------------[ cut here ]------------ CPU 1 old state 2 new state 1 WARNING: CPU: 1 PID: 11585 at kernel/rcu/srcutree.c:702 srcu_check_nmi_safety+0x10e/0x130 kernel/rcu/srcutree.c:702 Modules linked in: CPU: 1 PID: 11585 Comm: syz-executor.0 Not tainted 6.10.0-rc3-syzkaller-00044-g2ccbdf43d5e7 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:srcu_check_nmi_safety+0x10e/0x130 kernel/rcu/srcutree.c:702 Code: c0 74 11 3c 03 7f 0d 89 54 24 04 e8 4c 57 77 00 8b 54 24 04 8b b3 c8 01 00 00 44 89 e1 48 c7 c7 60 43 2e 8b e8 b3 a5 dc ff 90 <0f> 0b 90 90 e9 7b ff ff ff e8 24 57 77 00 e9 65 ff ff ff e8 4a 57 RSP: 0018:ffffc9000cad7668 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffffe8ffad164500 RCX: ffffc9002b601000 RDX: 0000000000040000 RSI: ffffffff81511296 RDI: 0000000000000001 RBP: ffffc9000cb788a8 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000003 R12: 0000000000000001 R13: ffffc9000cad7930 R14: ffffc9000cb788a8 R15: ffffc9000cb78828 FS: 0000000000000000(0000) GS:ffff88802c100000(0063) knlGS:00000000f5e96b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000200bd01c CR3: 000000002baec000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: srcu_read_lock include/linux/srcu.h:213 [inline] __kvm_handle_hva_range arch/x86/kvm/../../../virt/kvm/kvm_main.c:615 [inline] kvm_mmu_notifier_invalidate_range_start+0x293/0xb10 arch/x86/kvm/../../../virt/kvm/kvm_main.c:799 mn_hlist_invalidate_range_start mm/mmu_notifier.c:476 [inline] __mmu_notifier_invalidate_range_start+0x3b9/0x8f0 mm/mmu_notifier.c:531 mmu_notifier_invalidate_range_start include/linux/mmu_notifier.h:439 [inline] wp_page_copy mm/memory.c:3322 [inline] do_wp_page+0x2294/0x3290 mm/memory.c:3683 handle_pte_fault mm/memory.c:5396 [inline] __handle_mm_fault+0x2311/0x53f0 mm/memory.c:5523 handle_mm_fault+0x476/0xa00 mm/memory.c:5688 do_user_addr_fault+0x2e5/0xe50 arch/x86/mm/fault.c:1389 handle_page_fault arch/x86/mm/fault.c:1481 [inline] exc_page_fault+0x5c/0xc0 arch/x86/mm/fault.c:1539 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0010:__put_user_nocheck_4+0x7/0x20 arch/x86/lib/putuser.S:97 Code: d9 0f 01 cb 89 01 31 c9 0f 01 ca c3 cc cc cc cc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 0f 01 cb <89> 01 31 c9 0f 01 ca c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00 00 RSP: 0018:ffffc9000cad7cd0 EFLAGS: 00050283 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00000000200bd01c RDX: 00000000200bd000 RSI: ffffffff88b2706d RDI: 0000000000000005 RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000080040000 R13: 00000000200bd000 R14: 0000000000000317 R15: 0000000000000318 __sys_sendmmsg+0x2cc/0x450 net/socket.c:2722 __compat_sys_sendmmsg net/compat.c:360 [inline] __do_compat_sys_sendmmsg net/compat.c:367 [inline] __se_compat_sys_sendmmsg net/compat.c:364 [inline] __ia32_compat_sys_sendmmsg+0x9d/0x100 net/compat.c:364 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf72a4579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f5e965ac EFLAGS: 00000292 ORIG_RAX: 0000000000000159 RAX: ffffffffffffffda RBX: 0000000000000009 RCX: 00000000200bd000 RDX: 0000000000000318 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ---------------- Code disassembly (best guess): 0: d9 0f (bad) (%rdi) 2: 01 cb add %ecx,%ebx 4: 89 01 mov %eax,(%rcx) 6: 31 c9 xor %ecx,%ecx 8: 0f 01 ca clac b: c3 ret c: cc int3 d: cc int3 e: cc int3 f: cc int3 10: 0f 1f 00 nopl (%rax) 13: 90 nop 14: 90 nop 15: 90 nop 16: 90 nop 17: 90 nop 18: 90 nop 19: 90 nop 1a: 90 nop 1b: 90 nop 1c: 90 nop 1d: 90 nop 1e: 90 nop 1f: 90 nop 20: 90 nop 21: 90 nop 22: 90 nop 23: f3 0f 1e fa endbr64 27: 0f 01 cb stac * 2a: 89 01 mov %eax,(%rcx) <-- trapping instruction 2c: 31 c9 xor %ecx,%ecx 2e: 0f 01 ca clac 31: c3 ret 32: cc int3 33: cc int3 34: cc int3 35: cc int3 36: 66 data16 37: 66 data16 38: 2e cs 39: 0f .byte 0xf 3a: 1f (bad) 3b: 84 00 test %al,(%rax) 3d: 00 00 add %al,(%rax)