INFO: task syz-executor.2:4216 blocked for more than 143 seconds. Not tainted 5.17.0-rc8-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:27648 pid: 4216 ppid: 3926 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4995 [inline] __schedule+0x90d/0x2680 kernel/sched/core.c:6304 schedule+0xd2/0x260 kernel/sched/core.c:6377 schedule_timeout+0x19d/0x250 kernel/time/timer.c:1857 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common+0x2af/0x360 kernel/sched/completion.c:106 kthread_stop+0x104/0x4f0 kernel/kthread.c:709 ext4_stop_mmpd+0x34/0xb0 fs/ext4/mmp.c:255 __ext4_fill_super fs/ext4/super.c:5505 [inline] ext4_fill_super+0x76f3/0xc1f0 fs/ext4/super.c:5554 get_tree_bdev+0x398/0x680 fs/super.c:1292 vfs_get_tree+0x7f/0x2c0 fs/super.c:1497 do_new_mount fs/namespace.c:3024 [inline] path_mount+0x7e8/0x1a40 fs/namespace.c:3354 do_mount fs/namespace.c:3367 [inline] __do_sys_mount fs/namespace.c:3575 [inline] __se_sys_mount fs/namespace.c:3552 [inline] __x64_sys_mount+0x1f5/0x260 fs/namespace.c:3552 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x467afa RSP: 002b:00007fb18f08dfa8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000380 RCX: 0000000000467afa RDX: 0000000020000000 RSI: 00000000200000c0 RDI: 00007fb18f08e000 RBP: 00007fb18f08e040 R08: 00007fb18f08e040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020000000 R13: 00000000200000c0 R14: 00007fb18f08e000 R15: 0000000020000200 INFO: task syz-executor.5:4266 blocked for more than 143 seconds. Not tainted 5.17.0-rc8-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:27648 pid: 4266 ppid: 3918 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4995 [inline] __schedule+0x90d/0x2680 kernel/sched/core.c:6304 schedule+0xd2/0x260 kernel/sched/core.c:6377 schedule_timeout+0x19d/0x250 kernel/time/timer.c:1857 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common+0x2af/0x360 kernel/sched/completion.c:106 kthread_stop+0x104/0x4f0 kernel/kthread.c:709 ext4_stop_mmpd+0x34/0xb0 fs/ext4/mmp.c:255 __ext4_fill_super fs/ext4/super.c:5505 [inline] ext4_fill_super+0x76f3/0xc1f0 fs/ext4/super.c:5554 get_tree_bdev+0x398/0x680 fs/super.c:1292 vfs_get_tree+0x7f/0x2c0 fs/super.c:1497 do_new_mount fs/namespace.c:3024 [inline] path_mount+0x7e8/0x1a40 fs/namespace.c:3354 do_mount fs/namespace.c:3367 [inline] __do_sys_mount fs/namespace.c:3575 [inline] __se_sys_mount fs/namespace.c:3552 [inline] __x64_sys_mount+0x1f5/0x260 fs/namespace.c:3552 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x467afa RSP: 002b:00007f6f78de5fa8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000380 RCX: 0000000000467afa RDX: 0000000020000000 RSI: 00000000200000c0 RDI: 00007f6f78de6000 RBP: 00007f6f78de6040 R08: 00007f6f78de6040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020000000 R13: 00000000200000c0 R14: 00007f6f78de6000 R15: 0000000020000200 INFO: task syz-executor.1:4277 blocked for more than 143 seconds. Not tainted 5.17.0-rc8-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:27640 pid: 4277 ppid: 3925 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4995 [inline] __schedule+0x90d/0x2680 kernel/sched/core.c:6304 schedule+0xd2/0x260 kernel/sched/core.c:6377 schedule_timeout+0x19d/0x250 kernel/time/timer.c:1857 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common+0x2af/0x360 kernel/sched/completion.c:106 kthread_stop+0x104/0x4f0 kernel/kthread.c:709 ext4_stop_mmpd+0x34/0xb0 fs/ext4/mmp.c:255 __ext4_fill_super fs/ext4/super.c:5505 [inline] ext4_fill_super+0x76f3/0xc1f0 fs/ext4/super.c:5554 get_tree_bdev+0x398/0x680 fs/super.c:1292 vfs_get_tree+0x7f/0x2c0 fs/super.c:1497 do_new_mount fs/namespace.c:3024 [inline] path_mount+0x7e8/0x1a40 fs/namespace.c:3354 do_mount fs/namespace.c:3367 [inline] __do_sys_mount fs/namespace.c:3575 [inline] __se_sys_mount fs/namespace.c:3552 [inline] __x64_sys_mount+0x1f5/0x260 fs/namespace.c:3552 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x467afa RSP: 002b:00007f1f87617fa8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000380 RCX: 0000000000467afa RDX: 0000000020000000 RSI: 00000000200000c0 RDI: 00007f1f87618000 RBP: 00007f1f87618040 R08: 00007f1f87618040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020000000 R13: 00000000200000c0 R14: 00007f1f87618000 R15: 0000000020000200 Showing all locks held in the system: 3 locks held by kworker/0:0/5: #0: