watchdog: BUG: soft lockup - CPU#0 stuck for 144s! [syz-executor.4:26068] Modules linked in: irq event stamp: 220120766 hardirqs last enabled at (220120765): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (220120765): [] _raw_spin_unlock_irqrestore+0x50/0x70 kernel/locking/spinlock.c:194 hardirqs last disabled at (220120766): [] sysvec_apic_timer_interrupt+0xb/0xc0 arch/x86/kernel/apic/apic.c:1097 softirqs last enabled at (220120762): [] spin_unlock_bh include/linux/spinlock.h:413 [inline] softirqs last enabled at (220120762): [] unlock_sock_fast include/net/sock.h:1644 [inline] softirqs last enabled at (220120762): [] unlock_sock_fast include/net/sock.h:1636 [inline] softirqs last enabled at (220120762): [] mptcp_subflow_cleanup_rbuf net/mptcp/protocol.c:468 [inline] softirqs last enabled at (220120762): [] mptcp_cleanup_rbuf net/mptcp/protocol.c:499 [inline] softirqs last enabled at (220120762): [] mptcp_recvmsg+0xb8b/0x27b0 net/mptcp/protocol.c:2027 softirqs last disabled at (220120760): [] spin_lock_bh include/linux/spinlock.h:373 [inline] softirqs last disabled at (220120760): [] lock_sock_fast+0x5d/0x100 net/core/sock.c:3232 CPU: 0 PID: 26068 Comm: syz-executor.4 Not tainted 5.15.0-rc2-next-20210920-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x38/0x70 kernel/locking/spinlock.c:194 Code: 74 24 10 e8 2a ed 25 f8 48 89 ef e8 72 63 26 f8 81 e3 00 02 00 00 75 25 9c 58 f6 c4 02 75 2d 48 85 db 74 01 fb bf 01 00 00 00 63 08 1a f8 65 8b 05 3c 63 cc 76 85 c0 74 0a 5b 5d c3 e8 b0 bf RSP: 0018:ffffc90004a5f720 EFLAGS: 00000206 RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff1faa266 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001 RBP: ffff888040f86040 R08: 0000000000000001 R09: ffffffff8fd06a07 R10: 0000000000000001 R11: 0000000000000000 R12: ffff888019a023a0 R13: ffffc90004a5f828 R14: dffffc0000000000 R15: ffff888019a02340 FS: 00007f9787de9700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2f627000 CR3: 000000008f266000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: mptcp_wait_data net/mptcp/protocol.c:1767 [inline] mptcp_recvmsg+0xf5b/0x27b0 net/mptcp/protocol.c:2080 inet6_recvmsg+0x11b/0x5e0 net/ipv6/af_inet6.c:659 sock_recvmsg_nosec net/socket.c:944 [inline] ____sys_recvmsg+0x527/0x600 net/socket.c:2626 ___sys_recvmsg+0x127/0x200 net/socket.c:2670 do_recvmmsg+0x24d/0x6d0 net/socket.c:2764 __sys_recvmmsg net/socket.c:2843 [inline] __do_sys_recvmmsg net/socket.c:2866 [inline] __se_sys_recvmmsg net/socket.c:2859 [inline] __x64_sys_recvmmsg+0x20b/0x260 net/socket.c:2859 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: 0033:0x7f978a893739 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f9787de9188 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: ffffffffffffffda RBX: 00007f978a998038 RCX: 00007f978a893739 RDX: 0000000000000002 RSI: 00000000200017c0 RDI: 0000000000000005 RBP: 00007f978a8edcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000100 R11: 0000000000000246 R12: 00007f978a998038 R13: 00007ffe054c3abf R14: 00007f9787de9300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 26060 Comm: syz-executor.0 Not tainted 5.15.0-rc2-next-20210920-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:native_apic_mem_write+0x8/0x10 arch/x86/include/asm/apic.h:110 Code: c7 00 48 ef 8e e8 b8 ae 89 00 eb b0 66 0f 1f 44 00 00 be 01 00 00 00 e9 b6 39 2d 00 cc cc cc cc cc cc 89 ff 89 b7 00 c0 5f ff 0f 1f 80 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 53 89 fb 48 