INFO: task syz-executor:6498 blocked for more than 143 seconds. Not tainted 6.12.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:20968 pid:6498 tgid:6498 ppid:1 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5328 [inline] __schedule+0x185a/0x4b50 kernel/sched/core.c:6690 __schedule_loop kernel/sched/core.c:6767 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6782 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6839 rwsem_down_write_slowpath+0xeea/0x13a0 kernel/locking/rwsem.c:1176 __down_write_common kernel/locking/rwsem.c:1304 [inline] __down_write kernel/locking/rwsem.c:1313 [inline] down_write+0x1d7/0x220 kernel/locking/rwsem.c:1578 __super_lock fs/super.c:56 [inline] __super_lock_excl fs/super.c:71 [inline] deactivate_super+0xb5/0xf0 fs/super.c:505 cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1373 task_work_run+0x24f/0x310 kernel/task_work.c:239 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x167/0x360 kernel/entry/common.c:218 do_syscall_64+0x8e/0x160 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x7f1bb9b7fa47 RSP: 002b:00007ffc3c93ddf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f1bb9b7fa47 RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc3c93deb0 RBP: 00007ffc3c93deb0 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffc3c93ef30 R13: 00007f1bb9bf11cc R14: 000000000001f6e7 R15: 00007ffc3c93ef70 INFO: task syz.2.17:6795 blocked for more than 143 seconds. Not tainted 6.12.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.2.17 state:D stack:26952 pid:6795 tgid:6794 ppid:6496 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5328 [inline] __schedule+0x185a/0x4b50 kernel/sched/core.c:6690 __schedule_loop kernel/sched/core.c:6767 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6782 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6839 rwsem_down_read_slowpath kernel/locking/rwsem.c:1084 [inline] __down_read_common kernel/locking/rwsem.c:1248 [inline] __down_read kernel/locking/rwsem.c:1261 [inline] down_read+0x705/0xa40 kernel/locking/rwsem.c:1526 __super_lock fs/super.c:58 [inline] super_lock+0x27c/0x400 fs/super.c:120 super_lock_shared fs/super.c:139 [inline] iterate_supers+0x8c/0x520 fs/super.c:931 quota_sync_all fs/quota/quota.c:69 [inline] __do_sys_quotactl fs/quota/quota.c:938 [inline] __se_sys_quotactl+0x38e/0xa30 fs/quota/quota.c:917 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x82/0x160 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x7f4d3157e719 RSP: 002b:00007f4d322a1038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3 RAX: ffffffffffffffda RBX: 00007f4d31735f80 RCX: 00007f4d3157e719 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000101 RBP: 00007f4d315f132e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007f4d31735f80 R15: 00007fff9c71f2f8 INFO: task syz.0.15:6798 blocked for more than 143 seconds. Not tainted 6.12.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.15 state:D stack:25576 pid:6798 tgid:6797 ppid:6488 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5328 [inline] __schedule+0x185a/0x4b50 kernel/sched/core.c:6690 __schedule_loop kernel/sched/core.c:6767 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6782 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6839 rwsem_down_read_slowpath kernel/locking/rwsem.c:1084 [inline] __down_read_common kernel/locking/rwsem.c:1248 [inline] __down_read kernel/locking/rwsem.c:1261 [inline] down_read+0x705/0xa40 kernel/locking/rwsem.c:1526 __super_lock fs/super.c:58 [inline] super_lock+0x27c/0x400 fs/super.c:120 super_lock_shared fs/super.c:139 [inline] iterate_supers+0x8c/0x520 fs/super.c:931 quota_sync_all fs/quota/quota.c:69 [inline] __do_sys_quotactl fs/quota/quota.c:938 [inline] __se_sys_quotactl+0x38e/0xa30 fs/quota/quota.c:917 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x82/0x160 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x7f6c9b17e719 RSP: 002b:00007f6c9bf70038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3 RAX: ffffffffffffffda RBX: 00007f6c9b335f80 RCX: 00007f6c9b17e719 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000101 RBP: 00007f6c9b1f132e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007f6c9b335f80 R15: 00007ffc57489f28 INFO: task syz.4.19:6803 blocked for more than 143 seconds. Not tainted 6.12.