watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor700:23334] Modules linked in: irq event stamp: 22194 hardirqs last enabled at (22193): [] restore_regs_and_return_to_kernel+0x0/0x2a hardirqs last disabled at (22194): [] apic_timer_interrupt+0x8e/0xa0 arch/x86/entry/entry_64.S:793 arch/x86/entry/entry_64.S:793 softirqs last enabled at (18012): [] __do_softirq+0x68b/0x9ff kernel/softirq.c:314 kernel/softirq.c:314 softirqs last disabled at (17971): [] invoke_softirq kernel/softirq.c:368 [inline] softirqs last disabled at (17971): [] invoke_softirq kernel/softirq.c:368 [inline] kernel/softirq.c:409 softirqs last disabled at (17971): [] irq_exit+0x193/0x240 kernel/softirq.c:409 kernel/softirq.c:409 CPU: 0 PID: 23334 Comm: syz-executor700 Not tainted 4.14.258-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff888097bb6340 task.stack: ffff88809bbd8000 RIP: 0010:memcpy+0xc/0x50 mm/kasan/kasan.c:301 mm/kasan/kasan.c:301 RSP: 0018:ffff88809bbdf278 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 RAX: ffffed101377bea8 RBX: 0000000000000000 RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffff88809bbdf360 RDI: ffff8880a1eafcf8 RBP: ffff88809bbdf360 R08: ffff88823fff7018 R09: ffff88823fff700f R10: ffff88823fff7017 R11: 0000010163cfb707 R12: 0000000000000008 R13: ffff88809bbdf360 R14: ffff88809bbdf528 R15: 0000000000000008 FS: 00007f56fb176700(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020e37000 CR3: 00000000ab0bd000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: memcpy include/linux/string.h:376 [inline] memcpy_common kernel/events/internal.h:172 [inline] __output_copy kernel/events/internal.h:176 [inline] perf_output_read_group kernel/events/core.c:5899 [inline] memcpy include/linux/string.h:376 [inline] kernel/events/core.c:5932 memcpy_common kernel/events/internal.h:172 [inline] kernel/events/core.c:5932 __output_copy kernel/events/internal.h:176 [inline] kernel/events/core.c:5932 perf_output_read_group kernel/events/core.c:5899 [inline] kernel/events/core.c:5932 perf_output_read+0x6c9/0x1090 kernel/events/core.c:5932 kernel/events/core.c:5932 perf_output_sample+0xa28/0x16f0 kernel/events/core.c:5974 kernel/events/core.c:5974 __perf_event_output kernel/events/core.c:6287 [inline] __perf_event_output kernel/events/core.c:6287 [inline] kernel/events/core.c:6300 perf_event_output_forward+0xf8/0x1f0 kernel/events/core.c:6300 kernel/events/core.c:6300 __perf_event_overflow+0x113/0x310 kernel/events/core.c:7549 kernel/events/core.c:7549 perf_swevent_overflow kernel/events/core.c:7625 [inline] perf_swevent_overflow kernel/events/core.c:7625 [inline] kernel/events/core.c:7653 perf_swevent_event+0x299/0x460 kernel/events/core.c:7653 kernel/events/core.c:7653 do_perf_sw_event kernel/events/core.c:7766 [inline] do_perf_sw_event kernel/events/core.c:7766 [inline] kernel/events/core.c:7797 ___perf_sw_event+0x2a1/0x480 kernel/events/core.c:7797 kernel/events/core.c:7797 __perf_sw_event+0x4f/0x100 kernel/events/core.c:7809 kernel/events/core.c:7809 perf_sw_event include/linux/perf_event.h:1046 [inline] perf_sw_event include/linux/perf_event.h:1046 [inline] arch/x86/mm/fault.c:1483 __do_page_fault+0x692/0xad0 arch/x86/mm/fault.c:1483 arch/x86/mm/fault.c:1483 page_fault+0x25/0x50 arch/x86/entry/entry_64.S:1123 arch/x86/entry/entry_64.S:1123 RIP: 0010:copy_user_enhanced_fast_string+0xe/0x20 arch/x86/lib/copy_user_64.S:181 arch/x86/lib/copy_user_64.S:181 RSP: 0018:ffff88809bbdfa60 EFLAGS: 00050206 RAX: ffffed1011eea000 RBX: 0000000000008000 RCX: 0000000000006acb