ffff8880b9e39c18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:489 [inline] #0: ffff8880b9e39c18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1318 [inline] #0: ffff8880b9e39c18 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1616 [inline] #0: ffff8880b9e39c18 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x236/0x2680 kernel/sched/core.c:6218 #1: ffff8880b9e27948 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x176/0x4e0 kernel/sched/psi.c:882 #2: ffff8880b9e29558 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x49/0x1a0 kernel/time/timer.c:946 1 lock held by khungtaskd/27: #0: ffffffff8ad792e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6460 2 locks held by getty/3306: #0: ffff88814ac90098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:244 #1: ffffc900027662e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x9dd/0xed0 drivers/tty/n_tty.c:2075 1 lock held by syz-executor.2/4216: #0: ffff88801bd2c0e0 (&type->s_umount_key#27/1){+.+.}-{3:3}, at: alloc_super+0x192/0x9e0 fs/super.c:228 1 lock held by syz-executor.5/4266: #0: ffff88807ed340e0 (&type->s_umount_key#27/1){+.+.}-{3:3}, at: alloc_super+0x192/0x9e0 fs/super.c:228 1 lock held by syz-executor.1/4277: #0: ffff8880601ae0e0 (&type->s_umount_key#27/1){+.+.}-{3:3}, at: alloc_super+0x192/0x9e0 fs/super.c:228 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.17.0-rc8-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x57/0x7d lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x30/0xc0 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x140/0x170 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline] watchdog+0x88c/0xbf0 kernel/hung_task.c:369 kthread+0x299/0x340 kernel/kthread.c:377 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 1045 Comm: kworker/u4:5 Not tainted 5.17.0-rc8-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet RIP: 0010:__memset+0x24/0x30 arch/x86/lib/memset_64.S:39 Code: cc cc cc cc cc cc 0f 1f 44 00 00 49 89 f9 48 89 d1 83 e2 07 48 c1 e9 03 40 0f b6 f6 48 b8 01 01 01 01 01 01 01 01 48 0f af c6 48 ab 89 d1 f3 aa 4c 89 c8 c3 90 49 89 f9 40 88 f0 48 89 d1 f3 RSP: 0018:ffffc900049efa78 EFLAGS: 00000212 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000079 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88806375d838 RBP: ffff88800fc41dc0 R08: 00000000000003c0 R09: ffff88806375d800 R10: fffff5200093deef R11: 000000000007c078 R12: 00000000000a2a20 R13: 00000000000003c0 R14: 0000000000000000 R15: 00000000000a2a20 FS: 0000000000000000(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055c0e222f600 CR3: 000000000aa8e000 CR4: 0000000000350ef0 Call Trace: slab_post_alloc_hook mm/slab.h:734 [inline] slab_alloc_node mm/slub.c:3230 [inline] __kmalloc_node_track_caller+0x2c9/0x470 mm/slub.c:4957 kmalloc_reserve net/core/skbuff.c:354 [inline] __alloc_skb+0x8a/0x270 net/core/skbuff.c:426 __netdev_alloc_skb+0x40/0x380 net/core/skbuff.c:494 __netdev_alloc_skb_ip_align include/linux/skbuff.h:2968 [inline] netdev_alloc_skb_ip_align include/linux/skbuff.h:2978 [inline] batadv_iv_ogm_aggregate_new+0xc9/0x480 net/batman-adv/bat_iv_ogm.c:559 batadv_iv_ogm_queue_add net/batman-adv/bat_iv_ogm.c:671 [inline] batadv_iv_ogm_schedule_buff+0xbc0/0x1030 net/batman-adv/bat_iv_ogm.c:850 batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:869 [inline] batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:862 [inline] batadv_iv_send_outstanding_bat_ogm_packet+0x59f/0x920 net/batman-adv/bat_iv_ogm.c:1713 process_one_work+0x879/0x1410 kernel/workqueue.c:2307 worker_thread+0x5a0/0xf60 kernel/workqueue.c:2454 kthread+0x299/0x340 kernel/kthread.c:377 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 ---------------- Code disassembly (best guess): 0: cc int3 1: cc int3 2: cc int3 3: cc int3 4: cc int3 5: cc int3 6: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) b: 49 89 f9 mov %rdi,%r9 e: 48 89 d1 mov %rdx,%rcx 11: 83 e2 07 and $0x7,%edx 14: 48 c1 e9 03 shr $0x3,%rcx 18: 40 0f b6 f6 movzbl %sil,%esi 1c: 48 b8 01 01 01 01 01 movabs $0x101010101010101,%rax 23: 01 01 01 26: 48 0f af c6 imul %rsi,%rax * 2a: f3 48 ab rep stos %rax,%es:(%rdi) <-- trapping instruction 2d: 89 d1 mov %edx,%ecx 2f: f3 aa rep stos %al,%es:(%rdi) 31: 4c 89 c8 mov %r9,%rax 34: c3 retq 35: 90 nop 36: 49 89 f9 mov %rdi,%r9 39: 40 88 f0 mov %sil,%al 3c: 48 89 d1 mov %rdx,%rcx 3f: f3 repz