+0xd8/0x120 mm/kasan/common.c:366
 kasan_slab_free include/linux/kasan.h:230 [inline]
 slab_free_hook mm/slub.c:1705 [inline]
 slab_free_freelist_hook+0xdd/0x160 mm/slub.c:1731
 slab_free mm/slub.c:3499 [inline]
 kmem_cache_free+0x91/0x1f0 mm/slub.c:3515
 merge_or_add_vmap_area mm/vmalloc.c:1142 [inline]
 merge_or_add_vmap_area_augment mm/vmalloc.c:1161 [inline]
 __purge_vmap_area_lazy+0x1365/0x1740 mm/vmalloc.c:1697
 try_purge_vmap_area_lazy+0x34/0x50 mm/vmalloc.c:1723
 free_unmap_vmap_area mm/vmalloc.c:1778 [inline]
 remove_vm_area+0x1ae/0x1d0 mm/vmalloc.c:2517
 vm_remove_mappings mm/vmalloc.c:2546 [inline]
 __vunmap+0x325/0xa20 mm/vmalloc.c:2611
 free_work+0x57/0x80 mm/vmalloc.c:95
 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2307
 worker_thread+0xaca/0x1280 kernel/workqueue.c:2454
 kthread+0x3f6/0x4f0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
 </TASK>