RDX: 0000000000008000 RSI: 0000000020e37000 RDI: ffff88808f749535 RBP: 0000000020e35acb R08: 0000000000000001 R09: ffffed1011ee9fff R10: ffff88808f74ffff R11: 0000000000000000 R12: ffff88808f748000 R13: 00007ffffffff000 R14: 0000000020e3dacb R15: ffff8880b17b4540 copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline] raw_copy_from_user arch/x86/include/asm/uaccess_64.h:55 [inline] copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline] lib/iov_iter.c:146 raw_copy_from_user arch/x86/include/asm/uaccess_64.h:55 [inline] lib/iov_iter.c:146 copyin+0x99/0xc0 lib/iov_iter.c:146 lib/iov_iter.c:146 _copy_from_iter_full+0x19c/0x760 lib/iov_iter.c:608 lib/iov_iter.c:608 copy_from_iter_full include/linux/uio.h:126 [inline] skb_do_copy_data_nocache include/net/sock.h:1892 [inline] skb_copy_to_page_nocache include/net/sock.h:1918 [inline] copy_from_iter_full include/linux/uio.h:126 [inline] net/ipv4/tcp.c:1360 skb_do_copy_data_nocache include/net/sock.h:1892 [inline] net/ipv4/tcp.c:1360 skb_copy_to_page_nocache include/net/sock.h:1918 [inline] net/ipv4/tcp.c:1360 tcp_sendmsg_locked+0x23fc/0x2ef0 net/ipv4/tcp.c:1360 net/ipv4/tcp.c:1360 tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1457 net/ipv4/tcp.c:1457 inet_sendmsg+0x11a/0x4e0 net/ipv4/af_inet.c:762 net/ipv4/af_inet.c:762 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg_nosec net/socket.c:646 [inline] net/socket.c:656 sock_sendmsg+0xb5/0x100 net/socket.c:656 net/socket.c:656 SYSC_sendto net/socket.c:1763 [inline] SYSC_sendto net/socket.c:1763 [inline] net/socket.c:1731 SyS_sendto+0x1c7/0x2c0 net/socket.c:1731 net/socket.c:1731 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f56fb1c9529 RSP: 002b:00007f56fb176308 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f56fb2534e8 RCX: 00007f56fb1c9529 RDX: ffffffffffffffef RSI: 0000000020d7cfcb RDI: 0000000000000006 RBP: 00007f56fb2534e0 R08: 0000000000000000 R09: 0000000000000053 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f56fb21f664 R13: 00007ffd92bd4eff R14: 00007f56fb176400 R15: 0000000000022000 Code: 1b fa ff ff 4c 89 e2 4c 89 ee 48 89 ef 5d 41 5c 41 5d e9 28 c2 81 05 0f 1f 84 00 00 00 00 00 41 55 49 89 f5 41 54 49 89 d4 31 d2 <55> 48 8b 4c 24 18 48 89 fd 4c 89 e6 4c 89 ef e8 e0 f9 ff ff 48 ---------------- Code disassembly (best guess), 3 bytes skipped: 0: ff 4c 89 e2 decl -0x1e(%rcx,%rcx,4) 4: 4c 89 ee mov %r13,%rsi 7: 48 89 ef mov %rbp,%rdi a: 5d pop %rbp b: 41 5c pop %r12 d: 41 5d pop %r13 f: e9 28 c2 81 05 jmpq 0x581c23c 14: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1) 1b: 00 1c: 41 55 push %r13 1e: 49 89 f5 mov %rsi,%r13 21: 41 54 push %r12 23: 49 89 d4 mov %rdx,%r12 26: 31 d2 xor %edx,%edx * 28: 55 push %rbp <-- trapping instruction 29: 48 8b 4c 24 18 mov 0x18(%rsp),%rcx 2e: 48 89 fd mov %rdi,%rbp 31: 4c 89 e6 mov %r12,%rsi 34: 4c 89 ef mov %r13,%rdi 37: e8 e0 f9 ff ff callq 0xfffffa1c 3c: 48 rex.W ---------------- Code disassembly (best guess), 3 bytes skipped: 0: ff 4c 89 e2 decl -0x1e(%rcx,%rcx,4) 4: 4c 89 ee mov %r13,%rsi 7: 48 89 ef mov %rbp,%rdi a: 5d pop %rbp b: 41 5c pop %r12 d: 41 5d pop %r13 f: e9 28 c2 81 05 jmpq 0x581c23c 14: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1) 1b: 00 1c: 41 55 push %r13 1e: 49 89 f5 mov %rsi,%r13 21: 41 54 push %r12 23: 49 89 d4 mov %rdx,%r12 26: 31 d2 xor %edx,%edx * 28: 55 push %rbp <-- trapping instruction 29: 48 8b 4c 24 18 mov 0x18(%rsp),%rcx 2e: 48 89 fd mov %rdi,%rbp 31: 4c 89 e6 mov %r12,%rsi 34: 4c 89 ef mov %r13,%rdi 37: e8 e0 f9 ff ff callq 0xfffffa1c 3c: 48 rex.W