------------[ cut here ]------------ WARNING: CPU: 1 PID: 7442 at fs/iomap/buffered-io.c:975 iomap_page_mkwrite+0x65c/0x840 fs/iomap/buffered-io.c:998 Modules linked in: CPU: 1 PID: 7442 Comm: syz.0.838 Not tainted 5.15.175-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:iomap_page_mkwrite_iter fs/iomap/buffered-io.c:975 [inline] RIP: 0010:iomap_page_mkwrite+0x65c/0x840 fs/iomap/buffered-io.c:998 Code: 80 3c 28 00 74 08 48 89 df e8 20 e7 d5 ff 48 8b 1b 48 89 de 48 83 e6 04 31 ff e8 cf 0e 8c ff 48 83 e3 04 75 3b e8 e4 0a 8c ff <0f> 0b eb 37 4c 8b 2c 24 4c 89 ef 4c 89 e6 44 89 f2 31 c9 4c 8b 44 RSP: 0018:ffffc900038cf680 EFLAGS: 00010283 RAX: ffffffff81f479fc RBX: 0000000000000000 RCX: 0000000000080000 RDX: ffffc9000ee83000 RSI: 00000000000079c7 RDI: 00000000000079c8 RBP: ffffc900038cf890 R08: ffffffff81f479f1 R09: fffff94000265201 R10: 0000000000000000 R11: dffffc0000000001 R12: ffffea0001329000 R13: dffffc0000000000 R14: 0000000000001000 R15: ffffc900038cf740 FS: 00007f4180e9f6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb8b85f4521 CR3: 00000000665fa000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __xfs_filemap_fault+0x3fd/0x950 fs/xfs/xfs_file.c:1346 do_page_mkwrite+0x1a9/0x440 mm/memory.c:2920 wp_page_shared+0x179/0x690 mm/memory.c:3257 handle_pte_fault mm/memory.c:4666 [inline] __handle_mm_fault mm/memory.c:4783 [inline] handle_mm_fault+0x2a3d/0x5960 mm/memory.c:4881 do_user_addr_fault arch/x86/mm/fault.c:1357 [inline] handle_page_fault arch/x86/mm/fault.c:1445 [inline] exc_page_fault+0x271/0x700 arch/x86/mm/fault.c:1501 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:606 RIP: 0010:__put_user_nocheck_4+0x3/0x11 Code: 00 00 48 39 d9 73 54 0f 01 cb 66 89 01 31 c9 0f 01 ca c3 0f 1f 44 00 00 48 bb fd ef ff ff ff 7f 00 00 48 39 d9 73 34 0f 01 cb <89> 01 31 c9 0f 01 ca c3 66 0f 1f 44 00 00 48 bb f9 ef ff ff ff 7f RSP: 0018:ffffc900038cfdf8 EFLAGS: 00050293 RAX: 0000000000000006 RBX: 00007fffffffeffd RCX: 0000000020000340 RDX: 0000000000000000 RSI: ffffffff8aab3e20 RDI: ffffffff8af9f000 RBP: ffffc900038cfef0 R08: dffffc0000000000 R09: fffffbfff1c14c0e R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000 R13: 1ffff92000719fc8 R14: 1ffff92000719fd0 R15: 0000000020000340 __sys_socketpair+0x182/0x700 net/socket.c:1629 __do_sys_socketpair net/socket.c:1695 [inline] __se_sys_socketpair net/socket.c:1692 [inline] __x64_sys_socketpair+0x97/0xb0 net/socket.c:1692 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f418b44fd29 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f4180e9f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000035 RAX: ffffffffffffffda RBX: 00007f418b640080 RCX: 00007f418b44fd29 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000001 RBP: 00007f418b4cbb08 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000020000340 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007f418b640080 R15: 00007ffca8eed5c8 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 48 39 d9 cmp %rbx,%rcx 5: 73 54 jae 0x5b 7: 0f 01 cb stac a: 66 89 01 mov %ax,(%rcx) d: 31 c9 xor %ecx,%ecx f: 0f 01 ca clac 12: c3 ret 13: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 18: 48 bb fd ef ff ff ff movabs $0x7fffffffeffd,%rbx 1f: 7f 00 00 22: 48 39 d9 cmp %rbx,%rcx 25: 73 34 jae 0x5b 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: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) 38: 48 rex.W 39: bb f9 ef ff ff mov $0xffffeff9,%ebx 3e: ff (bad) 3f: 7f .byte 0x7f