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List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:190b:b0:3a7:7d26:4ce4 with SMTP id e9e14a558f8ab-3a79ad0fb5dmr123833565ab.9.1732524801977; Mon, 25 Nov 2024 00:53:21 -0800 (PST) Date: Mon, 25 Nov 2024 00:53:21 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <67443b01.050a0220.1cc393.0070.GAE@google.com> Subject: [syzbot] [mm?] INFO: rcu detected stall in sys_setsockopt (4) From: syzbot To: akpm@linux-foundation.org, bigeasy@linutronix.de, davem@davemloft.net, edumazet@google.com, kerneljasonxing@gmail.com, kuba@kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, netdev@vger.kernel.org, pabeni@redhat.com, syzkaller-bugs@googlegroups.com, tglx@linutronix.de Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: cfba9f07a1d6 Add linux-next specific files for 20241122 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=1701175f980000 kernel config: https://syzkaller.appspot.com/x/.config?x=45719eec4c74e6ba dashboard link: https://syzkaller.appspot.com/bug?extid=6e61d59e9d2150c8492b compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13353b78580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/be35516c7ba5/disk-cfba9f07.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/70295210dc7d/vmlinux-cfba9f07.xz kernel image: https://storage.googleapis.com/syzbot-assets/8b5d044072ee/bzImage-cfba9f07.xz The issue was bisected to: commit d15121be7485655129101f3960ae6add40204463 Author: Paolo Abeni Date: Mon May 8 06:17:44 2023 +0000 Revert "softirq: Let ksoftirqd do its job" bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=121d5ee8580000 final oops: https://syzkaller.appspot.com/x/report.txt?x=111d5ee8580000 console output: https://syzkaller.appspot.com/x/log.txt?x=161d5ee8580000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+6e61d59e9d2150c8492b@syzkaller.appspotmail.com Fixes: d15121be7485 ("Revert "softirq: Let ksoftirqd do its job"") rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P6057/1:b..l rcu: (detected by 1, t=10503 jiffies, g=12753, q=1720979 ncpus=2) task:syz-executor state:R running task stack:20544 pid:6057 tgid:6057 ppid:1 flags:0x00000006 Call Trace: context_switch kernel/sched/core.c:5369 [inline] __schedule+0x1850/0x4c30 kernel/sched/core.c:6756 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7078 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:lock_acquire+0x264/0x550 kernel/locking/lockdep.c:5853 Code: 2b 00 74 08 4c 89 f7 e8 ba be 8f 00 f6 44 24 61 02 0f 85 85 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 43 c7 44 25 09 00 00 00 00 43 c7 44 25 RSP: 0018:ffffc9000322f2a0 EFLAGS: 00000206 RAX: 0000000000000001 RBX: 1ffff92000645e60 RCX: ffff88802d22c6d8 RDX: dffffc0000000000 RSI: ffffffff8c0aa840 RDI: ffffffff8c5e88a0 RBP: ffffc9000322f3f8 R08: ffffffff9428a887 R09: 1ffffffff2851510 R10: dffffc0000000000 R11: fffffbfff2851511 R12: 1ffff92000645e5c R13: dffffc0000000000 R14: ffffc9000322f300 R15: 0000000000000246 rcu_lock_acquire include/linux/rcupdate.h:337 [inline] rcu_read_lock include/linux/rcupdate.h:849 [inline] page_ext_get+0x3d/0x2a0 mm/page_ext.c:525 __page_table_check_zero+0xb1/0x350 mm/page_table_check.c:148 page_table_check_free include/linux/page_table_check.h:41 [inline] free_pages_prepare mm/page_alloc.c:1128 [inline] free_unref_page+0xe0e/0x1140 mm/page_alloc.c:2693 discard_slab mm/slub.c:2673 [inline] __put_partials+0xeb/0x130 mm/slub.c:3142 put_cpu_partial+0x17c/0x250 mm/slub.c:3217 __slab_free+0x2ea/0x3d0 mm/slub.c:4468 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286 __kasan_kmalloc+0x23/0xb0 mm/kasan/common.c:385 kasan_kmalloc include/linux/kasan.h:260 [inline] __kmalloc_cache_node_noprof+0x25d/0x3a0 mm/slub.c:4326 kmalloc_node_noprof include/linux/slab.h:924 [inline] __get_vm_area_node+0x132/0x2d0 