------------[ cut here ]------------ WARNING: CPU: 1 PID: 5128 at fs/iomap/buffered-io.c:975 iomap_page_mkwrite_iter fs/iomap/buffered-io.c:975 [inline] WARNING: CPU: 1 PID: 5128 at fs/iomap/buffered-io.c:975 iomap_page_mkwrite+0x54e/0x690 fs/iomap/buffered-io.c:998 Modules linked in: CPU: 0 PID: 5128 Comm: syz.3.212 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 RIP: 0010:iomap_page_mkwrite_iter fs/iomap/buffered-io.c:975 [inline] RIP: 0010:iomap_page_mkwrite+0x54e/0x690 fs/iomap/buffered-io.c:998 Code: 80 3c 08 00 74 08 4c 89 f7 e8 de bd d8 ff 4d 8b 36 4c 89 f6 48 83 e6 04 31 ff e8 cd b5 93 ff 49 83 e6 04 75 3e e8 e2 b1 93 ff <0f> 0b eb 3a 48 89 df 4c 89 f6 44 89 e2 31 c9 4c 8b 44 24 18 e8 99 RSP: 0018:ffffc900039ef860 EFLAGS: 00010287 RAX: ffffffff81e5705e RBX: ffffea0001726dc0 RCX: 0000000000080000 RDX: ffffc9000fa1e000 RSI: 0000000000002155 RDI: 0000000000002156 RBP: ffffc900039efa10 R08: ffffea0001726dc7 R09: 1ffffd40002e4db8 R10: dffffc0000000000 R11: fffff940002e4db9 R12: 0000000000001000 R13: 1ffff9200073df14 R14: 0000000000000000 R15: ffffc900039ef8c0 FS: 00007f5a559be6c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd3e6509358 CR3: 00000000569c4000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __xfs_filemap_fault+0x353/0x8f0 fs/xfs/xfs_file.c:1346 do_page_mkwrite+0x168/0x3c0 mm/memory.c:2922 wp_page_shared+0x16b/0x6d0 mm/memory.c:3259 handle_pte_fault mm/memory.c:4668 [inline] __handle_mm_fault mm/memory.c:4785 [inline] handle_mm_fault+0x1f06/0x4410 mm/memory.c:4883 do_user_addr_fault+0x489/0xc80 arch/x86/mm/fault.c:1355 handle_page_fault arch/x86/mm/fault.c:1443 [inline] exc_page_fault+0x60/0x100 arch/x86/mm/fault.c:1496 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:606 RIP: 0010:__put_user_nocheck_8+0x3/0x21 Code: 00 00 48 39 d9 73 34 0f 01 cb 89 01 31 c9 0f 01 ca c3 90 90 90 90 90 90 48 bb f9 ef ff ff ff 7f 00 00 48 39 d9 73 14 0f 01 cb <48> 89 01 31 c9 0f 01 ca c3 90 90 90 90 90 0f 01 ca b9 f2 ff ff ff RSP: 0018:ffffc900039efee8 EFLAGS: 00050293 RAX: 00007f5a579f9000 RBX: 00007fffffffeff9 RCX: 00002000000004c0 RDX: 0000000000000000 RSI: ffffffff8a2b3a20 RDI: ffffffff8a79f740 RBP: ffffc900039eff48 R08: ffffffff8d89db2f R09: 1ffffffff1b13b65 R10: dffffc0000000000 R11: fffffbfff1b13b66 R12: dffffc0000000000 R13: 0000000000000000 R14: ffff88807a9e4440 R15: ffff88807a9e4468 __do_sys_io_setup fs/aio.c:1347 [inline] __se_sys_io_setup+0xd6/0x190 fs/aio.c:1327 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f5a577a5f79 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f5a559be028 EFLAGS: 00000246 ORIG_RAX: 00000000000000ce RAX: ffffffffffffffda RBX: 00007f5a57a20180 RCX: 00007f5a577a5f79 RDX: 0000000000000000 RSI: 00002000000004c0 RDI: 0000000000000001 RBP: 00007f5a5783c7e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f5a57a20218 R14: 00007f5a57a20180 R15: 00007ffc2e150b48 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 48 39 d9 cmp %rbx,%rcx 5: 73 34 jae 0x3b 7: 0f 01 cb stac a: 89 01 mov %eax,(%rcx) c: 31 c9 xor %ecx,%ecx e: 0f 01 ca clac 11: c3 ret 12: 90 nop 13: 90 nop 14: 90 nop 15: 90 nop 16: 90 nop 17: 90 nop 18: 48 bb f9 ef ff ff ff movabs $0x7fffffffeff9,%rbx 1f: 7f 00 00 22: 48 39 d9 cmp %rbx,%rcx 25: 73 14 jae 0x3b 27: 0f 01 cb stac * 2a: 48 89 01 mov %rax,(%rcx) <-- trapping instruction 2d: 31 c9 xor %ecx,%ecx 2f: 0f 01 ca clac 32: c3 ret 33: 90 nop 34: 90 nop 35: 90 nop 36: 90 nop 37: 90 nop 38: 0f 01 ca clac 3b: b9 f2 ff ff ff mov $0xfffffff2,%ecx