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.4.19 state:D stack:25448 pid:6803 tgid:6802 ppid:6495 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5328 [inline] __schedule+0x185a/0x4b50 kernel/sched/core.c:6690 __schedule_loop kernel/sched/core.c:6767 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6782 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6839 rwsem_down_read_slowpath kernel/locking/rwsem.c:1084 [inline] __down_read_common kernel/locking/rwsem.c:1248 [inline] __down_read kernel/locking/rwsem.c:1261 [inline] down_read+0x705/0xa40 kernel/locking/rwsem.c:1526 __super_lock fs/super.c:58 [inline] super_lock+0x27c/0x400 fs/super.c:120 super_lock_shared fs/super.c:139 [inline] iterate_supers+0x8c/0x520 fs/super.c:931 quota_sync_all fs/quota/quota.c:69 [inline] __do_sys_quotactl fs/quota/quota.c:938 [inline] __se_sys_quotactl+0x38e/0xa30 fs/quota/quota.c:917 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x82/0x160 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x7f1fb4b7e719 RSP: 002b:00007f1fb5a46038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3 RAX: ffffffffffffffda RBX: 00007f1fb4d35f80 RCX: 00007f1fb4b7e719 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000101 RBP: 00007f1fb4bf132e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007f1fb4d35f80 R15: 00007ffc4f3dfce8 Showing all locks held in the system: 2 locks held by kworker/u8:0/11: 1 lock held by khungtaskd/30: #0: ffffffff8e1352e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #0: ffffffff8e1352e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffffffff8e1352e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6720 3 locks held by kworker/u8:4/75: #0: ffff88814633d948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline] #0: ffff88814633d948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3310 #1: ffffc900015f7d20 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline] #1: ffffc900015f7d20 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3310 #2: ffffffff8f405848 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4196 3 locks held by kworker/u8:9/3377: #0: ffff88801a649148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline] #0: ffff88801a649148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3310 #1: ffffc9000bd0fd20 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline] #1: ffffc9000bd0fd20 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3310 #2: ffffffff8f405848 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:276 3 locks held by kworker/u8:10/3408: 2 locks held by getty/5470: #0: ffff888033e3a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211 3 locks held by kworker/0:3/5813: 1 lock held by syz-executor/6498: #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline] #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: deactivate_super+0xb5/0xf0 fs/super.c:505 4 locks held by syz.1.21/6788: #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 #1: ffffc90003eb30f0 (&journal->j_mutex){+.+.}-{3:3}, at: reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:813 [inline] #1: ffffc90003eb30f0 (&journal->j_mutex){+.+.}-{3:3}, at: lock_journal fs/reiserfs/journal.c:533 [inline] #1: ffffc90003eb30f0 (&journal->j_mutex){+.+.}-{3:3}, at: do_journal_end+0x39a/0x4aa0 fs/reiserfs/journal.c:4025 #2: ffffc90003eb3180 (&journal->j_flush_mutex){+.+.}-{3:3}, at: reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:813 [inline] #2: ffffc90003eb3180 (&journal->j_flush_mutex){+.+.}-{3:3}, at: flush_journal_list+0x18d/0x1c80 fs/reiserfs/journal.c:1368 #3: ffff88804d34b090 (&jl->j_commit_mutex){+.+.}-{3:3}, at: reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:813 [inline] #3: ffff88804d34b090 (&jl->j_commit_mutex){+.+.}-{3:3}, at: flush_commit_list+0x66e/0x1c10 fs/reiserfs/journal.c:1006 3 locks held by kworker/0:5/6791: 1 lock held by syz.2.17/6795: #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.0.15/6798: #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.4.19/6803: #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.5.23/7325: #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.8.26/7330: #0: ffff88807cf9e0e0 ( &type->s_umount_key #70 ){++++}-{3:3} , at: __super_lock fs/super.c:58 [inline] , at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.6.24/7334: #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3} , at: __super_lock fs/super.c:58 [inline] , at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.9.27/7338: #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.7.25/7340: #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.1.28/7401: #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.3.29/7408: #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.2.31/7425: #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.0.30/7428: #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.4.32/7431: #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.5.33/7474: #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.8.34/7514: #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.7.35/7517: #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.9.37/7540: #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.6.36/7543: #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.1.38/7559: #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.3.39/7584: #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.2.40/7602: #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.0.41/7634: #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.4.42/7642: #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.5.43/7658: #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.8.44/7684: #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.7.45/7703: #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.6.46/7753: #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.9.47/7765: #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.1.48/7782: #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz.3.49/7789: #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 3 locks held by syz-executor/7797: 1 lock held by syz.2.50/7801: #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff88807cf9e0e0 (&type->s_umount_key#70){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz-executor/7814: #0: ffffffff8f405848 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f405848 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6672 ============================================= NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x198/0x300 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline] watchdog+0xfec/0x1030 kernel/hung_task.c:379 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 7797 Comm: syz-executor Not tainted 6.12.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:io_serial_in+0x76/0xb0 drivers/tty/serial/8250/8250_port.c:406 Code: f0 f2 95 fc 89 e9 41 d3 e6 48 83 c3 40 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 b1 af fc fc 44 03 33 44 89 f2 ec <0f> b6 c0 5b 41 5e 41 5f 5d c3 cc cc cc cc 89 e9 80 e1 07 38 c1 7c RSP: 0018:ffffc90004dce718 EFLAGS: 00000006 RAX: 1ffffffff3393105 RBX: ffffffff99c98cc0 RCX: 0000000000000000 RDX: 00000000000003f9 RSI: 0000000000000000 RDI: 0000000000000020 RBP: 0000000000000000 R08: ffffffff84fcac96 R09: fffff520009b9cc4 R10: dffffc0000000000 R11: ffffffff84fcac50 R12: dffffc0000000000 R13: 1ffff920009b9d00 R14: 00000000000003f9 R15: dffffc0000000000 FS: 000055555755a500(0000) GS:ffff8880b8900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4fbab07870 CR3: 000000007720a000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: serial_port_in include/linux/serial_core.h:787 [inline] serial8250_console_write+0x4de/0x1ed0 drivers/tty/serial/8250/8250_port.c:3357 console_emit_next_record kernel/printk/printk.c:3092 [inline] console_flush_all+0x869/0xeb0 kernel/printk/printk.c:3180 __console_flush_and_unlock kernel/printk/printk.c:3239 [inline] console_unlock+0x14f/0x3b0 kernel/printk/printk.c:3279 vprintk_emit+0x730/0xa10 kernel/printk/printk.c:2407 _printk+0xd5/0x120 kernel/printk/printk.c:2432 batadv_check_known_mac_addr+0x2b1/0x410 net/batman-adv/hard-interface.c:526 batadv_hard_if_event+0x3a5/0x1850 net/batman-adv/hard-interface.c:998 notifier_call_chain+0x19f/0x3d0 kernel/notifier.c:93 call_netdevice_notifiers_extack net/core/dev.c:2034 [inline] call_netdevice_notifiers net/core/dev.c:2048 [inline] dev_set_mac_address+0x3d9/0x510 net/core/dev.c:9104 dev_set_mac_address_user+0x31/0x50 net/core/dev.c:9118 do_setlink+0x8b6/0x41f0 net/core/rtnetlink.c:2884 __rtnl_newlink net/core/rtnetlink.c:3725 [inline] rtnl_newlink+0x180b/0x20a0 net/core/rtnetlink.c:3772 rtnetlink_rcv_msg+0x73f/0xcf0 net/core/rtnetlink.c:6675 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2551 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x8dd/0xcb0 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:729 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:744 __sys_sendto+0x39b/0x4f0 net/socket.c:2214 __do_sys_sendto net/socket.c:2226 [inline] __se_sys_sendto net/socket.c:2222 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2222 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x82/0x160 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x7fc7ad7805ac Code: 2a 5a 02 00 44 8b 4c 24 2c 4c 8b 44 24 20 89 c5 44 8b 54 24 28 48 8b 54 24 18 b8 2c 00 00 00 48 8b 74 24 10 8b 7c 24 08 0f 05 <48> 3d 00 f0 ff ff 77 34 89 ef 48 89 44 24 08 e8 70 5a 02 00 48 8b RSP: 002b:00007ffced022960 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007fc7ae464620 RCX: 00007fc7ad7805ac RDX: 000000000000002c RSI: 00007fc7ae464670 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007ffced0229b4 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003 R13: 0000000000000000 R14: 00007fc7ae464670 R15: 0000000000000000