mm/vmalloc.c:3127 __vmalloc_node_range_noprof+0x344/0x1380 mm/vmalloc.c:3804 __vmalloc_node_noprof mm/vmalloc.c:3909 [inline] vzalloc_noprof+0x79/0x90 mm/vmalloc.c:3982 __do_replace+0xc8/0xa40 net/ipv4/netfilter/ip_tables.c:1046 do_replace net/ipv4/netfilter/ip_tables.c:1141 [inline] do_ipt_set_ctl+0xf02/0x1250 net/ipv4/netfilter/ip_tables.c:1635 nf_setsockopt+0x295/0x2c0 net/netfilter/nf_sockopt.c:101 do_sock_setsockopt+0x3af/0x720 net/socket.c:2313 __sys_setsockopt net/socket.c:2338 [inline] __do_sys_setsockopt net/socket.c:2344 [inline] __se_sys_setsockopt net/socket.c:2341 [inline] __x64_sys_setsockopt+0x1ee/0x280 net/socket.c:2341 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f1f1638070a RSP: 002b:00007ffec3066f38 EFLAGS: 00000202 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007ffec3066fc0 RCX: 00007f1f1638070a RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 0000000000000003 R08: 00000000000002d8 R09: 00007ffec3067377 R10: 00007f1f16509ea0 R11: 0000000000000202 R12: 00007f1f16509e40 R13: 00007ffec3066f5c R14: 0000000000000000 R15: 00007f1f1650c000 rcu: rcu_preempt kthread starved for 9031 jiffies! g12753 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. rcu: RCU grace-period kthread stack dump: task:rcu_preempt state:R running task stack:25720 pid:17 tgid:17 ppid:2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5369 [inline] __schedule+0x1850/0x4c30 kernel/sched/core.c:6756 __schedule_loop kernel/sched/core.c:6833 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6848 schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2045 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2247 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 rcu: Stack dump where RCU GP kthread last ran: Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 8 Comm: kworker/0:0 Not tainted 6.12.0-next-20241122-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 Workqueue: wg-crypt-wg2 wg_packet_tx_worker RIP: 0010:__trace_hardirqs_on_caller kernel/locking/lockdep.c:4346 [inline] RIP: 0010:lockdep_hardirqs_on_prepare+0x317/0x780 kernel/locking/lockdep.c:4406 Code: 00 00 fc ff df eb ac 48 c7 c7 20 48 80 8e 4c 89 ee e8 fd 56 80 03 48 ba 00 00 00 00 00 fc ff df e9 3d ff ff ff 48 8b 44 24 10 <48> 8d 98 c0 0a 00 00 48 89 d8 48 c1 e8 03 0f b6 04 10 84 c0 0f 85 RSP: 0018:ffffc90000007a00 EFLAGS: 00000046 RAX: ffff88801d2bda00 RBX: ffff88801d2be530 RCX: ffffffff817b230a RDX: dffffc0000000000 RSI: 0000000000000008 RDI: ffffffff9428a988 RBP: ffffc90000007ab8 R08: ffffffff9428a98f R09: 1ffffffff2851531 R10: dffffc0000000000 R11: fffffbfff2851532 R12: ffff88801d2be550 R13: 0000000000000002 R14: ffff88801d2be4d8 R15: 1ffff11003a57c9b FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055b1b8f2b008 CR3: 000000000e736000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: trace_hardirqs_on+0x28/0x40 kernel/trace/trace_preemptirq.c:47 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] _raw_spin_unlock_irq+0x23/0x50 kernel/locking/spinlock.c:202 spin_unlock_irq include/linux/spinlock.h:401 [inline] backlog_unlock_irq_enable net/core/dev.c:258 [inline] process_backlog+0x101e/0x15b0 net/core/dev.c:6146 __napi_poll+0xcb/0x490 net/core/dev.c:6877 napi_poll net/core/dev.c:6946 [inline] net_rx_action+0x89b/0x1240 net/core/dev.c:7068 handle_softirqs+0x2c5/0x980 kernel/softirq.c:554 do_softirq+0x11b/0x1e0 kernel/softirq.c:455 __local_bh_enable_ip+0x1bb/0x200 kernel/softirq.c:382 wg_packet_create_data_done drivers/net/wireguard/send.c:247 [inline] wg_packet_tx_worker+0x160/0x810 drivers/net/wireguard/send.c:276 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 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 --- This report is generated by a bot. 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