RSP: 0018:ffffc90000dc0fd0 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: ffffffff8b33aa60 RCX: 1ffff110173a3f0c RDX: 1ffffffff166754c RSI: 0000000000000000 RDI: 00000000000000b0 RBP: 0000000000000000 R08: ffffffff8eeff058 R09: ffffffff8eeff04f R10: ffffffff8eeff057 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f9a1f387700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2d72f000 CR3: 00000000939fc000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: apic_eoi arch/x86/include/asm/apic.h:399 [inline] ack_APIC_irq arch/x86/include/asm/apic.h:445 [inline] __sysvec_apic_timer_interrupt+0x79/0x530 arch/x86/kernel/apic/apic.c:1101 sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1097 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:kasan_check_range+0x17/0x180 mm/kasan/generic.c:188 Code: 01 48 0f 45 fa e8 39 a1 ec ff 0f 0b 0f 1f 80 00 00 00 00 48 85 f6 0f 84 70 01 00 00 49 89 f9 41 54 44 0f b6 c2 49 01 f1 55 53 <0f> 82 18 01 00 00 48 b8 ff ff ff ff ff 7f ff ff 48 39 c7 0f 86 05 RSP: 0018:ffffc9000499f650 EFLAGS: 00000286 RAX: 0000000000000001 RBX: 1ffff92000933ecf RCX: ffffffff815becf1 RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffff88806d911808 RBP: ffff88806d911808 R08: 0000000000000001 R09: ffff88806d91180c R10: fffffbfff1fa0d40 R11: 0000000000000000 R12: ffff88806d911810 R13: ffff88806d911818 R14: dffffc0000000000 R15: ffff88806d911780 instrument_atomic_read_write include/linux/instrumented.h:101 [inline] atomic_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:511 [inline] queued_spin_lock include/asm-generic/qspinlock.h:82 [inline] do_raw_spin_lock+0x111/0x2b0 kernel/locking/spinlock_debug.c:115 spin_lock_bh include/linux/spinlock.h:373 [inline] lock_sock_nested+0x5d/0xf0 net/core/sock.c:3186 lock_sock include/net/sock.h:1612 [inline] mptcp_wait_data net/mptcp/protocol.c:1770 [inline] mptcp_recvmsg+0x1047/0x27b0 net/mptcp/protocol.c:2080 inet6_recvmsg+0x11b/0x5e0 net/ipv6/af_inet6.c:659 sock_recvmsg_nosec net/socket.c:944 [inline] ____sys_recvmsg+0x527/0x600 net/socket.c:2626 ___sys_recvmsg+0x127/0x200 net/socket.c:2670 do_recvmmsg+0x24d/0x6d0 net/socket.c:2764 __sys_recvmmsg net/socket.c:2843 [inline] __do_sys_recvmmsg net/socket.c:2866 [inline] __se_sys_recvmmsg net/socket.c:2859 [inline] __x64_sys_recvmmsg+0x20b/0x260 net/socket.c:2859 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: 0033:0x7f9a21e10739 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f9a1f387188 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: ffffffffffffffda RBX: 00007f9a21f14f80 RCX: 00007f9a21e10739 RDX: 0000000000000002 RSI: 00000000200017c0 RDI: 0000000000000005 RBP: 00007f9a21e6acc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000100 R11: 0000000000000246 R12: 00007f9a21f14f80 R13: 00007ffdcde3a72f R14: 00007f9a1f387300 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: 74 24 je 0x26 2: 10 e8 adc %ch,%al 4: 2a ed sub %ch,%ch 6: 25 f8 48 89 ef and $0xef8948f8,%eax b: e8 72 63 26 f8 callq 0xf8266382 10: 81 e3 00 02 00 00 and $0x200,%ebx 16: 75 25 jne 0x3d 18: 9c pushfq 19: 58 pop %rax 1a: f6 c4 02 test $0x2,%ah 1d: 75 2d jne 0x4c 1f: 48 85 db test %rbx,%rbx 22: 74 01 je 0x25 24: fb sti 25: bf 01 00 00 00 mov $0x1,%edi * 2a: e8 63 08 1a f8 callq 0xf81a0892 <-- trapping instruction 2f: 65 8b 05 3c 63 cc 76 mov %gs:0x76cc633c(%rip),%eax # 0x76cc6372 36: 85 c0 test %eax,%eax 38: 74 0a je 0x44 3a: 5b pop %rbx 3b: 5d pop %rbp 3c: c3 retq 3d: e8 .byte 0xe8 3e: b0 bf mov $0xbf,%al